Composite antibacterial agent and prepared antibacterial bacteriostasis multifunctional inorganic ecological coating
A compound antibacterial agent, multifunctional technology, applied in the direction of fungicides, biocide-containing paints, antifouling/underwater coatings, etc. and other problems, to achieve good film formation and polymer diffusion rate, inhibit the generation and escape of VOC, and improve mechanical properties.
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Embodiment 1
[0090] Preparation of chitosan-loaded Ag / Cu bimetallic nanoparticles: 3 g of chitosan was dispersed in 100 ml of water by sonication for 10 min, followed by addition of 0.01 M concentration of AgNO 3 20ml of aqueous solution, and the mixture was ultrasonically treated for 60 minutes to obtain a suspension; (2) Add 100ml of N,N-dimethylformamide to the resulting suspension, and react at 90°C for 6 hours under stirring, and then use deionized The Ag nanoparticle-chitosan hybrid recovered by washing with water; (3) The Ag nanoparticle-chitosan hybrid prepared in step (2) was mixed with 0.01M concentration of CuCl under ultrasonic treatment 2 20ml of the solution were mixed, stirred for 2 hours, then slowly added 4.4ml of 0.1M potassium borohydride aqueous solution, and the mixture was reacted at 100°C for 24 hours, then washed with water and dried to obtain a chitosan-loaded Ag / Cu bimetallic nanoparticles.
Embodiment 2
[0092] Protect the reaction vessel with nitrogen, then add the initial charge to the reaction vessel, wherein the initial charge contains 250 parts by weight of water and 0.0001 parts by weight of HEDTA-3NA; then use a water bath to heat the flask to 90 ° C, continuously A monomer feed and an aqueous feed were added, and the continuous feed was completed within 4 hours, wherein the monomer feed contained 110 parts by weight of methyl acrylate, 60 parts by weight of methyl methacrylate, 10 parts by weight of methacrylic acid Glycidyl ester, 6 parts by weight of γ-methacryloxypropyl trimethoxysilane, the aqueous feed contains 60 parts by weight of deionized water, 2.0 parts by weight of dodecyl diphenyl ether disulfonic acid Sodium surfactant, 0.3 parts by weight of sodium persulfate, and 0.2 parts by weight of sodium bicarbonate were added. After the addition, the latex was kept at 90° C. for 1 hour to complete the polymerization, and then filtered to obtain a latex polymer.
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Embodiment 3
[0096]In a 500 mL flask equipped with a mechanical stirrer, a thermometer and a condenser, 130 g of 2-hydroxyethyl methacrylate and 0.2 g of monomethyl ether hydroquinone were placed to bring the reactor to about 50 ° C, and then 59.16 g, phosphorus pentoxide is slowly added to the reactor, the temperature is kept below 50°C, the reaction is carried out under nitrogen atmosphere for 3 hours, cooled to room temperature, filtered, the pH value of the system is adjusted to about 8.0 with sodium hydroxide solution, filtered, and then Adjust the pH value of the filtrate to 3-6, let it stand, filter out the precipitate, wash, and dry to obtain the surfactant represented by formula (I).
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