Prepare Of Nano SiO₂ Collide Modified Fuloro-carbon Emulsion And Study Of Water-borne Green Environmental Protection Coatings

Fluorocarbon coatings has been preferred for it highly resistance to weather, highly stain resistance because of it's has a strongest bond, lower surface energy, flexibility and etc. But with the raising price of the petrol chemical materials, the pollution to the environment become more seriously. Reduce the waste of the resource which not regenesis, lessen the hazard to the people's resident environment, To empolder environment protection coatings and highly performance coatings with hard work is become very important mission. Although solvent-based fluorocarbon coatings has some good performance, but at the same time it also have some limitation, such as flooding, floating, it will not easely curing at the room temperature, at the curing process it will emit some volatile organic compounds that may pollute the environment and so on, that limited it application to the coatings industry.Water-borne coatings is an environment-friendly coatings with water served as solvent or dispersing medium. This kind of coatings has the virtue of little pollution and construction security. With the development of polymerization technology, the performance of water-borne coatings is close to or equal to the performance of traditional coatings using organic solvent as dispersing medium. So more and more attention are putting to water-borne coatings. Acrylic acid ester containing fluoro monomer is one kind of monomer which had been widely used, use this monomer and other acrylic acid and it's ester to prepare copolymer will have a character as solvent fluorocarbon coatings, it was erected as the most important developing direction. This article prepared three kind of emulsion which use for the building coatings. This article also discussed the effect of feeding method of monomers, reaction temperature, initiator dosage, amount of nano-scale SiO₂ colloid, pH value, and polymerization process on the emulsion polymerization. The emulsion was characterized.Nanometer-materials attracted more and more scholars attention because of it's particular nanometer effects. Adding the nanometer-materials into coatings can obtain excellent performances. The water-borne coatings are the mainstream of the modern coatings, which have the fewer organic solvents, no pollute and innocuity. Therefore, how to disperse and rectify the nanometer-materials well, exert its good performance is also a challenge to the scholar who study on the subject of coatings.All of the work contain five part:Part one: Study evolve in domestics and overseasThe general introduction were given about the progress of water-borne fluorocarbon coatings, the concept of Core-Shell emulsion, preparation, mechanism, property, application, the progress of water-borne fluorocarbon emulsion, the preparation of water-borne fluorocarbon, the methods of modify, property and application, at lastPart two: Study of the fluorocarbon copolymer emulsion,Prepared fluorocarbon copolymer emulsion with Veova-10 and , study the effect of the reaction temperature, time of the reaction, emulsifier dosage, the ratio of different emulsifier, initiator dosage, amount of the materials, character it structure by FT-IR, XPS, studied the law of the at the process of the coatings film forming.Part three: Synthesis and Study of the water-borne fluorocarbon micro emulsionUse n-Pentyl alcohol as assist emulsifier, prepared copolymer emulsion with Veova-10, 2,2,3,4,4,4-Hexafluorobutyl acrylate, acrylic acid etc, studied the impact of the amount of Veova-10 to the contact angle, the impact of the amount of Veova-10 to the stability of polymerization, the impact of theCharacter it structure by FT-IR, GPC, KrussK12 surface energy analytical apparatus, studied the forming mechanism of the micro emulsion.Part four: Synthesis and Study of nano scale SiO₂ collide modified core-shell structure water-borne fluorocarbon emulsionUse nano scale SiO₂ collide as core, Veova-10 and 2,2,3,4,4,4-Hexafluorobutyl acrylate, acrylic acid and it's ester as shell, prepared core-shell structure fluorocarbon emulsion by core-shell technology, studied the amount of the nano scale SiO₂ collide, the influence of the adding style to the stability of polymerization, he dosage of the acrylic acid ester containing fluoro monomer, the effect of the emulsifier to the stability of polymerization, character it structure by FT-IR, the structure of the emulsion was observed with transmission electron microscopy(TEM) by the JEM-100SX. Part five: Preparation of the water-borne green environment protection coatingsUse nano scale SiO₂ collide modified Core-shell structure water-borne fluorocarbon emulsion as film forming material, prepared building coatings with paint, agent, DW etc, and then character all of the property, after the center of coatings quality supervisory and proof-test of Gansu province , all of the property content to the coatings standard of China, some of the property higher than the coatings standard of China, there is no VOC had been found.Prepare coatings use the methods provide from this article, use water as dispersing medium, at the process of film forming it will not give off hazard gas which harm to environment and human body, it's character content to the standard of green environment protect coatings, at the same time, it protect the body health of the user and the builder, released the waste of the organic solvent. Saved the energy resource.Use nano scale SiO₂ collide as core, prepared Core-Shell structure water-borne fluorocarbon with acrylic acid ester containing fluoro monomer, Veova-10, acrylic acid and it's ester as monomer, it's character content to the standard of CEPC, at now ,there is no the same article published in domestics and overseas.