43results about How to "Increase the binding point" patented technology

The invention discloses a diamond polishing film production method and belongs to the technical fields of grinding materials and grinding tools. The diamond polishing film production method includes that diamond micro-powder is scattered to a binding agent and the surface of a basal film is coated, wherein the diamond micro-powder is washed before scattering till pH (potential of hydrogen) value of washing liquid reaches more than 6.0. The pH value of the surface of diamond is controlled to be near neutral or neutral through washing, binding strength of the diamond micro-powder and the binding agent can be greatly improved, the diamond micro-powder on the polishing film is less prone to falling off during use, and service life of the polishing film can be prolonged.

The invention discloses a preparation method of chromatophilous polyurethane applied to superfine fiber synthetic leather. The preparation method comprises the following steps: firstly mixing polyether polyol with diisocyanate, stirring for reacting, adding a catalyst and taking an aprotic organic solvent as a solvent to prepare a polyurethane prepolymer; mixing an amino-terminated hyperbranched polymer with benzaldehyde, and stirring for reacting to prepare a hyperbranched polymer which is partially protected; subsequently mixing the hyperbranched polymer which is partially protected with the polyurethane prepolymer, and stirring for reacting to prepare hyperbranched polyurethane; finally mixing the hyperbranched polyurethane with a hydrochloric acid alcohol solution, stirring for reacting, washing by ethyl alcohol and acetone after the reaction is ended, drying in vacuum to prepare amino-containing hyperbranched polyurethane. Polyurethane resin synthesized by the amino-containing hyperbranched polyurethane contains active amino, so that the number of active hydrophilic groups is increased; the health performance is improved; the dye integration points are increased; anionic dye is integrated with the amino with positive charge, so that the dyeing effect is improved; the dyeing rate and the dyeing fastness are improved.

The invention discloses hyperbranched polyurethane containing active amino groups and a preparation method thereof. The preparation method comprises the steps that firstly, polyether polyol and diisocyanate are mixed and stirred to react; secondly, a catalyst is added, organic aprotic solvent serves as solvent, and a small-molecule chain extender is added for chain extension after the reaction is performed for a period of time; thirdly, an end-capping reagent is added for partial end capping, so that linear polyurethane pre-polymers are obtained; afterwards, amino-teminated hyperbranched polymers and the linear polyurethane pre-polymers are mixed and stirred to react, so that the hyperbranched polyurethane is obtained. Hyperbranched polyurethane resin obtained by synthesizing the hyperbranched polyurethane contains a lot of active amino groups and imino groups, so the sanitary property of a polyurethane film can be improved, and the dyeing property of the polyurethane film can also be improved.

The invention relates to a method for improving the dyeing property of superfine fiber synthetic leather base cloth. The method comprises the following steps: adding water into gelatin, stirring to enable the gelatin to expand to obtain a gelatin solution, and adding alkaline protease into the gelatin solution for hydrolysis; adding the superfine fiber synthetic leather base cloth into a rotating drum, and treating the superfine fiber synthetic leather base cloth by acid to obtain surface modified superfine fiber synthetic leather base cloth; adding collagen into the rotating drum, performing graft modification on the collagen with the surface modified superfine fiber synthetic leather base cloth, and reacting to obtain collagen modified superfine fiber synthetic leather base cloth; and adding a dye into the rotating drum to dye the collagen modified superfine fiber synthetic leather base cloth. According to the invention, the superfine fiber synthetic leather base cloth is modified by the collagen, so that the superfine fiber synthetic leather base cloth is covalently modified by the collagen, furthermore, the dyeing performance of the superfine fiber synthetic leather is effectively improved, the dye uptake is up to about 94.21%, and the superfine fiber synthetic leather industry can be favorably developed.

The invention relates to the technical field of preparation of auxiliary agents in a papermaking process, specifically to a preparation method for a composite dry strength agent with high bonding strength. According to the invention, cationic starch and cationic polyacrylamide are self-prepared; with the cationic starch as a carrier, the cationic polyacrylamide as a retention aid and polypropyleneand orthosiliconic acid as reinforcements, a reaction is performed, and hydrogen bonding is easily formed among cationic starch molecules and paper fiber molecules, so a reinforcement effect is exerted; meanwhile, charges are mutually attracted, and the cationic polyacrylamide plays retention ability, so the bonding strength between the dry strength agent and the paper fiber molecules is improved, and a polypropylene copolymer can play a certain reinforcement action; and the silicon hydroxyl group of the orthosiliconic acid generates dehydration condensation with the hydroxyl group of the paper fiber, and a stable silicon-oxygen bond is formed to be adsorbed on the surface of the paper fiber, so the bonding strength between the dry strength agent and the paper fiber molecules is further improved, and extensive application prospect is obtained.

The invention relates to the field of constructional engineering, and discloses a foundation pit waterproof curtain and a construction method thereof. The foundation pit waterproof curtain comprises a plurality of water stop columns, wherein the plurality of water stop columns are engaged with one another, reinforcement cages I are pre-buried in the water stop columns, one end of the reinforcement cages I extend to the positions above the top surfaces of the water stop columns, connecting beams are poured among the tops of the plurality of water stop columns, reinforcement cages II are pre-buried in the connecting beams, a plurality of bundles of steel bar groups are inserted into the reinforcement cages II, one end of each steel bar group penetrates through the connecting beams and are located on the side, away from a foundation pit, of the waterproof curtain, and the other end of each steel bar group is located in the foundation pit. The foundation pit waterproof curtain has the effect of reducing deformation of the waterproof curtain caused by side pressure so as to increase the stability of the waterproof curtain.

The invention discloses a polymer composite adhesive, an application thereof, a lithium ion battery anode material prepared based on the polymer composite adhesive and a preparation method, and belongs to the technical field of electrochemistry and new energy materials. The adhesive is dissolved in a dispersion medium to form a solution with concentration of 0.5%-2.0%, wherein the dispersion medium is deionized water, and the mass ratio of a linear polymer to a lamellar polymer is (6-16): (1-4). The lithium ion battery anode slurry using the composite adhesive is prepared from an active material, a conductive agent and the adhesive in a mass ratio of (50-80): (10-30): (10-20). The adhesive is composited from the linear polymer and the lamellar polymer, the polymer composite adhesive can construct a cross-linked three-dimensional network structure around silicon particles, the silicon particles are effectively prevented from irreversible slippage, volume change is buffered, and electrical connection and integrity of electrodes are maintained. The composite adhesive adopts widely sourced raw materials and is green and environmentally friendly.

The invention discloses a connection structure of an architectural window. The connection structure comprises an outer frame, an inner frame, a triangular hinge, outer frame locks and inner frame locks. The outer frame lock on any side is locked to open the other three outer frame locks, all inner frame locks are opened at the same time, a hinged hole A and a hinged hole B are used as axes to rotate and open the inner frame, all outer frame locks and the inner frame locks are opened, the inner frame can be separated from the outer frame, all the outer frame locks and the inner frame locks arelocked, and the inner frame is locked in the outer frame. According to the connection structure, a window is opened in any one of the four directions as required, inserting lock mechanisms are added at the same time under the four directions of the outer frame and the inner frame, joint points of the structure are increased, the combination strength of the structure is enhanced when the lock is dropped, and the disassembly of window inner fans is realized at the same time.

The invention discloses fabric with lasting flower fragrance and a preparation method thereof. The fabric with lasting flower fragrance comprises modified plant fibers and perfume. The compact structure of plant fiber bundles is destroyed by flash explosion treatment, so that lignin and hemicellulose are lost along with treatment, the hardness of the plant fibers is reduced, the specific surface area of the plant fibers is increased, the accessibility and hydrophobicity of the plant fibers are improved, thus polylactic acid molecular chains are tightly attached to the surface of the fabric, the density of the fabric is increased, the perfume is sealed in the fabric, and the loss of the perfume during washing is reduced; bond energy of polylactic acid molecules is improved by acetylation of the plant fibers, so that bonding points between polylactic acid molecular chains are increased, intermolecular hydrogen bonds are generated with adjacent hydroxyl groups while intramolecular hydrogen bonds are formed, thus complex interface bonding grids are formed on the surfaces of the plant fibers, and the wear resistance of the plant fibers is further improved while the tensile strength of the fabric is guaranteed.

The invention discloses a preparation method for a dyeable polyurethane film. The preparation method comprises the following steps: firstly, adding N, N-methylene bisacrylamide and diethylenetriamine into N, N-dimethylformamide to prepare an amino-terminated hyperbranched polymer; terminating the obtained product by using ethanol terminated isophorone diisocyanate; then, adding the terminated product into an N, N-dimethylformamide solution of polyurethane to prepare a casting film solution; pouring the casting film solution on a substrate; dipping in a coagulating bath to form a film by a wet process; and drying to obtain the dyeable polyurethane film. According to the film prepared by the method, as an active group -NH2 is introduced into a component of the film, bonding points of the dye are increased. Moreover, in an acidic solution, the film has positive charges, so that an anionic dye is gradually bonded with amino (P-NH3+) with positive charges in the film by virtue of ionic bonds to play a dyeing effect, thereby improving the dyeing rate and the color fastness. Meanwhile, the method is simple, convenient and feasible to operate, low in requirements on equipment and easy for industrial popularization.

A preparation method of a paper handle agent comprises: (1) taking, by molar percentage, 70-80% of acrylamide, 20-30% of N-methylolacrylamide, 8-15% of glycidyl methacrylate, 0.01-5% of a crosslinking agent and 0.05-5% of a chain transfer agent, and adding them in water while stirring to obtain mixed aqueous solution; introducing nitrogen, adding an initiator and a catalyst, heating to 60-90 DEG C, and polymerizing for 30-90 min to obtain polyacrylamide copolymer; (2) adding suitable organic amine in the product of step (1), carrying out aminomethylation condensation at 60-90 DEG C; cooling the reaction product to 50 DEG C and below, and adding an acid to adjust pH of polymer solution to 6-9; the paper handle agent has the advantages that by adding the handle agent into pulp, finished paper is better in toughness and stiffness and has improved bulkiness and texture.

A pretreatment method for improving the biodegradation effect of walnut shells relates to a pretreatment method for walnut shells. It is to solve the problem that the walnut shell is difficult to biodegrade due to the high content of acid-insoluble lignin. Method: 1. Physical pretreatment: physically grind walnut shells and sieve to obtain walnut shell powder; 2. Chemical pretreatment: add lye to the walnut shell powder after physical treatment; 3. Then filter out the lye solution, washed with distilled water, filtered by suction, adjusted the pH value, dried to constant weight, and completed. The present invention combines physical-chemical pretreatment, the physical pretreatment makes the binding layer of lignin and hemicellulose and cellulose partially destroyed, and the subsequent chemical treatment makes the raw material porous and further increases the internal surface area, which is beneficial to increase the Large lignin contact area with enzymes or other chemicals. Thereby improving the biodegradation effect. The invention is used in the field of natural lignocellulose degradation.

The invention belongs to the field of technologies for processing packaging paper, and particularly relates to a method for preparing high-temperature-aging-resistant natural fiber paper. The method includes preparing mixed pulp from natural color needle leaf wood pulp and broadleaf wood pulp, concentrating the pulp, adding nucleotide solution into the mixed pulp and carrying out soaking and grinding to obtain pulp; concentrating the ground pulp, placing the pulp into a sealing bag and balancing moisture under the low-temperature conditions; sequentially carrying out papermaking, rolling and drying, impregnating adhesive liquid with six-member heterocyclic compounds on the surfaces of paper, drying the paper and carrying out hot-press to obtain the finished high-temperature-aging-resistant natural fiber paper. Compared with the prior art, the method has the advantages that the mechanical strength of the paper can be improved, then the adhesive liquid with the six-member heterocyclic compounds is impregnated on the surfaces of the paper by means of impregnation, the paper is dried and is subjected to hot-press, accordingly, chemical bonds between fibers are connected with one another to form fiber network structures, physical entanglement points between the fibers are increased, the fibers are promoted to be chemically bonded with the adhesive liquid, the strength of the high-temperature-aging-resistant natural fiber paper can be guaranteed, the high-temperature-resistant grade of the high-temperature-aging-resistant natural fiber paper can be upgraded, and the service range of the high-temperature-aging-resistant natural fiber paper can be expanded.