CN110092972A - A kind of waterproof powdered rice hulls wood plastic composite and preparation method thereof - Google Patents
A kind of waterproof powdered rice hulls wood plastic composite and preparation method thereof Download PDFInfo
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- CN110092972A CN110092972A CN201910455318.1A CN201910455318A CN110092972A CN 110092972 A CN110092972 A CN 110092972A CN 201910455318 A CN201910455318 A CN 201910455318A CN 110092972 A CN110092972 A CN 110092972A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F289/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups C08F251/00 - C08F287/00
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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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/004—Additives being defined by their length
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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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
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The present invention provides a kind of waterproof powdered rice hulls wood plastic composites and preparation method thereof, belong to wood plastic composite technical field.Waterproof powdered rice hulls wood plastic composite provided by the invention includes the raw material of following parts by weight: 100 parts of high density polyethylene (HDPE);Polymethyl methacrylate is modified 10~90 parts of powdered rice hulls;10~25 parts of glass fibre;2~10 parts of silane coupling agent;5~15 parts of polyethylene wax;3~10 parts of stearic acid;After the modified powdered rice hulls of the polymethyl methacrylate are by the raw material mixing of following parts by weight, polymerization reaction occurs and obtains: 100 parts of powdered rice hulls, 50~120 parts of methyl methacrylate, 0.04~0.1 part of initiator.The present invention is modified with polymethyl methacrylate by powdered rice hulls, effectively reduces the water imbibition of powdered rice hulls, while the modified powdered rice hulls of polymethyl methacrylate and other components cooperate, and also effectively increase the mechanical property of waterproof powdered rice hulls wood plastic composite.
Description
Technical field
The present invention relates to wood plastic composite technical field more particularly to a kind of waterproof powdered rice hulls wood plastic composite and its
Preparation method.
Background technique
Wood plastic composite be with wood-fibred or plant fiber filling, enhancing modified thermoplastic, it collect timber and
The advantages of plastics, has the appearance as natural timber, while its anti-corrosion and humidity resistance are better than timber, and size
Stability is high, and machinability is strong, can be cut, is bonded, is fixedly connected with nail or bolt, can also paint, and is a kind of new
Type environment-friendly type chemical materials can be used for the multiple fields such as automobile interior decoration, thermal insulation material, auto parts and components, interior decoration plate.
Since China is Rice Production big country, rice annual output position is at the forefront in the world, the residue powdered rice hulls of Rice Production
Annual output is about 36,000,000 tons.Use powdered rice hulls as the raw material of wood plastic composite, it is not only resourceful, and also ingredient is steady
It is fixed.But there are a large amount of associated state hydroxyls on the surface of powdered rice hulls, and the capillary of powdered rice hulls and microgap are more, so that powdered rice hulls
With stronger water imbibition, the water imbibition so as to cause powdered rice hulls wood plastic composite is larger, limits its application.
Summary of the invention
The purpose of the present invention is to provide a kind of waterproof powdered rice hulls wood plastic composite, waterproof powdered rice hulls provided by the invention
Wood plastic composite water imbibition is small, can be used as waterproof material use.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of waterproof powdered rice hulls wood plastic composite, the raw material including following parts by weight:
After the modified powdered rice hulls of the polymethyl methacrylate are by the raw material mixing of following parts by weight, polymerization reaction occurs and obtains
It arrives:
100 parts of powdered rice hulls, 50~120 parts of methyl methacrylate, 0.04~0.1 part of initiator.
Preferably, the waterproof powdered rice hulls wood plastic composite includes the raw material of following parts by weight:
Preferably, the glass fibre is long glass fibres;The length of the long glass fibres is 5~10mm.
Preferably, the silane coupling agent is vinyltriethoxysilane, γ-propyl methacrylate base trimethoxy
Silane or γ-(2,3- glycidyl) propyl trimethoxy silicane.
Preferably, the partial size of the powdered rice hulls is 60~80 mesh.
Preferably, the method for modifying of the modified powdered rice hulls of the polymethyl methacrylate includes the following steps:
Powdered rice hulls, initiator and methyl methacrylate are mixed, mixed liquor is obtained;
The mixed liquor is subjected to Microwave Emulsifier-Free Polymerization, obtains the modified powdered rice hulls of polymethyl methacrylate.
Preferably, the initiator is azodiisobutyronitrile, potassium peroxydisulfate or benzoyl peroxide.
Preferably, the frequency of the Microwave Emulsifier-Free Polymerization is 10~300GHz, and the temperature of the Microwave Emulsifier-Free Polymerization is 70~80 DEG C;Institute
The time for stating Microwave Emulsifier-Free Polymerization is 10~20min.
The present invention also provides a kind of preparation method of waterproof powdered rice hulls wood plastic composite described in above-mentioned technical proposal,
Include the following steps:
By high density polyethylene (HDPE), polymethyl methacrylate modified powdered rice hulls, glass fibre, silane coupling agent, polyethylene
After wax and stearic acid mixing, 120~160 DEG C are warming up to, after deaeration, is pressed and molded, it is multiple to obtain waterproof powdered rice hulls wood moulding
Condensation material.
Preferably, the pressure of the compression molding is 15~20MPa, dwell time of the compression molding is 10~
15min。
The present invention provides a kind of waterproof powdered rice hulls wood plastic composite, the raw material including following parts by weight: high density is poly-
100 parts of ethylene;Polymethyl methacrylate is modified 10~90 parts of powdered rice hulls;10~25 parts of glass fibre;Silane coupling agent 2~10
Part;5~15 parts of polyethylene wax;3~10 parts of stearic acid;The modified powdered rice hulls of the polymethyl methacrylate are by following parts by weight
After raw material mixing, polymerization reaction occurs and obtains: 100 parts of powdered rice hulls, 50~120 parts of methyl methacrylate, initiator 0.04~
0.1 part.
The present invention is using methyl methacrylate, powdered rice hulls and initiator as raw material, and after mixing, polymerization reaction, preparation occurs
The modified powdered rice hulls of polymethyl methacrylate are obtained, monomers methyl methacrylate is distributed in the micropore of powdered rice hulls in mixed process
Interior and powdered rice hulls outer surfaces obtain polymethyl methacrylate, polymethyl methacrylate cladding then by polymerization reaction
In the surfaces externally and internally of powdered rice hulls, i.e., powdered rice hulls are wrapped in inside, modified powdered rice hulls water imbibition reduces, matches with other components
Closing the powdered rice hulls wood plastic composite that is prepared has excellent waterproofness, simultaneously because polymethyl methacrylate with it is highly dense
The compatibility for spending polyethylene is preferable, is conducive to the uniformity that powdered rice hulls are mixed with high density polyethylene (HDPE);In addition, glass fibre adds
Enter to effectively increase the mechanical property of waterproof wood plastic composite.The experimental results showed that waterproof powdered rice hulls wood provided by the invention
The water absorption rate of plastic composite materials is 0.6~1.0%, and tensile strength is 33~36, and impact strength is 8.5~9.2KJ/m2。
Specific embodiment
The present invention provides a kind of waterproof powdered rice hulls wood plastic composite, the raw material including following parts by weight:
After the modified powdered rice hulls of the polymethyl methacrylate are by the raw material mixing of following parts by weight, polymerization reaction occurs and obtains
It arrives:
100 parts of powdered rice hulls, 50~120 parts of methyl methacrylate, 0.04~0.1 part of initiator.
In the present invention, in parts by weight, the raw material of the waterproof powdered rice hulls wood plastic composite includes that high density is poly-
100 parts of ethylene.The present invention is not particularly limited the molecular weight of the high density polyethylene (HDPE), is using conventional commercial product
It can.
In the present invention, on the basis of the parts by weight of high density polyethylene (HDPE), the waterproof powdered rice hulls wood plastic composite
Raw material includes modified 10~90 parts of the powdered rice hulls of polymethyl methacrylate, preferably 30~60 parts, more preferably 40~50 parts.
In the present invention, after the modified powdered rice hulls of the polymethyl methacrylate are by the raw material mixing of following parts by weight, hair
Raw polymerization reaction obtains: 100 parts of powdered rice hulls, 50~120 parts of methyl methacrylate, 0.04~0.1 part of initiator.
In the present invention, in parts by weight, the raw material of the modified powdered rice hulls of the polymethyl methacrylate includes rice husk
100 parts of powder;The partial size of the powdered rice hulls is preferably 60~80 mesh, more preferably 65~70 mesh.
In the present invention, on the basis of the parts by weight of powdered rice hulls, the original of the modified powdered rice hulls of the polymethyl methacrylate
Material includes 50~120 parts of methyl methacrylate, preferably 70~100 parts, more preferably 80~90 parts.
In the present invention, on the basis of the parts by weight of powdered rice hulls, the original of the modified powdered rice hulls of the polymethyl methacrylate
Material includes 0.04~0.1 part of initiator;The initiator is preferably azodiisobutyronitrile, potassium peroxydisulfate or benzoyl peroxide.
In the present invention, the method for modifying of the modified powdered rice hulls of the polymethyl methacrylate preferably includes following steps:
Powdered rice hulls, methyl methacrylate and initiator are mixed, mixed liquor is obtained;
The mixed liquor is subjected to Microwave Emulsifier-Free Polymerization, obtains the modified powdered rice hulls of polymethyl methacrylate.
In the present invention, powdered rice hulls have the characteristics that porous, and powdered rice hulls, initiator and methyl methacrylate are mixed
Afterwards, methyl methacrylate monomer is uniformly distributed in the hole inner and outer surfaces of powdered rice hulls, and then by Microwave Emulsifier-Free Polymerization, what is obtained is poly-
Methyl methacrylate is coated on the surfaces externally and internally of powdered rice hulls, i.e., powdered rice hulls is wrapped in inside, modified powdered rice hulls water suction
Property reduce.
In the present invention, the mixing is preferably stirred;The present invention the revolving speed not being stirred and time
There is particular determination, uniformly mixed mixed liquor can be obtained.
In the present invention, the frequency of the Microwave Emulsifier-Free Polymerization is preferably 10~300GHz, more preferably 100~200GHz;Institute
The temperature for stating Microwave Emulsifier-Free Polymerization is preferably 70~80 DEG C;The time of the Microwave Emulsifier-Free Polymerization is preferably 10~20min, more preferably 10~
12min。
In the present invention, on the basis of the parts by weight of high density polyethylene (HDPE), the waterproof powdered rice hulls wood plastic composite
Raw material includes 10~25 parts of glass fibre, preferably 10~15 parts;The glass fibre is preferably long glass fibres;The long glass
The length of glass fiber is preferably 5~10mm.In the present invention, the glass fibre has in waterproof powdered rice hulls wood plastic composite
There is certain effect of tangling, powdered rice hulls can be stablized, is conducive to make up lacking for the short and small bring composite material strength difference of powdered rice hulls
It falls into, to improve the mechanical property of waterproof powdered rice hulls wood plastic composite.
In the present invention, on the basis of the parts by weight of high density polyethylene (HDPE), the waterproof powdered rice hulls wood plastic composite
Raw material includes 2~7 parts of silane coupling agent, preferably 2~7 parts;The silane coupling agent be preferably vinyltriethoxysilane,
γ-propyl methacrylate base trimethoxy silane or γ-(2,3- glycidyl) propyl trimethoxy silicane, more preferably second
Alkenyl triethoxysilane.In the present invention, the silane coupling agent is conducive to improve glass fibre and high-density polyethylene alkenyl
The compatibility of body, to further increase the mechanical strength of waterproof powdered rice hulls wood plastic composite.
In the present invention, on the basis of the parts by weight of high density polyethylene (HDPE), the waterproof powdered rice hulls wood plastic composite
Raw material includes 5~15 parts of polyethylene wax, preferably 6~12 parts.In the present invention, the polyethylene wax plays intermolecular lubrication
Effect, is conducive in mixed process, keeps material mixing more uniform.
In the present invention, on the basis of the parts by weight of high density polyethylene (HDPE), the waterproof powdered rice hulls wood plastic composite
Raw material includes 3~10 parts of stearic acid, preferably 5~7 parts.In the present invention, the stearic acid is conducive to as exterior lubricant
Improve the processing performance of waterproof powdered rice hulls wood plastic composite.
The present invention also provides a kind of preparation method of waterproof powdered rice hulls wood plastic composite described in above-mentioned technical proposal,
Include the following steps:
By high density polyethylene (HDPE), polymethyl methacrylate modified powdered rice hulls, glass fibre, silane coupling agent, polyethylene
After wax and stearic acid mixing, it is warming up to 120~160 DEG C of 8~15min of mixing and is pressed and molded after deaeration, obtain waterproof
Powdered rice hulls wood plastic composite.
The present invention is not particularly limited the mode of the deaeration, using conventional deaeration mode, such as vacuumizes.
In the present invention, the pressure of the compression molding is preferably 15~20MPa, and the press mold time of the compression molding is excellent
It is selected as 10~15min.
A kind of waterproof powdered rice hulls wood plastic composite provided by the invention is described in detail below with reference to embodiment,
But they cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
100g powdered rice hulls (60 mesh), 50g methyl methacrylate and 0.05g azodiisobutyronitrile are stirred, obtained
Uniform mixed liquor;The mixed liquor is subjected to Microwave Emulsifier-Free Polymerization, the frequency of Microwave Emulsifier-Free Polymerization is 100GHz, and temperature is 70 DEG C,
Time is 15min, obtains the modified powdered rice hulls of polymethyl methacrylate;
The modified powdered rice hulls of polymethyl methacrylate described in 100g high density polyethylene (HDPE), 10g, 15g glass fibre is (long
10mm), after 5g vinyltriethoxysilane, 5g polyethylene wax and the mixing of 5g stearic acid, 120 DEG C of mixing 8min is warming up to, are passed through
After deaeration, mold is imported, 10min is molded with the pressure of 20MPa, obtains waterproof powdered rice hulls wood plastic composite.
Embodiment 2
100g powdered rice hulls (80 mesh), 80g methyl methacrylate and 0.1g azodiisobutyronitrile are stirred, obtained
Even mixed liquor;The mixed liquor is subjected to Microwave Emulsifier-Free Polymerization, the frequency of Microwave Emulsifier-Free Polymerization is 200GHz, and temperature is 75 DEG C, when
Between be 15min, obtain the modified powdered rice hulls of polymethyl methacrylate;
The modified powdered rice hulls of polymethyl methacrylate described in 100g high density polyethylene (HDPE), 30g, 25g glass fibre is (long
10mm), after 8g γ-propyl methacrylate base trimethoxy silane, 15g polyethylene wax and the mixing of 3g stearic acid, 150 are warming up to
DEG C it is kneaded 8min, after deaeration, imports mold, 20min is molded with the pressure of 16MPa, obtains waterproof powdered rice hulls wood and plastic composite
Material.
Embodiment 3
100g powdered rice hulls (60 mesh), 120g methyl methacrylate and 0.08g benzoyl peroxide are stirred, obtained
Uniform mixed liquor;The mixed liquor is subjected to Microwave Emulsifier-Free Polymerization, the frequency of Microwave Emulsifier-Free Polymerization is 300GHz, and temperature is 70 DEG C,
Time is 10min, obtains the modified powdered rice hulls of polymethyl methacrylate;
The modified powdered rice hulls of polymethyl methacrylate described in 100g high density polyethylene (HDPE), 60g, 20g glass fibre is (long
10mm), after 2g vinyltriethoxysilane, 10g polyethylene wax and the mixing of 10g stearic acid, 140 DEG C of mixing 8min are warming up to,
After deaeration, mold is imported, 10min is molded with the pressure of 20MPa, obtains waterproof powdered rice hulls wood plastic composite.
Embodiment 4
100g powdered rice hulls (60 mesh), 100g methyl methacrylate and 0.05g benzoyl peroxide are stirred, obtained
Uniform mixed liquor;The mixed liquor is subjected to Microwave Emulsifier-Free Polymerization, the frequency of Microwave Emulsifier-Free Polymerization is 120GHz, and temperature is 70 DEG C,
Time is 15min, obtains the modified powdered rice hulls of polymethyl methacrylate;
The modified powdered rice hulls of polymethyl methacrylate described in 100g high density polyethylene (HDPE), 90g, 20g glass fibre is (long
10mm), after 10g vinyltriethoxysilane, 5g polyethylene wax and the mixing of 3g stearic acid, 140 DEG C of mixing 10min are warming up to,
After deaeration, mold is imported, 10min is molded with the pressure of 20MPa, obtains waterproof powdered rice hulls wood plastic composite.
Comparative example 1
By 100g high density polyethylene (HDPE), 10g powdered rice hulls (60 mesh), 15g glass fibre (long 10mm), 5g polyethylene wax and 5g
After stearic acid mixing, 120 DEG C of mixing 8min are warming up to, after deaeration, import mold, 10min is molded with the pressure of 20MPa, is obtained
To powdered rice hulls wood plastic composite.
Comparative example 2
100g powdered rice hulls (60 mesh), 50g methyl methacrylate and 0.05g initiator are stirred, obtained uniform
Mixed liquor;The mixed liquor is subjected to Microwave Emulsifier-Free Polymerization, the frequency of Microwave Emulsifier-Free Polymerization is 100GHz, and temperature is 70 DEG C, and the time is
15min obtains the modified powdered rice hulls of polymethyl methacrylate;
The modified powdered rice hulls of polymethyl methacrylate described in 100g high density polyethylene (HDPE), 10g, 5g polyethylene wax and 5g is hard
After resin acid mixing, 120 DEG C of mixing 8min are warming up to, after deaeration, import mold, 10min is molded with the pressure of 20MPa, is obtained
Powdered rice hulls wood plastic composite.
According to 1~2 gained wood plastic composite of method testing example 1~4 disclosed in GB/T1040-92 and comparative example
Tensile property;According to 1~2 gained wood plastic composite of method testing example 1~4 disclosed in GB/T1043-93 and comparative example
Impact strength;The water absorption rate of 1~2 gained wood plastic composite of testing example 1~4 and comparative example as follows:
Wood plastic composite is placed in water, after impregnating for 24 hours, the weight of front and back wood plastic composite is impregnated in test, then calculates water suction
Rate.Test result is as shown in table 1:
The performance test results of 1~2 gained wood plastic composite of 1 Examples 1 to 4 of table and comparative example
As shown in Table 1, the water absorption rate of waterproof powdered rice hulls wood plastic composite obtained by Examples 1 to 4 1.1% hereinafter,
And excellent in mechanical performance;The water absorption rate of 1~2 gained wood plastic composite of comparative example is respectively 2% and 1.2%, and mechanical property
It is poor.Comparative example 1 and the difference of comparative example 2 are modified powdered rice hulls in comparative example 2, and 2 gained wood moulding of comparative example
The water absorption rate of composite material is significantly lower than comparative example 1;And the difference of comparative example 2 and 1 gained wood plastic composite of embodiment
It is that comparative example 2 does not add silane coupling agent and glass fibre, by test result it is found that the mechanical property of embodiment 1 is better than
Comparative example 2, and water absorption rate is less than comparative example 2, illustrates that the addition of silane coupling agent and glass fibre also reduces to a certain extent
The water imbibition of wood plastic composite.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of waterproof powdered rice hulls wood plastic composite, the raw material including following parts by weight:
After the modified powdered rice hulls of the polymethyl methacrylate is by the raw material mixing of following parts by weight, polymerization reaction occurs and obtains:
100 parts of powdered rice hulls, 50~120 parts of methyl methacrylate, 0.04~0.1 part of initiator.
2. waterproof powdered rice hulls wood plastic composite according to claim 1, which is characterized in that the original including following parts by weight
Material:
3. waterproof powdered rice hulls wood plastic composite according to claim 1 or 2, which is characterized in that the glass fibre is
Long glass fibres;The length of the long glass fibres is 5~10mm.
4. waterproof powdered rice hulls wood plastic composite according to claim 1 or 2, which is characterized in that the silane coupling agent
For vinyltriethoxysilane, γ-propyl methacrylate base trimethoxy silane or γ-(2,3- glycidyl) propyl three
Methoxy silane.
5. waterproof powdered rice hulls wood plastic composite according to claim 1 or 2, which is characterized in that the grain of the powdered rice hulls
Diameter is 60~80 mesh.
6. waterproof powdered rice hulls wood plastic composite according to claim 1 or 2, which is characterized in that the polymethyl
The method of modifying of the modified powdered rice hulls of sour methyl esters includes the following steps:
Powdered rice hulls, initiator and methyl methacrylate are mixed, mixed liquor is obtained;
The mixed liquor is subjected to Microwave Emulsifier-Free Polymerization, obtains the modified powdered rice hulls of polymethyl methacrylate.
7. waterproof powdered rice hulls wood plastic composite according to claim 6, which is characterized in that the initiator is azo two
Isobutyronitrile, potassium peroxydisulfate or benzoyl peroxide.
8. waterproof powdered rice hulls wood plastic composite according to claim 6, which is characterized in that the frequency of the Microwave Emulsifier-Free Polymerization
For 10~300GHz, the temperature of the Microwave Emulsifier-Free Polymerization is 70~80 DEG C;The time of the Microwave Emulsifier-Free Polymerization is 10~20min.
9. a kind of preparation method of waterproof powdered rice hulls wood plastic composite according to any one of claims 1 to 8, including walk as follows
It is rapid:
By high density polyethylene (HDPE), the modified powdered rice hulls of polymethyl methacrylate, glass fibre, silane coupling agent, polyethylene wax and
After stearic acid mixing, 120~160 DEG C are warming up to, after deaeration, is pressed and molded, waterproof powdered rice hulls wood and plastic composite is obtained
Material.
10. preparation method according to claim 9, which is characterized in that the pressure of the compression molding is 15~20MPa,
The dwell time of the compression molding is 10~15min.
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