A high-strength particleboard production process

Abstract

The invention discloses a high-strength particleboard production process, comprising the following steps: selecting raw materials: 30-40 parts of bamboo material, 25-35 parts of board material, 10-20 parts of nano-silver powder, 8-14 parts of a bidirectional improvement stabilizer, 30-35 parts of phenolic resin, 10-15 parts of an impregnating agent, 4-7 parts of a whisker regulating modifier, and 5-9 parts of calcium carbonate powder. The invention uses bamboo material and board material in combination with calcium carbonate powder and nano-silver powder to optimize the antibacterial effect of the product, then uses the bidirectional improvement stabilizer and the whisker regulating modifier to coordinately improve the performance effect of the product, coordinately improve the strength and antibacterial properties of the product, then optimizes the interface between the raw materials through the impregnating agent, and gels the raw materials with phenolic resin. After hot pressing, the product antibacterial performance and strength performance are coordinated and improved, and the product has a significant water resistance and stability effect.

Description

Technical Field

[0001] The invention relates to the technical field of particle boards, and in particular to a production process of high-strength particle boards. Background Art

[0002] Particleboard, also known as particle board, is a kind of artificial board made by cutting various branches, small-diameter wood, fast-growing wood, sawdust, etc. into pieces of a certain size, drying them, mixing them with glue, hardener, waterproofing agent, etc., and pressing them under a certain temperature and pressure.

[0003] Existing particleboards are mostly made of bamboo and wood raw materials combined with organic resin raw materials, which easily leads to poor interface between the raw materials, thereby deteriorating the strength performance of the product. At the same time, in order to increase the antibacterial properties of the board, antibacterial silver powder is added, but the raw materials agglomerate and the interface are poor, which in turn leads to further deterioration of the strength performance of the product. On this basis, it is currently difficult to achieve coordinated improvements in the antibacterial and strength properties of the product, as well as to solve the problem of water resistance of the product. Summary of the Invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a high-strength particleboard production process to solve the problems raised in the above background technology.

[0005] The present invention solves the technical problem by adopting the following technical solutions:

[0006] The present invention provides a high-strength particleboard production process, comprising the following steps:

[0007] Step 1, selection of raw materials: 30-40 parts of bamboo material, 25-35 parts of board material, 10-20 parts of nano silver powder, 8-14 parts of bidirectional improvement stabilizer, 30-35 parts of phenolic resin, 10-15 parts of impregnating agent, 4-7 parts of whisker regulating modifier, 5-9 parts of calcium carbonate powder;

[0008] Step 2: Preparation of the immersion agent:

[0009] Thoroughly mix 1-3 parts of silane coupling agent KH560, 2-5 parts of yttrium nitrate solution and 5-10 parts of sodium dodecylbenzenesulfonate solution to obtain an impregnating agent;

[0010] Step 3: adding the bidirectional improved stabilizer, nano silver powder, whisker regulating modifier and calcium carbonate powder in step 1 to the immersion agent, stirring and mixing, and then filtering and drying to obtain an immersion-treated composite agent;

[0011] Step 4: Mix the immersion-treated composite agent and phenolic resin thoroughly, and finally add the board material and bamboo material and continue to mix thoroughly to obtain a standby material;

[0012] Step five: feeding the prepared material into a mold for hot pressing and forming, and obtaining the high-strength particleboard of the present invention after the hot pressing is completed.

[0013] Preferably, the mass fraction of the yttrium nitrate solution is 2-5%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 10-15%.

[0014] Preferably, the preparation method of the bidirectional improved stabilizer is:

[0015] S01: Wollastonite is added to a sodium silicate solution with a mass fraction of 10% and a content of 3-5 times the total amount of wollastonite for ultrasonic dispersion treatment. After ultrasonic dispersion is completed, the solution is filtered and dried to obtain a wollastonite agent;

[0016] S02: adding 2-5 parts of wollastonite agent, 1-4 parts of sodium lignin sulfonate and 0.45-0.55 parts of phosphate buffer solution with a pH value of 5.0 to 15-20 parts of 10% sodium citrate solution and mixing thoroughly to obtain a wollastonite regulator;

[0017] S03: The wollastonite regulator and the modified graphene agent are mixed in a weight ratio of 2:5 and ball-milled at a ball-milling speed of 1000-1500 r / min for 1-2 hours. After the ball-milling is completed, the mixture is washed with water and dried to obtain a bidirectional improved stabilizer.

[0018] Preferably, the ultrasonic power of the ultrasonic dispersion treatment is 300-350W, and the ultrasonic time is 1-2h.

[0019] Preferably, the preparation method of the modified graphene agent is:

[0020] The graphene is heated to 140-150°C for 5-10 minutes, and then cooled to 50°C at a rate of 1-3°C / min to obtain a thermal graphene agent;

[0021] Add 3-5 parts of thermal graphene agent, 1-3 parts of zinc sulfate solution, and 0.45-0.65 parts of nano-silica sol to 10-15 parts of chitosan solution and stir. After stirring, wash with water and dry to obtain a modified graphene agent;

[0022] Preferably, the mass fraction of the zinc sulfate solution is 2-4%; the mass fraction of the chitosan solution is 5-8%.

[0023] Preferably, the stirring time of the stirring treatment is 1-2 hours, and the stirring speed is 450-550 r / min.

[0024] Preferably, the preparation method of the whisker regulating modifier is:

[0025] S101: placing the silicon carbide whiskers in a 5% hydrochloric acid solution with a mass fraction of 3-5 times the total amount of the silicon carbide whiskers, stirring evenly, washing with water, drying, and then preheating at 55-60° C. for 10-20 minutes and keeping warm;

[0026] S102: Then, 2-5% of carboxymethyl cellulose, 1-4% of stearic acid and 15-20% of doped nano-titanium dioxide liquid of the total amount of the S101 product are added to the S101 product, and the mixture is ball-milled at a speed of 1100-1200 r / min for 1-2 hours. After the ball milling is completed, the mixture is washed with water and dried to obtain a whisker regulating modifier.

[0027] Preferably, the doped nano-titanium dioxide solution is a mixture of nano-titanium dioxide and 5% by mass lanthanum chloride solution in a weight ratio of 2:5.

[0028] Preferably, the hot pressing pressure of the hot pressing molding is 10-15 MPa, the hot pressing time is 1-2 hours, and the hot pressing temperature is 45-50°C.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention uses bamboo material and board material in combination with calcium carbonate powder and nano silver powder to optimize the antibacterial effect of the product, and then uses a two-way improvement stabilizer and a whisker adjustment modifier to cooperate with each other to jointly enhance the performance effect of the product, coordinately improve the strength and antibacterial property of the product, and then optimize the interface between the raw materials through the use of an impregnating agent. The silane coupling agent KH560, yttrium nitrate solution and sodium dodecylbenzene sulfonate solution in the impregnating agent are mutually formulated and synergistically enhanced to enhance the interface performance of the system raw materials. The raw materials are gelled with phenolic resin, and the product is obtained through hot pressing. The antibacterial performance and strength performance are coordinated and improved, and the water resistance and stability of the product are significant; the bidirectional improved stabilizer adopts wollastonite to be ultrasonically treated with sodium silicate solution, and adopts sodium silicate-coated wollastonite as a needle-shaped point structure, which can be more stably distributed in the system. Sodium lignin sulfonate, phosphate buffer solution and sodium citrate solution are used to reconcile and improve each other. The obtained wollastonite regulator and modified graphene can be better coordinated, thereby coordinating and optimizing the performance effect of the product system in the distribution system; modified graphene adopts graphene to be ultrasonically treated with sodium silicate solution for 140- Heat treatment at 150℃ for 5-10min, then cooling to 50℃ at a rate of 1-3℃ / min to improve the activity of graphene, then blending with zinc sulfate solution, nano-silica sol and chitosan solution, and then ball milling with wollastonite regulator to improve. Through the mutual coordination between the raw materials, the flake graphene carries the needle-shaped point wollastonite distribution system, which enhances the strength performance of the product, coordinates and improves the antibacterial effect of the product, and improves the water resistance of the product. The addition of whisker regulating modifier can be combined with the two-way improvement stabilizer. One-step coordination and synergy: silicon carbide whiskers are treated with hydrochloric acid solution and then preheated at 55-60℃ for 10-20min to optimize the dispersion and activity of the whiskers. They are then coordinated and ball-milled with carboxymethyl cellulose, stearic acid and doped nano-titanium dioxide liquid. The doped nano-titanium dioxide liquid distribution system coordinated with nano-titanium dioxide and lanthanum chloride solution can better synergize the whisker regulating modifier with the two-way improved stabilizer, while optimizing the antibacterial performance of the product, enhancing the strength of the system, antibacterial coordination, and the water resistance of the product. DETAILED DESCRIPTION

[0031] 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 making creative efforts are within the scope of protection of the present invention.

[0032] A high-strength particleboard production process of this embodiment includes the following steps:

[0033] Step 1, selection of raw materials: 30-40 parts of bamboo material, 25-35 parts of board material, 10-20 parts of nano silver powder, 8-14 parts of bidirectional improvement stabilizer, 30-35 parts of phenolic resin, 10-15 parts of impregnating agent, 4-7 parts of whisker regulating modifier, 5-9 parts of calcium carbonate powder;

[0034] Step 2: Preparation of the immersion agent:

[0035] Thoroughly mix 1-3 parts of silane coupling agent KH560, 2-5 parts of yttrium nitrate solution and 5-10 parts of sodium dodecylbenzenesulfonate solution to obtain an impregnating agent;

[0036] Step 3: adding the bidirectional improved stabilizer, nano silver powder, whisker regulating modifier and calcium carbonate powder in step 1 to the immersion agent, stirring and mixing, and then filtering and drying to obtain an immersion-treated composite agent;

[0037] Step 4: Mix the immersion-treated composite agent and phenolic resin thoroughly, and finally add the board material and bamboo material and continue to mix thoroughly to obtain a standby material;

[0038] Step five: feeding the prepared material into a mold for hot pressing and forming, and obtaining the high-strength particleboard of the present invention after the hot pressing is completed.

[0039] The mass fraction of the yttrium nitrate solution in this embodiment is 2-5%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 10-15%.

[0040] The preparation method of the bidirectional improved stabilizer of this embodiment is:

[0041] S01: Wollastonite is added to a sodium silicate solution with a mass fraction of 10% and a content of 3-5 times the total amount of wollastonite for ultrasonic dispersion treatment. After ultrasonic dispersion is completed, the solution is filtered and dried to obtain a wollastonite agent;

[0042] S02: adding 2-5 parts of wollastonite agent, 1-4 parts of sodium lignin sulfonate and 0.45-0.55 parts of phosphate buffer solution with a pH value of 5.0 to 15-20 parts of 10% sodium citrate solution and mixing thoroughly to obtain a wollastonite regulator;

[0043] S03: The wollastonite regulator and the modified graphene agent are mixed in a weight ratio of 2:5 and ball-milled at a ball-milling speed of 1000-1500 r / min for 1-2 hours. After the ball-milling is completed, the mixture is washed with water and dried to obtain a bidirectional improved stabilizer.

[0044] The ultrasonic power of the ultrasonic dispersion treatment in this embodiment is 300-350W, and the ultrasonic time is 1-2h.

[0045] The preparation method of the modified graphene agent of this embodiment is:

[0046] The graphene is heated to 140-150°C for 5-10 minutes, and then cooled to 50°C at a rate of 1-3°C / min to obtain a thermal graphene agent;

[0047] Add 3-5 parts of thermal graphene agent, 1-3 parts of zinc sulfate solution, and 0.45-0.65 parts of nano-silica sol to 10-15 parts of chitosan solution and stir. After stirring, wash with water and dry to obtain a modified graphene agent;

[0048] The mass fraction of the zinc sulfate solution in this embodiment is 2-4%; the mass fraction of the chitosan solution is 5-8%.

[0049] The stirring time of the stirring process in this embodiment is 1-2 hours, and the stirring speed is 450-550 r / min.

[0050] The preparation method of the whisker regulating modifier of this embodiment is:

[0051] S101: placing the silicon carbide whiskers in a 5% hydrochloric acid solution with a mass fraction of 3-5 times the total amount of the silicon carbide whiskers, stirring evenly, washing with water, drying, and then preheating at 55-60° C. for 10-20 minutes and keeping warm;

[0052] S102: Then, 2-5% of carboxymethyl cellulose, 1-4% of stearic acid and 15-20% of doped nano-titanium dioxide liquid of the total amount of the S101 product are added to the S101 product, and the mixture is ball-milled at a speed of 1100-1200 r / min for 1-2 hours. After the ball milling is completed, the mixture is washed with water and dried to obtain a whisker regulating modifier.

[0053] The doped nano-titanium dioxide solution of this embodiment is prepared by mixing nano-titanium dioxide and 5% by mass lanthanum chloride solution in a weight ratio of 2:5.

[0054] The hot pressing pressure of the hot pressing molding in this embodiment is 10-15 MPa, the hot pressing time is 1-2 hours, and the hot pressing temperature is 45-50°C.

[0055] Example 1.

[0056] A high-strength particleboard production process of this embodiment includes the following steps:

[0057] Step 1, selection of raw materials: 30 parts of bamboo material, 25 parts of board material, 10 parts of nano silver powder, 8 parts of bidirectional improvement stabilizer, 30 parts of phenolic resin, 10 parts of impregnating agent, 4 parts of whisker regulating modifier, and 5 parts of calcium carbonate powder;

[0058] Step 2: Preparation of the immersion agent:

[0059] Thoroughly mix 1 part of silane coupling agent KH560, 2 parts of yttrium nitrate solution, and 5 parts of sodium dodecylbenzenesulfonate solution to obtain an impregnating agent;

[0060] Step 3: adding the bidirectional improved stabilizer, nano silver powder, whisker regulating modifier and calcium carbonate powder in step 1 to the immersion agent, stirring and mixing, and then filtering and drying to obtain an immersion-treated composite agent;

[0061] Step 4: Mix the immersion-treated composite agent and phenolic resin thoroughly, and finally add the board material and bamboo material and continue to mix thoroughly to obtain a standby material;

[0062] Step five: feeding the prepared material into a mold for hot pressing and forming, and obtaining the high-strength particleboard of the present invention after the hot pressing is completed.

[0063] The mass fraction of the yttrium nitrate solution in this embodiment is 2%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 10%.

[0064] The preparation method of the bidirectional improved stabilizer of this embodiment is:

[0065] S01: Wollastonite is added to a sodium silicate solution with a mass fraction of 10% and a content of 3 times the total amount of wollastonite for ultrasonic dispersion treatment. After the ultrasonic treatment is completed, the solution is filtered and dried to obtain a wollastonite agent;

[0066] S02: adding 2 parts of wollastonite agent, 1 part of sodium lignin sulfonate and 0.45 parts of phosphate buffer solution with a pH value of 5.0 to 15 parts of 10% sodium citrate solution and mixing thoroughly to obtain a wollastonite regulator;

[0067] S03: The wollastonite regulator and the modified graphene agent were mixed and ball-milled in a weight ratio of 2:5 at a ball-milling speed of 1000 r / min for 1 h. After the ball-milling was completed, the mixture was washed with water and dried to obtain a bidirectional improved stabilizer.

[0068] The ultrasonic power of the ultrasonic dispersion treatment in this embodiment is 300 W, and the ultrasonic time is 1 hour.

[0069] The preparation method of the modified graphene agent of this embodiment is:

[0070] The graphene was heated at 140°C for 5 min and then cooled to 50°C at a rate of 1°C / min to obtain a thermal graphene agent;

[0071] 3 parts of thermal graphene agent, 1 part of zinc sulfate solution, and 0.45 parts of nano-silica sol are added to 10 parts of chitosan solution and stirred. After stirring, the mixture is washed with water and dried to obtain a modified graphene agent;

[0072] The mass fraction of the zinc sulfate solution in this embodiment is 2%; the mass fraction of the chitosan solution is 5%.

[0073] The stirring time of the stirring process in this embodiment is 1 hour, and the stirring speed is 450 r / min.

[0074] The preparation method of the whisker regulating modifier of this embodiment is:

[0075] S101: placing the silicon carbide whiskers in a 5% hydrochloric acid solution with a mass fraction of 3 times the total amount of the silicon carbide whiskers, stirring evenly, washing with water, drying, and then preheating at 55°C for 10 minutes and keeping warm;

[0076] S102: Then, 2% of carboxymethyl cellulose, 1% of stearic acid and 15% of doped nano-titanium dioxide liquid of the total amount of the S101 product are added to the S101 product, and the mixture is ball-milled at a speed of 1100 r / min for 1 hour. After the ball milling is completed, the mixture is washed with water and dried to obtain a whisker regulating modifier.

[0077] The doped nano-titanium dioxide solution of this embodiment is prepared by mixing nano-titanium dioxide and 5% by mass lanthanum chloride solution in a weight ratio of 2:5.

[0078] The hot pressing pressure of the hot pressing molding in this embodiment is 10 MPa, the hot pressing time is 1 hour, and the hot pressing temperature is 45°C.

[0079] Example 2.

[0080] A high-strength particleboard production process of this embodiment includes the following steps:

[0081] Step 1, selection of raw materials: 40 parts of bamboo material, 35 parts of board material, 20 parts of nano silver powder, 14 parts of bidirectional improvement stabilizer, 35 parts of phenolic resin, 15 parts of impregnating agent, 7 parts of whisker regulating modifier, and 9 parts of calcium carbonate powder;

[0082] Step 2: Preparation of the immersion agent:

[0083] Thoroughly mix 3 parts of silane coupling agent KH560, 5 parts of yttrium nitrate solution, and 10 parts of sodium dodecylbenzenesulfonate solution to obtain an impregnating agent;

[0084] Step 3: adding the bidirectional improved stabilizer, nano silver powder, whisker regulating modifier and calcium carbonate powder in step 1 to the immersion agent, stirring and mixing, and then filtering and drying to obtain an immersion-treated composite agent;

[0085] Step 4: Mix the immersion-treated composite agent and phenolic resin thoroughly, and finally add the board material and bamboo material and continue to mix thoroughly to obtain a standby material;

[0086] Step five: feeding the prepared material into a mold for hot pressing and forming, and obtaining the high-strength particleboard of the present invention after the hot pressing is completed.

[0087] The mass fraction of the yttrium nitrate solution in this embodiment is 5%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 15%.

[0088] The preparation method of the bidirectional improved stabilizer of this embodiment is:

[0089] S01: Wollastonite is added to a sodium silicate solution with a mass fraction of 10% and a content of 5 times the total amount of wollastonite for ultrasonic dispersion treatment. After the ultrasonic treatment is completed, the solution is filtered and dried to obtain a wollastonite agent;

[0090] S02: adding 5 parts of wollastonite agent, 4 parts of sodium lignin sulfonate and 0.55 parts of phosphate buffer solution with a pH value of 5.0 to 20 parts of 10% sodium citrate solution and mixing thoroughly to obtain a wollastonite regulator;

[0091] S03: The wollastonite regulator and the modified graphene agent were mixed and ball-milled in a weight ratio of 2:5 at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling was completed, the mixture was washed with water and dried to obtain a bidirectional improved stabilizer.

[0092] The ultrasonic power of the ultrasonic dispersion treatment in this embodiment is 350W, and the ultrasonic time is 2 hours.

[0093] The preparation method of the modified graphene agent of this embodiment is:

[0094] The graphene was heated at 150°C for 10 min and then cooled to 50°C at a rate of 3°C / min to obtain a thermal graphene agent;

[0095] 5 parts of thermal graphene agent, 3 parts of zinc sulfate solution, and 0.65 parts of nano-silica sol are added to 15 parts of chitosan solution and stirred. After stirring, the mixture is washed with water and dried to obtain a modified graphene agent;

[0096] The mass fraction of the zinc sulfate solution in this embodiment is 4%; the mass fraction of the chitosan solution is 8%.

[0097] The stirring time of the stirring process in this embodiment is 2 hours, and the stirring speed is 550 r / min.

[0098] The preparation method of the whisker regulating modifier of this embodiment is:

[0099] S101: placing the silicon carbide whiskers in a 5% hydrochloric acid solution with a mass fraction of 5 times the total amount of the silicon carbide whiskers, stirring evenly, washing with water, drying, and then preheating at 60°C for 20 minutes and keeping warm;

[0100] S102: Then, 5% of carboxymethyl cellulose, 4% of stearic acid and 20% of doped nano-titanium dioxide liquid of the total amount of the S101 product are added to the S101 product, and the mixture is ball-milled at a speed of 1200 r / min for 2 hours. After the ball milling is completed, the mixture is washed with water and dried to obtain a whisker regulating modifier.

[0101] The doped nano-titanium dioxide solution of this embodiment is prepared by mixing nano-titanium dioxide and 5% by mass lanthanum chloride solution in a weight ratio of 2:5.

[0102] The hot pressing pressure of the hot pressing molding in this embodiment is 15 MPa, the hot pressing time is 2 hours, and the hot pressing temperature is 50°C.

[0103] Example 3.

[0104] A high-strength particleboard production process of this embodiment includes the following steps:

[0105] Step 1, selection of raw materials: 35 parts of bamboo material, 30 parts of board material, 15 parts of nano silver powder, 11 parts of bidirectional improvement stabilizer, 32.5 parts of phenolic resin, 12.5 parts of impregnating agent, 5.5 parts of whisker regulating modifier, and 7 parts of calcium carbonate powder;

[0106] Step 2: Preparation of the immersion agent:

[0107] Thoroughly mix 2 parts of silane coupling agent KH560, 3.5 parts of yttrium nitrate solution, and 7.5 parts of sodium dodecylbenzenesulfonate solution to obtain an impregnating agent;

[0108] Step 3: adding the bidirectional improved stabilizer, nano silver powder, whisker regulating modifier and calcium carbonate powder in step 1 to the immersion agent, stirring and mixing, and then filtering and drying to obtain an immersion-treated composite agent;

[0109] Step 4: Mix the immersion-treated composite agent and phenolic resin thoroughly, and finally add the board material and bamboo material and continue to mix thoroughly to obtain a standby material;

[0110] Step five: feeding the prepared material into a mold for hot pressing and forming, and obtaining the high-strength particleboard of the present invention after the hot pressing is completed.

[0111] The mass fraction of the yttrium nitrate solution in this embodiment is 3.5%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 12.5%.

[0112] The preparation method of the bidirectional improved stabilizer of this embodiment is:

[0113] S01: Wollastonite is added to a sodium silicate solution with a mass fraction of 10% and a content of 4 times the total amount of wollastonite for ultrasonic dispersion treatment. After the ultrasonic treatment is completed, the solution is filtered and dried to obtain a wollastonite agent;

[0114] S02: 3.5 parts of wollastonite agent, 2.5 parts of sodium lignin sulfonate and 0.50 parts of phosphate buffer solution with a pH value of 5.0 are added to 17.5 parts of 10% sodium citrate solution and mixed thoroughly to obtain a wollastonite regulator;

[0115] S03: The wollastonite regulator and the modified graphene agent were mixed and ball-milled in a weight ratio of 2:5 at a ball-milling speed of 1250 r / min for 1.5 h. After the ball-milling was completed, the mixture was washed with water and dried to obtain a bidirectional improved stabilizer.

[0116] The ultrasonic power of the ultrasonic dispersion treatment in this embodiment is 325W, and the ultrasonic time is 1.5h.

[0117] The preparation method of the modified graphene agent of this embodiment is:

[0118] The graphene was heated at 145°C for 7.5 min and then cooled to 50°C at a rate of 2°C / min to obtain a thermal graphene agent;

[0119] 4 parts of thermal graphene agent, 2 parts of zinc sulfate solution, and 0.50 parts of nano-silica sol are added to 12.5 parts of chitosan solution and stirred. After stirring, the mixture is washed with water and dried to obtain a modified graphene agent;

[0120] The mass fraction of the zinc sulfate solution in this embodiment is 3%; the mass fraction of the chitosan solution is 6.5%.

[0121] The stirring time of the stirring process in this embodiment is 1.5 hours, and the stirring speed is 500 r / min.

[0122] The preparation method of the whisker regulating modifier of this embodiment is:

[0123] S101: placing the silicon carbide whiskers in a 5% hydrochloric acid solution with a mass fraction of 4 times the total amount of the silicon carbide whiskers, stirring evenly, washing with water, drying, and then preheating at 57°C for 15 minutes and keeping warm;

[0124] S102: Then, 3.5% of carboxymethyl cellulose, 2.5% of stearic acid and 17.5% of doped nano-titanium dioxide liquid of the total amount of the S101 product are added to the S101 product, and the mixture is ball-milled at a speed of 1150 r / min for 1.5 h. After the ball milling is completed, the mixture is washed with water and dried to obtain a whisker regulating modifier.

[0125] The doped nano-titanium dioxide solution of this embodiment is prepared by mixing nano-titanium dioxide and 5% by mass lanthanum chloride solution in a weight ratio of 2:5.

[0126] The hot pressing pressure of the hot pressing molding in this embodiment is 12.5 MPa, the hot pressing time is 1.5 hours, and the hot pressing temperature is 47.5°C.

[0127] Comparative Example 1.

[0128] The difference from Example 3 is that no bidirectional improved stabilizer is added.

[0129] Comparative Example 2.

[0130] The difference from Example 3 is that wollastonite is used instead of wollastonite in the preparation of the bidirectional improved stabilizer.

[0131] Comparative Example 3.

[0132] The difference from Example 3 is that no wollastonite regulator is added in the preparation of the bidirectional improved stabilizer.

[0133] Comparative Example 4.

[0134] The difference from Example 3 is that sodium lignin sulfonate and phosphate buffer solution were not added in the preparation of the wollastonite conditioning agent.

[0135] Comparative Example 5.

[0136] The difference from Example 3 is that no modified graphene agent is added in the preparation of the bidirectional improved stabilizer.

[0137] Comparative Example 6.

[0138] The difference from Example 3 is that no whisker regulating modifier is added.

[0139] Comparative Example 7.

[0140] The difference from Example 3 is that step S101 is not used in the preparation of the whisker regulating modifier.

[0141] Comparative Example 8.

[0142] The difference from Example 3 is that carboxymethyl cellulose and stearic acid treatment are not used in the preparation of the whisker regulating modifier.

[0143] Comparative Example 9.

[0144] The difference from Example 3 is that deionized water is used instead of the doped nano-titanium dioxide liquid in the preparation of the whisker regulating modifier.

[0145] Comparative Example 10.

[0146] The difference from Example 3 is that no immersion agent treatment was used.

[0147] The products of Examples 1-3 and Comparative Examples 1-10 of the present invention were tested for impact strength and E. coli antibacterial rate, and the products were soaked in water for 6 hours and then taken out to test water resistance.

[0148]

[0149]

[0150] From Examples 1-3 and Comparative Examples 1-10, it can be seen that the impact strength and E. coli antibacterial rate of Example 3 of the present invention can achieve coordinated improvement, while the water resistance stability of the product is significant, and the performance effect of the product is obvious;

[0151] In addition, it can be seen from Comparative Examples 1-5 that without the addition of a bidirectional improved stabilizer, the impact strength and the antibacterial rate of Escherichia coli of the product are significantly reduced. In the preparation of the bidirectional improved stabilizer, the wollastonite agent is replaced by wollastonite, the wollastonite regulator is not added in the preparation of the bidirectional improved stabilizer, sodium lignin sulfonate and phosphate buffer solution are not added in the preparation of the wollastonite regulator, and the modified graphene agent is not added in the preparation of the bidirectional improved stabilizer. The performance of the product has a trend of deterioration. At the same time, the preparation of the bidirectional improved stabilizer without the addition of a modified graphene agent is more obvious in the preparation of the bidirectional improved stabilizer. The performance effects of the bidirectional improved stabilizers prepared by different methods all have a trend of deterioration. Only the bidirectional improved stabilizer prepared by the method of the present invention has the most significant performance effect of the product.

[0152] From Comparative Examples 6-10, Comparative Example 1 and Example 3, it can be seen that when the present invention does not add any of the following: bidirectional improvement stabilizer, whisker regulation modifier, or immersion agent treatment, the performance of the product has a significant deterioration trend. Only when the three are combined and work together, the performance effect of the product is most significant.

[0153] The performance of the products showed a trend of deterioration when the S101 step was not used in the preparation of the whisker regulating modifier, carboxymethyl cellulose and stearic acid were not used in the preparation of the whisker regulating modifier, and deionized water was used instead of the doped nano-titanium dioxide liquid in the preparation of the whisker regulating modifier. Only the whisker regulating modifier prepared by the method of the present invention had the most significant performance effect.

[0154] The preparation method of the modified graphene agent is:

[0155] The graphene was heated at 145°C for 7.5 min and then cooled to 50°C at a rate of 2°C / min to obtain a thermal graphene agent;

[0156] 4 parts of thermal graphene agent, 2 parts of zinc sulfate solution, and 0.50 parts of nano-silica sol are added to 12.5 parts of chitosan solution and stirred. After stirring, the mixture is washed with water and dried to obtain a modified graphene agent;

[0157] The mass fraction of the zinc sulfate solution in this embodiment is 3%; the mass fraction of the chitosan solution is 6.5%.

[0158] The present invention further explores the modified graphene agent and its impact on product performance.

[0159] Experimental Example 1.

[0160] The difference from Example 3 is that the preparation of the modified graphene agent does not adopt the heat treatment at 145°C for 7.5 minutes and then cooling to 50°C at a rate of 2°C / min.

[0161] Experimental Example 2.

[0162] The difference from Example 3 is that no nano-silica sol is added in the preparation of the modified graphene agent.

[0163] Experimental Example 3.

[0164] The difference from Example 3 is that no zinc sulfate solution is added in the preparation of the modified graphene agent.

[0165] Experimental Example 4.

[0166] The difference from Example 3 is that deionized water is used instead of chitosan solution in the preparation of the modified graphene agent.

[0167] The performance tests of product experimental examples 1-4 are as follows:

[0168]

[0169] It can be seen from Experimental Examples 1-4 that in the preparation of the modified graphene agent, the heat treatment at 145°C for 7.5min and then cooling to 50°C at a rate of 2°C / min was not used, nano-silica sol was not added, zinc sulfate solution was not added, and the chitosan solution was replaced by deionized water. The performance of the product showed a trend of deterioration. At the same time, it was found that the antibacterial properties of the product were greatly affected by the absence of zinc sulfate solution. The impact strength performance of the product was significantly affected by the absence of heat treatment at 145°C for 7.5min and then cooling to 50°C at a rate of 2°C / min. The modified graphene agent prepared by the method of the present invention had the most significant performance effect.

[0170] 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 invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0171] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method 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 can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A high-strength particleboard production process, characterized in that: The following steps are involved: Step 1, selection of raw materials: 30-40 parts of bamboo material, 25-35 parts of board material, 10-20 parts of nano silver powder, 8-14 parts of bidirectional improvement stabilizer, 30-35 parts of phenolic resin, 10-15 parts of impregnating agent, 4-7 parts of whisker regulating modifier, 5-9 parts of calcium carbonate powder; Step 2: Preparation of the immersion agent: Thoroughly mix 1-3 parts of silane coupling agent KH560, 2-5 parts of yttrium nitrate solution and 5-10 parts of sodium dodecylbenzenesulfonate solution to obtain an impregnating agent; Step 3: adding the bidirectional improved stabilizer, nano silver powder, whisker regulating modifier and calcium carbonate powder in step 1 to the immersion agent, stirring and mixing, and then filtering and drying to obtain an immersion-treated composite agent; Step 4: Mix the immersion-treated composite agent and phenolic resin thoroughly, and finally add the board material and bamboo material and continue to mix thoroughly to obtain a standby material; Step 5: feeding the prepared material into a mold for hot pressing and forming, and obtaining a high-strength particleboard after the hot pressing is completed; The preparation method of the bidirectional improved stabilizer is: S01: Wollastonite is added to a sodium silicate solution with a mass fraction of 10% and a content of 3-5 times the total amount of wollastonite for ultrasonic dispersion treatment. After the ultrasonic treatment is completed, the solution is filtered and dried to obtain a wollastonite agent; S02: adding 2-5 parts of wollastonite agent, 1-4 parts of sodium lignin sulfonate and 0.45-0.55 parts of phosphate buffer solution with a pH value of 5.0 to 15-20 parts of 10% by mass sodium citrate solution and mixing thoroughly to obtain a wollastonite regulator; S03: mixing the wollastonite regulator and the modified graphene agent in a weight ratio of 2:5 and ball milling the mixture at a speed of 1000-1500 r / min for 1-2 h. After the ball milling is completed, the mixture is washed with water and dried to obtain a bidirectional improved stabilizer; The preparation method of the modified graphene agent is: The graphene is heated to 140-150°C for 5-10 minutes, and then cooled to 50°C at a rate of 1-3°C / min to obtain a thermal graphene agent; 3-5 parts of thermal graphene agent, 1-3 parts of zinc sulfate solution, and 0.45-0.65 parts of nano-silica sol are added to 10-15 parts of chitosan solution and stirred. After stirring, the mixture is washed with water and dried to obtain a modified graphene agent.

2. A high-strength particleboard production process according to claim 1, characterized in that: The mass fraction of the yttrium nitrate solution is 2-5%; the mass fraction of the sodium dodecylbenzenesulfonate solution is 10-15%.

3. A high-strength particleboard production process according to claim 1, characterized in that: The ultrasonic power of the ultrasonic dispersion treatment is 300-350W, and the ultrasonic time is 1-2h.

4. A high-strength particleboard production process according to claim 1, characterized in that: The mass fraction of the zinc sulfate solution is 2-4%; the mass fraction of the chitosan solution is 5-8%.

5. A high-strength particleboard production process according to claim 1, characterized in that: The stirring time of the stirring treatment is 1-2 hours, and the stirring speed is 450-550 r / min.

6. A high-strength particleboard production process according to claim 1, characterized in that: The preparation method of the whisker regulating modifier is: S101: placing the silicon carbide whiskers in a 5% hydrochloric acid solution with a mass fraction of 3-5 times the total amount of the silicon carbide whiskers, stirring evenly, washing with water, drying, and then preheating at 55-60°C for 10-20 minutes and keeping warm; S102: Then, 2-5% of carboxymethyl cellulose, 1-4% of stearic acid and 15-20% of doped nano-titanium dioxide liquid of the total amount of the S101 product are added to the S101 product, and the mixture is ball-milled at a speed of 1100-1200 r / min for 1-2 hours. After the ball milling is completed, the mixture is washed with water and dried to obtain a whisker regulating modifier.

7. A high-strength particleboard production process according to claim 6, characterized in that: The doped nano-titanium dioxide solution is prepared by mixing nano-titanium dioxide and 5% by mass lanthanum chloride solution in a weight ratio of 2:

5.

8. A high-strength particleboard production process according to claim 1, characterized in that: The hot pressing pressure of the hot pressing molding is 10-15 MPa, the hot pressing time is 1-2 hours, and the hot pressing temperature is 45-50°C.

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