通过表面引发的原子转移自由基聚合制备智能双响应纤维素表面
Intelligent dual-responsive cellulose surfaces via surface-initiated ATRP.
作者信息
Lindqvist Josefina, Nyström Daniel, Ostmark Emma, Antoni Per, Carlmark Anna, Johansson Mats, Hult Anders, Malmström Eva
机构信息
Department of Fibre and Polymer Technology, Royal Institute of Technology, KTH School of Chemical Science and Engineering, Stockholm, Sweden.
出版信息
Biomacromolecules. 2008 Aug;9(8):2139-45. doi: 10.1021/bm800193n. Epub 2008 Jul 18.
Novel thermo-responsive cellulose (filter paper) surfaces of N-isopropylacrylamide (NIPAAm) and pH-responsive cellulose surfaces of 4-vinylpyridine (4VP) have been achieved via surface-initiated ATRP. Dual-responsive (pH and temperature) cellulose surfaces were also obtained through the synthesis of block-copolymer brushes of PNIPAAm and P4VP. With changes in pH and temperature, these "intelligent" surfaces showed a reversible response to both individual triggers, as indicated by the changes in wettability from highly hydrophilic to highly hydrophobic observed by water contact angle measurements. Adjusting the composition of the grafted block-copolymer brushes allowed for further tuning of the wettability of these "intelligent" cellulose surfaces.
通过表面引发的原子转移自由基聚合反应（ATRP），制备出了具有新型热响应性的N-异丙基丙烯酰胺（NIPAAm）纤维素（滤纸）表面以及具有pH响应性的4-乙烯基吡啶（4VP）纤维素表面。通过合成聚N-异丙基丙烯酰胺（PNIPAAm）和聚4-乙烯基吡啶（P4VP）的嵌段共聚物刷，还获得了双响应（pH和温度）纤维素表面。随着pH值和温度的变化，这些“智能”表面对两种单独的触发因素都表现出可逆响应，水接触角测量结果表明，其润湿性从高亲水性变为高疏水性。调整接枝嵌段共聚物刷的组成，可以进一步调节这些“智能”纤维素表面的润湿性。
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