108results about How to "Limitation of scope of protection" patented technology

The invention discloses a small molecule quaternary phosphonium salt type N-halamine antibacterial agent and a preparation method thereof. The antibacterial agent is prepared by integrating a quaternary phosphonium salt group and a N-halamine group into a single molecule by chemical covalent bond, solves the problem of poor hydrophily of N-halamine molecules, and retains the respective advantages of two antibacterial agents including N-halamine and quaternary phosphonium salt unit respectively, the antibacterial agent is good in sterilization effect, cost is low, technological process is simple, and the small molecule quaternary phosphonium salt type N-halamine antibacterial agent is suitable for medical treatment and public health, food safety, environmental protection, and many other fields.

The invention provides a preparation method of a nanocellulose composite polysulfone hollow fiber membrane. The preparation method comprises the steps that a membrane casting solution and a core solution are extruded through an annular spinning head of an immersion precipitated phase inversion spinning device at the same time to form a tubular liquid membrane, wherein the membrane casting solution comprises polysulfone, nanocellulose, polyethylene glycol and sulfonated polysulfone; the tubular liquid membrane passes through an air gap to enter a coagulating bath to be solidified, the tubular liquid membrane is placed in water to be soaked and cleaned, and the nanocellulose composite polysulfone hollow fiber membrane is obtained. The nanocellulose is used as a reinforcing agent and a hydrophilic modifying agent, and the mechanical strength and hydrophilism of the polysulfone membrane are improved; the polyethylene glycol is used as a dispersing agent for the nanocellulose and a hydrophilic modifying agent for the polysulfone membrane, the compatibility between the nanocellulose and polysulfone and the hydrophilism of the polysulfone membrane are improved, and therefore the prepared nanocellulose composite polysulfone hollow fiber membrane has the advantages of being high in strength and good in hydrophilism. In addition, the preparation method is simple in technology.

The invention provides a preparation method of a graphite oxide acetylene nanosheet achieving water photolysis oxygen generation under visible light. The method for preparing the graphite oxide acetylene nanosheet is simple, efficient and low in cost. The prepared graphite oxide acetylene nanosheet has abundant oxygen-containing functional groups on the surface and excellent dispersion in water, and is beneficial to improvement of light absorption; the graphite oxide acetylene nanosheet has the uniform size and ultra-thin thickness, and is beneficial to separation and transmission of photo-induced electrons and holes, and the performance of water pohotolysis oxygen generation under the visible light is improved. The prepared graphite oxide acetylene nanosheet material has good absorption in the visible light range, and the energy band structure meets the requirement of catalyzing water for decomposition to generate oxygen under visible light irradiation, and thus high-performance visible light water pohotolysis oxygen generation is achieved. In addition, the graphite oxide acetylene nanosheet material still show the excellent water pohotolysis oxygen generation performance under irradiation of near-infrared light (lambda=660 nm).

The invention provides a nanometer titanium dioxide preparation method. Ammonium hexafluorotitanate doped with the following nonmetal elements: N, F and B enhances the photocatalysis effect of nanometer titanium dioxide under the action of boric acid; a silver nitrate solution added in the invention is doped with the metal element Ag, and the metal element Ag and the nonmetal elements are co-doped to generate synergism, so the catalysis activity of nanometer titanium dioxide is greatly improved. Butyl titanate is hydrolyzed to generate a nanometer titanium dioxide sol, and a titanate coupling agent and polystyrene are directly used to modify the nanometer titanium dioxide sol, so the method has the advantages of simple process and mild reaction conditions; and the nanometer titanium dioxide modified by the titanate coupling agent and polystyrene has good thermal stability and dispersibility.

The invention discloses a sodium alginate microballoon vein suppository containing hemangioma-resisting medicant, a preparation method and an application thereof. The sodium alginate microballoon vein suppository comprises carrier sodium alginate and hemangioma-resisting medicant; the sodium alginate covers the hemangioma-resisting medicant; the weight ratio of the sodium alginate to the hemangioma-resisting medicant is 5:1-60:1; and the hemangioma-resisting medicant is pingyangmycin, sodium morrhuate, carbamide or bleocin. The raw materials used in the invention have favorable mechanical strength, biocompatibility, biological degradability and stability, have no organic solvent, and are basically harmless to functions of hemopoietic system and immune system, thereby suppository can be industrially produced.

A reduction process for Fischer-Tropsch synthesis of iron-base catalyst in slurry bed includes adding liquid-phase hydrocarbon medium and catalyst to slury-bed reactor, displacing air, programmed heating, reducing catalyst by H2 and then by CO, and Fischer-Tropsch synthesis.

The invention discloses a sodium alginate targeted sustained release microsphere vascular occlusive agent containing Sorafenib as well as a preparation and application thereof. The invention is characterized by comprising carrier sodium alginate and antitumor targeted drug Sorafenib; the sodium alginate wraps the Sorafenib; the Sorafenib is 1 portion by weight and the sodium alginate is 1 to 30 portions by weight. The vascular occlusive agent leads the oral targeted drug to achieve the purpose of interventional embolotherapy by an interventional embolotherapy method for changing preparation formulation and changing the drug administration way, simultaneously leads Sorafenib of the antitumor drug to be directly located to cancer tissues in a fast and long-acting manner from local target areas, has strong pointedness and obvious effect, does not damage normal tissues while cutting blood supply of tumor and inhibiting growth of the tumor cells, has high drug concentration in local target areas and little drug amount for the whole body, better and effectively protects the self immune system of patients and reduces toxic and side effects and the like.

The invention provides a PET (Polyethylene Terephthalate) protection film and a preparation method thereof. The PET protection film is prepared from a PET base material layer, a low-viscous middle layer and a protection layer; the preparation process is simple and easy to operate. A 1-methyl-3-benzoyl peroxide imidazole bromine ionic liquid is used as an initiator and is the green and environmental-friendly ionic liquid, the polymerization reaction rate is controlled, and a molecular chain is further crosslinked, so that the viscosity of a low-viscosity middle layer can be effectively reduced,and high-temperature resistance is also improved; in addition, the 1-methyl-3-benzoyl peroxide imidazole bromine ionic liquid and an emulgator have a better synergistic effect, so that the stabilityof a polymer emulsion is improved, and the combination property of the PET protection film is improved. Therefore, the PET protection film prepared by the invention has the characteristics of long service life, environmental protection, good transparency, low viscosity, good high temperature resistance and excellent mechanical property.