209results about How to "Strong hydrogen bonding" patented technology

The invention provides an UV curing coating, a wear-resistant and antifouling coating layer and a mobile phone protection film containing the wear-resistant and antifouling coating layer. The coating comprises, in parts by weight, 10-95 parts of a first prepolymer, 5-60 parts of a second prepolymer, 0.05-8 parts of a polysilazane-based polymer, 0.05-8 parts of a fluorine-containing aid, 1-15 parts of a photoinitiator and 100-300 parts of a solvent, wherein the first prepolymer is a urethane acrylate prepolymer with a functionality degree of 4-8; the second prepolymer is an acrylate prepolymer with a functionality degree of 9-18. The wear resistance of the coating layer formed after curing the UV curing coating can be improved by the first prepolymer and the second prepolymer with high functionality degrees, improvement for the wear resistance of the coating layer and prolonging for the service life of the coating layer are benefited due to the adding of the polysilazane-based polymer and a polar compound, and the good antifouling performance of the coating layer can be ensured, and the reduction of the antifouling performance of the coating layer can be suppressed due to the fluorine-containing aid. The coating layer has both good antifouling performance and wear resistance.

The invention discloses a high-strength viscose fiber and a production method thereof, which are characterized in that the viscose fiber is formed by mixing bacterial cellulose and viscose spinning solution, wherein the content of the bacterial cellulose in the viscose fiber is 1 to 10 percent. The production method comprises the following steps: the flake bacterial cellulose is pre-processed, and then the flake bacterial cellulose after the preprocessing is smashed with a ball milling method to obtain a micro nano-grade bacterial cellulose powder; the bacterial cellulose powder is added into the viscose spinning solution to be uniformly scattered and defoamed to obtain a spinning solution; and the spinning solution is made into a high-strength viscose fiber. The content of the bacterial cellulose in the viscose fiber is 1 to 10 percent. The viscose fiber which is prepared with the production method has high strength, small shrinkage and good elasticity, can be blended and interwoven with cotton, wool and other synthesized fibers to be used for the fields such as top-grade costume fabric and industrial textiles, and the like.

The invention relates to a UV-curable coating used in surface coating for electronic products, which is prepared by the components with the following weight percentage: 10 to 30wt percent of dual-functional polyurethane acrylate, 5 to 40wt percent of multi-functional nuclear hybrid acrylate monomer, 5 to 30wt percent of ethoxylated or propoxylated multi-functional acrylate monomer, 0 to 15wt percent of single-functional monomer, 1 to 6wt percent of photoinitiator, 0 to 5wt percent of modified nano material, 0.1 to 2wt percent of flatting agent, and 10 to 50wt percent of solvent. The UV-curable coating of the invention is widely applicable to the surface coating of electronic products, such as mobile phones, MP3, MP4 and digital cameras, etc, and has the advantages of high wear resistance, high transparency, strong adhesion, high gloss, etc.

A water-soluble polyvinyl alcohol resin filament is provided, which is formed by melt-spinning a material consisting essentially of a water-soluble polyvinyl alcohol resin having a 1,2-diol structural unit represented by the following general formula (1). A nonwoven fabric is also provided, which is produced by using the water-soluble polyvinyl alcohol resin filament. Therefore, the nonwoven fabric is excellent in water solubility at a lower temperature, and substantially free from bubbling during dissolution thereof in water. In addition, a fully saponified PVA can be used for melt-forming. This suppresses emanation of acetic acid odor, thereby improving the working environment.

wherein R¹, R², R³, R⁴, R⁵ and R⁶, which may be the same or different, are each a hydrogen atom or a monovalent organic group, and X is a single bond or a connecting chain.

The invention relates to an ultra-low-expansion fluorine-containing polyimide thin film and a preparation method and application thereof, belongs to the technical field of polyimide, and solves the problem that in the prior art, a linear thermal expansion coefficient of a polyimide thin film in a wide temperature range is not low enough and when the linear thermal expansion coefficient is reduced,other performances of the polyimide thin film are difficult to obtain concurrently. According to the ultra-low-expansion fluorine-containing polyimide thin film, a molecule main chain structure of polyimide comprises a linear rigid unit, a polar amide group and a fluorine-containing group; preparation raw materials comprise aromatic dianhydride and diamine with the amide group and the fluorine-containing group. The preparation method comprises dissolving the aromatic diamine with the amide group and the fluorine-containing group, and adding the aromatic dianhydride to obtain polyamic acid homogeneous solution; carrying out film coating, curing, stripping and drying; tiling the product on a substrate, and carrying out fixing and annealing processing to obtain the polyimide thin film. The ultra-low-expansion fluorine-containing polyimide thin film and the preparation method and the application thereof implement wide application in the field of electronic and flexible display.

The invention discloses a method for preparing vinyl chloride by hydrochlorinating acetylene through using a quaternary phosphonium long-chain ionic liquid as a medium. The method comprises the following steps: dissolving a catalyst in a quaternary phosphonium long-chain anion functional ionic liquid medium to prepare a catalysis system, activating the catalysis system by introducing hydrogen chloride in advance, and introducing acetylene and hydrogen chloride to carry out a reaction. The method using the ionic liquid as the reaction medium and a mercury-free compound as the catalyst realizes the green and environmentally-friendly liquid phase reaction of acetylene hydrochlorination, has a very good catalysis efficiency, and makes the acetylene conversion rate reach 80-98% and the vinyl chloride selectivity reach above 99.5%.

The invention provides a VOCs absorbent and application thereof. The absorbent uses ionic liquid as a polarity phase, a small amount of ion liquid is evenly dispersed in a large amount of water or biodiesel to obtain a microemulsion under the effects of a non-ionic surface active agent and a cosurfactant. The microemulsion has very high VOCs solubleness, and the problems of inorganized VOCs discharge treatment and VOCs recycle of sewage treatment plants are solved.

The invention belongs to the field of building decoration material, in particular to melamine fumiture surface paper coated with an ultrasonic violet curing coating which is formed by applying the ultrasonic violet curing coating on the surface, and a preparation method thereof. A common paper substrate is dipped into melamine for once and then taken out and dried; and then a layer of ultrasonic violet curing coating is applied on one surface of the common paper dipped with the melamine, and is radiated and cured by ultrasonic violet; and the a layer of melamine is applied on the other surface of the common paper dipped with the melamine and dried, to obtain the melamine fumiture surface paper coated with the ultrasonic violet curing coating. After being coated at high temperature, the melamine fumiture surface paper coated with the ultrasonic violet curing coating obtained through the invention of the invention has the advantages of good adhesion of the surface ultrasonic violet curing coating and the melamine layer and good recoatability of the ultrasonic violet curing coating surface, and has better recoatability than the prior commonly used melamine fumiture surface paper.

The invention discloses a method for preparing a waterproofing agent of a saponin-free cation paraffin emulsion artificial board. The method comprises the following steps: under the function of a cosolvent which can be mutually soluble to water, taking vinyl monomers, such as styrene, an acrylate class monomer, a cation monomer, acrylamide and a derivative thereof and the like, as a copolymerization monomer and preparing a saponin-free benzene polymer with strong cation charges by a saponin-free emulsion polymerization method; taking the saponin-free benzene polymer as a high molecular emulsifying agent of solid paraffin, emulsifying and dispersing the paraffin and preparing the waterproofing agent of the saponin-free cation paraffin emulsion artificial board with favorable stability by homogenizing at high pressure. The invention overcomes the defects of poor waterproof effect, poor stability, easy bubbling of emulsion and the like due to the addition of a small molecular emulsifyingagent in the traditional paraffin emulsion; the product adopts the saponin-free benzene polymer with strong cation charges as the high molecular emulsifying agent of the solid paraffin, and the high molecular emulsifying agent which can generate a very strong hydrogen bond function with fibre in the artificial board not only enhances the water resistance of a board material but also can enhance the physical strength of the artificial board.

The invention relates to activated plant fiber, a preparation method thereof and an application of the activated plant fiber in a polylactic acid composite material. The preparation method comprises steps as follows: the plant fiber is pretreated by a solvent, the surface of the plant fiber is dissolved, and then the solvent is reserved; the activated plant fiber mainly comprises a plant fiber body and a wrapping layer which are connected through physical bonds and chemical bonds, and the wrapping layer is a polymer solution. The application is as follows: after the activated plant fiber is prepared, the activated plant fiber, lactide and a catalyst are mixed and subjected to a synchronous reaction on the premise that the anhydrous solvent is retained and a plant fiber/polylactic acid composite material is prepared, or the activated plant fiber, lactide and the catalyst are mixed and subjected to in-situ ring-opening polymerization, a plant fiber/polylactic acid grafted polymer is prepared, then the plant fiber/polylactic acid grafted polymer and polylactic acid are subjected to melt blending, and the plant fiber/polylactic acid composite material is prepared. The method is simple,the activated plant fiber has higher activity, and the finally prepared polylactic acid composite material has excellent performance.

The invention relates to a nanofiber membrane with a heavy metal adsorbing function and a preparation method of the nanofiber membrane. The nanofiber membrane comprises a matrix and macromolecules self-assembled on the surface of the matrix. The preparation method comprises the following step: self-assembling the macromolecules carrying amino groups on a thermoplastic nanofiber membrane by virtue of a chemical oxidative polymerization method to obtain the nanofiber membrane. The nanofiber membrane is simple in preparation process and low in cost, and is capable of efficiently adsorbing heavy metal ions; the defect that a conventional heavy metal ion adsorbing agent requires to be separated for the second time is avoided; the effective removal of hexavalent chromium ions is realized by using a principle of first adsorption and then reduction; meanwhile, the macromolecules have a strong hydrogen bond function among hydrophilic nanofiber membranes, cannot drop from the membranes, and can be recycled.

The invention relates to the technical field of lithium-sulfur secondary batteries, and mainly relates to lithiated vulcanized polyacrylonitrile used as a lithium-sulfur secondary battery positive electrode active material and a positive pole plate and lithium-sulfur secondary battery comprising the active material. The lithiated vulcanized polyacrylonitrile is prepared by lithiation of vulcanizedpolyacrylonitrile. By lithiation of the vulcanized polyacrylonitrile, the vulcanized polyacrylonitrile active material generates hydrophilic carboxylate ions, a hydrogen bond with a relatively high acting force is favorably formed in a system when the vulcanized polyacrylonitrile active material is combined with a conductive binding agent, and the sulfur-loading quantity and the unit area capacity of a positive electrode are favorably improved.

The invention belongs to the technical field of packaging materials, and particularly relates to a high-surface-energy long-carbon-chain polyamide transparent film, as well as a preparation method and an application thereof. The high-surface-energy long-carbon-chain polyamide transparent film is prepared from raw materials including long-carbon-chain polyamide material, wherein the long-carbon-chain polyamide is polyamide having the number of methylene between adjacent amide groups on the main chain being more than or equal to 10, and the surface tension of the high-surface-energy long-carbon-chain polyamide transparent film is 32-45mN/m; and the long-carbon-chain polyamide material is one or more of long-carbon-chain polyamide, additive-containing long-carbon-chain polyamide, long-carbon-chain polyamide alloy or long-carbon-chain polyamide nano-composite material. The high-surface-energy long-carbon-chain polyamide transparent film has the advantages of excellent mechanical performance, good size stability, good oil resistance and good gas barrier property, shows good printing performance under the condition that corona and other surface treatment means are not adopted, has excellent transparent property, and has a wide market prospect in packaging and printing technical fields.

The invention discloses a highly-hydrophilic adsorbent as well as preparation and application to absorption of rubidium ions or lithium ions. The preparation method of the highly-hydrophilic adsorbentis characterized in that a lithium ion sieve or a rubidium ion exchanger is added in an aqueous solution of a hydrophilic polymer, is fully stirred and mixed and drops in a phase conversion agent ina form of droplets; and after a primary ecological adsorbent in a form of a sphere is formed by solution phase transformation, the chemical cross-linking reaction is performed in an oil phase solutionof diisocyanate to obtain the highly-hydrophilic adsorbent. The adsorbent disclosed by the invention has the benefits that the ion exchange conditions of a lithium ion and rubidium ion adsorbent areensured due to high hydrophilic capacity, and the problem of solution loss of the adsorbent in the repeated use is solved; the preparation method is simple, and the preparation and the regulation aremild; the adsorbent prepared by the preparation method disclosed by the invention is higher in absorption and desorption speed.

The invention discloses a silicone oil removing water base detergent, comprising a mixed liquor of water and polyoxyethylene octylphenol ether, sorbide ester, glycol monoether and polyethylene glycol dimethyl ether, wherein the polyoxyethylene octylphenol ether accounts for 0.01-0.5wt% of the mixed liquor, and the sorbide ester accounts for 0.005-0.1wt% of the mixed liquor, and the glycol monoether accounts for 0.1-1.0wt% of the mixed liquor, and the polyethylene glycol dimethyl ether accounts for 0.01-0.5wt% of the mixed liquor. Aiming at problems that dust free chamber consumptions have standard exceeded silicone oil content and are not easily cleaned, and exisiting silicone oil removing detergent is not suitable for processing of dust free chamber consumptions, the invention provides a water base detergent, which is suitable for cleaning dust free chamber consumptions, and has simple formula, low costs, good silicone oil removing effect and good biodegradability.

The invention discloses a wear-resistant, oil-resistant and ageing-resistant control cable. The wear-resistant, oil-resistant and ageing-resistant control cable comprises a conductor. The conductor is wrapped by a polyvinyl chloride insulating layer, the polyvinyl chloride insulating layer is wrapped by a lining layer, the lining layer is wrapped by an armor layer, and the armor layer is wrapped by an outer sheath. The outer sheath is prepared from a modified natural rubber composite, and the modified natural rubber composite is prepared from natural rubber, butadiene styrene rubber, butadiene rubber, epoxidized natural rubber, modified composite filler, stearic acid, zinc oxide, sulphur, 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, an accelerant, an age resister, a scorch retarder, a resorcinol-hexamine complex and 2-ethylhexyl epoxystearate. The wear-resistant, oil-resistant and ageing-resistant control cable is high in strength, excellent in wear resistance and oil resistance, good in ageing resistance and long in service life.

The invention discloses a light-curable polyurethane-poly(methyl) acrylate pressure-sensitive polymer and a preparation method thereof. The preparation method for the light-curable polyurethane-poly(methyl) acrylate pressure-sensitive polymer comprises the following steps: heating 10 to 90 parts by weight of a polyurethane macromonomer and 10 to 90 parts by weight of a (methyl)acrylate macromonomer to a temperature of 60 to 75 DEG C under the action of a catalyst B and carrying out a reaction for 4 to 5 h so as to obtain the light-curable polyurethane-poly(methyl) acrylate pressure-sensitive polymer. The structure of the light-curable polyurethane-poly(methyl) acrylate pressure-sensitive polymer combines the advantages of polyurethane and poly(methyl) acrylate into one; meanwhile, an introduced ethoxy structure improves fluidity of the polymer and reduces shrinkage, which is beneficial for uniform coating of the polymer during production of a pressure-sensitive adhesive, and low shrinkage can guarantee stability of the pressure-sensitive adhesive and prolongs the service life of the pressure-sensitive adhesive.

The invention discloses a preparation method of a coated sustained-release fertilizer. The method comprises the following steps: vegetable fat and starch are mixed under a temperature of 80-100 DEG C, such that vegetable fat plasticized starch is obtained; vegetable fat and diisocyanate are mixed by stirring under a temperature of 15-60 DEG C, such that a vegetable fat polyurethane prepolymer is obtained; the vegetable fat plasticized starch and the vegetable fat polyurethane prepolymer are mixed in a solvent, such that a modified starch solution is obtained; the modified starch solution is coated on the surface of fertilizer particles, and is dried, such that a modified starch coated sustained-release fertilizer is obtained. During the preparation process of the vegetable fat polyurethane prepolymer, a molar ratio of isocyanate to hydroxyl is 2-4. The modified starch prepared with vegetable fat is green and environment-friendly. The method has the advantages of simple production process, low production cost, and the like. The method provided by the invention is a novel application of vegetable fat in the fields of modified starch preparation and in sustained-release coating materials.

A method of preparing a retardation film includes cellulose acetate having an average degree of acetylation of 2.0 to 2.5 and having a moisture content of 1.0 mass % or less, where the retardation film includes a compound having a Van der Waals volume of 450 to 1000 Å3. The retardation film is prepared by a dope preparing step of dissolving cellulose acetate having an average degree of acetylation within the range of 2.0 to 2.5 to prepare a dope; a film product forming step of casting the dope onto a metal belt to form a film product; a film product peeling step of peeling off the film product from the metal belt; a drawing step of drawing the peeled film product; and a drying step at a drying temperature of 140° C. or more.

The invention discloses a toughening type benzoxazine composite and a preparation method thereof. The toughening type benzoxazine composite is prepared by solidifying 75-96 parts of benzoxazine monomers, 3-20 parts of nylon 12 microspheres and 0.1-5 parts of benzoxazine monomer modified graphene oxide at the temperature of 160-200 DEG C. Benzoxazine monomer modified graphene oxide can effectively assist nylon 12 microspheres in uniformly dispersing in a benzoxazine resin matrix and thereby playing a role in synergistic toughening. The toughening type benzoxazine composite has high breaking tenacity, high Young modulus and high tensile strength. The toughening type benzoxazine composite can be widely applied to occasions with high requirements for the material toughness.