Study On Preparation Of POSS-based Fluorinated Acrylate Copolymer And Wettability Of Its Film

Trace water in gas or oil of airplanes and automobiles plays a crucial impact onthe efficiency of engines, even safety problem. Coalescence separation can effectivelyremove trace water in gas and oil, which is of great signifiance to ensure the safe workof airplanes and automobiles. In this article, series of hybrid fluorinated acrylatecopolymer with POSS groups will be prepared using free radical polymerizationmethod. On the filter mesh hydrophobic film was prepared using POSS groups ofcopolymer which can aggregate and self-assemble to construct composite structureand fluorine-carbon chain segment which can provide low surface energy. Theresearch can provide some theoretical guidance for the development of coalescenceseparation surface. This article mainly from the following aspects:First of all, three kinds of POSS based hybrid copolymers(P(MMA-BA-MAPOSS)、 P(MMA-BA-HEMA-FMA-MAPOSS) andP(MMA-BA-OVPOSS)were prepared using free radical polymerization method withAIBN as initiator. The chemical structure of copolymer was analyzed by FTIR, NMR,GPC, DSC and TGA, respectively. It was found that POSS was successfullyintroduced into the copolymers. The copolymer possessed fine thermal stability withthe molecular weight about20000and the molecular weight distribution between1.5to1.8.In addition, the film surface wettability of hybrid fluorinated acrylate copolymerwith MAPOSS groups was studied. The copolymer was prepared with FMA as themonomer containing fluorine, the mass fraction of MAPOSS was20%, addingMAPOSS at the late reaction stage. The hydrophobic film was prepared with solventwhich was prepared by xylene and F113(v/v=1:1), concentration of the film solutionwas0.5%and the film formation temperature was100℃. The performance of surfacefilm was excellent. The water contact angle on the filter mesh was144°. Thehardness of film was2H. The adhesion of film was the1level. The analysis by XPSrevealed that the fluorine-carbon chain segment was migrated and enriched from thesurface of the film. The analysis of surface morphology by SEM and AFM revealedthat the fiber of the filter mesh was covered well by film and composite roughstructure on the filter mesh was prepared obviously.