退火对PMTFPS-b-PS电纺膜表面性质的影响

Effect of Annealing on Surface Properties of PMTFPS-b-PS Electro-spinning Film

通过氟硅单体1,3,5-三甲基-1,3,5-三(3,3,3-三氟丙基)环三硅氧烷(简称F3)的阴离子开环聚合(ROP)、苯乙烯(St)的原子转移自由基聚合(ATRP),合成了含氟硅嵌段共聚物PMTFPS-b-PS,并将其以四氢呋喃(THF)和N,N-二甲基甲酰胺(DMF)为溶剂进行静电纺丝。采用接触角测量仪(CAM)、扫描电镜(SEM)、X射线光电子能谱(XPS)研究PMTFPSb-PS电纺膜退火前后的疏水性、微观形貌以及表面化学组成。结果表明:电纺纤维的水接触角可达152.6°,即达到超疏水的效果,经过120℃退火处理后电纺膜的表面光滑,接触角有所减小,但其水接触角仍远高于共聚物溶剂膜的接触角。

This study synthesizes fluorosilicone contained segmented copolymer PMTFPS-b-PS through anion ring opening polymerization（ROP）of fluorosilicone monomer 1,3,5-trimethyl-1,3,5-three（3,3,3-trifluoride propyl）trisiloxanes（F3）and atom transfer radical polymerization（ATRP）of styrene（St）,conducts electro-spinning with tetrahydrofuran（THF）and N,N-dimethylformamide（DMF）as solvents and studies the hydrophobicity,microstructure and surface chemical constitution of PMTFPS-b-PS electro-spinning film before and after annealing through contact angle meter（CAM）,scanning electron microscope（SEM）and X-ray photoelectron spec（XPS）.The result shows that water contact angle of electro-spinning fiber can reach 152.6°,i.e.achieve super-hydrophobic effect;electro-spinning film subject to annealing at 120℃has a smooth surface and its contact angle decreases,but its water contact angle is still higher than the contact angle of copolymer solvent membrane.