Dynamics of water sorbed in reverse osmosis polyamide membrane

被引：26
|
作者：
Sharma, V. K. [1 ]
Singh, P. S. [2 ]
Gautam, S. [1 ]
Maheshwari, P. [3 ]
Dutta, D. [3 ]
Mukhopadhyay, R. [1 ]
机构：
[1] Bhabha Atom Res Ctr, Div Solid State Phys, Bombay 400085, Maharashtra, India
[2] CSIR, Cent Salt & Marine Chem Res Inst, Bhavnagar 364002, Gujarat, India
[3] Bhabha Atom Res Ctr, Div Radiochem, Bombay 400085, Maharashtra, India
来源：
JOURNAL OF MEMBRANE SCIENCE | 2009年 / 326卷 / 02期
关键词：
Dynamics; Polyamide membrane; Neutron scattering; DSC; ELASTIC NEUTRON-SCATTERING; NANOFILTRATION MEMBRANES; SELF-DIFFUSION; JUMP DIFFUSION; RO MEMBRANES; ANNIHILATION; SPECTROSCOPY; MOLECULES; LIQUID; FLUIDS;
D O I：
10.1016/j.memsci.2008.11.003
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Dynamical motion of water sorbed in reverse osmosis polyamide membrane (ROPM) material is reported as studied by quasielastic neutron scattering (QENS) technique. The ROPM studied here has pore size of 4.4 angstrom as determined by positron annihilation lifetime spectroscopy. Analysis of the QENS data showed that diffusion behavior of the water within the membrane is describable by random jump diffusion model. A much longer residence time is found as compared to bulk water. Positive shift of the freezing point as observed in differential scanning calorimetry indicates presence of strong attractive interaction corroborating the slower diffusivity as observed in QENS. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：667 / 671
页数：5
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