Synthesis of POSS-containing fluorosilicone block copolymers via RAFT polymerization for application as non-wetting coating materials

摘要: Abstract By using a polydimethylsiloxane (PDMS) macro-chain transfer agent with trithiocarbonate groups at both ends, fluorosilicone block copolymers containing polyhedral oligomeric silsesquioxane (POSS) were synthesized via reversible addition–fragmentation chain (RAFT) polymerization. Acryloisobutyl POSS (APOSS) and 2,2,3,4,4,4-hexafluorobutyl acrylate (HFBA) sequentially introduced into the copolymers. The obtained triblock PDMS-b-(PAPOSS)2 exhibited low polydispersity index (PDI) of less than 1.42 in first 6 h polymerization, but PDI value became broader later because steric hindrance macromer. POSS-containing pentablock about 2.0, which prepared by further RAFT polymerization HFBA, showed clear microphase separation. average roughness values copolymer films enhanced introducing POSS, certain content led to significant decrease receding contact angle. Measurements water angles ice shear strengths demonstrated that non-wetting properties improved incorporation fluorine blocks. combine advantages PDMS fluoropolymers, can be potentially applied as coating materials for anti-icing or anti-frosting.