148results about "Polymerisation impregnation" patented technology

A method of treating a cellulose-based material, for example wood and engineered wood is provided, wherein the process involves the following steps: selecting and placing the cellulose-based material in a treatment chamber; impregnating the cellulose-based material with an impregnating agent consisting of an aqueous solution comprising a fluid suitable for esterification; facilitating a hydrolysis process whereby the impregnating agent reacts resulting in the formation of esters and polyesters inside the cellulosed-based material.

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 belongs to the technical field of deodorants, and relates to a poplar fiber board deodorant, which is prepared from the following ingredients in parts by mass: 22 to 28 parts of multi-ion water, 22 to 28 parts of amino formaldehyde catching agents, 4 to 6 parts of nanometer TiO2, 8 to 12 parts of beta-cyclodextrin, 12 to 18 parts of porous adsorbents, 4 to 6 parts of surfactants and 12 to 18 parts of plant essential oil emulsion. The invention further discloses a preparation method and application of the poplar fiber board deodorant. The deodorant disclosed by the invention has a multi-mechanism synergistic deodorization effect of chemical decomposition, physical adsorption and biological bacteriostasis, can effectively remove peculiar smell of wood and peculiar smell problems caused by an adhesive, a waterproof agent and the like added in a plate processing process, reduces smell release of a poplar fiber plate, and improves indoor air quality.

A method for forming an engineered veneer block includes stacking a plurality of laminate layers. The method also includes spreading a bonding agent between each layer of the plurality of laminate layers. The bonding agent includes an adhesive. The adhesive consists essentially of one or more no added formaldehyde adhesives. The method also includes slicing an engineered veneer from the engineered veneer block. The engineered veneer has a thickness in the range of 0.1 millimeters to 0.5 millimeters.

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 application discloses an ant-termite drug barrier system for wood composites and a construction method and application thereof, and relates to the technical field of wood composite ant-termite prevention. The ant-termite drug barrier system comprises a drug active ingredient, a nanoscale modified silicon dioxide carrier, a penetration enhancer, an adhesion enhancer and a stabilizer, and the drug barrier can be efficiently constructed on the surface of the wood composite by a vacuum-assisted impregnation method, and the thickness is controllable and the operation is convenient. The nanoscale modified silicon dioxide carrier is combined with a complex system of sodium fatty alcohol polyoxyethylene ether sulfate and alkyl polyglycoside, so that the permeability and adhesion can be significantly improved. The system is suitable for indoor and outdoor environments, can be coated with a waterproof coating to prolong the service life, and can be conveniently repaired when locally damaged; the drug active ingredient is non-toxic or low-toxic, so that an efficient, durable and environmentally-friendly ant-termite solution for wood composites is provided.

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.

A filler material is applied to a plurality of wood elements which are joined to form a composite wood product, said joining comprising applying ultrasonic energy to the plurality of wood elements, said ultrasonic energy having a frequency within a frequency range of 10 kHz to 20 MHz.

The application discloses a high-efficiency dehydration protection method for water-saturated wooden cultural relics, and specifically comprises the following steps: step 1, preparing a xylitol aqueous solution with a concentration of 30-80 wt%; step 2, soaking the water-saturated wooden cultural relics in the xylitol aqueous solution prepared in step 1 until the xylitol permeates into the water-saturated wooden cultural relics; step 3, taking out the water-saturated wooden cultural relics and removing the excess xylitol on the surface of the water-saturated wooden cultural relics; step 4, spraying a chitosan aqueous solution with a concentration of 1-5 wt% on the surface of the water-saturated wooden cultural relics treated in step 3 for multiple times; and step 5, spraying a glutaraldehyde aqueous solution with a concentration of 2-10 wt% on the surface of the water-saturated wooden cultural relics treated in step 4 for multiple times, then wrapping the water-saturated wooden cultural relics with a breathable film, and airing the water-saturated wooden cultural relics until the constant weight of the water-saturated wooden cultural relics is reached, thereby completing the dehydration and shaping of the water-saturated wooden cultural relics.

In some embodiments, a material comprises a contiguous block of chemically-modified wood infiltrated with an index-matching polymer. The contiguous block has a first section that is substantially transparent to light and a second section that is translucent or opaque. The first section can have a lower lignin content than the second section. Alternatively, the first section can have a chromophore state altered from that of the wood in its natural state, and the lignin in the second section can retain a chromophore state of the wood in its natural state. In some embodiments, a material comprises a section of wood chemically-modified such that chromophores of lignin within the wood in its natural state are altered or removed, and the section retains at least 70% of the lignin of the wood in its natural state. Methods for forming such materials are also disclosed.

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 application discloses a preparation method of formaldehyde-free low-carbon wood composite material, which comprises the following steps: preparing an impregnation solution, removing lignin on wood by using an alkaline solution to obtain a wood matrix; pretreating the obtained wood matrix by using a gas phase treatment process to control and adjust the pores on the wood matrix; cyclically freezing and impregnating the wood matrix by using the impregnation solution; heating the wood matrix after the S3 treatment; and ultraviolet curing, so that the voids on the wood after the lignin is removed are more uniform, the impregnation of the impregnation solution in the later impregnation process is easier, the situation that all areas cannot be filled is avoided, the uniformity of the pores is greatly improved, the impregnation degree and impregnation efficiency in the later impregnation process are improved, and the physical performance and stability of the wood are improved.

The present invention discloses a method for producing a modified wooden material. Specifically disclosed is a method for producing a modified wooden material, said method comprising: 1) a step for causing permeation, into a wooden material, of a 5-hydroxymethylfurfural (5-HMF) resinification solution containing 5-HMF and an inorganic salt for promoting polymerization of the 5-HMF; and 2) a step for polymerizing the 5-HMF of the permeated 5-HMF resinification solution in the wooden material by means of heating.

The invention discloses a polyethylene glycol complex liquid for reinforcing water-saturated bamboo and wood cultural relics and a preparation method of the polyethylene glycol complex liquid. The polyethylene glycol complex liquid is prepared from polyethylene glycol, water-soluble amino siloxane, phenylboronic acid derivatives and a solvent. The total mass percent concentration of the polyethylene glycol and the water-soluble amino siloxane is 10%-60%, and the mass percent concentration of the phenylboronic acid derivative is 0.01%-1%; wherein the mass ratio of the polyethylene glycol to the water-soluble amino siloxane is (1: 1)-(8: 1). According to the method, the size stability of the bamboo-wood cultural relics in the reinforcement treatment process is improved, the shrinkage rate of the reinforced bamboo-wood cultural relics in the natural drying process is greatly reduced, and safe dehydration and shaping of the medium-high-degradation saturated bamboo-wood cultural relics are achieved.

A part made from lignocellulosic material (10) is formed from a single sheet (11) of partially delignified lignocellulosic material impregnated with an impregnation polymer. The part (10) comprises at least one curved portion having a double curvature surface. The part made from lignocellulosic material is produced by a production method implementing a thermoforming step. Use in particular for producing wood veneer structures.

This wood composite material comprises: an inner layer that includes wood and resin; an obverse layer provided on the obverse surface of the inner layer, the obverse layer including wood and resin; and a reverse layer provided on the reverse surface of the inner layer, the reverse layer including wood and resin. The total of the filling rate of the obverse layer and the filling rate of the reverse layer is no greater than half the filling rate of the wood overall.

The present invention relates to a method for obtaining a ligno-cellulosic composite material, a ligno-cellulosic composite material that can be obtained by this method, and the use of this ligno-cellulosic composite material.

The invention relates to the technical field of bamboo product processing, in particular to a bamboo product processing method which comprises the steps that moso bamboos are transversely cut into bamboo sections, and then the bamboo sections are processed and formed to obtain bamboo blanks; bamboo fiber chippings generated during moso bamboo processing are collected, and the bamboo fiber chippings are crushed after being cleaned and subjected to impurity removal; preparing a compound liquid which comprises a compound enzyme of xylanase and cellulase, drying the bamboo blank until the water content is 10-12%, and engraving the area, needing to be subjected to laser engraving, of the bamboo blank by using a laser engraving machine; coating or spraying the composite liquid on the surface of the laser engraving area; bamboo fiber scraps in the bamboo processing process are collected, and then raw materials are crushed, so that bamboo fibers are recycled; a compound enzyme degradation product of xylanase and cellulase is used as a precursor of the repair material; the nano bamboo cellulose and the sodium hyaluronate form a net structure under the action of enzyme, and the nano bamboo cellulose is combined with the degradation product to form a new cross-linking point to fill the crack.

The invention discloses a smoke-suppressing low-toxicity flame-retardant floor board and a preparation method thereof. The method comprises the steps that S1, wood is placed in a mixed solution of imidazole diethyl phosphate and a Lewis acid catalyst, vacuum impregnation and heating and pressurizing impregnation are sequentially conducted, and the wood is drained after impregnation; the wood is sequentially placed in a chitosan solution, a metal salt solution and an alkaline solution to be subjected to pressure dipping, and complexing flame retardant modified wood is obtained after draining and washing; and S2, the complex flame retardant modified wood is soaked in a water-soluble charring agent solution, drained after being pressurized and soaked, washed with water and dried, and the flame retardant modified wood is obtained. The imidazole diethyl phosphate is obtained by carrying out condensation reaction on 1-(3-aminopropyl) imidazole and (formyl methyl) diethyl phosphate in a mass ratio of (0.5-0.7): 1. The problems that a current floor board is poor in flame retardant property durability, high in smoke density and low in carbon residue amount can be effectively solved.

The invention relates to a method for producing a coated wooden component that has biological protection against infestation by wood-destroying and / or wood-staining fungi, based on impregnation or pretreatment with a pre-culture and / or with spores of a fungus, in particular of the genus Trichoderma, that acts antagonistically towards wood-destroying and / or wood-staining microorganisms. The invention further relates to a wooden component produced by the method and its use as a building material in building construction, particularly in exterior applications.

The plant material may be infiltrated with a solution having a stabilizer and / or a stabilizer precursor. The stabilizers and / or precursors may be absorbed within amorphous and / or hemicellulosic regions of the cell wall of the plant material. After permeation, the amorphous cellulose and / or hemicellulose may be cross-linked with the stabilizer. The stabilizer precursor may include a nucleophilic agent and an electrophilic agent, and the stabilizer may include a reaction product of a nucleophilic agent and an electrophilic agent. Each of the stabilizer and / or the precursor may have a molecular weight of less than or equal to 500 g / mol during permeation. After cross-linking, the stabilizer may impart higher water stability to the plant material, in particular, to limit swelling of the plant material regardless of the duration of exposure to water and / or the amount of water absorbed by the plant material.

This invention discloses a Litsea cubeba essential oil preparation, which is prepared by mixing a 1% (w / w) chitosan quaternary ammonium salt solution with a Litsea cubeba essential oil ethanol mixture at a volume ratio of 4:1; the volume ratio of Litsea cubeba essential oil to anhydrous ethanol in the Litsea cubeba essential oil ethanol mixture is 2:3. The Litsea cubeba essential oil preparation prepared by this invention exhibits good dispersibility and stability, achieving 100% short-term and long-term antibacterial effect against Aspergillus flavus. This is significantly superior to using Litsea cubeba essential oil or chitosan quaternary ammonium salt alone, as well as other chitosan quaternary ammonium salt-Litsea cubeba essential oil preparations, and even more superior to commonly available antifungal agents. Its preparation method is simple, non-toxic, harmless, and does not pollute the environment. It has low production costs and can be used to prevent or inhibit the growth of Aspergillus flavus, reducing its damage to wooden household products.

The present invention belongs to the technical field of wood composite materials, and relates to flexible veneer, flexible wood-based triboelectric materials, and preparation methods and applications thereof. In view of the technical problems in the prior art that wood-based triboelectric materials lack flexibility, are difficult to adapt to complex usage environments, and have poor electrical performance, the present application provides a method for preparing flexible veneer, comprising the following steps: S1: slicing wood along the fiber direction of the wood to obtain slicing veneer; S2: delignifying the slicing veneer to obtain delignified veneer; S3: immersing the delignified veneer in cationic polyelectrolyte and anionic polyelectrolyte solutions in turn, removing the unreacted polyelectrolyte solution, and then immersing it in a crosslinker solution to obtain crosslinked veneer; S4: placing the crosslinked veneer in a MXene solution, removing the unreacted MXene, and drying to obtain flexible veneer. The prepared flexible veneer can be used for the preparation of flexible wood-based triboelectric materials, taking into account both mechanical properties and triboelectric properties.

The invention discloses a color laminated board production process based on ultrahigh pressure dipping coloring, and belongs to the technical field of artificial board manufacturing. Firstly, high-temperature heat treatment is conducted on a wood veneer, and the pore structure of the wood veneer is optimized; then preparing a functionalized colored resin adhesive containing nanoscale coloring; the key step adopts a synergistic ultrahigh-pressure impregnation technology, so that resin deeply permeates into a wood cell wall layer, and coloring and reinforcing are integrated; and finally, the dipped wet-state veneer is subjected to one-time forming in a directional assembly and hot pressing process. Traditional dyeing and intermediate drying links are thoroughly omitted, dyeing wastewater is completely eradicated from the source, the process is remarkably shortened, and energy consumption is reduced. The obtained product has excellent physical and mechanical properties, extremely high dimensional stability and lasting color weather resistance, and is suitable for manufacturing high-end outdoor building materials and furniture.

The invention discloses a waterproof and moistureproof coating for a floor and a waterproof wood floor. The waterproof and moisture-proof coating for the floor comprises the following components in parts by weight: 8-10 parts of sodium methyl silicate, 17-27 parts of organic silicon resin, 18-24 parts of methyl cycloalkane, 8-12 parts of microcrystalline wax, 10-14 parts of a surfactant, 6-11 parts of a coupling agent, 2-8 parts of an inorganic additive, 21-25 parts of a mixed solvent and 9-15 parts of an auxiliary additive. The waterproof and moisture-proof coating can improve the structural stability in a humid environment and the protection effect on a floor, so that a waterproof wood floor has good structural stability in the humid environment for a long time.

In some embodiments, a material comprises a contiguous block of chemically-modified wood infiltrated with an index-matching polymer. The contiguous block has a first section that is substantially transparent to light and a second section that is translucent or opaque. The first section can have a lower lignin content than the second section. Alternatively, the first section can have a chromophore state altered from that of the wood in its natural state, and the lignin in the second section can retain a chromophore state of the wood in its natural state. In some embodiments, a material comprises a section of wood chemically-modified such that chromophores of lignin within the wood in its natural state are altered or removed, and the section retains at least 70% of the lignin of the wood in its natural state. Methods for forming such materials are also disclosed.

The invention discloses a preparation method and application of self-healing wood, and belongs to the technical field of wood processing. The preparation method of the self-healing wood comprises the following steps: firstly, synthesizing a polymer containing a steric hindrance urea bond, taking hydroxyl-terminated polymer dihydric alcohol, diisocyanate and N, N '-di-tert-butylethylenediamine as raw materials, and carrying out prepolymerization, chain extension and grafting to obtain the self-healing wood; secondly, delignification treatment is conducted on the wood twice, specifically, the wood is treated with a sodium sulfite / sodium hydroxide solution at the temperature of 80-100 DEG C for 4-8 hours and then treated with a hydrogen peroxide solution at the temperature of 70-90 DEG C for 4-8 hours; and then the wood is subjected to vacuum impregnation with a polymer for 8-24 h, curing is conducted at the temperature of 70-90 DEG C, hot-pressing reinforcement is conducted at the temperature of 80-100 DEG C and the pressure of 10-20 MPa, and the self-healing wood is obtained. Through reaction of isocyanate groups on large-steric-hindrance urea bonds and hydroxyl groups on cellulose, medium-temperature efficient repairing is achieved, the compressive strength can be restored to the original wood standard level, the strength improving effect is achieved, and the method is suitable for the fields of wood repairing and bearing wood components.

The invention relates to methods for preparing modified wood and wood products, including methods to fortify wood by increasing the strength and / or density of wood so as to yield a fortified wood or wood product. The methods can be used to, for example, improve the performance, alter the appearance, and / or improve the durability of wood, and particularly, solid wood. The methods comprise a combination of resin and thermal treatments to yield modified wood and modified wood products.

The invention relates to a preparation method of a transparent wood packaging film, in particular to a preparation method of a full-bio-based transparent wood film with a full-green process. The technical problems that existing transparent wood is poor in biodegradability, poor in waterproofness, complex in manufacturing process, toxic in reagent and poor in barrier property are solved. The method comprises the steps that after wood is bleached, pores of the wood are filled with a mixed solution of citric acid and sodium carboxymethyl cellulose through vacuum impregnation, and a uniform and compact structure is constructed; the transparency of the transparent wood film is 18%-30%, the haze is 65%-85%, the strength reaches 74-80 MPa, the water vapor transmission rate is (3.5-4.5) * 10 <-10 > g m <-1 > s <-1 > Pa <-1 >, and the transparent wood film has good water resistance and dimensional stability, is biodegradable and can be used in the field of food packaging.