Water diffusion at short times in hydrophilic polymer studied by an ion beam analysis technique

被引：15

作者：

Drew, DW ^{[1
]}

Clough, AS ^{[1
]}

Jenneson, PM ^{[1
]}

Shearmur, TE ^{[1
]}

vanderGrinten, MGD ^{[1
]}

Riggs, P ^{[1
]}

机构：

[1] UNIV LONDON, LONDON HOSP, COLL MED, LONDON, ENGLAND

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1996年 / 119卷 / 03期

关键词：

D O I：

10.1016/0168-583X(96)00462-4

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Gravimetric measurements establishing D2O as a good model for H2O diffusion in a hydrophilic polymer are reported. An MeV He-3 ion microbeam technique is described which enables the measurement of the diffusion coefficient for initial Fickian diffusion of deuterated water into hydrophilic polymer. A raster scanned microbeam is used to bombard a sample cooled by liquid nitrogen. Spectra from He-3 interactions with both deuterium and carbon in the polymer matrix are collected. The latter is used to normalise water concentrations resulting from exposure of the polymer to heavy water for different times. A diffusion coefficient is deduced for initial water diffusion into tetrahydrofurfylmethacrylate/Poly(ethylmethacrylate) (THFM/PEM) at 37 degrees C.

引用

页码：429 / 432

页数：4

共 10 条

[1] ENERGY-LEVELS OF LIGHT-NUCLEI A=13-15 [J].