CN117210016A - Wood silica gel composite material and production process thereof - Google Patents
Wood silica gel composite material and production process thereof Download PDFInfo
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- CN117210016A CN117210016A CN202311299617.3A CN202311299617A CN117210016A CN 117210016 A CN117210016 A CN 117210016A CN 202311299617 A CN202311299617 A CN 202311299617A CN 117210016 A CN117210016 A CN 117210016A
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- 239000002023 wood Substances 0.000 title claims abstract description 119
- 239000002131 composite material Substances 0.000 title claims abstract description 48
- 239000000741 silica gel Substances 0.000 title claims abstract description 48
- 229910002027 silica gel Inorganic materials 0.000 title claims abstract description 48
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 87
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 59
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 46
- 239000004945 silicone rubber Substances 0.000 claims abstract description 36
- 239000010875 treated wood Substances 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 238000004513 sizing Methods 0.000 claims abstract description 10
- 239000000049 pigment Substances 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000003856 thermoforming Methods 0.000 claims abstract description 6
- 239000000839 emulsion Substances 0.000 claims description 65
- 150000001875 compounds Chemical class 0.000 claims description 25
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 22
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 22
- -1 polydimethylsiloxane copolymer Polymers 0.000 claims description 22
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical class C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims description 19
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 19
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 16
- 239000007787 solid Substances 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 13
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 12
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 12
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 12
- UUORTJUPDJJXST-UHFFFAOYSA-N n-(2-hydroxyethyl)prop-2-enamide Chemical compound OCCNC(=O)C=C UUORTJUPDJJXST-UHFFFAOYSA-N 0.000 claims description 12
- HIHIPCDUFKZOSL-UHFFFAOYSA-N ethenyl(methyl)silicon Chemical compound C[Si]C=C HIHIPCDUFKZOSL-UHFFFAOYSA-N 0.000 claims description 9
- 150000002825 nitriles Chemical class 0.000 claims description 9
- 229920001296 polysiloxane Polymers 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 8
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 claims description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 2
- 235000011613 Pinus brutia Nutrition 0.000 claims description 2
- 241000018646 Pinus brutia Species 0.000 claims description 2
- 241000219000 Populus Species 0.000 claims description 2
- 244000082946 Tarchonanthus camphoratus Species 0.000 claims description 2
- 235000005701 Tarchonanthus camphoratus Nutrition 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 claims 1
- ZGEJDJWVQDARMZ-UHFFFAOYSA-N prop-2-ene-1,1,2,3-tetrol urea Chemical compound NC(=O)N.OC(O)C(=CO)O ZGEJDJWVQDARMZ-UHFFFAOYSA-N 0.000 claims 1
- 230000032683 aging Effects 0.000 abstract description 33
- 230000000052 comparative effect Effects 0.000 description 41
- 229960001866 silicon dioxide Drugs 0.000 description 32
- 238000002360 preparation method Methods 0.000 description 25
- 235000013312 flour Nutrition 0.000 description 16
- 230000008859 change Effects 0.000 description 9
- 229920001971 elastomer Polymers 0.000 description 8
- 239000005060 rubber Substances 0.000 description 8
- 244000043261 Hevea brasiliensis Species 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 229920003052 natural elastomer Polymers 0.000 description 7
- 229920001194 natural rubber Polymers 0.000 description 7
- 229920003023 plastic Polymers 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 238000010074 rubber mixing Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 5
- 238000013329 compounding Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 229920002554 vinyl polymer Polymers 0.000 description 4
- 229920001587 Wood-plastic composite Polymers 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- HDERJYVLTPVNRI-UHFFFAOYSA-N ethene;ethenyl acetate Chemical group C=C.CC(=O)OC=C HDERJYVLTPVNRI-UHFFFAOYSA-N 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229920003051 synthetic elastomer Polymers 0.000 description 3
- 239000005061 synthetic rubber Substances 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- 239000011155 wood-plastic composite Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 125000001731 2-cyanoethyl group Chemical group [H]C([H])(*)C([H])([H])C#N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 229920005560 fluorosilicone rubber Polymers 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Abstract
The application relates to the technical field of decorative materials, in particular to a wood silica gel composite material and a production process thereof. Step 1: treating the wood powder by using a treating agent, and drying to obtain treated wood powder; step 2: mixing silicone rubber, vulcanizing agent and pigment for 10-30min, adding treated wood powder, and mixing uniformly to obtain wood powder sizing material; step 3: and (3) performing thermoforming on the wood powder sizing material to obtain the wood silica gel composite material. The wood powder is treated by the treating agent and then mixed with the silicone rubber, so that the treated wood powder and the silicone rubber are easily fused, and the prepared wood silica gel composite material has better heat resistance, ageing resistance and mechanical property.
Description
Technical Field
The application relates to the technical field of decorative materials, in particular to a wood silica gel composite material and a production process thereof.
Background
The decorative material is used for decorating indoor and outdoor wall surfaces, floors, furniture, household appliances and other shells. In general, in order to make a decorative board have a decorative aesthetic feeling of wood, various board surfaces are coated, printed, and sprayed to make the board surface exhibit a color, a pattern, a grain, a pattern, and the like of wood. But the above production process is complicated.
Therefore, there is a wood plastic material formed by compounding wood powder and plastic, which exhibits a good wood decorative effect, but is hard, easily broken, and has low heat resistance, and the plastic is toxic, and at the same time, has a long degradation time, easily pollutes the environment, and thus has low environmental friendliness.
For this purpose, a wood rubber material is formed by compounding synthetic rubber such as natural rubber and styrene-butadiene rubber with wood powder, and the wood rubber material obtained by compounding natural rubber with wood powder is not easy to break, but has poor heat resistance, easy aging and the like; synthetic rubber is better in ageing and temperature resistance, but the synthesis of the synthetic rubber mainly depends on petrochemical industry, and the production process pollutes the environment. Further investigation into the overall properties of wood composites is therefore required.
Disclosure of Invention
In order to solve the technical problems, the application provides a wood silica gel composite material and a production process thereof.
In a first aspect, the application provides a process for producing a wood-silica gel composite material, comprising the steps of:
step 1: treating the wood powder by using a treating agent, and drying to obtain treated wood powder;
step 2: mixing silicone rubber, vulcanizing agent and pigment for 10-30min, adding treated wood powder, and mixing uniformly to obtain wood powder sizing material;
step 3: and (3) performing thermoforming on the wood powder sizing material to obtain the wood silica gel composite material.
In the preparation process, the operation is simple and the production efficiency is high. And the prepared wood silica gel composite material has better heat resistance, ageing resistance, difficult fracture and the like.
The main component of the wood powder is cellulose and is difficult to be compatible with the silicone rubber, so that the compatibility of the wood powder and the silicone rubber is improved through the treatment agent, and the treated wood powder is added after the silicone rubber, the vulcanizing agent and the pigment are compounded for mixing with the treated wood powder.
And the appearance of the silicone rubber is transparent, and after the silicone rubber is compounded with wood powder, the color of the obtained wood silicone composite material is similar to that of the original wood powder, so that the wood-like decorative effect is better.
In addition, the silicon rubber is a colorless transparent polymer and has the advantages of environmental protection, no toxicity and the like, and when the silicon rubber is mixed with wood powder, the prepared decorative board shows the color of wood more, so that the wood color of the wood silica gel composite material is natural and attractive, and meanwhile, excessive pigment is not required to be added for adjusting the color. Meanwhile, the wood silica gel composite material prepared by the application is 50-150kg/cm 2 The elongation at break is 100-200%.
Because the sizing material of the natural rubber is generally milky yellow, brown and dark, when the natural rubber is mixed with wood powder, the color of the prepared wood silica gel composite material is difficult to control, and the wood color is worse than that of the log.
The wood of the present application means wood containing and exhibiting the color of wood.
Preferably, the ratio of the wood flour to the treating agent is 1: (0.3-0.7).
The above-mentioned amount of the treating agent is mixed with wood powder to form a coating film on the surface of wood powder. The coating film can further improve the compatibility and the bonding stability of wood powder and silicon rubber. Further improves the heat resistance, the ageing resistance and the mechanical property of the wood silica gel composite material.
Preferably, the proportion of the silicone rubber, the vulcanizing agent and the pigment in the step 2 is 1: (0.01-0.05): (0-0.08); the dosage ratio of the silicon rubber to the treated wood powder is 1 (0.05-0.25).
The proportion of the above amount is a better choice of the application, and after the wood flour and the silicon rubber are filled, the effect on the original performance of the silicon rubber is little, and the wood decoration effect is better. When the ratio of the silicon rubber to the treated wood flour is 1:1, the mechanical property of the prepared wood silica gel composite material is obviously reduced, and the phenomenon of easy fracture occurs.
Preferably, the molding temperature in the step 3 is 110-150 ℃ and the molding time is 100-200s.
The range of the molding temperature and the molding time is selected, so that the wood flour sizing material is further crosslinked and cured to form the wood silica gel composite material with stable structure.
Preferably, the particle size of the wood flour is 1-40 μm.
The particle size range is selected, so that the wood powder is easy to be uniformly mixed with the treating agent, and the mechanical property is greatly influenced after the treated wood powder is mixed with the silicone rubber. If the particle size is more than 40 mu m, the surface of the wood silica gel composite material is rough, and the mechanical property is obviously reduced.
Preferably, the wood powder is one or more of oak wood powder, pine wood powder, poplar wood powder, fragrant wood powder and Chinese camphor wood powder.
After one or more components are selected from the wood powder, the wood powder has better compatibility with the treating agent, and meanwhile, the obtained treated wood powder has smaller influence on the physical properties of the silicon rubber after being filled in the silicon rubber.
Various woods can be selected according to the desired wood effect, and the type of wood powder can be selected according to the toughness, strength, and the like.
Preferably, the silicone rubber is one or more of methyl vinyl silicone rubber compound, fluorosilicone compound and nitrile silicone compound.
The silicone rubber is unvulcanized silicone rubber compound, wherein methyl vinyl silicone rubber is formed by copolymerizing dimethyl siloxane and a small amount of vinyl siloxane, the vinyl content is 0.1-0.3%, and the average molecular weight is 10-20 ten thousand. The high-temperature resistance, the low-temperature resistance, the ageing resistance, the tensile strength, the elongation at break and the like are good; the fluorosilicone rubber combines the advantages of the silicone rubber and the fluororubber, has better heat resistance, cold resistance, compression set resistance and the like, has average molecules of 5-10 ten thousand and has fluorine content of 28-33%.
The nitrile silicon rubber compound is unvulcanized nitrile silicon rubber, is a colorless transparent high-viscosity plastic linear high-molecular compound, and has a main chain composed of silicon and oxygen atoms, and side groups connected with the silicon are methyl, vinyl and cyanoethyl. The average molecular weight is 50-100 ten thousand, the vinyl content is 0.13-0.18%, and the beta-cyanoethyl content is 22-25%. Has better heat resistance, aging resistance and mechanical property.
The prepared wood silica gel composite material has better heat resistance, ageing resistance and mechanical property by mixing one or more of the silicon rubbers.
When the methyl vinyl silicone rubber compound, the fluorosilicone compound and the nitrile silicone compound are mixed according to the weight ratio of 1: (0.05-0.5): and (0.1-0.5), the prepared wood silica gel composite material has a synergistic effect, so that the heat resistance, ageing resistance, mechanical properties and the like of the prepared wood silica gel composite material are better.
Preferably, the treating agent consists of the following raw materials in parts by weight:
5-10 parts of VAE emulsion
1-3 parts of hydroxyethyl cellulose
0.3-0.9 part of N-hydroxyethyl acrylamide
1.8 to 3.2 parts of polydimethylsiloxane copolymer emulsion
0.1-0.5 part of modified ethylene-vinyl acetate copolymer emulsion.
Preferably, the treatment agent is obtained by the steps of: 5-10 parts of VAE emulsion, 1-3 parts of hydroxyethyl cellulose, 0.3-0.9 part of N-hydroxyethyl acrylamide, 1.8-3.2 parts of polydimethylsiloxane copolymer emulsion and 0.1-0.5 part of modified ethylene-vinyl acetate copolymer emulsion are weighed and mixed, and the mixture is stirred for 20-30min at the rotating speed of 100r/min to obtain the treating agent.
The VAE emulsion is a milky aqueous solution and is a vinyl acetate-ethylene copolymer emulsion, and has the advantages of environmental protection, good adhesion, heat resistance, good film forming property and the like; the polydimethylsiloxane copolymer emulsion is a water-based silicone-acrylate emulsion, has good film forming property, good adhesion with wood powder, and hydroxyethyl cellulose has the advantages of good film forming property, tackifying property and the like. N-hydroxyethyl acrylamide is an acrylic acid monomer capable of self-polymerizing and further enhancing the adhesion of the treating agent feed system.
The modified ethylene-vinyl acetate copolymer emulsion is a wax emulsion of ethylene-vinyl acetate copolymer, has orientation effect and rheological property, can enable wood powder to form various irregular lines in the wood silica gel composite material, and has good compatibility with VAE emulsion.
According to the application, the VAE emulsion, the hydroxyethyl cellulose, the N-hydroxyethyl acrylamide, the polydimethylsiloxane copolymer emulsion and the modified ethylene-vinyl acetate copolymer emulsion are compounded, so that the obtained treating agent has good film forming property, adhesiveness, heat resistance and the like, and the cured film is easy to be compatible with silicon rubber. The wood powder is easy to form a film on the surface of the wood powder, and after the wood powder is solidified, the obtained treated wood powder is easy to be compatible with the silicon rubber, and after the wood powder is formed at high temperature, the combination property of the wood powder and the silica gel is good, so that the heat resistance, the high and low temperature resistance, the weather resistance and the mechanical property of the wood silica gel composite material are further provided.
Preferably, the VAE emulsion has a solids content of 55-58% and a viscosity of 3500-4500 mPas at 25 ℃; the solid content of the modified ethylene-vinyl acetate copolymer emulsion is 48-52%, and the viscosity of the modified ethylene-vinyl acetate copolymer emulsion is 200-300 mPa.s at 25 ℃; the solid content of the polydimethylsiloxane copolymer emulsion is 38-45%, and the viscosity is 1000-3000mm at 25 DEG C 2 /s。
The obtained treating agent is easy to form a film by selecting the solid content range and the viscosity range, and wood powder treated by the treating agent is also easy to be compatible with silicon rubber, so that the mechanical strength of the wood-silicon composite material is further improved.
The modified ethylene vinyl acetate copolymer emulsion is preferably of the Pick AQUATIX 8421 brand type. The brand model of the polydimethylsiloxane copolymer emulsion is preferably believed to be KP-550. The brand model of the VAE emulsion is preferably Zhengbang540。
In a second aspect, a decorative wood-silica-gel board is produced by the process of any one of claims 1 to 9.
The wood silica gel composite material has better high and low temperature resistance, heat resistance, weather resistance and mechanical property, has normal use temperature of more than 200 ℃, is environment-friendly and nontoxic, can be used for cutting boards, cooking shovels, refrigerator shells, ice grids, floors, flower gardens, trestle ways, wall decorative plates and the like, and can show better wood decorative effects.
Compared with wood-plastic composite materials, the wood-plastic composite material is more environment-friendly and practical, has good aging resistance and temperature resistance compared with wood rubber, and has wider application range.
In summary, the application has the following beneficial effects:
1. the application adopts the treating agent to carry out surface treatment on the wood powder, improves the compatibility of the wood powder and the silicon rubber, and the prepared wood silica gel composite material has better heat resistance, ageing resistance and mechanical property by mixing the silicon rubber with the treated wood powder and then carrying out high-temperature molding.
2. The treatment agent obtained by compounding the VAE emulsion, the hydroxyethyl cellulose, the N-hydroxyethyl acrylamide, the polydimethylsiloxane copolymer emulsion and the modified ethylene-vinyl acetate copolymer emulsion has good film forming property, adhesiveness, heat resistance and the like, and the cured film is easy to be compatible with silicon rubber. The wood powder is easy to form a film on the surface of the wood powder, and after the wood powder is solidified, the obtained treated wood powder is easy to be compatible with the silicon rubber, and after the wood powder is formed at high temperature, the combination property of the wood powder and the silica gel is good, so that the heat resistance, the high and low temperature resistance, the weather resistance and the mechanical property of the wood silica gel composite material are further provided.
3. The methyl vinyl silicone rubber compound, the fluorosilicone compound and the nitrile silicone compound are compounded to play a synergistic role, so that the heat resistance, the ageing resistance, the mechanical properties and the like of the prepared wood silicone composite material are better.
Detailed Description
The present application will be described in further detail with reference to examples.
Preparation example of treating agent
Preparation example 1
A treating agent is obtained by the following method:
10kg of VAE emulsion, 1kg of hydroxyethyl cellulose, 0.3kg of N-hydroxyethyl acrylamide, 1.8kg of polydimethylsiloxane copolymer emulsion and 0.1kg of modified ethylene-vinyl acetate copolymer emulsion are weighed and sequentially put into a stirring barrel, and stirred for 20min at the rotating speed of 100r/min to obtain the treating agent.
The VAE emulsion has a solids content of 55% and a viscosity of 3500 mPas at 25 ℃; the solid content of the modified ethylene-vinyl acetate copolymer emulsion is 48%, and the viscosity of the modified ethylene-vinyl acetate copolymer emulsion is 200 mPa.s at 25 ℃; the solids content of the polydimethylsiloxane copolymer emulsion was 38% and the viscosity at 25℃was 1000mm 2 /s。
Preparation example 2
A treating agent is obtained by the following method:
7kg of VAE emulsion, 2kg of hydroxyethyl cellulose, 0.6kg of N-hydroxyethyl acrylamide, 2.6kg of polydimethylsiloxane copolymer emulsion and 0.3kg of modified ethylene-vinyl acetate copolymer emulsion are weighed and sequentially put into a stirring barrel, and stirred for 30min at the rotating speed of 100r/min to obtain the treating agent.
The VAE emulsion has a solids content of 57% and a viscosity of 4000 mPas at 25 ℃; the solid content of the modified ethylene-vinyl acetate copolymer emulsion is 50%, and the viscosity of the modified ethylene-vinyl acetate copolymer emulsion is 230 mPas at 25 ℃; the solids content of the polydimethylsiloxane copolymer emulsion was 45% and the viscosity at 25℃was 1600mm 2 /s。
Preparation example 3
A treating agent is obtained by the following method:
5kg of VAE emulsion, 3kg of hydroxyethyl cellulose, 0.9kg of N-hydroxyethyl acrylamide, 3.2kg of polydimethylsiloxane copolymer emulsion and 0.5kg of modified ethylene-vinyl acetate copolymer emulsion are weighed and sequentially placed into a stirring barrel, and stirred for 30min at the rotating speed of 100r/min to obtain the treating agent.
The VAE emulsion has a solids content of 58% and a viscosity of 4200 mPas at 25 ℃; the solid content of the modified ethylene-vinyl acetate copolymer emulsionThe amount was 52% and the viscosity at 25℃was 300 mPas; the solids content of the polydimethylsiloxane copolymer emulsion was 45% and the viscosity at 25℃was 3000mm 2 /s。
Preparation of comparative example
Preparation of comparative example 1
The preparation comparative example 1 is different from the preparation example 1 in that: the polydimethylsiloxane copolymer emulsion was replaced with a VAE emulsion in equal amounts.
Preparation of comparative example 2
The preparation comparative example 2 is different from the preparation example 1 in that: the VAE emulsion was replaced equally with a polydimethylsiloxane copolymer emulsion.
Preparation of comparative example 3
The preparation comparative example 3 is different from the preparation example 1 in that: the hydroxyethyl cellulose is replaced equally with a VAE emulsion.
Preparation of comparative example 4
The preparation comparative example 4 is different from the preparation example 1 in that: n-hydroxyethyl acrylamide was replaced equally with a VAE emulsion.
Examples
Example 1
The wood silica gel composite material is prepared by the following process:
step 1: weighing 10kg of oak powder, uniformly mixing with 3kg of treating agent, and putting into an oven for drying at 70 ℃ for 20min to obtain treated wood powder;
step 2: putting 20kg of silicone rubber (methyl vinyl silicone rubber compound) into a rubber mixing machine for rubber mixing, adding 0.2kg of platinum vulcanizing agent when the surface of the rubber material on the rubber mixing machine is smooth, continuously mixing for 10min, fully and uniformly mixing the platinum vulcanizing agent, adding 1kg of treated wood powder, and continuously stirring after each batch addition is finished, so that the silicone rubber and the treated wood powder are fully and uniformly mixed to obtain wood powder rubber material;
step 3: and (3) placing the wood powder sizing material into a mould, and performing thermoforming at 120 ℃ for 150 seconds to obtain the wood silica gel composite material.
Wherein the particle size of oak powder is 20 μm. The treating agent is KH550 silane coupling agent and the weight (kg) ratio of water is 1: 10.
Example 2
Example 2 differs from example 1 in that: in step 1, the amount of the commercially available treating agent is 5kg; in step 2, the amount of wood flour treated was 3kg.
Example 3
Example 3 differs from example 1 in that: in step 1, the amount of the commercially available treating agent was 7kg; in step 2, the amount of wood flour treated was 5kg.
Example 4
Example 4 differs from example 2 in that: the silicone rubber is prepared from methyl vinyl silicone rubber compound, fluorosilicone compound and nitrile silicone compound according to the weight (kg) ratio of 1:0.1:0.3 and thermoforming at 180℃for 200s.
Example 5
Example 5 differs from example 4 in that: the sources of the treatment agents are different, and are shown in table 1;
TABLE 1 Experimental data for examples 5-11
| Examples | Source of treatment agent |
| Example 5 | Preparation example 1 |
| Example 6 | Preparation example 2 |
| Example 7 | Preparation example 3 |
| Example 8 | Preparation of comparative example 1 |
| Example 9 | Preparation of comparative example 2 |
| Example 10 | Preparation of comparative example 3 |
| Example 11 | Preparation of comparative example 4 |
Comparative example
Comparative example 1
Comparative example 1 differs from example 1 in that: the silicone rubber was PVC powder (average molecular weight 5 ten thousand, mesh number 300 mesh). The specific process is as follows:
and (3) putting 20kg of PVC powder and 1kg of treated wood powder into a high-speed mixer for uniform mixing, putting into a double-roller plasticator for plasticating at the temperature of 150 ℃ to obtain a plasticated mixture, transferring into a vulcanizing agent for hot press molding at the temperature of 180 ℃ and the pressure of 20N for 5min, and obtaining the wood-plastic mixed material.
Comparative example 2
Comparative example 2 is different from example 1 in that: the silicon rubber is natural rubber (the manufacturer's name is) and the specific process is as follows:
step 2: putting 20kg of natural rubber into a rubber mixing machine for rubber mixing, adding 0.2kg of dialkyl peroxide when the surface of the rubber material on the rubber mixing machine is smooth, continuously mixing for 10min, fully and uniformly mixing the dialkyl peroxide, adding 1kg of treated wood powder, and continuously stirring after each batch addition is finished, so that the silicon rubber and the treated wood powder are fully and uniformly mixed, and obtaining the wood powder rubber material;
step 3: and (3) placing the wood powder sizing material into a mould, and performing thermoforming at 120 ℃ for 150 seconds to obtain the wood rubber composite material.
Comparative example 3
Comparative example 3 is different from example 1 in that: the amount of wood flour treated was 10kg.
Comparative example 4
Comparative example 4 is different from example 1 in that: the amount of wood flour treated was 10kg based on comparative example 1.
Performance test
The materials obtained in examples 1 to 11 and comparative examples 1 to 4 were cut to form test pieces, and the following performance tests were conducted.
1. Physical Properties
The tensile strength and the elongation at break are detected by referring to a GB/T1040-1992 plastic tensile property test method, the hardness is detected by adopting a JC505-LX-D Shore D hardness detector, and experimental data are specifically shown in table 2;
2. aging resistance
Taking 3 batches of test samples, respectively placing the test samples into a thermal oxidation aging box and an ultraviolet aging box at 80 ℃, respectively taking out the test samples for 1 day, 3 days and 7 days, detecting the broken tensile strength, marking the broken tensile strength as A2, marking the tensile strength before aging as A1, and carrying out the same test standard, wherein the change rate of the tensile strength is = [ (A1-A2)/A1 ]. Times.100%; the specific data are shown in Table 3.
Condition setting of an ultraviolet aging box:
the test cycle time is 4 hours of ultraviolet exposure, then 4 hours of condensation, the ultraviolet exposure temperature is 50, and the condensation temperature is 50 ℃;
TABLE 2 Experimental data for examples 1-11 and comparative examples 1-4
It can be seen from the combination of example 1 and comparative examples 1-2 and the combination of table 2 that the tensile strength of example 1 is higher than that of comparative examples 1-2, and that the elongation at break of comparative example 2 is higher, but the heat resistance and aging resistance of natural rubber are inferior, so that the wood-silica gel composite material of the present application has better heat resistance, aging resistance and mechanical properties in comparison.
As can be seen from comparative examples 1 and 3, the elongation at break and tensile strength values of comparative example 3 are greatly different from those of example 1, indicating that the amount of the treated wood flour of the present application mixed with the silicone rubber is preferable. And the mechanical properties obtained are also better.
Comparative example 1, comparative examples 3-4, comparative example 4 showed significantly lower elongation at break, tensile strength than examples 1 and comparative examples 3-4, demonstrating that the physical properties of the resulting wood-silica gel composite are better than wood-plastic composites when PVC and silicone rubber are added to the same treated wood flour.
Comparing example 1 with example 4, it can be seen that the elongation at break and tensile strength of example 4 are higher than those of example 1, and the hardness is also significantly reduced, which means that the mechanical properties of the wood silica gel composite material are further improved when the methyl vinyl silicone rubber compound, the fluorosilicone compound, and the nitrile silicone compound are compounded.
Comparing examples 4 and examples 5-7, it can be seen that the elongation at break and tensile strength in examples 5-7 are significantly improved, which indicates that the treated wood flour obtained by treating the wood flour with the treating agent of the present application has better compatibility with silicone rubber, and the formed wood-silica gel composite material has better physical properties.
Comparative examples 5 and examples 8-11, examples 8-11 all had lower elongation at break and tensile strength than example 5, indicating that the treated powder obtained when compounded with VAE emulsion, hydroxyethyl cellulose, N-hydroxyethyl acrylamide, polydimethylsiloxane copolymer emulsion, modified ethylene vinyl acetate copolymer emulsion, and the resulting treating agent was used for wood flour treatment had good compatibility with silicone rubber.
TABLE 3 aging Performance data for example 1, example 4, example 5, examples 8-11 and comparative examples 1-2
As can be seen from comparative examples 1 and 1-2, the tensile strength change rate after thermal oxidation aging and the tensile strength change rate after ultraviolet aging of example 1 are lower than those of comparative examples 1-2, and the aging change rate of comparative examples 1-2 is larger with the extension of time, which indicates that the aging resistance and the heat resistance of the wood-silica gel composite material are better.
Comparing example 1 with example 4, it can be seen that the tensile strength change rate after thermal oxidation aging and the tensile strength change rate after ultraviolet aging of example 1 are both higher than those of example 4, which shows that the synergy is achieved when the methyl vinyl silicone rubber compound, the fluorosilicone compound and the nitrile silicone compound are compounded, and the mechanical properties are improved, and the aging resistance and the heat resistance are further improved.
As for comparative example 5 of example 4, it can be seen that the tensile strength change rate after thermal oxidation aging and the tensile strength change rate after ultraviolet aging of example 4 are both higher than those of example 5, which means that the treated wood flour is treated by the treating agent obtained by the present application, thereby obtaining the treated wood flour filled in silicone rubber, and not only further improving mechanical properties but also further improving aging resistance.
Comparative examples 5 and examples 8 to 11, examples 8 to 11 all have higher tensile strength change rates after thermal oxidative aging and ultraviolet aging than example 5, indicating that when VAE emulsion, hydroxyethyl cellulose, N-hydroxyethyl acrylamide, polydimethylsiloxane copolymer emulsion and modified ethylene-vinyl acetate copolymer emulsion are compounded, the obtained treating agent has good compatibility with silicone rubber after wood powder treatment, so that the wood silica gel has better mechanical property and aging resistance.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (10)
1. The production process of the wood silica gel composite material is characterized by comprising the following steps of:
step 1: treating the wood powder by using a treating agent, and drying to obtain treated wood powder;
step 2: mixing silicone rubber, vulcanizing agent and pigment for 10-30min, adding treated wood powder, and mixing uniformly to obtain wood powder sizing material;
step 3: and (3) performing thermoforming on the wood powder sizing material to obtain the wood silica gel composite material.
2. The process for producing a wood-silica gel composite material according to claim 1, wherein: in the step 1, the dosage ratio of the wood powder to the treating agent is 1: (0.3-0.7).
3. The process for producing a wood-silica gel composite material according to claim 1, wherein: the dosage ratio of the silicon rubber, the vulcanizing agent and the pigment in the step 2 is 1: (0.01-0.05): (0-0.08); the dosage ratio of the silicon rubber to the treated wood powder is 1 (0.05-0.25).
4. The process for producing a wood-silica gel composite material according to claim 1, wherein: the drying temperature in the step 2) is 70-90 ℃ and the drying time is 10-30min; the molding temperature in the step 3 is 110-150 ℃ and the molding time is 100-200s.
5. The process for producing a wood-silica gel composite material according to claim 1, wherein: the grain size of the wood powder is 1-40 mu m.
6. The process for producing a wood-silica gel composite material according to claim 1, wherein: the wood powder is one or more of oak wood powder, pine wood powder, poplar wood powder, fragrant wood powder and Chinese camphor wood powder.
7. The process for producing a wood-silica gel composite material according to claim 1, wherein: the silicone rubber is one or more of methyl vinyl silicone rubber compound, fluorosilicone compound and nitrile silicone compound.
8. The process for producing a wood-silica gel composite material according to any one of claims 1 to 8, wherein the treating agent comprises the following raw materials in parts by weight:
5-10 parts of VAE emulsion
1-3 parts of hydroxyethyl cellulose
0.3-0.9 part of N-hydroxyethyl acrylamide
1-3 parts of dihydroxymethyl dihydroxyethylene urea resin
1.8 to 3.2 parts of polydimethylsiloxane copolymer emulsion
0.1-0.5 part of modified ethylene-vinyl acetate copolymer emulsion.
9. The process for producing a wood-silica gel composite material according to claim 8, wherein: the solid content of the VAE emulsion is 55-58%, and the viscosity of the VAE emulsion is 3500-4500 mPa.s at 25 ℃; the solid content of the modified ethylene-vinyl acetate copolymer emulsion is 48-52%, and the viscosity of the modified ethylene-vinyl acetate copolymer emulsion is 200-300 mPa.s at 25 ℃; the solid content of the polydimethylsiloxane copolymer emulsion is 38-45%, and the viscosity is 1000-3000mm at 25 DEG C 2 /s。
10. A wooden silica gel decorative board which is characterized in that: is prepared by the production process of the wood silica gel composite material according to any one of claims 1 to 9.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6142557A (en) * | 1984-08-06 | 1986-03-01 | Matsushita Electric Works Ltd | Natural wood-like resin molding |
| JP2002128976A (en) * | 2000-10-26 | 2002-05-09 | A & M Styrene Co Ltd | Resin composition and resin molded product having wood grain pattern |
| JP2004323802A (en) * | 2003-04-30 | 2004-11-18 | Pentel Corp | Elastic body, method for producing the same, shaft body by using the same and writing tool |
| US20050165138A1 (en) * | 2004-01-23 | 2005-07-28 | Jeannie Holmes | Synthetic cork compound |
| CN107260007A (en) * | 2016-04-07 | 2017-10-20 | 六安载丰新材料有限公司 | A kind of woody odor silica gel food pad |
-
2023
- 2023-10-09 CN CN202311299617.3A patent/CN117210016A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6142557A (en) * | 1984-08-06 | 1986-03-01 | Matsushita Electric Works Ltd | Natural wood-like resin molding |
| JP2002128976A (en) * | 2000-10-26 | 2002-05-09 | A & M Styrene Co Ltd | Resin composition and resin molded product having wood grain pattern |
| JP2004323802A (en) * | 2003-04-30 | 2004-11-18 | Pentel Corp | Elastic body, method for producing the same, shaft body by using the same and writing tool |
| US20050165138A1 (en) * | 2004-01-23 | 2005-07-28 | Jeannie Holmes | Synthetic cork compound |
| CN107260007A (en) * | 2016-04-07 | 2017-10-20 | 六安载丰新材料有限公司 | A kind of woody odor silica gel food pad |
Non-Patent Citations (1)
| Title |
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| 段予忠 主编: "《现代精细化工高新技术与产品合成工艺》", 31 May 1992, 科学技术文献出版社, pages: 264 - 76 * |
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