Bamboo-plastic composite material production method

Abstract

The invention relates to a bamboo-plastic composite material production method, which comprises: recovering a PE material, grinding the PE material to 30 mesh, taking 50-55 parts by weight of the ground PE material, 10-15 parts by weight of modified bamboo fiber and 4-7 parts by weight of an auxiliary agent, and uniformly mixing to obtain a material mixture; and extruding the mixed material by using a double-screw extruder, cutting and granulating, and controlling the length-diameter ratio of the extruder to be 40: 1. According to the bamboo-plastic composite material, the recycled PE material, the modified bamboo fibers and the auxiliaries are blended and matched, a bamboo-plastic composite material product is prepared through extrusion granulation, the bamboo fibers are modified and optimized through a specific process and then matched with the auxiliaries, and the auxiliaries are blended and reinforced through the silane coupling agent, the lubricant, the filler and the stabilizer. Boron nitride in the filler is matched into the modified liquid for stirring modification treatment, and the filler is optimized to be filled into the system, so that the performance effect of the system is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of bamboo-plastic composite materials, and in particular to a production method of the bamboo-plastic composite material. Background Art

[0002] Bamboo plastic composite material is a new type of composite material. It uses bamboo fiber filler and plastic (scraps or waste materials can be used) as the main raw materials, and is processed into various profiles through extrusion and hot pressing. Among them, bamboo plastic foam composite material has the advantages of light weight, less raw material consumption, wood-like appearance and low cost compared with general bamboo plastic composite materials.

[0003] The bamboo-plastic composite material used in the prior art is a composite of plastic and bamboo fiber, which easily affects the bonding interface performance between the raw materials, and instead reduces the mechanical properties, wear resistance, and corrosion resistance stability of the bamboo-plastic composite material. Summary of the invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a method for producing a bamboo-plastic composite material to solve the problems raised in the above background technology.

[0005] The present invention solves the technical problem by adopting the following technical solution: The present invention provides a method for producing a bamboo-plastic composite material, comprising the following steps: Step 1: Recover the PE material, grind the PE material to 30 mesh, take 50-55 parts by weight of the ground PE material, 10-15 parts of modified bamboo fiber and 4-7 parts of additives and mix them evenly to obtain a mixed material; Step 2: Extrude the mixed material through a twin-screw extruder and cut it into granules, control the aspect ratio of the extruder to be 40:1, the temperature of the extruder head to be 150-165° C., and the screw speed to be 120 r / min, to obtain a bamboo-plastic composite material.

[0006] Preferably, the preparation method of the modified bamboo fiber is: S01: pre-conditioning the bamboo fiber to obtain pre-conditioned bamboo fiber; The specific pre-adjustment method is: The bamboo fiber is first treated with proton irradiation at a power of 350-400W for 10-15 minutes, and then immersed in a sufficient amount of silane coupling agent solution and stirred evenly to obtain a bamboo fiber solution; S02: 2-4 parts of nano silicon dioxide, 1-3 parts of nano silica sol, and 2-5 parts of fly ash are mixed and added into 5-8 parts of sodium dodecylbenzene sulfonate solution and stirred thoroughly to obtain a modified solution; S03: immersing the silicon carbide whisker into a sufficient amount of sodium silicate solution and stirring sufficiently, then filtering and drying to obtain a silicon carbide whisker agent; S04: The bamboo fiber liquid, the modified liquid and the silicon carbide whisker agent are mixed and ball-milled in a weight ratio of 5:3:2. After the ball-milling is completed, the mixture is filtered and dried to obtain the modified bamboo fiber.

[0007] Preferably, the silane coupling agent liquid is prepared by mixing silane coupling agent, water and ethanol in a weight ratio of 2:1:5, at a mixing temperature of 50-55° C., for 20 min, and at a mixing speed of 450 r / min.

[0008] Preferably, the silane coupling agent is silane coupling agent KH550.

[0009] Preferably, the mass fraction of the sodium dodecylbenzene sulfonate solution is 2-5%; the mass fraction of the sodium silicate solution is 3-6%.

[0010] Preferably, the ball milling speed of the mixing ball milling treatment is 750-950 r / min, and the ball milling time is 20-30 min.

[0011] Preferably, the auxiliary agent comprises the following raw materials in parts by weight: 2-5 parts of silane coupling agent, 1-3 parts of lubricant, 3-5 parts of filler and 1-2 parts of stabilizer.

[0012] Preferably, the silane coupling agent is silane coupling agent KH560; the lubricant is stearic acid; and the stabilizer is antioxidant 1010.

[0013] Preferably, the preparation method of the filler is: The boron nitride is immersed in a modification liquid of 2-3 times the total amount of the boron nitride, and the modification liquid is stirred and treated. After the stirring is completed, the boron nitride is filtered and dried to obtain a filler; The modified liquid includes the following raw materials in parts by weight: 1-3 parts of nano-attapulgite, 2-4 parts of nano-titanium dioxide, 3-5 parts of yttrium nitrate solution and 2-3 parts of urea.

[0014] Preferably, the mass fraction of the yttrium nitrate solution is 2-5%; the stirring speed of the stirring modification treatment is 450-550r / min, and the stirring is for 1h.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The bamboo-plastic composite material of the present invention is prepared by blending recycled PE material, modified bamboo fiber and auxiliary agent, and is made into a bamboo-plastic composite material product by extrusion granulation. The bamboo fiber is modified and optimized by a specific process, and then blended with auxiliary agent. The auxiliary agent is blended and reinforced by a silane coupling agent, a lubricant, a filler and a stabilizer. The boron nitride in the filler is blended into a modified liquid and stirred for modification, and the filler is optimized and filled into the system, thereby further improving the performance effect of the system. DETAILED DESCRIPTION

[0016] 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.

[0017] A method for producing a bamboo-plastic composite material in this embodiment comprises the following steps: Step 1: Recover the PE material, grind the PE material to 30 mesh, take 50-55 parts by weight of the ground PE material, 10-15 parts of modified bamboo fiber and 4-7 parts of additives and mix them evenly to obtain a mixed material; Step 2: Extrude the mixed material through a twin-screw extruder and cut it into granules, control the aspect ratio of the extruder to be 40:1, the temperature of the extruder head to be 150-165° C., and the screw speed to be 120 r / min, to obtain a bamboo-plastic composite material.

[0018] The preparation method of the modified bamboo fiber of this embodiment is: S01: pre-conditioning the bamboo fiber to obtain pre-conditioned bamboo fiber; The specific pre-adjustment method is: The bamboo fiber is first treated with proton irradiation at a power of 350-400W for 10-15 minutes, and then immersed in a sufficient amount of silane coupling agent solution and stirred evenly to obtain a bamboo fiber solution; S02: 2-4 parts of nano silicon dioxide, 1-3 parts of nano silica sol, and 2-5 parts of fly ash are mixed and added into 5-8 parts of sodium dodecylbenzene sulfonate solution and stirred thoroughly to obtain a modified solution; S03: immersing the silicon carbide whisker into a sufficient amount of sodium silicate solution and stirring sufficiently, then filtering and drying to obtain a silicon carbide whisker agent; S04: The bamboo fiber liquid, the modified liquid and the silicon carbide whisker agent are mixed and ball-milled in a weight ratio of 5:3:2. After the ball-milling is completed, the mixture is filtered and dried to obtain the modified bamboo fiber.

[0019] The silane coupling agent liquid of this embodiment is prepared by mixing silane coupling agent, water and ethanol in a weight ratio of 2:1:5, with a mixing temperature of 50-55° C., mixing for 20 minutes and a mixing speed of 450 r / min.

[0020] The silane coupling agent of this embodiment is silane coupling agent KH550.

[0021] The mass fraction of the sodium dodecylbenzene sulfonate solution in this embodiment is 2-5%; the mass fraction of the sodium silicate solution is 3-6%.

[0022] The ball milling speed of the mixing ball milling process in this embodiment is 750-950r / min, and the ball milling time is 20-30min.

[0023] The auxiliary agent of this embodiment comprises the following raw materials in parts by weight: 2-5 parts of silane coupling agent, 1-3 parts of lubricant, 3-5 parts of filler and 1-2 parts of stabilizer.

[0024] The silane coupling agent of this embodiment is silane coupling agent KH560; the lubricant is stearic acid; and the stabilizer is antioxidant 1010.

[0025] The preparation method of the filler of this embodiment is: The boron nitride is immersed in a modification liquid of 2-3 times the total amount of the boron nitride, and the modification liquid is stirred and treated. After the stirring is completed, the boron nitride is filtered and dried to obtain a filler; The modified liquid includes the following raw materials in parts by weight: 1-3 parts of nano-attapulgite, 2-4 parts of nano-titanium dioxide, 3-5 parts of yttrium nitrate solution and 2-3 parts of urea.

[0026] The mass fraction of the yttrium nitrate solution in this embodiment is 2-5%; the stirring speed of the stirring modification treatment is 450-550r / min, and the stirring is for 1h.

[0027] Example 1. A method for producing a bamboo-plastic composite material in this embodiment comprises the following steps: Step 1: Recover the PE material, grind the PE material to 30 meshes, take 50 parts by weight of the ground PE material, 10 parts by weight of modified bamboo fiber and 4 parts by weight of additives and mix them evenly to obtain a mixed material; Step 2: Extrude the mixture through a twin-screw extruder and cut it into granules, control the aspect ratio of the extruder to be 40:1, the extruder head temperature to be 150° C., and the screw speed to be 120 r / min, to obtain a bamboo-plastic composite material.

[0028] The preparation method of the modified bamboo fiber of this embodiment is: S01: pre-conditioning the bamboo fiber to obtain pre-conditioned bamboo fiber; The specific pre-adjustment method is: The bamboo fiber is firstly treated with proton irradiation at an irradiation power of 350 W for 10 minutes, and then immersed in a sufficient amount of silane coupling agent liquid and stirred evenly to obtain a bamboo fiber liquid; S02: 2 parts of nano silicon dioxide, 1 part of nano silica sol, and 2 parts of fly ash are mixed and added into 5 parts of sodium dodecylbenzene sulfonate solution and stirred thoroughly to obtain a modified solution; S03: immersing the silicon carbide whisker into a sufficient amount of sodium silicate solution and stirring sufficiently, then filtering and drying to obtain a silicon carbide whisker agent; S04: The bamboo fiber liquid, the modified liquid and the silicon carbide whisker agent are mixed and ball-milled in a weight ratio of 5:3:2. After the ball-milling is completed, the mixture is filtered and dried to obtain the modified bamboo fiber.

[0029] The silane coupling agent liquid of this embodiment is prepared by mixing silane coupling agent, water and ethanol in a weight ratio of 2:1:5, with a mixing temperature of 50° C., a mixing time of 20 min and a mixing speed of 450 r / min.

[0030] The silane coupling agent of this embodiment is silane coupling agent KH550.

[0031] The mass fraction of the sodium dodecylbenzene sulfonate solution in this embodiment is 2%; the mass fraction of the sodium silicate solution is 3%.

[0032] The ball milling speed of the mixing ball milling process in this embodiment is 750 r / min, and the ball milling time is 20 min.

[0033] The auxiliary agent of this embodiment comprises the following raw materials in parts by weight: 2 parts of silane coupling agent, 1 part of lubricant, 3 parts of filler and 1 part of stabilizer.

[0034] The silane coupling agent of this embodiment is silane coupling agent KH560; the lubricant is stearic acid; and the stabilizer is antioxidant 1010.

[0035] The preparation method of the filler of this embodiment is: The boron nitride is immersed in a modification liquid twice the total amount of the boron nitride and stirred for modification treatment. After the stirring is completed, the mixture is filtered and dried to obtain a filler; The modified liquid includes the following raw materials in parts by weight: 1 part of nano-attapulgite, 2 parts of nano-titanium dioxide, 3 parts of yttrium nitrate solution and 2 parts of urea.

[0036] The mass fraction of the yttrium nitrate solution in this embodiment is 2%; the stirring speed of the stirring modification treatment is 450 r / min, and the stirring is for 1 hour.

[0037] Example 2. A method for producing a bamboo-plastic composite material in this embodiment comprises the following steps: Step 1: Recover the PE material, grind the PE material to 30 mesh, take 55 parts by weight of the ground PE material, 15 parts of modified bamboo fiber and 7 parts of additives and mix them evenly to obtain a mixed material; Step 2: Extrude the mixture through a twin-screw extruder and cut it into granules, control the aspect ratio of the extruder to 40:1, the extruder head temperature to 165°C, and the screw speed to 120r / min to obtain a bamboo-plastic composite material.

[0038] The preparation method of the modified bamboo fiber of this embodiment is: S01: pre-conditioning the bamboo fiber to obtain pre-conditioned bamboo fiber; The specific pre-adjustment method is: The bamboo fiber is firstly treated with proton irradiation at a power of 400 W for 15 minutes, and then immersed in a sufficient amount of silane coupling agent solution and stirred evenly to obtain a bamboo fiber solution; S02: 4 parts of nano silicon dioxide, 3 parts of nano silica sol, and 5 parts of fly ash are mixed and added into 8 parts of sodium dodecylbenzene sulfonate solution and stirred thoroughly to obtain a modified solution; S03: immersing the silicon carbide whisker into a sufficient amount of sodium silicate solution and stirring sufficiently, then filtering and drying to obtain a silicon carbide whisker agent; S04: The bamboo fiber liquid, the modified liquid and the silicon carbide whisker agent are mixed and ball-milled in a weight ratio of 5:3:2. After the ball-milling is completed, the mixture is filtered and dried to obtain the modified bamboo fiber.

[0039] The silane coupling agent liquid of this embodiment is prepared by mixing silane coupling agent, water and ethanol in a weight ratio of 2:1:5, with a mixing temperature of 55° C., a mixing time of 20 min and a mixing speed of 450 r / min.

[0040] The silane coupling agent of this embodiment is silane coupling agent KH550.

[0041] The mass fraction of the sodium dodecylbenzene sulfonate solution in this embodiment is 5%; the mass fraction of the sodium silicate solution is 6%.

[0042] The ball milling speed of the mixing ball milling process in this embodiment is 950 r / min, and the ball milling time is 30 min.

[0043] The auxiliary agent of this embodiment comprises the following raw materials in parts by weight: 5 parts of silane coupling agent, 3 parts of lubricant, 5 parts of filler and 2 parts of stabilizer.

[0044] The silane coupling agent of this embodiment is silane coupling agent KH560; the lubricant is stearic acid; and the stabilizer is antioxidant 1010.

[0045] The preparation method of the filler of this embodiment is: The boron nitride is immersed in a modification liquid of 3 times the total amount of the boron nitride and stirred for modification treatment. After the stirring is completed, the mixture is filtered and dried to obtain a filler; The modified liquid includes the following raw materials in parts by weight: 3 parts of nano-attapulgite, 4 parts of nano-titanium dioxide, 5 parts of yttrium nitrate solution and 3 parts of urea.

[0046] The mass fraction of the yttrium nitrate solution in this embodiment is 5%; the stirring speed of the stirring modification treatment is 550 r / min, and the stirring is for 1 hour.

[0047] Example 3. A method for producing a bamboo-plastic composite material in this embodiment comprises the following steps: Step 1: Recover the PE material, grind the PE material to 30 mesh, take 52.5 parts by weight of the ground PE material, 12.5 parts by weight of modified bamboo fiber and 5.5 parts by weight of additives and mix them evenly to obtain a mixed material; Step 2: Extrude the mixture through a twin-screw extruder and cut it into granules, control the aspect ratio of the extruder to 40:1, the extruder head temperature to 160°C, and the screw speed to 120r / min to obtain a bamboo-plastic composite material.

[0048] The preparation method of the modified bamboo fiber of this embodiment is: S01: pre-conditioning the bamboo fiber to obtain pre-conditioned bamboo fiber; The specific pre-adjustment method is: The bamboo fiber is first treated with proton irradiation at an irradiation power of 375 W for 12.5 min, and then immersed in a sufficient amount of silane coupling agent solution and stirred evenly to obtain a bamboo fiber solution; S02: 3 parts of nano silicon dioxide, 2 parts of nano silica sol, and 3.5 parts of fly ash are mixed and added into 6.5 parts of sodium dodecylbenzene sulfonate solution and stirred thoroughly to obtain a modified solution; S03: immersing the silicon carbide whisker into a sufficient amount of sodium silicate solution and stirring sufficiently, then filtering and drying to obtain a silicon carbide whisker agent; S04: The bamboo fiber liquid, the modified liquid and the silicon carbide whisker agent are mixed and ball-milled in a weight ratio of 5:3:2. After the ball-milling is completed, the mixture is filtered and dried to obtain the modified bamboo fiber.

[0049] The silane coupling agent liquid of this embodiment is prepared by mixing silane coupling agent, water and ethanol in a weight ratio of 2:1:5, with a mixing temperature of 52.5° C., a mixing time of 20 min and a mixing speed of 450 r / min.

[0050] The silane coupling agent of this embodiment is silane coupling agent KH550.

[0051] The mass fraction of the sodium dodecylbenzene sulfonate solution in this embodiment is 3.5%; the mass fraction of the sodium silicate solution is 4.5%.

[0052] The ball milling speed of the mixing ball milling process in this embodiment is 800 r / min, and the ball milling time is 25 min.

[0053] The auxiliary agent of this embodiment comprises the following raw materials in parts by weight: 3.5 parts of silane coupling agent, 2 parts of lubricant, 4 parts of filler and 1.5 parts of stabilizer.

[0054] The silane coupling agent of this embodiment is silane coupling agent KH560; the lubricant is stearic acid; and the stabilizer is antioxidant 1010.

[0055] The preparation method of the filler of this embodiment is: The boron nitride is immersed in a modification liquid of 2.5 times the total amount of the boron nitride, and the modification liquid is stirred and treated. After the stirring is completed, the boron nitride is filtered and dried to obtain a filler; The modified liquid includes the following raw materials in parts by weight: 2 parts of nano-attapulgite, 3 parts of nano-titanium dioxide, 4 parts of yttrium nitrate solution and 2.5 parts of urea.

[0056] The mass fraction of the yttrium nitrate solution in this embodiment is 3.5%; the stirring speed of the stirring modification treatment is 500 r / min, and the stirring is for 1 hour.

[0057] Example 4. A method for producing a bamboo-plastic composite material in this embodiment comprises the following steps: Step 1: Recover the PE material, grind the PE material to 30 mesh, take 52 parts by weight of the ground PE material, 12 parts of modified bamboo fiber and 5 parts of additives and mix them evenly to obtain a mixed material; Step 2: Extrude the mixture through a twin-screw extruder and cut it into granules, control the aspect ratio of the extruder to be 40:1, the extruder head temperature to be 155°C, and the screw speed to be 120r / min, to obtain a bamboo-plastic composite material.

[0058] The preparation method of the modified bamboo fiber of this embodiment is: S01: pre-conditioning the bamboo fiber to obtain pre-conditioned bamboo fiber; The specific pre-adjustment method is: The bamboo fiber is first treated with proton irradiation at an irradiation power of 360 W for 12 minutes, and then immersed in a sufficient amount of silane coupling agent solution and stirred evenly to obtain a bamboo fiber solution; S02: 3 parts of nano silicon dioxide, 2 parts of nano silica sol, and 3 parts of fly ash are mixed and added into 6 parts of sodium dodecylbenzene sulfonate solution and stirred thoroughly to obtain a modified solution; S03: immersing the silicon carbide whisker into a sufficient amount of sodium silicate solution and stirring sufficiently, then filtering and drying to obtain a silicon carbide whisker agent; S04: The bamboo fiber liquid, the modified liquid and the silicon carbide whisker agent are mixed and ball-milled in a weight ratio of 5:3:2. After the ball-milling is completed, the mixture is filtered and dried to obtain the modified bamboo fiber.

[0059] The silane coupling agent liquid of this embodiment is prepared by mixing silane coupling agent, water and ethanol in a weight ratio of 2:1:5, with a mixing temperature of 52° C., a mixing time of 20 min and a mixing speed of 450 r / min.

[0060] The silane coupling agent of this embodiment is silane coupling agent KH550.

[0061] The mass fraction of the sodium dodecylbenzene sulfonate solution in this embodiment is 3%; the mass fraction of the sodium silicate solution is 4%.

[0062] The ball milling speed of the mixing ball milling process in this embodiment is 780 r / min, and the ball milling time is 22 min.

[0063] The auxiliary agent of this embodiment comprises the following raw materials in parts by weight: 3 parts of silane coupling agent, 2 parts of lubricant, 4 parts of filler and 1.2 parts of stabilizer.

[0064] The silane coupling agent of this embodiment is silane coupling agent KH560; the lubricant is stearic acid; and the stabilizer is antioxidant 1010.

[0065] The preparation method of the filler of this embodiment is: The boron nitride is immersed in a modification liquid twice the total amount of the boron nitride and stirred for modification treatment. After the stirring is completed, the mixture is filtered and dried to obtain a filler; The modified liquid includes the following raw materials in parts by weight: 2 parts of nano-attapulgite, 3 parts of nano-titanium dioxide, 4 parts of yttrium nitrate solution and 2 parts of urea.

[0066] The mass fraction of the yttrium nitrate solution in this embodiment is 3%; the stirring speed of the stirring modification treatment is 460r / min, and the stirring is for 1h.

[0067] Example 5. A method for producing a bamboo-plastic composite material in this embodiment comprises the following steps: Step 1: Recover the PE material, grind the PE material to 30 meshes, take 54 parts by weight of the ground PE material, 14 parts of modified bamboo fiber and 6 parts of additives and mix them evenly to obtain a mixed material; Step 2: Extrude the mixture through a twin-screw extruder and cut it into granules, control the aspect ratio of the extruder to 40:1, the extruder head temperature to 162°C, and the screw speed to 120r / min to obtain a bamboo-plastic composite material.

[0068] The preparation method of the modified bamboo fiber of this embodiment is: S01: pre-conditioning the bamboo fiber to obtain pre-conditioned bamboo fiber; The specific pre-adjustment method is: The bamboo fiber is first treated with proton irradiation at an irradiation power of 385 W for 14 minutes, and then immersed in a sufficient amount of silane coupling agent solution and stirred evenly to obtain a bamboo fiber solution; S02: 3 parts of nano silicon dioxide, 2 parts of nano silica sol and 3 parts of fly ash are mixed and added into 7 parts of sodium dodecylbenzene sulfonate solution and stirred thoroughly to obtain a modified solution; S03: immersing the silicon carbide whisker into a sufficient amount of sodium silicate solution and stirring sufficiently, then filtering and drying to obtain a silicon carbide whisker agent; S04: The bamboo fiber liquid, the modified liquid and the silicon carbide whisker agent are mixed and ball-milled in a weight ratio of 5:3:2. After the ball-milling is completed, the mixture is filtered and dried to obtain the modified bamboo fiber.

[0069] The silane coupling agent liquid of this embodiment is prepared by mixing silane coupling agent, water and ethanol in a weight ratio of 2:1:5, with a mixing temperature of 52° C., a mixing time of 20 min and a mixing speed of 450 r / min.

[0070] The silane coupling agent of this embodiment is silane coupling agent KH550.

[0071] The mass fraction of the sodium dodecylbenzene sulfonate solution in this embodiment is 4%; the mass fraction of the sodium silicate solution is 5%.

[0072] The ball milling speed of the mixing ball milling process in this embodiment is 920 r / min, and the ball milling time is 28 min.

[0073] The auxiliary agent of this embodiment comprises the following raw materials in parts by weight: 4 parts of silane coupling agent, 2 parts of lubricant, 4 parts of filler and 2 parts of stabilizer.

[0074] The silane coupling agent of this embodiment is silane coupling agent KH560; the lubricant is stearic acid; and the stabilizer is antioxidant 1010.

[0075] The preparation method of the filler of this embodiment is: The boron nitride is immersed in a modification liquid of 3 times the total amount of the boron nitride and stirred for modification treatment. After the stirring is completed, the mixture is filtered and dried to obtain a filler; The modified liquid includes the following raw materials in parts by weight: 2 parts of nano-attapulgite, 3 parts of nano-titanium dioxide, 4 parts of yttrium nitrate solution and 3 parts of urea.

[0076] The mass fraction of the yttrium nitrate solution in this embodiment is 4%; the stirring speed of the stirring modification treatment is 540 r / min, and the stirring is for 1 hour.

[0077] Comparative Example 1. The difference from Example 3 is that the modified bamboo fiber is directly replaced by the bamboo fiber raw material.

[0078] Comparative Example 2. The difference from Example 3 is that no modifying liquid is added in the preparation of the modified bamboo fiber.

[0079] Comparative Example 3. The difference from Example 3 is that no nano silicon dioxide and fly ash are added to the modified liquid.

[0080] Comparative Example 4. The difference from Example 3 is that no silicon carbide whisker agent is added.

[0081] Comparative Example 5. The difference from Example 3 is that no filler is added to the auxiliary agent.

[0082] Comparative Example 6. The difference from Example 3 is that the filler is not treated with a modifying liquid.

[0083] Comparative Example 7. The difference from Example 3 is that no nano-attapulgite and nano-titanium dioxide are added to the modified liquid.

[0084] The product performances of Examples 1-5 and Comparative Examples 1-7 of the present invention were tested under conventional conditions, and placed in 5% hydrochloric acid mist conditions for 24 hours to test the acid corrosion resistance of the products. The test results are as follows.

[0085]

[0086] It can be seen from Examples 1-5 and Comparative Examples 1-7 that the products of Examples 1-5 of the present invention have excellent impact strength, excellent product wear rate effect, and excellent product performance stability under acid corrosion conditions; The performance of the modified bamboo fiber, which is directly substituted by bamboo fiber raw materials and does not add fillers to the additives, has a significant deterioration trend. The performance of the product is most significant when the two are combined. In the preparation of modified bamboo fiber, no modifying liquid was added, no nano-silicon dioxide and fly ash were added to the modifying liquid, no silicon carbide whisker agent was added, the filler was not treated with modifying liquid, and no nano-attapulgite and nano-titanium dioxide were added to the modifying liquid. The performance of the products showed a trend of deterioration. Only the modified bamboo fiber and filler obtained by the method of the present invention had the most significant product performance effect. Other methods were not as obvious as the effect of the present invention.

[0087] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0088] 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 producing a bamboo-plastic composite material, characterized in that: The following steps are involved: Step 1: Recover the PE material, grind the PE material to 30 mesh, take 50-55 parts by weight of the ground PE material, 10-15 parts of modified bamboo fiber and 4-7 parts of additives and mix them evenly to obtain a mixed material; Step 2: Extrude the mixed material through a twin-screw extruder and cut it into granules, control the aspect ratio of the extruder to be 40:1, the temperature of the extruder head to be 150-165° C., and the screw speed to be 120 r / min, to obtain a bamboo-plastic composite material.

2. The method for producing a bamboo-plastic composite material according to claim 1, characterized in that: The preparation method of the modified bamboo fiber is: S01: pre-conditioning the bamboo fiber to obtain pre-conditioned bamboo fiber; The specific pre-adjustment method is: The bamboo fiber is first treated with proton irradiation at a power of 350-400W for 10-15 minutes, and then immersed in a sufficient amount of silane coupling agent solution and stirred evenly to obtain a bamboo fiber solution; S02: 2-4 parts of nano silicon dioxide, 1-3 parts of nano silica sol, and 2-5 parts of fly ash are mixed and added into 5-8 parts of sodium dodecylbenzene sulfonate solution and stirred thoroughly to obtain a modified solution; S03: immersing the silicon carbide whisker into a sufficient amount of sodium silicate solution and stirring sufficiently, then filtering and drying to obtain a silicon carbide whisker agent; S04: The bamboo fiber liquid, the modified liquid and the silicon carbide whisker agent are mixed and ball-milled in a weight ratio of 5:3:

2. After the ball-milling is completed, the mixture is filtered and dried to obtain the modified bamboo fiber.

3. A method for producing a bamboo-plastic composite material according to claim 2, characterized in that: The silane coupling agent liquid is prepared by mixing silane coupling agent, water and ethanol in a weight ratio of 2:1:5, with a mixing temperature of 50-55° C., mixing for 20 minutes and a mixing speed of 450 r / min.

4. A method for producing a bamboo-plastic composite material according to claim 3, characterized in that: The silane coupling agent is silane coupling agent KH550.

5. The method for producing a bamboo-plastic composite material according to claim 2, characterized in that: The mass fraction of the sodium dodecylbenzene sulfonate solution is 2-5%; the mass fraction of the sodium silicate solution is 3-6%.

6. The method for producing a bamboo-plastic composite material according to claim 2, characterized in that: The ball milling speed of the mixing ball milling treatment is 750-950r / min, and the ball milling time is 20-30min.

7. The method for producing a bamboo-plastic composite material according to claim 1, characterized in that: The auxiliary agent comprises the following raw materials in parts by weight: 2-5 parts of silane coupling agent, 1-3 parts of lubricant, 3-5 parts of filler and 1-2 parts of stabilizer.

8. A method for producing a bamboo-plastic composite material according to claim 7, characterized in that: The silane coupling agent is silane coupling agent KH560; the lubricant is stearic acid; and the stabilizer is antioxidant 1010.

9. A method for producing a bamboo-plastic composite material according to claim 7, characterized in that: The preparation method of the filler is: The boron nitride is immersed in a modification liquid of 2-3 times the total amount of the boron nitride, and the modification liquid is stirred and treated. After the stirring is completed, the boron nitride is filtered and dried to obtain a filler; The modified liquid includes the following raw materials in parts by weight: 1-3 parts of nano-attapulgite, 2-4 parts of nano-titanium dioxide, 3-5 parts of yttrium nitrate solution and 2-3 parts of urea.

10. A method for producing a bamboo-plastic composite material according to claim 9, characterized in that: The mass fraction of the yttrium nitrate solution is 2-5%; the stirring speed of the stirring modification treatment is 450-550r / min, and the stirring is for 1h.

Images