期刊
JOURNAL OF MEMBRANE SCIENCE
卷 375, 期 1-2, 页码 304-312出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2011.03.058
关键词
Polyelectrolyte complex membrane; Sodium alginate; Gelatin; Propylene; Dehydration
资金
- Petrochina Research Program, National Basic Research Program of China [2009CB623404, 2009CB724700]
- Program of Introducing Talents of Discipline to Universities [B06006]
- State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University [201013]
A series of sodium alginate-gelatin polyelectrolyte complex (PEC) membranes were prepared by physical blending and utilized for propylene dehydration. The chemical and physical structures of the membranes were characterized by scanning electron microscope (SEM), Fourier transform infrared (FT-IR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and positron annihilation lifetime spectroscopy (PALS). To elucidate the structure-performance relationship, water vapor sorption and diffusion properties were investigated. For dehumidification tests, the water vapor permeance and water/propylene selectivity increased simultaneously with the gelatin content because of enhanced water uptake and reduced free volume cavity size. When gelatin content was 60 wt.%, the PEC membrane exhibited the highest permeance of 39.8 m(3)(STP)/(m(2) h bar) and an infinite permselectivity, which far outperformed the pure sodium alginate membrane and gelatin membrane. A tentative explanation for this interesting result was presented taking into account of the competition of sorption and diffusion. (C) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据