42results about How to "No threat to health" patented technology

The invention discloses a flexible transparent electric conducting film and a manufacturing method thereof. The electric conducting film comprises a flexible transparent base plate, wherein a transparent oil ink layer is coated on the surface of the flexible transparent base plate; the surface layer of the transparent oil ink layer is an electric conducting layer pasted with nano silver wires; and the nano silver wires in the electric conducting layer are mutually overlapped so as to form a uniform two-dimensional nano silver wire network. The preparation method comprises the following steps of: printing or coating the transparent oil ink on the flexible transparent base plate; coating a nano silver wire dispersing liquid uniformly on the surface of another flexible transparent base plate so as to obtain a nano silver wire thin film; and through a hot pressing or transfer printing mode, transferring and pasting the thin film to the surface layer of the transparent oil ink so as to obtain the flexible transparent electric conducting film. The electric conducting film surface provided by the invention is lower in resistance value and is high in bonding force of each layer, has favorable contact, and has good uniformity; and the preparation method is simple in technology and is low in cost, and can prepare large-area transparent electric conducting films, and the prepared transparent electric conducting film has favorable electric conducting performance.

The invention provides a formula of a special water purifying agent for aquaculture. The formula is prepared from the following components by weight percent: 5 to 30 percent of isopropylamine, 5 to 20percent of water, 8 to 25 percent of L-carnitine, 10 to 20 percent of epichlorohydrin, 1 to 10 percent of absolute ethyl alcohol, 3 to 20 percent of OP-10, 0.5 to 3 percent of elemental iodine, and 1to 12 percent of phosphoric acid. The product is a nontoxic and pollution-free environment-friendly product, can effectively inhibit the growth of viruses, bacteria, fungi, harmful algae and the like, has the characteristics of high efficiency, durability, high penetrating capacity, small application dosage and the like, and can be widely used for purifying culture water and preventing diseases of aquaculture animals. The product is the water purifying agent and is specially used for sterilizing and purifying the culture water; and meanwhile, the water purifying agent is also used for preventing and treating skin ulcer syndrome, stomach ulcer disease and piebald syndrome of sea cucumbers, and white spot syndrome, early death syndrome, acute hepatopancreas necrosis and the like of shrimps.

The invention relates to glycidyl methacrylate (GMA) graft modified polyvinyl acetate-based reverse core-shell emulsion and a preparation method thereof, belonging to the technical field of emulsion adhesive. The GMA graft modified polyvinyl acetate-based reverse core-shell emulsion is mainly prepared from a first core layer monomer, a second core layer monomer, a shell layer monomer, a graft monomer, a composite emulsifier, an initiator, a pH buffering agent, deionized water and a functional monomer, wherein the first core layer monomer is vinyl acetate, the second core layer monomer is butylacrylate, the shell layer monomer is styrene, the graft monomer is maleic anhydride, the composite emulsifier is a mixture of PCA507 and PCA078, the initiator is ammonium persulfate, the pH buffer isNaHCO3, and the functional monomer is GMA. The raw materials used in the preparation method are cheap and easy to obtain; the prepared functional monomer GMA modified core-shell composite emulsion type adhesive is non-toxic, harmless and simple in production and use process, and can be directly used as water-based adhesive.

The invention discloses a preparation method of a biological multilayer nerve conduit containing mesenchymal stem cells. The method comprises the following steps: (1) dissolving a photocurable biological hydrogel with a PBS solution containing a photoinitiator to obtain two concentrations of biological ink; (2) collecting mesenchymal stem cells with confluence degree of more than 80%, and resuspending the mesenchymal stem cells with low concentration of biological ink after treatment to obtain cell-loaded biological ink; 3) load that cell-loaded biological ink and the high-concentration biological ink into two nozzles of the biological 3D printing device respectively; (4) setting printing parameters, firstly printing the cell-carrying biological ink on the optical axis rotating uniformly to obtain a first layer of nerve conduit; And then printing high-concentration biological ink to obtain a double-layer hollow tubular nerve conduit; (5) Biological multilayer nerve conduit was obtainedby ultraviolet irradiation. The invention has the advantages of short preparation time, simplicity, mild operation conditions, simple structure, good biocompatibility and degradability of the prepared nerve conduit.