CN104441574A - Preparation method of lignin foamed thermoplastic material - Google Patents

Preparation method of lignin foamed thermoplastic material Download PDF

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Publication number
CN104441574A
CN104441574A CN201410728884.2A CN201410728884A CN104441574A CN 104441574 A CN104441574 A CN 104441574A CN 201410728884 A CN201410728884 A CN 201410728884A CN 104441574 A CN104441574 A CN 104441574A
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China
Prior art keywords
lignin
preparation
raw material
enzymolysis
wood
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CN201410728884.2A
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Chinese (zh)
Inventor
生晓东
刘玉金
肖伟良
李学业
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SONGYUAN GUANGHE ENERGY Co Ltd
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SONGYUAN GUANGHE ENERGY Co Ltd
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Priority to CN201410728884.2A priority Critical patent/CN104441574A/en
Publication of CN104441574A publication Critical patent/CN104441574A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001Combinations of extrusion moulding with other shaping operations
    • B29C48/0012Combinations of extrusion moulding with other shaping operations combined with shaping by internal pressure generated in the material, e.g. foaming
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00Compositions of lignin-containing materials
    • C08L97/02Lignocellulosic material, e.g. wood, straw or bagasse

Abstract

The invention provides a preparation method of a lignin foamed thermoplastic material. The preparation method of the lignin foamed thermoplastic material comprises the following steps: carrying out enzymolysis on a biomass material to obtain a slag material, wherein the slag material comprises lignin; drying and crushing the slag material to obtain a lignin particle raw material; mixing the lignin particle raw material with PVC resin, then extruding and foaming to obtain the lignin foamed thermoplastic material. The method is characterized by taking the biomass material as the raw material and taking the slag material comprising the lignin after carrying out enzymolysis on the biomass material as a raw material for producing the thermoplastic material; the slag material has a good polymerization property and is matched with the PVC resin, extruded and foamed to obtain a wood-plastic material; the wood-plastic material has high tensile strength, is incapable of absorbing water and can be used for replacing wood products which are produced by taking the wood material as the raw material.

Description

A kind of preparation method of lignin foaming heat moulding material
Technical field
The present invention relates to technical field of buildings, particularly relate to a kind of preparation method of lignin foaming heat moulding material.
Background technology
Wood is moulded, i.e. wood plastic composite, it is the class advanced composite material (ACM) be surging forward domestic and international this year, refer to utilize polyethylene, polypropylene and polyvinyl chloride etc., replace commonly knowing adhesive, new wood materials is mixed into useless strings such as the wood powder more than more than 35% ~ 70%, rice husk, stalks, then through plastic processings such as extruding, mold pressing, injection mo(u)ldings, the sheet material produced or section bar.Natural timber resource reduces day by day, and the market demand of wooden goods but grows with each passing day, and Wood-plastic material substitutes traditional timber raw material has become a kind of trend.The development of Wood-plastic material can not only solve the problem that natural timber lacks day by day, the limitation such as can also overcome that strength of wood is low, variability large and organic material elastic modelling quantity is low.Wood plastic composite includes plastics, thus has good elastic modelling quantity.In addition, due to including fiber and through fully mixing with plastics, thus there is the resistance to compression suitable with hardwood, the physical and mechanical properties such as counter-bending, and its durability is obviously better than normal wood material.
In prior art, Wood-plastic material produces mainly raw material based on discarded corner wood powder, wood fragments and slag wood, add thermoplastic macromolecule material (plastics) and processing aid etc. again, the material made through die apparatus heating extrusion molding again after mixing.As shown in Figure 1, Fig. 1 is the process flow diagram that in prior art prepared by Wood-plastic material, and lignocellulose raw material is pulverized through pulverizer, adds the auxiliary material Homogeneous phase mixing such as resin, forms Wood-plastic material through extruder high temperature extrusion.But in prior art, the method directly raw material based on fiber wood materials of this production Wood-plastic material, the water resistance that cooperation resin auxiliary material obtains Wood-plastic material is poor.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of lignin foaming heat moulding material, method provided by the invention is prepared lignin foaming heat moulding material and is had good water resistance.
The invention provides a kind of preparation method of lignin foaming heat moulding material, comprise the following steps:
Biomass material is carried out enzymolysis, obtains slag charge, described slag charge comprises lignin;
By described slag charge drying with after pulverizing, obtain lignin particles raw material;
By described lignin particles material extruding foaming, obtain lignin foaming heat moulding material.
Preferably, the enzyme of described enzymolysis is cellulase;
The temperature of described enzymolysis is 45 DEG C ~ 50 DEG C;
The pH value of described enzymolysis is 4.5 ~ 5.0.
Preferably, after described drying, the moisture of slag charge is 5% ~ 10%.
Preferably, after described pulverizing, the granularity of slag charge is 150 order ~ 400 orders.
Preferably, the mass ratio of described lignin particles raw material and polyvinyl chloride resin is 100:(5 ~ 50).
Preferably, the temperature of described extruding foaming is 170 DEG C ~ 190 DEG C.
Preferably, also comprise before described enzymolysis:
Biomass material is carried out clean vapour quick-fried.
Preferably, the pressure that described clean vapour is quick-fried is 1.0MPa ~ 3.0MPa.
Preferably, the temperature that described clean vapour is quick-fried is 150 DEG C ~ 250 DEG C.
Preferably, the time that described clean vapour is quick-fried is 10 minutes ~ 15 minutes.
The invention provides a kind of preparation method of lignin foaming heat moulding material, comprise the following steps: biomass material is carried out enzymolysis, obtains slag charge, described slag charge comprises lignin; By described slag charge drying with after pulverizing, obtain lignin particles raw material; Extruding foaming after being mixed with polyvinyl chloride resin by described lignin particles raw material, obtains lignin foaming heat moulding material.Method provided by the invention with living beings material for raw material, using the slag charge comprising lignin after biomass material enzymolysis as the raw material producing thermoplastic material, there is good polymerization, after coordinating extruding foaming with polyvinyl chloride resin, the Wood-plastic material obtained is made still to have higher tensile strength, and there is the characteristic do not absorbed water, alternative take timber as the wood-based product of raw material.And, method provided by the invention be with the accessory substance lignin of biomass material enzymolysis for raw material, be translated into the lignin foaming heat moulding material that added value is higher, there is higher economic benefit; Moreover the lignin to obtain due to enzymolysis has polymerization property, the lignin foaming heat moulding material obtained with polyvinyl chloride resin mixing extruding foaming has higher mechanical strength.Experimental result shows, the fracture load by bending of the real core lignin foaming heat moulding material that method provided by the invention prepares is 4020N, and water absorption rate is 0.24%, and water suction tensile strain rate is 0.09%, water suction change width rate is 0.04%, and water sucting thickness rate of change is 0.06%; The fracture load by bending of hollow wood quality foaming heat moulding material is 3650N, and water absorption rate is 0.30%, and water suction tensile strain rate is 0.07%, and water suction change width rate is 0.04%, and water sucting thickness rate of change is 0.05%; The moisture content of lignin thermoplastic decorative panel is 0.3%, and bending strength mean value is 28.2MPa, and bending strength minimum of a value is 26.2MPa.
In addition, lignin foaming heat moulding material provided by the invention comprises polyvinyl chloride resin, adds the anti-anti-flammability of material; And, obtain thermoplastic material by extruding foaming, form foaming at material internal, alleviate material weight, improve material heat-insulating property.
Accompanying drawing explanation
Fig. 1 is the process flow diagram that in prior art prepared by Wood-plastic material;
Preparation technology's flow chart of the lignin foaming heat moulding material that Fig. 2 provides for the embodiment of the present invention.
Detailed description of the invention
The invention provides a kind of preparation method of lignin foaming heat moulding material, comprise the following steps:
Biomass material is carried out enzymolysis, obtains slag charge, described slag charge comprises lignin;
By described slag charge drying with after pulverizing, obtain lignin particles raw material;
Extruding foaming after being mixed with polyvinyl chloride resin by described lignin particles raw material, obtains lignin foaming heat moulding material.
Method provided by the invention with living beings material for raw material, using the slag charge comprising lignin after biomass material enzymolysis as the raw material producing thermoplastic material, there is good polymerization, after coordinating extruding foaming with polyvinyl chloride resin, the Wood-plastic material obtained is made still to have higher tensile strength, and there is the characteristic do not absorbed water, alternative take timber as the wood-based product of raw material.And, method provided by the invention be with the accessory substance lignin of biomass material enzymolysis for raw material, be translated into the lignin foaming heat moulding material that added value is higher, there is higher economic benefit; Moreover the lignin to obtain due to enzymolysis has polymerization property, the lignin foaming heat moulding material obtained with polyvinyl chloride resin mixing extruding foaming has higher mechanical strength.In addition, the lignin foaming heat moulding material that method provided by the invention prepares also has excellent antibacterial and mouldproof performance.
Method provided by the invention for raw material, prepares lignin foaming heat moulding material with the lignin obtained after living beings material enzymolysis.The raw material that the present invention adopts is the discarded object of biochemical lines, achieves effective utilization of resource, conserves forests; The lignin foaming heat moulding material obtained can waterproof, fire prevention, anti-aging, indeformable, anticorrosion, favorable moth-proof, do not shrink, do not ftracture, sun-proof, colour-fast, do not produce crack, non-warpage, sticky coagulation dry, nontoxic, scab and twill without timber; Those skilled in the art also as required without the need to painting any color, can prepare the lignin foaming heat moulding material of arbitrary shape; And the lignin foaming heat moulding material that the present invention prepares is recyclable.
Biomass material is carried out enzymolysis by the present invention, obtains slag charge, and described slag charge comprises lignin.The present invention does not have special restriction to the kind of described biomass material and source, adopts biomass material well known to those skilled in the art.In the present invention, described biomass material preferably includes one or more in straw and timber; Concrete, in an embodiment of the present invention, described biomass material can be specially maize straw, wheat stalk or rice straw.
In the present invention, the enzyme of described enzymolysis is preferably cellulase, biomass material forms primarily of plant cell wall, cell membrane basic composition is cellulose, hemicellulose and lignin, cellulose and hemicellulose are wrapped up layer by layer by lignin, cellulose is a kind of straight-chain polysaccharide having 100 ~ 1000 glucose sugar monomers and connect with Isosorbide-5-Nitrae-glycosidic bond, the thread insoluble micro fiber of multiple molecule one-tenth arranged in parallel; Hemicellulose comprises wood sugar, arabinose, galactolipin and mannose, wherein most importantly wood sugar; Lignin is the macromolecule aromatic compound formed for base unit with phenylpropyl alcohol alkane machine derivative.Wherein, hemicellulose comparatively facile hydrolysis is pentose, and cellulose is more difficult is hydrolyzed to hexose, and lignin generally uses as fuel.The present invention is raw material with lignin, prepares the lignin foaming heat moulding material that added value is higher, has higher economic benefit.
The source of the present invention to described cellulase does not have special restriction, adopts cellulase well known to those skilled in the art.In an embodiment of the present invention, described cellulase can be specially that the country of origin is Denmark, dealer is letter (China) Bioisystech Co., Ltd of Novi, lot number is the cellulase of VCNI0020.In the present invention, the quality of described cellulase and the absolute dry mass of biomass material are than being preferably (1 ~ 5): 100, are more preferably (1 ~ 2): 100.
In the present invention, the temperature of described enzymolysis is preferably 40 DEG C ~ 55 DEG C, is more preferably 45 DEG C ~ 50 DEG C; The pH value of described enzymolysis is preferably 4.5 ~ 5.0, is more preferably 4.6 ~ 4.9, most preferably is 4.8 ± 0.1; The time of described enzymolysis is preferably 60 hours ~ 72 hours, is more preferably 62 hours ~ 70 hours, most preferably is 64 hours ~ 68 hours.
The present invention is before by described biomass material enzymolysis, preferably described biomass material is carried out clean vapour quick-fried, in the quick-fried process of described clean vapour, hemicellulose and lignin can produce acidic materials, hemicellulose degradation is made to become soluble sugar, the lignin of compound middle lamella softens and Partial digestion simultaneously, has slackened interfibrous bonding, has been conducive to the carrying out of follow-up enzymolysis process.In the present invention, the quick-fried pressure of described clean vapour is preferably 1.0MPa ~ 3.0MPa, is more preferably 1.5MPa ~ 2.0MPa; The quick-fried temperature of described clean vapour is preferably 150 DEG C ~ 250 DEG C, is more preferably 170 DEG C ~ 220 DEG C, most preferably is 190 DEG C ~ 200 DEG C; Described clean vapour quick-fried time is preferably 10 minutes ~ 15 minutes; In an embodiment of the present invention, the time that described clean vapour is quick-fried can be specially 10min, 12min, 14min or 15min.
The present invention to described biomass material carry out clean vapour quick-fried before, preferably carry out dedusting to described biomass material, the method for the present invention to described dedusting does not have special restriction, adopts the technical scheme of dedusting well known to those skilled in the art.
After completing described enzymolysis, the enzymolysis product obtained preferably is carried out Separation of Solid and Liquid by the present invention, obtains the slag charge comprising lignin.The method of the present invention to described Separation of Solid and Liquid does not have special restriction, adopts the technical scheme of Separation of Solid and Liquid well known to those skilled in the art.In the present invention, described Separation of Solid and Liquid is preferably sheet frame separation.The equipment of the method that the present invention is separated described sheet frame and employing does not have special restriction, adopts plate and frame filter press well known to those skilled in the art to carry out Separation of Solid and Liquid.Concrete, in an embodiment of the present invention, plate and frame filter press forms one group of filter chamber by the filter plate be alternately arranged and filter frame; There is groove on the surface of described filter plate, and the protruding parts of described groove is in order to supporting filter cloth; The corner of described filter frame and filter plate there is through hole, forms complete passage after assembling, suspension, washings and extraction filtrate can be passed into.The both sides of described filter plate and described filter frame are respectively provided with handle, and described handle rest, on crossbeam, compresses filter plate and filter frame by hold down gag.Filter cloth between described filter plate and filter frame plays gasket seal; In pressure-filtering process, by charging pump, suspension is pressed into filter chamber, filter cloth forms filter residue, until be full of filter chamber; Filtrate, through filter cloth and along filter plate trench flow to sheet frame corner passage, is concentrated and is discharged.
After obtaining comprising the slag charge of lignin, the present invention is dry and pulverize by described slag charge, obtains lignin particles raw material.The method of the present invention to described drying and pulverizing does not have special restriction, adopts the technical scheme of drying well known to those skilled in the art and pulverizing.In the present invention, described drying is preferably dries, and after described drying, the moisture of slag charge is preferably within 10%, is more preferably 5% ~ 10%, most preferably is < 5%.In the present invention, described pulverizing adopts disintegrating apparatus well known to those skilled in the art; After described pulverizing, the granularity of slag charge is preferably 150 order ~ 400 orders, is more preferably 250 order ~ 380 orders, most preferably is 300 order ~ 350 orders.
After obtaining lignin particles raw material, extruding foaming after described lignin particles raw material mixes with polyvinyl chloride resin by the present invention, obtains lignin foaming heat moulding material.The present invention does not have special restriction to the source of described wooden polyvinyl chloride resin and physical parameter, adopts polyvinyl chloride resin well known to those skilled in the art.In the present invention, the mass ratio of described lignin particles raw material and described polyvinyl chloride resin is preferably 100:(5 ~ 50), be more preferably 100:(10 ~ 45), most preferably be 100:(15 ~ 40).
In the present invention, the temperature of described extruding foaming is preferably 170 DEG C ~ 190 DEG C, is more preferably 175 DEG C ~ 185 DEG C, most preferably is 178 DEG C ~ 182 DEG C.The equipment of the present invention to described extruding foaming does not have special restriction, adopts extruding foaming machine well known to those skilled in the art, and extruding obtains the lignin foaming heat moulding material of difformity and kind as required.
See preparation technology's flow chart of the lignin foaming heat moulding material that Fig. 2, Fig. 2 provide for the embodiment of the present invention, in an embodiment of the present invention, biomass material is carried out enzymolysis, obtain enzymolysis xylogen, described enzymolysis xylogen is carried out drying and pulverizing successively, obtain lignin particles raw material; Again extruding foaming is carried out in the lignin particles heating raw materials obtained pressurization, obtain lignin foaming heat moulding material.
Method provided by the invention can prepare the lignin foaming heat moulding material of outdoor application, also may be used for the lignin foaming heat moulding material used in preparation room; According to field of employment, may be used for the lignin foaming heat moulding material preparing public place, also may be used for the lignin foaming heat moulding material for the preparation of not common place; According to structure, may be used for preparing real core lignin foaming heat moulding material, also may be used for preparation hollow wood quality foaming heat moulding material; According to surface treatment, may be used for preparing vegetarian noodles lignin foaming heat moulding material, also may be used for preparation embossing lignin foaming heat moulding material, can also for the preparation of polishing lignin foaming heat moulding material.Those skilled in the art can as required, and select suitable mould to prepare to be applicable to the lignin foaming heat moulding material of varying environment, occasion, the present invention does not have special restriction to this.
Method provided by the invention can also for the preparation of the lignin thermoplastic decorative panel of main wallboard, wallboard and ceiling, and concrete, can be naked lignin thermoplastic decorative panel, also can be facing lignin thermoplastic decorative panel.
The invention provides a kind of preparation method of lignin foaming heat moulding material, comprise the following steps: biomass material is carried out enzymolysis, obtains slag charge, described slag charge comprises lignin; By described slag charge drying with after pulverizing, obtain lignin particles raw material; Extruding foaming after being mixed with polyvinyl chloride resin by described lignin particles raw material, obtains lignin foaming heat moulding material.Method provided by the invention with living beings material for raw material, using the slag charge comprising lignin after biomass material enzymolysis as the raw material producing thermoplastic material, there is good polymerization, after coordinating extruding foaming with polyvinyl chloride resin, the Wood-plastic material obtained is made still to have higher tensile strength, and there is the characteristic do not absorbed water, alternative take timber as the wood-based product of raw material.And, method provided by the invention be with the accessory substance lignin of biomass material enzymolysis for raw material, be translated into the lignin foaming heat moulding material that added value is higher, there is higher economic benefit; Moreover the lignin to obtain due to enzymolysis has polymerization property, the lignin foaming heat moulding material obtained with polyvinyl chloride resin mixing extruding foaming has higher mechanical strength.Experimental result shows, the fracture load by bending of the real core lignin foaming heat moulding material that method provided by the invention prepares is 4020N, and water absorption rate is 0.24%, and water suction tensile strain rate is 0.09%, water suction change width rate is 0.04%, and water sucting thickness rate of change is 0.06%; The fracture load by bending of hollow wood quality foaming heat moulding material is 3650N, and water absorption rate is 0.30%, and water suction tensile strain rate is 0.07%, and water suction change width rate is 0.04%, and water sucting thickness rate of change is 0.05%; The moisture content of lignin thermoplastic decorative panel is 0.3%, and bending strength mean value is 28.2MPa, and bending strength minimum of a value is 26.2MPa.
In order to further illustrate the present invention, below in conjunction with embodiment, the preparation method to lignin foaming heat moulding material provided by the invention is described in detail, but they can not be interpreted as limiting the scope of the present invention.
In the following embodiments, adopt flow process shown in Fig. 2, carry out the preparation of lignin foaming heat moulding material; In the following embodiments, the cellulase country of origin is Denmark, and believe that (China) Bioisystech Co., Ltd sells by dealer Novi, lot number is VCNI0020.
Embodiment 1
Pretreatment system is delivered to after maize straw being sieved dedusting, at 1.5MPa and 190 DEG C, carry out HTHP clean vapour quick-fried 10 minutes, and then be delivered to enzymatic hydrolysis system, enzymolysis is carried out under the effect of cellulase, the addition of cellulase is 1% of maize straw absolute dry mass, and enzymolysis carries out under normal pressure, 48 DEG C ± 2 DEG C and pH value are the condition of 4.8 ± 0.1, and enzyme digestion reaction is after 60 hours, the suspension obtained is delivered to plate and frame filter press and carries out sheet frame separation, obtain slag charge;
The slag charge that obtains is dried to moisture 8%, more dried slag charge is crushed to granularity is 250 orders, obtains lignin particles raw material;
After the lignin particles raw material of 100 weight portions is mixed with the polyvinyl chloride resin of 10 weight portions, be delivered in injection machine, injection mo(u)lding at 170 DEG C, obtain real core lignin foaming heat moulding material.
The real core lignin foaming heat moulding material obtained is carried out Performance Detection by the present invention, and result is as shown in table 1, the performance test results of the real core lignin foaming heat moulding material that table 1 obtains for the embodiment of the present invention 1.
The performance test results of the real core lignin foaming heat moulding material that table 1 embodiment of the present invention 1 obtains
Note: GB/T 24508-2009 refers to the national examination criteria of " Wood-plastic floor ", Q/GHNY 02-2014 refers to the lignin material floor enterprise operative norm of Guang He limited energy company of Songyuan City.
As can be seen from Table 1, the lignin foaming heat moulding material that method provided by the invention obtains has good mechanical property, there is the characteristic do not absorbed water, and thermal adaptability is better, surface anti-pollution burn into is wear-resisting, and ageing-resistant performance is better, and burst size of methanal is extremely low, volatile content is also lower, has good environmental-protecting performance.
Embodiment 2
Pretreatment system is delivered to after maize straw being sieved dedusting, at 1.5MPa and 190 DEG C, carry out HTHP clean vapour quick-fried 15 minutes, and then be delivered to enzymatic hydrolysis system, enzymolysis is carried out under the effect of cellulase, the addition of cellulase is 2% of maize straw absolute dry mass, and enzymolysis carries out under normal pressure, 45 DEG C and pH value are the condition of 4.8, and enzyme digestion reaction is after 72 hours, the suspension obtained is delivered to plate and frame filter press and carries out sheet frame separation, obtain slag charge;
The slag charge that obtains is dried to moisture 5%, more dried slag charge is crushed to granularity is 300 orders, obtains lignin particles raw material;
After the lignin particles raw material of 100 weight portions is mixed with the polyvinyl chloride resin of 50 weight portions, be delivered in injection machine, injection mo(u)lding at 190 DEG C, obtain hollow wood quality foaming heat moulding material.
The hollow wood quality foaming heat moulding material obtained is carried out performance test by the present invention, and result is as shown in table 2, and table 2 is the performance test results of the hollow wood quality foaming heat moulding material that the embodiment of the present invention 2 obtains.
The performance test results of the hollow wood quality foaming heat moulding material that table 2 embodiment of the present invention 2 obtains
Note: GB/T 24508-2009 refers to " Wood-plastic floor " national examination criteria, Q/GHNY 02-2014 refers to the lignin material floor enterprise operative norm of Guang He limited energy company of Songyuan City.
As can be seen from Table 2, the lignin foaming heat moulding material that method provided by the invention obtains has good mechanical property, there is the characteristic do not absorbed water, and thermal adaptability is better, surface anti-pollution burn into is wear-resisting, and ageing-resistant performance is better, and burst size of methanal is extremely low, volatile content is also lower, has good environmental-protecting performance.
Embodiment 3
Pretreatment system is delivered to after maize straw being sieved dedusting, at 1.5MPa and 190 DEG C, carry out HTHP clean vapour quick-fried 13 minutes, and then be delivered to enzymatic hydrolysis system, enzymolysis is carried out under the effect of cellulase, the addition of cellulase is 1.5% of maize straw absolute dry mass, and enzymolysis carries out under normal pressure, 50 DEG C and pH value are the condition of 4.6, and enzyme digestion reaction is after 66 hours, the suspension obtained is delivered to plate and frame filter press and carries out sheet frame separation, obtain slag charge;
The slag charge that obtains is dried to moisture 10%, more dried slag charge is crushed to granularity is 350 orders, obtains lignin particles raw material;
After the lignin particles raw material of 100 weight portions and the polyvinyl chloride resin of 30 weight portions, be delivered in injection machine, injection mo(u)lding at 180 DEG C, obtain lignin thermoplastic decorative panel.
The lignin thermoplastic decorative panel obtained is carried out Performance Detection by the present invention, and result is as shown in table 3, and table 3 is the performance test results of the lignin thermoplastic decorative panel that the embodiment of the present invention 3 obtains.
The performance test results of the lignin material decorative panel that table 3 embodiment of the present invention 3 obtains.
Note: GB/T 24137-2009 refers to the national examination criteria of " wood-plastic decorative board ", Q/GHNY03-2014 refers to the lignin material decorative panel enterprise operative norm of Guang He limited energy company of Songyuan City.
As can be seen from Table 3, the lignin thermoplastic decorative panel that method provided by the invention obtains has good mechanical property, there is the characteristic do not absorbed water, good dimensional stability, and thermal adaptability is better, surperficial anti-pollution burn into is wear-resisting, and ageing-resistant performance is better, burst size of methanal is extremely low, has good environmental-protecting performance.
As can be seen from the above embodiments, method provided by the invention with living beings material for raw material, using the slag charge comprising lignin after biomass material enzymolysis as the raw material producing thermoplastic material, there is good polymerization, after coordinating extruding foaming with polyvinyl chloride resin, make the Wood-plastic material obtained still have higher tensile strength, and have the characteristic do not absorbed water, alternative take timber as the wood-based product of raw material.And, method provided by the invention be with the accessory substance lignin of biomass material enzymolysis for raw material, be translated into the lignin foaming heat moulding material that added value is higher, there is higher economic benefit; Moreover the lignin to obtain due to enzymolysis has polymerization property, the lignin foaming heat moulding material obtained with polyvinyl chloride resin mixing extruding foaming has higher mechanical strength.Experimental result shows, the fracture load by bending of the real core lignin foaming heat moulding material that method provided by the invention prepares is 4020N, and water absorption rate is 0.24%, and water suction tensile strain rate is 0.09%, water suction change width rate is 0.04%, and water sucting thickness rate of change is 0.06%; The fracture load by bending of hollow wood quality foaming heat moulding material is 3650N, and water absorption rate is 0.30%, and water suction tensile strain rate is 0.07%, and water suction change width rate is 0.04%, and water sucting thickness rate of change is 0.05%; The moisture content of lignin thermoplastic decorative panel is 0.3%, and bending strength mean value is 28.2MPa, and bending strength minimum of a value is 26.2MPa.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (10)

1. a preparation method for lignin foaming heat moulding material, comprises the following steps:
Biomass material is carried out enzymolysis, obtains slag charge, described slag charge comprises lignin;
By described slag charge drying with after pulverizing, obtain lignin particles raw material;
Extruding foaming after being mixed with polyvinyl chloride resin by described lignin particles raw material, obtains lignin foaming heat moulding material.
2. preparation method according to claim 1, is characterized in that, the enzyme of described enzymolysis is cellulase;
The temperature of described enzymolysis is 45 DEG C ~ 50 DEG C;
The pH value of described enzymolysis is 4.5 ~ 5.0.
3. preparation method according to claim 1, is characterized in that, after described drying, the moisture of slag charge is within 10wt%.
4. preparation method according to claim 1, is characterized in that, after described pulverizing, the granularity of slag charge is 150 order ~ 400 orders.
5. preparation method according to claim 1, is characterized in that, the mass ratio of described lignin particles raw material and polyvinyl chloride resin is 100:(5 ~ 50).
6. preparation method according to claim 1, is characterized in that, the temperature of described extruding foaming is 170 DEG C ~ 190 DEG C.
7. the preparation method according to claim 1 ~ 6 any one, is characterized in that, also comprises before described enzymolysis:
Biomass material is carried out clean vapour quick-fried.
8. preparation method according to claim 7, is characterized in that, the quick-fried pressure of described clean vapour is 1.0MPa ~ 3.0MPa.
9. preparation method according to claim 7, is characterized in that, the quick-fried temperature of described clean vapour is 150 DEG C ~ 250 DEG C.
10. preparation method according to claim 7, is characterized in that, described clean vapour quick-fried time is 10 minutes ~ 15 minutes.
CN201410728884.2A 2014-12-03 2014-12-03 Preparation method of lignin foamed thermoplastic material Pending CN104441574A (en)

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Application publication date: 20150325