208results about "Lignin adhesives" patented technology

This disclosure relates generally to chemical engineering, and, more specifically, to an improved method and apparatus for recovering lignin from biomass, including using organic solvents, such as methanol, to explosively separate lignin from cellulosic materials, and the harvesting of all of the resulting products. Additionally, the present technology relates to improved uses for the harvested products, including composite board and resin binder systems.

The invention discloses a lignin-inorganic oxide composite binder, preparation thereof and application of the lignin-inorganic oxide composite binder in a hard carbon negative electrode. The preparation method comprises the following steps: firstly, carrying out quaternization modification on lignosulfonate to obtain quaternized lignosulfonate, and then utilizing the action of quaternary ammonium and sulfonate of the quaternized lignosulfonate, hydroxyl and inorganic oxyacid radicals of inorganic nano oxide and carboxyl and hydroxyl of sodium carboxymethyl cellulose to prepare the modified lignosulfonate. The lignin-inorganic oxide composite binder with the interpenetrating network structure is formed. According to the binder, sodium carboxymethyl cellulose serves as a hard phase to enhance the mechanical rigidity, quaternized lignosulfonate rich in flexible long chains serves as a soft phase to bear part of loads, and inorganic nano oxide rich in hydroxyl serves as a crosslinking point or physical filler to enhance the structural stability of the binder. Besides, a multi-network structure formed by hydrogen bond crosslinking not only endows the binder with an excellent ion transmission rate, but also helps to enhance the interfacial compatibility of the binder with an ester electrolyte, thereby significantly improving the rate capability and cycle performance of the hard carbon negative electrode.

The invention discloses a water-resistant broussonetia papyrifera leaf protein wood adhesive and a preparation method thereof, and the water-resistant broussonetia papyrifera leaf protein wood adhesive comprises the following components by weight: 2.4 parts of a protein denaturant I; 0.3 part of a protein denaturant II; 120 parts of a dispersion medium; 30 parts of a broussonetia papyrifera leaf protein extract; and 30 parts of a cross-linking agent. The preparation method comprises the following steps: mixing the protein denaturant I, the protein denaturant II and the dispersion medium, fully dissolving, adding the broussonetia papyrifera leaf protein extract, heating at constant temperature, adding the cross-linking agent into the mixture, and continuously heating at constant temperature for reaction to obtain the water-resistant broussonetia papyrifera leaf protein wood adhesive. The wood adhesive is prepared by taking the broussonetia papyrifera leaf protein as a main raw material, a new raw material source of the biomass-based wood adhesive is developed, the problems of raw material greenization, low cost and sustainable supply are solved, and the economic utilization value of broussonetia papyrifera resources is also remarkably improved; the preparation method is simple, and the prepared broussonetia papyrifera leaf protein wood adhesive has excellent water resistance, mechanical strength and comprehensive performance.

The invention relates to the field of adhesives, and discloses a dialdehyde lignin and dialdehyde protection lignin adhesive as well as a preparation method and application thereof. The method comprises the following steps: adding a dialdehyde solution and acid into the wood biomass and 1, 4-dioxane, and reacting at 75-95 DEG C for 3-7 hours; carrying out solid-liquid separation to obtain a liquid component, adjusting the pH value, and adding the liquid component into water; and carrying out solid-liquid separation to obtain a solid component, and cleaning and drying to obtain the dialdehyde lignin. The preparation method comprises the following steps: dissolving gelatin in an alkali solution, adding borate, nano-hydroxyapatite and dialdehyde lignin, and uniformly dispersing to obtain the dialdehyde protected lignin adhesive. The plywood prepared from the adhesive shows excellent mechanical properties, the wet strength of the plywood is larger than or equal to 1.0 MPa and the dry strength of the plywood is 2.2 MPa under the hot pressing condition of 120 DEG C, the flame retardant property, the heat stability and the moisture-proof stability of the plywood are remarkably improved, and the plywood further has the good mildew-proof characteristic.

The invention discloses a lignin-based strong adhesive prepared from DES pretreated biomass and a preparation method and application thereof.The preparation method comprises the following steps that L-malic acid and beta-cyclodextrin are mixed, heated and stirred till uniform and transparent liquid is formed, and a eutectic solvent system is obtained; mixing biomass with the eutectic solvent system prepared in the step (1), heating and stirring; adding an acetone aqueous solution for quenching reaction, performing vacuum filtration, and collecting filtrate to obtain lignin and DES mixed liquid; and heating and stirring the obtained lignin and DES mixed liquid until the mixed liquid is thick to obtain the lignin-based adhesive. Compared with the existing lignin-based adhesive, the adhesive prepared by the method does not release formaldehyde and is green and environment-friendly. And the material has the advantages of extremely strong mechanical property, wide temperature adaptability, capability of being used for various materials, solvent corrosion resistance and the like. The method can be widely applied to the fields of furniture manufacturing, aerospace and the like.

The invention discloses a UV photocuring adhesive, a preparation method thereof and an application of the UV photocuring adhesive in the electronic field, and relates to the field of adhesives. The preparation method comprises the following steps: when the UV photocuring adhesive is prepared, carrying out a reaction on dihydroxyl modified 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, p-phenylene diisocyanate, polyethylene glycol and 2-ethyl-4-methylimidazole, so as to obtain imidazole-terminated isocyanate, and carrying out a reaction on the imidazole-terminated isocyanate and the 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, so as to obtain the UV photocuring adhesive. The modified lignin, butanediamine and N, N '-methylene bisacrylamide are subjected to a reaction, and a double-bond reactant is prepared; the preparation method comprises the following steps: reacting epoxy-terminated siloxane with octamethylcyclotetrasiloxane, tetramethyltetravinyl cyclotetrasiloxane and tetramethylammonium hydroxide to obtain modified siloxane, and finally, uniformly mixing imidazole-terminated isocyanate, a double-bond reactant, modified polysiloxane and benzoin butyl ether to obtain the polyurethane adhesive. The UV light-cured adhesive prepared by the invention has good adhesive property, anti-aging property and flame retardant property.

According to the present invention, there is provided a method for the production of an adhesive, said method comprising the following steps: a) providing lignin rich carbohydrate complexes (LCC) by pressurized hot water extraction of softwood biomass, preferably biomass of Norway spruce or Scots pine, or of hardwood biomass, preferably biomass of Birch or Beech, providing bark lignin rich carbohydrate complexes (BLCC) by pressurized hot water extraction of softwood bark, preferably bark of Norway spruce or Scots pine, or providing liquefied biomass by acid-catalyzed liquefaction of biomass including wood saw dust, agricultural residues, plant stalks, recycle carton boards, recycle paper, recycle wood, wood panels, and wood bark side streams, in polyhydric alcohols and phenols; b) reacting the LCCs, BLCCs, or liquefied biomass obtained in step a) with a crosslinking or catalytic agent selected from the group consisting of: carboxylic agents including citric acid, dicarboxylic acids including adipic acid, organic acid anhydrides, tannin, tannic acid, plant derived fatty acids including suberin, and hexamethylenediamine, in order to produce said adhesive. The present invention is also directed to an adhesive produced by the method of the invention and to the use thereof as a bonding agent in wood products or as a coating agent in wood products or mineral wool.

The invention discloses a formaldehyde-free adhesive as well as a preparation method and application thereof, and belongs to the technical field of adhesive preparation. The formaldehyde-free adhesive is prepared from the following raw materials in parts by weight: 80-150 parts of a modified lignin solution, 10-30 parts of a polyurethane emulsion, 15-35 parts of a curing agent, 6-12 parts of a modified filler and 5-15 parts of a flame retardant. The formaldehyde-free adhesive provided by the invention is formaldehyde-free and high in environmental protection property; the flame-retardant artificial board has certain flame retardance, excellent mechanical properties and good comprehensive performance, is suitable for the preparation process of the artificial board, and has a certain application prospect.

The present invention relates to a process for preparing a bonding resin, lignin in solid form or in the form of a dispersion in water is mixed with a crosslinker; and optionally one or more additives followed by addition of a basic solution. The bonding resin is useful for example in the manufacture of laminates, mineral wool insulation and wood products such as plywood, oriented strandboard (OSB), laminated veneer lumber (LVL), medium density fiberboards (MDF), high density fiberboards (HDF), parquet flooring, curved plywood, veneered particleboards, veneered MDF or particle boards, laminates or mineral wool insulation.

A method for manufacturing an insulation product including mineral fibers or natural organic fibers bound by an organic binder, the method including (a) applying a sizing composition to the mineral fibers or the natural organic fibers, (b) forming an assembly of the mineral fibers or the natural organic fibers, (c) heating the assembly of the mineral fibers or the natural organic fibers until the sizing composition has cured, wherein the sizing composition includes at least one lignin, which is potentially oxidized, and at least one non-polymeric polycarboxylic organic acid.

The invention discloses a preparation method of a shaving board lignin-based biomass formaldehyde-free adhesive, and relates to the technical field of environment-friendly adhesives, the preparation method comprises the following steps: step 1, mixing animal collagen and inorganic base, and carrying out ultrasonic treatment to obtain activated protein; step 2, mixing and stirring the modified activated lignin, activated protein and an amino resin cross-linking agent in a mass ratio of (42-50): (17-23): (5-20) for 10-30 minutes, and controlling the stirring temperature to be 30-45 DEG C to obtain an initial material of the formaldehyde-free adhesive; and step 3, adding the functional additive into the formaldehyde-free adhesive initial material, and carrying out heat treatment and stirring to obtain the functional formaldehyde-free adhesive. The formaldehyde-free environment-friendly adhesive has the effect of remarkably improving the bonding strength while being formaldehyde-free and environment-friendly.

A method of growing plants in a coherent growth substrate product can comprise: providing at least one coherent growth substrate product comprising man-made vitreous fibres (MMVF) bonded with a cured aqueous binder composition free of phenol and formaldehyde; positioning one or more seeds, seedlings, cuttings or plants in contact with the growth substrate product; and irrigating the growth substrate product. The aqueous binder composition prior to curing can comprise; a component (i) in form of one or more lignosulfonate lignins having a carboxylic acid group content of 0.03 to 1.4 mmol / g, based on the dry weight of the lignosulfonate lignins; and a component (ii) in form of one or more cross-linkers.

The invention relates to a Façade system for a building, in particular an External Thermal Insulation Composite System (ETICS), comprising a thermal and / or acoustic insulation, consisting of at least one insulation element being a bonded mineral fibre product made of mineral fibres, preferably stone wool fibres, and a cured aqueous binder composition, whereby the insulation element is fixed to an outer surface of the building by mechanical fastening elements and / or an adhesive, covered with a rendering, and whereby the aqueous binder composition prior to curing comprises a component (i) in form of one or more oxidized lignins, a component (iia) in form of one or more modifiers, and whereby the insulation element has a bulk density between 70 kg / m3 and 150 kg / m3.

A polymer blend material comprising the following components: (i) a lignin component; (ii) a nitrile butadiene rubber component; and (iii) a filler component comprising ceramic particles and / or carbon particles having an average primary particle size of 1-100 nm, wherein component (iii) is present in an amount of 0.1-10 wt % by weight of components (i) and (ii); wherein component (i) is present in an amount of about 5 wt % to about 95 wt % by weight of components (i) and (ii), and wherein the blend material may optionally include a PAN-containing homopolymer or copolymer as an additional component. Methods for producing the polymer blend, molded forms thereof, and articles thereof, are also described. Methods for bonding surfaces together by use of the polymer blend are also described.

The present invention relates to a method for preparing a bonding resin, in which lignin is provided in the form of an ammonia and / or organic base solution and mixed with one or more crosslinking agents and, optionally, one or more additives. The bonding resin is useful, for example, in the production of laminates, mineral wool insulation, and wood products such as plywood, oriented strand board (OSB), laminated veneer lumber (LVL), medium density fiberboard (MDF), high density fiberboard (HDF), parquet flooring, curved plywood, veneered particleboard, veneered MDF, or particleboard. The bonding resin is also useful, for example, in composites, molding compounds, and foundry applications.

The present invention relates to a method for preparing a thermosetting binder composition, comprising the following steps: - mixing at least one lignin, at least one organic monocarboxylic or sulfonic acid, and at least one organic non-polymeric polycarboxylic acid; and - heating said mixture at a temperature of between 90°C and 170°C, preferably between 110°C and 150°C, for a duration of between 5 seconds and 5 minutes, preferably between 15 seconds and 1 minute, so as to form at least one water-soluble or water-dispersible lignin ester. The present invention also relates to a thermosetting binder composition that can be obtained by such a method, said binder composition containing at least one water-soluble or water-dispersible lignin ester, at least one residual lignin, at least one free residual organic non-polymeric polycarboxylic acid, and at least one free residual organic monocarboxylic or sulfonic acid. The present invention also relates to a method for manufacturing an insulation product comprising mineral fibres or natural organic fibres using a thermosetting binder composition as obtained previously, but diluted in water, and to an insulation product that can be obtained by the above-mentioned manufacturing method.

The present invention discloses a bonding method for a high-strength plywood with a low sizing amount based on a lignin formaldehyde-free adhesive, belonging to the technical field of adhesives. In the present invention, a lignin-based formaldehyde-free adhesive is used to bond veneers, and the single-sided sizing amount is not more than 80 g / m<supgt;2< / supgt>. After hot pressing and curing, the bonding strength of the obtained high-strength plywood is not less than 0.7 MPa; the lignin-based formaldehyde-free adhesive is prepared by separating and treating lignocellulosic raw materials or kraft lignin with a mixed solution. The adhesive of the present invention can reach a dry strength of 0.9 - 1.3 MPa and a class II wet strength of 0.8 - 1.0 MPa after bonding three-layer poplar veneers; the elastic modulus and static bending strength after bonding five-layer plywood are significantly higher than 5500 MPa and 32 MPa; the plywood manufactured by the method of the present invention far exceeds the plywood bonded with industrial urea-formaldehyde resin glue, and the bonding strength is equivalent to that of industrial-grade phenolic-bonded plywood.

The disclosure relates to a roofing system for a flat roof or a flat inclined roof of a building with a thermal and / or acoustic insulation, consisting of a structural support, a deck, optionally a vapour control layer, a waterproof membrane and at least one insulation element being a bonded mineral fibre product made of mineral fibres, preferably stone wool fibres, and a cured aqueous binder, whereby the cured aqueous binder prior to curing comprises a component (i) in form of one or more oxidized lignins, a component (ii) in form of one or more cross-linkers, a component (iii) in form of one or more plasticizers, and whereby the insulation element has a bulk density between 70 kg / m3 and 250 kg / m3.

The present invention relates to an improved process for preparing an aqueous dispersion of lignin and the use of said suspension in the preparation of a resin.

The invention relates to the technical field of lithium batteries, in particular to a composite aqueous binder and application thereof to a lithium-rich manganese-based material. The preparation method of the composite aqueous binder comprises the following steps: S1-1, mixing and stirring a carboxymethyl chitosan solution and polyvinylidene fluoride to obtain a PC solution; s1-2, humic acid is added into the PC solution, deionized water is added for dilution until the solid content is 4-6 wt%, and the composite water-based binder is obtained. The composite aqueous binder and the lithium-rich manganese-based material are jointly used for preparing the positive electrode slurry. And the preparation of the positive electrode slurry comprises the following steps: S2-1, mixing and stirring the lithium-rich manganese-based material, the conductive agent and the composite aqueous binder, adding N-methyl pyrrolidone, and grinding to obtain the positive electrode slurry.

There is provided a release agent composition containing an aqueous solvent, that is, a release agent composition for forming a release agent layer that can be released by light irradiation and is used for a laminate, in the laminate in which a support substrate and a semiconductor substrate or an electronic device layer can be firmly adhered to each other during processing of the semiconductor substrate or the electronic device layer, and the support substrate and the semiconductor substrate or the electronic device layer can be easily separated from each other by light irradiation after the substrate processing. There is provided a release agent composition for light irradiation release for forming a release agent layer of a laminate which includes a semiconductor substrate or an electronic device layer, a light-transmissive support substrate, and a release agent layer provided between the semiconductor substrate or the electronic device layer and the support substrate, in which the electronic device layer includes a plurality of semiconductor chip substrates and a sealing resin disposed between the semiconductor chip substrates, and which is used for releasing the semiconductor substrate or the electronic device layer from the support substrate after the release agent layer absorbs light irradiated from the support substrate side, in which the release agent composition contains a light-absorbing compound that contributes to making the semiconductor substrate or the electronic device layer and the support substrate easily released by absorbing the light, and a solvent, and the solvent contains water.

The invention discloses a preparation method of a lignin biomass adhesive, the lignin biomass adhesive and plywood. The preparation method comprises a lignin activating treatment step and a mixing step. The lignin activating treatment step comprises the step of mixing water, sodium hydroxide, polyacrylamide and lignin and activating to obtain an activating solution. In the mixing step, the activating solution and the phenolic resin glue are uniformly mixed, the lignin biomass adhesive is obtained, and the adding amount of the activating solution is smaller than or equal to 60% of the weight of the phenolic resin glue. According to the preparation method of the lignin biomass adhesive, the prepared lignin biomass adhesive is high in environmental protection property, can reach performance indexes of first-class plywood, and is low in cost.

The invention discloses a preparation method of a bio-based binder based on a lithium-sulfur battery in the technical field of lithium-sulfur batteries, which comprises the following steps: S1, selecting a natural polymer material as a matrix material, purifying the selected matrix material, and modifying according to actual requirements; s2, uniformly mixing the modified matrix material with a reinforcing component; s3, adding a cross-linking agent into the mixed system to carry out a cross-linking reaction; s4, water and a low-toxicity organic solvent are adopted as dispersion media, the mixed system is dispersed in a selected solvent, and uniform slurry is formed; and S5, coating the prepared binder slurry on an electrode current collector of a lithium-sulfur battery, and then carrying out drying treatment to obtain the bio-based binder. According to the invention, a natural high polymer material is adopted as a matrix, so that the dependence on petroleum-based raw materials is reduced, the environmental pollution in the production process is reduced, and the concepts of green chemistry and sustainable development are met.