Rice hull fiber synthetic resin material and preparation method thereof

Abstract

The invention discloses a rice hull fiber synthetic resin material preparation method, which comprises: 1, adding rice hull fiber into a modification liquid according to a weight ratio of 2: 5, carrying out stirring modification treatment, finishing stirring, carrying out suction filtration, and drying to obtain modified rice hull fiber; according to the rice hull fiber synthetic resin material, the rice hull fibers are treated through the modification liquid, then the silane coupling agent, the bisphenol A epoxy resin and the blender are coordinated and matched, and through coordinated synergism of the blender and the modified rice hull fibers, the strength and toughness performance of the rice hull fiber material of the product are coordinated and improved; meanwhile, the product is remarkable in acid corrosion resistance and heat resistance stability; sodium dodecyl benzene sulfonate, silicon carbide whiskers and a lanthanum chloride solution in the modification solution are blended to form a whisker solution.

Description

Technical Field

[0001] The invention relates to the technical field of synthetic resin materials, and in particular to a rice husk fiber synthetic resin material and a preparation method thereof. Background Art

[0002] Tableware, furniture, kitchenware and other daily necessities on the market are all made of plastic, wood, bamboo and other products. Such products are costly, non-degradable and not environmentally friendly. Plastic is not only non-degradable, but also recognized as "white pollution", and it also destroys the permeability of the soil. Wood products require deforestation and there is wastewater pollution during the manufacturing process. The rice husk fiber material used in existing resins has poor strength and toughness, and it is difficult to coordinate and improve the two. At the same time, the product has poor acid and heat resistance, which limits the efficiency of the product. Summary of the invention

[0003] In view of the defects of the prior art, the object of the present invention is to provide a rice husk fiber synthetic resin material and a preparation method thereof to solve the problems raised in the above background technology.

[0004] The present invention solves the technical problem by adopting the following technical solution: The present invention provides a method for preparing a rice husk fiber synthetic resin material, comprising the following steps: Step 1: adding rice husk fiber into the modification liquid at a weight ratio of 2:5 and stirring for modification treatment, filtering and drying after the stirring is completed to obtain modified rice husk fiber; Step 2: Weigh the raw materials according to weight: 45-55 parts of bisphenol A epoxy resin, 5-10 parts of silane coupling agent and 4-7 parts of conditioning agent, 2-5 parts of modified rice husk fiber, 2-5 parts of 2-phenylimidazole curing agent and 2-5 parts of antioxidant 1010; Step 3: Mix the raw materials and then feed them into a twin-screw extruder for extrusion at a temperature of 170° C. After the extrusion is completed, a rice husk fiber synthetic resin material is obtained.

[0005] Preferably, the silane coupling agent is silane coupling agent KH560.

[0006] Preferably, the stirring speed of the stirring modification treatment is 450-550 r / min, and the stirring time is 20-30 min.

[0007] Preferably, the preparation method of the modified liquid is: S1: adding 2-4 parts of sodium dodecylbenzene sulfonate and 1-3 parts of silicon carbide whiskers to 4-7 parts of lanthanum chloride solution to obtain a whisker solution; S2: adding 2-4 parts of nano-silicon dioxide and 1-3 parts of sodium citrate solution to 4-7 parts of phosphate buffer solution and stirring thoroughly to obtain nano-silicon dioxide liquid; S3: The whisker solution and the nano-silica solution are mixed in a weight ratio of 5:3 and ball-milled at a speed of 1000-1500 r / min for 2 h to obtain a modified solution.

[0008] Preferably, the mass fraction of the lanthanum chloride solution is 2-5%; the mass fraction of the sodium citrate solution is 5-8%.

[0009] Preferably, the pH value of the phosphate buffer solution is 5.5.

[0010] Preferably, the preparation method of the conditioning agent is: S11: placing the flaky talc in a proton irradiation box and irradiating it for 5-10 minutes at an irradiation power of 350-400 W, and obtaining an irradiated flaky talc after the irradiation is completed; S12: 4-7 parts of irradiated flaky talc, 2-5 parts of yttrium oxide, 4-7 parts of dopamine hydrochloride solution and 1-3 parts of nano-silica sol are mixed and ball-milled at a speed of 550-650 r / min for 1 hour. After the ball-milling is completed, the mixture is washed with water and dried to obtain a conditioning agent.

[0011] Preferably, the mass fraction of the dopamine hydrochloride solution is 2-5%.

[0012] Preferably, the blending ball milling treatment is carried out at a rotation speed of 1000-1500 r / min, and the ball milling is carried out for 2 hours.

[0013] A method for preparing a rice husk fiber synthetic resin material and a rice husk fiber synthetic resin material.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The rice husk fiber synthetic resin material of the invention adopts rice husk fiber treated with a modifying liquid, and then coordinated with a silane coupling agent, a bisphenol A epoxy resin and a blending agent. The strength and toughness of the rice husk fiber material of the product are coordinated and improved through the coordinated synergy of the blending agent and the modified rice husk fiber, and the acid corrosion resistance and heat resistance stability of the product are remarkable. Sodium dodecylbenzene sulfonate, silicon carbide whiskers and lanthanum chloride solution in the modifying liquid are blended to form a whisker liquid, whiskers with a whisker-like structure are blended in a nano silicon dioxide liquid, the whiskers and the raw materials in the modifying liquid are blended with nano silicon dioxide with a high specific surface area, and the interface of the system is enhanced through the mutual matching and mutual assistance between the raw materials, thereby improving the performance of the product. At the same time, the blending agent adopts flaky talcum powder that is subjected to proton irradiation, and then is blended with yttrium oxide, dopamine hydrochloride solution and nano silica sol for ball milling treatment. The blending agent is improved through the coordination between the raw materials, and the system performance is jointly enhanced, thereby further improving the performance of the product. DETAILED DESCRIPTION

[0015] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] A method for preparing a rice husk fiber synthetic resin material according to this embodiment comprises the following steps: Step 1: adding rice husk fiber into the modification liquid at a weight ratio of 2:5 and stirring for modification treatment, filtering and drying after the stirring is completed to obtain modified rice husk fiber; Step 2: Weigh the raw materials according to weight: 45-55 parts of bisphenol A epoxy resin, 5-10 parts of silane coupling agent and 4-7 parts of conditioning agent, 2-5 parts of modified rice husk fiber, 2-5 parts of 2-phenylimidazole curing agent and 2-5 parts of antioxidant 1010; Step 3: Mix the raw materials and then feed them into a twin-screw extruder for extrusion at a temperature of 170° C. After the extrusion is completed, a rice husk fiber synthetic resin material is obtained.

[0017] The silane coupling agent of this embodiment is silane coupling agent KH560.

[0018] The stirring speed of the stirring modification treatment in this embodiment is 450-550 r / min, and the stirring time is 20-30 min.

[0019] The preparation method of the modified liquid of this embodiment is: S1: adding 2-4 parts of sodium dodecylbenzene sulfonate and 1-3 parts of silicon carbide whiskers to 4-7 parts of lanthanum chloride solution to obtain a whisker solution; S2: adding 2-4 parts of nano-silicon dioxide and 1-3 parts of sodium citrate solution to 4-7 parts of phosphate buffer solution and stirring thoroughly to obtain nano-silicon dioxide liquid; S3: The whisker solution and the nano-silica solution were mixed in a weight ratio of 5:3 and ball-milled at a speed of 1000-1500 r / min for 2 h to obtain the modified solution. The mass fraction of the lanthanum chloride solution in this embodiment is 2-5%; the mass fraction of the sodium citrate solution is 5-8%.

[0020] The pH value of the phosphate buffer solution in this example is 5.5.

[0021] The preparation method of the blending agent of this embodiment is: S11: placing the flaky talc in a proton irradiation box and irradiating it for 5-10 minutes at an irradiation power of 350-400 W, and obtaining an irradiated flaky talc after the irradiation is completed; S12: 4-7 parts of irradiated flaky talc, 2-5 parts of yttrium oxide, 4-7 parts of dopamine hydrochloride solution and 1-3 parts of nano-silica sol are mixed and ball-milled at a speed of 550-650 r / min for 1 hour. After the ball-milling is completed, the mixture is washed with water and dried to obtain a conditioning agent.

[0022] The mass fraction of the dopamine hydrochloride solution in this embodiment is 2-5%.

[0023] The rotation speed of the blending ball milling process in this embodiment is 1000-1500r / min, and the ball milling is 2h.

[0024] Example 1. A method for preparing a rice husk fiber synthetic resin material according to this embodiment comprises the following steps: Step 1: adding rice husk fiber into the modification liquid at a weight ratio of 2:5 and stirring for modification treatment, filtering and drying after the stirring is completed to obtain modified rice husk fiber; Step 2: Weigh the raw materials according to weight: 45 parts of bisphenol A epoxy resin, 5 parts of silane coupling agent and 4 parts of conditioning agent, 2 parts of modified rice husk fiber, 2 parts of 2-phenylimidazole curing agent and 2 parts of antioxidant 1010; Step 3: Mix the raw materials and then feed them into a twin-screw extruder for extrusion at a temperature of 170° C. After the extrusion is completed, a rice husk fiber synthetic resin material is obtained.

[0025] The silane coupling agent of this embodiment is silane coupling agent KH560.

[0026] The stirring speed of the stirring modification treatment in this embodiment is 450 r / min, and the stirring time is 20 min.

[0027] The preparation method of the modified liquid of this embodiment is: S1: adding 2 parts of sodium dodecylbenzene sulfonate and 1 part of silicon carbide whisker to 4 parts of lanthanum chloride solution to obtain whisker solution; S2: Add 2 parts of nano-silica and 1 part of sodium citrate solution to 4 parts of phosphate buffer solution and stir thoroughly to obtain nano-silica liquid; S3: The whisker solution and the nano-silica solution were mixed and ball-milled at a weight ratio of 5:3. The ball-milling speed was 1000 r / min and the ball-milling was performed for 2 h. After the ball-milling was completed, the modified solution was obtained. The mass fraction of the lanthanum chloride solution in this embodiment is 2%; the mass fraction of the sodium citrate solution is 5%.

[0028] The pH value of the phosphate buffer solution in this example is 5.5.

[0029] The preparation method of the blending agent of this embodiment is: S11: placing the flaky talc in a proton irradiation box and irradiating for 5 minutes at an irradiation power of 350 W, and then completing the irradiation to obtain an irradiated flaky talc agent; S12: 4 parts of irradiated flaky talc, 2 parts of yttrium oxide, 4 parts of dopamine hydrochloride solution and 1 part of nano-silica sol are mixed and ball-milled at a speed of 550 r / min for 1 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a blending agent.

[0030] The mass fraction of the dopamine hydrochloride solution in this embodiment is 2%.

[0031] The rotation speed of the blending ball milling process in this embodiment is 10000 r / min, and the ball milling is 2h.

[0032] Example 2. A method for preparing a rice husk fiber synthetic resin material according to this embodiment comprises the following steps: Step 1: adding rice husk fiber into the modification liquid at a weight ratio of 2:5 and stirring for modification treatment, filtering and drying after the stirring is completed to obtain modified rice husk fiber; Step 2: Weigh the raw materials according to weight: 55 parts of bisphenol A epoxy resin, 10 parts of silane coupling agent and 7 parts of conditioning agent, 5 parts of modified rice husk fiber, 5 parts of 2-phenylimidazole curing agent and 5 parts of antioxidant 1010; Step 3: Mix the raw materials and then feed them into a twin-screw extruder for extrusion at a temperature of 170° C. After the extrusion is completed, a rice husk fiber synthetic resin material is obtained.

[0033] The silane coupling agent of this embodiment is silane coupling agent KH560.

[0034] The stirring speed of the stirring modification treatment in this embodiment is 550 r / min, and the stirring time is 30 min.

[0035] The preparation method of the modified liquid of this embodiment is: S1: adding 4 parts of sodium dodecylbenzene sulfonate and 3 parts of silicon carbide whiskers to 7 parts of lanthanum chloride solution to obtain a whisker solution; S2: adding 4 parts of nano-silicon dioxide and 3 parts of sodium citrate solution to 7 parts of phosphate buffer solution and stirring thoroughly to obtain nano-silicon dioxide liquid; S3: The whisker solution and the nano-silica solution were mixed in a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 2 h to obtain the modified solution. The mass fraction of the lanthanum chloride solution in this embodiment is 5%; the mass fraction of the sodium citrate solution is 8%.

[0036] The pH value of the phosphate buffer solution in this example is 5.5.

[0037] The preparation method of the blending agent of this embodiment is: S11: placing the flaky talc in a proton irradiation box and irradiating for 10 minutes at an irradiation power of 400 W, and then completing the irradiation to obtain an irradiated flaky talc agent; S12: 7 parts of irradiated flaky talc, 5 parts of yttrium oxide, 7 parts of dopamine hydrochloride solution and 3 parts of nano-silica sol are mixed and ball-milled at a speed of 650 r / min for 1 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a blending agent.

[0038] The mass fraction of the dopamine hydrochloride solution in this embodiment is 5%.

[0039] The rotation speed of the blending ball milling process in this embodiment is 1500r / min, and the ball milling is 2h.

[0040] Example 3. A method for preparing a rice husk fiber synthetic resin material according to this embodiment comprises the following steps: Step 1: adding rice husk fiber into the modification liquid at a weight ratio of 2:5 and stirring for modification treatment, filtering and drying after the stirring is completed to obtain modified rice husk fiber; Step 2: Weigh the raw materials according to weight: 50 parts of bisphenol A epoxy resin, 7.5 parts of silane coupling agent and 5.5 parts of conditioning agent, 3.5 parts of modified rice husk fiber, 3.5 parts of 2-phenylimidazole curing agent and 3.5 parts of antioxidant 1010; Step 3: Mix the raw materials and then feed them into a twin-screw extruder for extrusion at a temperature of 170° C. After the extrusion is completed, a rice husk fiber synthetic resin material is obtained.

[0041] The silane coupling agent of this embodiment is silane coupling agent KH560.

[0042] The stirring speed of the stirring modification treatment in this embodiment is 500 r / min, and the stirring time is 25 min.

[0043] The preparation method of the modified liquid of this embodiment is: S1: adding 3 parts of sodium dodecylbenzene sulfonate and 2 parts of silicon carbide whiskers to 5.5 parts of lanthanum chloride solution to obtain a whisker solution; S2: Add 3 parts of nano-silica and 2 parts of sodium citrate solution to 5.5 parts of phosphate buffer solution and stir thoroughly to obtain nano-silica liquid; S3: The whisker solution and the nano-silica solution were mixed and ball-milled at a weight ratio of 5:3. The ball-milling speed was 1250 r / min for 2 h. After the ball-milling was completed, the modified solution was obtained. The mass fraction of the lanthanum chloride solution in this embodiment is 3.5%; the mass fraction of the sodium citrate solution is 6.5%.

[0044] The pH value of the phosphate buffer solution in this example is 5.5.

[0045] The preparation method of the blending agent of this embodiment is: S11: placing the flaky talc in a proton irradiation box and irradiating for 7.5 minutes at an irradiation power of 360 W, and then completing the irradiation to obtain an irradiated flaky talc agent; S12: 5.5 parts of irradiated flaky talc, 3.5 parts of yttrium oxide, 5.5 parts of dopamine hydrochloride solution and 2 parts of nano-silica sol are mixed and ball-milled at a speed of 600 r / min for 1 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a blending agent.

[0046] The mass fraction of the dopamine hydrochloride solution in this embodiment is 3.5%.

[0047] The rotation speed of the blending ball milling process in this embodiment is 1250 r / min, and the ball milling is 2 h.

[0048] Example 4. A method for preparing a rice husk fiber synthetic resin material according to this embodiment comprises the following steps: Step 1: adding rice husk fiber into the modification liquid at a weight ratio of 2:5 and stirring for modification treatment, filtering and drying after the stirring is completed to obtain modified rice husk fiber; Step 2: Weigh the raw materials according to weight: 42 parts of bisphenol A epoxy resin, 6 parts of silane coupling agent and 5 parts of conditioning agent, 3 parts of modified rice husk fiber, 3 parts of 2-phenylimidazole curing agent and 3 parts of antioxidant 1010; Step 3: Mix the raw materials and then feed them into a twin-screw extruder for extrusion at a temperature of 170° C. After the extrusion is completed, a rice husk fiber synthetic resin material is obtained.

[0049] The silane coupling agent of this embodiment is silane coupling agent KH560.

[0050] The stirring speed of the stirring modification treatment in this embodiment is 460 r / min, and the stirring time is 22 min.

[0051] The preparation method of the modified liquid of this embodiment is: S1: adding 3 parts of sodium dodecylbenzene sulfonate and 2 parts of silicon carbide whiskers to 5 parts of lanthanum chloride solution to obtain a whisker solution; S2: Add 3 parts of nano-silica and 2 parts of sodium citrate solution to 5 parts of phosphate buffer solution and stir thoroughly to obtain nano-silica liquid; S3: The whisker solution and the nano-silica solution were mixed and ball-milled at a weight ratio of 5:3. The ball-milling speed was 1200 r / min and the ball-milling was performed for 2 h. After the ball-milling was completed, the modified solution was obtained. The mass fraction of the lanthanum chloride solution in this embodiment is 3%; the mass fraction of the sodium citrate solution is 6%.

[0052] The pH value of the phosphate buffer solution in this example is 5.5.

[0053] The preparation method of the blending agent of this embodiment is: S11: placing the flaky talc in a proton irradiation box and irradiating for 6 minutes at an irradiation power of 360 W, and then completing the irradiation to obtain an irradiated flaky talc agent; S12: 5 parts of irradiated flaky talc, 3 parts of yttrium oxide, 5 parts of dopamine hydrochloride solution and 2 parts of nano-silica sol are mixed and ball-milled at a speed of 560 r / min for 1 hour. After the ball-milling is completed, the mixture is washed with water and dried to obtain a blending agent.

[0054] The mass fraction of the dopamine hydrochloride solution in this embodiment is 3%.

[0055] The rotation speed of the blending ball milling process in this embodiment is 1200 r / min, and the ball milling is 2 h.

[0056] Comparative Example 1. The difference from Example 3 is that no modification liquid treatment was used.

[0057] Comparative Example 2. The difference from Example 3 is that no nano-silicon dioxide liquid is added to the modified liquid.

[0058] Comparative Example 3. The difference from Example 3 is that no whisker solution is added to the modified solution.

[0059] Comparative Example 4. The difference from Example 3 is that no silicon carbide whiskers are added to the whisker liquid.

[0060] Comparative Example 5. The difference from Example 3 is that no blending agent is added.

[0061] Comparative Example 6. The difference from Example 3 is that no yttrium oxide or nano-silica sol is added to the conditioning agent.

[0062] The performance of the products of Examples 1-4 and Comparative Examples 1-6 was tested under normal conditions, and then placed in 2% hydrochloric acid for 24 hours, and then placed at 65°C for 12 hours. The above is one cycle, and the cycle is repeated 10 times to test the acid resistance and heat resistance stability of the products. The test is as follows: It can be seen from comparative examples 1-6 and embodiment 3 that the product of embodiment 3 has excellent bending strength, tensile elongation at break electrical properties, and the two properties can be improved in a coordinated manner. At the same time, the product has significant effects under acid and heat resistance conditions. The present invention does not use modified liquid treatment and does not add a blending agent, and the performance of the product has a significant tendency to deteriorate. The synergistic effect of the two is used to achieve the most significant product performance effect. When no nano-silicon dioxide liquid, no whisker liquid, no silicon carbide whiskers, no conditioning agent, and no yttrium oxide or nano-silica sol are added to the modifying liquid, the performance of the product tends to deteriorate. The modifying liquid obtained by the specific method of the present invention is combined with the conditioning agent, and the performance effect of the product is the most significant. Other methods are not as obvious as the effect of the present invention.

[0063] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for preparing a rice husk fiber synthetic resin material, characterized in that: The following steps are involved: Step 1: adding rice husk fiber into the modification liquid at a weight ratio of 2:5 and stirring for modification treatment, filtering and drying after the stirring is completed to obtain modified rice husk fiber; Step 2: Weigh the raw materials by weight: 45-55 parts of bisphenol A epoxy resin, 5-10 parts of silane coupling agent and 4-7 parts of conditioning agent, 2-5 parts of modified rice husk fiber, 2-5 parts of 2-phenylimidazole curing agent and 2-5 parts of antioxidant 1010; Step 3: Mix the raw materials and then feed them into a twin-screw extruder for extrusion at a temperature of 170°C. After the extrusion is completed, a rice husk fiber synthetic resin material is obtained.

2. The method for preparing a rice husk fiber synthetic resin material according to claim 1, characterized in that: The silane coupling agent is silane coupling agent KH560.

3. The method for preparing a rice husk fiber synthetic resin material according to claim 1, characterized in that: The stirring speed of the stirring modification treatment is 450-550 r / min, and the stirring time is 20-30 min.

4. The method for preparing a rice husk fiber synthetic resin material according to claim 1, characterized in that: The preparation method of the modified liquid is: S1: adding 2-4 parts of sodium dodecylbenzene sulfonate and 1-3 parts of silicon carbide whiskers to 4-7 parts of lanthanum chloride solution to obtain a whisker solution; S2: adding 2-4 parts of nano-silicon dioxide and 1-3 parts of sodium citrate solution to 4-7 parts of phosphate buffer solution and stirring thoroughly to obtain nano-silicon dioxide liquid; S3: The whisker solution and the nano-silica solution are mixed in a weight ratio of 5:3 and ball-milled at a speed of 1000-1500 r / min for 2 h to obtain a modified solution.

5. The method for preparing a rice husk fiber synthetic resin material according to claim 4, characterized in that: The mass fraction of the lanthanum chloride solution is 2-5%; the mass fraction of the sodium citrate solution is 5-8%.

6. The method for preparing a rice husk fiber synthetic resin material according to claim 4, characterized in that: The pH value of the phosphate buffer solution is 5.

5.

7. The method for preparing a rice husk fiber synthetic resin material according to claim 1, characterized in that: The preparation method of the conditioning agent is: S11: placing the flaky talc in a proton irradiation box and irradiating it for 5-10 minutes at an irradiation power of 350-400 W, and obtaining an irradiated flaky talc after the irradiation is completed; S12: 4-7 parts of irradiated flaky talc, 2-5 parts of yttrium oxide, 4-7 parts of dopamine hydrochloride solution and 1-3 parts of nano-silica sol are mixed and ball-milled at a speed of 550-650 r / min for 1 hour. After the ball-milling is completed, the mixture is washed with water and dried to obtain a conditioning agent.

8. The method for preparing a rice husk fiber synthetic resin material according to claim 7, characterized in that: The mass fraction of the dopamine hydrochloride solution is 2-5%.

9. The method for preparing a rice husk fiber synthetic resin material according to claim 7, characterized in that: The rotation speed of the blending ball milling treatment is 1000-1500 r / min, and the ball milling is 2 hours.

10. A rice husk fiber synthetic resin material prepared by the method for preparing a rice husk fiber synthetic resin material as claimed in any one of claims 1 to 9.

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