Interpenetrating thermophobic and thermophilic dual responsive networks
Interpenetrating thermophobic and thermophilic dual responsive networks
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DOI：
10.1002/pola.29292
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发表时间：
2018-11
期刊：
影响因子：
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通讯作者：
F. Käfer;Yunfeng Hu;Yan Jie Wang;Z. Wu;S. Agarwal
中科院分区：
文献类型：
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作者：
F. Käfer;Yunfeng Hu;Yan Jie Wang;Z. Wu;S. Agarwal
采用紫外光引发自由基聚合法，分两步制备了聚N-丙烯酰甘氨酰胺(PNAGA)/聚N-异丙基丙烯酰胺(PNIPAAm)互穿网络(IPN)水凝胶。由于PNIPAAm(憎热)和PNAGA(嗜热)网络的结合，IPN水凝胶表现出双重的热响应行为。随着疏热PNIPAAm网络含量的增加，PNAGA的相变温度由宽的亲热体积转变为亲热-憎热的双相转变。由于IPN凝胶的双重热响应性，其力学性能依赖于温度，通过在15℃和50℃的水中进行拉伸测试证明了这一点。此外，通过浊度测量、扫描电子显微镜和平衡溶胀比的测定对IPN水凝胶进行了表征。2018年威利期刊公司J.Polym。科学，A部分：多晶硅。化学，2019，57,539-544
Poly(N‐acryloyl glycinamide) (PNAGA)/poly(N‐isopropyl acrylamide) (PNIPAAm) interpenetrating network (IPN) hydrogels were made by UV‐light initiated radical polymerization in two‐steps. The IPN hydrogels showed a double thermoresponsive behavior due to the combination of PNIPAAm (thermophobic) and PNAGA (thermophilic) networks. Increasing the content of the thermophobic PNIPAAm network leads to a change from a broad thermophilic volume phase transition temperature of PNAGA to a thermophilic–thermophobic‐type dual transition for the prepared IPN. Due to the double thermoresponsive character of the IPN gels, the mechanical properties are dependent upon temperature as demonstrated by performing tensile tests in water at 15 and 50 °C. Furthermore, the IPN hydrogels were characterized using turbidity measurements, SEM, and the determination of the equilibrium swelling ratio. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem.2019,57, 539–544