水与铁电共聚物：聚（偏二氟乙烯-三氟乙烯）（70%:30%）之间的氢/氘同位素交换

H/D isotopic exchange in water interactions with the ferroelectric copolymer: Poly(vinylidene fluoride-trifluoroethylene) (70%:30%).

作者信息

Rosa Luis G, Yakovkin I N, Dowben P A

机构信息

Department of Physics and Astronomy and the Center for Materials Research and Analysis, University of Nebraska, Lincoln, Nebraska 68588-0111, USA.

出版信息

J Phys Chem B. 2005 Jul 28;109(29):14189-97. doi: 10.1021/jp051737j.

DOI:10.1021/jp051737j

PMID:16852782

Abstract

For both water and heavy water adsorption and absorption on crystalline poly(vinylidene fluoride with trifluoroethylene (30%)), P(VDF-TrFE 70:30), two distinctly different adsorption sites have been identified by thermal desorption spectroscopy. One adsorbed water species resembles ice and there is also an absorbed water species that interacts more strongly with the polymer thin film, and in addition, there is a polymer surface (polymer to ice interface) water species. We find that there is H/D exchange between the water or heavy water molecules and the ferroelectric polymer (largely -(CH2-CF2)-), particularly at the polymer surface.

摘要

对于水和重水在结晶聚（偏二氟乙烯与三氟乙烯（30%）），即P（VDF-TrFE 70:30）上的吸附和吸收，通过热脱附光谱法已确定了两个明显不同的吸附位点。一种吸附的水物种类似于冰，并且还存在一种与聚合物薄膜相互作用更强的吸收水物种，此外，还有一种聚合物表面（聚合物与冰的界面）水物种。我们发现水或重水分子与铁电聚合物（主要是-(CH2-CF2)-）之间存在H/D交换，特别是在聚合物表面。