Preparation method and application of modified silicon dioxide for environment-friendly water and oil repellent coating

• Main Authors: JIN QIANHONG, WANG GUOBAO, QIU XIANZHOU, QI DONGMING, LI JIAWEI
• Format: Patent
• Language: Chinese; English
• Published: 05.08.2022
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; FILLING PASTES; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; IMPREGNATING OR COATING OF PAPER; INKS; LAUNDERING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS; USE OF MATERIALS THEREFOR; WOODSTAINS

The invention relates to the field of water-repellent and oil-repellent coatings, and discloses a preparation method and application of modified silicon dioxide for an environment-friendly water-repellent and oil-repellent coating. The preparation method of the modified silicon dioxide comprises the following steps: (1) uniformly mixing hexadecyl trimethyl ammonium bromide, urea and water to obtain a water phase; uniformly mixing tetraethoxysilane and an oil phase solvent to obtain an oil phase; mixing the water phase and the oil phase, carrying out hydrolytic condensation, and separating out a product, so as to obtain porous nano silicon dioxide; and (2) grafting a silane coupling agent to the surface of the porous nano silicon dioxide obtained in the step (1) to obtain the modified silicon dioxide for the environment-friendly water and oil repellent coating. The nano silicon dioxide is prepared by adopting a special method, and the surfaces of nano silicon dioxide particles can have porous structures, so th