CN108276614A - A kind of preparation method of modified fibre base Wood plastic composite - Google Patents
A kind of preparation method of modified fibre base Wood plastic composite Download PDFInfo
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- CN108276614A CN108276614A CN201810176580.8A CN201810176580A CN108276614A CN 108276614 A CN108276614 A CN 108276614A CN 201810176580 A CN201810176580 A CN 201810176580A CN 108276614 A CN108276614 A CN 108276614A
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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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- 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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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
- C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
- C08L5/14—Hemicellulose; Derivatives thereof
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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
- C08L97/00—Compositions of lignin-containing materials
- C08L97/005—Lignin
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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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses a kind of preparation methods of modified fibre base Wood plastic composite, belong to Wood plastic composite preparing technical field.First pine powder and rice straw are mixed to blend to obtain and blends powder,Utilize acetic anhydride,Acetic acid is dual modified to blending powder progress,Raising blends the fiber in powder and the compatibility between non-polar substrate,Nonpolar silicon tetrafluoride gas is passed through in powder to blending again,The addition self-control glucose reducing solution into above-mentioned modified fibre,The metal salt in modified fibre is reduced into metal simple-substance under the action of making glucose reducing solution by oneself,Continue through sodium pyrophosphate,Lauryl sodium sulfate,Ethoxylated dodecyl alcohol and deionized water are mixed to get self-control dispersion liquid,Quartz sand powder is modified using self-control dispersion liquid,Improve the interface binding power of polarity quartz sand powder and non-polar substrate,Dispersibility of the reinforcing filler in polypropylene,Further increase the mechanical strength of Wood plastic composite,It is with a wide range of applications.
Description
Technical field
The invention discloses a kind of preparation methods of modified fibre base Wood plastic composite, belong to Wood plastic composite preparation
Technical field.
Background technology
The appearance of Wood plastic composite, overcomes because strength of wood is low, variability the advantages of can playing each component in material
Big and organic material elasticity modulus it is low it is equal caused by use limitation, and discarded timber and plastics can be made full use of, reduction ring
It pollutes in border.From the point of view of raw materials for production, the surplus of various waste plastic, waste wood and crops can be used in the raw material of Wood plastic composite
Excess.Therefore the development and extensive use of Wood plastic composite, contributes to the pollution for slowing down plastic refuse, it helps reduces
Agricultural wastes burn the pollution brought to environment.The production and use of Wood plastic composite will not distribute danger to ambient enviroment
The volatile matter of evil human health, material itself goes back recoverable, is a kind of completely new green product and a kind of ecology
Clean composite material.
Wood plastic composite be using plant fiber powders such as plastics, wood powders as primary raw material, along with other auxiliary agents it is extruded,
A kind of advanced composite material (ACM) of the technological formings such as molding, injection, it have be not cracked, be indeformable, is corrosion-resistant, plasticity is strong, energy
Particularly simple realize that personalized moulding, high-environmental, pollution-free, nuisanceless, product are free of the substances such as benzene, formaldehyde, are recycled
It utilizes, is a kind of completely new green product and a kind of composite material that ecology is clean, was just causing in recent years more next
More concerns.Wood plastic composite can be used as the packaging materials such as pallet, packing case, the storage material such as bed board, paving beam, house,
The finishings such as floor, building template, ornament materials, the leisure material such as outdoor tables and chairs, stool that the occasions such as park, court, street use
Material, 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.In the wooden actual production process of modeling,
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, the case where plastics are layered, are layered between plant fiber difference size with plant fiber is will produce, causes 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.At present one of primary raw material of common Wood plastic composite plant fiber mainly by
Cellulose, hemicellulose and lignin composition, wherein containing a large amount of alcoholic extract hydroxyl group, oxygen and phenolic hydroxyl group isopolarity group, and prepare
The surface of another primary raw material thermoplastic polyolefin of Wood plastic composite is nonpolar, therefore the polarity spectrum of the two is very big,
And hydroxyl can form intermolecular hydrogen bond and mutually be intertwined in plant fiber, prevent it from being homogeneously dispersed in thermoplasticity
It is poor so as to cause the interface compatibility between fiber and plastics in polyolefin, in addition its that there are mechanical strengths is relatively low, to affect
Its using effect shortens its service life and defines its use scope.Therefore, it is multiple to invent a kind of modified fibre base modeling wood
Condensation material has positive effect to Wood plastic composite preparing technical field.
Invention content
The technical problems to be solved by the invention：One of primary raw material for current common Wood plastic composite plant is fine
Dimension is mainly made of cellulose, hemicellulose and lignin, wherein containing a large amount of alcoholic extract hydroxyl group, oxygen and phenolic hydroxyl group isopolarity base
Group, and the surface for preparing another primary raw material thermoplastic polyolefin of Wood plastic composite is nonpolar, therefore the polarity of the two
It differs greatly, and hydroxyl can form intermolecular hydrogen bond and mutually be intertwined in plant fiber, prevent it from equably dividing
Dissipate in thermoplastic polyolefin, it is poor so as to cause the interface compatibility between fiber and plastics, in addition its that there are mechanical strengths is relatively low,
To affecting its using effect, shortening its service life and defining the defect of its use scope, provides one kind and change
The preparation method of property fiber base Wood plastic composite.
In order to solve the above technical problems, the present invention is using technical solution as described below：
A kind of preparation method of modified fibre base Wood plastic composite, it is characterised in that specifically preparation process is：
（1）Pine powder and rice straw are mixed and blended, obtains blending powder, then powder quality is blended to blending to be added in powder
8% acetic anhydride, and reaction is mixed, reactant is obtained, continues to mix reactant and acetic acid solution and impregnate, impregnate postposition
It is dry in baking oven, obtain pre- modified fibre；
（2）DEXTROSE ANHYDROUS and deionized water are mixed to be placed in beaker, dissolving is mixed, obtain glucose solution, then to Portugal
The polyethylene glycol of the absolute ethyl alcohol and glucose solution quality 2% of glucose solution quality 3% is added in grape sugar juice, continues to mix
Stirring and dissolving is closed, self-control glucose reducing solution is obtained；
（3）Pre- modified fibre and ferric chloride solution are mixed and are placed in reaction kettle, and is passed through ocratation, continues to be stirred to react,
Modified fibre is obtained, modified fibre and glucose reducing solution are mixed to be placed in beaker and stirred, is put into baking oven and does after stirring
Dry, grinding discharging obtains dried powder；
（4）Weigh 24~30g quartzite sand grinds smash it through 100 mesh sieve, collect sieving quartz sand powder, then by sodium pyrophosphate,
Lauryl sodium sulfate, ethoxylated dodecyl alcohol and deionized water are mixed, and self-control dispersion liquid are obtained, by the quartz sand that is sieved
Powder, self-control dispersion liquid and rosin, which mix, is placed in ultrasonic disperse in ultrasonic wave separating apparatus, still aging after ultrasonic disperse,
It centrifuges, removes liquid phase, it is Modified Quartz Sand powder to obtain sediment；
（5）It counts in parts by weight, weighs 32~36 parts of dried powders, 10~12 parts of Modified Quartz Sand powder, 4~6 portions of horses respectively
Maleic anhydride grafted polypropylene and 16~20 parts of polypropylene mixing are placed in blender and stir, and obtain mixture, mixture is poured into
Extrusion forming in extruder, cooling discharging is to get modified fibre base Wood plastic composite.
Step（1）The mass ratio of the pine powder and rice straw is 2：1, it is 10~12min to blend the time, is stirred to react
Time is 16~20min, and the mass ratio for the acetic acid solution that reactant and mass fraction are 10% is 1：5, soaking time be 3~
5h, drying temperature are 65~75 DEG C, and drying time is 16~20min.
Step（2）The mass ratio of the DEXTROSE ANHYDROUS and deionized water is 1：5, the stirring and dissolving time be 10~
12min, continuation stirring and dissolving time are 32~36min.
Step（3）The mass ratio for the ferric chloride solution that the pre- modified fibre and mass fraction are 15% is 5：3, stirring
Reaction time is 1~2h, and the mass ratio of modified fibre and glucose reducing solution is 4：1, whipping temp is 24~32 DEG C, stirring
Time is 16~20min, and drying temperature is 75~85 DEG C, and drying time is 10~12min.
Step（4）The time that grinds is 6~8min, sodium pyrophosphate, lauryl sodium sulfate, laruyl alcohol polyoxy
Vinethene and the mass ratio of deionized water are 1：3：4：5, the mixing time is 6~8min, sieving quartz sand powder, self-control point
The mass ratio of dispersion liquid and rosin is 5：1：2, ultrasonic disperse frequency is 24~32kHz, and the ultrasonic disperse time is 20~30min, quiet
It is 2~4 days to set digestion time.
Step（5）The speed of agitator is 160~200r/min, and mixing time is 16~20min, squeezes temperature and is
160~180 DEG C, squeeze pressure is 3~5MPa.
Compared with other methods, advantageous effects are the present invention：
（1）For the present invention using polypropylene as base material, dried powder and Modified Quartz Sand powder are aided with maleic anhydride as accelerating agent
Modified fibre base Wood plastic composite is prepared in graft polypropylene etc., mixes pine powder and rice straw blend first
Comminuted powder carries out dual modified, makes the cellulose on its surface, hemicellulose molecule using acetic anhydride, acetic acid to blending powder
With the carboxyl in acetic anhydride and acetic acid esterification occurs for part of hydroxyl, because highly polar hydroxyl is replaced by the ester group of low pole,
Part is destroyed in conjunction with hydrogen bond, to reduce the polarity for blending the fiber surface in powder so that blend the fiber in powder
It may be uniformly dispersed in inside base material, also blend the fiber in powder and the compatibility between non-polar substrate with regard to improving, then to
It blends and is passed through nonpolar silicon tetrafluoride gas in powder, so that it is in non-pole to blend the fiber in powder under the conditions of certain temperature
Property, it improves blend the fiber in powder and the compatibility between non-polar substrate again；
（2）Then pre- modified fiber and ferric chloride solution are mixed by the present invention, and chelatropic reaction occurs, and are modified
Fiber, then dissolving is mixed in DEXTROSE ANHYDROUS, absolute ethyl alcohol and polyethylene glycol and obtains self-control glucose reducing solution, upwards
Addition self-control glucose reducing solution in modified fibre is stated, it will be in modified fibre under the action of making glucose reducing solution by oneself
Metal salt is reduced into metal simple-substance, is effectively filled in base material internal void, is conducive to the mechanical strength of Wood plastic composite
It is improved, continues through sodium pyrophosphate, lauryl sodium sulfate, ethoxylated dodecyl alcohol and deionized water and be mixed to get certainly
Dispersion liquid processed is modified quartz sand powder using self-control dispersion liquid, makes quartz sand powder uniform adsorption in substrate surface,
Middle quartz sand is rich in silica, and after latex coagulation, self-control dispersion liquid and the rosin of substrate surface absorption play increase-volume jointly
Effect improves the interface binding power of polarity quartz sand powder and non-polar substrate, improve quartz sand powder dispersibility and
Physical crosslinking acts on, and forms tough and tensile network structure, in addition the addition of maleic anhydride inoculated polypropylene, significantly improves and fill out
The compatibility of material and non-polar substrate, effectively dispersibility of the reinforcing filler in polypropylene, further increases wood-plastic composite
The mechanical strength of material, is with a wide range of applications.
Specific implementation mode
It is 2 in mass ratio：Pine powder and rice straw are mixed and blend 10~12min by 1, obtain blending powder, then to blending powder
It is middle that the acetic anhydride for blending powder quality 8% is added, and 16~20min of reaction is mixed, reactant is obtained, is continued reactant
The acetic acid solution for being 10% with mass fraction is 1 in mass ratio：3~5h is impregnated in 5 mixing, and immersion is placed in baking oven, in temperature
It is dry 16~20min at 65~75 DEG C, obtains pre- modified fibre；It is 1 in mass ratio：5 by DEXTROSE ANHYDROUS and deionized water
Mixing, which is placed in beaker, is mixed 10~12min of dissolving, obtains glucose solution, then glucose is added into glucose solution
The polyethylene glycol of the absolute ethyl alcohol and glucose solution quality 2% of solution quality 3% continues that 32~36min of dissolving is mixed,
Obtain self-control glucose reducing solution；It is 5 in mass ratio by the ferric chloride solution that pre- modified fibre and mass fraction are 15%：3
Mixing is placed in reaction kettle, and is passed through ocratation, is continued to be stirred to react 1~2h, is obtained modified fibre, is in mass ratio 4：1
Modified fibre and glucose reducing solution are mixed and are placed in beaker, 16~20min, stirring are stirred at being 24~32 DEG C in temperature
After be put into baking oven, dry 10~12min at being 75~85 DEG C in temperature, grinding discharging obtains dried powder；Weigh 24~
30g quartzite sand grinds sieve with 100 mesh sieve after crushing 6~8min, collect sieving quartz sand powder, then by sodium pyrophosphate, dodecyl
Sodium sulphate, ethoxylated dodecyl alcohol and deionized water are 1 in mass ratio：3：4：5 are mixed 6~8min, obtain self-control point
Sieving quartz sand powder, self-control dispersion liquid and rosin are 5 in mass ratio by dispersion liquid：1：2 mixing are placed in ultrasonic wave separating apparatus,
20~30min of ultrasonic disperse under conditions of frequency is 24~32kHz, after ultrasonic disperse, still aging 2~4 days, centrifugation
Separation removes liquid phase, and it is Modified Quartz Sand powder to obtain sediment；It counts in parts by weight, weighs 32~36 parts of dryings respectively
Powder, 10~12 parts of Modified Quartz Sand powder, 4~6 parts of maleic anhydride inoculated polypropylenes and 16~20 parts of polypropylene mixing are placed in
In blender, 16~20min is stirred under conditions of rotating speed is 160~200r/min, mixture is obtained, mixture is poured into crowded
In press, extrusion forming under conditions of temperature is 160~180 DEG C, pressure is 3~5MPa, cooling discharging is to get modified fibre
Base Wood plastic composite.
Example 1
It is 2 in mass ratio：Pine powder and rice straw mixing are blended 10min by 1, obtain blending powder, then to blending in powder add
Enter to blend the acetic anhydride of powder quality 8%, and reaction 16min is mixed, obtain reactant, continues reactant and quality point
Number is 1 in mass ratio for 10% acetic acid solution：3h is impregnated in 5 mixing, and immersion is placed in baking oven, dry at being 65 DEG C in temperature
16min obtains pre- modified fibre；It is 1 in mass ratio：DEXTROSE ANHYDROUS and deionized water mixing are placed in mixing in beaker by 5 to be stirred
Mix dissolving 10min, obtain glucose solution, then be added into glucose solution glucose solution quality 3% absolute ethyl alcohol and
The polyethylene glycol of glucose solution quality 2% continues that dissolving 32min is mixed, obtains self-control glucose reducing solution；It will be pre-
The ferric chloride solution that modified fibre and mass fraction are 15% is 5 in mass ratio：3 mixing are placed in reaction kettle, and are passed through tetrafluoro
SiClx continues to be stirred to react 1h, obtains modified fibre, is in mass ratio 4：1 mixes modified fibre and glucose reducing solution
It is placed in beaker, stirs 16min at being 24 DEG C in temperature, be put into baking oven after stirring, dry 10min at being 75 DEG C in temperature,
Grinding discharging, obtains dried powder；It weighs after 24g quartzite sand grinds crush 6min and sieves with 100 mesh sieve, collect sieving quartz sand powder
End, then by sodium pyrophosphate, lauryl sodium sulfate, ethoxylated dodecyl alcohol and deionized water in mass ratio be 1：3：4：5 is mixed
Stirring 6min is closed, self-control dispersion liquid is obtained, is 5 in mass ratio by sieving quartz sand powder, self-control dispersion liquid and rosin：1：2 is mixed
Conjunction is placed in ultrasonic wave separating apparatus, ultrasonic disperse 20min under conditions of frequency is 24kHz, after ultrasonic disperse, is stood old
Change 2 days, centrifuge, removes liquid phase, it is Modified Quartz Sand powder to obtain sediment；It counts in parts by weight, weighs 32 respectively
Part dried powder, 10 parts of Modified Quartz Sand powder, 4 parts of maleic anhydride inoculated polypropylenes and 16 parts of polypropylene mixing are placed in blender
In, 16min is stirred under conditions of rotating speed is 160r/min, mixture is obtained, mixture is poured into extruder, be in temperature
160 DEG C, pressure be 3MPa under conditions of extrusion forming, cooling discharging is to get modified fibre base Wood plastic composite.
Example 2
It is 2 in mass ratio：Pine powder and rice straw mixing are blended 11min by 1, obtain blending powder, then to blending in powder add
Enter to blend the acetic anhydride of powder quality 8%, and reaction 18min is mixed, obtain reactant, continues reactant and quality point
Number is 1 in mass ratio for 10% acetic acid solution：4h is impregnated in 5 mixing, and immersion is placed in baking oven, dry at being 70 DEG C in temperature
18min obtains pre- modified fibre；It is 1 in mass ratio：DEXTROSE ANHYDROUS and deionized water mixing are placed in mixing in beaker by 5 to be stirred
Mix dissolving 11min, obtain glucose solution, then be added into glucose solution glucose solution quality 3% absolute ethyl alcohol and
The polyethylene glycol of glucose solution quality 2% continues that dissolving 34min is mixed, obtains self-control glucose reducing solution；It will be pre-
The ferric chloride solution that modified fibre and mass fraction are 15% is 5 in mass ratio：3 mixing are placed in reaction kettle, and are passed through tetrafluoro
SiClx continues to be stirred to react 1.5h, obtains modified fibre, is in mass ratio 4：1 mixes modified fibre and glucose reducing solution
Conjunction is placed in beaker, is stirred 18min at being 28 DEG C in temperature, is put into baking oven after stirring, dry at being 80 DEG C in temperature
11min, grinding discharging, obtains dried powder；It weighs after 28g quartzite sand grinds crush 7min and sieves with 100 mesh sieve, collect sieving quartz
Emery dust end, then by sodium pyrophosphate, lauryl sodium sulfate, ethoxylated dodecyl alcohol and deionized water in mass ratio be 1：3：4：
5 are mixed 7min, obtain self-control dispersion liquid, are 5 in mass ratio by sieving quartz sand powder, self-control dispersion liquid and rosin：1：2
Mixing is placed in ultrasonic wave separating apparatus, ultrasonic disperse 25min under conditions of frequency is 28kHz, after ultrasonic disperse, is stood
Ageing 3 days centrifuges, and removes liquid phase, it is Modified Quartz Sand powder to obtain sediment；It counts, weighs respectively in parts by weight
34 parts of dried powders, 11 parts of Modified Quartz Sand powder, 5 parts of maleic anhydride inoculated polypropylenes and 18 parts of polypropylene mixing are placed in stirring
In machine, 18min is stirred under conditions of rotating speed is 180r/min, mixture is obtained, mixture is poured into extruder, in temperature
Extrusion forming under conditions of being 4MPa for 170 DEG C, pressure, cooling discharging is to get modified fibre base Wood plastic composite.
Example 3
It is 2 in mass ratio：Pine powder and rice straw mixing are blended 12min by 1, obtain blending powder, then to blending in powder add
Enter to blend the acetic anhydride of powder quality 8%, and reaction 20min is mixed, obtain reactant, continues reactant and quality point
Number is 1 in mass ratio for 10% acetic acid solution：5h is impregnated in 5 mixing, and immersion is placed in baking oven, dry at being 75 DEG C in temperature
20min obtains pre- modified fibre；It is 1 in mass ratio：DEXTROSE ANHYDROUS and deionized water mixing are placed in mixing in beaker by 5 to be stirred
Mix dissolving 12min, obtain glucose solution, then be added into glucose solution glucose solution quality 3% absolute ethyl alcohol and
The polyethylene glycol of glucose solution quality 2% continues that dissolving 36min is mixed, obtains self-control glucose reducing solution；It will be pre-
The ferric chloride solution that modified fibre and mass fraction are 15% is 5 in mass ratio：3 mixing are placed in reaction kettle, and are passed through tetrafluoro
SiClx continues to be stirred to react 2h, obtains modified fibre, is in mass ratio 4：1 mixes modified fibre and glucose reducing solution
It is placed in beaker, stirs 20min at being 32 DEG C in temperature, be put into baking oven after stirring, dry 12min at being 85 DEG C in temperature,
Grinding discharging, obtains dried powder；It weighs after 30g quartzite sand grinds crush 8min and sieves with 100 mesh sieve, collect sieving quartz sand powder
End, then by sodium pyrophosphate, lauryl sodium sulfate, ethoxylated dodecyl alcohol and deionized water in mass ratio be 1：3：4：5 is mixed
Stirring 8min is closed, self-control dispersion liquid is obtained, is 5 in mass ratio by sieving quartz sand powder, self-control dispersion liquid and rosin：1：2 is mixed
Conjunction is placed in ultrasonic wave separating apparatus, ultrasonic disperse 30min under conditions of frequency is 32kHz, after ultrasonic disperse, is stood old
Change 4 days, centrifuge, removes liquid phase, it is Modified Quartz Sand powder to obtain sediment；It counts in parts by weight, weighs 36 respectively
Part dried powder, 12 parts of Modified Quartz Sand powder, 6 parts of maleic anhydride inoculated polypropylenes and 20 parts of polypropylene mixing are placed in blender
In, 20min is stirred under conditions of rotating speed is 200r/min, mixture is obtained, mixture is poured into extruder, be in temperature
180 DEG C, pressure be 5MPa under conditions of extrusion forming, cooling discharging is to get modified fibre base Wood plastic composite.
Comparative example
With the modified fibre base Wood plastic composite of Shandong company production as a comparison case to modified fibre produced by the present invention
Modified fibre base Wood plastic composite in base Wood plastic composite and comparative example carries out performance detection, testing result such as 1 institute of table
Show：
Test method：
Tensile strength test is detected using Wood plastic composite tensile strength test machine；
Cantilever beam impact strength test is detected using radial-boom impact tester；
Static bending strength test is detected by the requirement of People's Republic of China (PRC) forestry industry standard LY/T1613-2004；
Ageing-resistant experiment：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.
1 welding rod performance measurement result of table
| Test event | Example 1 | Example 2 | Example 3 | Comparative example |
| Tensile strength（MPa） | 17.6 | 17.7 | 17.9 | 10.5 |
| Cantilever beam impact strength（kJ/m2） | 7.0 | 7.1 | 7.2 | 4.5 |
| Static bending strength（MPa） | 35.1 | 35.2 | 35.4 | 20.4 |
| At 90 DEG C after thermo-oxidative ageing 3000h, static bending strength conservation rate（%） | 94.1 | 94.5 | 94.8 | 75.8 |
| After ultraviolet light and aging 2000h, static bending strength conservation rate（%） | 94.2 | 94.4 | 94.6 | 71.5 |
According to the modified fibre base Wood plastic composite high mechanical strength produced by the present invention of data among the above, after thermo-oxidative ageing
High with the static bending strength conservation rate after ultraviolet light and aging, ageing-resistant performance is good, and service life is long, has broad application prospects.
Claims (6)
1. a kind of preparation method of modified fibre base Wood plastic composite, it is characterised in that specifically preparation process is：
（1）Pine powder and rice straw are mixed and blended, obtains blending powder, then powder quality is blended to blending to be added in powder
8% acetic anhydride, and reaction is mixed, reactant is obtained, continues to mix reactant and acetic acid solution and impregnate, impregnate postposition
It is dry in baking oven, obtain pre- modified fibre；
（2）DEXTROSE ANHYDROUS and deionized water are mixed to be placed in beaker, dissolving is mixed, obtain glucose solution, then to Portugal
The polyethylene glycol of the absolute ethyl alcohol and glucose solution quality 2% of glucose solution quality 3% is added in grape sugar juice, continues to mix
Stirring and dissolving is closed, self-control glucose reducing solution is obtained；
（3）Pre- modified fibre and ferric chloride solution are mixed and are placed in reaction kettle, and is passed through ocratation, continues to be stirred to react,
Modified fibre is obtained, modified fibre and glucose reducing solution are mixed to be placed in beaker and stirred, is put into baking oven and does after stirring
Dry, grinding discharging obtains dried powder；
（4）Weigh 24~30g quartzite sand grinds smash it through 100 mesh sieve, collect sieving quartz sand powder, then by sodium pyrophosphate,
Lauryl sodium sulfate, ethoxylated dodecyl alcohol and deionized water are mixed, and self-control dispersion liquid are obtained, by the quartz sand that is sieved
Powder, self-control dispersion liquid and rosin, which mix, is placed in ultrasonic disperse in ultrasonic wave separating apparatus, still aging after ultrasonic disperse,
It centrifuges, removes liquid phase, it is Modified Quartz Sand powder to obtain sediment；
（5）It counts in parts by weight, weighs 32~36 parts of dried powders, 10~12 parts of Modified Quartz Sand powder, 4~6 portions of horses respectively
Maleic anhydride grafted polypropylene and 16~20 parts of polypropylene mixing are placed in blender and stir, and obtain mixture, mixture is poured into
Extrusion forming in extruder, cooling discharging is to get modified fibre base Wood plastic composite.
2. a kind of preparation method of modified fibre base Wood plastic composite according to claim 1, it is characterised in that：Step
（1）The mass ratio of the pine powder and rice straw is 2：1, blend the time be 10~12min, be stirred to react the time be 16~
The mass ratio for the acetic acid solution that 20min, reactant and mass fraction are 10% is 1：5, soaking time is 3~5h, drying temperature
It it is 65~75 DEG C, drying time is 16~20min.
3. a kind of preparation method of modified fibre base Wood plastic composite according to claim 1, it is characterised in that：Step
（2）The mass ratio of the DEXTROSE ANHYDROUS and deionized water is 1：5, the stirring and dissolving time is 10~12min, continues to stir molten
The solution time is 32~36min.
4. a kind of preparation method of modified fibre base Wood plastic composite according to claim 1, it is characterised in that：Step
（3）The mass ratio for the ferric chloride solution that the pre- modified fibre and mass fraction are 15% is 5：3, it is 1 to be stirred to react the time
The mass ratio of~2h, modified fibre and glucose reducing solution is 4：1, whipping temp be 24~32 DEG C, mixing time be 16~
20min, drying temperature are 75~85 DEG C, and drying time is 10~12min.
5. a kind of preparation method of modified fibre base Wood plastic composite according to claim 1, it is characterised in that：Step
（4）It is described that grind the time be 6~8min, sodium pyrophosphate, lauryl sodium sulfate, ethoxylated dodecyl alcohol and go from
The mass ratio of sub- water is 1：3：4：5, the mixing time is 6~8min, sieving quartz sand powder, self-control dispersion liquid and rosin
Mass ratio is 5：1：2, ultrasonic disperse frequency is 24~32kHz, and the ultrasonic disperse time is 20~30min, and the still aging time is 2
~4 days.
6. a kind of preparation method of modified fibre base Wood plastic composite according to claim 1, it is characterised in that：Step
（5）The speed of agitator is 160~200r/min, and mixing time is 16~20min, and it is 160~180 DEG C to squeeze temperature, is squeezed
Pressure pressure is 3~5MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810176580.8A CN108276614A (en) | 2018-03-03 | 2018-03-03 | A kind of preparation method of modified fibre base Wood plastic composite |
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| CN201810176580.8A CN108276614A (en) | 2018-03-03 | 2018-03-03 | A kind of preparation method of modified fibre base Wood plastic composite |
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| CN201810176580.8A Pending CN108276614A (en) | 2018-03-03 | 2018-03-03 | A kind of preparation method of modified fibre base Wood plastic composite |
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