49results about How to "Tight network structure" patented technology

The present invention discloses one kind of temperature sensitive chitosan hydrogel comprising chitosan 0.2-20 wt%, glycerin 1-60 wt% or mannitol 0.5-40 wt%, and borax 0.5-20 wt%, and its preparation process including the steps of dissolving chitosan in acid solution, adding glycerin or mannitol solution, adding borax solution while stirring, and heating the mixed solution to gelation temperature to obtain hydrogel. The temperature sensitive chitosan hydrogel is liquid at lower temperature and become gel at body temperature, and it may be applied as the injection implanted material and painted material. The preparation process has mild condition and environment friendship, and the temperature sensitive chitosan hydrogel has high temperature sensitivity, high mechanical strength, and wide application foreground in medicine carrier, biological tissue engineering, etc.

The invention relates to an anti-scrubbing composite antibacterial metal paint and a preparation method. The paint is composed of the following components in percentage by weight: 10 to 30% of modified polyester resin, 10 to 30% of modified epoxy resin, 5 to 20% of modified styrene-acrylic emulsion, 1 to 15% of coupling agent, 10 to 40% of nano titanium dioxide sol, and 5 to 20% of antibacterial metal ion solution. The invention solves the problems that the application and antibacterial effect of titanium dioxide photocatalyst are confined by environment, the metal ion paint is easy to fade, the antibacterial effect cannot last for a long time, and the scrubbing resistant performance of the metal based antibacterial paint is not good.

The invention discloses an ultra low film peeling voltage polyurethane protective film. The ultra low film peeling voltage polyurethane protective film, from top to bottom, comprises an internal adding type antistatic PET layer, a polyurethane antistatic adhesive layer, and a PET antistatic release film layer; the impedance of the surface and the impedance of the internal part of the internal adding type antistatic PET layer are the same; the polyurethane antistatic adhesive layer is composed of polyurethane, a curing agent, and an antistatic agent at a mass ratio of 70:5:0.1-70:12:4. Applications of the ultra low film peeling voltage polyurethane protective film is capable of preventing breakdown and destroy of touch screen inductors caused by excessive voltage generated in film peeling process. The internal structure of the polyurethane antistatic adhesive layer in the ultra low film peeling voltage polyurethane protective film is compact, so that it is convenient for dispersion of the antistatic agent molecules and release of static electricity, and antistatic agent precipitation is not caused at high temperature high humidity environment.

The invention discloses a photocatalysis bio-adsorbent and a preparing method and application thereof. The photocatalysis bio-adsorbent comprises phanerochaete chrysosporium balls, graphite type C3N4 and calcium alginate, wherein graphite type C3N4 is wrapped in hyphae of the phanerochaete chrysosporium balls through calcium alginate. The preparing method comprises the steps of adding graphite type C3N4 to sodium alga acid solution for ultrasonic dispersion, then adding phanerochaete chrysosporium spore suspension, conducting uniform mixing, adding obtained mixed solution to calcium chloride solution dropwise for hardening, and conducting shake cultivation on embedding spheres obtained after hardening so as to obtain the photocatalysis bio-adsorbent finally. The photocatalysis bio-adsorbent has the advantages of being high in photocatalysis capacity, high in adsorption efficiency, low in cost, convenient to separate and recover and the like. The photocatalysis bio-adsorbent can be used for treating composite waste water containing cadmium and 2,4,6-trichlorophenol, the heavy metal cadmium and the organic pollutant 2,4,6-trichlorophenol in waste water can be removed at the same time, and adsorption degradation efficiency is high.

The invention discloses a polyurethane thermal-insulation composite board which comprises a polyurethane thermal-insulation layer and back lining layers arranged on the inner and lower surfaces of the polyurethane thermal-insulation layer, wherein the polyurethane thermal-insulation layer is prepared from a high-performance polyurethane rigid foam material. The high-performance polyurethane rigid foam material is prepared from polyester polyol, diphenylmethane diisocyanate, hexamethylene diisocyanate, polyacrylate, styrene-butadiene rubber, cyclohexylamine, triethylenediamine, stannous octoate, a foaming agent, hydroxy silicone oil, a flame retardant, expanded perlite, attapulgite, pentaerythritol and sorbitol. The flame retardant is prepared from red phosphorus, nano magnesium hydroxide, ammonium polyphosphate, aluminum diethyl hypophosphite, piperazidine pyrophosphate and hexametapol. The polyurethane thermal-insulation composite board disclosed by the invention has the advantages of high strength, favorable impact resistance, excellent flame retardancy and long service life.

The invention provides a paint composition, which comprises waterborne epoxy acrylate, a photoinitiator, a crosslinking agent and an auxiliary in the weight ratio of 35-62:0.5-3:13-24:3.5-12.5. The invention also provides a method for preparing the paint composition, which comprises the following steps of: adding the waterborne epoxy acrylate, the photoinitiator and the crosslinking agent into the auxiliary under stirring; and filtering after complete stirring. The invention also provides a method for using the paint composition, which comprises the following steps of: spraying the paint composition on the surface of a substrate, and curing by ultraviolet radiation; and baking and thermally curing the substrate after radiation. A paint film formed after the paint composition is subjected to ultraviolet ray-heat dual curing has higher mechanical performance, wherein the adhesive force is between 0 and 1 level, the flexibility is 1mm, and the hardness is between 4 and 5H.

The invention provides a water-based chameleon solvent-resistant elastic coating, which comprises the following ingredients (by weight): 10-15 parts of deionized water, 40-60 parts of waterborne resin, 6-10 parts of chameleon pigment, 8-10 parts of a water-based curing agent, 2.5-5 parts of water-based matting powder, 0.3-0.5 part of a dispersant, 0.3-0.5 part of a wetting agent, 0.8-1.2 parts ofa leveling agent, 3-4 parts of a coalescing agent, 1-2 parts of a hand feeling agent, 1-2 parts of water-based wax, 0.1-0.3 part of an antifoaming agent, 0.1-0.3 part of a pH regulator, 0.2-0.4 part of a thickening agent, 2-3 parts of propylene glycol methyl ether acetate, and 1-3 parts of DB7650 special modified polyurethane. The coating is safe and environmentally-friendly, and has good solventresistance, film fullness, scratch resistance and wear resistance. In addition, hand feeling and application property are also greatly enhanced.

The invention belongs to the field of printed electronics and particularly relates to a preparation method of a conductive printing ink for a gas sensor electrode material. The method comprises the following concrete steps: mixing modified urea resin with superconductive carbon black and adding 5wt% of curing agent and a proper amount of active diluent, so as to prepare the conductive printing ink for the sensor electrode material. The conductive printing ink is thermocured to obtain printed patterns, wherein the electrical resistivity of the printed patterns is 1-5 ohm.m, the thermal decomposition temperature exceeds 250 DEG C, and the cured carbon powder particles form a dense net structure by observation of an scanning electron microscope. The conductive ink prepared by the method has the advantage that the viscosity is easy to control and is suitable for various printing technologies, including but not limited to newly-developing addition process technologies such as ink-jet printing, aerosol spray printing and the like, and can also be suitable for traditional processes such as silk-screen printing, intaglio printing and the like, and compared with the method for preparing a chemical sensor electrode material at present, the method can save cost greatly.

The invention provides cross-linking type pure acrylic emulsion for natural stone paint and a preparation method. The internal and external cross-linking type natural stone paint pure acrylic emulsion with the high water white resistance is synthesized by taking hard monomers, soft monomers, a compound emulsifier, internal cross-linking monomers, an organosilicon coupling agent, a thermolysis initiator, a pH regulator and an external cross-linking agent as raw materials and adopting a semicontinuous seeded emulsion polymerization method. According to the natural stone paint acrylic emulsion, Tg of cores and Tg of shells are controlled by designing the constitution and dosage of the soft monomers and the hard monomers in the cores and the shells of latex particles, and therefore the emulsion achieves the good contamination resistance while the good water resistance and film-forming property of the emulsion are guaranteed; through the internal cross-linking monomers and the external cross-linking agent, internal and external double cross-linking of the latex particles is achieved, therefore, the water white resistance of the emulsion is greatly improved, and water white cannot be generated when a coating film is soaked in water for half a month.

The invention discloses a slow-release fertilizer special for flowers. The slow-release fertilizer is prepared from, by weight, 80-120 parts of organic fertilizer, 10-25 parts of urea, 8-21 parts of ammonium dihydrogen phosphate, 5-17 parts of calcium superphosphate, 8-18 parts of ammonium chloride, 25-38 parts of potassium chloride, 3-11 parts of potassium silicate, 2-8 parts of manganese sulfate, 1-5 parts of ammonium molybdate, 1-5 parts of ethylenediaminetetraacetic acid ferric sodium salt, 2-9 parts of ammonium zinc phosphate, 8-15 parts of biochar, 5-15 parts of bone meal, 0.3-0.9 part of urease-nitrification inhibitor, 3-9 parts of attapulgite, 3-11 parts of kaolin, 2-9 parts of weathered coal and 1-5 parts of potato starch. The provided slow-release fertilizer special for the flowers has the advantages that the formula is reasonable, nutrients are comprehensive, the slow-release effect is good, and the slow-release fertilizer is used for flower planting, has long fertilizer efficiency and high utilization rate.

The invention discloses a novel facial and skin cleaning care material and a preparation method thereof, and belongs to the technical field of skin cleansing care. The novel facial and skin cleaning care material is of a microporous film structure prepared by processing a polyolefin material, the film thickness is 5-100 microns, and the film porosity is 20-80%. The novel facial and skin cleaning care material has the advantages that a porous film substrate is also coated with a functional coating, wherein the functional coating comprises a filler and a binder; dead skin, dust, cosmetics, organic impurities and the like on the face all can be effectively cleaned through the cleaning care material, the skin is smoother after being cleaned, and the skin and the stratum corneum cannot be damaged.

The invention discloses a preparation process of flame-retardant polyester resin, which is characterized by comprising the following steps: adding a flame-retardant reinforcing agent, absolute ethyl alcohol and a sodium hydroxide solution with the mass concentration of 18% into a reaction kettle, stirring to dissolve, adding saturated polyester resin liquid, reacting for a period of time, adding asaturated solution of sodium carbonate, dropwise adding diaminosilane after stirring and reacting for 4 hours, continuously adding diethylene glycol monoethyl ether acetate in the reaction process, carrying out rotary evaporation to recover the solvent, and washing the product to be neutral to obtain the flame-retardant polyester resin. According to the flame-retardant polyester resin prepared bythe invention, the saturated polyester resin is subjected to cross-linking polymerization by virtue of a flame-retardant enhancer, and two amino groups in the diaminosilane added into the saturated polyester resin can be subjected to addition reaction with olefin groups, so that the polyester resinis cross-linked with flame-retardant enhancer and then cross-linked by virtue of the diaminosilane to form a reticular structure; therefore, the prepared resin has relatively strong performance.

The invention discloses a mildew-proof agent for artificial boards, and belongs to the technical field of additives for artificial boards. The mildew-proof agent has the advantages that mixed alcoholis added into tetrabutyl titanate which is a titanium source, adsorption thin layers are formed on the surfaces of particles, accordingly, durable and stable antibacterial and mildew-proof effects canbe guaranteed, and the stability of bacterial inhibition agents can be improved; oxidizing agents added into the mildew-proof agent are Jones reagents, alpha-site hydroxyl can be directionally oxidized by the oxidizing agents to obtain aldehyde, beta-site hydroxyl can be directionally oxidized by the oxidizing agents to obtain carbonyl, soybean proteins can be decomposed into different types of amino acid, Schiff base can be formed, accordingly, pore structures inside systems can be densely filled, and the moisture barrier and mildew-proof properties can be effectively enhanced; partial functional group locations in cross-linked networks of the systems can be occupied by added lavender essential oil in preparation procedures, the vibration intensity of covalent bonds in molecules in the cross-linked networks can be lowered, accordingly, the water-resistant performance further can be reinforced, ascorbic acid can have bacterial inhibition performance, and the problem of poor mildew-proof effects of current common mildew-proof agents for existing artificial boards can be solved by the aid of the mildew-proof agent.

The invention discloses an anti-aging rubber sealing ring material and a preparation method thereof. The anti-aging rubber sealing ring material is prepared from the following raw materials in parts by mass: 80-90 parts of fluorinated silicone rubber, 15-20 parts of acrylic rubber, 10-15 parts of chloroprene rubber, 10-15 parts of polyurethane rubber, 8-12 parts of polycaprolactone, 12-20 parts ofa filler, 5-8 parts of nano silica, 6-10 parts of a quartz fiber, 3-8 parts of a composite anti-aging agent and 2-5 parts of a vulcanizing agent. The preparation method of the anti-aging rubber sealing ring material comprises the following steps: weighing the raw materials, pretreating the raw materials, preparing a premix, preparing blended rubber, carrying out vulcanization molding, and carrying out trimming treatment. Due to addition of the environmental-friendly polycaprolactone in a sealing ring made of the anti-aging rubber sealing ring material, the polycaprolactone is cross-linked with the polyurethane rubber to form a dense net structure, and in addition, the material has a certain self repairing function; meanwhile, due to addition of the nano silica and the quartz fiber, the pressure resistance and the aging resistance of the sealing ring material are improved, and the service life of the sealing ring can be prolonged.

The invention discloses a modified epoxy resin emulsion, and a preparation method and an application thereof. The preparation method comprises the following steps: heating a mixed reaction system containing N,N,N',N'-tetramethyl-1,6-hexanediamine, a bisphenol A epoxy resin and an organic solvent to perform react a reaction, adjusting the obtained reaction mixture to be neutral or weakly acidic, and adding water to obtain the modified epoxy resin emulsion. The modified epoxy resin emulsion has the advantages of excellent stability, simple preparation method, long-term storage without deterioration, small influences on the environment, and easiness in dissolving and dispersing in the coating preparation process; and the preparation method is simple, so batch production is facilitated, and the problems of non-uniform dispersion and serious sedimentation of a pigment and filler when a traditional epoxy resin is used as a film-forming substance are solved. A conductive coating prepared fromthe modified epoxy resin emulsion has a lasting conductivity, can slow down or prevent damage to a metal matrix, and can be applied to protection of grounding grid metals under different working conditions.

The invention discloses a composite antibacterial film and a preparation method thereof, and relates to the technical field of food preservation. The composite antibacterial film is prepared from thefollowing raw materials: polyvinyl alcohol, glycerol, water and epsilon-polylysine. The preparation method of the composite antibacterial film comprises the following steps: adding polyvinyl alcohol into water, and soaking until polyvinyl alcohol absorbs water and swells to obtain a swelled body; heating and melting the swelling body, adding glycerol, and uniformly stirring and mixing the components to form a mixed solution; adding epsilon-polylysine into the mixed solution, stirring the mixed solution, and performing a reaction to generate a membrane solution; and spreading the film liquid ina film forming device, and baking the device to form a film, thereby obtaining the composite antibacterial film. The invention aims to provide the composite antibacterial film with a good antibacterial effect so as to prolong the shelf life of food.

The invention discloses an antibacterial coil coating with water resistance, which comprises the following components in parts by weight: 42-56 parts of modified polyester resin, 6-10 parts of amino resin, 13-21 parts of pigment, and precipitated barium sulfate 2-8 parts, dispersant 0.3-0.9 parts, leveling agent 0.1-0.7 parts, antioxidant 0.1-0.3 parts, acid catalyst 0.2-0.6 parts, solvent 20-28 parts. The modified polyester resin in the coating prepared by the present invention is prepared by reacting a saturated polyester resin with a dislocation antibacterial enhancer, and the terminal aldehyde group and the phenolic hydroxyl group in the dislocation antibacterial enhancer can respectively react with the styrene in the saturated polyester resin liquid. The ketone group reacts with the bromine element, so that one end of the dislocation antibacterial enhancer is grafted on the carboxyl side of the ester group in the polyester resin, and the other end is grafted on the hydroxyl side of the ester group to realize dislocation crosslinking. When the base is hydrolytically broken, the polymer can still be cross-linked through the dislocation antibacterial enhancer, and the polymer still maintains a network structure, so that its structural characteristics will not change.

The invention provides multifunctional double-order melting method efficient production equipment and process, the equipment comprises a rack, a material storage device, a weighing device, a material collecting device, a mixing mechanism, a banburying mechanism, an extruding mechanism and a follow-up mechanism, and the process comprises the steps that materials are put into the material storage device, and after being metered by the weighing device, the materials are fed into the extruding mechanism; materials are fed into the mixing mechanism through the material collecting device to be primarily stirred and mixed, the evenly-mixed mixture is internally mixed and plasticized, then enters the extrusion mechanism in a semi-molten state, is heated and stirred in the extrusion mechanism and then is extruded in a molten state to be subjected to follow-up requirements such as tape casting or granulation, and the materials are formed through one-time machining. And compared with traditional equipment, material molecular structure changes caused by secondary or multiple heating plasticization of the material are reduced, and secondary pollution of the material is more effectively avoided.

The invention provides an imidazole-enhanced ultrahigh-temperature-resistant liquid rubber plug and a gel forming test improvement method thereof, and relates to the field of oilfield chemistry. The imidazole-enhanced ultrahigh-temperature-resistant liquid rubber plug is mainly prepared from the following components in percentage by mass: 5-20% of imidazole, 0.2-0.4% of a stabilizer, 2-4% of a nano material, 2-4% of a polymer, 1-2% of a cross-linking agent and the balance of water. The imidazole-enhanced ultra-high-temperature-resistant liquid rubber plug is prepared from the raw materials, the preparation process is simple, the rubber plug can resist the temperature of 190 DEG C, the initial setting time is 1-1.5 hours, the final setting time is 3.5-4 hours, and the requirements of 2-5 days of shaft temporary plugging and flowback operation of an ultra-high-temperature reservoir (180-190 DEG C) can be met. The improved gel forming test method overcomes influence of the heating rate and the heat transfer material neglected by conventional means, and can further simulate the real underground situation and reduce the experimental error.

The invention discloses a method for preparing an edible spoon for children, and belongs to the technical field of spoon preparation. In the present invention, bamboo fiber is soaked in hot acetic acid solution to obtain acetate acetate cellulose, and acetate acetate nanocellulose is obtained through ultrasonic treatment and centrifugation, and a certain concentration of chitosan solution and agar solution are prepared and blended. Chitosan / agar porous gel is obtained by crystallization, freezing, soaking in absolute ethanol, and then freeze-drying. The soup spoon has a low thermal conductivity; the materials used are all powdery and edible, and have no harm to the human body. After the agar touches the soup, it is easy to melt out and form a hydrophobic film on the surface of the soup spoon, so that the shape of the soup spoon does not change when it is used. The cellulose can prevent the spoon from forming fragments and causing damage to the oral cavity when it is broken, so that it will not cause physiological damage when used by children, and has broad application prospects.

The invention provides an anti-aging rubber sealing ring material and a preparation method thereof, and belongs to the technical field of rubber sealing materials. The preparation method of the anti-aging rubber sealing ring material comprises the following steps of weighing of raw materials by weight, raw material mixing, primary mixed material re-treatment, secondary rubber compound re-treatment, die assembly and vulcanization molding, edge cutting and trimming, and quality inspection and classification. The anti-aging rubber sealing ring material and the preparation method thereof have theadvantages that bauxite powder is dispersed in a raw material network structure, so that the wear resistance of a rubber gasket is improved; due to the use of a plasticizer, the vitrification temperature of rubber is reduced, the plasticity and fluidity of the rubber are enhanced, and the hardness and tensile stress of the rubber are reduced; nano silicon dioxide and quartz fiber are added, so that the pressure resistance, anti-aging performance and corrosion resistance of the sealing ring material are enhanced, and the phenomena of overflow and leakage are effectively prevented; the preparation process is simple, and the cost is low.

The invention belongs to the field of intelligent materials. The invention aims to provide a preparation method of an ionic electroactive driver based on carboxylated bacterial cellulose, and the driver is low in cost, excellent in performance and good in reliability. According to the technical scheme, the preparation method of the ionic electroactive driver based on carboxylated bacterial cellulose comprises the following steps: 1) preparing a bacterial cellulose dispersion liquid; 2) preparing a bacterial cellulose-polypyrrole dispersion liquid; 3) preparing a bacterial cellulose-polypyrrole-ionic liquid composite membrane; and 4) laying an electrode layer to prepare the bacterial cellulose-based ionic driver.

The invention relates to a high-solid epoxy coating as well as a preparation method and application thereof. The high-solid epoxy coating comprises 20-50 parts of liquid epoxy resin; 5-20 parts of solid epoxy resin; 5-15 parts of a reactive diluent; 0-20 parts of an organic solvent; the component B comprises the following raw materials in parts by weight: 60-100 parts of a Manny base curing agent; 0-40 parts of a polyamide curing agent; 0.5 to 3 parts of a curing accelerator; the weight ratio of the component A to the component B is 100: (15-35), and the curing accelerator is a compound of phenols and organophosphate. The phenol and / or organophosphate are / is used as the curing accelerator, so that the curing speed is increased, the curing temperature is reduced, and the purpose of further shortening the hard drying time under the condition of high solid content is achieved. Organophosphate containing carboxyl or hydroxyl as a functional group plays a role of a cross-linking agent, so that the coating forms a more compact net-shaped structure, and the strength and toughness of a paint film are more excellent. And the use of organophosphorus ester can improve the water resistance of the paint film. The paint film prepared by the invention has good water resistance.

The invention discloses an in-situ reinforcing and toughening urea resin moulding compound and a preparing method thereof. The preparing method is characterized by comprising the steps that 0.01-10 parts of polyvinyl alcohol is taken, dissolved into distilled water for 3 h at the temperature of 95 DEG C, prepared into a 5-20% water solution and cooled to the room temperature for use; the temperature of a reaction kettle is controlled to be 20 DEG C-80 DEG C, methanal, a polyvinyl alcohol water solution and 0.1-20 parts of toughening agent are placed into the reaction kettle and fully stirred to react for 10-100 min, then 41-62 parts of urea are added, the mixture is stirred to react for 10-120 min, then 0.3-2.5 parts of lubricating agent, 5-50 parts of crop fiber powder or methyl cellulose, and 0.1-2 parts of curing agent are added, after the mixture is fully mixed uniformly, the reaction kettle is closed, vacuum is started, the mixture enters a kneading and vacuum drying stage, the temperature of the reaction kettle rises to 60 DEG C-95 DEG C, the mixture is kneaded and dried for 60-300 min, and then vacuumizing, cooling and smashing are carried out, so that the reinforcing and toughening urea resin moulding compound is prepared.

The invention discloses a preparation method of cod skin gelatin composite hemostatic dressing, which comprises the following steps: (1) Preparation of gelatin / sodium alginate composite solution: dissolving sodium alginate in distilled water and stirring, then adding freeze-dried cod The gelatin is heated and stirred, and the gelatin / sodium alginate composite solution is obtained after vacuum degassing; (2) crosslinking: the gelatin / sodium alginate composite solution prepared in step (1) is subjected to a crosslinking reaction with a crosslinking agent; (3 ) Disinfection and sterilization: the product of step (2) is sterilized to obtain the cod skin gelatin composite hemostatic dressing. The hemostatic dressing prepared by the present invention is pure white as a whole, dense and free of impurities, and its physical properties are greatly improved, its tensile strength and water absorption are higher than those of existing products, its hemostatic performance reaches the hemostatic effect of existing products, and its microstructure is in a uniform porous shape , is suitable for cell adhesion, has good biocompatibility and in vivo degradability, and is a good biomedical dressing.

The invention relates to passion fruit and fermented bean curd flavored yogurt and a preparation method thereof. Specifically, the invention relates to a method for preparing the passion fruit and fermented bean curd flavored yogurt, and the method prepares the flavored yogurt by taking a passion fruit additive and a fermented bean curd additive as raw materials. The invention further relates to the passion fruit and fermented bean curd flavored yogurt prepared by the method. The flavored yogurt disclosed by the invention has the advantages that the flavored yogurt has double flavors of fermented bean curd and passion fruits, and being high in water-holding capacity and high in content of microorganisms; the flavored yogurt has a uniform and consistent color, and is faint yellow; the flavored yogurt has a uniform texture, has no bubbles, layering, clots and whey separating, and has moderate viscosity; the flavored yogurt tastes fine, smooth, refreshing and moderate in sweetness and sourness; and the flavored yogurt has a thick texture, a good taste and a stable structure state.