Coating composition with antimicrobial activity and anti-salt water activity and preparation method thereof
A composition and coating technology, applied in antifouling/underwater coatings, biocide-containing paints, coatings, etc., can solve the problems of expensive, unsuitable for long-term storage and treatment of large surfaces, ineffective, etc., and achieve low production costs Effect
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Embodiment 1
[0061] Embodiment 1 is based on the preparation of the aqueous solution of phosphoric acid citric acid (AFC)
[0062] According to the synthesis method reported in the known literature, AFC is obtained in the form of high concentration aqueous solution (1-1.5M): W.P.Tew, C.Mahle, J.Benavides, J.E.Howard, A.L.Lehninger, Synthesis and Characterization of PhosphocitricAcid, a Potent Inhibitor of Hydroxylapatite Crystal Growth, Biochemistry 1980, 19, 1983-1988. The method mainly includes the following steps:
[0063] - In the presence of pyridine, an equimolar ratio of o-phenylene chlorophosphate and a concentration of 10 - 3 M's triethyl citrate reaction, and use toluene as solvent to form the o-phenylene phosphate of protected triethyl citrate;
[0064] - by H 2 / PtO 2 Removal of the phenylene protecting group by catalytic reduction of the system, carried out at the ambient pressure reported in the publication;
[0065] - in NaOH / CaCl 2 In the presence, the ethyl protecti...
Embodiment 2
[0069] The preparation of embodiment 2 ZnO microrods
[0070] ZnO microrods were prepared by a simple and economical favorable hydrothermal technique. The method usually includes the following steps:
[0071] - Prepare a water-based growth solution consisting of zinc nitrate hexahydrate and hexamethylenetetramine in equimolar proportions in a Pyrex beaker, which is dissolved in deionized water by magnetic stirring at 500 rpm at room temperature for 30 minutes until a homogeneous growth solution is obtained. phase solution;
[0072] - transfer the beaker containing the growth solution to a hot oven at a temperature of approximately 300°C and keep the beaker in the hot oven for at least 3 hours;
[0073] - replace the growth solution with deionized water a.r. and sonicate in the bath to dislodge the white deposit consisting of ZnO microrods stuck to the bottom of the beaker (which acts as a substrate during growth);
[0074] - Filtration of the suspension obtained after son...
Embodiment 3
[0077] The preparation of embodiment 3ZnO nanorods
[0078] ZnO nanorods were produced by employing a thermal decomposition process. Zinc acetate dihydrate, a synthetic precursor, was first placed between two sheets of aluminum foil, which was then placed in a sealed steel container. The steel container thus prepared was then placed in a preheated muffle furnace and kept at 300°C for 12 hours. Thereby, ZnO nanorods are obtained in aggregated form in the porous foil.
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