摘要
采用大分子单体技术合成了以聚甲基丙烯酸甲酯为主链 ,聚氧乙烯链为侧链 ,末端为白蛋白诱导吸附基团的十八烷基功能聚合物聚甲基丙烯酸甲酯接枝十八烷基聚氧乙烯 .采用变角 X光电子能谱和表面接触角研究了该功能聚合物在空气和水界面的性质 .结果表明 ,在聚合物 -空气界面 ,十八烷基聚氧乙烯( SPEO)的表面含量随表面层厚度的降低而升高 ,并在表面发生高度富集 .在聚合物 -水界面 ,聚合物表面重组行为较弱 ,形成了高 SPEO含量的疏水表面 ,该 SPEO尾形结构表面预期可发挥聚氧乙烯和十八烷基的协同作用 ,形成白蛋白原位复合的生物医用功能材料 .
Poly(methyl methacrylate)-graft-[ω-stearyl-poly(ethylene oxide)] (PMMA-g-SPEO) and poly(methyl methacrylate)-graft-[ω-ethyl-poly(ethylene oxide)](PMMA-g-EPEO) were synthesized by free radical copolymerization of methyl methacrylate monomer with α-methacryloyl-ω-stearyl poly(ethylene oxide) macromonomer or α-methacryloyl-ω-ethyl poly(ethylene oxide) macromonomer. X-ray photoelectron spectroscopy(XPS) analysis indicates the substantial surface enrichment of the stearyl poly(ethylene oxide)(SPEO). In an aqueous environment, the surface rearrangement is limited, as proved by dynamic contact angle tests. The comb-like copolymer presents a special hydrophobic surface with a high SPEO surface density, which may be due to the 'tail like' SPEO architecture on the copolymer/water interface.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第11期2196-2201,共6页
Chemical Journal of Chinese Universities
基金
国家自然科学基金 (批准号 :2 980 40 0 9)资助
