46results about How to "Good dispersion and stability" patented technology

The invention discloses phosphorylcholine structure-modified graphene oxide and a preparation method thereof. The phosphorylcholine structure-modified graphene oxide is formed by connecting at least one oligomer containing a phosphorylcholine structure to a graphene oxide slice by a chemical grafting mode. The phosphorylcholine structure-modified graphene oxide is chemically grafted with the hydrophilic phosphorylcholine structure, so that the phosphorylcholine structure-modified graphene oxide is high in dispersibility and stable in water, saline and cell culture fluid, and can be placed at room temperature for a long term and does not have precipitate. The phosphorylcholine structure is an inherent compound such as a part of phospholipid in an organism, so that the phosphorylcholine structure-modified graphene oxide possibly has biocompatibility and is possibly applied to the biomedical field. The preparation method for the phosphorylcholine structure modified graphene oxide is simple, convenient and reliable and is easy to implement.

The invention relates to compound vitamin nanoemulsion belonging to the technical field of pharmacy. Every 1000 ml of nanoemulsion is prepared by the method comprising the following steps of: fully mixing 35-50g of AEO-9 or AEO-4, 150-200g of tween-80, 16-22g of phenylcarbinol and fat-soluble active ingredients at 30-60 DEG C to prepare an oil phase; adding water to dilute the oil phase; adding water-soluble active ingredients; evenly mixing; adding water to dilute and confirm solution contents and adding water to dilute to a volume, wherein the fat-soluble active ingredients comprise 6-18 million IU of vitamin A, 1.8-4.8 million IU of vitamin D3 and 2.5-7.5g of vitamin E, and the water-soluble active ingredients comprise 1-4g of vitamin B1, 0.2-1.0g of vitamin B2, 1.6-4.2g of vitamin B6, 5-25g of barberry extractive and 30-60g of amino acid. The product is clear and transparent, has good stability, slow-release effect, persistent drug effect, great specific surface area of nanoemulsion particles and good system compatibility, can obviously improve the drug absorption rate and the bioavailability and can be compounded with various useful elements besides vitamins.

The invention provides a synthetic method of copper nano-particles of different shapes. The method comprises the following steps: selecting one of copper salt compound cupric sulfate, copper chloride dihydrate and copper nitrate, using L-ascorbic acid as a reducing agent, dropwise dripping L-ascorbic acid solutions of different concentrations in a copper salt compound water solution, controlling the temperature, continuously stirring to obtain the copper nano-particles of different shapes, and realizing the control to the shapes of the copper nano-particles by changing the concentration of the L-ascorbic acid added in the system. The method has the characteristics of few raw material kinds, simple and convenient operation method, simple process, environmental protection and the like, and can control the shapes of the copper nano-particles directionally, and the obtained copper nano-particles are good in dispersivity and stable, and do not settle for a long time in the system.

The invention discloses a broad-spectrum high-efficiency antibacterial masterbatch based on nano-cluster technology and a preparation method thereof, and the method particularly comprises the following steps: dispersing nanometer silver powder into a nonpolar or weak-polar solvent, adding polypropylene slices and dissolving the slices; removing the solvent by heating reflux, drying and grinding into powder, and finally performing screw extrusion to obtain the broad-spectrum high-efficiency antibacterial masterbatch based on nano-cluster technology. The antibacterial masterbatch produced by the method has excellent dispersibility, and good stability; the production process is simple; the solvent is recyclable, green and environment-friendly; the product has the excellent performance of strong versatility, lasting antibacterial activity, and reprocessability, and has wide applicability.

The invention provides an ultra-dispersed photocatalyst which is prepared from 90-110 parts of an alcohol solvent, 2-6 parts of titanium dioxide and 10-14 parts of a dispersing agent. The ultra-dispersed photocatalyst is a semi-transparent solution, the primary particle size of titanium dioxide is 10-50 nm, the secondary particle size of titanium dioxide is 100 nm, and the ultra-dispersed photocatalyst is safe, free of toxin and remarkable in catalytic effect. The ultra-dispersed photocatalyst mainly has the advantages that firstly, a photocatalysis response in the ultraviolet and visible light full-spectrum range is achieved; secondly, the photocatalyst is suitable for combustion catalysis of fuel; thirdly, the photocatalyst can remarkably reduce emission and is safe and environmentally friendly. A preparation method of the ultra-dispersed photocatalyst has the advantages that high dispersing of nano titanium dioxide in the alcohol solvent is achieved; part of titanium ion self-doping features are obtained, the forbidden band width is reduced, and the photocatalysis response in the ultraviolet and visible light full-spectrum range is achieved; cost is reduced. Application of the ultra-dispersed photocatalyst is not limited to indoor environment pollution, sterilization and deodorizing, and the ultra-dispersed photocatalyst can be directly applied to combustion catalysis of fuel, particularly combustion catalysis of fuel of automobile internal-combustion engines.

The invention relates to the decoration of building exterior walls, and particularly relates to a decorative layer of a yellow high-strength concrete decorative hanging plate. According to the scheme, the decorative layer is prepared from the following raw materials in parts by weight: 400-800 parts of cement, 720-900 parts of sand with particle size of 10-40 meshes, 180-260 parts of sand with particle size of 70-140 meshes, 100-250 parts of sand with particle size of 325 meshes, 40-120 parts of water reducer, 120-160 parts of water, and 0-4 parts of iron yellow pigment. On the basis of the prior art, the hanging plate can be closely connected with a structural layer of the exterior wall hanging plate by adopting a manner of matching cement base stock with multilevel specific sand, so that the connection strength can be greatly enhanced, and stripping can be avoided.

An aqueous ophthalmic composition includes a carbonic anhydrase inhibitor; at least one cellulose derivative selected from the group consisting of hydroxypropylmethyl cellulose acetate succinate and carboxymethylethyl cellulose; and water.