聚氨酯-含氟丙烯酸酯复合乳液的制备及其表面性能  

Preparation and surface properties of polyurethane-fluorinated acrylate hybrid dispersions

作　　者：李刚辉[1] 李小瑞[1] 沈一丁[1] 

机构地区：[1]陕西科技大学化学与化工学院,陕西咸阳712081

出　　处：《化工学报》2006年第1期192-196,共5页CIESC Journal

基　　金：国家自然科学基金项目(50473049);陕西省自然科学基金项目(2003B02).~~

摘　　要：为了得到低表面自由能的聚氨酯-丙烯酸酯乳胶膜,以2,2,3,4,4,4-六氟丁醇甲基丙烯酸酯(FA)、苯乙烯(St)、丙烯酸丁酯(BA)为单体,在交联聚氨酯溶液(PU)中通过溶液聚合相转化法制得阳离子含氟聚氨酯-丙烯酸酯复合乳液(FPUA).通过FT-IR、TEM、粒径分析及接触角测试对聚合物结构、乳胶粒径及形态、乳胶膜表面性能进行了研究.研究表明,含氟丙烯酸酯的引入使聚氨酯-丙烯酸酯乳胶膜的表面自由能降低50%以上,常温固化的FPUA乳胶膜的表面自由能小于0·0172J·m-2;该复合乳液的粒子形态呈球形,粒径约为220nm.Cationic fluorinated polyurethane acrylate hybrid dispersions were prepared by the copolymerization of 2,2,3,4,4,4-hexafluorobutyl methacrylate, butyl acrylate and styrene in crosslinked polyurethane acetone solution via phase inversion polymerization in order to obtain polyurethane-acrylate films with low surface free energy. The structure, surface properties, particle size and morphology of FPUA water dispersions were investigated by FT IR, TEM, submicron particle size analyzer and contact angle measurements respectively. The results showed that the introduction of fluorinated monomer could decrease the surface free energy by more than 50%, and the FPUA films cured at ambient conditions had surface free energy （lower than 0. 0172 J·m^-2）. At the same time, the dispersion particle was spherical with particle diameter is about 220 nm.

关 键 词：含氟丙烯酸酯 阳离子聚氨酯 表面自由能 粒子形态 

分 类 号：TQ433[化学工程]