41 results about "Tetradecyltrimethylammonium bromide" patented technology

The invention relates to an aqueous coating composition of nano cellulose (e.g. microfibrillated cellulose), characterized in that has a dry matter concentration of 2%-12% of nano celluloseand comprises at least one cationic surfactant, which may be chosen among Hexadecyltrimethyl-ammonium bromide,Octadecyltrimethyl- ammonium bromide,Hexadecylpyridinium chloride andTetradecyltrimethyl- ammonium bromide, Dodecylpyridinium chloride. The invention also pertains to use of the composition as a coating layer and as an oxygen barrier layer. Further it relates to substrates, e.g. board, cardboard or paper coated with the composition. Moreover, the invention pertains to a process for preparing the coating composition.

A method of servicing a wellbore comprising placing downhole a composition comprising a surfactant package comprising a cationic surfactant and anionic surfactant, wherein the surfactant package when contacted with an aqueous solution forms a viscosified composition in the presence of less than about 30 wt. % of a hydrotrope.

The invention provides a method for preparing carbon micro-spheres by using coal as a raw material, and belongs to the technical field of coal made carbon materials with high additional values. The method comprises the following steps of: taking a product obtained through the reaction of the coal, sodium hydroxide and methanol as a carbon source, dissolving the reaction product carbon source intoaqueous solution of ethanol, then adding a dodecyl trimethyl ammonium bromide or tetradecyl trimethyl ammonium bromide or hexadecyl trimethyl ammonium bromide directing agent into the solution to obtain a mixture, blending the mixture uniformly and filling the mixture into a reaction kettle, heating the mixture to between 300 and 700 DEG C in a heating furnace, stopping heating after the mixture is reacted for 6 to 24 hours, naturally cooling the reaction product to room temperature, washing the reaction product by using ethanol and then deionized water, and finally drying the reaction product to obtain black powdery carbon micro-spheres. The carbon micro-sphere product obtained by the method has high purity, the purity can reach 95 percent, and the average grain diameter of the product is 5 to 10 microns. The method has the characteristics of low-cost and easily obtained raw materials, easy operation, simple process, good reproducibility and suitability for scale production.

The invention provides a surfactant composition applied to in vitro diagnostic reagents, which belongs to the technical field of surfactants, and the components include: sucrose-glucose-6-sodium carboxylate-fructose-6-sodium carboxylate-1-(N- lauryl formamide), sodium perfluorooctanoate, tetradecyltrimethylammonium bromide and Gemini surfactant 12‑2‑12, of which sucrose‑glucose‑6‑sodium carboxylate‑fructose‑6‑sodium carboxylate The content of ‑1‑(N‑dodecylformamide) is 5‑80mM, the content of sodium perfluorooctanoate is 10‑100mM, the content of tetradecyltrimethylammonium bromide is 10‑100mM, Gemini surfactant The content of 12‑2‑12 is 0.1‑2mM. The invention can optimize the reaction system of the in vitro diagnostic kit, improve performance indicators such as the repeatability, batch-to-batch difference, accuracy and stability of the kit, and help prolong the validity period of the in vitro diagnostic reagent.

The invention relates to a preparation method of a viscoelastic surfactant solution obtained by compounding anionic and cationic surfactants containing trimeric anionic surfactant components, wherein the structure of the main component anionic surfactant is as follows: wherein the cationic surfactant The active agent can be any one of dodecyltrimethylammonium bromide (DTAB), tetradecyltrimethylammonium bromide (TTAB) or cetyltrimethylammonium bromide (CTAB) . The longer the hydrophobic chain length of the cationic surfactant, the better the effect of the viscoelastic solution formed with the trimeric anionic surfactant. The preparation of the surfactant solution includes two main processes of synthesis and compounding of the trimeric surfactant. The compounded surfactant solution shows the characteristics of elasticity at low concentration, and the solution can show a gel-like shape, which can be applied to oil field fracturing fluid, drag reducer and daily cleaning agent formulation.

The invention discloses a method for synthesizing high-purity hexagonal columnar silicon dioxide nanoporous material, which comprises dissolving template agent tetradecyltrimethylammonium bromide in deionized water at 27°C, stirring until the solution is clarified, and then adding Ammonia solution with a mass fraction of 25-28%, after continuing to stir for 10 minutes, add tetraethyl orthosilicate dropwise, stir while adding, the molar ratio of tetraethyl orthosilicate and template agent is 1:0.152, the mixture is in React at 27°C for 1 hour, and control the pH value of the reaction mixture at 10.6-10.8; put the reacted solution into a hydrothermal reaction kettle, then place the hydrothermal reaction kettle in a blast oven to dry, filter and wash to obtain a solid powder , drying, putting the dried sample into a tube furnace to calcinate to remove the template agent, and obtain hexagonal columnar nanoporous silica materials, all of which are hexagonal columnar and uniform in size.