表面接枝聚甲基丙烯酸二甲氨乙酯的pH响应型纤维素纸基材料  

p H-Responsive Cellulose Papers Prepared via ARGET ATRP Grafting of Poly(2-(dimethylamino) ethyl methacrylate)

作　　者：庄志良[1] 吴伟兵[1] 祝黎[1] 朱文远[1] 戴红旗[1] 

机构地区：[1]南京林业大学江苏省制浆造纸科学与技术重点实验室南京210037

出　　处：《高分子学报》2015年第10期1151-1157,共7页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号31470599,31200453,31200454);江苏高校优势学科建设工程资助项目

摘　　要：使用电子转移再生引发剂原子转移自由基聚合（ARGET ATRP）在滤纸表面接枝聚甲基丙烯酸二甲胺乙酯（PDMAEMA）,成功制备了具有p H响应性能的新型纤维素纸基材料.分别在苯甲醚和甲醇中进行该接枝聚合反应,发现在甲醇中接枝效率更高.通过游离引发剂生成的均聚物研究了滤纸表面聚合物侧链的分子量及分子量分布.均聚物的GPC曲线表明聚合物分子量随反应时间增加而增加,分子量分布为1.4~1.6.通过FTIR、SEM及接枝率的测量对改性滤纸进行表征,结果表明PDMAEMA在滤纸表面的接枝聚合具有可控性,通过控制反应时间可控制聚合物在滤纸表面的接枝量.在不同p H条件下对改性滤纸进行静态水接触角的测量,发现其疏水性随p H升高而增大,体现出该纸基材料的p H响应特性.Novel pH-responsive cellulose papers have been prepared via grafting poly （2-（dimethylamino） ethyl methacrylate） （PEMAEMA） from the conventional filter papers by ARGET （activators regenerated by electron transfer） ATRP （atom transfer radical polymerization）. The grafting polymerization was conducted in anisole and methanol respectively, and a relatively higher grafting efficiency was achieved in methanol. A sacrificial initiator was used when performing the reaction. The free polymer, formed from the sacrificial initiator in parallel to the grafting on the papers, was characterized by GPC, showing that the length of the polymer chains increased with increasing reaction time,and the molecular weight distribution index was between 1.4 1.6. The grafted filter papers were evaluated with FTIR, SEM and graft ratio, suggesting that ARGET ATRP provided a good control for the grafting of PDMAEMA, and the amount of polymer on the surfaces could be tailored by polymerization time. Water contact angle measurements implied that the papers presented obvious pH-responsive properties after the grafting. The wettability of the PDMAEMA-grafted papers varied with changes in pH,and the hydrophobic ability was enhanced when the pH was improved.

关 键 词：聚甲基丙烯酸二甲氨乙酯 ARGET ATRP p H响应 纤维素纸基材料 

分 类 号：TQ317[化学工程—高聚物工业]