Efficient keyboard cleaning solution,Preparation of aramid fiber modifying solution,Biological pollution resistant reverse osmosis composite membrane and preparation method thereof

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3 results about "Tannic acid" patented technology

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Tannic acid is a specific form of tannin, a type of polyphenol. Its weak acidity (pKₐ around 6) is due to the numerous phenol groups in the structure. The chemical formula for commercial tannic acid is often given as C₇₆H₅₂O₄₆, which corresponds with decagalloyl glucose, but in fact it is a mixture of polygalloyl glucoses or polygalloyl quinic acid esters with the number of galloyl moieties per molecule ranging from 2 up to 12 depending on the plant source used to extract the tannic acid. Commercial tannic acid is usually extracted from any of the following plant parts: Tara pods (Caesalpinia spinosa), gallnuts from Rhus semialata or Quercus infectoria or Sicilian Sumac leaves (Rhus coriaria).

Efficient keyboard cleaning solution

InactiveCN104312761AQuick clean upProtect healthSurface-active detergent compositionsDetergent compounding agentsTriclosanGlycerol

An efficient keyboard cleaning solution is prepared from the following raw materials by weight: 5-11 parts of tannic acid, 4-8 parts of triclosan, 2-6 parts of licorice, 1-5 parts of borneol, 4-8 parts of Chinese violet, 3-9 parts of citric acid, 4-6 parts of glycerol, 5-9 parts of polyvinylpyrrolidone, 2-6 parts of triethanolamine oleate, 1-3 parts of gallnut, 2-7 parts of didecyl dimethyl ammonium chloride, 4-6 parts of sodium gluconate and 1-5 parts of decyl dimethyl ammonium chloride. The invention has the beneficial effect that the efficient keyboard cleaning solution can quickly clean the keyboard, also has certain sterilization effect for the protection of human health, and does not affect the normal use.

Owner:QINGDAO TORIX ELECTRONICS TECH

Preparation of aramid fiber modifying solution

InactiveCN109403040AImprove surface roughnessTightly boundFibre typesEpoxyPolyphenol

The invention discloses preparation of an aramid fiber modifying solution and relates to a surface modifying method of aramid fibers. The aramid fiber modifying solution comprises a pretreatment solution and a re-treatment solution, wherein the pretreatment solution is prepared from 180-200 parts of toluene, 16-18 parts of polymethylene polyphenyl polyisocyanate and 3-6 parts of epoxy resin; the re-treatment solution is prepared from 180-220 parts of deionized water, 8-12 parts of A-stage resorcinol-formaldehyde resin, 8-16 parts of 25%-30% ammonium hydroxide, 160-200 parts of butadiene-vinylpyridine latex, 5-10 parts of 36%-40% of a formaldehyde solution, 0-5 parts of tannic acid and 0-5 parts of tea polyphenol. By treating the aramid fibers with the solution, surface roughness of the aramid fibers can be improved effectively, quantity of active groups on the surface of the aramid fibers is increased, and adhesiveness of the aramid fibers with different kinds of rubber is improved.

Owner:烟台泰和工程材料有限公司 +1

Biological pollution resistant reverse osmosis composite membrane and preparation method thereof

ActiveCN112973473AGood rejectionImprove antibacterial propertiesMembranesGeneral water supply conservationUltrafiltrationReverse osmosis

The invention discloses a biological pollution resistant reverse osmosis composite membrane and a preparation method thereof. The preparation method comprises the following steps: contacting a porous ultrafiltration support layer with a tannic acid aqueous solution; contacting with a ferric salt aqueous solution; contacting with a silver nitrate solution; contacting with a polyamine aqueous solution; and contacting with a multi-acyl chloride solution, drying in air at room temperature, and soaking in pure water to obtain the biological pollution resistant reverse osmosis composite membrane. Test results show that the anti-biological pollution reverse osmosis composite membrane prepared by the invention has excellent retention rate and antibacterial property, and meanwhile, the retention rate is kept to be 97.4% or above while relatively high water flux is achieved. In addition, the sterilization capability on staphylococcus aureus and escherichia coli is very high. Meanwhile, the membrane has excellent anti-adhesion performance on bacteria, and microbial contamination on the surface of the membrane can be effectively prevented.

Owner:TIANJIN POLYTECHNIC UNIV

3 results about "Tannic acid" patented technology

Efficient keyboard cleaning solution

Preparation of aramid fiber modifying solution

Biological pollution resistant reverse osmosis composite membrane and preparation method thereof

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