46results about How to "Reduce hydrophilic groups" patented technology

The invention discloses a biochar-based plastic film material and a preparation method thereof. The biochar-based plastic film material is prepared by mixing the following raw materials in parts by weight: 20-40 parts of modified biochar, 40-60 parts of polyethylene, 1.5-2 parts of dispersing agent and 1-2.5 parts of coupling agent. According to the invention, the biochar is combined with plastic by a modification technology, to reduce the dosage of the plastic in agriculture and accelerate the decomposition course to plastic products so as to achieve the purpose of protecting the environment.

The invention relates to organic silicone modified acrylate emulsion and a preparation method thereof. The organic silicone modified acrylate emulsion is synthesized through a hard monomer, a soft monomer, a cross-linking monomer, an organic silicone monomer and a reactive emulsification monomer under the action of an initiator at one time; the preparation method comprises the following steps: dissolving the initiator into deionized water; uniformly mixing the hard monomer, the soft monomer, the cross-linking monomer and the organic silicone monomer in a premixing tank; adding an emulsifier and deionized water into a four-mouth flask to be heated to 70-90 DEG C, slowly dropwise adding the uniformly-mixed monomer mixed phase and 90% of an initiator solution for 1-3 h at the temperature of 70-90 DEG C and the rotating speed of 200-400 r/min, carrying out heat preservation for 1-3 h at the temperature of 70-90 DEG C after dropping, meanwhile, dropwise adding 10% of the residual initiator solution, and adding ammonia water for adjusting the PH to 6-8 after cooling to 50 DEG C or below. The migration of the emulsifier in a latex film is avoided through application of the reactive emulsifier and the defects of hot sticking and cold shortness of the pure acrylic resin are overcome through organic silicone modification.

The invention discloses a production method for a fireproof, flame-resistant, medium-density fiber closet plate. The method comprises the steps of (1) preprocessing of raw materials, (2) screening, (3) steaming and boiling for softening, (4) grinding, (5) sizing and drying, (6) prepressing, (7) hot pressing, (8) sawing and sanding, (9) veneering and hot pressing and (10) edge cutting. In this way,a finished product is obtained. The method disclosed by the invention is characterized in that eucalyptus barks and branches and waste leftover bits and pieces left after panel manufacture are takenas main raw materials, other miscellaneous wood is added and waste is recycled, so wood resources can be utilized fully and effectively; and modified paraffin and flame-resistant urea-formaldehyde resin adhesive are added, so resistance of the product to fire and flame is greatly enhanced. The medium-density fiber cabinet plate is highly resistant to fire, flame and water and low in the content offormaldehyde, so the product is a safe and environment-friendly closet plate.

The invention discloses a method for preparing a silk fibroin sodium alginate composite fiber and belongs to the technical field of natural macromolecule composite materials. The method comprises thefollowing steps: firstly, mixing, stirring and dissolving silk fibroin with water, performing dialysis, and performing centrifugal separation so as to obtain a pretreated silk fibroin solution; mixingelastinase and the pretreated silk fibroin solution, adjusting the pH value, and performing constant-temperature stirring enzymolysis so as to obtain enzymatic hydrolysate; mixing phospholipid with the enzymatic hydrolysate, performing ultrasonic dispersion, further adding sodium alginate, plant essential oil and monosaccharide, performing a constant-temperature stirring reaction so as to obtaina reaction liquid, mixing the reaction liquid with Carbomer, performing a constant-temperature stirring reaction so as to obtain a spinning solution, performing vacuum defoaming, spinning, washing with water, and performing traction, coiling and drying, thereby obtaining the silk fibroin sodium alginate composite fiber. The silk fibroin sodium alginate composite fiber prepared by using the methodhas good mechanical properties.

The invention discloses a production method of a special highly-moisture-proof intermediate-density fiber board for an office table. The method comprises the following steps: (1) preprocessing raw materials; (2) screening; (3) digesting to soften; (4) grinding; (5) applying glue, and drying; (6) pre-pressing; (7) thermally pressing; (8) sawing and sanding; (9) clinging to the surface, and thermally pressing; and (10) cutting the edge to obtain the special board for the office table. According to the method, eucalyptus bark, branches and waste leftovers in board manufacturing are treated as main raw materials; miscellaneous woods such as pine wood, basswood, briar wood, fraxinus mandshurica, beech wood, acer mono wood and lauan wood are added; the wastes are turned into treasures; and the wood resource is fully effectively utilized; hydrogenated rosin and thiourea are added to a moisture-proof urea resin adhering agent, so that the board has the advantages of being environmentally friendly, low in formaldehyde, and outstanding in moisture-proofing performance. The board is outstanding in moisture-proofing performance, high in water resistance, low in formaldehyde content, high in intensity, and high in durability, and is a safe and environmentally-friendly board.

The invention discloses a preparation method of a styrene-acrylic emulsion surface sizing agent. The method is characterized by comprising the following steps: (1) selecting raw materials; (2) preparing a pre-emulsion; (3) preparing a seed emulsion; (4) polymerizing an outer layer; and (5) preparing a sizing liquid. A traditional emulsifier is replaced with a reactive emulsifier acrylamido isopropyl sodium sulfonate in raw material selection; the reactive emulsifier can be bonded to a polymer in a manner of a covalent bond when playing an emulsifying role, so as to become one part of the polymer; emulsifier migration in a film-forming process or desorption of the emulsifier from polymer particles is avoided; hydrophilic groups on the surface of a latex film are greatly reduced; the polymer has relatively good water-resisting property; and the water-resisting property and stability of the styrene-acrylic emulsion surface sizing agent are improved.

The invention relates to complexed shavings and a complexed shaving board and manufacture methods thereof, and belongs to the technical field of processing of artificial boards. The complexed shavingboard is composed of the complexed shavings and an adhesive, a plant polyphenol metal salt complex is introduced into the complexed shavings, and metal ions are fixed on the surface of the shavings and in cell walls, cell cavities and/or cell gaps, so that not only can the color of the shaving board be changed effectively, but also the waterproof performance, corrosion resistance, mildew resistance and other properties of the shaving board can be increased.

The invention relates to the technical field of outer wall space decoration materials, in particular to a spraying process for water-resistant white true stone paint. The spraying process comprises the following steps: (1) base treatment: cleaning disintegrating slag and dirt on a wall; (2) scratching a filling material; (3) arranging a cutting line; (4) spraying a primer: spraying a colored primer, wherein the color of the primer is consistent to that of a finishing coat and a black primer is sprayed to the cutting line; (5) spraying the finishing coat: after the primer is dried and cured, polishing the surface of the primer, and spraying the finishing coat after dust cleaning; and (6) spraying finish-coat paint: after the finishing coat is dried and cured, polishing the finishing coat, then cleaning dust and spraying the finish-coat paint. After the primer is sprayed, the primer is polished once, a base plane can be smoothened to form an isolating layer, so that ageing of the finishing coat caused by water vapor and alkaline substances in the wall space is avoided. The primer is polished, so that the coarseness of the surface can be improved, and therefore, the finishing coat iscombined with the primer better.

The invention discloses a preparation method of hydrophobic wood, including the steps of: immersing the dried pretreated wood in a nano SiO2/polypropylene wax solution for hydrophobic treatment, infiltrating the nano SiO2/polypropylene wax melt into the wood, then hot pressing, densifying the surface of the wood, and finally removing the SiO2/polypropylene wax on the surface to obtain hydrophobicwood. The preparation method is simple, convenient in operation, short in preparation period, low in cost and good in environmental protection, surface hardness and mechanical properties of the hydrophobic wood are both improved, and the like.

A sludge dehydration curing agent comprises, by mass, 25 to 35 parts of diatomite, 10 to 20 parts of lignin, 5 to 10 parts of charcoal, 30 to 50 parts of silt and 2 to 8 parts of a slow release fertilizer. A resource utilization method of the sludge dehydration curing agent comprises the following steps: fully mixing the raw materials according to the components to obtain the sludge dehydration curing agent; taking a certain mass of sludge to dredge mud; mixing the sludge dehydration curing agent into the sludge dredging slurry, stirring to fully mix the slurry and the curing agent, and standing; dehydrating and drying the sludge obtained after standing; and maintaining the dehydrated sludge, and using the maintained sludge as greening planting soil. Original organic matters and nutritional ingredients in the sludge can be fully utilized, tail water generated in the sludge dewatering process is high in transparency, the PH ranges from 6 to 9, and the SS content is smaller than 10. The sludge dehydration curing agent hasa good application prospect in the field of lakeside sludge treatment.

The invention discloses a bi-component waterborne woodware waterproof coating and belongs to the technical field of building materials. A preparation method of the coating includes: putting, by weight, 50-60 parts of waterborne polyurethane emulsion, 2-3 parts of mixed enzyme liquid, 3-5 parts of organic acid, 8-10 parts of bacterial cellulose, 5-6 parts of rare earth, 5-6 parts of defoamer, 5-6 parts of thickener, 8-10 parts of modified sodium alginate liquid, 5-6 parts of coated sodium peroxide and 20-30 parts of water into a 3# beaker, and stirring and mixing at rotating speed of 300-500r/min for 30-50min to obtain a component A; putting, by weight, 10-20 parts of ethyl orthosilicate, 10-20 parts of nano alumina powder, 10-20 parts of sodium fluosilicate and 5-8 parts of animal bone powder into a ball mill, and ball mill mixing for 30-50min to obtain a component B; separately packaging the component A and the component B to obtain the bi-component waterborne woodware waterproof coating. The coating has excellent mechanical performance and waterproof performance.

The invention discloses a wear-resistant and high-temperature-resistant vehicle wire material and a preparation method thereof, and relates to the technical field of wire materials. When the material for the wear-resistant and high-temperature-resistant vehicle wires is prepared, modified zinc stannate is used as a flame-retardant component and is blended with polyvinyl chloride; the modified zinc stannate is prepared by grafting oxidized sodium alginate and hyperbranched polyurethane with an epoxy group on zinc hydroxystannate, crosslinking the oxidized sodium alginate into calcium alginate, and finally preparing into aerogel; when the hyperbranched polyurethane is prepared, glycidol is introduced, and the hyperbranched polyurethane with an epoxy group is prepared. The wear-resistant and high-temperature-resistant vehicle wire material prepared by the invention not only has flame-retardant and wear-resistant effects, but also is more flexible.

The invention relates to a urea-formaldehyde resin adhesive for artificial boards and a preparation method thereof. The urea-formaldehyde resin adhesive is prepared from, by weight, 1351-1650 kg of formaldehyde, 900-1500 kg of urea, 131-400 kg of melamine, 10-60 kg of a high-effective water-proofing agent, 3-4 kg of PVA, 29-30 parts of NaOH and 4-5 kg of formic acid. In the formula, the condensation polymerization synthesis degree between hydroxymethyl melamine and hydroxymethyl urea is high under an acidic condition during preparation, so that quantity of hydrophilic groups in the resin is greatly reduced, and heat resistance and water resistance of the hydrophilic group are improved. The urea-formaldehyde resin adhesive has further reinforced non-melting and non-dissolving three-dimensional structure, so that the adhesive is better in performances.

The invention relates to a styrene-acrylic emulsion surface sizing agent. The sizing agent comprises the following components in percent by mass: 20 to 40 percent of fixed styrene, 1 to 3 percent of crylic acid, 2 to 4 percent of a cross-linking monomer, 2 to 3 percent of an emulsifier, 0.5 to 1 percent of an initiator, 1 to 2 percent of a buffer agent, 1 to 2 percent of a neutralizing agent, 2.5 to 10 percent of oxidized starch, and 35 to 70 percent of water. The emulsifier is acrylamide isopropyl sodium sulfonate. The reaction-type emulsifier acrylamide isopropyl sodium sulfonate is adopted to substitute a traditional emulsifier, the reaction-type emulsifier can be bonded into a polymer in a form of a covalent bond to become part of the polymer while playing a role in emulsification, the migration of the emulsifier or the desorption of the emulsifier from polymer particles in film formation can be avoided, hydrophilic groups on the surface of a latex film can be greatly reduced, the polymer is relatively good in water resistance, and the water resistance and stability of the styrene-acrylic emulsion surface sizing agent can be improved.

The invention discloses a preparation method of a styrene-acrylic emulsion for water-borne wood paint. The method comprises the following steps: firstly, preparing a styrene-acrylic seed emulsion with uniform particle size distribution through miniemulsion polymerization, and then polymerizing a layer of room-temperature self-crosslinking hard shell. The styrene-acrylic emulsion specifically comprises deionized water, an initiator, a co-stabilizer, an emulsifier, styrene, butyl acrylate, methyl methacrylate, hydroxyethyl acrylate and the like, and a proper amount of bi-crosslinking functional monomer is added to modify the styrene-acrylic emulsion. The obtained product has the characteristics of uniform particle size distribution, high transparency, good grindability, good hardness and good tolerance, and is suitable for single-component or double-component wood lacquer.

The invention relates to a high-smoothness papermaking sizing agent and belongs to the field of additives for papermaking. According to the high-smoothness papermaking sizing agent, sodium alginate isactivated firstly and then is treated through a silane coupling agent to improve the surface activity and the performance of polyanions to form hydrogel with a crosslinking network structure, so thatdiffusion and penetration of water liquid are prevented and the hydrogel has good waterproof performance; the silane coupling agent is added so that the surface energy can be reduced, and the surfacestrength and smoothness are further improved; an instable double bond and the like of added oxidized natural rubber can be oxidized into active groups including carboxyl and the like under an oxidization condition of potassium permanganate, so that cells are activated and tissues are regenerated; a reagent B and a plant extracting solution in a composite auxiliary material also can provide needednutrients; the regenerated cells can be filled into a three-dimensional network structure formed by the sizing agent to form a papermaking sizing agent protection layer with a plant cell grade; and the surface strength and smoothness of paper pulp are improved. By adopting the high-smoothness papermaking sizing agent, the problem of a current common papermaking sizing agent that the surface strength and the smoothness are low is solved.

The invention provides an organic enhanced alkali lignin/SBS (styrene-butadiene-styrene) composite modifier as well as a preparation method and application thereof, and belongs to the technical field of asphalt processing. The organic enhanced alkali lignin/SBS composite modifier is prepared from the following raw materials in percentage by mass: 20%-35% of organic enhanced alkali lignin, 47.2%-67.7% of SBS, 0.3%-0.8% of an accelerant and 12%-17% of a compatilizer, the organic enhanced alkali lignin is obtained by taking diphenylmethane diisocyanate, cyclohexylamine and alkali lignin as raw materials to react in tetrahydrofuran. The organic enhanced alkali lignin/SBS composite modifier is used for preparing the anti-aging SBS asphalt, and the anti-aging SBS asphalt is prepared from the following raw materials in percentage by mass: 81.90%-91.98% of asphalt, 8.00%-18.00% of the organic enhanced alkali lignin/SBS composite modifier and 0.05%-0.10% of a stabilizer. The anti-aging SBS asphalt has excellent thermo-oxidative aging resistance and ultraviolet aging resistance.

The invention discloses a production method of a high-moisture-proof and medium-density fiber wardrobe special plate. The production method comprises the following steps of (1) raw materials pretreating, (2) screening, (3) cooking and softening, (4) grinding, (5) gluing and drying, (6) prepressing, (7) hot pressing, (8) sawing and sanding, (9) veneering and hot pressing, (10), edge sealing, and afinished wardrobe special plate is obtained. According to the production method, barks and branches of eucalyptus and waste leftover materials left in the plate manufacturing process are taken as mainraw materials, then pine wood, basswood, birch wood, weeping willow wood, zelkova wood, aceraceae wood, willow wood and the like are added, the waste is changed into wealth, and the wood resources can be fully and effectively utilized; the produced medium-density fiber wardrobe special plate has the advantages of being good in moisture-proof performance, good in water resistance, low in formaldehyde content, high in strength and good in toughness, and the wardrobe special plate is safe, environment-friendly, attractive, wear-resistant and practical.