Zhang Qi, Zhu Shiping
Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4L7.
ACS Macro Lett. 2014 Aug 19;3(8):743-746. doi: 10.1021/mz500377x. Epub 2014 Jul 16.
We report herein a novel approach for preparing CO- and O-responsive polymer nanoaggregates. The polymer, synthesized via atom transfer radical polymerization (ATRP), has one hydrophilic poly(ethylene glycol) (PEG) block, and the other hydrophobic block composed of 88 randomly distributed units of CO-responsive ,-diethylaminoethyl methacrylate (DEA) and 43 units of O-responsive 2,2,2-trifluoroethyl methacrylate (FMA). The amphiphilic copolymer self-assembled into vesicular nanoaggregates in water. With O bubbling, the vesicles expanded eight times in volume. With CO bubbling, the vesicular morphology collapsed and transformed into a small spherical micelle. The dual gas-responsivity significantly expanded the scope in designing stimuli-responsive materials and processes.
我们在此报告一种制备对一氧化碳和氧气响应的聚合物纳米聚集体的新方法。该聚合物通过原子转移自由基聚合（ATRP）合成，有一个亲水性聚乙二醇（PEG）嵌段，另一个疏水性嵌段由88个随机分布的对一氧化碳响应的甲基丙烯酸二乙氨基乙酯（DEA）单元和43个对氧气响应的甲基丙烯酸2,2,2-三氟乙酯（FMA）单元组成。两亲性共聚物在水中自组装成囊泡状纳米聚集体。鼓入氧气时，囊泡体积膨胀八倍。鼓入一氧化碳时，囊泡形态塌陷并转变为小的球形胶束。这种双重气体响应性显著扩展了刺激响应材料和过程的设计范围。
