CN106012636A - Preparation method for enzyme-modified straw paper pulp - Google Patents
Preparation method for enzyme-modified straw paper pulp Download PDFInfo
- Publication number
- CN106012636A CN106012636A CN201610401615.4A CN201610401615A CN106012636A CN 106012636 A CN106012636 A CN 106012636A CN 201610401615 A CN201610401615 A CN 201610401615A CN 106012636 A CN106012636 A CN 106012636A
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- China
- Prior art keywords
- paper pulp
- raw material
- powder
- solution
- water
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Classifications
-
- 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
-
- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
- D21C9/005—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives organic compounds
-
- 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
Abstract
The invention discloses a preparation method for enzyme-modified straw paper pulp. The method is applicable to the straw of herbaceous plants like corn, wheat, paddy rice, Artemisia apiacea and Artemisia apiacea and the straw of crops. According to the invention, raw materials are cheap; and an enzyme hydrolysis method is employed for surface modification of paper pulp to remove colloids, xylan and hemicelluloses in the paper pulp and improve the content of crystalline cellulose, so the mechanical strength of a composite material is improved.
Description
Technical field
The present invention relates to pulp technology for making paper, be specifically related to the preparation method of a kind of enzyme modification straw pulp.
Background technology
The timber resources of China extremely lacks, and paper making raw material bottleneck is particularly thorny.Now, the paper pulp for papermaking is mainly wood pulp, due to China and in the world timber resources worsening shortages, the demand of paper pulp day by day increase, on the premise of not welding and forest, produce the problem that paper pulp and papermaking just become serious.As the scheme of the problem of solution, herbaceous plant and agricultural crop straw papermaking is utilized increasingly to be paid close attention to by people.
The yield of paper pulp raw material material is high, and pulping waste liquor pollutes and is easily handled less, meets the development need of green technology for making paper.But due to the intensity difference of paper pulp raw material, reduce the quality of paper, thus limit its a large amount of uses in papermaking.Existing technology is to improve the intensity of slurry by adding starch in the slurry, but in such method, the retention rate of starch is relatively low, have impact on the lifting of pulp strength.
Additive for paper making is the biggest on the impact of paper quality.Generally additive for paper making does not contains fiber, but the paper toughness produced is inadequate, and paper is more crisp, is easily broken off.A kind of additive for paper making improving paper toughness it is badly in need of, by increasing capacitance it is possible to increase the toughness of paper, it is possible to extend the shelf-life of paper products on market.
Zymotechnic has a wide range of applications in the industry such as food, textile and paper, its main cause be zymotechnic be eco-friendly, meanwhile, zymotechnic has the strongest selectivity, and they only specific reactions of catalysis, without removing or damage other molecules.In addition, the advantage of zymotechnic also has reduced cost, saves the energy and with water, improves properties of product etc..
Summary of the invention
The present invention provides the preparation method of a kind of enzyme modification straw pulp, uses paper pulp prepared by the method, and cost of material is cheap, this paper pulp the paper good mechanical property prepared.
To achieve these goals, the present invention provides the preparation method of a kind of enzyme modification straw pulp, and the method comprises the steps:
(1) agricultural crop straw is utilized to make paper pulp raw material
Crushed stalk, granularity is 100-300 mesh；The process of stalk powder, uses the following method to be:
First stalk powder is soaked more than 5 minutes, reheat and boil 5-15 minute, then filter moisture, it is thus achieved that the raw material of processing machinery slurry, standby；Or
First stalk powder is soaked more than 5 minutes, put in cooking liquor and soak 10-30 minute, reheat and boil 5-15 minute, then filter cooking liquor, it is thus achieved that prepare the raw material of chemical pulp, standby；
Wherein cooking liquor is following composition:
Water and KOH, stalk powder and KOH, the weight ratio of water are 10: 5: 100-300, wherein stalk powder weight refers to the weight of dry straw powder；Or
Water, KOH and K2S.9H2O, stalk powder and KOH, K2S.9H2O, the weight ratio of water are 10: 5: 1: 100-300, and wherein stalk powder weight refers to the weight of dry straw powder；
Stalk powder after processing enters blender stirring with the mineral powder that granularity is 20-30 mesh, and mineral powder uses dolomite or quartz mine；
Mixture water filling after stirring is formed suspension, pours out suspension and separate with mineral powder, then suspension is i.e. obtained paper pulp raw material one time through the sieve screen of 50-100 mesh；
(2) paper pulp raw material solution and compound enzyme are mixed, obtain mixed solution one；With the pH value of buffer solution regulation mixed solution one to 4-5, obtain mixed solution two；In wherein said paper pulp raw material solution, paper pulp fiber is 1:15-1:20 with the mass ratio of water, before described paper pulp raw material solution and compound enzyme mixing, comprises the steps of and paper pulp fiber is soaked in water 1-2h by described；Described buffer solution is citric acid-sodium citrate buffer or NaAc_HAc buffer solution；
(3) described mixed solution two is reacted at 45-50 DEG C 2-5h, before described mixed solution two reacts at 45-50 DEG C, comprise the steps of in described mixed solution two drip disodiumedetate (EDETATE SODIUM) aqueous solution to prevent the formation of metal-enzyme coordination compound, the molar concentration of described disodium ethylene diamine tetra-acetic acid aqueous solution is preferably 1mol/L-2mol/L；
(4) reactant liquor after reaction being terminated carries out the operation of enzyme denaturing, obtains product.
The preparation method of enzyme modification straw pulp of the present invention, it is suitable for herbaceous plant and the agricultural crop straws such as Semen Maydis, Semen Tritici aestivi, Oryza sativa L., Herba Artemisiae Annuae, Herba Artemisiae annuae, low in raw material price, the method using enzyme hydrolysis, paper pulp fiber is carried out surface modification, remove colloid, xylan and the hemi-cellulose components in paper pulp fiber, improve the content of crystalline cellulose, thus improve the mechanical strength of composite.
Detailed description of the invention
Embodiment one
Crushed stalk, granularity is 100 mesh；The process of stalk powder, uses the following method to be: first soaked more than 5 minutes by stalk powder, reheats and boils 5 minutes, then filters moisture, it is thus achieved that the raw material of processing machinery slurry, standby；Or first stalk powder is soaked more than 5 minutes, put in cooking liquor and soak 10 minutes, reheat and boil 5-15 minute, then filter cooking liquor, it is thus achieved that prepare the raw material of chemical pulp, standby.
Wherein cooking liquor is following composition: water and KOH, and stalk powder is 10: 5: 100 with KOH, the weight ratio of water, and wherein stalk powder weight refers to the weight of dry straw powder；Or water, KOH and K2S.9H2O, stalk powder and KOH, K2S.9H2O, the weight ratio of water are 10: 5: 1: 100, and wherein stalk powder weight refers to the weight of dry straw powder.
Stalk powder after processing enters blender stirring with the mineral powder that granularity is 20 mesh, and mineral powder uses dolomite or quartz mine.
Mixture water filling after stirring is formed suspension, pours out suspension and separate with mineral powder, then suspension is i.e. obtained paper pulp raw material one time through the sieve screen of 50 mesh.
Paper pulp raw material solution and compound enzyme are mixed, obtains mixed solution one；With the pH value of buffer solution regulation mixed solution one to 4-5, obtain mixed solution two；In wherein said paper pulp raw material solution, paper pulp fiber is 1:15 with the mass ratio of water, before described paper pulp raw material solution and compound enzyme mixing, comprises the steps of and paper pulp fiber is soaked in water 1h by described；Described buffer solution is citric acid-sodium citrate buffer or NaAc_HAc buffer solution.
Described mixed solution two is reacted at 45 DEG C 2h, before described mixed solution two reacts at 45 DEG C, comprise the steps of in described mixed solution two drip disodiumedetate (EDETATE SODIUM) aqueous solution to prevent the formation of metal-enzyme coordination compound, the molar concentration of described disodium ethylene diamine tetra-acetic acid aqueous solution is preferably 1mol/L；Reactant liquor after reaction being terminated carries out the operation of enzyme denaturing, obtains product.
Embodiment two
Crushed stalk, granularity is 300 mesh；The process of stalk powder, uses the following method to be: first soaked more than 5 minutes by stalk powder, reheats and boils 15 minutes, then filters moisture, it is thus achieved that the raw material of processing machinery slurry, standby；Or first stalk powder is soaked more than 5 minutes, put in cooking liquor and soak 10-30 minute, reheat and boil 5 minutes, then filter cooking liquor, it is thus achieved that prepare the raw material of chemical pulp, standby.
Wherein cooking liquor is following composition: water and KOH, and stalk powder is 10: 5: 300 with KOH, the weight ratio of water, and wherein stalk powder weight refers to the weight of dry straw powder；Or water, KOH and K2S.9H2O, stalk powder and KOH, K2S.9H2O, the weight ratio of water are 10: 5: 1: 300, and wherein stalk powder weight refers to the weight of dry straw powder.
Stalk powder after processing enters blender stirring with the mineral powder that granularity is 30 mesh, and mineral powder uses dolomite or quartz mine.
Mixture water filling after stirring is formed suspension, pours out suspension and separate with mineral powder, then suspension is i.e. obtained paper pulp raw material one time through the sieve screen of 100 mesh.
Paper pulp raw material solution and compound enzyme are mixed, obtains mixed solution one；With the pH value of buffer solution regulation mixed solution one to 4-5, obtain mixed solution two；In wherein said paper pulp raw material solution, paper pulp fiber is 1:20 with the mass ratio of water, before described paper pulp raw material solution and compound enzyme mixing, comprises the steps of and paper pulp fiber is soaked in water 2h by described；Described buffer solution is citric acid-sodium citrate buffer or NaAc_HAc buffer solution.
Described mixed solution two is reacted at 50 DEG C 5h, before described mixed solution two reacts at 50 DEG C, comprise the steps of in described mixed solution two drip disodiumedetate (EDETATE SODIUM) aqueous solution to prevent the formation of metal-enzyme coordination compound, the molar concentration of described disodium ethylene diamine tetra-acetic acid aqueous solution is preferably 2mol/L；Reactant liquor after reaction being terminated carries out the operation of enzyme denaturing, obtains product.
Describing the present invention the most by way of example, but the invention is not restricted to above-mentioned specific embodiment, all any change or modification done based on the present invention belong to the scope of protection of present invention.
Claims (1)
1. a preparation method for enzyme modification straw pulp, the method comprises the steps:
(1) agricultural crop straw is utilized to make paper pulp raw material
Crushed stalk, granularity is 100-300 mesh；The process of stalk powder, uses the following method to be:
First stalk powder is soaked more than 5 minutes, reheat and boil 5-15 minute, then filter moisture, it is thus achieved that the raw material of processing machinery slurry, standby；Or
First stalk powder is soaked more than 5 minutes, put in cooking liquor and soak 10-30 minute, reheat and boil 5-15 minute, then filter cooking liquor, it is thus achieved that prepare the raw material of chemical pulp, standby；
Wherein cooking liquor is following composition:
Water and KOH, stalk powder and KOH, the weight ratio of water are 10: 5: 100-300, wherein stalk powder weight refers to the weight of dry straw powder；Or
Water, KOH and K2S.9H2O, stalk powder and KOH, K2S.9H2O, the weight ratio of water are 10: 5: 1: 100-300, and wherein stalk powder weight refers to the weight of dry straw powder；
Stalk powder after processing enters blender stirring with the mineral powder that granularity is 20-30 mesh, and mineral powder uses dolomite or quartz mine；
Mixture water filling after stirring is formed suspension, pours out suspension and separate with mineral powder, then suspension is i.e. obtained paper pulp raw material one time through the sieve screen of 50-100 mesh；
(2) paper pulp raw material solution and compound enzyme are mixed, obtain mixed solution one；With the pH value of buffer solution regulation mixed solution one to 4-5, obtain mixed solution two；In wherein said paper pulp raw material solution, paper pulp fiber is 1:15-1:20 with the mass ratio of water, before described paper pulp raw material solution and compound enzyme mixing, comprises the steps of and paper pulp fiber is soaked in water 1-2h by described；Described buffer solution is citric acid-sodium citrate buffer or NaAc_HAc buffer solution；
(3) described mixed solution two is reacted at 45-50 DEG C 2-5h, before described mixed solution two reacts at 45-50 DEG C, comprise the steps of in described mixed solution two drip disodiumedetate (EDETATE SODIUM) aqueous solution to prevent the formation of metal-enzyme coordination compound, the molar concentration of described disodium ethylene diamine tetra-acetic acid aqueous solution is preferably 1mol/L-2mol/L；
(4) reactant liquor after reaction being terminated carries out the operation of enzyme denaturing, obtains product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610401615.4A CN106012636A (en) | 2016-06-11 | 2016-06-11 | Preparation method for enzyme-modified straw paper pulp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610401615.4A CN106012636A (en) | 2016-06-11 | 2016-06-11 | Preparation method for enzyme-modified straw paper pulp |
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| Publication Number | Publication Date |
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| CN106012636A true CN106012636A (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610401615.4A Pending CN106012636A (en) | 2016-06-11 | 2016-06-11 | Preparation method for enzyme-modified straw paper pulp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115584652A (en) * | 2022-11-07 | 2023-01-10 | 齐鲁工业大学 | Wheat straw pulping method and product of KOH synergistic biological enzyme preparation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100529251C (en) * | 2006-02-28 | 2009-08-19 | 王军旗 | Method for producing paper pulp utilizing herbal plant, crop stalk and ore powder |
| CN104963206A (en) * | 2014-12-11 | 2015-10-07 | 华东理工常熟研究院有限公司 | Enzyme modified paper pulp fiber, wood-plastic composite material and preparation method thereof |
| WO2016015508A1 (en) * | 2014-07-31 | 2016-02-04 | 南京工业大学 | Straw biomass modification and method of use |
| CN105315689A (en) * | 2014-07-31 | 2016-02-10 | 南京博方生物科技有限公司 | Preparation and use methods for straw-based materials |
-
2016
- 2016-06-11 CN CN201610401615.4A patent/CN106012636A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100529251C (en) * | 2006-02-28 | 2009-08-19 | 王军旗 | Method for producing paper pulp utilizing herbal plant, crop stalk and ore powder |
| WO2016015508A1 (en) * | 2014-07-31 | 2016-02-04 | 南京工业大学 | Straw biomass modification and method of use |
| CN105315689A (en) * | 2014-07-31 | 2016-02-10 | 南京博方生物科技有限公司 | Preparation and use methods for straw-based materials |
| CN104963206A (en) * | 2014-12-11 | 2015-10-07 | 华东理工常熟研究院有限公司 | Enzyme modified paper pulp fiber, wood-plastic composite material and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115584652A (en) * | 2022-11-07 | 2023-01-10 | 齐鲁工业大学 | Wheat straw pulping method and product of KOH synergistic biological enzyme preparation |
| CN115584652B (en) * | 2022-11-07 | 2023-10-24 | 齐鲁工业大学 | Wheat straw pulping method and product by utilizing KOH and biological enzyme preparation |
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Application publication date: 20161012 |
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