228results about "Pressure impregnation" patented technology

The invention discloses a purple light wingceltis furniture mirror surface treatment process and purple light wingceltis furniture, and belongs to the technical field of furniture surface treatment.The purple light wingceltis furniture mirror surface treatment process comprises the specific steps that S1, a wood component is subjected to vacuum impregnation stabilization treatment; s2, the wood component treated in the S1 is subjected to multi-stage drying, moisture regaining and re-drying treatment; s3, the wood component treated in the S2 is soaked in wax liquid emulsion and subjected to ultrasonic cavitation treatment; s4, the wood component treated in the S3 is soaked in composite wax liquid for multi-stage progressive wax boiling treatment; s5, dewaxing, grinding and polishing treatment is conducted on the wood component treated in the S4; and S6, the wood component treated in S5 is sealed and protected. According to the technical scheme, the mirror surface effect, pore sealing, antifouling and waterproof performance, wood stability and other aspects are remarkably improved in the field of purple light wingceltis furniture surface treatment.

The invention discloses a wood-based composite phase-change material and a preparation method thereof, and belongs to the technical field of phase-change materials.The preparation method of the wood-based composite phase-change material comprises the following steps that wood is cut and then added into delignification liquid to be heated, the wood is taken out and washed with water, and delignified wood is obtained; the delignification wood is added into the modification liquid to be heated, and after being taken out, the delignification wood is washed and dried to obtain pretreated wood; mixing polyethylene glycol, citric acid and boric acid, heating and stirring to obtain a phase change material; dipping the pretreated wood into the phase change material for vacuum dipping, taking out and drying to obtain the phase change material. The modified liquid is prepared from an ethanol water solution, a modified filler, 2-(3, 4-cyclohexene oxide) ethyltrimethoxysilane and triethylamine. The delignification liquid and the modification liquid are adopted for pretreating the wood, so that the wood can be better firmly combined with the phase change material, leakage is prevented, and the finally prepared wood-based composite phase change material has excellent heat management capacity and stability.

The invention relates to the technical field of sound absorption materials, in particular to an aerogel and cork composite sound absorption material with a dual-scale pore structure and a preparation method. The preparation method of the aerogel-softwood composite sound absorption material with the double-scale pore structure comprises the following steps that softwood particles subjected to microwave treatment are placed in a SiO2 aerogel precursor solution to be subjected to vacuum impregnation treatment, then hydrolysis and condensation polymerization are conducted, a three-dimensional network structure is formed through crosslinking, freeze drying is conducted after water soaking, and the aerogel-softwood composite sound absorption material with the double-scale pore structure is obtained. SiO2 aerogel and cork composite particles are obtained; and spraying a polyurethane adhesive into the SiO2 aerogel and cork composite particles, and then carrying out hot press molding to obtain the aerogel and cork composite sound absorption material with the dual-scale pore structure. According to the preparation method, microwave treatment and dipping treatment are combined, so that the sound absorption performance of the prepared aerogel and cork composite sound absorption material with the double-scale pore structure is improved, and the problem that sound absorption is not facilitated due to the unique cell structure of cork is solved.

The invention discloses a self-repairing type phase change microcapsule and application thereof in a wood-based energy storage wall, the self-repairing type phase change microcapsule is characterized in that an inner core layer is composed of composite paraffin and butyl stearate composite phase change materials, gradient refractive index silicon dioxide microspheres are arranged on the surface of the inner core layer, and a middle shell layer is a composite film formed by polyurea and furan-epoxy monomer copolymer; the reinforced shell layer is of a three-dimensional network structure which is formed by nano SiO2 through a sol-gel method, has the porosity of 20-25% and is in gradient distribution; according to the invention, a three-dimensional network structure formed by a Diels-Alder dynamic bonding network of a middle shell layer and nano SiO2 of an enhanced shell layer is used for synergistically constructing a self-repairing system of the microcapsule, so that the self-repairing function of the phase change microcapsule material is realized, the defect of failure caused by physical damage of the microcapsule is avoided, and the service life of the phase change microcapsule material is prolonged. And meanwhile, through gradient packaging preparation of the inner core layer and the enhanced shell layer, the problem of thermal stress concentration is effectively solved.

The invention provides a modification method for improving the size stability of rubber wood and a modified material and application thereof, and relates to the field of rubber wood processing. The modification method comprises the following steps: 1, mixing choline chloride with a hydrogen bond donor compound containing carboxyl to obtain a DES solvent, and adding water to obtain a DES solution; secondly, the rubber wood plate is put into the DES solution in the first step, pressurized dipping treatment is carried out, and then the rubber wood plate is taken out and aired; and thirdly, the rubber wood treated in the second step is placed at the temperature of 150-160 DEG C to be subjected to heat treatment for 1-2 h, and the rubber wood DES modified material is obtained and placed under the room temperature condition to be balanced. The modification method is simple and easy to operate, the hygroscopicity of the rubber wood is remarkably reduced, the dimensional stability of the rubber wood is improved, the modification liquid can be repeatedly used, and cost saving and efficiency increasing are achieved. The environment-friendly and performance bottlenecks of a traditional method are solved, a new way is opened up for efficient value-added utilization of rubber wood, and the strategic requirement of sustainable material development is met.

The invention provides a preparation method of a stable-size and high-strength laminated timber, which comprises the following steps of: mixing boric acid and choline chloride, and heating and melting at 90 DEG C to form a uniform, stable and transparent liquid, so as to obtain a deep eutectic solvent DES; the preparation method comprises the following steps: under the vacuum degree of-0.1 MPa, dipping wood veneers in DES, performing high-temperature steam sterilization treatment under the condition of 121 DEG C, assembling the veneers subjected to multi-layer treatment according to a rift-grain mode, and performing hot pressing at 160 DEG C to obtain the laminated timber with stable size and high strength. The prepared laminated timber has dimensional stability and good mechanical properties, has structural applicability of direct contact with a moisture environment, and has the advantages of mildew resistance, corrosion resistance, flame retardance and the like.

The invention provides a solid wood floor secondary balance humidifying method based on dynamic moisture content closed-loop control. The solid wood floor secondary balance humidifying method comprises the steps that a wood digital structure model is established; based on the wood digital structure model, a deep learning algorithm is used for recognizing a high-density area and a low-density area, laser micropore machining is conducted on the high-density area, surface sealing treatment is conducted on the low-density area, and preprocessed wood is obtained; sequentially carrying out silane coupling agent pretreatment and titanate coupling agent modification treatment on the pretreated wood, and automatically adjusting temperature and humidity parameters in a cabin when detecting that the moisture content drift is greater than 0.3%, so as to control the moisture content of the wood in a range of 8-10%; and the wood obtained after dipping treatment is subjected to programmed heating curing treatment, heat of high-temperature gas generated in the curing process is recycled through a heat exchanger and used for a humidity adjusting process, and a cured solid wood floor product is obtained.

The invention discloses a preparation method of flame-retardant recombined bamboos. The preparation method comprises the steps that bamboo chips are put into an alkaline solution to be treated; immersing the bamboo chips into a NaIOO solution for reaction, and then putting the bamboo chips into a NaClO solution for reaction; the bamboo chips are put into a nano-cellulose, montmorillonite and sodium silicate ternary composite solution to be subjected to vacuum impregnation and normal-pressure impregnation; the bamboo chips are put into phenolic resin to be subjected to normal-pressure impregnation and vacuum impregnation, and then low-temperature drying is conducted; and the bamboo chips are laid in a mold in parallel in the grain direction, cold press forming is conducted, then hot pressing is conducted, and finally pressure reduction and cooling are conducted in stages till demolding is conducted. Nano montmorillonite is uniformly dispersed in a sodium silicate solution by using carboxylated nano cellulose, and inorganic components of montmorillonite and sodium silicate can be uniformly and firmly constructed on the surface of a bamboo chip which is pretreated by an alkaline solution and oxidized by NaIOO and NaClO solutions by abundant carboxyl groups under the action of hydrogen bonds, covalent bonds and the like, so that a compact layered network structure is formed; and the flame retardant property of the recombined bamboo is effectively improved.

The invention relates to a method for producing a wooden composite board, comprising the steps: producing of a raw wooden composite board which has a first side surface, a second side surface which runs parallel to the first side surface, and edge surfaces which connect the side surfaces to one another; applying of a flame retardant-containing liquid at least to the first side surface; and applying of a negative pressure to the second side surface, with the result that the flame retardant-containing liquid is sucked into an edge zone of the raw wooden composite board; and / or applying of a positive pressure to the first side surface, with the result that the flame retardant-containing liquid is pressed into an edge zone of the raw wooden composite board, with the result that the wooden composite board is produced.

The invention relates to the technical field of cork materials, in particular to SiO2-ZrO2 / cork composite particles and a preparation method and application thereof. The SiO2-ZrO2 / cork composite particles are prepared by adopting a sol-gel method, enabling SiO2-ZrO2 sol to be in full contact with and permeate into each cork particle through a vacuum impregnation process, and then forming a firm SiO2-ZrO2 layer on the surface of the cork particle after aging and freeze drying. On one hand, the ratio of silicon to zirconium is accurately controlled, the enhancement effect is maximized on the premise of avoiding particle aggregation, and the indentation damage resistance and wear resistance of the composite material are synergistically improved, and on the other hand, by regulating and controlling the volume ratio of the water-ethanol mixed solvent, the hydrolytic stability and the coating uniformity of sol are effectively improved, and the composite material has good application prospects. The bonding strength of SiO2-ZrO2 on a cork base is enhanced, the applicability of SiO2-ZrO2 to floors and wallboards is enhanced, and a reliable technical path is provided for development of high-performance environment-friendly building materials.

A high-dimensional stability flame-retardant wood-based panel, its preparation, and its application are disclosed. The preparation includes: placing the wood-based panel in an impregnation tank and injecting an aqueous solution of branched polyethyleneimine; removing the wood-based panel and drying it to allow the amino groups on the branched polyethyleneimine to undergo a grafting reaction with the hydroxyl groups on the wood; placing the wood-based panel in an impregnation tank and injecting an aqueous solution of 3-aminopropyltriethoxysilane; removing the wood-based panel and drying it to allow the unreacted amino groups on the branched polyethyleneimine grafted onto the wood to chemically react with the hydroxyl groups on the phosphate; and placing the wood-based panel in an impregnation tank and injecting an aqueous solution of 3-aminopropyltriethoxysilane to chemically react with the unreacted hydroxyl groups on the phosphate that have reacted on the branched polyethyleneimine to chemically react with the amino groups on the 3-aminopropyltriethoxysilane. This provides a wood-based panel that simultaneously satisfies flame-retardant properties and high dimensional stability.

The invention discloses a production method for improving the stability of a wooden guitar, and belongs to the technical field of musical instrument manufacturing. The method comprises the following specific steps that wood is sawn into boards, the surfaces of the boards are cleaned, then the boards are placed in deionized water to be subjected to ultrasonic treatment, after treatment is completed, low-temperature drying is conducted, and the boards subjected to ultrasonic treatment are obtained; then putting the wood into a glyoxal solution, carrying out vacuum pressurization dipping treatment, taking out and drying the wood after dipping, and adjusting the moisture content of the wood to be balanced to obtain a glyoxal dipped board; the preparation method comprises the following steps: preparing a glyoxal-polyethylene glycol impregnated plate, soaking the glyoxal-polyethylene glycol impregnated plate in a polyethylene glycol impregnation liquid, carrying out vacuum impregnation treatment, after impregnation is completed, drying, adjusting the moisture content to be balanced to obtain the glyoxal-polyethylene glycol impregnated plate, and cutting and assembling the glyoxal-polyethylene glycol impregnated plate to prepare the wooden guitar. The wooden guitar produced through the method is high in size stability, large deformation caused by changes of external temperature and humidity is avoided, the mildew and corrosion resistance of the wooden guitar is enhanced after dipping treatment, and the service life of the wooden guitar is greatly prolonged.

The invention relates to wood furniture with mothproof, scratch-resistant and flame-retardant properties and a preparation method thereof, the wood furniture comprises a furniture body, and the furniture body is formed by assembling a plurality of pieces of wood; each piece of wood is subjected to pressurization soaking treatment through an insect-proof flame retardant; the surface of the furniture body is coated with a scratch-resistant layer; the scratch-resistant layer is formed by coating the surface of the furniture body with a scratch-resistant coating; according to the wood furniture, due to the dual-structure design of'internal insect-proof flame-retardant treatment and outer scratch-resistant coating ', organic combination of insect damage prevention, scratch resistance and flame retardance is achieved, and the wood furniture has lasting and comprehensive insect-proof performance and excellent scratch-resistant and flame-retardant performance.

This invention relates to the field of wood processing technology, and provides a novel method for preparing slicing from the decay and softening of extra-hardwood. The method includes the following steps: immersing a wood sample in a water-filled container, first applying a vacuum, then depressurizing and maintaining the pressure for a period of time to allow liquid water to penetrate the wood cell cavities; heating the immersed sample and applying a vacuum again to cause the liquid water to boil and vaporize; extracting the sample after the bursting treatment with cold and hot water sequentially to remove extractives from the wood and reduce its decay resistance; adjusting the moisture content; treating the sample with brown rot fungi to cause decay and softening on the axial surface of the sample; soaking the sample in water and then freezing it until it is solid, followed by slicing. This invention can successfully produce slicings of extra-hardwood, providing a strong theoretical foundation and technical means for studying the structure of extra-hardwood, predicting its physical and mechanical properties, and improving its high-value-added processing and utilization.

The invention discloses a production method of flexible high-strength large-breadth thin bamboo strips. The production method comprises the following steps: [1] manufacturing rough planed bamboo strips; (2) carbonizing the bamboo canes; (3) drying the bamboo canes; (4) bamboo board manufacturing; (5) humidifying the bamboo board; the wet laminated bamboo board is directly placed on a slicing machine, the board is fixed through a vacuum adsorption device and sliced, the included angle between the rear angle and the wedge angle of a slicing tool and the horizontal plane of the bamboo board ranges from 15 degrees to 25 degrees, the included angle between the cutting edge of the slicing tool and the slicing feeding direction is the cutting edge inclination angle ranging from 30 degrees to 55 degrees, and micro thin bamboos with the thickness ranging from 0.08 mm to 0.5 mm are obtained through slicing; and (7) drying and laminating are conducted, specifically, the micro thin bamboo is manually leveled and fed into a drying machine, the hot air drying temperature ranges from 70 DEG C to 120 DEG C, the hot air speed ranges from 6 m / s to 8 m / s, the micro thin bamboo is dried till the water content is lower than 12%, then the micro thin bamboo enters a laminating machine, the micro thin bamboo and a polymer film are compounded at the temperature ranging from 70 DEG C to 190 DEG C, or the micro thin bamboo and paper are glued, and the large-breadth micro thin bamboo material is prepared. The finished product rate of sliced thin bamboos is increased, and the application field of bamboos is greatly expanded.

The present invention provides a method for producing a modified wood material. Specifically, the method comprises the following steps: 1) infiltrating a furan derivative resin solution into the wood material, the furan derivative resin solution containing a furan derivative, an inorganic salt that inhibits polymerization of the furan derivative at room temperature, and an inorganic salt that promotes polymerization of the furan derivative; and 2) heating the infiltrated furan derivative resin solution to polymerize the furan derivative in the wood material.

A method of producing a wood-based material that is modified is provided. Specifically, there is provided a method of producing a wood-based material, comprising 1) a step of impregnating a wood-based material with a furan derivative resinification solution that comprises a furan derivative, an inorganic salt inhibiting polymerization of the furan derivative at normal temperature, and an inorganic salt accelerating polymerization of the furan derivative; and 2) a step of polymerizing the furan derivative in the furan derivative resinification solution impregnated into the wood-based material within the wood-based material by means of heating.

The invention relates to the technical field of bamboo plywood, in particular to a bamboo board processing method which comprises the following steps: processing moso bamboos into blocky basic bamboo canes; matching grooves and raised lines which are matched with each other are processed on the two sides of the basic bamboo canes respectively; a plurality of hole channels are uniformly distributed along the length direction; after resin is soaked, the bamboo plates are spliced to form bamboo plates, channels are formed after hole channels are aligned, heating wires penetrate through the channels, and the two ends of the heating wires extend out of the channels; the heating wire is electrified and heated, and meanwhile, part of melted resin is cleaned out, so that each channel is reshaped; the bamboo battens are connected in the width direction to form the bamboo board, the thickness is minimum, and the finally-formed bamboo plywood can be lighter and more convenient; and by combining with the arrangement of the heating wire, the heating wire heats part of resin in the heat exchange channel for partial melting and cleaning, so that the remodeling of the heat exchange channel is realized, and meanwhile, the residual resin can form a connecting effect, a supporting effect and a channel effect.

The utility model belongs to the technical field of oil wood processing equipment, and particularly relates to oil wood pole anti-corrosion processing equipment which comprises a tank body, sealing doors are arranged at the two ends of the tank body, and a filling support is movably connected into the tank body in an inserted mode. At least two sets of overturning supports are rotationally installed on the surface of the filling support, each set of overturning supports are arranged in a mirror image mode, the two overturning supports rotate relatively, one end of each overturning support is provided with a hoop used for being connected to the surface of a supporting rod in a sleeving mode, and the hoop is connected to the surface of the supporting rod in a sleeving mode through a bolt and nut assembly. The hoop is in clearance fit with the supporting rod. According to the oil wood rod filling device, space can be saved in the oil wood rod filling process, and filling is stable and efficient.

In a method for treating wood, wherein a wooden body is impregnated with a polymerizable compound which is polymerizable by oxidation, the polymerizable compound is brought into contact with an oxidizer in the wooden body in order to polymerize the polymerizable compound in situ. The polymerizable compound applied therein comprises a heterocyclic compound with nitrogen and / or sulphur as heteroatom. The oxidizer is brought into solution and the wooden body is saturated with a solution of the oxidizer. The wooden body is subjected to a vapour phase of the heterocyclic compound under an increased pressure and the heterocyclic compound is polymerized in situ in the wood.

The invention discloses an anti-bending and anti-fracture bamboo louver blade and a preparation process thereof, and belongs to the field of building decoration materials. In order to solve the problems that a traditional bamboo louver blade is prone to breakage and bending failure due to the fact that bamboo wood is low in cross grain strength and high in hygroscopicity, performance breakthrough is achieved through multi-dimensional synergistic modification. The preparation process comprises the following steps: selecting bamboo wood of 3-5 years old, cutting the bamboo wood, performing ultrasonic cleaning with sodium carbonate, treating linen fibers with acetic acid and a silane coupling agent, performing vacuum permeation and plastification with a glycerol-citric acid solution, constructing a bamboo wood-fibrofelt-bamboo wood three-layer composite structure, performing hot-pressing curing, and performing gradient drying, low-temperature circulation and beeswax-nano silicon dioxide coating edge sealing. Experiments show that the louver blade can resist bending for 5200 times, the elongation at break is 8.2%, the bending strength is 140 MPa, and the impact strength is 65 kJ / m < 2 >. Compared with a single reinforcing process of resin impregnation or recombined fibers, the bending fatigue resistance is improved by 32.7%-46.2% through cooperation of plasticizing modification, a laminated structure and surface protection, and the method is suitable for high-end building decoration scenes.

The present disclosure is directed to methods for sorting wood veneer materials by property measurement and then improving the properties of veneer materials whose property values ​​are below a target threshold until those materials meet or exceed that threshold. In some aspects of the present disclosure, veneer materials are prepared, non-destructively measured, and sorted into a set of acceptable and unacceptable materials. The unacceptable set of materials can then be treated to improve the density and flexural modulus of the materials therein. Also disclosed herein are products and materials incorporating veneer materials treated according to the disclosed methods.

The invention relates to the technical field of forestry engineering, and discloses a high-pressure dipping processing device and method for improving bamboo performance, the high-pressure dipping processing device comprises a supporting assembly, a container assembly is arranged above the supporting assembly, the container assembly is used for containing bamboos needing high-pressure dipping, and an adjusting assembly is arranged in the container assembly. Through a liquid inlet pipeline, a liquid outlet pipeline, an air inlet pipeline and an air outlet pipeline in the container assembly, the effects of integrated equipment and reduction of the occupied space are achieved, then the synergistic effect of a first supporting plate, a second supporting plate and a clamping plate is utilized, adjacent and attached bamboo and wood materials can be dynamically separated, a second push rod drives the second supporting plate to transversely move, and the effect of separating the bamboo and wood materials is achieved. A first push rod is matched to control longitudinal adjustment of a clamping plate, a vacuum dead zone formed on the bamboo-wood contact surface can be effectively broken, a driving motor drives a cross plate to rotate, the contact area of bamboo wood and impregnation liquid is increased, and the problem of local impregnation rejection caused by traditional stacking impregnation is solved.

The invention relates to the technical field of artificial board processing, in particular to a preparation method of green low-toxicity flame-retardant plywood. The method comprises the following steps: S1, green synthesis and step-by-step dipping treatment of a complexing phosphorus-nitrogen flame retardant; s2, preparation of a flame-retardant adhesive and construction of an interface intumescent flame-retardant system; s3, stepped layered assembly and hot press molding; s4, conducting ion regulation and anti-rust treatment; wherein the complexing phosphorus-nitrogen flame retardant in the step S1 takes phosphorus and nitrogen as core flame-retardant elements and is synthesized through a complexing rapid reaction and cross-linking reaction technology, the reaction temperature is 80-100 DEG C, and the reaction time is 30-60 minutes; the mass ratio of the phosphorus-containing metal complex precursor to the nitrogen source compound to the chitosan to the catalytic substance is (2-3): (5-6): (1-3): (0.5-1). According to the flame-retardant plywood prepared through the method, the combustion rate growth index is smaller than 100 W / s, the 600-s total heat release amount is smaller than 7.0 MJ, the smoke generation rate index of the smoke generation characteristic is smaller than or equal to 30 m / s, the 600-s total smoke generation amount is smaller than or equal to 50 m, and multiple technical defects of traditional flame-retardant plywood are overcome.

This disclosure is directed to methods of separating wood veneer material by property measurements, and thereafter improving the properties of veneer material with property values lower than a target threshold value, until those materials meet or exceed that threshold values. In some aspects of the disclosure, veneer materials are prepared, non-destructively measured, and separated into passing and failing material collections. The failing material collection may then be treated to improve the density and flexural modulus of the material therein. Also disclosed herein are products and materials incorporating the treated veneer materials according to the disclosed methods.

The invention discloses a maleic anhydride / sodium silicate / furfuryl alcohol composite modified Chinese fir and a preparation method and application thereof.The preparation method comprises the following steps that the Chinese fir is placed in a dipping device, a sodium silicate solution is added to do not leave the Chinese fir, and positive pressure is applied to conduct primary dipping treatment; adding a furfuryl alcohol-maleic anhydride compound solution to remove the cedarwood, applying positive pressure to carry out secondary dipping treatment, curing, aging and drying to obtain the maleic anhydride / sodium silicate / furfuryl alcohol compound modified cedarwood. The prepared maleic anhydride / sodium silicate / furfuryl alcohol composite modified Chinese fir has excellent mechanical properties, dimensional stability and loss resistance, can be widely applied to the high-added-value fields of buildings, solid wood furniture and the like, and has remarkable economic benefits and social benefits and good application prospects.

The invention relates to a process for acetylation of wood having a density of above 400 kg / m3, particularly, of Southern Yellow Pine, and acetylated wood obtainable by this method. The described acetylation process allows the production of acetylated wood having higher acetylation levels, such as an acetyl content of at least 20% by weight. The acetylated wood has also a low residual acetic acid content, in particular, lower than 1% by weight. The invention is particularly useful for acetylation on industrial scale of pieces of solid wood, preferably, of wood beams.

The invention discloses an anti-aging highlight veneer shaving board and a preparation method thereof, and belongs to the technical field of wood board production. The manufacturing method comprises the steps of eucalyptus wood shaving preparation, primary drying, potassium acetate treatment, secondary drying, acetic anhydride treatment, tertiary drying, gluing, assembly, pre-pressing and hot pressing, and the acetylated eucalyptus wood shaving board is manufactured. And then sanding, melamine paper pasting, hot pressing, colored paint roller painting, varnish and UV paint curing are conducted, and the anti-aging highlight veneer shaving board is obtained. The product has lasting highlight on the surface, solves the problem of reflection imaging sawtooth waves of a common shaving board, and is suitable for high-end furniture and indoor decoration.

This invention belongs to the field of flame retardant materials technology, and particularly relates to a P-N flame retardant, its preparation method, and its application. The preparation method of the P-N flame retardant includes the following steps: (1) diluting aminotrimethylenephosphonic acid with a solvent; (2) adding 1,3,5-tris(2-hydroxyethyl)1,3,5-triazine-2,4,6-trione to the solution obtained in step (1), reacting in a constant temperature oil bath for 2-5 hours to obtain a P-N flame retardant precursor solution; (3) preparing an aqueous solution of an amino compound; (4) adding the P-N flame retardant precursor solution dropwise to the aqueous solution of the amino compound, reacting in a constant temperature oil bath for 5-10 minutes to produce a white precipitate, continuing the reaction for 0.5-1 h after the precipitate is produced, washing and filtering the precipitate, and drying to obtain the P-N flame retardant. The P-N flame retardant of this invention is a white solid that is almost insoluble in water at room temperature and has good flame retardant effect on bio-based materials.

The invention discloses super-tough flame-retardant plastic mineralized composite wood as well as a preparation method and application thereof. Natural wood is delignified, then is soaked in water for plasticizing, then is oxidized by using an oxidizing agent, cellulose hydroxyl is converted into carboxyl so as to provide mineralization nucleation sites, and in-situ mineralization of calcium carbonate in the wood is further realized in calcium salt and soluble carbonate; and finally, the density is greatly improved through water soaking and hot pressing treatment, and the mineralized composite wood is obtained. The mineralized composite wood has ultrahigh strength, high toughness, excellent flame retardance and plasticity, and the performance of the mineralized composite wood is obviously superior to that of natural wood and traditional structural materials. The preparation method provided by the invention is green and low in cost, and the obtained product is suitable for the fields of light high-strength structural materials and multifunctional composite materials, and has wide application prospects in the fields of buildings, energy sources and the like.