Klinger Daniel, Wang Cynthia X, Connal Luke A, Audus Debra J, Jang Se Gyu, Kraemer Stephan, Killops Kato L, Fredrickson Glenn H, Kramer Edward J, Hawker Craig J
Materials Research Laboratory, University of California, Santa Barbara, CA 93106 (USA).
Angew Chem Int Ed Engl. 2014 Jul 1;53(27):7018-22. doi: 10.1002/anie.201400183. Epub 2014 Apr 2.
We herein report a new facile strategy to ellipsoidal block copolymer nanoparticles that exhibit a pH-triggered anistropic swelling profile. In a first step, elongated particles with an axially stacked lamellae structure are selectively prepared by utilizing functional surfactants to control the phase separation of symmetric polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP) in dispersed droplets. In a second step, the dynamic shape change is realized by cross-linking the P2VP domains, thereby connecting glassy PS discs with pH-sensitive hydrogel actuators.
我们在此报告一种制备椭圆形嵌段共聚物纳米粒子的新的简便策略，该纳米粒子呈现出pH触发的各向异性溶胀曲线。第一步，通过利用功能性表面活性剂控制对称聚苯乙烯-b-聚（2-乙烯基吡啶）（PS-b-P2VP）在分散液滴中的相分离，选择性地制备具有轴向堆叠层状结构的细长颗粒。第二步，通过交联P2VP域实现动态形状变化，从而将玻璃态PS圆盘与pH敏感水凝胶致动器连接起来。
