CN110183734A - A kind of preparation method of ageing-resistant Wood plastic composite - Google Patents
A kind of preparation method of ageing-resistant Wood plastic composite Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/02—Cellulose; Modified cellulose
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract
The invention belongs to Wood plastic composite preparation technical fields, and in particular to a kind of preparation method of ageing-resistant Wood plastic composite.The present invention is first using roundpod jute leaf as raw material, after the processing of alkali bubble, using isopropanol as alkylating agent, so that alkylated reaction occurs for tossa, obtain alkylation tossa, again using tomato skin as raw material, the lycopene in tomato skin is extracted with ethanol solution, by lycopene and the tossa mixed fermentation containing alkylation, so that lycopene is integrated to alkylated cellulose surface, obtain modified tossa, then using rice husk as raw material, rice husk alkali is steeped, after high temperature and pressure boiling, it is evaporated under reduced pressure under alkaline condition with phenol, obtain the mixture containing phenolic resin, tossa will be finally modified, mixture containing phenolic resin is mixed, extrusion forming, discharging cooling, up to ageing-resistant Wood plastic composite, tensile strength of the invention is high, ageing-resistant performance is good, long service life, it has broad application prospects.
Description
Technical field
The invention discloses a kind of preparation methods of ageing-resistant Wood plastic composite, belong to Wood plastic composite technology of preparing
Field.
Background technique
Wood plastic composite is a kind of brand-new material, and this material is with pure or recycling plastics and natural fibre
Dimension filler is made, and plastics therein can be the various modelings such as high density polyethylene (HDPE), polypropylene, polystyrene and polyvinyl chloride
Material, natural fiber includes wood powder and burlap fiber.
Wood plastic composite has excellent mechanical performance, very high dimensional stability, and can be used to form multiple
Miscellaneous shape can be used as the packaging materials such as pallet, packing case, the storage materials such as bed board, paving beam, house, floor, building template etc.
Finishing, ornament materials, the leisure material such as outdoor tables and chairs, stool that the occasions such as park, court, street use, automobile inside decoration materials,
Tubing etc..
The preparation method of usual Wood plastic composite is to mix plant fiber with plastic grain with the state of powder, then lead to
It crosses to be granulated that Wood plastic composite particle is made, squeezed out or be molded etc. and is processed into product.It moulds in the wooden actual production process,
There is some difference for own dimensions and the ratio distribution of plant fiber, while larger with the shape of plastic grain, size difference,
When conveying and blanking, plastics and plant fiber layering can be generated, the case where layering between plant fiber difference size, cause moulding
In wood composite material preparation process, plastics, different size fibers are unevenly distributed in the short time, to generate the change of material structure
Change, affects the performance and quality of product.Meanwhile plant fiber is produced in the form of powder, can be generated in the process a large amount of
Fugitive dust, carry, weigh and charging it is also more troublesome, on the one hand cause the pollution of environment, on the other hand reduce production effect
Rate.
Although Wood plastic composite has many good qualities, there are still deficiencies so far, as ageing resistance is poor, creep resistance
Difference, the consistency of color and persistence are poor, can be significantly lower than common wood products by microbial attack, tensile strength.Also, at present
One of the primary raw material of common Wood plastic composite plant fiber is mainly made of cellulose, hemicellulose and lignin,
In contain a large amount of alcoholic extract hydroxyl group, oxygen and phenolic hydroxyl group isopolarity group, and prepare another primary raw material thermoplasticity of Wood plastic composite
The surface of polyolefin is nonpolar, therefore the polarity spectrum of the two is very big, and in plant fiber hydroxyl can be formed it is intermolecular
Hydrogen bond is simultaneously mutually intertwined, and prevents it from being homogeneously dispersed in thermoplastic polyolefin, so as to cause between fiber and plastics
Interface compatibility it is poor, in addition its that there are mechanical strengths is lower, thus affect its using effect, shorten its service life with
And define its use scope.Therefore, it is compound to modeling wood to develop the Wood plastic composite that a kind of ageing resistance is good, tensile strength is high
Technical field of material has positive effect.
Summary of the invention
Present invention mainly solves the technical issues of, at present on the market existing ageing-resistant Wood plastic composite it is resistance to old
The defect that the property changed is bad, tensile strength is inadequate, provides a kind of preparation method of ageing-resistant Wood plastic composite.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that:
A kind of ageing-resistant Wood plastic composite the preparation method comprises the following steps:
It is in mass ratio to be put into stirring instrument, after stirring 30~40min, after 2 ︰ 3 are mixed by modified tossa, mixture
Enter extrusion forming in extruder, discharges, be cooled to room temperature to get ageing-resistant Wood plastic composite；
Modified tossa the preparation method comprises the following steps:
(1) roundpod jute leaf is put into pulverizer, crushes 30~40min, roundpod jute leaf crushed material is obtained, by roundpod jute leaf crushed material, matter
After measuring the sodium hydroxide solution mixing that score is 5%, it is put into reaction kettle, is heated to 50~60 DEG C, it is stirred to react 15~
20min obtains alkali leaching product；
(2) above-mentioned alkali the aqueous isopropanol that product, the sodium hydroxide solution that mass fraction is 30%, mass fraction are 40% is soaked to mix
It after conjunction, is put into stirring instrument, with the revolving speed of 400~600r/min, is stirred to react 20~30min, obtain pretreatment object, it is spare；
(3) tomato skin is collected, tomato skin is put into tissue pulverizer, with the revolving speed of 500~700r/min, crush 10~
15min obtains tomato skin crushed material, after tomato skin crushed material, the ethanol solution that mass fraction is 30% are mixed, is put into stirring
In instrument, after stirring 15~20min, filtering is stood, collects filtrate；
(4) in mass ratio it is to obtain fermentation substrate after 1 ︰ 2 is mixed by spare pretreatment object, above-mentioned filtrate, fermentation substrate is put into
In fermentor, and into fermentor be added fermentation substrate quality 6~8% bed-silt and fermentation substrate quality 4~6% steaming
Distilled water is sealed by fermentation 1~2 week under conditions of temperature is 20~30 DEG C, discharging, obtains modified tossa, spare；
Preparation method of mixture are as follows:
(1) rice husk is put into pulverizer, crushes 20~30min, obtains rice husk crushed material, rice husk crushed material is put into quality point
After number is impregnates 20~30min in 5% sodium hydroxide solution, pour into high temperature and pressure cooker, high temperature and pressure 1~2h of boiling,
Obtain mixed liquor；
(2) it after mixing above-mentioned mixed liquor, phenol, the sodium hydroxide solution that mass fraction is 2%, pours into vacuum distillation apparatus,
It is 90~100 DEG C in temperature, under conditions of pressure is 800~1000Pa, is evaporated under reduced pressure 40~50min, obtains mixture.
Modified tossa, mixture mixing mass ratio are 2 ︰ 3.
Roundpod jute leaf crushed material, the sodium hydroxide solution mixing quality that mass fraction is 5% in modified tossa preparation method
Than for 1 ︰ 7.
Being modified alkali leaching product, mass fraction are 30% in tossa preparation method sodium hydroxide solution, mass fraction is
40% aqueous isopropanol mixing mass ratio is 7 ︰, 7 ︰ 1.
Tomato skin crushed material, the ethanol solution mixing mass ratio that mass fraction is 30% in modified tossa preparation method
For 2 ︰ 5.
Object is pre-processed in modified tossa preparation method, above-mentioned filtrate mixing mass ratio is 1 ︰ 2, the river bed silt being added
The quality of mud and distilled water is preferably fermentation substrate quality 6~8%, 4~6%.
Preparation method of mixture high temperature autoclaving tank is 180~200 DEG C in temperature, and pressure is 1.6~1.8MPa's
Under the conditions of carry out.
The sodium hydroxide solution mixing mass ratio that mixed liquor, phenol, mass fraction are 2% in preparation method of mixture is 2 ︰
2 ︰ 5.
The beneficial effects of the present invention are:
(1) present invention carries out alkali bubble processing to it, using isopropanol as alkylating agent, so that jute first using roundpod jute leaf as raw material
Alkylated reaction occurs for fiber, obtains alkylation tossa, then to contain a large amount of lycopenes in tomato skin, molten using ethyl alcohol
Liquid extracts the lycopene in tomato skin, by lycopene and the tossa mixed fermentation containing alkylation, so that lycopene
It is integrated to alkylated cellulose surface, obtains modified tossa, then using rice husk as raw material, by rice husk alkali bubble, high temperature and pressure
After boiling, it is evaporated under reduced pressure under alkaline condition with phenol, obtains the mixture containing phenolic resin, it finally will modified jute fibre
Dimension, the mixture containing phenolic resin are mixed, and are put into extrusion forming in extruder, discharging, cooling are to get ageing-resistant modeling wood
Composite material, the present invention carries out alkali bubble processing to it first using roundpod jute leaf as raw material, so that the lignin in roundpod jute leaf decomposes,
The decomposition of lignin is risen in ageing-resistant Wood plastic composite produced by the present invention so that cellulose is separated from each other with hemicellulose
To connection, the effect stretched, crosslink density, the tensile strength of ageing-resistant Wood plastic composite, the intensity of tossa are improved
It is high, wearability is good, has natural antibacterial and anti-ultraviolet function, the restorability after deformation is good, tossa through alkali bubble at
Reason, so that base molecule together with the hydroxy combining of tossa, weakens the active force between tossa molecule, so that yellow
Spacing between flaxen fiber molecule increases, then using isopropanol as alkylating agent, so that alkylated reaction occurs for tossa, significantly
Its swelliong power is enhanced, due to the presence of alkyl, so that tossa is difficult to again close to hydrogen bond is formed, it can be uniform
It is dispersed in ageing-resistant Wood plastic composite produced by the present invention；
(2) present invention contains a large amount of lycopenes, extracts tomato skin using ethanol solution using tomato skin as raw material in tomato skin
In lycopene, tomato red is known as very strong oxidation resistance, and ageing-resistant performance is strong, has ageing-resistant Wood plastic composite
Ageing-resistant performance, by the filtrate containing lycopene and the pretreatment object mixed fermentation containing alkylation tossa, so that kind
Lycopene is integrated to alkylated cellulose surface, obtains modified tossa, tossa has resistance to ag(e)ing, so that ageing-resistant
The resistance to ag(e)ing of Wood plastic composite is promoted, then using rice husk as raw material, by rice husk after alkali steeps, high temperature and pressure boiling is being steamed
During boiling, rice husk is hydrolyzed, and is decomposed and is generated the substances such as carbohydrate, pectin, these substances have viscosity, so that ageing-resistant modeling is wooden
Each component is more securely bonded to together in composite material, and the rice husk after then steeping alkali depressurizes under alkaline condition with phenol
Distillation, rice husk hydrolysate can generate phenolic resin with phenol reactant, and the adhesive property of phenolic resin is fabulous, resistance to ag(e)ing is good,
Each component can be firmly bonded together, so that the tensile strength of ageing-resistant Wood plastic composite enhances, resistance to ag(e)ing mentions
It rises, and phenol can be generated with the hydroxyl on phenolic resin and be reacted, the hydroxyl strong to hydrophily generates shielding action, so that this hair
Bright ageing-resistant Wood plastic composite obtained has hydrophobicity, will finally be modified tossa, contains the mixture of phenolic resin
It is mixed, is put into extrusion forming in extruder, discharging, cooling have wide application to get ageing-resistant Wood plastic composite
Prospect.
Specific embodiment
Roundpod jute leaf is put into pulverizer, 30~40min is crushed, roundpod jute leaf crushed material is obtained, by roundpod jute leaf crushed material, matter
The sodium hydroxide solution that amount score is 5% is after 1 ︰ 7 is mixed, to be put into reaction kettle, be heated to 50~60 DEG C in mass ratio,
It is stirred to react 15~20min, obtains alkali leaching product；By above-mentioned alkali leaching product, the sodium hydroxide solution that mass fraction is 30%, matter
The aqueous isopropanol that amount score is 40% is to be put into stirring instrument after 7 ︰, 7 ︰ 1 is mixed in mass ratio, with turning for 400~600r/min
Speed is stirred to react 20~30min, obtains pretreatment object, spare；Tomato skin is collected, tomato skin is put into tissue pulverizer, with
The revolving speed of 500~700r/min crushes 10~15min, obtains tomato skin crushed material, be by tomato skin crushed material, mass fraction
30% ethanol solution is to be put into stirring instrument after 2 ︰ 5 are mixed in mass ratio, after stirring 15~20min, stands filtering, collection filter
Liquid；In mass ratio it is to obtain fermentation substrate after 1 ︰ 2 is mixed by spare pretreatment object, above-mentioned filtrate, fermentation substrate is put into fermentation
In tank, and into fermentor be added fermentation substrate quality 6~8% bed-silt and fermentation substrate quality 4~6% distillation
Water is sealed by fermentation 1~2 week under conditions of temperature is 20~30 DEG C, discharging, obtains modified tossa, spare；By rice husk
It is put into pulverizer, crushes 20~30min, obtain rice husk crushed material, rice husk crushed material is put into the hydrogen-oxygen that mass fraction is 5%
Change sodium solution in impregnate 20~30min after, pour into high temperature and pressure cooker, temperature be 180~200 DEG C, pressure be 1.6~
Under conditions of 1.8MPa, high temperature and pressure 1~2h of boiling obtains mixed liquor；It is 2% by above-mentioned mixed liquor, phenol, mass fraction
Sodium hydroxide solution is after 2 ︰, 2 ︰ 5 is mixed, to pour into vacuum distillation apparatus in mass ratio, is 90~100 DEG C in temperature, pressure is
Under conditions of 800~1000Pa, it is evaporated under reduced pressure 40~50min, obtains mixture；By spare modified tossa, above-mentioned mixing
Object is to be put into stirring instrument after 2 ︰ 3 are mixed, after stirring 30~40min, pour into extrusion forming in extruder, discharge in mass ratio,
It is cooled to room temperature to get ageing-resistant Wood plastic composite.
Example 1
The preparation of modified tossa:
Roundpod jute leaf is put into pulverizer, 30min is crushed, obtains roundpod jute leaf crushed material, be by roundpod jute leaf crushed material, mass fraction
5% sodium hydroxide solution is after 1 ︰ 7 is mixed, to be put into reaction kettle, be heated to 50 DEG C, be stirred to react in mass ratio
15min obtains alkali leaching product；
Above-mentioned alkali is soaked into aqueous isopropanol that sodium hydroxide solution, mass fraction that product, mass fraction are 30% are 40% by matter
It after amount for 7 ︰, 7 ︰ 1 than mixing, is put into stirring instrument, with the revolving speed of 400r/min, is stirred to react 20min, obtain pretreatment object, it is standby
With；
Tomato skin is collected, tomato skin is put into tissue pulverizer, with the revolving speed of 500r/min, 10min is crushed, obtains tomato skin
The ethanol solution that tomato skin crushed material, mass fraction are 30% is after 2 ︰ 5 are mixed, to be put into stirring instrument by crushed material in mass ratio
In, after stirring 15min, filtering is stood, collects filtrate；
In mass ratio it is to obtain fermentation substrate after 1 ︰ 2 is mixed by spare pretreatment object, above-mentioned filtrate, fermentation substrate is put into fermentation
In tank, and the bed-silt of addition fermentation substrate quality 6% and the distilled water of fermentation substrate quality 4% into fermentor, in temperature
It under conditions of degree is 20 DEG C, is sealed by fermentation 1 week, discharging, obtains modified tossa, it is spare；
The preparation of mixture:
Rice husk is put into pulverizer, 20min is crushed, obtains rice husk crushed material, it is 5% that rice husk crushed material, which is put into mass fraction,
Sodium hydroxide solution in impregnate 20min after, pour into high temperature and pressure cooker, be 180 DEG C in temperature, pressure is 1.6MPa
Under the conditions of, high temperature and pressure boiling 1h obtains mixed liquor；
It is in mass ratio after 2 ︰, 2 ︰ 5 is mixed, to pour into and subtract by the sodium hydroxide solution that above-mentioned mixed liquor, phenol, mass fraction are 2%
It presses in distilling apparatus, is 90 DEG C in temperature, under conditions of pressure is 800Pa, is evaporated under reduced pressure 40min, obtains mixture；
The preparation of ageing-resistant Wood plastic composite:
It is in mass ratio to be put into stirring instrument after 2 ︰ 3 are mixed, stir 30min by spare modified tossa, said mixture
Afterwards, extrusion forming in extruder is poured into, discharges, is cooled to room temperature to get ageing-resistant Wood plastic composite.
Example 2
The preparation of modified tossa:
Roundpod jute leaf is put into pulverizer, 35min is crushed, obtains roundpod jute leaf crushed material, be by roundpod jute leaf crushed material, mass fraction
5% sodium hydroxide solution is after 1 ︰ 7 is mixed, to be put into reaction kettle, be heated to 55 DEG C, be stirred to react in mass ratio
17min obtains alkali leaching product；
Above-mentioned alkali is soaked into aqueous isopropanol that sodium hydroxide solution, mass fraction that product, mass fraction are 30% are 40% by matter
It after amount for 7 ︰, 7 ︰ 1 than mixing, is put into stirring instrument, with the revolving speed of 500r/min, is stirred to react 25min, obtain pretreatment object, it is standby
With；
Tomato skin is collected, tomato skin is put into tissue pulverizer, with the revolving speed of 600r/min, 12min is crushed, obtains tomato skin
The ethanol solution that tomato skin crushed material, mass fraction are 30% is after 2 ︰ 5 are mixed, to be put into stirring instrument by crushed material in mass ratio
In, after stirring 17min, filtering is stood, collects filtrate；
In mass ratio it is to obtain fermentation substrate after 1 ︰ 2 is mixed by spare pretreatment object, above-mentioned filtrate, fermentation substrate is put into fermentation
In tank, and the bed-silt of addition fermentation substrate quality 7% and the distilled water of fermentation substrate quality 5% into fermentor, in temperature
It under conditions of degree is 25 DEG C, is sealed by fermentation 1 week, discharging, obtains modified tossa, it is spare；
The preparation of mixture:
Rice husk is put into pulverizer, 25min is crushed, obtains rice husk crushed material, it is 5% that rice husk crushed material, which is put into mass fraction,
Sodium hydroxide solution in impregnate 25min after, pour into high temperature and pressure cooker, be 190 DEG C in temperature, pressure is 1.7MPa
Under the conditions of, high temperature and pressure boiling 2h obtains mixed liquor；
It is in mass ratio after 2 ︰, 2 ︰ 5 is mixed, to pour into and subtract by the sodium hydroxide solution that above-mentioned mixed liquor, phenol, mass fraction are 2%
It presses in distilling apparatus, is 95 DEG C in temperature, under conditions of pressure is 900Pa, is evaporated under reduced pressure 45min, obtains mixture；
The preparation of ageing-resistant Wood plastic composite:
It is in mass ratio to be put into stirring instrument after 2 ︰ 3 are mixed, stir 35min by spare modified tossa, said mixture
Afterwards, extrusion forming in extruder is poured into, discharges, is cooled to room temperature to get ageing-resistant Wood plastic composite.
Example 3
The preparation of modified tossa:
Roundpod jute leaf is put into pulverizer, 40min is crushed, obtains roundpod jute leaf crushed material, be by roundpod jute leaf crushed material, mass fraction
5% sodium hydroxide solution is after 1 ︰ 7 is mixed, to be put into reaction kettle, be heated to 60 DEG C, be stirred to react in mass ratio
20min obtains alkali leaching product；
Above-mentioned alkali is soaked into aqueous isopropanol that sodium hydroxide solution, mass fraction that product, mass fraction are 30% are 40% by matter
It after amount for 7 ︰, 7 ︰ 1 than mixing, is put into stirring instrument, with the revolving speed of 600r/min, is stirred to react 30min, obtain pretreatment object, it is standby
With；
Tomato skin is collected, tomato skin is put into tissue pulverizer, with the revolving speed of 700r/min, 15min is crushed, obtains tomato skin
The ethanol solution that tomato skin crushed material, mass fraction are 30% is after 2 ︰ 5 are mixed, to be put into stirring instrument by crushed material in mass ratio
In, after stirring 20min, filtering is stood, collects filtrate；
In mass ratio it is to obtain fermentation substrate after 1 ︰ 2 is mixed by spare pretreatment object, above-mentioned filtrate, fermentation substrate is put into fermentation
In tank, and the bed-silt of addition fermentation substrate quality 8% and the distilled water of fermentation substrate quality 6% into fermentor, in temperature
It under conditions of degree is 30 DEG C, is sealed by fermentation 2 weeks, discharging, obtains modified tossa, it is spare；
The preparation of mixture:
Rice husk is put into pulverizer, 30min is crushed, obtains rice husk crushed material, it is 5% that rice husk crushed material, which is put into mass fraction,
Sodium hydroxide solution in impregnate 30min after, pour into high temperature and pressure cooker, be 200 DEG C in temperature, pressure is 1.8MPa
Under the conditions of, high temperature and pressure boiling 2h obtains mixed liquor；
It is in mass ratio after 2 ︰, 2 ︰ 5 is mixed, to pour into and subtract by the sodium hydroxide solution that above-mentioned mixed liquor, phenol, mass fraction are 2%
It presses in distilling apparatus, is 100 DEG C in temperature, under conditions of pressure is 1000Pa, is evaporated under reduced pressure 50min, obtains mixture；
The preparation of ageing-resistant Wood plastic composite:
It is in mass ratio to be put into stirring instrument after 2 ︰ 3 are mixed, stir 40min by spare modified tossa, said mixture
Afterwards, extrusion forming in extruder is poured into, discharges, is cooled to room temperature to get ageing-resistant Wood plastic composite.
Comparative example 1: it is essentially identical with the preparation method of example 2, it has only the difference is that lacking modified tossa.
Comparative example 2: it is essentially identical with the preparation method of example 2, it has only the difference is that lacking mixture.
Comparative example 3: the ageing-resistant Wood plastic composite of Shandong company production.
Ageing-resistant experiment: the Wood plastic composite in example 1~3 and comparative example is placed at 90 DEG C and carries out thermo-oxidative ageing
3000h and after being placed on ultraviolet light and aging 2000h, measures each static bending strength conservation rate.
Tensile strength test is detected using Wood plastic composite tensile strength test machine.
1 performance measurement result of table
| Test item | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Tensile strength (MPa) | 16.8 | 17.2 | 17.5 | 10.2 | 12.4 | 12.6 |
| At 90 DEG C after thermo-oxidative ageing 3000h, static bending strength conservation rate (%) | 93.4 | 93.8 | 94.1 | 84.3 | 75.3 | 82.4 |
| After ultraviolet light and aging 2000h, static bending strength conservation rate (%) | 94.1 | 94.5 | 94.7 | 82.3 | 78.9 | 81.3 |
It is high according to the tensile strength of the ageing-resistant Wood plastic composite produced by the present invention of data among the above, after thermo-oxidative ageing and
Static bending strength conservation rate after ultraviolet light and aging is high compared to common Wood plastic composite, illustrates that ageing-resistant performance is good, uses the longevity
Life length, has broad application prospects.
Claims (8)
1. a kind of preparation method of ageing-resistant Wood plastic composite, it is characterised in that specific preparation step are as follows:
It is in mass ratio to be put into stirring instrument, after stirring 30~40min, after 2 ︰ 3 are mixed by modified tossa, mixture
Enter extrusion forming in extruder, discharges, be cooled to room temperature to get ageing-resistant Wood plastic composite；
The specific preparation step of modification tossa are as follows:
(1) roundpod jute leaf is put into pulverizer, crushes 30~40min, roundpod jute leaf crushed material is obtained, by roundpod jute leaf crushed material, matter
After measuring the sodium hydroxide solution mixing that score is 5%, it is put into reaction kettle, is heated to 50~60 DEG C, it is stirred to react 15~
20min obtains alkali leaching product；
(2) above-mentioned alkali the aqueous isopropanol that product, the sodium hydroxide solution that mass fraction is 30%, mass fraction are 40% is soaked to mix
It after conjunction, is put into stirring instrument, with the revolving speed of 400~600r/min, is stirred to react 20~30min, obtain pretreatment object, it is spare；
(3) tomato skin is collected, tomato skin is put into tissue pulverizer, with the revolving speed of 500~700r/min, crush 10~
15min obtains tomato skin crushed material, after tomato skin crushed material, the ethanol solution that mass fraction is 30% are mixed, is put into stirring
In instrument, after stirring 15~20min, filtering is stood, collects filtrate；
(4) in mass ratio it is to obtain fermentation substrate after 1 ︰ 2 is mixed by spare pretreatment object, above-mentioned filtrate, fermentation substrate is put into
In fermentor, and into fermentor be added fermentation substrate quality 6~8% bed-silt and fermentation substrate quality 4~6% steaming
Distilled water is sealed by fermentation 1~2 week under conditions of temperature is 20~30 DEG C, discharging, obtains modified tossa, spare；
The specific preparation step of the mixture are as follows:
(1) rice husk is put into pulverizer, crushes 20~30min, obtains rice husk crushed material, rice husk crushed material is put into quality point
After number is impregnates 20~30min in 5% sodium hydroxide solution, pour into high temperature and pressure cooker, high temperature and pressure 1~2h of boiling,
Obtain mixed liquor；
(2) it after mixing above-mentioned mixed liquor, phenol, the sodium hydroxide solution that mass fraction is 2%, pours into vacuum distillation apparatus,
It is 90~100 DEG C in temperature, under conditions of pressure is 800~1000Pa, is evaporated under reduced pressure 40~50min, obtains mixture.
2. a kind of preparation method of ageing-resistant Wood plastic composite according to claim 1, it is characterised in that: described changes
Property tossa, mixture mixing mass ratio be 2 ︰ 3.
3. a kind of preparation method of ageing-resistant Wood plastic composite according to claim 1, it is characterised in that: described changes
Property the specific preparation step of tossa (1) in roundpod jute leaf crushed material, the sodium hydroxide solution mixing mass ratio that mass fraction is 5%
For 1 ︰ 7.
4. a kind of preparation method of ageing-resistant Wood plastic composite according to claim 1, it is characterised in that: described changes
Property the specific preparation step of tossa (2) in alkali leaching product, mass fraction be 30% sodium hydroxide solution, mass fraction 40%
Aqueous isopropanol mixing mass ratio be 7 ︰, 7 ︰ 1.
5. a kind of preparation method of ageing-resistant Wood plastic composite according to claim 1, it is characterised in that: described changes
The ethanol solution mixing mass ratio that tomato skin crushed material, mass fraction are 30% in the property specific preparation step of tossa (3) is 2 ︰
5。
6. a kind of preparation method of ageing-resistant Wood plastic composite according to claim 1, it is characterised in that: described changes
Property the specific preparation step of tossa (4) in pretreatment object, above-mentioned filtrate mixing mass ratio be 1 ︰ 2, the bed-silt being added
And the quality of distilled water is preferably fermentation substrate quality 6~8%, 4~6%.
7. a kind of preparation method of ageing-resistant Wood plastic composite according to claim 1, it is characterised in that: described is mixed
It is 180~200 DEG C that the specific preparation step of object (1) high temperature autoclaving tank, which is closed, in temperature, and pressure is the condition of 1.6~1.8MPa
Lower progress.
8. a kind of preparation method of ageing-resistant Wood plastic composite according to claim 1, it is characterised in that: described is mixed
Closing the sodium hydroxide solution mixing mass ratio that mixed liquor, phenol, mass fraction are 2% in the specific preparation step of object (2) is 2 ︰, 2 ︰ 5.
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| CN111546459A (en) * | 2020-03-27 | 2020-08-18 | 安徽紫荆花壁纸股份有限公司 | Preparation method of wall decoration plate |
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| CN111546459B (en) * | 2020-03-27 | 2022-05-03 | 安徽紫荆花壁纸股份有限公司 | Preparation method of wall decoration plate |
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