CN109021352A - The method for preparing composite material based on wheat straw fibre surface treatment - Google Patents
The method for preparing composite material based on wheat straw fibre surface treatment Download PDFInfo
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- CN109021352A CN109021352A CN201810680735.1A CN201810680735A CN109021352A CN 109021352 A CN109021352 A CN 109021352A CN 201810680735 A CN201810680735 A CN 201810680735A CN 109021352 A CN109021352 A CN 109021352A
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- wheat straw
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
Abstract
The invention discloses a kind of methods for preparing composite material based on wheat straw fibre surface treatment, step 1, wheat straw fibre surface treatment, configure treatment fluid, handle wheat straw fibre with treatment fluid, cleaned wheat straw fibre, the wheat straw fibre after dry cleaning；Step 2 is kneaded, and the wheat straw fibre that step 2 is obtained is crushed to 50-60 mesh, high density polyethylene (HDPE) is crushed to 2-6 mesh, weighs wheat straw fibre and high density polyethylene (HDPE) in proportion, is placed in mixing in kneading machine and is obtained blend；Step 3, injection molding, the blend that step 3 is obtained are crushed to 2-6 mesh, dry to water content 3% hereinafter, being placed in injection molding machine injection molding to get composite material.The composite property that the present invention is prepared through the wheat straw fibre of tri- kinds of zytase, lipase, coupling agent A-172 combined processings is best, this surface treatment method solves the problems, such as wheat straw fibre and matrix high density polyethylene (HDPE) poor compatibility, improves the overall performance of composite material.
Description
Technical field
The invention belongs to fibre reinforced composites preparation technical fields, and in particular to be surface-treated based on wheat straw fibre
The method for preparing composite material.
Background technique
Plant fiber reinforced thermoplastics composite material is a kind of environmental type composite material, be by plant fiber with
Thermoplastic is prepared by way of hot pressing, extruding or injection, has good corrosion resistance, ageing resistance, low suction
Aqueous, easy processing molding and degradability.It is widely used in building, furniture, packed and transported field, alternative timber, section
The about use of timber resources.But since plant fiber is polar molecule, containing a large amount of polar functional group, and thermoplastic is
Nonpolar molecule, although in high-temperature blending mixture can be reached by the molten condition of thermoplastic, by micro-
There is obvious boundary between the two, the performance of composite material caused not reach requirement in observation, discovery.
Summary of the invention
The object of the present invention is to provide a kind of methods for preparing composite material based on wheat straw fibre surface treatment, solve
Plant fiber reinforced plastics composite material poor compatibility existing in the prior art causes composite property not reach requirement
Problem.
The technical scheme adopted by the invention is that based on the method that wheat straw fibre surface treatment prepares composite material, it is right
Wheat straw fibre is surface-treated, and treated wheat straw fibre and high density polyethylene (HDPE) are placed in mixing in kneading machine and are obtained
Blend is put into injection molding machine injection molding up to composite material by blend.
The features of the present invention also characterized in that:
It is specifically implemented according to the following steps:
Step 1, wheat straw fibre surface treatment, configure treatment fluid, wheat straw fibre are handled with treatment fluid, to treated
Wheat straw fibre cleaned, drying process；
Step 2 is kneaded, and the wheat straw fibre that step 1 is obtained is crushed to 50-60 mesh, high density polyethylene (HDPE) is crushed to
2-6 mesh, weighs wheat straw fibre and high density polyethylene (HDPE) in proportion, is placed in mixing in kneading machine and obtains blend；
Step 3, injection molding, the blend that step 2 is obtained is crushed to 2-6 mesh, dry to water content 3% hereinafter, being placed in
Injection molding is in injection molding machine to get composite material.
Step 1 is specifically implemented according to the following steps:
Step 1.1, configuration wheat straw fibre treatment fluid, with deionized water, citric acid and sodium citrate configuration pH be 4.5~
Buffer solution is heated to 40 DEG C~50 DEG C and keeps constant temperature by 6.5 buffer solution, weighs inorganic agent and buffer solution is added, stir
Mixing is uniformly mixed it；
Step 1.2, processing wheat straw fibre weigh the wheat straw fibre below of water content 3% and are added what step 1.1 obtained
In wheat straw fibre treatment fluid, 4.5h~5.5h is handled；
The wheat straw fibre that step 1.2 processing obtains is placed on the sieve of 200 mesh, uses deionization by step 1.3, cleaning
Water cleans repeatedly, until the pH for obtaining the supernatant liquor of cleaning solution is 6.5~7.5；
Step 1.4, dry, the wheat straw fibre drying that step 1.3 is obtained to 3% or less water content.
Inorganic agent in step 1.1 is specially zytase, in step 1.1 in buffer solution, zytase and step 1.2
The mass ratio of wheat straw fibre is followed successively by (1000-2000): (0.1-1.0): (60-100).
Inorganic agent in step 1.1 is specially lipase, wheat straw in buffer solution, lipase and step 1.2 in step 1.1
The mass ratio of stalk fiber is followed successively by (1000-2000): (0.5-1.5): (60-100).
Detailed process is as follows for step 1:
Coupling agent A-172 is claimed to be dissolved in a certain amount of dehydrated alcohol, stirring, which is uniformly mixed it, obtains treatment fluid；It will processing
Liquid is uniformly sprayed at the wheat straw fibre surface below of water content 3%, comes into full contact with treatment fluid with wheat straw fibre；It will processing
Wheat straw fibre afterwards is dry to 3% or less water content；Wherein, the quality of dehydrated alcohol, coupling agent A-172, wheat straw fibre
Than being followed successively by (600-1000): (2-4): 100.
Detailed process is as follows for step 1:
Step 1.1, xylanase treatment wheat straw fibre are 4.5 with deionized water, citric acid and sodium citrate configuration pH
~6.5 buffer solution a, buffer solution a is put into digital display thermostat water bath, is heated to 40 DEG C~50 DEG C and is kept constant temperature；
Weigh zytase be added buffer solution a in stirring make its be uniformly mixed obtain treatment fluid a；Weigh the wheat below of water content 3%
Treatment fluid a is added in stalk fibre, handles 4.5~5.5h；By treated, wheat straw fibre is taken out, and is placed on the sieve of 200 mesh,
It is cleaned repeatedly with deionized water, until the pH for obtaining the supernatant liquor of cleaning solution is 6.5~7.5；Wheat Straw after cleaning is fine
Dimension is dry to 3% or less water content；Wherein, buffer solution a, zytase, wheat straw fibre mass ratio be followed successively by (1000-
2000):(0.1-1.0):(60-100)；
Step 1.2, lipase treatment wheat straw fibre, with deionized water, citric acid and sodium citrate configuration pH be 4.5~
6.5 buffer solution b, buffer solution b is put into digital display thermostat water bath, is heated to 40 DEG C~50 DEG C and is kept constant temperature；Claim
Take lipase be added buffer solution b in stirring make its be uniformly mixed obtain treatment fluid b；Weigh step 1.1 treated Wheat Straw
Treatment fluid b is added in fiber, handles 4.5~5.5h；By treated, wheat straw fibre is taken out, and is placed on the sieve of 200 mesh, is spent
Ionized water cleans repeatedly, until the PH for obtaining the supernatant liquor of cleaning solution is 6.5~7.5；Wheat straw fibre after cleaning is set
It is dry to 3% or less water content in vacuum oven；Wherein, buffer solution b, lipase, wheat straw fibre mass ratio successively
For (1000-2000): (0.5-1.5): (60-100)；
Step 1.3, coupling agent A-172 handle wheat straw fibre, weigh coupling agent A-172 and are dissolved in dehydrated alcohol, stir
It is uniformly mixed it and obtains treatment fluid c；Treatment fluid c is uniformly sprayed at step 1.2 treated wheat straw fibre surface, makes to locate
Reason liquid comes into full contact with wheat straw fibre；By treated, wheat straw fibre is dry to 3% or less water content；Wherein, anhydrous second
Alcohol, coupling agent A-172, wheat straw fibre mass ratio be followed successively by (600-1000): (2-4): 100.
In step 2, the mass ratio of high density polyethylene (HDPE) and wheat straw fibre is 30%:70%, melting temperature 150-155
DEG C, the revolving speed of kneading machine is 10rpm.
In step 3, injection temperature is 150 ± 2 DEG C, injection pressure 100bar.
The beneficial effects of the present invention are:
The present invention is based on the method that wheat straw fibre surface treatment prepares composite material, zytase, lipase, coupling agents
A kind of composite material of the composite property than not handling wheat straw fibre preparation of the wheat straw fibre preparation of processing in A-172
Performance is good；Zytase, lipase, two kinds of processing wheat straw fibres in coupling agent A-172 are than one of processing Wheat Straw
The performance of the composite material of fiber preparation is good；Zytase, lipase, coupling agent A-172 combined processing wheat straw fibre system
Standby composite material is better than the performance of the composite material for the wheat straw fibre preparation that two of them is handled；The wheat of three kinds of combined processings
The composite material of stalk fibre preparation, tensile strength reach 24.40MPa, and bending strength reaches 34.68MPa, and bending modulus reaches
To 1986.29MPa, water absorption rate reaches 0.58%.This surface treatment method solves wheat straw fibre and matrix high density is poly-
The problem of ethylene poor compatibility, improves the overall performance of composite material.
Specific embodiment
The present invention is described in detail With reference to embodiment.
Embodiment 1
Weigh the wheat straw fibre of 10g water content 3% and the high density polyethylene (HDPE) of 90g；Wheat straw fibre is crushed to 60
High density polyethylene (HDPE) is crushed to 4 mesh, wheat straw fibre and high density polyethylene (HDPE) is put into kneading machine and are kneaded 5min by mesh, is mixed
Refining temperature is 153 DEG C, and the revolving speed of kneading machine is 10rpm, obtains blend；Blend is crushed to 4 mesh, is placed in vacuum drying
Case is dry to water content 3%, blend is poured into injection molding in vertical injection molding machine, injection temperature is 150 DEG C, injection pressure
100bar；Standard sample A is taken out after cooling.
Embodiment 2:
Same as Example 1, difference is only that, the high density of the wheat straw fibre and 80g that weigh 20g water content 2% is poly-
Ethylene；Standard sample B is taken out after cooling.
Embodiment 3:
Same as Example 1, difference is only that, the high density of the wheat straw fibre and 70g that weigh 30g water content 1% is poly-
Ethylene；Standard sample C is taken out after cooling.
Embodiment 4:
Same as Example 1, difference is only that, the high density of the wheat straw fibre and 60g that weigh 40g water content 1% is poly-
Ethylene；Standard sample D is taken out after cooling.
Embodiment 5:
Same as Example 1, difference is only that, weighs the wheat straw fibre of 50g water content 0.5% and the high density of 50g
Polyethylene；Standard sample E is taken out after cooling.
Mechanics Performance Testing is carried out to standard sample A, B, C, D, E that embodiment 1-5 is obtained, it is specifically tested and stretches by force
Degree, bending strength, bending modulus, the data measured are as shown in table 1:
Table 1
Conclusion: downward trend is presented with the increase of wheat straw fibre mass percent in the tensile strength of composite material, and
Ascendant trend is presented in bending strength and bending modulus always.Comprehensively consider in terms of economic benefit and mechanical performance two, determines choosing
Take wheat straw fibre 30%, high density polyethylene (HDPE) 70%.
Condition 1: the buffer solution 1000ml for being 5 with deionized water, citric acid and sodium citrate configuration pH, by buffer solution
It is put into digital display thermostat water bath, is heated to 50 DEG C and keeps constant temperature；It weighs 0.3g zytase and pours into buffer solution and stir
10min is uniformly mixed it, obtains treatment fluid；The wheat straw fibre of 60g water content 3% is added in treatment fluid, handles 5h；It takes
The wheat straw fibre handled well out is placed on the sieve of 200 mesh, is cleaned repeatedly with deionized water, until obtaining cleaning solution
The pH value of supernatant liquor is close to 7；It is dry to water content 3% that cleaned wheat straw fibre is put in vacuum oven.
Condition 1 ': identical as condition 1, difference is only that, buffer preparation 1500ml, and pH is 4.5, and buffer solution adds
Heat is to 40 DEG C and keeps constant temperature；Zytase weighs 0.1g；The wheat straw fibre of 80g water content 2% is added in treatment fluid；Clearly
Washed wheat straw fibre is dry to water content 2%.
Condition 1 ": identical as condition 1, difference is only that, buffer preparation 2000ml, and pH is 6.5, and buffer solution adds
Heat is to 45 DEG C and keeps constant temperature；Zytase weighs 1g；The wheat straw fibre of 100g water content 1% is added in treatment fluid；Clearly
Washed wheat straw fibre is dry to water content 1%.
Condition 2: the buffer solution 1000ml for being 6 with deionized water, citric acid and sodium citrate configuration pH, by buffer solution
It is put into digital display thermostat water bath, is heated to 40 DEG C and keeps constant temperature；The lipase for weighing 0.6g is poured into buffer solution and is stirred
Mixing 10min is uniformly mixed it, obtains treatment fluid；The wheat straw fibre of 60g water content 3% is added in treatment fluid, handles 5h；
The wheat straw fibre handled well is taken out, is placed on the sieve of 200 mesh, is cleaned repeatedly with deionized water, until obtaining cleaning solution
Supernatant liquor pH value close to 7；It is dry to water content 3% that cleaned wheat straw fibre is put in vacuum oven.
Condition 2 ': identical as condition 2, difference is only that, buffer preparation 1500ml, and pH is 5.5, and buffer solution adds
Heat is to 40 DEG C and keeps constant temperature；Lipase weighs 0.5g；The wheat straw fibre of 80g water content 2% is added in treatment fluid；Clear
It is dry to water content 2% that washed wheat straw fibre is put in vacuum oven.
Condition 2 ": identical as condition 2, difference is only that, buffer preparation 2000ml, and pH is 6.5, and buffer solution adds
Heat is to 45 DEG C and keeps constant temperature；Lipase weighs 1.5g；The wheat straw fibre of 100g water content 1% is added in treatment fluid；?
It is dry to water content 1% that cleaned wheat straw fibre is put in vacuum oven.
Condition 3: the coupling agent A-172 for weighing 3g is dissolved in the dehydrated alcohol of 600g, and stirring is uniformly mixed it, is handled
Treatment fluid is uniformly sprayed on wheat straw fibre with watering can, comes into full contact with treatment fluid with wheat straw fibre by liquid；After handling
Wheat straw fibre be put into drying box and dry to water content 3%.
Condition 3 ': identical as condition 3, difference is only that, the coupling agent A-172 for weighing 2g is dissolved in the dehydrated alcohol of 800g；
The wheat straw fibre of 100g water content 2% is added in treatment fluid；Cleaned wheat straw fibre is put in vacuum oven to do
It is dry to water content 2%.
Condition 3 ": identical as condition 3, difference is only that, the coupling agent A-172 for weighing 4g is dissolved in the dehydrated alcohol of 1000g；
The wheat straw fibre of 100g water content 1% is added in treatment fluid；Cleaned wheat straw fibre is put in vacuum oven to do
It is dry to water content 1%.
Condition 4: 30g wheat straw fibre and the high density polyethylene (HDPE) of 70g are weighed；Wheat straw fibre is crushed to 60 mesh, it will
High density polyethylene (HDPE) is crushed to 4 mesh, and wheat straw fibre and high density polyethylene (HDPE) are put into kneading machine and are kneaded 5min, melting temperature
It is 153 DEG C, the revolving speed of kneading machine is 10rpm, obtains blend；Blend is crushed to 4 mesh, it is dry to be placed in vacuum oven
To water content 3%, blend is poured into injection molding in vertical injection molding machine, injection temperature is 150 DEG C, injection pressure 100bar；
Standard sample is taken out after cooling.
Condition 4 ': 30g wheat straw fibre and the high density polyethylene (HDPE) of 70g are weighed；Wheat straw fibre is crushed to 50 mesh, it will
High density polyethylene (HDPE) is crushed to 2 mesh, and wheat straw fibre and high density polyethylene (HDPE) are put into kneading machine and are kneaded 5min, melting temperature
It is 150 DEG C, the revolving speed of kneading machine is 10rpm, obtains blend；Blend is crushed to 2 mesh, it is dry to be placed in vacuum oven
To water content 2%, blend is poured into injection molding in vertical injection molding machine, injection temperature is 148 DEG C, injection pressure 100bar；
Standard sample is taken out after cooling.
Condition 4 ": weigh 30g wheat straw fibre and the high density polyethylene (HDPE) of 70g；Wheat straw fibre is crushed to 55 mesh, it will
High density polyethylene (HDPE) is crushed to 6 mesh, and wheat straw fibre and high density polyethylene (HDPE) are put into kneading machine and are kneaded 5min, melting temperature
It is 155 DEG C, the revolving speed of kneading machine is 10rpm, obtains blend；Blend is crushed to 6 mesh, it is dry to be placed in vacuum oven
To water content 1%, blend is poured into injection molding in vertical injection molding machine, injection temperature is 152 DEG C, injection pressure 100bar；
Standard sample is taken out after cooling.
Embodiment 6:
Condition 1+ condition 4；Standard sample F is taken out after cooling.
Embodiment 7:
Condition 1 '+condition 4 '；Standard sample G is taken out after cooling.
Embodiment 8:
Condition 1 "+condition 4 "；Standard sample H is taken out after cooling.
Embodiment 9:
Condition 2+ condition 4；Standard sample I is taken out after cooling.
Embodiment 10:
Condition 2 '+condition 4 '；Standard sample J is taken out after cooling.
Embodiment 11:
Condition 2 "+condition 4 "；Standard sample K is taken out after cooling.
Embodiment 12:
Condition 3+ condition 4；Standard sample L is taken out after cooling.
Embodiment 13:
Condition 3 '+condition 4 '；Standard sample M is taken out after cooling.
Embodiment 14:
Condition 3 "+condition 4 "；Standard sample N is taken out after cooling.
Embodiment 15:
Condition 1+ condition 2+ condition 4；Standard sample O is taken out after cooling.
Embodiment 16:
Condition 1 '+condition 2 '+condition 4 '；Standard sample P is taken out after cooling.
Embodiment 17:
Condition 1 "+condition 2 "+condition 4 "；Standard sample Q is taken out after cooling.
Embodiment 18:
Condition 1+ condition 3+ condition 4；Standard sample R is taken out after cooling.
Embodiment 19:
Condition 1 '+condition 3 '+condition 4 '；Standard sample S is taken out after cooling.
Embodiment 20:
Condition 1 "+condition 3 "+condition 4 "；Standard sample T is taken out after cooling.
Embodiment 21:
Condition 2+ condition 3+ condition 4；Standard sample U is taken out after cooling.
Embodiment 22:
Condition 2 '+condition 3 '+condition 4 '；Standard sample V is taken out after cooling.
Embodiment 23:
Condition 2 "+condition 3 "+condition 4 "；Standard sample W is taken out after cooling.
Embodiment 24:
Condition 1+ condition 2+ condition 3+ condition 4；Standard sample X is taken out after cooling.
Embodiment 25:
Condition 1 '+condition 2 '+condition 3 '+condition 4 '；Standard sample Y is taken out after cooling.
Embodiment 26:
Condition 1 "+condition 2 "+condition 3 "+condition 4 "；Standard sample Z is taken out after cooling.
The standard sample obtained to embodiment 6-14 carries out Mechanics Performance Testing, i.e. test tensile strength, bending strength, curved
Bent modulus, the data measured are as shown in table 2:
Table 2
Conclusion: zytase, lipase, a kind of composite material of the wheat straw fibre preparation of processing in coupling agent A-172
Performance is better than the composite property for not handling wheat straw fibre preparation；Zytase, lipase, two in coupling agent A-172
Kind processing wheat straw fibre is better than the performance of the composite material of one of processing wheat straw fibre preparation；Zytase, fat
Enzyme, coupling agent A-172 combined processing wheat straw fibre preparation composite material than wheat straw fibre system that two of them is handled
The performance of standby composite material is good；The composite material of the wheat straw fibre preparation of three kinds of combined processings, tensile strength reach
24.40MPa, bending strength reach 34.68MPa, and bending modulus reaches 1986.29MPa, and water absorption rate reaches 0.58%.This table
Surface treatment method solves the problems, such as wheat straw fibre and matrix high density polyethylene (HDPE) poor compatibility, improves the whole of composite material
Body performance.
The present invention is based on the method that wheat straw fibre surface treatment prepares composite material, coupling agent is last when combined processing
Addition, because cellulase treatment is carried out under acidic buffer solution, if first using coupling agent treatment, coupling agent grafting
On fiber, after biological enzyme acid solution immersion treatment, it may be made to generate gelatin phenomenon, will lead to modified effect change
Difference.
Claims (9)
1. the method for preparing composite material based on wheat straw fibre surface treatment, which is characterized in that carry out table to wheat straw fibre
Treated wheat straw fibre and high density polyethylene (HDPE) are placed in be kneaded in kneading machine and obtain blend, by blend by surface treatment
Injection molding is put into injection molding machine up to composite material.
2. the method for preparing composite material based on wheat straw fibre surface treatment as described in claim 1, which is characterized in that tool
Body follows the steps below to implement:
Step 1, wheat straw fibre surface treatment, configure treatment fluid, wheat straw fibre are handled with treatment fluid, to treated wheat straw
Stalk fiber cleaned, drying process；
Step 2 is kneaded, and the wheat straw fibre that step 1 is obtained is crushed to 50-60 mesh, high density polyethylene (HDPE) is crushed to 2-6
Mesh weighs wheat straw fibre and high density polyethylene (HDPE) in proportion, is placed in mixing in kneading machine and obtains blend；
Step 3, injection molding, the blend that step 2 is obtained is crushed to 2-6 mesh, dry to water content 3% hereinafter, being placed in injection molding
Injection molding is in machine to get composite material.
3. the method for preparing composite material based on wheat straw fibre surface treatment as claimed in claim 2, which is characterized in that institute
Step 1 is stated to be specifically implemented according to the following steps:
Step 1.1, configuration wheat straw fibre treatment fluid are 4.5~6.5 with deionized water, citric acid and sodium citrate configuration pH
Buffer solution, buffer solution is heated to 40 DEG C~50 DEG C and keeps constant temperature, inorganic agent is weighed and buffer solution is added, stirring makes
It is uniformly mixed；
Step 1.2, processing wheat straw fibre weigh the wheat straw fibre below of water content 3% and the wheat straw that step 1.1 obtains are added
In stalk fiber treatment fluid, 4.5h~5.5h is handled；
The wheat straw fibre that step 1.2 processing obtains is placed on the sieve of 200 mesh by step 1.3, cleaning, anti-with deionized water
Multiple cleaning, until the pH for obtaining the supernatant liquor of cleaning solution is 6.5~7.5；
Step 1.4, dry, the wheat straw fibre drying that step 1.3 is obtained to 3% or less water content.
4. the method according to claim 3 for preparing composite material based on wheat straw fibre surface treatment, which is characterized in that
Inorganic agent in the step 1.1 is specially zytase, wheat straw in buffer solution, zytase and step 1.2 in step 1.1
The mass ratio of stalk fiber is followed successively by (1000-2000): (0.1-1.0): (60-100).
5. the method according to claim 3 for preparing composite material based on wheat straw fibre surface treatment, which is characterized in that
Inorganic agent in the step 1.1 is specially lipase, and Wheat Straw is fine in buffer solution, lipase and step 1.2 in step 1.1
The mass ratio of dimension is followed successively by (1000-2000): (0.5-1.5): (60-100).
6. the method for preparing composite material based on wheat straw fibre surface treatment as claimed in claim 2, which is characterized in that institute
Stating step 1, detailed process is as follows:
Coupling agent A-172 is claimed to be dissolved in a certain amount of dehydrated alcohol, stirring, which is uniformly mixed it, obtains treatment fluid；Treatment fluid is equal
It is even to be sprayed at the wheat straw fibre surface below of water content 3%, come into full contact with treatment fluid with wheat straw fibre；By treated
Wheat straw fibre is dry to 3% or less water content；Wherein, dehydrated alcohol, coupling agent A-172, wheat straw fibre mass ratio according to
Secondary is (600-1000): (2-4): 100.
7. the method for preparing composite material based on wheat straw fibre surface treatment as claimed in claim 2, which is characterized in that institute
Stating step 1, detailed process is as follows:
Step 1.1, xylanase treatment wheat straw fibre, with deionized water, citric acid and sodium citrate configuration pH be 4.5~
6.5 buffer solution a, buffer solution a is put into digital display thermostat water bath, is heated to 40 DEG C~50 DEG C and is kept constant temperature；Claim
Take zytase be added buffer solution a in stirring make its be uniformly mixed obtain treatment fluid a；Weigh the wheat straw below of water content 3%
Treatment fluid a is added in stalk fiber, handles 4.5~5.5h；By treated, wheat straw fibre is taken out, and is placed on the sieve of 200 mesh, is used
Deionized water is cleaned repeatedly, until the pH for obtaining the supernatant liquor of cleaning solution is 6.5~7.5；By the wheat straw fibre after cleaning
It dries to 3% or less water content；Wherein, buffer solution a, zytase, wheat straw fibre mass ratio be followed successively by (1000-
2000):(0.1-1.0):(60-100)；
Step 1.2, lipase treatment wheat straw fibre are 4.5~6.5 with deionized water, citric acid and sodium citrate configuration pH
Buffer solution b, buffer solution b is put into digital display thermostat water bath, 40 DEG C~50 DEG C is heated to and keeps constant temperature；Weigh rouge
Stirring in fat enzyme addition buffer solution b, which is uniformly mixed it, obtains treatment fluid b；Weigh step 1.1 treated wheat straw fibre
Treatment fluid b is added, handles 4.5~5.5h；By treated, wheat straw fibre is taken out, and is placed on the sieve of 200 mesh, is used deionization
Water cleans repeatedly, until the PH for obtaining the supernatant liquor of cleaning solution is 6.5~7.5；Wheat straw fibre after cleaning is placed in very
Empty drying box is dry to 3% or less water content；Wherein, buffer solution b, lipase, wheat straw fibre mass ratio be followed successively by
(1000-2000):(0.5-1.5):(60-100)；
Step 1.3, coupling agent A-172 handle wheat straw fibre, weigh coupling agent A-172 and are dissolved in dehydrated alcohol, and stirring makes it
It is uniformly mixed and obtains treatment fluid c；Treatment fluid c is uniformly sprayed at step 1.2 treated wheat straw fibre surface, makes treatment fluid
It is come into full contact with wheat straw fibre；By treated, wheat straw fibre is dry to 3% or less water content；Wherein, dehydrated alcohol, idol
Join agent A-172, the mass ratio of wheat straw fibre is followed successively by (600-1000): (2-4): 100.
8. the method for preparing composite material based on wheat straw fibre surface treatment as claimed in claim 2, which is characterized in that institute
It states in step 2, the mass ratio of high density polyethylene (HDPE) and wheat straw fibre is 30%:70%, and melting temperature is 150-155 DEG C, is mixed
The revolving speed of mill is 10rpm.
9. the method for preparing composite material based on wheat straw fibre surface treatment as claimed in claim 2, which is characterized in that institute
It states in step 3, injection temperature is 150 ± 2 DEG C, injection pressure 100bar.
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| CN112029168A (en) * | 2020-08-11 | 2020-12-04 | 西安理工大学 | Preparation method of waste tobacco stalk fiber reinforced resin matrix composite material |
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