72results about How to "Good anti-swelling performance" patented technology

The invention discloses the preparation and application of an anion exchange membrane using BMP for internal cross-linking. The preparation method is as follows: (1) Dissolving chloromethylated polysulfone in NMP at room temperature, fully stirring to completely dissolve the chloromethylated polysulfone, and obtaining a colorless and transparent chloromethylated polysulfone solution; ( 2) At room temperature, add a certain amount of 4,4'-trimethylenebis(1-methylpiperidine) to the chloromethylated polysulfone solution and stir for 20-60min to make it react with chloromethylated polysulfone Cross-linking and quaternization reactions to obtain the casting solution; (3) Degas the casting solution completely, then pour it on a clean glass plate and scrape the film with a scraper, dry it in vacuum, and then fully soak it in deionized water to make the film Naturally fall off from the glass plate to obtain anion exchange membrane. The anion exchange membrane prepared by the present invention has good swelling resistance and alkali resistance, and the present invention provides the application of the anion exchange membrane in electrodialysis desalination, which has the advantages of high desalination rate, high current efficiency and low energy consumption advantage.

The invention discloses fluorosilicone gum with high anti-swelling property, and a preparation method thereof. Per 100 parts by mass of gum comprise the following components in parts by mass: 10 to 90 parts of a long-chain fluoroalkyl-containing siloxane tricyclic compound, 8 to 88 parts of a trifluoropropyl-containing siloxane cyclic compound, 0.5 to 10 parts of a vinyl-containing siloxane cyclic compound, 0 to 8 parts of a siloxane cyclic compound not containing fluorine and double bonds and 0.02 to 0.2 part of an end-capping reagent, wherein the long-chain fluoroalkyl-containing siloxane tricyclic compound can be shown as a formula (Si(CH3)(Rf)O)3, Rf can be shown as a formula -(CH2)mCnF2n+1, n is an integer of 3 to 8, and m is 2 or 3. The fluorosilicone gum with high anti-swelling property, provided by the invention, has high crosslinkable density, has excellent solvent resistance after sulfurization crosslinking, and reduces the cost.