40results about How to "Good biological inertia" patented technology

The invention provides a gel-based pH sensor and a preparation method thereof, belonging to the technical field of intelligent high molecules and sensors. The pH sensor is a composite material which takes polyvinyl alcohol gel as a matrix, and immobilizes and buries poly(acrylamide/methylacrylic acid) gel microspheres and immobilizes Congo red. The preparation method comprises the following steps: preparing a poly(acrylamide/methylacrylic acid) gel microsphere suspension; adding the microsphere suspension to polyvinyl alcohol aqueous liquor to crosslink and gelatinize; soaking a gel film in the Congo red for soaking, alkali treatment and washing to obtain a product. The gel-based pH sensor provided by the invention has the characteristics of absorbancy response and color response, so that visual simple measurement and precise measurement of pH value can be realized, and the using agility and application field of the pH gel sensor can be remarkably improved.

The invention discloses a medical infusion bag. The infusion bag is manufactured by using polypropylene and polyethylene and styrene-ethylene/butylene-styrene block copolymer. The infusion bag manufactured by adopting the technical scheme has the advantages that: the air-tightness and the steam resistance are excellent, the chemical stability is high, and the infusion bag is suitable to be used for manufacturing liquid medicinal products requiring high-temperature disinfection and sterilization; the transparence is high, and the detection of foreign materials when the infusion bag is produced and used is ensured; the softness is high, the falling resistance is high, the heat-sealing property is high, the high-temperature resistance is high, and the infusion bag can be sterilized at the temperature of 121 DEG C; because the infusion bag does not contain halogens, the infusion bag does not cause any environmental pollution when processed after use; and simultaneously, the barrier property is high, the chemical inertness and the biological inertness are high, the compatibility with medicaments is good, and the infusion bag can be used for packaging various kinds of common fluid, enteral nutrient fluid, parenteral nutrient fluid, dialyzate, flushing fluid, treating type large-capacity injection and the like.

The invention provides a high resistance and high temperature braising and cooking tearable membrane. The invention is characterized in that the invention consists of three layers of macromolecule material with good compatibility and close molecule structure, with the external layer is modified polyalkenes, the middle layer is multi-copolymerized polypropylene and the internal layer is terpolymer (ethene-ethylene-propylene butene). The modified polypropylene is metallocene modified polypropylene. The modified polypropylene occupies the proportion of 20% to 25%, the multi-copolymerized polypropylene occupies 50% to 60%, and the ethene-ethylene-propylene butene copolymer occupies 20% to 25%. The invention has extremely good biological inertia innocuity and is suitable for food packages; the invention does not generate the deformation, has wide applicable range, ensures the storages of convenient foods, children food, jelly, soft can, etc. not to be mortified or deteriorated, and reaches the requirement of asepsis (F0 is more than 8); the invention does not generate poisonous matters in the application and recovery process, has no pollution and belongs to environmental protective product.

The invention belongs to the technical field of high polymer materials, and particularly discloses a heat-resistant insulating resin composition. The heat-resistant insulating resin composition comprises the following raw materials in parts by weight: 60-80 parts of polypropylene resin, 22-35 parts of polyacrylate rubber, 15-26 parts of polyurethane rubber, 7-15 parts of polyisobutene grafted maleic anhydride, 15-30 parts of plasticizing agent, 5-10 parts of fire retardant, 5-10 parts of antioxidant, 3-6 parts of anti-aging agent, 4-8 parts of crosslinking agent and 1-2 parts of assistant crosslinking agent. The heat-resistant insulating resin composition disclosed by the invention has excellent mechanical property, flame retardant property and high temperature resistance.

The invention relates to a novel multilayer co-extrusion medical transfusion film and a preparation method of the novel co-extrusion medical transfusion film. The materials of the novel multilayer co-extrusion medical transfusion film are divided into five layers in composition, wherein the first layer is an internal layer A and the ingredient of the internal A is polypropylene catalyzed by metallocene; the second layer is a bonding layer B and the ingredient of the bonding layer B is an ethylene-vinyl acetate copolymer; the third layer is a core layer C and the ingredient of the core layer C is mixed resin composed by random copolymerization polypropylene and an ethylene-alpha-octylene copolymer; the fourth layer is a bonding layer D and the ingredient of the bonding layer D is an ethylene-alpha-octylene copolymer; and the fifth layer is a weather-resistant layer E and the ingredient of the weather-resistant layer E is mixed resin composed by a random copolymerization polypropylene material, a styrene-ethylene-bivinyl rubber-styrene copolymer, and an ethylene-alpha-octylene copolymer. A multilayer co-extrusion technology is adopted in the preparation. The multilayer co-extrusion medical transfusion film provided by the invention has the advantages of high transparency, good weather-resistance and flexibility, wear resistance and the like, and is particularly appropriate for use as a packaging material in the field of medicine.

The invention provides a polyurethane/ceramic composite biological filler for sewage treatment and a preparation method. The preparation method comprises the following steps: mixing an anionic chain extender, isocyanate and polyethylene glycol, adding a triethylene diamine liquid catalyst, and carrying out reaction to prepare a polyurethane prepolymer; adding a proper amount of acetone, performingcooling, adding triethylamine and lactide, and performing stirring to obtain waterborne polyurethane; pre-treating municipal sludge, mixing pre-treated municipal sludge with natural magnesium aluminum silicate and aluminum oxide, carrying out dry ball milling, and performing treating to obtain ceramic with abundant porous structures; and placing the porous ceramic in a mixed solution of sodium alginate and absolute ethyl alcohol to be mixed, and then adding waterborne polyurethane, wherein the biocompatibility of the material can be enhanced through the waterborne polyurethane and the sodiumalginate. Therefore, the polyurethane/ceramic composite material prepared by the method integrates the advantages of high mechanical strength, large specific surface area and high porosity of the porous ceramic, and has the advantages of good biocompatibility, easiness in biofilm formation, high strength, easiness in backwashing and the like when being used as a biological filler.

The invention discloses a fluorine-containing polysiloxane non-stick additive as well as a preparation method and application thereof. The additive has a molecular formula 1 shown in the specification and is prepared through hydrosilylation reaction between fluorine-containing silicone oil with reactive groups and silane in the presence of a platinum catalyst. The non-stick additive and the preparation method have the beneficial effects that as fluorine-containing polysiloxane has low surface energy, solvent resistance, flexibility and high and low temperature resistance, the coupling agent can carry out key joint with most materials, endow base materials with good hydrophobicity, lipophobicity and pollution resistance and achieve the effect of improving the non-stick property of coatings; and the preparation method is simple, is mild in preparation conditions, has good repeatability, is high in yield and has wide application prospects.

The embodiment of the invention provides an aqueous environmentally-friendly nano-copolymer multifunctional defoamer and a preparation method thereof. The raw materials of the defoamer comprise, by mass, 20-26% of a natural vegetable fatty alcohol, 10-15% of a higher fatty alcohol, 5-10% of an amide, 5-8% of a nano-hydrophobic agent, 0.5-1% of a fluorine monomer, 3-6% of a silane, 2-5% of an initiator, 1-2% of an active polymerization agent, 0.5-1% of a catalyst, 1-2% of a thickener, 1-2% of an antifreeze agent and 30-45% of deionized water. The defoamer provided by the embodiment of the invention is prepared by raw material selection and a copolymerization synthesis mode, a nano-material group is introduced to change the polymer structure, and harmful substances such as a conventional emulsifier, formaldehyde and silicone oil are not used, so the versatility, the weather resistance, the stain resistance, the high corrosion resistance and the auto-cleaning property are improved. The product can be decomposed by hydrolysis, photodegradation and biodegradation without causing cumulative effects, so the product is very safe to water sources and the environment.

The invention provides polydopamine perfluorohexane nanoliposome and a preparation method and application thereof, and relates to nano materials and biomedical materials. The preparation method comprises the steps that 1), perfluorohexane is subjected to ultrasonic emulsification and dispersion in ultrapure water to form uniform nano emulsion; 2), the nano emulsion is blended with ammonium hydroxide and an ethanol solution, a dopamine hydrochloride solution is added, and stirring, centrifuging and cleaning are conducted; 3), ferrous lactate is added into a perfluorohexane-polydopamine nanoparticle solution, and stirring, centrifuging and cleaning are conducted; 4), soybean lecithin, cholesterol and distearoyl phosphatidyl ethanolamine are dissolved in dichloromethane, a liposome film is synthesized through a rotary evaporator, and a liposome film solution is subjected to ultrasonic dispersion; and 5), the liposome film solution is added into the nanoparticle solution in the step 3), ultrasonic dispersion and self-assembly are conducted, centrifuging and cleaning are conducted, and the polydopamine perfluorohexane nanoliposome is obtained. The defect that perfluorohexane is insoluble in water is overcome, the size of nanoparticles is small, the nanoparticles can be passively targeted to tumor cells through the high-permeability long-retention effect, tumor microenvironment hypoxia is improved, and iron death of the tumor cells is triggered.

The invention discloses a composite film, and a preparation method and applications thereof. The preparation method comprises the following steps: mixing vinyl-terminated fluorosilicone oil with hydrogen-containing silicone oil, chloroplatinic acid, a reaction solvent and a reaction inhibitor, stirring at 30-45 DEG C, and stopping stirring when the viscosity reaches 40-80 mPa*s so as to obtain a fluorine-modified silicone rubber solution; mixing cellulose acetate, dimethylacetamide, ethylenediamine propyl methyl dimethoxy silane and polyethylene glycol 400, stirring at 55-70 DEG C for 18-36 hours, coating the surface of non-woven fabric with an obtained mixture by blade coating, and carrying out phase inversion in water bath to obtain a base film; and uniformly coating the surface of the base film with the fluorine-modified silicone rubber solution, and crosslinking at 80-100 DEG C for 3-5 hours to obtain the composite film. The composite film is excellent in anti-pollution performance, and solvent resistance; the binding strength of the base film layer with an active film layer is high, the service life in yellow rice wine is long, separation of alcohol and aroma components in yellow rice wine can be realized effectively, clarified and transparent high alcohol concentration yellow rice wine can be prepared, and the turbidity of the yellow rice wine before penetrating through the composite film is high, and the composite film can be used for wine mixing or beverage mixing or further fermentation preparation of rice vinegar and other products.

The present invention provides a perfluorocarbon oxygen-carrying microsphere and a preparation method and an application thereof. The preparation method comprises the following steps: preparing perfluorocarbon into an emulsion, oxygenating and disinfecting the perfluorocarbon emulsion which is soluble in water and can carry oxygen, wrapping the emulsion in carboxymethyl chitosan to form microspheres, and connecting folic acid on surfaces of the microspheres to realize a targeting function. The perfluorocarbon oxygen-carrying microsphere is applied in treatments of tumors and alleviation of hypoxia. The perfluorocarbon is used as an oxygen-carrying material and wrapped in the carboxymethyl chitosan, and then the folic acid molecules are grafted to form the microspheres with a core-shell structure. The microsphere can realize a slow release effect of oxygen, besides, the shell layer material has good biocompatibility and targeting property, so that the microsphere can relieve an oxygen deficiency problem of a tumor part, realizes a function of slowly releasing oxygen at an oxygen deficiency part, and achieves a purpose of treating tumors. The perfluorocarbon oxygen-carrying microsphere is simple in the preparation method and convenient to operate, and the prepared oxygen-carrying microsphere can be stored for a long time.

The invention is applicable to the field of polymer materials, and provides a polymer, its preparation method and application. The polymer has the following structural formula. The polymer comprises poly oxazoline group and hydroxyl, carboxyl, amino, sulfydryl, azide group or trimethylsilyl group and triethoxysilyl group, the polymer has excellent biological inert, stability and easy synthesis property due to the poly oxazoline group, and due to the hydroxyl, carboxyl, amino, sulfydryl, azide group or trimethylsilyl group and triethoxysilyl group and other active functional groups, cross-linking reaction of the polymer and functional groups with other properties can be performed, so that the range of application of the polymer is greatly widened; according to the preparation method of the polymer, through the introduction of the poly oxazoline group and other active functional groups, the proposes that the polymer has the excellent biological inert, stability and easy synthesis property and the cross-linking reaction of the polymer and the functional groups with other properties can be performed can be realized.

The invention relates to a method for preparing a lining material of a fire hose and belongs to the technical field of fire fighting. The method comprises the following steps: by taking silicone rubber as a raw material of a lining material, doping the silicon rubber with cerium oxide and an aluminum alloy, and preparing a hydrotalcite-like thin film on the surface of the silicon rubber by using an in-situ growth method, so as to prepare a lining material of a fire hose with good oil resistance and corrosion resistance. The silicone rubber has excellent weather resistance, high and low temperature resistance, electrical insulation, radiation resistance and biological inertia; because of a special electron structure (an f electron layer is underfill) of rare earth cerium, a complex can be easily formed, the formed complex is capable of inhibiting swelling of rubber in a solvent by preventing chain segment movement of rubber molecules, and then the oil resistance of the rubber can be improved; and when the hydrotalcite-like thin film is in contact with a solution, original anions in layers have an exchange reaction with anions in the solution, corrosive ions in layers can be contained in layers, contact of a substrate with the corrosive ions can be inhibited, and thus the purpose of inhibiting corrosion can be achieved.

The invention discloses damping cloth with good wear resistance and a preparation method thereof. The damping cloth comprises base cloth and a wear-resistant coating; the preparation method comprises the following steps: 1, uncoiling the base cloth, immersing the base cloth into a soaking tank containing an anionic surfactant and water in a mass ratio of 1:100 through a cloth storage rack, then squeezing water in the base cloth to be dry through a squeeze roller, and ironing the base cloth to be half-dry through an ironing wheel; and 2, putting the half-dry base cloth on a coating table, uniformly coating the base cloth with the wear-resistant coating by adopting a coating knife coating method, then putting the base cloth into a curing tank for curing at the temperature of 40-60 DEG C, washing the cured cloth with water in a washing tank, and finally performing the procedures of drying, sizing, rolling, buffing and shearing to obtain the damping cloth with good wear resistance. The damping cloth has high wear resistance, and also has antibacterial and waterproof properties.

The invention discloses an insulating resin composition with a good flame retardant property. The insulating resin composition comprises the following raw materials: polypropylene resin, acrylate rubber, polyurethane rubber, polyisobutylene grafted maleic anhydride, a plasticizer, antimony trioxide, an antioxidant, an anti-aging agent, a cross-linking agent and an assistant crosslinker, and silicone rubber. The insulating resin composition is special in surface properties, low in water absorption, no breeding effect on various algae and molds, good in mold resistance, good in thermal conductivity and air permeability, greatly different in gas permeability of different gases, odorless and tasteless, and extremely good in antithrombotic properties and biological inertness, and used in combination with the polypropylene resin, the acrylate rubber and the polyurethane rubber, so that the heat resistance and the flexibility of the insulating resin composition are further improved.

The invention discloses an insulating resin composition with good flexibility. The insulating resin composition is prepared from the following raw materials: a polypropylene resin, polyacrylate rubber, polyurethane rubber, polyisobutene grafted maleic anhydride, a plasticizer, antimonous oxide, an antioxidant, an anti-aging agent, a crosslinking agent, an assistant crosslinker and silicon rubber.The insulating resin composition has special surface properties, is low in water absorption, has no propagation function on various algae and mold, is good in mold resistance, heat conduction and airpermeability, in addition has great air permeability differences for different gases, is non-odorous and tasteless, has very good thrombus resistance and biological nonreactivity, and can be used together with the polypropylene resin, the polyacrylate rubber and the polyurethane rubber, and the thermal resistance and the flexibility of the insulating resin composition can be further improved.