CN112662124A - Preparation method of novel environment-friendly bamboo charcoal board for decoration and product thereof - Google Patents
Preparation method of novel environment-friendly bamboo charcoal board for decoration and product thereof Download PDFInfo
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Abstract
The invention relates to a preparation method of a novel environment-friendly bamboo charcoal board for decoration and a product thereof, which take biomass nano-cellulose as a dispersant, uniformly disperse bamboo charcoal powder in an aqueous solution to form uniformly dispersed and stable bamboo charcoal powder/nano-cellulose mixed solution, freeze-dry the mixed solution to form a bamboo charcoal powder bulk material, then crush the bamboo charcoal powder bulk material into particles, then impregnate phenolic resin, dry the particles at low temperature and then hot-press the particles into bamboo charcoal boards with different densities. The bamboo charcoal board produced by the method has the characteristics of uniform density and stable mechanical property. The addition of the nano-cellulose can improve the bending strength and the elastic modulus of the bamboo charcoal board and solve the problems of larger brittleness and irrational mechanical property of the bamboo charcoal board. Meanwhile, the raw materials adopted by the invention are simple in components, and the used biomass nanocellulose can be completely degraded, so that the aim of environmental protection is really fulfilled. The production equipment of the invention can be produced by adopting a conventional multilayer artificial board hot press, and has the characteristics of high production efficiency and large yield.
Description
Technical Field
The invention relates to a preparation method of a novel environment-friendly bamboo charcoal board for decoration and a product thereof, belonging to the technical field of processing of bamboo wood-based boards.
Background
At present, the wood/bamboo artificial board is mainly used as a board for building and indoor decoration, the wood/bamboo unit material is made by high-temperature/high-pressure loading of phenolic aldehyde/urea-formaldehyde resin or other resins, and the prepared board has the texture of natural wood or bamboo, meets the strength and has certain aesthetic property. However, the dimensional stability of the plate is not ideal, and when the plate is particularly used as an outdoor building decoration material, the plate is easy to deform, crack, mildew, decay, discolor and the like in the continuous solarization of sunlight and the soaking process of rainwater.
The bamboo charcoal is a charcoal material formed by high-temperature pyrolysis of bamboo wood, and has the characteristics of loose and porous structure, fine and porous molecules, hard texture and the like. In building decoration, the bamboo charcoal is placed at the bottom layer or under the floor of a building, and has the effects of moisture prevention, mildew prevention, insect prevention and environment improvement. Because the bamboo charcoal has the function of automatic humidity adjustment and the effect is lasting, the method is far superior to the method of placing quicklime under the building commonly in China. The bamboo charcoal powder is used for the processing production of building coatings, and has a very wide prospect. With the improvement of the quality of life of residents, the bamboo charcoal special for the floor packaged by the bamboo charcoal particles is paved together with the wooden floor, and is advocated by people and the environment protection world. In the material industry, bamboo charcoal can be made into a part of novel composite materials, such as superfine bamboo charcoal cloth, bamboo charcoal ceramic porous bodies, powder molding composite materials, fillers capable of degrading plastics, feed additives and the like.
At present, the artificial board made of bamboo charcoal is also used in building materials, such as bamboo charcoal floors, door panels, and other decorative materials, and mainly utilizes the high porosity of bamboo charcoal to effectively reduce the pollutants of building residual materials and protect the space environment. The current preparation method of the bamboo charcoal board is mainly to mix bamboo charcoal powder, resin, other lubricants and stabilizers and then compress and extrude the mixture to form the bamboo charcoal board.
Disclosure of Invention
The invention provides a preparation method of a novel environment-friendly bamboo charcoal board for decoration and a product thereof, aiming at solving the problems of high cost, uneven density of the bamboo charcoal board caused by uneven dispersion of bamboo charcoal powder in resin and the like of the existing bamboo charcoal board.
The technical solution of the invention is as follows: a preparation method of a novel decorative bamboo charcoal board and a product thereof specifically comprise the following steps:
firstly, crushing the prepared bamboo charcoal into bamboo charcoal powder (the particle size is within the range of 10-50 mu m) with 300-1000 meshes;
secondly, dissolving the nano-cellulose in deionized water to form a nano-cellulose solution with a certain concentration by taking the biomass nano-cellulose as a dispersing agent, wherein the diameter grade of the nano-cellulose is 20-200;
thirdly, adding the prepared bamboo charcoal powder into the nano-cellulose solution according to a certain proportion, uniformly stirring for a certain time at normal temperature, and then carrying out ultrasonic dispersion treatment to prepare a bamboo charcoal powder/nano-cellulose solution with uniform and stable dispersion;
fourthly, concentrating the prepared bamboo charcoal powder/nano cellulose solution into a bamboo charcoal powder/nano cellulose gel state by adopting a rotary evaporator, taking out the bamboo charcoal powder/nano cellulose gel, and freeze-drying the bamboo charcoal powder/nano cellulose gel to form a blocky or flaky bamboo charcoal powder aerogel;
fifthly, the obtained bamboo charcoal powder aerogel is crushed again to prepare aerogel particles with the average particle size diameter of 3-5 mm;
sixthly, putting the obtained bamboo charcoal powder aerogel particles into a phenolic resin aqueous solution for soaking for a certain time, taking out the bamboo charcoal powder aerogel particles, airing the bamboo charcoal powder aerogel particles at normal temperature, and drying the bamboo charcoal powder aerogel particles at low temperature for a certain time to form the impregnated bamboo charcoal powder aerogel particles;
and (seventhly), weighing the impregnated bamboo charcoal powder particles according to the preset density of the bamboo charcoal board, then uniformly paving the bamboo charcoal powder particles in a hot-pressing board mould, and pressing the bamboo charcoal powder particles at high temperature and high pressure to prepare the novel decorative bamboo charcoal board.
The invention has the beneficial effects that:
1) the existing preparation method of bamboo charcoal board is mainly to mix bamboo charcoal powder with plastic particles (polystyrene, high density polyethylene, polyvinyl chloride and other resins), then add components such as stabilizer, PE wax, lubricating grease, foaming regulator and the like, compress and extrude to form. The method is mainly characterized in that a large amount of non-degradable plastics still exist in the product, the product does not have the characteristic of environmental protection, and meanwhile, carbon powder is difficult to uniformly disperse in the plastics, so that the problems of non-uniform density, non-ideal mechanical property of the product and the like of the product are caused. On the other hand, the product has more components, the process is difficult to control, and the production cost is high.
2) The invention mainly utilizes the dispersion function of the biomass nanocellulose to uniformly disperse micron-sized bamboo charcoal powder in an aqueous solution, can form uniform bamboo charcoal aerogel after shrinkage and freeze drying, and then prepares bamboo charcoal aerogel particles with uniform diameters, so that the finally-formed bamboo charcoal board has uniform density, and a bamboo charcoal board with uniform performance is formed.
3) According to the invention, on one hand, the dispersion stabilization effect of the biomass nanocellulose is utilized, on the other hand, the excellent mechanical property of the nanocellulose can improve the tensile strength and the elastic modulus of the bamboo charcoal board, and the problems of large brittleness and irrational mechanical property of the current bamboo charcoal board are solved.
4) The raw materials adopted by the invention have simple components, and the used biomass nano-cellulose can be completely degraded, thereby really achieving the purpose of environmental protection. The production equipment of the invention can be produced by adopting a conventional multilayer artificial board hot press, and has the characteristics of high production efficiency and large yield.
Detailed Description
A preparation method of a novel environment-friendly decorative bamboo charcoal board and a product thereof specifically comprise the following steps:
firstly, the moisture content of the prepared or purchased bamboo charcoal is 10-14 percent, and the fixed carbon content is 85-88 percent; the ash content is 2-4%; the specific surface area is 300-600 m/g; 6 to 8 percent of volatile component; the air dry density is more than or equal to 0.800g/cm3. Then the bamboo charcoal is crushed into bamboo charcoal powder (the particle size is within the range of 10-50 mu m) with 300 meshes-1000 meshes.
Secondly, dissolving the nano-cellulose in deionized water to form a nano-cellulose solution with a certain concentration by taking the biomass nano-cellulose as a dispersing agent, wherein the diameter grade of the nano-cellulose is 10-100;
using 80-100-mesh bamboo powder as a raw material, removing lignin and hemicellulose by adopting a chlorous acid solution with the concentration of 15-25% and a sodium hydroxide solution, then weighing 0.01g of TEMPO and 0.1g of NaBr by a TEMPO oxidation method, dissolving in 100m L deionized water, adding 1g of alpha-cellulose, continuously stirring until the alpha-cellulose is completely dissolved, slowly dripping 8mmol of sodium hypochlorite, respectively adjusting the pH to about 10 by using a dilute hydrochloric acid solution and a NaOH solution, reacting for 4 hours, adding 5ml of absolute ethyl alcohol to terminate the reaction, and washing with deionized water to be neutral. Taking 2mg/ml oxidized cellulose suspension, performing ultrasonic treatment for 30min under 600W power, then performing centrifugal treatment for 10min (speed 10000 r/min), collecting supernate in a centrifugal tube to obtain the nano cellulose suspension, and finally preparing the nano cellulose suspension with mass concentration of 0.2-0.5%.
Adding the bamboo charcoal powder into the nano-cellulose solution according to a certain proportion, wherein the mass ratio of the bamboo charcoal powder to the nano-cellulose is (3-8): 1. magnetically stirring for 4-6 hours at normal temperature, and then ultrasonically dispersing for 30-45 minutes at low temperature to obtain a bamboo charcoal powder/nano cellulose solution;
and (IV) carrying out rotary evaporation on the prepared bamboo charcoal powder/nano cellulose solution at the temperature of 60 ℃ for 12-18 hours by adopting a rotary evaporator, concentrating the solution into bamboo charcoal powder/nano cellulose gel, freezing the bamboo charcoal powder/nano cellulose gel at the temperature of-50 ℃ for 6-8 hours, taking out the bamboo charcoal powder/nano cellulose gel, and then drying the bamboo charcoal powder/nano cellulose gel in vacuum (3.5-6 Pa) to form a bamboo charcoal powder bulk material.
And (V) crushing the obtained bamboo charcoal powder block material again to prepare bamboo charcoal powder particles with the average particle size diameter of 3-5 mm.
And sixthly, putting the obtained bamboo charcoal powder particles into water-soluble phenolic resin (with the solid content of 30-40%) to be soaked for 30-60 minutes, taking out the bamboo charcoal powder particles, airing the bamboo charcoal powder particles for 12-24 hours at normal temperature, drying the bamboo charcoal powder particles for 4-12 hours at a low temperature of 50-80 ℃, and controlling the water content of the bamboo charcoal powder particles to be within a range of 10-16%.
(VII) passing through the preset bamboo charcoal board density (0.55-0.8 g/cm)3) Weighing the impregnated bamboo charcoal powder particles, uniformly paving the bamboo charcoal powder particles in a hot pressing plate mould (the size of the hot pressing plate is determined according to a conventional artificial board hot pressing machine), determining the rear thickness of the bamboo charcoal plate according to the specification of an actually required product, determining the hot pressing time according to the thickness of the product within the temperature range of 135-150 ℃ and the unit pressure within the range of 1.0-4.0 MPa, and finally cooling to 40-60 ℃ to unload the bamboo charcoal plate to obtain the required novel environment-friendly bamboo charcoal plate for decoration.
Example 1
According to the water content of 10%, the fixed carbon content of 85% -88%, the ash content of 2% -4%, the specific surface area of 400 m/g and the volatile component of 6% -8%; the air dry density is 0.800g/cm3The bamboo charcoal is purchased, dried to be absolutely dry and then crushed into 500-mesh bamboo charcoal powder.
Using 100-mesh bamboo powder as a raw material, removing lignin and hemicellulose by adopting 25% chlorous acid solution and sodium hydroxide solution, then, weighing 0.01g of TEMPO and 0.1g of NaBr to be dissolved in 100m L deionized water by a TEMPO oxidation method, adding 1g of alpha-cellulose, continuously stirring until the alpha-cellulose is completely dissolved, slowly dripping 8mmol of sodium hypochlorite, respectively adjusting the pH value to about 10 by dilute hydrochloric acid and NaOH solution, reacting for 4h, adding 5ml of absolute ethyl alcohol to terminate the reaction, and washing with deionized water to be neutral. Taking 2mg/ml oxidized cellulose suspension, performing ultrasonic treatment for 30min under 600W power, then performing centrifugal treatment for 10min (speed 10000 r/min), collecting supernate in a centrifugal tube to obtain the nano cellulose suspension, wherein the diameter grade of nano cellulose is distributed in the range of 10-50 nm, and finally preparing the nano cellulose solution with the mass concentration of 0.3%.
Adding the bamboo charcoal powder and the nano-cellulose into the nano-cellulose solution according to the mass ratio of 8:1, magnetically stirring for 4 hours at normal temperature, and then ultrasonically dispersing for 30 minutes at low temperature to obtain a bamboo charcoal powder/nano-cellulose solution; and (3) performing rotary evaporation on the prepared bamboo charcoal powder/nano cellulose solution at 60 ℃ by adopting a rotary evaporator for 12 hours, concentrating the solution into bamboo charcoal powder/nano cellulose gel, freezing the bamboo charcoal powder/nano cellulose gel at-50 ℃ for 8 hours, taking out the bamboo charcoal powder/nano cellulose gel, and performing vacuum (5Pa) drying to form a bamboo charcoal powder bulk material. And crushing the obtained bamboo charcoal powder block material again to prepare bamboo charcoal powder particles with the average particle size diameter of 3 mm.
And (3) soaking the obtained bamboo charcoal powder particles in water-soluble phenolic resin (with the solid content of 35%) for 30 minutes, taking out, airing at normal temperature for 24 hours, drying at low temperature of 60 ℃ for 12 hours, and controlling the water content of the bamboo charcoal powder particles to be within the range of 10-16%. Setting the density of the bamboo charcoal board (0.6 g/cm)3) Weighing the impregnated bamboo charcoal powder particles, uniformly paving the bamboo charcoal powder particles in a hot pressing plate mold (the breadth of the hot pressing plate is 1220 multiplied by 2440mm), setting the thickness of the bamboo charcoal plate to be 6mm, setting the hot pressing temperature to be 140 ℃, the unit pressure to be 2.0 MPa and the hot pressing time to be 15 minutes, and finally cooling to 60 ℃ to unload the plate to obtain the novel environment-friendly bamboo charcoal plate for decoration.
The actual density of the bamboo charcoal board produced by the method is 0.61g/cm3The flame retardant rating is B1, the water content is 2%, the face nail-holding power is 2340N, the bending strength is 27MPa, and the elastic modulus is 2840 MPa.
Example 2
According to the water content of 10%, the fixed carbon content of 85% -88%, the ash content of 2% -4%, the specific surface area of 500 m/g and the volatile component of 6% -8%; the air dry density is 0.80g/cm3The bamboo charcoal is purchased, dried to be absolutely dry and then crushed into bamboo charcoal powder of 800 meshes.
Using 100-mesh bamboo powder as a raw material, removing lignin and hemicellulose by adopting 25% chlorous acid solution and sodium hydroxide solution, then, weighing 0.01g of TEMPO and 0.1g of NaBr to be dissolved in 100m L deionized water by a TEMPO oxidation method, adding 1g of alpha-cellulose, continuously stirring until the alpha-cellulose is completely dissolved, slowly dripping 8mmol of sodium hypochlorite, respectively adjusting the pH value to about 10 by dilute hydrochloric acid and NaOH solution, reacting for 4h, adding 5ml of absolute ethyl alcohol to terminate the reaction, and washing with deionized water to be neutral. Taking 2mg/ml oxidized cellulose suspension, performing ultrasonic treatment for 30min under 600W power, then performing centrifugal treatment for 10min (speed 10000 r/min), collecting supernate in a centrifugal tube to obtain the nano cellulose suspension, wherein the diameter grade of nano cellulose is distributed in the range of 10-50 nm, and finally preparing the nano cellulose solution with the mass concentration of 0.5%.
Adding the bamboo charcoal powder and the nano-cellulose into the nano-cellulose solution according to the mass ratio of 5:1, magnetically stirring for 6 hours at normal temperature, and then ultrasonically dispersing for 45 minutes at low temperature to obtain a bamboo charcoal powder/nano-cellulose solution; and (3) performing rotary evaporation on the prepared bamboo charcoal powder/nano cellulose solution at 60 ℃ for 12 hours by adopting a rotary evaporator, concentrating the solution into bamboo charcoal powder/nano cellulose gel, freezing the bamboo charcoal powder/nano cellulose gel at-50 ℃ for 12 hours, taking out the bamboo charcoal powder/nano cellulose gel, and performing vacuum (6Pa) drying to form a bamboo charcoal powder bulk material. And crushing the obtained bamboo charcoal powder block material again to prepare bamboo charcoal powder particles with the average particle size diameter of 4 mm.
And (3) soaking the obtained bamboo charcoal powder particles in water-soluble phenolic resin (with the solid content of 35%) for 40 minutes, taking out, airing at normal temperature for 24 hours, drying at low temperature of 70 ℃ for 12 hours, and controlling the water content of the bamboo charcoal powder particles to be within the range of 10-14%. Setting the density of the bamboo charcoal board (0.70 g/cm)3) Weighing the impregnated bamboo charcoal powder particles, uniformly paving the bamboo charcoal powder particles in a hot pressing plate mold (the breadth of the hot pressing plate is 1220 multiplied by 2440mm), setting the thickness of the bamboo charcoal plate to be 8mm, setting the hot pressing temperature to be 150 ℃, the unit pressure to be 3.0 MPa, the hot pressing time to be 20 minutes, and finally cooling to 50 ℃ to unload the plate to obtain the novel environment-friendly bamboo charcoal plate for decoration.
The actual density of the bamboo charcoal board produced by the method is 0.706g/cm3The flame retardant rating is B1, the water content is 3%, the face nail-holding power is 3170N, the bending strength is 38MPa, and the elastic modulus is 3790 MPa.
Example 3
According to the water content of 10%, the fixed carbon content of 85% -88%, the ash content of 2% -4%, the specific surface area of 500 m/g and the volatile component of 6% -8%; the air dry density is 0.90g/cm3The bamboo charcoal is purchased, dried to be absolutely dry and then crushed into 1000 meshes of bamboo charcoal powder.
Using 100-mesh bamboo powder as a raw material, removing lignin and hemicellulose by adopting 25% chlorous acid solution and sodium hydroxide solution, then, weighing 0.01g of TEMPO and 0.1g of NaBr to be dissolved in 100m L deionized water by a TEMPO oxidation method, adding 1g of alpha-cellulose, continuously stirring until the alpha-cellulose is completely dissolved, slowly dripping 8mmol of sodium hypochlorite, respectively adjusting the pH value to about 10 by dilute hydrochloric acid and NaOH solution, reacting for 4h, adding 5ml of absolute ethyl alcohol to terminate the reaction, and washing with deionized water to be neutral. Taking 2mg/ml oxidized cellulose suspension, performing ultrasonic treatment for 30min under 600W power, then performing centrifugal treatment for 10min (speed 10000 r/min), collecting supernate in a centrifugal tube to obtain the nano cellulose suspension, wherein the diameter grade of nano cellulose is distributed in the range of 10-50 nm, and finally preparing the nano cellulose solution with the mass concentration of 0.5%.
Adding the bamboo charcoal powder and the nano-cellulose into the nano-cellulose solution according to the mass ratio of 3:1, magnetically stirring for 6 hours at normal temperature, and then ultrasonically dispersing for 45 minutes at low temperature to obtain a bamboo charcoal powder/nano-cellulose solution; and (3) performing rotary evaporation on the prepared bamboo charcoal powder/nano cellulose solution at 60 ℃ for 12 hours by adopting a rotary evaporator, concentrating the solution into bamboo charcoal powder/nano cellulose gel, freezing the bamboo charcoal powder/nano cellulose gel at-50 ℃ for 12 hours, taking out the bamboo charcoal powder/nano cellulose gel, and performing vacuum (5Pa) drying to form a bamboo charcoal powder bulk material. And crushing the obtained bamboo charcoal powder block material again to prepare bamboo charcoal powder particles with the average particle size diameter of 5 mm.
And (3) soaking the obtained bamboo charcoal powder particles in water-soluble phenolic resin (with the solid content of 35%) for 45 minutes, taking out, airing at normal temperature for 24 hours, drying at a low temperature of 80 ℃ for 12 hours, and controlling the water content of the bamboo charcoal powder particles to be within the range of 12-16%. Setting the density of the bamboo charcoal board (0.80 g/cm)3) Weighing the impregnated bamboo charcoal powder particles, uniformly spreading in a hot-pressing plate mold (the breadth of the hot-pressing plate is 1220 × 2440mm), wherein the thickness of the bamboo charcoal plate is 10mm, the hot-pressing temperature is set to be 150 ℃, and the bamboo charcoal powder particles are uniformly spread in the hot-pressing plate moldThe bit pressure is 2.5 MPa, the hot pressing time is 24 minutes, and finally the board is cooled to 40 ℃ and unloaded to obtain the novel environment-friendly decorative bamboo charcoal board.
The actual density of the bamboo charcoal board produced by the method is 0.804g/cm3The flame retardant rating is B1 grade, the water content is 3 percent, the face nail-holding power is 3218N, the bending strength is 46MPa, and the elastic modulus is 4589 MPa.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations of the technical solution are possible in light of the present description. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. A preparation method of a novel environment-friendly decorative bamboo charcoal board and a product thereof are characterized by comprising the following steps:
firstly, bamboo charcoal is crushed into bamboo charcoal powder with the particle size of 10-50 mu m, and the particle size is 300-1000 meshes;
secondly, dissolving the nano-cellulose in deionized water to form a nano-cellulose solution by taking the biomass nano-cellulose as a dispersing agent, wherein the diameter grade of the nano-cellulose is 10-100 nm;
adding the prepared bamboo charcoal powder into the nano-cellulose solution, uniformly stirring at normal temperature, and then carrying out ultrasonic dispersion treatment to prepare a bamboo charcoal powder/nano-cellulose solution which is uniformly and stably dispersed;
fourthly, concentrating the prepared bamboo charcoal powder/nano cellulose solution into a bamboo charcoal powder/nano cellulose gel state by adopting a rotary evaporator, taking out the bamboo charcoal powder/nano cellulose gel state, and freeze-drying the bamboo charcoal powder/nano cellulose gel solution to form a bamboo charcoal powder block material;
fifthly, the obtained bamboo charcoal powder block material is crushed again;
sixthly, putting the obtained bamboo charcoal powder particles into a phenolic resin aqueous solution for soaking for a certain time, taking out the bamboo charcoal powder particles, airing the bamboo charcoal powder particles at normal temperature, and drying the bamboo charcoal powder particles at low temperature to form impregnated bamboo charcoal powder particles;
and (seventhly), weighing the impregnated bamboo charcoal powder particles according to the preset density of the bamboo charcoal board, then uniformly paving the bamboo charcoal powder particles in a hot-pressing board mould, and pressing the bamboo charcoal powder particles at high temperature and high pressure to prepare the novel decorative bamboo charcoal board.
2. The method for preparing a novel environment-friendly bamboo charcoal board for decoration and the product thereof according to claim 1 are characterized in that the step (one) specifically comprises the following operations: the bamboo charcoal is self-made or purchased in the market, the moisture content of the bamboo charcoal is 10% -14%, the fixed carbon content is 85% -88%, the ash content is 2% -4%, the specific surface area is 300-600 m/g, the volatile matter is 6% -8%, and the air-drying density is more than or equal to 0.80g/cm3；
The bamboo charcoal comprises activated carbon prepared by taking bamboo charcoal as a base material, and the bamboo charcoal is ground into bamboo charcoal powder with the particle size of 10-50 mu m and the particle size of 300-1000 meshes.
3. The preparation method of the novel environment-friendly decorative bamboo charcoal board and the product thereof according to claim 1, wherein the step (II) specifically comprises the following operations: taking 80-100-mesh bamboo powder as a raw material, removing lignin and hemicellulose by adopting a chlorous acid solution with the concentration of 15-25% and a sodium hydroxide solution, then, weighing 0.01g of TEMPO and 0.1g of NaBr to be dissolved in 100mL of deionized water by a TEMPO oxidation method, adding 1g of alpha-cellulose, continuously stirring until the alpha-cellulose is completely dissolved, then, slowly dripping 8mmol of sodium hypochlorite, respectively adjusting the pH to about 10 by using dilute hydrochloric acid and a NaOH solution, reacting for 4 hours, adding 5mL of absolute ethyl alcohol to terminate the reaction, and washing with deionized water to be neutral; taking 2mg/ml oxidized cellulose suspension, performing ultrasonic treatment for 30min under 600W power, then performing centrifugal treatment for 10min at the speed of 10000r/min, collecting supernate in a centrifugal tube to obtain nano cellulose suspension, and finally preparing nano cellulose solution with the mass concentration of 0.2-0.5%;
the diameter of the nano-cellulose is self-made or purchased in the market, and the diameter grade is 10-100 nm.
4. The preparation method of the novel environment-friendly decorative bamboo charcoal board and the product thereof according to claim 1, wherein the step (three) specifically comprises the following operations: the mass ratio of the bamboo charcoal powder to the nano-cellulose is 1-8: 1, magnetically stirring for 4-6 hours at normal temperature, and then ultrasonically dispersing for 40-60 minutes at low temperature to obtain the bamboo charcoal powder/nano cellulose solution.
5. The preparation method of the novel environment-friendly decorative bamboo charcoal board and the product thereof according to claim 1, wherein the step (IV) specifically comprises the following operations: and (3) performing rotary evaporation on the prepared bamboo charcoal powder/nano cellulose solution at the temperature of 45-60 ℃ by adopting a rotary evaporator for 12-18 hours, concentrating the solution into bamboo charcoal powder/nano cellulose gel, freezing the bamboo charcoal powder/nano cellulose gel at the temperature of-50 ℃ for 6-8 hours, taking out the bamboo charcoal powder/nano cellulose gel, and performing vacuum drying on the bamboo charcoal powder/nano cellulose gel at the pressure of 3.5-6 Pa to form a bamboo charcoal powder bulk material.
6. The preparation method of the novel environment-friendly decorative bamboo charcoal board and the product thereof according to claim 1, wherein the step (V) specifically comprises the following operations: and (3) crushing the obtained bamboo charcoal powder block material again to prepare bamboo charcoal powder particles with the average particle size diameter of 3-5 mm.
7. The preparation method of the novel environment-friendly decorative bamboo charcoal board and the product thereof according to claim 1, wherein the step (VI) specifically comprises the following operations: and (3) putting the obtained bamboo charcoal powder particles into water-soluble phenolic resin with the solid content of 30-40% for soaking for 30-60 minutes, taking out the bamboo charcoal powder particles, airing the bamboo charcoal powder particles for 12-24 hours at normal temperature, drying the bamboo charcoal powder particles for 4-12 hours at a low temperature of 50-80 ℃, and controlling the water content of the bamboo charcoal powder particles to be 10-16%.
8. The preparation method of the novel environment-friendly decorative bamboo charcoal board and the product thereof according to claim 1, wherein the step (VII) specifically comprises the following operations: the predetermined density of the bamboo charcoal board is 0.55-0.8 g/cm3Weighing the bamboo charcoal powder particles, uniformly spreading in a hot pressIn the plate mold, the thickness of the bamboo charcoal plate is determined according to the specification of an actually required product, the bamboo charcoal plate is hot-pressed within the temperature range of 135-150 ℃ and the unit pressure within the range of 1.0-4.0 MPa, and finally the bamboo charcoal plate is cooled to 40-60 ℃ and unloaded to obtain the required novel environment-friendly bamboo charcoal plate for decoration.
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| CN114506839A (en) * | 2022-02-24 | 2022-05-17 | 西安理工大学 | Electrically conductive aerogel sheet and method of making same |
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| CN112123501A (en) * | 2020-09-18 | 2020-12-25 | 湖南竹海炭生源生物科技有限公司 | Preparation method of novel environment-friendly bamboo charcoal board for decoration |
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| CN112123501A (en) * | 2020-09-18 | 2020-12-25 | 湖南竹海炭生源生物科技有限公司 | Preparation method of novel environment-friendly bamboo charcoal board for decoration |
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| CN114506839A (en) * | 2022-02-24 | 2022-05-17 | 西安理工大学 | Electrically conductive aerogel sheet and method of making same |
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