智能均聚物微凝胶：单体结构对颗粒性质的影响。

Wedel Bastian, Hertle Yvonne, Wrede Oliver, Bookhold Johannes, Hellweg Thomas

Physical and Biophysical Chemistry, Bielefeld University, 33615 Bielefeld, Germany.

Polymers (Basel). 2016 Apr 23;8(4):162. doi: 10.3390/polym8040162.

In this work, we compare the properties of smart homopolymer microgels based on -propylacrylamide (NNPAM), -isopropylacrylamide (NIPAM) and -isopropylmethacrylamide (NIPMAM) synthesized under identical conditions. The particles are studied with respect to size, morphology, and swelling behavior using scanning electron and scanning force microscopy. In addition, light scattering techniques and fluorescent probes are employed to follow the swelling/de-swelling of the particles. Significant differences are found and discussed. Poly(-propylacrylamide) (PNNPAM) microgels stand out due to their very sharp volume phase transition, whereas Poly(-isopropylmethacrylamide) (PNIPMAM) particles are found to exhibit a more homogeneous network structure compared to the other two systems.

在这项工作中，我们比较了在相同条件下合成的基于N-丙基丙烯酰胺（NNPAM）、N-异丙基丙烯酰胺（NIPAM）和N-异丙基甲基丙烯酰胺（NIPMAM）的智能均聚物微凝胶的性能。使用扫描电子显微镜和扫描力显微镜研究了颗粒的尺寸、形态和溶胀行为。此外，采用光散射技术和荧光探针来跟踪颗粒的溶胀/去溶胀过程。发现并讨论了显著差异。聚（N-丙基丙烯酰胺）（PNNPAM）微凝胶因其非常尖锐的体积相变而脱颖而出，而聚（N-异丙基甲基丙烯酰胺）（PNIPMAM）颗粒与其他两个体系相比，呈现出更均匀的网络结构。