109results about "Pretreatment apparatus" patented technology

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 relates to the technical field of wood, in particular to a multilayer structure insulation laminated wood manufacturing process which comprises the following steps: pretreatment: selecting birch fiber sheets with the thickness of 0.2-0.4 mm, and degreasing, cleaning and drying the birch fiber sheets; flame retardant treatment, wherein the surfaces of the pretreated birch fiber sheets are coated with a flame retardant solvent for 1-3 times through spraying equipment; and preparing impregnation liquid. According to the invention, epoxy resin is further crosslinked with residual hydroxyl of isocyanate resin through ring-opening reaction of epoxy groups to form a three-dimensional interpenetrating network structure, pores of wood fibers are effectively sealed, and an internal ion migration path is blocked, so that the insulativity is improved; meanwhile, the surface activity of the ceramic particles in the functional additive is enhanced after plasma treatment, stronger interface bonding is formed between the ceramic particles and the resin matrix, microcracks and holes at the interface are reduced, the breakdown risk caused by local electric field concentration is avoided, and the insulation effect is enhanced.

The invention discloses an MXene modified bamboo-based composite phase change energy storage material, which is characterized in that a Xene modified bamboo parenchyma cell-based packaging framework is used as a packaging matrix, and a phase change material is packaged in the packaging matrix. The preparation method comprises the following steps: (1) preparing the multi-cell-cavity bamboo parenchyma cells; (2) preparing a delignification bamboo parenchyma cell framework; (3) preparing an MXene modified bamboo parenchyma cell-based packaging framework; and (4) preparing the MXene modified bamboo-based composite phase change energy storage material. Compared with the prior art, the composite phase-change material has the following outstanding effects: the polyethylene glycol encapsulation rate of the composite phase-change material is as high as 80%, and the composite phase-change material has good heat storage capacity; the MXene modified bamboo parenchyma cytoskeleton MDBP can improve the flame retardant property of the composite material and reduce the heat release rate, and meanwhile, the carbon residue is increased to 6.1-15.1 w% from 4.28%; the composite phase change material shows good light absorption and heat conversion performance, and the peak temperature reached under the same light source irradiation time is far beyond that of a bamboo-based composite phase change material without MXene modification; the composite phase change material has thermal stability, flame retardance and photothermal conversion performance.

The invention belongs to the technical field of renewable resource utilization and new energy, and relates to a wood-based water photovoltaic power generation material and a preparation method and application thereof.The wood-based water photovoltaic power generation material is prepared by taking natural wood as a raw material, performing chemical modification treatment and combining directional freeze drying and salting-out treatment. The wood-based water photovoltaic power generation material with relatively good mechanical strength is prepared by using the wood-based material as a raw material, the wood-based material has a highly-oriented porous structure, and under the conditions of 25 DEG C, standard atmospheric pressure and relative air humidity RH 30%, a 200-mesh copper mesh is used as an electrode, and the open-circuit voltage of a nano power generation device obtained by assembling in deionized water reaches 110 mV, and the short-circuit circuit reaches 0.74 mA. The material is simple in preparation process and wide in application scene, adopts natural high polymer materials as raw materials, has the environment-friendly advantages of reproducibility and biodegradability, and has a wide application prospect in the field of new energy materials.

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 invention relates to the field of wood modification, in particular to modified wood and a modification method thereof. The method comprises the following steps: (1) drying wood to be modified to constant weight to obtain dried wood; (2) the dried wood is placed in steeping liquor to be treated, and steeped wood is obtained; the steeping liquor comprises any one of steeping liquor I and steeping liquor II; the impregnation liquid I comprises silicate and organic acid I; the impregnation liquid II comprises organic acid II, mixed fatty acid methyl ester and wax. On the premise of ensuring simple operation steps, the porosity of the wood can be reduced, and the dimensional stability, high humidity resistance and salt resistance of the wood can be improved.

The equipment comprises a soaking pool and a conveying frame, the conveying frame is arranged on the right side of the soaking pool, grooves are formed in the front side and the rear side of the interior of the soaking pool, and lifting structures are fixedly connected to the positions, corresponding to the grooves, of the front side and the rear side of the soaking pool; a clamping structure matched with the lifting structure is arranged at the position, located in the soaking pool, of the lifting structure, and a cleaning structure is fixedly connected to the left side of the top of the conveying frame. Through cooperative use of the soaking pool, the conveying frame, the groove, the lifting structure, the clamping structure, the cleaning structure, a driving mechanism, a vertical hole, a folding baffle, a transverse block, a supporting block and a stirrer, the problems that when a floor is soaked, glue and the surface of the floor are not tightly attached due to impurities attached to the surface of the floor, and local glue shortage or bubbles occur are solved; and after impurities are mixed into glue, the uniformity of the glue is influenced, so that the performance of the impregnated floor is inconsistent.

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.

The invention discloses an optimization treatment method for wood for musical instruments. The optimization treatment method comprises the steps of low-temperature forced circulation drying treatment, low-temperature vacuum drying treatment, content regulation and control treatment, accelerated aging treatment and humidity regulation and balance treatment. The accelerated aging treatment comprises high-temperature treatment and low-temperature moisture absorption treatment, the oxygen content of the treatment environment is controlled in the high-temperature treatment process, and the two types of treatment are cyclically alternated for 2-8 times. The method has the advantages of being efficient, environmentally friendly, low in cost, free of additives, capable of keeping the original characteristics of wood and the like, the optimization treatment period of the wood is shortened, and the acoustic performance and the dimensional stability of the wood are further improved while the natural characteristics of the wood are kept to the maximum extent.

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.

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.

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 present invention relates to an improved method for impregnating a porous material, such as wood, more specifically a method in which an active ingredient to be deposited within the porous material is dissolved in condensed carbon dioxide and impregnated in the material

This invention belongs to the field of red oak processing technology, and specifically relates to a processing method for removing red pigment from red oak, comprising the following steps: (I) Weighing 20-35 parts by weight of aminoethanol, 15-25 parts by weight of sodium bicarbonate, 8-15 parts by weight of hydrogen peroxide, 4-8 parts by weight of ammonia, 3-6 parts by weight of tannin, and purified distilled water, and mixing them evenly to obtain a stock solution; (II) Adding the stock solution obtained in step (I) and purified water to a mixing tank in a 1:2 ratio, controlling the temperature inside the mixing tank at 15-30°C, and stirring for 25 minutes to obtain a red pigment removal agent. This invention removes the red pigment from red oak while preserving the original wood texture to the greatest extent, resulting in a more natural and authentic finished product. It solves the problem that traditional bleaching agents easily damage the texture of red oak, destroy the lignin in the wood, and cause the wood to become brittle and deteriorate.

The present invention provides a method for preparing photochromic transparent wood with high sensitivity to sunlight; we applied a new and simple synthesis method, which is based on removing light-absorbing lignin from natural wood. First, a sheet-shaped wood sample with uniform thickness is pretreated, and then the lignin is removed by treatment with sodium chlorite solution and glacial acetic acid. Then, it is ultrasonically treated with distilled water until neutral to obtain a wood sample with the lignin component removed; the sample is dehydrated by ultrasonic solvent replacement using absolute ethanol, isopropyl acetate, and propylene oxide to further obtain a dehydrated wood sample with the lignin component removed; then, we mix a sunlight-color-changing material (OP), prepolymerized methyl methacrylate (PMMA), and polyacrylic acid (PDESP) and directly incorporate them into the delignified wood, and finally cure and polymerize. The present invention has developed for the first time a photochromic transparent wood with high sensitivity to sunlight. The obtained reversible photochromic transparent wood can change from colorless to red rapidly under sunlight in only 1.5 seconds, and can change from red to colorless rapidly in the dark or under visible light in only 2 seconds.

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 present invention relates to thermal or thermo-mechanical treatment of hygroscopic materials to adjust material properties. The present invention relates to an apparatus for modifying hygroscopic materials. The modification apparatus comprises a modification unit (202) and a fluid container (204) coupled to at least one fluid opening (203) via a control valve (205). The modification apparatus is configured to heat the hygroscopic material in the modification unit (202) to extract water from the hygroscopic material and to direct the fluid from the fluid container through the at least one fluid opening (203) into the modification unit (202) in response to opening of the control valve (205). The modification apparatus further comprises a treatment agent (207) that is added to the fluid, such that the treatment agent is absorbed into the hygroscopic material and modifies it. The treatment agent (207) comprises at least one of the following components: preservatives, dyes, pigments, fragrances, deodorants, insecticides, impregnation components, or flame retardants.

The present invention provides a method for preparing a preform for a flame-retardant and smoke-suppressing bamboo fiber composite material. First, a flame retardant aqueous solution is prepared using low-polymerization degree ammonium polyphosphate and nano-magnesium hydroxide. Then, an integrated process of bamboo fiber flame-retardant modification and fiber preform molding is used to attach the flame retardant to the surface and interior of the bamboo fiber to prepare a preform for a flame-retardant and smoke-suppressing bamboo fiber composite material. The preparation of the flame retardant aqueous solution in the present invention allows the flame retardant to fully impregnate the pore structure of the bamboo fiber, giving full play to the flame retardant advantage of ammonium polyphosphate and the smoke suppression advantage of nano-magnesium hydroxide, while making up for the shortcomings of a single flame retardant. The preform obtained by the present invention is used to prepare a flame-retardant and smoke-suppressing bamboo fiber composite material, which is not only beneficial to improving the performance of the bamboo fiber composite material, but also effectively prevents the loss of the flame retardant, making up for the shortcomings of the bamboo fiber composite material in the field of flame retardancy, and meeting the safety requirements in application fields such as automobiles and furniture.

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 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 discloses a coconut shell structure imitating wood buffer material and a preparation method and application thereof.The preparation method comprises the following steps that wood is subjected to delignification treatment and soaked in water, and treated wood is obtained; the end face of the treated wood is subjected to end sealing treatment, and a sodium silicate solution is added for primary dipping treatment; and removing the end sealing material on the end surface of the impregnated wood, adding a polyvinyl alcohol solution, carrying out secondary impregnation treatment, and drying to obtain the wood buffer material with the imitated coconut shell structure. The wood buffer material with the imitated coconut shell structure has the advantages of light weight, high strength, good toughness, excellent buffer performance, excellent flame retardant property, good water resistance and the like, can replace a polystyrene foam material, and is widely applied to the field of product packaging.

The invention provides a method of producing a piece of delignified wood having a porous structure, said method comprising: chemically treating a piece of natural wood to remove at least 90% of lignin from the natural wood while substantially retaining cellulose-based lumina of the natural wood, thereby producing a piece of delignified wood; after the removing, drying the piece of delignified wood by freeze drying or critical point drying, such that the cellulose-based lumina remain open or unobstructed in a cross-sectional view; and after the drying, further chemically treating the piece of delignified wood to be hydrophobic or resistant to weather or salt water, or forming or depositing a coating on exterior surfaces of the delignified wood. The unique microstructure and composition of the delignified wood can provide advantageous thermal insulation properties, among other advantages described herein.

A synergistic aqueous wood preservative composition comprising a copper compound and penflufen. The copper compounds of the compositions of the invention may be soluble, partially solubilized or micronized particles. The penflufen of the compositions of the invention may be solubilized, emulsified or particulate. The wood preservative compositions of the present invention are surprisingly provided as stable dispersions and confer surprising and unexpected resistance to treated wood and wood products.

The present application relates to a kind of melamine urea-formaldehyde resin composite boron salt one-time impregnation solid wood preservative liquid, impregnated wood and the irradiation strengthening process of impregnated wood, first, select boron, calcium (or copper) compound aqueous solution as impregnation liquid, or can contain boron, calcium ion (or copper ion) and melamine urea-formaldehyde resin simultaneously according to specific process preparation mixed solid wood impregnation liquid;Then wood is treated by vacuum pressurized impregnation, impregnated wood can be irradiated according to the need of specific dose with electron beam or other radiation source in humid state;Finally, impregnated wood is dried and treated to obtain finished product;According to the need of selection calcium-boron formula, then colorless preservative liquid of one-time impregnation can be achieved, copper-boron formula then achieves the one-time impregnation preservative liquid of better preservative effect but color.

The invention relates to a preparation method of a formaldehyde-free wood composite material with high color fastness to light, which comprises the following steps: (1) sequentially bleaching, pickling, washing, dyeing and drying wood veneers to obtain dyed veneers; (2) dissolving an anti-ultraviolet aid in an epoxy resin diluent to obtain an anti-ultraviolet solution, blending the anti-ultraviolet solution with the transparent epoxy resin adhesive to prepare an adhesive A, and mixing the adhesive A with a curing agent B to obtain an anti-ultraviolet transparent epoxy resin adhesive; (3) assembling the dyed veneer and a transparent nylon film into a blank, applying glue to two sides of the dyed veneer by using anti-ultraviolet transparent epoxy resin glue, and pressing and slicing to obtain the light-transmitting recombined decorative veneer; and (4) adhering a layer of transparent nylon film on the surface of the light-transmitting recombined decorative veneer by using anti-ultraviolet transparent epoxy resin glue to prepare the formaldehyde-free wood composite material with high color fastness to light. The formaldehyde-free wood composite material with high color fastness to light prepared by the preparation method disclosed by the invention has excellent ultraviolet resistance and high light transmittance, the color fastness grade reaches gray scale card level 5, and meanwhile, integration of decoration and patterned illumination is realized.

The invention belongs to the technical field of floor materials, and particularly relates to a nano-porous crystal net heating material and a preparation method thereof. The composite material is composed of a base material, inorganic nano porous skeleton sol, a nano heating crystal-conductive phase, a bio-based resin binder phase, an interface coupling agent and a curing system. According to the invention, a wood-inorganic nano framework-organic resin interpenetrating and embedded three-dimensional nano porous crystal net is constructed through integrated component design and vacuum pressure impregnation and gradient curing processes; the Fe-Mn-Ti composite oxide and the nitrogen-doped porous carbon dots cooperate with each other, so that uniform surface heating is realized, and local hot spots are avoided; the bio-based binder phase and the coupling agent solve the problems of embrittlement and interface delamination of the inorganic phase, and the structural stability is improved; an anhydride curing system is environment-friendly and free of volatile matters, and has both safety and insulativity; the process ensures that the material is evenly distributed in the thickness direction, endogenous heating and heat preservation functions are achieved, temperature uniformity is remarkably improved, the service life is remarkably prolonged, and environmental adaptability is remarkably improved.

The present application relates to the technical field of wood heat treatment modification, and discloses a combined heat treatment method and device for wood, which sequentially comprises the following procedures: a pretreatment procedure, wherein wood is soaked in an aluminum sulfate solution until the weight gain reaches 10-35%, and pretreated wood is obtained; a heat treatment procedure, wherein the pretreated wood is placed in a temperature condition of 120-160 DEG C for heat treatment for 1-3h, and heat treated wood is obtained; and a post-treatment procedure, wherein the heat treated wood is soaked in a siloxane modified solution for a period of time, dried, and the siloxane modified solution is a mixed solution comprising methyl triethoxysilane and tetraethyl silicate. The method can ensure that the wood treated by the aluminum sulfate catalysis-heat treatment combination has good dimensional stability and thermal stability, and still has relatively high mechanical strength.