4results about How to "Improve self-healing efficiency" patented technology

The application provides a self-repairing silicone resin and a preparation method thereof, OCA optical glue containing the self-repairing silicone resin and application of the self-repairing silicone resin. The self-repairing silicone resin contains a disulfide bond and a mercapto group in a molecular structure. The content of the disulfide bond in the self-repairing silicone resin is greater than 0.6 mmol / g. The self-repairing silicone resin is used for preparing OCA optical glue. While ensuring high light transmittance, low yellowing and good mechanical properties of the OCA optical glue, the self-repairing silicone resin can improve the initial adhesion of the OCA optical glue, and can also endow the OCA optical glue with a self-repairing function and improve the repair efficiency.

This invention discloses a two-component self-healing polyurethane crack sealant based on dynamic disulfide bonds and its preparation method. The sealant comprises, by weight, component A containing 40-50 parts of polyol and 10-20 parts of diisocyanate, and component B containing 3-9 parts of a chain extender containing dynamic disulfide bonds, 0.5-3.5 parts of an auxiliary chain extender, 20-25 parts of filler, and 0.05-0.2 parts of catalyst; wherein the molecular weight of the polyol is 650-2000; the mass ratio of component A to component B is (1.5-2.5):1; and the catalyst is an organotin carboxylate catalyst. The sealant provided by this invention provides damage / repair functionality through the dynamic disulfide bond chain extender, while the auxiliary chain extender constructs stable hard segment crystals or hydrogen bond networks, providing initial strength and dimensional stability. These two components synergistically improve the self-healing properties and toughness of the prepared polyurethane crack sealant.

This disclosure provides a silicon-carbon anode sheet, its preparation method, and a soft-pack lithium battery. The preparation method of the silicon-carbon anode sheet involves: dissolving water-soluble conductive polyaniline in an organic solvent, mixing it with CMC adhesive, and then mixing it with silicon-carbon slurry and a multifunctional organophosphonic acid crosslinking agent (mixing temperature: 15℃-25℃) to obtain an anode slurry; coating the anode slurry onto a negative current collector to obtain a silicon-carbon anode sheet semi-finished product; and sequentially subjecting the silicon-carbon anode sheet semi-finished product to pre-baking (90℃-120℃) and vacuum drying (70℃-90℃, time: 2h-5h) to obtain the silicon-carbon anode sheet. This method, by adding multifunctional organophosphonic acid crosslinking agents and water-soluble conductive polyaniline, facilitates the formation of a three-dimensional conductive suppression network with high conductivity, uniform and continuous conductivity, strong toughness and strong self-healing ability. This enhances the constraint on the negative electrode slurry, reduces the volume expansion rate to <15%, inhibits silicon-carbon cracking, and improves the self-healing ability of the three-dimensional conductive suppression network, thus broadening the application of high-capacity silicon-carbon negative electrode sheets in soft-pack lithium batteries.

This invention relates to the field of coating technology and discloses a polyurea waterproof coating and its preparation method, comprising the following weight components: 40-50 parts by weight of polyurea resin, 3-5 parts by weight of fluorine-modified bamboo powder, 0.2-0.4 parts by weight of BYK-071 defoamer, and 0.1-0.3 parts by weight of BYK-345 leveling agent; the preparation method of the fluorine-modified bamboo powder is as follows: Step 1: reacting bamboo powder with KH-550 to obtain coupling agent-modified bamboo powder; Step 2: reacting the coupling agent-modified bamboo powder with perfluorooctanoyl chloride under the action of triethylamine catalyst to obtain fluorine-modified bamboo powder. The polyurea waterproof coating prepared by this invention has good waterproof and self-healing effects.