Surface Modification of Nanoporous 1,2-Polybutadiene by Atom Transfer Radical Polymerization or Click Chemistry
Surface Modification of Nanoporous 1,2-Polybutadiene by Atom Transfer Radical Polymerization or Click Chemistry
复制标题
DOI：
10.1021/la9025443
复制
发表时间：
2010-02-02
期刊：
影响因子：
3.9
通讯作者：
Ndoni, Sokol
中科院分区：
文献类型：
--
作者：
Guo, Fengxiao;Jankova, Katja;Ndoni, Sokol
采用表面引发原子转移自由基聚合（ATRP）和点击化学方法，制备了具有旋回形态的基于油孔1,2-聚丁二烯（PB）的功能纳米多孔聚合物。通过两种不同的方法(1)将PB的双键三步化学转化为溴异丁酸酯，(2)用溴异丁酸基团对PB进行光化学功能化，制备了ATRP单体引发剂。叠氮化物官能团附着在孔壁上，然后与烷基化MPEG发生咔嗒反应。通过亲水性聚丙烯酸酯的atrp接枝和MPEG的点击，原本疏水的样品转变为亲水的纳米多孔材料。通过红外光谱、接触角测量和自发吸水性测量证实了改性的成功，并通过小角x射线散射和透射电子显微镜研究了改性的形貌。
Surface-initiated atom transfer radical polymerization (ATRP) and click chemistry were used to obtain functional nanoporous polymers based oil nanoporous 1,2-polybutadiene (PB) with gyroid morphology. The ATRP monolith initiator was prepared by immobilizing bromoester initiators onto the pore walls through two different methodologies: (1) three-step chemical conversion of double bonds of PB into bromoisobutyrate, and (2) photochemical functionalization of PB with bromoisobutyrate groups. Azide functional groups were attached onto the pore walls before click reaction with alkynated MPEG. Following ATRP-grafting of hydrophilic polyacrylates and click of MPEG, the originally hydrophobic samples transformed into hydrophilic nanoporous materials. The successful modification was confirmed by infrared spectroscopy, contact angle measurements and measurements of spontaneous water uptake, while the morphology was investigated by small-angle X-ray scattering and transmission electron microscopy.