184results about How to "Strong film forming" patented technology

The invention discloses a mono-component varnish composition, which comprises at least a polymer having a hyper branched or dendritical structure; at least one type of hydroxyl acrylic resin or hydroxyl methacrylate resin; at least one type of organosilicon-modified acrylic resins; at least a crosslinking curing agent; at least an acid catalyst; at least a rheological control agent; at least an auxiliary agent and at least a solvent; and the mono-component varnish composition has the advantages of high scratch resistance and high weather resistance. The provided mono-component varnish composition can effectively increase the smoothness of the surface of a varnish composition film, and increases the rub resistance of the film; in addition, the introduction of the organosilicon-modified acrylic resin can further increase the weatherability of the varnish composition film.

The invention relates to a preparation method of modified cation waterborne polyurethane emulsion containing hydrophilic and hydrophobic side long chains and a product thereof. The method comprises the following steps that raw materials are prepared; polyester glycol dehydration pretreatment is carried out; polyester glycol obtained after dehydration pretreatment is subjected to a prepolymerization reaction with an end alkyl polysiloxane linear body, a nonionic chain extender, a functionality chain extender and diisocyanate under catalyzing of a polymerization catalyst so that a prepolymer can be obtained; the prepolymer reacts with a nonionic chain extender and a part diluent to prepare an intermediate; the intermediate reacts with a silane coupling agent, and is emulsified to prepare the modified cation waterborne polyurethane emulsion. The product is a polyester type cation waterborne polyurethane high-polymer material containing hydrophilic and hydrophobic side long chains, wherein polysiloxane is embedded into a main chain of the material, a side chain is grafted with long-chain polyether and long-chain alkyl, and the silane coupling agent is connected into the tail end of the material; the film-forming ability is high, and serving as a film, the emulsion has obvious water-repellent, antifouling and easy dirt-removing abilities, is excellent in compatibility with a cation softening agent, and has an excellent low-temperature soft feature; the product is safe, environmentally friendly and convenient to use.

The invention discloses an isolating membrane of lithium ion secondary battery, comprising a porous substrate and a polymer coating distributed only on a surface of the porous substrate which faces an anode of the lithium ion secondary battery, wherein the polymer in the polymer coating is selected from poly(methyl methacrylate-acrylonitrile), poly(methyl methacrylate-vinyl acetate), poly(methyl methacrylate-acrylonitrile-vinyl acetate), poly(n-butyl methacrylate-styrene), or blends of the polymers. The polymer unit in the polymer coating of the isolating membrane of the lithium ion secondary battery contains carbonyl, wherein very strong effect exists between the carbonyl and oxygen in carbonic acid ester type organic solvent so as to have fine solution suction ability and good interface stability of lithium electrode or anode; the membrane has strong adhesive property and film formation, and can provide fine mechanical tensile strength; and the membrane has fine cycle performance and safety performance. The invention further discloses a polymer lithium ion secondary battery using the membrane.

The invention discloses a PPTA paper using aramid nanofiber for self-reinforcement and a preparation method thereof. The preparation method includes: utilizing para-aramid paper nanofiber with the advantages of special nano-structure, small fiber diameter, large length-diameter ratio, high surface activity, excellent heat resistance and the like as the self-reinforcement material of para-aramid paper, conducting mixing, defibering and dispersion on aramid chopped fiber, pulp or fibrid and aramid nanofiber to make a uniform suspension, carrying out papermaking shaping, squeezing and drying, andfurther performing hot-pressing on a hot press to obtain aramid paper. The introduced aramid nanofiber enables nanoscale aramid fiber and an aramid nanofilm formed thereby to reach the good interfacefilling, coating and enhancement effects, provides more binding sites for the combination of components, at the same time reduces the pores and holes between components, significantly improves the bonding strength between the aramid paper components, and greatly enhances the mechanical and insulation properties.

The invention discloses an aramid paper compounded with an aramid nanometer fiber thin film and a preparation method thereof. The aramid paper is compounded by a surface layer, a core layer and a bottom layer through a wet type papermaking laminating method, wherein the ratio of the surface layer to the core layer to the bottom layer is (5 to 20):(60 to 90):(5 to 20) in parts by weight of absolutedry fiber; the surface layer and the bottom layer respectively adopt aramid nanometer films which are prepared from aramid nanometer fibers; the core layer adopts the aramid paper which is prepared from one of aramid chopped fibers and aramid pulp fibers or aramid precipitated fibers. The aramid paper has the advantages that because of excellent strength property and dense thin film structure ofthe aramid nanometer fiber film, more bonding sites are provided for bonding with the fiber components of the aramid paper, and the larger pores can be filled and coated; the comprehensive property ofthe final product is greatly improved, and the aramid paper is favorably widened to the high-end application field.

The invention relates to a novel modified emulsified paraffin concrete curing agent. Aiming at overcoming the defects that the existing concrete curing agent cannot reach the industrial standard on building material in terms of the water retention property and is unfavorable for environmental protection, the price is high and the decoration at later stage is also affected, the following technical proposal is provided: the curing agent is mixed with the following materials and water: 10-20% of vinyl acetate-ethene high molecular polymer emulsion, 0-5% of silicone resin modified acrylic polymer emulsion, 50-75% of paraffin emulsion, 0.1-0.5% of colloidal dispersing agent of the emulsified paraffin for stabilizing the emulsion state and 0.05-0.02% of special defoamer for emulsion. The invention has the beneficial effects that: the chemical curing method which is adopted for retaining water is an innovation for the traditional curing method; compared with the prior art, the method is labor-saving, time-saving and water-saving and is convenient to operate, can improve the film formation ability and the sealing ability of the emulsified paraffin emulsion, and can improve the bonding and absorbing capacity of the emulsified paraffin emulsion on the concrete surface, which leads the effective water retention rate of the coating film to reach more than 90%.

The invention relates to the technical field of bra cup pad, and specifically relates to a vertical cotton breathable bra cup pad with a silica gel net and a preparation method thereof. The vertical cotton breathable bra cup pad comprises a vertical cotton outer layer and a vertical cotton inner layer; a vertical cotton interlayer is arranged between the vertical cotton outer layer and the vertical cotton inner layer; an adhesive layer is arranged between the vertical cotton interlayer and the vertical cotton inner layer; and a silica gel net layer is arranged between the vertical cotton outer layer and the vertical cotton interlayer. The vertical cotton breathable bra cup pad is prepared by a combined technology of hot pressing and cold pressing. The pad is made of vertical cotton, and is light, comfortable, and breathable. A silica gel layer is arranged between vertical cotton layers, the performance of the pad on resisting water washing is enhanced, the anti-collapse effect is good, three-dimensional effect of the cup pad is long-lasting and stable, and the deformation is difficult to happen.

The invention discloses a water-based nano reflection and heat insulation transparent coating and a preparation method thereof. The formula of the coating comprises the followings in percentages by weight: 35%-50% of a water-based acrylic emulsion, 5%-15% of water-based lithium silicate, 5%-15% of a water-based polyurethane emulsion, 5%-10% of a water-based heat insulation nano dispersion sizing agent, 5%-10% of a water-based heat insulation and heat preservation nano dispersion, 2%-12% of a wetting dispersant, 0.2%-0.5% of a flatting agent, 0.2%-1% of a thickener, 0.1%-0.2% of an antifungus and anti-mildew agent, 0.5%-2.5% of a coalescing agent, 0.5%-2% of a silane coupling agent and 5%-25% of deionized water. According to the water-based nano reflection and heat insulation transparent coating disclosed by the invention, under the precondition of without influencing lighting, heat radiation is blocked and infrared heat energy is prevented from being conducted into the interior of a base material through effective reflection and heat energy conduction, and thus the effects of heat insulation and heat preservation are reached. Heat energy, entering the room through the base material, generated by an outdoor heat source can be effectively blocked in summer, and indoor heat can be effectively blocked from being dispersed in winter, so that the application of refrigeration and heat preservation equipment can be effectively reduced, and the energy-saving effect is obvious.

The invention provides application of polyimide with a structure presented by a formula I (shown in the description) in gas separation. By introducing 2,2',3,3'-biphenyl tetracarboxylic acid dianhydride with a twisted structure to be polymerized with diamine monomers, polyimide with good film forming capacity is obtained. Synthesized polyimide is relatively low in cost, has relatively large specific surface area and good thermal heat stability, gas selectivity and gas permeability and further has good application prospects in the field of gas separation.

The invention discloses an antibacterial wash-and-wear fire-retardant finishing liquid which is prepared from the following raw materials in parts by weight: 10-15 parts of glyoxal, 10-15 parts of citric acid, 5-8 parts of cyclic phosphate, 5-8 parts of a licorice extract, 3-5 parts of chitosan, 2-3 parts of magnesium chloride, 2-3 parts of sodium hypophosphite, 1-2 parts of a penetrant, 1-2 parts of a coupling agent, 1-2 parts of a softener, 1-2 parts of ethylene glycol, 1-2 parts of a fiber protecting agent, 1-2 parts of a pH adjusting agent and 1-2 parts of a dispersant. The prepared multifunctional antibacterial finishing liquid is environment-friendly and free of pollution, has good efficacies of being wash-and-wear, shrink-proof, antibacterial and flame-retardant, and can meet the requirements of people on various functional aspects of textiles.

The invention discloses a preparation method of a composite functional fresh-keeping paper based material with enhanced slow release function. The preparation method comprises following steps: 1, beta-cyclodextrin and essential oil are weighed to prepare essential oil microcapsules; 2, the essential oil microcapsules and a mesoporous molecular sieve are mixed, water is added, and high speed oscillation treatment is carried out so as to obtain a molecular sieve loaded with the essential oil microcapsules; 4, the molecular sieve loaded with the essential oil microcapsules, a starch solution, a chitosan solution, and an inorganic salt solution are mixed and stirred at a ratio, deionized water is added to adjust the solid content to be 5 to 10% so as to obtain a coating solution; 5, the surface of food package body paper is uniformly coated with the coating solution; and 6, the coated paper is dried fully at room temperature so as to obtain the functional fresh-keeping paper based material. The fresh-keeping paper prepared using the above preparation method is capable of prolonging the storage period of packaged products, and the service life of the fresh-keeping paper can be prolongedat the same time.

The invention provides a bacterial cellulose pervaporation membrane, which is characterized in that the preparation method is as follows: Acetobacter xylinum DT4.2 strain of the active wood fermentation is put into the seed culture fluid and shaking cultured at constant temperature of 25 to 32 DEG C for 8 to 24 hours; the seed solution is put into the fermentation culture solution to be evenly shaken; and then the fermentation culture solution is moved to the container for culturing for 7 to 15 days at the constant temperature of 25 to 32 DEG C; pellicle membrane formed on the surface of the fermentation solution is taken out and then is processed by the alkali liquor with the quality concentration of 1 to 20 percent; the residual alkali liquor in the membrane is washed to neutrality by the deionized water to prepare into the membrane after drying. The invention also discloses the application of the membrane. The preparation method of the membrane has the advantages of simple preparation, good mechanical and chemical property, excellent heat stability, strong hydrophilicity, high separation choice to the water in the organic water solution at lower temperature, long service life; moreover, the membrane material itself can be biodegradation which is a environmental friendly material.

The invention discloses a polyurethane elastic fiber finishing agent, comprising the following components in parts by weight: 75.0-98.8 parts of at least one substrate selected from silicon oil and white mineral oil, 1.0-10.0 parts of isomerous high-carbon alcohol, 0.1-10.0 parts of MQ silicon resin of which the pour point is smaller than or equal to 100 DEG C and 0.1-5.0 parts of trisiloxane polyether organic phosphate. The finishing agent enables the polyurethane elastic fiber to have favorable antistatic property, lubricating property and grating balancing property in the filament reeling process, so that the polyurethane elastic fibers reeling at high speed have stable tension and do not skid or cause the filament roller to mess up, thereby endowing the polyurethane elastic fibers withfavorable reeling property. The finishing agent also enables the polyurethane elastic fibers rolled on the roller to have enduring anti-adhesion insulation property, so that the polyurethane elasticfibers have favorable cocoon reelability and thorough root unreeling property in the downstream unreeling process, thereby endowing the polyurethane elastic fibers with favorable unreeling property.

The invention discloses a preparation method of a degradable food packaging film, and relates to the field of packaging films. The preparation method comprises the following steps of (1) crushing teastems; (2) extracting tea polyphenols; (3) concentrating, spraying and drying; (4) dissolving by polylactic acid; (5) mixing the raw materials; (6) removing the bubbles in the mixture; (7) preparing the biodegradable food packaging film. The preparation method has the advantages that the tea polyphenols and chitosan are extracted from the discarded tea stems and are added into the solution of polylactic acid, so that the prepared material has good antibacterial and anti-oxidizing properties; the material is degradable, green and non-toxic; after the air bubbles can be removed, the surface of the prepared package is flat, and the appearance is attractive.

The invention belongs to the technical field of energy materials and energy conversion and in particular relates to a silicon-based lithium ion battery composite negative electrode material, a negative electrode using the material, and a lithium ion battery. The silicon or silicon alloy composite lithium ion battery negative electrode material containing lithium bis(oxalate)borate contains 1-20 mass percent of lithium bis(oxalate)borate (LiBOB). The negative electrode material disclosed by the invention is obtained by adding lithium bis(oxalate)borate into a silicon or silicon alloy-carbon composite lithium ion battery negative electrode material, or is obtained by introducing the lithium bis(oxalate)borate in the process of preparing the battery negative electrode material. According to the battery negative electrode material, the highest first charge and discharge capacity can reach 1800-2000 mAh per gram, the capacity after 100 times of cycle can reach 1200-1500 mAh per gram, and the capacity retention ratio reaches 69-85%.

The invention belongs to the technical field of functional materials and photopolymerization and relates to a method for manufacturing a nano titanium dioxide thin film through photocuring. According to the method, a nano titanium dioxide colloid and a photopolymerisable monomer material are mixed to manufacture a colloid titanium dioxide dispersoid, the colloid titanium dioxide dispersoid is coated on the surface of a base material and polymerized and curied through radiation of ultraviolet to manufacture a film, and finally, the porous nano titanium dioxide thin film is obtained by performing thermal treatment on the film. The invention also provides a method for manufacturing the porous nano titanium dioxide thin film by photocuring an organic and inorganic mixed system coating. The method accords with a '5E' principal of a photocuring technology, the morphology, the thickness, the pore dimension and the like of the thin film are regulated and controlled by changing reaction conditions such as types of a monomer and a photoinitiator, the monomer addition amount, a film coating method and the like; the manufactured porous nano titanium dioxide thin film has the advantages of high specific surface area, smooth and uniform surface, high porosity and the like and is difficultly peeled. The method can be applied to a dye-sensitized solar cell; through a porous structure, the dye adsorption capacity can be enhanced, the light scattering performance is enhanced, and the photoelectric conversion efficiency of the cell is improved; and the manufactured thin film has a high practical value and a application prospect.

The invention relates to the technical field of electrochemical immune sensing and particularly relates to a preparation method and application of a label-free type electrochemical immunosensor based on a MoS2/Au composite material. H2O2 is used as an electrochemical probe and the MoS2/Au composite material is used as a substrate material; and the stability and sensitivity of the immunosensor are remarkably improved based on the advantages of good film-forming capability and biocompatibility, large specific surface area, and excellent catalytic properties on the H2O2 by MoS2 and the like. A detection principle utilizes the change of current before and after an antigen-antibody immune reaction. After an antigen is reacted with an antibody modified on the current, an immune compound is formed and is a non-active substance, so that a channel from an electron to the surface of an electrode is seriously hindered. Along the increasing of the concentration of the antigen, more immune compounds are formed, and the channels from the electron to the surface of the electrode are fewer, so that a current signal is reduced. The sensor is used for detecting alpha fetoprotein; and a detection linear range is 0.005ng/mL-100ng/mL and the detection limit is 2.5pg/mL.