CN108286201A - A kind of technique of wheat straw fiber and its biological enzyme separation fiber - Google Patents
A kind of technique of wheat straw fiber and its biological enzyme separation fiber Download PDFInfo
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- CN108286201A CN108286201A CN201710011881.0A CN201710011881A CN108286201A CN 108286201 A CN108286201 A CN 108286201A CN 201710011881 A CN201710011881 A CN 201710011881A CN 108286201 A CN108286201 A CN 108286201A
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- wheat straw
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H8/00—Macromolecular compounds derived from lignocellulosic materials
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
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- Health & Medical Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
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- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Enzymes And Modification Thereof (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to bio-pulping fields, a kind of wheatgrass cellulose is provided, it is intact with the stalk fibre length that enzyme molecule directional cutting detaches, overcome the result that fiber fines are destroyed in traditional chemical slurrying, 0.80 1.10mm of length weight average fiber length, 1.20 1.50mm of mass weight average fiber length.The present invention also provides a kind of wheat straw waste fibers, include the fibre structure of above-mentioned wheatgrass cellulose, and wheat straw waste fiber quality can reach：Brightness（Whiteness）53 75%, 8 26K of hardness, folding strength 30 75 times, 3.3 5.5 mN ﹒ m of tear index2/ g, 45.0 62.0 N ﹒ m/g of tensile index.The present invention also provides the purposes of wheat straw defibering processes, the wheat straw waste fiber.The production process of the present invention is generated without high temeperature chemistry black digestion liquid, fiber quality（Length, whiteness, short fibre content etc.）It is substantially better than the quality of traditional chemical slurrying, slurry yield improves 25% or more than traditional chemical slurrying rate, and water consume, the energy consumption of production process reduce by 30% or more than traditional chemical slurrying.
Description
Technical field
The present invention relates to the techniques that a kind of biological enzyme detaches wheat straw fiber, belong to bio-pulping field.
Background technology
Wheat straw waste is mainly made of cellulose, hemicellulose and lignin, is accounted for by the cellulose that glucose molecule is formed by connecting
48% or so of stalk gross mass, is the most component of content, this fiber be widely used in pulping and paper-making, cellulosic ethanol,
The fields such as biological dye, bioenergy.
The method that fiber generally uses high temperature to add chemical assistant is detached in traditional wheat straw waste pulping and paper-making, it is main at present
Using sulphite process and soda-aq cooking.The principle of sulfite pulping be free sulfurous acid with lignified symphysis at
The lignin sulfonic acid of indissoluble forms readily soluble lignosulfonates, water occurs due to sulfonation in the presence of having alkali
Solution reaction, lignin are cracked into the more soluble molecular fragment of smaller, and lignin is dissolved and cracks and dissolve out, to discharge
Go out plant fiber.The principle of soda anthraquinone process is to carry out boiling using sodium hydroxide solution, and lye is by lumen and wears
It crosses cell wall to spread to the inside of raw material, the lye and pectin therein, hemicellulose for entering intercellular layer act on, and keeps its molten
Solution then acts on the lignin of intercellular layer, so that it is constantly dissolved in cooking liquor so that fiber is separated.In hydroxide
The anthraquinone for being equivalent to fibrous raw material weight 0.05~0.6% is added in sodium cooking liquor, to prevent harmful cellulose and half fiber
Tie up the peeling reaction of element.
The characteristics of both chemical wheat straw waste pulping process is：High temperature, largely uses chemicals auxiliary agent at high pressure, de-
During lignin, carbohydrate is not only broken up（Fiber）So that slurry rate is reduced, and more seriously in slurrying
Reluctant black digestion liquid is formed in the process, is a kind of pole due to containing a large amount of lignin and chemicals in black digestion liquid
Its intractable industry high-concentration liquid containing solid waste can not use existing water technology to solve the pollution problem of black digestion liquid.
At present there are mainly two types of the processing methods of wheat straw waste pulping and digesting black liquor：When alkali recovery process, but in technique
The problem of producing paper white sludge after-treatment；Second is that slurry-spraying pelletizing after black digestion liquid concentration, compounding nutrient is produced wood
Quality Yellow humic acid fertilizer, but since high temperature drying course generates VOCs and NH in slurry-spraying pelletizing3Stench flue gas causes secondary dirt
Dye, there are no rational governance ways for wheat straw waste pulping and digesting black liquor at present, develop novel wheat straw waste fiber green point
Separating process is scientific research personnel and the target that manufacturing enterprise is pursued.
With the development of modern biotechnology, a kind of green slurrying being combined with traditional pulping process using bioengineering
Technology develops rapidly, it is in pulping process, and raw material does not discharge harmful black liquor without boiling, realizes the full mistake of slurrying
The hamlessizing technology of journey is that a kind of novel, unique technology for producing plant fiber, this process are in pulping technique field
It is realized by the chemicals auxiliary agent used in high-activity biological enzymes extraction tradition slurrying.Biological enzyme has catalysis
Protein is made of amino acid long chain, and long-chain forms the specific three dimensional space knot of enzyme molecule by different foldings and spiral
Structure, it has special catalysis, shows as：（1）High efficiency：Make catalyst with enzyme, the catalytic efficiency of enzyme is general inorganic
The 10 of catalyst7~1013Times.（2）Specificity：A kind of enzyme can only be catalyzed a kind of or a substance chemical reaction, i.e. enzyme is to be only capable of
The catalyst for promoting specific compound, specified chemical key, specified chemical to change.（3）Low reaction condition：General organic catalyst needs
Want the drastic conditions such as high temperature, high pressure, strong acid, highly basic realize chemical reaction, and enzymic catalytic reaction then can relatively mild room temperature,
It is carried out under normal pressure.（4）Safety：It is protein currently used for industrial biological enzyme, is made of amino acid monomer link, no
As microorganism exist it is infectious, nature by ultraviolet light, heat, ray, surfactant, metal salt, strong acid, highly basic and
The factors such as other chemical reagent such as oxidant, reducing agent influence when quickly deactivation and be degraded.（5）The feature of environmental protection：Biological enzyme
Different structural constituents is cut at point of contact with targeting by different biological enzyme, mixed substrate raw material is separated, this process
The generation of contamination-free.
Biological enzymolysis technology is the green manufacture technology that countries in the world are carried out energetically, and biological green manufacture substitutes traditional chemical
Manufacture is a kind of development trend.It is the activity problems of enzyme that biological enzyme, which utilizes limited principal element, in industrial production at present, is used
Modern genetic engineering technology, improved production strain are the main paths for obtaining high-activity bio-enzyme and its utilizing.
Invention content
The present invention be on the basis of green slurrying theory, according to the characteristics of enzyme effect and enzyme activity condition, pulping process not
It is urged to become reconciled enzyme digestion reaction using different biological enzyme with the stage, substitutes the use of chemicals to detach different wheat straw waste components.
Low energy consumption, water consume is few, unimpeded system black liquor, the wheat straw green separation without fiber destruction it is an object of the invention to provide a kind of
Technique.
A kind of wheatgrass cellulose of another object of the present invention offer and wheat straw waste fiber.
Another object of the present invention provides the wheat straw waste fiber producing processes and purposes.
A kind of wheatgrass cellulose, it is characterised in that preserved with the wheat straw waste fiber length that enzyme molecule directional cutting detaches
It is good, overcome it is that fiber fines in traditional chemical slurrying are destroyed as a result, length-weight average fiber length 0.80-1.10mm,
Quality-weight average fiber length 1.20-1.50mm.
The length-weight average fiber length, quality-weight average fiber length are all made of GB/T29779-2013
Method measures.
The present invention also provides a kind of wheat straw waste fiber, the wheat straw waste fiber is the fibre for including above-mentioned wheatgrass cellulose
Tie up structure.
A kind of stalk fibre, which is characterized in that wheat straw waste fiber quality can reach：Brightness（Whiteness）>=53%, preferably
, brightness（Whiteness）>=55%, brightness（Whiteness）>=60%, brightness（Whiteness）>=65%, brightness（Whiteness）>=70%, brightness（Whiteness）
>=75% etc. or above-mentioned any number range combinations；Hardness 8-26K, it is preferred that hardness 8K, 12K, 15K, 18K,
The range combinations of 20K, 22K, 26K or above-mentioned any number；Folding strength >=30 time, it is preferred that folding strength >=35 time, folding
Degree >=40 times, folding strength >=45 time, folding strength >=50 time, folding strength >=55 time, folding strength >=60 time, folding strength >=65 time are resistance to
The range combinations of folding degree >=70 time, folding strength >=75 time or above-mentioned any number；The mN ﹒ m of tear index >=3.32/ g, preferably
, the mN ﹒ m of tear index >=3.82/ g, the mN ﹒ m of tear index >=4.32/ g, tear index >=4.8mN ﹒ m2/ g, tear index >=
5.5 mN ﹒ m2The range combinations of/g or above-mentioned any number；The N ﹒ m/g of tensile index >=45.0, it is preferred that tensile index >=
50.0 N ﹒ m/g, the N ﹒ m/g of tensile index >=55.0, the N ﹒ m/g of tensile index >=60.0, the N ﹒ m/g of tensile index >=62.0, or
The range combinations of the above-mentioned any number of person.
A kind of wheat straw waste fiber, which is characterized in that wheat straw waste fiber quality can reach：Brightness（Whiteness）53-
75%, hardness 8-26K, folding strength 30-75 times, tear index 3.3-5.5 mN ﹒ m2/ g, tensile index 45.0-62.0 N ﹒ m/g.
The present invention is realized by following measures：A kind of wheat straw defibering processes, include the following steps：
1）Enzymatic reaction
Complex enzyme I is added in wheat straw raw material, heats up and maintains temperature at 80-120 DEG C, in intermittently or serially enzymolysis reactor
Even stirring, reaction period maintain pH 9-13, reaction time 40-200min.
2）Enzyme digestion reaction I
After the completion of enzymatic reaction, Complex Ⅱ is added, stirs evenly, temperature maintains 70-100 DEG C.When the reaction of enzyme digestion reaction I
Between be 20-220min；
3）Enzyme digestion reaction II
After the completion of enzyme digestion reaction I, it is cooled to 40-80 DEG C, complex enzyme III is added, stirs evenly, reaction time 30-150min.
4）Enzyme digestion reaction III
After the completion of enzyme digestion reaction II, it is cooled to 30-60 DEG C, complex enzyme IV is added, stirs evenly, reaction time 120-720min.
5）Fiber separation
It after the enzymatic of above-mentioned different phase and enzyme digestion reaction, will be separated by solid-liquid separation by staple extrusion equipment, solid content is to plant
The wheat straw waste fiber of object true qualities；Liquid portion is enzymolysis waste liquid, from wherein isolating lignin product.
After the existing pulping process technical finesses such as this fiber can be discongested through fluffer, pressurized screen filters, obtain fine
Plant fiber material.
The present invention also provides a kind of wheat straw defibering processes, including above-mentioned enzymatic reaction, enzyme digestion reaction I, enzyme digestion reaction
II and fiber separation step.Preferably, further include pretreatment of raw material.
The present invention also provides a kind of wheat straw defibering processes, including above-mentioned enzymatic reaction, enzyme digestion reaction I, enzyme digestion reaction
III and fiber separation step.Preferably, further include pretreatment of raw material.
The present invention also provides a kind of wheat straw defibering processes, including above-mentioned enzymatic reaction, enzyme digestion reaction I and fiber separation
Step.Preferably, further include pretreatment of raw material.
Preferably, the wheat straw defibering processes, further include pretreatment of raw material；It is 3-5cm by wheat straw raw material chopping, clear
After washing, it is put into enzymolysis reactor.
Preferably, the enzymolysis reactor can be batch reactor, can also be flow reactor, solid-to-liquid ratio 1:2-
10, it is furthermore preferred that solid-to-liquid ratio is 1：3-6.The solid-to-liquid ratio is the weight ratio of solid matter and liquid substance in reaction vessel,
The substances not soluble in water such as the wheat straw that solid matter is added in the method for the present invention, liquid substance are mainly to be added in reacting
Water and other be dissolved in the substance of water.When raw material enters enzymolysis reactor, in order to meet certain solid-to-liquid ratio, it need to be added a certain amount of
Water.Those skilled in the art can be according to actual needs solid-to-liquid ratio come determine be added water amount.
Preferably, step 1）The complex enzyme I, is mainly made of alkaline high temperature enzyme, including alpha-amylase, alkalinity are high
Warm zytase fits the requirement of reaction temperature, pH, time and response intensity according to enzyme according to the sequencing of cleavage site,
It is more than 80000U/g as radix using enzyme activity, the mass number that conversion ton wheat straw raw material adds various enzymes is：Alpha-amylase 20-60g；
Alkaline high-temperature xylanase 20-80g.It is furthermore preferred that the complex enzyme I, conversion ton wheat straw raw material adds the mass number of various enzymes
For：Alpha-amylase 20-50g, alkaline high-temperature xylanase 20-60g.
Preferably, step 1）Middle maintenance temperature is at 90-100 DEG C, the uniform stirring in intermittently or serially enzymolysis reactor, with
Alkali adjusts pH value, and the reaction period maintains pH value 11-12, reaction time 60-150min.
Preferably, step 2）I stage main decomposition lignin of enzyme digestion reaction and the company for cutting off lignin and its hetero-organization
It connects.After the completion of enzymatic reaction, under natural ph, Complex Ⅱ is added, stirs evenly, temperature maintains 85-95 DEG C.It is compound
Enzyme II mainly by the enzyme of decomposition lignin and cuts off the enzyme group connected between lignin and cellulose, hemicellulose and other components
At, according to the sequencing of cleavage site, the requirement of reaction temperature, pH, time and response intensity is fitted according to enzyme, it is big with enzyme activity
It is radix in 80000U/g, the mass number that conversion ton wheat straw raw material adds various enzymes is：High-temperature xylanase 20-200g, high temperature
Alkaline pectase 20-120g, alpha-amylase 20-120g.Preferably, Complex Ⅱ, using enzyme activity be more than 80000U/g as radix,
Conversion ton wheat straw raw material adds the mass numbers of various enzymes and is：High-temperature xylanase 20-180g, high-temperature alkaline pectase 20-100g,
Alpha-amylase 20-100g.
Preferably, step 2）Enzyme digestion reaction I is the degradation for cooperateing with peroxidase, realizes and generates in enzymolysis liquid
H2O2Oxidative function, realized by following two approach,（1）Directly add H2O2, H is added with ton wheat straw2O2（With pure
100% H2O2Meter）Mass number be 20-100kg.Preferably, H is added with ton wheat straw2O2（With pure 100% H2O2Meter）Matter
Amount number is 20-80kg.（2）One or more groups of electrodes, DC voltage 12V, cathode-current density 30- are installed in enzymolysis liquid
200A/m2, electrochemical reaction occurs under conditions of cathode is aerobic and obtains H2O2。
Preferably, step 2）The reaction time of enzyme digestion reaction I is 30-150min, it is furthermore preferred that step 2）Enzyme digestion reaction I
Reaction time be 40-120min.
Preferably, step 3）This stage continue decompose lignin and cut off lignin and its hetero-organization connection.In enzyme
After the completion of solution reaction I, it is cooled to 50-70 DEG C, under the conditions of natural pH, complex enzyme III is added, stirs evenly.
Preferably, step 3）Complex enzyme III mainly by the enzyme of decomposition lignin and cut-out lignin and cellulose, half fiber
The enzyme composition connected between dimension element, according to the sequencing of cleavage site, reaction temperature, pH, time and reaction are fitted according to enzyme
The requirement of intensity is more than 80000U/g as radix using enzyme activity, and the mass number that conversion ton wheat straw raw material adds various enzymes is：Neutrality paint
Enzyme 60-500g, carbohydrase 6-140g；Zytase 10-180g, lipase 6-100g.Preferably, step 3）Complex enzyme III,
It is more than 80000U/g as radix using enzyme activity, the mass number that conversion ton wheat straw raw material adds various enzymes is：Neutral laccase 70-400g,
Carbohydrase 8-120g, zytase 10-160g, lipase 8-80g.
Preferably, step 3）Reaction time 40-120min.
Preferably, step 4）III stage of enzyme digestion reaction continues to decompose lignin and cuts off the company of lignin and its hetero-organization
It connects.After the completion of enzyme digestion reaction II, it is cooled to 40-50 DEG C, under the conditions of natural pH, complex enzyme IV is added, stirs evenly.
Preferably, step 4）Complex enzyme IV mainly by the enzyme of decomposition lignin and cut-out lignin and cellulose, half fiber
The enzyme composition connected between dimension element, according to the sequencing of cleavage site, reaction temperature, pH, time and reaction are fitted according to enzyme
The requirement of intensity is more than 50000U/g as radix using enzyme activity, and the mass number that conversion ton wheat straw raw material adds various enzymes is：Neutrality paint
Enzyme 50-400g, lipase 20-230g, zytase 25-200g, pectase 10-150g, mannase 15-260g.It is more excellent
Choosing, step 4）Complex enzyme IV, 50000U/g is more than as radix using enzyme activity, conversion ton wheat straw raw material adds the quality of various enzymes
Number is：Neutral laccase 60-350g, lipase 15-200g, zytase 30-180g, pectase 12-140g, mannase
20-240g。
Preferably, step 4）Reaction time 180-600min.
Amylase with enzymatic activity when alpha-amylase refers to temperature >=80 DEG C.
Zytase with enzymatic activity when alkaline high-temperature xylanase refers to temperature >=80 DEG C, pH >=9.
Zytase with enzymatic activity when high-temperature xylanase refers to temperature >=70 DEG C.
Pectase with enzymatic activity when high-temperature alkaline pectase refers to temperature >=70 DEG C, pH >=8.
Laccase with enzymatic activity when neutral laccase refers to pH >=7.
By pretreatment of raw material, enzymatic reaction, enzyme digestion reaction I, enzyme digestion reaction II, this four-stage biology of enzyme digestion reaction III
It digests, wheat straw waste fiber quality can reach after fiber separation：Brightness（Whiteness）53-75%, hardness 8-26K, folding strength 30-
75 times, tear index 3.3-5.5 mN ﹒ m2/ g, tensile index 45.0-62.0 N ﹒ m/g.
By pretreatment of raw material, enzymatic reaction, enzyme digestion reaction I, these three the stage biological enzymolysis of enzyme digestion reaction II and fiber
Pretreatment of raw material is passed through in separation, enzymatic reaction, enzyme digestion reaction I, these three the stage biological enzymolysis of enzyme digestion reaction III and fiber point
From or pass through pretreatment of raw material, wheat straw waste is fine after enzymatic reaction, the two the stage biological enzymolysis of enzyme digestion reaction I and fiber separation
Tieing up quality is：Brightness（Whiteness）53-60%, hardness 13-26K, folding strength 30-55 times, tear index 3.5-5.5 mN ﹒ m2/ g resists
Tensile index 50.5-62.0 N ﹒ m/g.
The present invention also provides the purposes of the wheat straw waste fiber, can be used as wheat straw paper, wheat straw carbon, wheat straw fiber cement base
The making raw material of composite material, wheat straw fiber tableware, wheat straw fiber article.
A kind of paper, it is characterised in that contain 1%~99% in the paper of gained（It is preferred that 10%~99%）The present invention
Wheat straw fiber prepared by wheat straw fiber or the method for the invention.The paper includes：Writing paper（Including typing paper,
Kent, rice paper, a kind of writing paper, writing paper made from bamboo, writing paper, single side writing paper（Glazed paper）, drawing paper, watercolour paper, sketch drawing paper,
Charcoal drawing paper, double red paper, laid writing paper, folio paper, writing paper made from bamboo, fine paper made from bamboo, skin drawing paper, water writing paper, oil painting uncoated paper, blotting
Paper, plum paper）, duplication paper（Including translucent drawing paper, stylus waxing paper, dry method electro-photographic paper, blueprint body paper, dry method diazonium
Sensitive paper, duplicating original paper, typewriter manifold paper, no carbon required, two low primitive paper, xerography translucent drawing paper, stencil paper body paper,
Mimeograph paper, stencil paper lining paper, thermography paper, electrostatic plate-making paper, no carbon required, computerized print body paper）, sanitary paper
（Including sanitary napkin, crepe toilet paper, diaper paper, thin non-woven fabric, the paper that kills mouse, plaster paper, absorbent cotton paper, water-soluble medicinal chart, paper handkerchief
Paper, hygenic towelette paper）, paper for daily use（Including model board, braiding body paper, paper shoe-pad, black photograph paperboard, table top paper, Dai Buzhi,
Kitchen paper, powder paper, lens wiping paper, petticoat paper）, decoration paper（Including applique facial tissue, applique lining paper, glazed paper, decorating base paper,
Waxy luster body paper, hanging raw stock, plastic coated wall paper, wrinkle body paper, adhesive sticker body paper, plastics note facial tissue plate, gypsum wallboard, bottom paper,
Overlay paper, ceramic membrane decal paper, ceramic membrane applique lining paper, metal decal paper, metal applique lining paper, enamel decal paper etc.）、
Newsprint, boxboard, art paper, offset paper, typographic printing paper, straw board, white board, bookbinding cardboard, calcium the first day of the lunar month paper, brown paper, glass
Paper, flat envelope, plate paper, cast-coated paper, solid matte paper, coating paper, wood-free paper, boxboard, map paper, ledger paper, paperboard, corrugation
Paper, wrapping paper, moistureproof paper.Any one in art paper or arbitrary two kinds or arbitrary two or more combination.
A kind of wheat straw fiber tableware, it is characterised in that contain 1%~99% in the paper of gained（It is preferred that 10%~99%）'s
Wheat straw fiber prepared by the wheat straw fiber or the method for the invention of the present invention.
The wheat straw fiber tableware includes：Cup, disk, bowl, basin, bucket, dish, pallet, cutlery box.
A kind of wheat straw fiber article, it is characterised in that contain 1%~99% in the paper of gained（It is preferred that 10%~99%）'s
Wheat straw fiber prepared by the wheat straw fiber or the method for the invention of the present invention.
The wheat straw fiber article includes：Interior decoration version, molding seedling-raising cup, molding combination shelf, molding backing plate, mould
Mould bracket, molding medical tray container, medical sheet, medical bed mattress, disposable nursing materials, toilet seat pad.
" adjusting pH value with alkali " of the present invention, alkali refers to NaOH or KOH or Ca (OH)2Or ammonium hydroxide.The alkali ability
Field technique personnel can select as needed, such as NaOH, KOH, Ca (OH)2、NH3、CH3CH2ONa and its aqueous solution or alcohol
The strong base weak acid of alkalinity is presented in solution and ammonium hydroxide, sodium carbonate, sodium bicarbonate, sodium phosphate, disodium hydrogen phosphate etc. in aqueous solution
Salt；Further include buffer solution of the pH value in range of the present invention, such as disodium hydrogen phosphate-sodium hydrate buffer solution, boric acid-boron
Sand buffer solution, Glycine-NaOH buffer solution, borax-sodium hydrate buffer solution, sodium carbonate-bicarbonate buffer solution etc..
" under the conditions of natural pH " of the present invention, refers to pH value not being adjusted in reaction process.
The present invention is more complicated, and the content of specification is only described in detail inventive point of the present invention.Part not in the detailed description of the invention
The prior art can be used.
The advantageous effect that wheat straw fiber is produced by this biological enzyme is：（1）Production process is black without high temeperature chemistry boiling
Liquid generates,（2）Fiber quality（Length, whiteness, short fibre content etc.）It is substantially better than the quality of traditional chemical slurrying,（3）It must starch
Rate improves 25% or more than traditional chemical slurrying rate,（4）The water consume of production process, energy consumption than traditional chemical slurrying reduce by 30% with
On.
Description of the drawings
Fig. 1 is that the process flow chart of production stalk fibre occurs for the biological enzyme of the present invention.
Specific implementation mode
The brightness of the wheat straw waste fiber of the present invention（Whiteness）Using GB/T 8940.2-2002；GB/T7974-2202's
Examination criteria and method." brightness " and " whiteness " is identical concept.
The hardness of the wheat straw waste fiber of the present invention is that permanganate number uses GB/T 1547-2004 examination criterias and side
Method.
The folding strength of the wheat straw waste fiber of the present invention is using 6.5 examination criterias and method in GB/T 24323-2009.
The tear index of the wheat straw waste fiber of the present invention uses 6.2 examination criterias and side in GB/T 24323-2009
Method.
The tensile index of the wheat straw waste fiber of the present invention uses 6.1 examination criterias and side in GB/T 24323-2009
Method.
The present invention is realized by following measures：A kind of wheat straw defibering processes, include the following steps：
First stage：Pretreatment of raw material
It is 3-5cm, after cleaning by wheat straw raw material chopping, is put into enzymolysis reactor, enzymolysis reactor can be batch reactor,
Can be flow reactor, solid-to-liquid ratio 1:2-10（It is preferred that 1：3-6）.
Second stage：Enzymatic reaction
This stage is mainly to remove the protective layer on plant wheat straw surface and open some to link tissues.Complex enzyme I, heating is added
And maintain temperature at 80-120 DEG C（It is preferred that 90-100 DEG C）, the uniform stirring in intermittently or serially enzymolysis reactor adjusts with alkali
PH value, reaction period maintain pH 9-13（It is preferred that pH11-12）, the acidic materials generated in wheat straw heating process are neutralized, remain multiple
The high activity pH ranges of synthase I.Complex enzyme I is mainly made of alkaline high temperature enzyme, including alpha-amylase, alkaline high temperature xylan
Enzyme fits the requirement of reaction temperature, pH, time and response intensity according to enzyme according to the sequencing of cleavage site, big with enzyme activity
It is radix in 80000U/g, the mass number that conversion ton wheat straw raw material adds various enzymes is：Alpha-amylase 20-50g, high temperature wood are poly-
Carbohydrase 20-60g.Reaction time 60-150min.
Phase III：Enzyme digestion reaction I
This stage main decomposition lignin and the connection for cutting off lignin and its hetero-organization.It is completed in second stage enzymatic reaction
Afterwards, under natural ph, Complex Ⅱ is added, stirs evenly, temperature maintains 70-100 DEG C（It is preferred that 85-95 DEG C）.Complex enzyme
II mainly by the enzyme group that connects between the enzyme of decomposition lignin and cut-out lignin and cellulose, hemicellulose and other components
At, according to the sequencing of cleavage site, the requirement of reaction temperature, pH, time and response intensity is fitted according to enzyme, it is big with enzyme activity
It is radix in 80000U/g, the mass number that conversion ton wheat straw raw material adds various enzymes is：High-temperature xylanase 20-180g, high temperature
Alkaline pectase 20-100g, alpha-amylase 20-100g realize to cooperate with the degradation of peroxidase in enzymolysis liquid
Generate H2O2Oxidative function, realized by following two approach,（1）Directly add H2O2, H is added with ton wheat straw2O2（With folding
Pure 100% meter）Mass number be 20-80kg.（2）One or more groups of electrodes, DC voltage 12V, cathode electricity are installed in enzymolysis liquid
Current density is 30-200A/m2, electrochemical reaction occurs under conditions of cathode is aerobic and obtains H2O2.Phase III enzyme digestion reaction
I reaction time is 40-120min.
Fourth stage：Enzyme digestion reaction II
This stage continues to decompose lignin and cuts off the connection of lignin and its hetero-organization.It is completed in phase III enzyme digestion reaction I
Afterwards, it is cooled to 40-80 DEG C（50-70 DEG C of preferable temperature）, under the conditions of natural pH, complex enzyme III is added, stirs evenly, complex enzyme
III is mainly made of the enzyme connected between the enzyme of decomposition lignin and cut-out lignin and cellulose, hemicellulose, according to cutting
The sequencing in site fits the requirement of reaction temperature, pH, time and response intensity according to enzyme, is more than 80000U/g with enzyme activity
For radix, the mass number that conversion ton wheat straw raw material adds various enzymes is：Neutral laccase 70-400g, carbohydrase 8-120g, xylan
Enzyme 10-160g, lipase 8-80g, reaction time 40-120min.
5th stage：Enzyme digestion reaction III
This stage continues to decompose lignin and cuts off the connection of lignin and its hetero-organization.It is completed in fourth stage enzyme digestion reaction II
Afterwards, it is cooled to 30-60 DEG C（40-50 DEG C of preferable temperature）, under the conditions of natural pH, complex enzyme IV is added, stirs evenly, complex enzyme
IV is mainly made of the enzyme connected between the enzyme of decomposition lignin and cut-out lignin and cellulose, hemicellulose, according to cutting
The sequencing in site fits the requirement of reaction temperature, pH, time and response intensity according to enzyme, is more than 50000U/g with enzyme activity
For radix, the mass number that conversion ton wheat straw raw material adds various enzymes is：Neutral laccase 60-350g, lipase 15-200g, wood are poly-
Carbohydrase 30-180g, pectase 12-140g, mannase 20-240g, reaction time 180-600min.
6th stage：Fiber separation
It after the enzymatic of above-mentioned different phase and enzyme digestion reaction, will be separated by solid-liquid separation by staple extrusion equipment, solid content is to plant
The wheat straw waste fiber of object true qualities；Liquid portion is enzymolysis waste liquid, from wherein isolating lignin product.
After the existing pulping process technical finesses such as this fiber can be discongested through fluffer, pressurized screen filters, obtain fine
Plant fiber material.
By pretreatment of raw material, enzymatic reaction, enzyme digestion reaction I, enzyme digestion reaction II, this four-stage biology of enzyme digestion reaction III
It digests, wheat straw waste fiber quality can reach after fiber separation：Brightness（Whiteness）55-75%, hardness 8-22K, folding strength 38-
75 times, tear index 3.3-5.0 mN ﹒ m2/ g, tensile index 45.0-60.0 N ﹒ m/g.
By pretreatment of raw material, enzymatic reaction, enzyme digestion reaction I, these three the stage biological enzymolysis of enzyme digestion reaction II and fiber
Pretreatment of raw material is passed through in separation, enzymatic reaction, enzyme digestion reaction I, these three the stage biological enzymolysis of enzyme digestion reaction III and fiber point
From or pass through pretreatment of raw material, wheat straw waste is fine after enzymatic reaction, the two the stage biological enzymolysis of enzyme digestion reaction I and fiber separation
Tieing up quality is：Brightness（Whiteness）53-60%, hardness 13-26K, folding strength 30-55 times, tear index 3.5-5.5 mN ﹒ m2/ g resists
Tensile index 50.5-62.0 N ﹒ m/g.
The present invention is more complicated.The application is only discussed in detail inventive point, and part not in the detailed description of the invention can be used
The prior art.
Embodiment 1
It is 3-5cm, after cleaning by the chopping of wheat stalk raw material, is put into enzymolysis reactor, solid-to-liquid ratio 1:4, complex enzyme I is added, rises
Temperature simultaneously maintains temperature at 80 DEG C, the uniform stirring in enzymolysis reactor, and pH value is adjusted with NaOH, and the reaction period maintains pH12, in
With the high activity pH ranges of the acidic materials and maintenance complex enzyme I that are generated in stalk heating process.Complex enzyme I is with enzyme activity
80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：Alpha-amylase 40g, alkaline high-temperature xylanase
44g, reaction time 150min.Complex Ⅱ is added later, stirs evenly, temperature maintains 70 DEG C.Complex Ⅱ is with enzyme activity
80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：High-temperature xylanase 80g, high-temperature alkaline pectase
60g, alpha-amylase 60g directly add H to cooperate with the degradation of peroxidase in enzymolysis liquid2O2, with ton stalk
Add H2O2（In terms of pure 100%）Mass number be 60kg, maintain reaction time 120min.It, will again by staple extrusion equipment
Enzymolysis liquid squeezes out, and fiber is discongested through fluffer, fine plant fiber material is obtained by filtration in pressurized screen.Wheat straw waste fiber quality
It can reach：Brightness（Whiteness）57%, hardness 22K, folding strength 39 times, tear index 4.2mN ﹒ m2/ g, 61 N ﹒ m/ of tensile index
g.Gained wheatgrass cellulose, it is intact with the wheat straw waste fiber length that enzyme molecule directional cutting detaches, it overcomes traditional
Length of schooling slurry in fiber fines be destroyed as a result, length-weight average 1.02mm, quality-weight average 1.45mm.
Embodiment 2
It is 3-5cm, after cleaning by the chopping of wheat stalk raw material, is put into enzymolysis reactor, solid-to-liquid ratio 1:4, complex enzyme I is added, rises
Temperature simultaneously maintains temperature at 95 DEG C, the uniform stirring in enzymolysis reactor, and pH value is adjusted with NaOH, and the reaction period maintains pH12, in
With the high activity pH ranges of the acidic materials and maintenance complex enzyme I that are generated in stalk heating process.Complex enzyme I is with enzyme activity
80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：Alpha-amylase 40g, alkaline high-temperature xylanase
44g, reaction time 120min.Complex Ⅱ is added later, stirs evenly, temperature maintains 95 DEG C.Complex Ⅱ is with enzyme activity
80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：High-temperature xylanase 80g, high-temperature alkaline pectase
60g, alpha-amylase 60g directly add H to cooperate with the degradation of peroxidase in enzymolysis liquid2O2, with ton stalk
Add H2O2（In terms of pure 100%）Mass number be 60kg, maintain reaction time 60min.It is cooled to 65 DEG C later, is added compound
Enzyme III, stirs evenly, and for complex enzyme III using enzyme activity 80000U/g as radix, conversion ton stalk adds the mass number of various enzymes
For：Neutral laccase 240g, carbohydrase 64g, zytase 60g, lipase 45g, reaction time 90min.Pass through fiber extrusion again
Equipment squeezes out enzymolysis liquid, and fiber is discongested through fluffer, fine plant fiber material is obtained by filtration in pressurized screen.Wheat straw waste
Fiber quality can reach：Brightness（Whiteness）59%, hardness 18K, folding strength 45 times, tear index 4.4mN ﹒ m2/ g, tensile index
58 N ﹒ m/g.Gained wheatgrass cellulose, it is intact with the wheat straw waste fiber length that enzyme molecule directional cutting detaches, it overcomes
In traditional chemical slurrying fiber fines be destroyed as a result, length-weight average 0.95mm, quality-weight average 1.40mm.
Embodiment 3
It is 3-5cm, after cleaning by the chopping of wheat stalk raw material, is put into enzymolysis reactor, solid-to-liquid ratio 1:4, complex enzyme I is added, rises
Temperature simultaneously maintains temperature at 95 DEG C, the uniform stirring in enzymolysis reactor, adjusts pH value with KOH, the reaction period maintains pH12, neutralizes
The high activity pH ranges of the acidic materials and maintenance complex enzyme I that are generated in stalk heating process.Complex enzyme I is with enzyme activity
80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：Alpha-amylase 40g, alkaline high-temperature xylanase
44g, reaction time 120min.Complex Ⅱ is added later, stirs evenly, temperature maintains 95 DEG C.Complex Ⅱ is with enzyme activity
80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：High-temperature xylanase 80g, high-temperature alkaline pectase
60g, alpha-amylase 60g directly add H to cooperate with the degradation of peroxidase in enzymolysis liquid2O2, with ton stalk
Add H2O2（In terms of pure 100%）Mass number be 60kg, maintain reaction time 60min.It is added after being cooled to 45 DEG C later multiple
Synthase IV, stirs evenly, and using enzyme activity 50000U/g as radix, the mass number of conversion ton stalk addition enzyme is complex enzyme IV：
Neutral laccase 300g, lipase 80g, zytase 120g, pectase 60g, mannase 120g, reaction time 480min,
Again by staple extrusion equipment, enzymolysis liquid is squeezed out, fiber is discongested through fluffer, fine plant fiber is obtained by filtration in pressurized screen
Raw material.Wheat straw waste fiber quality can reach：Brightness（Whiteness）68%, hardness 14K, folding strength 68 times, tear index 4.4mN ﹒
m2/ g, 60 N ﹒ m/g of tensile index.Gained wheatgrass cellulose is protected with the wheat straw waste fiber length of enzyme molecule directional cutting separation
It deposits intact, overcomes that fiber fines in traditional chemical slurrying are destroyed as a result, length-weight average 0.93mm, quality-weight
Average 1.38mm.
Embodiment 4
It is 3-5cm, after cleaning by the chopping of wheat stalk raw material, is put into enzymolysis reactor, solid-to-liquid ratio 1:4, complex enzyme I is added, rises
Temperature simultaneously maintains temperature at 95 DEG C, the uniform stirring in enzymolysis reactor, and pH value is adjusted with NaOH, and the reaction period maintains pH12, in
With the high activity pH ranges of the acidic materials and maintenance complex enzyme I that are generated in stalk heating process.Complex enzyme I is with enzyme activity
80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：Alpha-amylase 40g, alkaline high-temperature xylanase
44g, reaction time 120min.Complex Ⅱ is added later, stirs evenly, temperature maintains 95 DEG C.Complex Ⅱ is with enzyme activity
80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：High-temperature xylanase 80g, high-temperature alkaline pectase
60g, alpha-amylase 60g directly add H to cooperate with the degradation of peroxidase in enzymolysis liquid2O2, with ton stalk
Add H2O2（In terms of pure 100%）Mass number be 60kg, maintain reaction time 60min.It is cooled to 65 DEG C later, is added compound
Enzyme III, stirs evenly, and for complex enzyme III using enzyme activity 80000U/g as radix, conversion ton stalk adds the mass number of various enzymes
For：Neutral laccase 240g, carbohydrase 64g, zytase 60g, lipase 45g, reaction time 90min.It is cooled to 45 DEG C later
Complex enzyme IV is added afterwards, stirs evenly, complex enzyme IV is using enzyme activity 50000U/g as radix, the matter of conversion ton stalk addition enzyme
Measuring number is：Neutral laccase 300g, lipase 80g, zytase 120g, pectase 60g, mannase 120g, reaction time
600min.Again by staple extrusion equipment, enzymolysis liquid is squeezed out, fiber is discongested through fluffer, pressurized screen be obtained by filtration it is fine
Plant fiber material, wheat straw waste fiber quality can reach：Brightness（Whiteness）74%, hardness 9K, folding strength 73 times, tearing refers to
Number 4.0mN ﹒ m2/ g, 59 N ﹒ m/g of tensile index.Gained wheatgrass cellulose, it is fine with the wheat straw waste of enzyme molecule directional cutting separation
It is intact to tie up length, overcome it is that fiber fines in traditional chemical slurrying are destroyed as a result, length-weight average 0.93mm,
Quality-weight average 1.42mm.
Embodiment 5
It is 3-5cm, after cleaning by the chopping of wheat stalk raw material, is put into enzymolysis reactor, solid-to-liquid ratio 1:3, complex enzyme I is added, rises
Temperature simultaneously maintains temperature at 80 DEG C, the uniform stirring in enzymolysis reactor, and pH value is adjusted with NaOH, and the reaction period maintains pH11, in
With the high activity pH ranges of the acidic materials and maintenance complex enzyme I that are generated in stalk heating process.Complex enzyme I is with enzyme activity
80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：Alpha-amylase 30g, alkaline high-temperature xylanase
40g, reaction time 90min.Complex Ⅱ is added later, stirs evenly, temperature maintains 85 DEG C, and Complex Ⅱ is with enzyme activity
80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：High-temperature xylanase 140g, high-temperature alkaline pectase
80g, alpha-amylase 40g directly add H to cooperate with the degradation of peroxidase in enzymolysis liquid2O2, with ton stalk
Add H2O2（In terms of pure 100%）Mass number be 50kg, maintain reaction time 40min.It is cooled to 50 DEG C later, is added compound
Enzyme III, stirs evenly, and for complex enzyme III using enzyme activity 80000U/g as radix, conversion ton stalk adds the mass number of various enzymes
For：Neutral laccase 400g, carbohydrase 140g, zytase 180g, lipase 80g, reaction time 120min.It is cooled to 35 later
Complex enzyme IV is added after DEG C, stirs evenly, for complex enzyme IV using enzyme activity 50000U/g as radix, conversion ton stalk adds enzyme
Mass number is：Neutral laccase 350g, lipase 40g, zytase 30g, pectase 140g, mannase 20g, reaction time
180min.Again by staple extrusion equipment, enzymolysis liquid is squeezed out, fiber is discongested through fluffer, pressurized screen be obtained by filtration it is fine
Plant fiber material, wheat straw waste fiber quality can reach：Brightness（Whiteness）58%, hardness 20K, folding strength 42 times, tearing refers to
Number 4.2mN ﹒ m2/ g, 47.6 N ﹒ m/g of tensile index.Gained wheatgrass cellulose, the wheat straw waste detached with enzyme molecule directional cutting
Fiber length is intact, overcomes that fiber fines in traditional chemical slurrying are destroyed as a result, length-weight average
0.95mm, quality-weight average 1.40mm.
Embodiment 6
It is 3-5cm, after cleaning by the chopping of wheat stalk raw material, is put into enzymolysis reactor, solid-to-liquid ratio 1:6, complex enzyme I is added, rises
Temperature simultaneously maintains temperature at 100 DEG C, the uniform stirring in enzymolysis reactor, and pH value is adjusted with KOH, and the reaction period maintains pH11, in
With the high activity pH ranges of the acidic materials and maintenance complex enzyme I that are generated in stalk heating process.Complex enzyme I is with enzyme activity
80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：Alpha-amylase 50g, alkaline high-temperature xylanase
20g, reaction time 150min.Complex Ⅱ is added later, stirs evenly, temperature maintains 100 DEG C, and Complex Ⅱ is with enzyme activity
80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：High-temperature xylanase 20g, high-temperature alkaline pectase
100g, alpha-amylase 100g directly add H to cooperate with the degradation of peroxidase in enzymolysis liquid2O2, with ton straw
Stalk adds H2O2（In terms of pure 100%）Mass number be 20kg, maintain reaction time 100min.It is cooled to 80 DEG C later, is added
Complex enzyme III, stirs evenly, and for complex enzyme III using enzyme activity 80000U/g as radix, conversion ton stalk adds the quality of various enzymes
Number is：Neutral laccase 320g, carbohydrase 6g, zytase 80g, lipase 20g, reaction time 40min.It is cooled to 60 DEG C later
Complex enzyme IV is added afterwards, stirs evenly, complex enzyme IV is using enzyme activity 50000U/g as radix, the matter of conversion ton stalk addition enzyme
Measuring number is：Neutral laccase 60g, lipase 200g, zytase 180g, pectase 30g, mannase 240g, reaction time
240min.Again by staple extrusion equipment, enzymolysis liquid is squeezed out, fiber is discongested through fluffer, pressurized screen be obtained by filtration it is fine
Plant fiber material, wheat straw waste fiber quality can reach：Brightness（Whiteness）68%, hardness 13K, folding strength 65 times, tearing refers to
Number 3.6mN ﹒ m2/ g, 46.1 N ﹒ m/g of tensile index.Gained wheatgrass cellulose, the wheat straw waste detached with enzyme molecule directional cutting
Fiber length is intact, overcomes that fiber fines in traditional chemical slurrying are destroyed as a result, length-weight average
1.05mm, quality-weight average 1.35mm.
Embodiment 7
It is 3-5cm, after cleaning by the chopping of wheat stalk raw material, is put into enzymolysis reactor, solid-to-liquid ratio 1:8, complex enzyme I is added, rises
Temperature simultaneously maintains temperature at 115 DEG C, the uniform stirring in enzymolysis reactor, with Ca (OH)2PH value is adjusted, the reaction period maintains
PH12 neutralizes the acidic materials generated in stalk heating process and maintains the high activity pH ranges of complex enzyme I.Complex enzyme I with
Enzyme activity 80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：Alpha-amylase 20g, alkaline high temperature wood are poly-
Carbohydrase 60g, reaction time 60min.Complex Ⅱ is added later, stirs evenly, temperature maintains 95 DEG C, and Complex Ⅱ is with enzyme activity
80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：High-temperature xylanase 180g, high-temperature alkaline pectase
20g, alpha-amylase 20g directly add H to cooperate with the degradation of peroxidase in enzymolysis liquid2O2, with ton stalk
Add H2O2（In terms of pure 100%）Mass number be 80kg, maintain reaction time 120min.It is added after being cooled to 60 DEG C later multiple
Synthase IV, stirs evenly, and using enzyme activity 50000U/g as radix, the mass number of conversion ton stalk addition enzyme is complex enzyme IV：
Neutral laccase 260g, lipase 80g, zytase 90g, pectase 17g, mannase 60g, reaction time 360min.Again
By staple extrusion equipment, enzymolysis liquid is squeezed out, it is former that fiber is discongested through fluffer, fine plant fiber is obtained by filtration in pressurized screen
Material, wheat straw waste fiber quality can reach：Brightness（Whiteness）71%, hardness 10K, folding strength 72 times, tear index 3.5mN ﹒
m2/ g, 45.6 N ﹒ m/g of tensile index.Gained wheatgrass cellulose, it is characterised in that the wheat straw straw detached with enzyme molecule directional cutting
Stalk fiber length is intact, overcomes that fiber fines in traditional chemical slurrying are destroyed as a result, length-weight average
0.91mm, quality-weight average 1.33mm.
Embodiment 8
It is 3-5cm, after cleaning by the chopping of wheat stalk raw material, is put into enzymolysis reactor, solid-to-liquid ratio 1:4, complex enzyme I is added, rises
Temperature simultaneously maintains temperature at 95 DEG C, the uniform stirring in enzymolysis reactor, and pH value is adjusted with NaOH, and the reaction period maintains pH12, in
With the high activity pH ranges of the acidic materials and maintenance complex enzyme I that are generated in stalk heating process.Complex enzyme I is with enzyme activity
80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：Alpha-amylase 40g, alkaline high-temperature xylanase
44g, reaction time 120min.Complex Ⅱ is added later, stirs evenly, temperature maintains 95 DEG C.Complex Ⅱ is with enzyme activity
80000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：High-temperature xylanase 80g, high-temperature alkaline pectase
60g, alpha-amylase 60g install 4 groups of electrodes, DC voltage to cooperate with the degradation of peroxidase in enzymatic vessel
12V, cathode-current density 80A/m2, electrochemical reaction occurs under conditions of cathode is passed through pure oxygen and obtains H2O2, remain anti-
150min between seasonable.It is cooled to 65 DEG C later, complex enzyme III is added, stirs evenly, complex enzyme III is using enzyme activity 80000U/g as base
Number, the mass number that conversion ton stalk adds various enzymes are：Neutral laccase 240g, carbohydrase 64g, zytase 60g, fat
Enzyme 45g, reaction time 90min.Complex enzyme IV is added after being cooled to 45 DEG C later, stirs evenly, complex enzyme IV is with enzyme activity
50000U/g is radix, and the mass number of conversion ton stalk addition enzyme is：Neutral laccase 300g, lipase 80g, zytase
120g, pectase 60g, mannase 120g, reaction time 480min.Again by staple extrusion equipment, enzymolysis liquid is squeezed out,
Fiber is discongested through fluffer, fine plant fiber material is obtained by filtration in pressurized screen, and wheat straw waste fiber quality can reach：It is bright
Degree（Whiteness）60%, hardness 18K, folding strength 41 times, tear index 4.2mN ﹒ m2/ g, 58 N ﹒ m/g of tensile index.Gained wheat straw is fine
Dimension element, it is intact with the wheat straw waste fiber length that enzyme molecule directional cutting detaches, it overcomes tiny in traditional chemical slurrying
It is that fiber is destroyed as a result, length-weight average 1.02mm, quality-weight average 1.35mm.
Embodiment 9
Other with embodiment 8, the difference is that：
To cooperate with the degradation of peroxidase, 8 groups of electrodes, DC voltage 12V, cathode-current density are installed in enzymatic vessel
For 30A/m2, electrochemical reaction occurs under conditions of cathode is passed through pure oxygen and obtains H2O2, maintain reaction time 120min.Wheat
Careless stalk fibre quality can reach：Brightness（Whiteness）56%, hardness 19K, folding strength 39 times, tear index 4.2mN ﹒ m2/ g resists
59 N ﹒ m/g of tensile index.Gained wheatgrass cellulose, it is intact with the wheat straw waste fiber length that enzyme molecule directional cutting detaches,
It overcomes that fiber fines in traditional chemical slurrying are destroyed as a result, length-weight average 1.02mm, quality-weight average
1.40mm。
Embodiment 10
Other with embodiment 8, the difference is that：
To cooperate with the degradation of peroxidase, 1 group of electrode, DC voltage 12V, cathode-current density are installed in enzymatic vessel
For 200A/m2, electrochemical reaction occurs under conditions of cathode is passed through pure oxygen and obtains H2O2, maintain reaction time 30min.It is multiple
Using enzyme activity 80000U/g as radix, the mass number that conversion ton stalk adds various enzymes is synthase III：Neutral laccase 500g, sugar
Change enzyme 8g, zytase 140g, lipase 6g, wheat straw waste fiber quality can reach：Brightness（Whiteness）54%, hardness 20K,
Folding strength 36 times, tear index 4.1mN ﹒ m2/ g, 57 N ﹒ m/g of tensile index.Gained wheatgrass cellulose is cut with enzyme molecule orientation
The wheat straw waste fiber length for cutting separation is intact, overcomes that fiber fines in traditional chemical slurrying are destroyed as a result, long
Degree-weight average 1.00mm, quality-weight average 1.39mm.
Embodiment 11
Other with embodiment 8, the difference is that：
To cooperate with the degradation of peroxidase, 2 groups of electrodes, DC voltage 12V, cathode-current density are installed in enzymatic vessel
For 50A/m2, electrochemical reaction occurs under conditions of cathode is passed through pure oxygen and obtains H2O2, maintain reaction time 100min.It is multiple
Using enzyme activity 80000U/g as radix, the mass number that conversion ton stalk adds various enzymes is synthase III：Neutral laccase 70g, sugar
Change enzyme 120g, zytase 10g, lipase 100g.Using enzyme activity 50000U/g as radix, conversion ton stalk adds complex enzyme IV
Enzyme mass number is：Neutral laccase 400g, lipase 20g, zytase 25g, pectase 150g, mannase 15g.Wheat
Careless stalk fibre quality can reach：Brightness（Whiteness）58%, hardness 17K, folding strength 40 times, tear index 4.2mN ﹒ m2/ g resists
59 N ﹒ m/g of tensile index.Gained wheatgrass cellulose, it is intact with the wheat straw waste fiber length that enzyme molecule directional cutting detaches,
It overcomes that fiber fines in traditional chemical slurrying are destroyed as a result, length-weight average 1.05mm, quality-weight average
1.41mm。
Embodiment 12
Other with embodiment 8, the difference is that：
Using enzyme activity 80000U/g as radix, the mass number of conversion ton stalk addition enzyme is complex enzyme I：Alpha-amylase 60g,
Alkaline high-temperature xylanase 80g, reaction the period maintain pH10,90 DEG C, reaction time 40min.
Using enzyme activity 80000U/g as radix, the mass number of conversion ton stalk addition enzyme is Complex Ⅱ：High temperature wood is poly-
Carbohydrase 200g, high-temperature alkaline pectase 120g, alpha-amylase 120g.
To cooperate with the degradation of peroxidase, 8 groups of electrodes, DC voltage 12V, cathode current are installed in enzymatic vessel
Density is 120A/m2, electrochemical reaction occurs under conditions of cathode is passed through pure oxygen and obtains H2O2, maintain the reaction time
80min。
Using enzyme activity 80000U/g as radix, the mass number that conversion ton stalk adds various enzymes is complex enzyme III：It is neutral
Laccase 120g, carbohydrase 120g, zytase 40g, lipase 60g, reaction time 150min.
Using enzyme activity 50000U/g as radix, the mass number of conversion ton stalk addition enzyme is complex enzyme IV：Neutral laccase
50g, lipase 230g, zytase 200g, pectase 10g, mannase 260g, reaction time 720min.
Wheat straw waste fiber quality can reach：Brightness（Whiteness）61%, hardness 15K, folding strength 47 times, tear index
5.4mN ﹒ m2/ g, 56 N ﹒ m/g of tensile index.Gained wheatgrass cellulose, the wheat straw waste fiber detached with enzyme molecule directional cutting
Length is intact, overcomes that fiber fines in traditional chemical slurrying are destroyed as a result, length-weight average 1.01mm, matter
Amount-weight average 1.38mm.
Claims (16)
1. a kind of wheatgrass cellulose, it is characterised in that with the stalk fibre that enzyme molecule directional cutting detaches, length-weight average is fine
Tie up length 0.80-1.10mm, quality-weight average fiber length 1.20-1.50mm.
2. a kind of wheat straw waste fiber, the wheat straw waste fiber is the fiber for including wheatgrass cellulose described in claim 1
Structure.
3. wheat straw waste fiber as claimed in claim 2, which is characterized in that wheat straw waste fiber quality reaches：Brightness >=
53%, hardness 8-26K；Folding strength >=30 time, the mN ﹒ m of tear index >=3.32/ g, the N ﹒ m/g of tensile index >=45.0.
4. wheat straw waste fiber as claimed in claim 2 or claim 3, which is characterized in that wheat straw waste fiber quality reaches：Brightness
（Whiteness）53-75%, hardness 8-26K, folding strength 30-75 times, tear index 3.3-5.5 mN ﹒ m2/ g, tensile index 45.0-
62.0 N ﹒ m/g.
5. a kind of wheat straw defibering processes, including enzymatic reaction, enzyme digestion reaction I, enzyme digestion reaction II, enzyme digestion reaction III and fiber
One or multi-step reaction in separating step, which is characterized in that the technique is selected from one of following A, B, C or D：
A, a kind of wheat straw defibering processes, including enzymatic reaction, enzyme digestion reaction I, enzyme digestion reaction II, enzyme digestion reaction III and fiber
Separating step：
1）Enzymatic reaction
Complex enzyme I is added in wheat straw raw material, heats up and maintains temperature at 80-120 DEG C, in intermittently or serially enzymolysis reactor
Even stirring, reaction period maintain pH 9-13, reaction time 40-200min；
2）Enzyme digestion reaction I
After the completion of enzymatic reaction, Complex Ⅱ is added, stirs evenly, temperature maintains 70-100 DEG C；When the reaction of enzyme digestion reaction I
Between be 20-220min；
3）Enzyme digestion reaction II
After the completion of enzyme digestion reaction I, it is cooled to 40-80 DEG C, complex enzyme III is added, stirs evenly, reaction time 30-150min；
4）Enzyme digestion reaction III
After the completion of enzyme digestion reaction II, it is cooled to 30-60 DEG C, complex enzyme IV is added, stirs evenly, reaction time 120-720min；
5）Fiber separation
It after the enzymatic of above-mentioned different phase and enzyme digestion reaction, will be separated by solid-liquid separation by staple extrusion equipment, solid content is to plant
The wheat straw waste fiber of object true qualities；Liquid portion is enzymolysis waste liquid, from wherein isolating lignin product；Or：
B, a kind of wheat straw defibering processes, including enzymatic reaction, enzyme digestion reaction I, enzyme digestion reaction II and fiber separation step：
1）Enzymatic reaction
Complex enzyme I is added in wheat straw raw material, heats up and maintains temperature at 80-120 DEG C, in intermittently or serially enzymolysis reactor
Even stirring, reaction period maintain pH 9-13, reaction time 40-200min；
2）Enzyme digestion reaction I
After the completion of enzymatic reaction, Complex Ⅱ is added, stirs evenly, temperature maintains 70-100 DEG C；When the reaction of enzyme digestion reaction I
Between be 20-220min；
3）Enzyme digestion reaction II
After the completion of enzyme digestion reaction I, it is cooled to 40-80 DEG C, complex enzyme III is added, stirs evenly, reaction time 30-150min；
5）Fiber separation
It after the enzymatic of above-mentioned different phase and enzyme digestion reaction, will be separated by solid-liquid separation by staple extrusion equipment, solid content is to plant
The wheat straw waste fiber of object true qualities；Liquid portion is enzymolysis waste liquid, from wherein isolating lignin product；Or；
C, a kind of wheat straw defibering processes, including above-mentioned enzymatic reaction, enzyme digestion reaction I, enzyme digestion reaction III and fiber separation step
Suddenly：
1）Enzymatic reaction
Complex enzyme I is added in wheat straw raw material, heats up and maintains temperature at 80-120 DEG C, in intermittently or serially enzymolysis reactor
Even stirring, reaction period maintain pH 9-13, reaction time 40-200min；
2）Enzyme digestion reaction I
After the completion of enzymatic reaction, Complex Ⅱ is added, stirs evenly, temperature maintains 70-100 DEG C；When the reaction of enzyme digestion reaction I
Between be 20-220min；
4）Enzyme digestion reaction III
After the completion of enzyme digestion reaction II, it is cooled to 30-60 DEG C, complex enzyme IV is added, stirs evenly, reaction time 120-720min；
5）Fiber separation
It after the enzymatic of above-mentioned different phase and enzyme digestion reaction, will be separated by solid-liquid separation by staple extrusion equipment, solid content is to plant
The wheat straw waste fiber of object true qualities；Liquid portion is enzymolysis waste liquid, from wherein isolating lignin product；Alternatively,
D, a kind of wheat straw defibering processes, including above-mentioned enzymatic reaction, enzyme digestion reaction I and fiber separation step,
1）Enzymatic reaction
Complex enzyme I is added in wheat straw raw material, heats up and maintains temperature at 80-120 DEG C, in intermittently or serially enzymolysis reactor
Even stirring, reaction period maintain pH 9-13, reaction time 40-200min；
2）Enzyme digestion reaction I
After the completion of enzymatic reaction, Complex Ⅱ is added, stirs evenly, temperature maintains 70-100 DEG C；When the reaction of enzyme digestion reaction I
Between be 20-220min；
5）Fiber separation
It after the enzymatic of above-mentioned different phase and enzyme digestion reaction, will be separated by solid-liquid separation by staple extrusion equipment, solid content is to plant
The wheat straw waste fiber of object true qualities；Liquid portion is enzymolysis waste liquid, from wherein isolating lignin product.
6. the wheat straw defibering processes as claimed in claim 5, which is characterized in that further include pretreatment of raw material；It is described
Pretreatment of raw material is：It is 3-5cm, after cleaning by wheat straw raw material chopping, is put into enzymolysis reactor；
The enzymolysis reactor is batch reactor or flow reactor, solid-to-liquid ratio 1:2-10, it is furthermore preferred that solid-to-liquid ratio is 1：
3-6。
7. the wheat straw defibering processes as described in described in claim 5 or 6, which is characterized in that step 1）The complex enzyme
I, 80000U/g is more than as radix using enzyme activity, the mass number that conversion ton wheat straw raw material adds various enzymes is：Alpha-amylase 20-
60g；Alkaline high-temperature xylanase 20-80g；It is furthermore preferred that the complex enzyme I, conversion ton wheat straw raw material adds the matter of various enzymes
Measuring number is：Alpha-amylase 20-50g, alkaline high-temperature xylanase 20-60g；
Step 2）Complex Ⅱ in enzyme digestion reaction I is more than 80000U/g as radix using enzyme activity, and conversion ton wheat straw raw material addition is each
The mass number of kind of enzyme is：High-temperature xylanase 20-200g, high-temperature alkaline pectase 20-120g, alpha-amylase 20-120g；It is excellent
Choosing, Complex Ⅱ is more than 80000U/g as radix using enzyme activity, and the mass number that conversion ton wheat straw raw material adds various enzymes is：It is high
Warm zytase 20-180g, high-temperature alkaline pectase 20-100g, alpha-amylase 20-100g；
Step 3）Complex enzyme III, 80000U/g is more than as radix using enzyme activity, conversion ton wheat straw raw material adds the quality of various enzymes
Number is：Neutral laccase 60-500g, carbohydrase 6-140g；Zytase 10-180g, lipase 6-100g；Preferably, step 3）
Complex enzyme III, 80000U/g is more than as radix using enzyme activity, conversion ton wheat straw raw material adds the mass numbers of various enzymes and is：Neutrality paint
Enzyme 70-400g, carbohydrase 8-120g, zytase 10-160g, lipase 8-80g；
Step 4）Complex enzyme IV, 50000U/g is more than as radix using enzyme activity, conversion ton wheat straw raw material adds the quality of various enzymes
Number is：Neutral laccase 50-400g, lipase 20-230g, zytase 25-200g, pectase 10-150g, mannase
15-260g；Preferably, step 4）Complex enzyme IV, 50000U/g is more than as radix using enzyme activity, conversion ton wheat straw raw material addition is each
The mass number of kind of enzyme is：Neutral laccase 60-350g, lipase 15-200g, zytase 30-180g, pectase 12-140g are sweet
Reveal dextranase 20-240g.
8. the wheat straw defibering processes as described in claim 5 ~ 7 any one of them, which is characterized in that step 1）Middle maintenance temperature
Degree is at 90-100 DEG C, the uniform stirring in intermittently or serially enzymolysis reactor, adjusts pH value with alkali, the reaction period maintains pH value
11-12, reaction time 60-150min.
9. the wheat straw defibering processes as described in claim 5 ~ 8 any one of them, which is characterized in that step 2）Enzyme digestion reaction
I is the degradation for cooperateing with peroxidase, is realized in enzymolysis liquid and generates H2O2Oxidative function, pass through following two approach
It realizes,（1）Directly add H2O2, H is added with ton wheat straw2O2Mass number be 20-100kg；Preferably, it is added with ton wheat straw
H2O2Mass number be 20-80kg；2）One or more groups of electrodes, DC voltage 12V, cathode-current density are installed in enzymolysis liquid
For 30-200A/m2, electrochemical reaction occurs under conditions of cathode is aerobic and obtains H2O2。
10. the wheat straw defibering processes as described in claim 5 ~ 9 any one of them, which is characterized in that step 2）Enzymolysis is anti-
The reaction time for answering I is 30-150min；It is furthermore preferred that step 2）The reaction time of enzyme digestion reaction I is 40-120min.
11. the wheat straw defibering processes as described in claim 5 ~ 10 any one of them, which is characterized in that step 3）It is digesting
After the completion of reaction I, it is cooled to 50-70 DEG C, under the conditions of natural pH, complex enzyme III is added, stirs evenly；Step 3）Reaction when
Between 40-120min.
12. the wheat straw defibering processes as described in claim 5 ~ 11 any one of them, which is characterized in that step 4）It is digesting
After the completion of reaction II, it is cooled to 40-50 DEG C, under the conditions of natural pH, complex enzyme IV is added, stirs evenly；Step 4）Reaction
Time 180-600min.
13. such as the purposes of claim 2 ~ 4 any one of them wheat straw waste fiber, or such as any one of claim 5 ~ 12 institute
The purposes of wheat straw fiber prepared by the method stated, it is fine as wheat straw paper, wheat straw carbon, wheat straw fiber cement-base composite material, wheat straw
Tie up the making raw material of tableware, wheat straw fiber article.
14. a kind of paper, it is characterised in that contain 1%~99% claim 2 ~ 4 any one of them wheat in the paper of gained
Wheat straw waste fiber prepared by careless stalk fibre or claim 5 ~ 12 any one of them method；Preferably, the paper of gained
In contain any one of 10%~99% claim 2 ~ 4 any one of them wheat straw waste fiber or claim 5 ~ 12 institute
Wheat straw waste fiber prepared by the method stated.
15. a kind of wheat straw fiber tableware, it is characterised in that contain 1%~99% claim 2 ~ 4 times in wheat straw fiber tableware
Wheat straw waste fiber prepared by wheat straw waste fiber or claim 5 ~ 12 any one of them method described in one；It is preferred that
, 10%~99% claim 2 ~ 4 any one of them wheat straw waste fiber or right are contained in wheat straw fiber tableware
It is required that wheat straw waste fiber prepared by 5 ~ 12 any one of them methods；
The wheat straw fiber tableware includes：Cup, disk, bowl, basin, bucket, dish, pallet, cutlery box.
16. a kind of wheat straw fiber article, it is characterised in that contain 1%~99% claim 2 ~ 4 times in wheat straw fiber article
Wheat straw waste fiber prepared by wheat straw waste fiber or claim 5 ~ 12 any one of them method described in one；It is preferred that
, 10%~99% claim 2 ~ 4 any one of them wheat straw waste fiber or right are contained in wheat straw fiber article
It is required that wheat straw waste fiber prepared by 5 ~ 12 any one of them methods；
The wheat straw fiber article includes：Interior decoration version, molding seedling-raising cup, molding combination shelf, molding backing plate, molding support
Frame, molding medical tray container, medical sheet, medical bed mattress, disposable nursing materials, toilet seat pad.
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