School of Chemistry and Biosciences, University of Bradford, Bradford, BD7 1DP, UK.
Macromol Rapid Commun. 2018 Jul;39(14):e1800090. doi: 10.1002/marc.201800090. Epub 2018 May 2.
Thermal desolvation of poly(N-isopropylacrylamide) (PNIPAM) in the presence of a low concentration of gold nanoparticles incorporates the nanoparticles resulting in suspended aggregates. By covalently incorporating <1% acenaphthylene into the polymerization feed this copolymer is enabled to be used as a model to study the segmental mobility of the PNIPAM backbone in response to gold nanoparticles both below and above the desolvation temperature, showing that there is a physical conformational rearrangement of the soluble polymer at ultralow nanoparticle loadings, indicating low affinity interactions with the nanoparticles. Thermal desolvation is capable of extracting >99.9% of the nanoparticles from their solutions and hence demonstrates that poly(N-isopropylacrylamide) can act as an excellent scrubbing system to remove metallic nanomaterial pollutants from solution.
在低浓度金纳米粒子存在的情况下，通过对聚（N-异丙基丙烯酰胺）（PNIPAM）进行热去溶剂化处理，将纳米粒子纳入其中，形成悬浮聚集体。通过将<1%的苊烯共价结合到聚合进料中，使该共聚物能够用作模型来研究 PNIPAM 主链在低于和高于去溶剂化温度时对金纳米粒子的分子段移动性，表明在超低纳米粒子负载下，可溶性聚合物发生了物理构象重排，表明与纳米粒子的亲和力低。热去溶剂化能够将>99.9%的纳米粒子从其溶液中提取出来，这表明聚（N-异丙基丙烯酰胺）可以作为一种极好的洗涤系统，从溶液中去除金属纳米材料污染物。
