通过“点击化学”反应合成了含1,2,3-三氮唑官能团的单体(VBTM),再采用可逆加成-断裂链转移(RAFT)活性自由基聚合法,制备了含有1,2,3-三氮唑官能团的聚苯乙烯(PS-b-PVBTM)两嵌段共聚物.将PS-b-PVBTM旋涂于金片表面成膜,形成以聚苯乙烯链段为核、PVBTM链段为冠的胶束结构;此薄膜于90℃ 退火24 h后,球状结构转变为表面富集PS的环状结构.采用表面等离子体谐振仪(SPR)原位检测蛋白质在PS-b-PVBTM上的吸附动力学.结果表明,当缓冲液为中性时,聚合物薄膜对牛血清蛋白(BSA)和肌红蛋白(Myoglobin)没有吸附,而对等电点为11的溶菌酶(Lysozyme)则有吸附;经退火处理后的聚合物薄膜对Lysozyme的吸附量减少了0.26 ng/mm2;当缓冲液为酸性时,该聚合物薄膜对BSA产生吸附,且吸附量随缓冲液pH值的降低而增加.PS-b-PVBTM对以上3种蛋白质的吸附为静电吸附.
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