At present, the mainstream product of water repellent
and oil repellent in the textile field is still a fluorine-containing acrylate emulsion. The fluorine-containing water repellent is mainly composed of C8 water and oil repellent
, which is mainly because the perfluorooctyl side chain is favorable for crystallization, and the water and oil repellent performance is better. The results of the study indicate that the factor determining the surface properties is not the static contact angle, but the dynamic contact angle, especially the receding contact angle. The crystallinity of the perfluorooctyl side chain makes the receding contact angle significantly higher than that of the short fluorochain monomer water repellent having a side chain carbon number of less than or equal to 7. However, since the perfluorooctyl side chain is derived from perfluorooctanoic acid (PFOA), PFOA has been proven to be bioaccumulative and difficult to degrade. Currently, the European Union and the US Environmental Protection Agency (EPA) have enacted laws to disable it. . Large foreign companies such as DuPont, 3M, Daikin of Japan, Asahi Glass of Japan, and Angga have stopped selling waterproofing agents containing perfluorooctyl side chain monomers. At present, attempts have been made internationally to use monomers having relatively short perfluorocarbon chains, such as C6 perfluorohexylethyl methacrylate (C6FMA) and C4 perfluorobutylethyl methacrylate (C4FMA). Due to the poor waterproof performance of C4FMA, C6FMA is mainly used at present. However, C6FMA is expensive, and if the performance and effect of perfluorooctyl group are to be achieved, it is necessary to increase the dosage, which will cause an increase in cost, which is not conducive to the promotion of C6 waterproofing agent.