3 results about "Porous silicon" patented technology

The invention relates to the field of materials, in particular to preparation of a disordered porous silicon dioxide material and application of fatty alcohol-polyoxyethylene ether to preparation of the disordered porous silicon dioxide material. The fatty alcohol-polyoxyethylene ether has the structural formula RO-(CH2CH2O)n-H, wherein R is C8-24 and n is 9 to 30. The fatty alcohol-polyoxyethylene ether serves as an additive for preparation of the disordered porous silicon dioxide material. Compared with the material prepared by the conventional method, the disordered porous silicon dioxide material has extremely high monodispersity and uniform and adjustable size. The preparation process is simple, short in cycle, easy in large-scale production and wide in application field. In addition, contents such as nanogold, platinum, luminous quantum dots or magnetic particles and the like can be embedded in advance or introduced after the material is prepared and the surface functional group can be modified, so that the using filed is further enlarged.

The invention discloses a seafood fresh-keeping agent capable of removing a peculiar smell. The seafood fresh-keeping agent is prepared from the following substances in parts by weight: 80 to 90 partsof deionized water, 10 to 20 parts of potassium sorbate, 2 to 5 parts of an antioxidant, 1 to 4 parts of porous silicon dioxide, 0.1 to 0.3 part of natamycin and citric acid for regulating pH (Potential of Hydrogen) to be 4.0 to 5.0. The potassium sorbate and the natamycin which have an anti-bacterial effect are added in the seafood fresh-keeping agent, so that propagation of bacteria in seafoodcan be effectively inhibited. In addition, oil-soluble vitamin C having oxidation resistance is also added in the seafood fresh-keeping agent, and the vitamin C is adsorbed to the porous silicon dioxide, so that a sustainable anti-oxidant function is expressed. According to the seafood fresh-keeping agent disclosed by the invention, a sour formula is adopted, and decomposition of an odor source-chlorinated trimethylamine in the seafood is also inhibited to a certain degree. The seafood fresh-keeping agent not only is capable of expressing anti-corrosion and fresh-keeping effects of the seafood, but also is capable of effectively reducing a peculiar smell of the seafood.

The invention discloses a preparation method of a porous silicon rubber nano composite material. The method comprises the following steps: firstly, sufficiently stirring silicon rubber, nano aluminum oxide, borax and allyl acetoacetate in a sealed rubber mixing machine for 1h to 2h, so as to obtain a mixture; secondly, after mixing and stirring residual raw materials for 3h, reacting for 0.5h to 1h in a reaction kettle at 150 DEG C to 200 DEG C; after reacting, conveying the materials into a double-screw granulator for granulating, so as to form master batch; finally, after sufficiently stirring the obtained master batch and the mixture by a stirrer for half an hour, conveying same into a double-screw extruder for fusing and extruding; cooling and dicing to obtain the porous silicon rubber nano composite material. The preparation method disclosed by the invention has the advantages of relatively short flow, simplicity in operation, low cost, environmental friendliness and high economic benefits. Compared with the prior art, the nano composite material prepared by the method disclosed by the invention has a porous characteristic and tissues can grow in the nano composite material; the excellent physical, chemical and mechanical properties and the like are better than those of related existing products in the market.