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[1]陈 喆,王 帅,张永静,等.反渗透膜的微结构分析[J].武汉工程大学学报,2015,37(08):32-36.[doi:10. 3969/j. issn. 1674-2869. 2015. 08. 006]
 ,,et al.Microstructure in reverse osmosis membranes[J].Journal of Wuhan Institute of Technology,2015,37(08):32-36.[doi:10. 3969/j. issn. 1674-2869. 2015. 08. 006]
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
37
期数:
2015年08期
页码:
32-36
栏目:
材料科学与工程
出版日期:
2015-08-31

文章信息/Info

Title:
Microstructure in reverse osmosis membranes
文章编号:
1674-2869(2015)08-0032-05
作者:
陈 喆王 帅张永静付秋明马志斌
武汉工程大学材料科学与工程学院,湖北 武汉 430074
Author(s):
CHEN Zhe WANG Shuai ZHANG Yong-jing FU Qiu-min MA Zhi-bin
School of Material Science and Engineering, Wuhan Institute of Technology, Wuhan 430074,China
关键词:
纳滤膜复合膜自由体积截留率正电子湮没
Keywords:
nanofiltration membranecomposite membranefree-volume holerejectionpositron annihilation.
分类号:
TB34, TL84
DOI:
10. 3969/j. issn. 1674-2869. 2015. 08. 006
文献标志码:
A
摘要:
为理解孔洞结构对反渗透膜分离性能的影响,对反渗透膜的孔洞大小及其分布特性进行了研究. 实验采用东丽公司的反渗透膜UTC70和UTC80作为研究对象,利用扫描电镜分析了两种薄膜的断面形貌;采用正电子湮没γ能谱技术评价了样品中孔洞随深度的分布情况;利用正电子湮没寿命技术研究了反渗透膜致密层中的孔洞大小. 实验结果发现:反渗透膜UTC70和UTC80均由较薄的表面致密层和较厚的疏松层组成;两种膜的疏松层厚度约为45 μm,表面致密层的厚度均为230 nm;薄膜UTC80致密层中的自由体积孔洞小于薄膜UTC70致密层内的自由体积孔洞. 致密层中自由体积的不同应该是薄膜UTC80相比于薄膜UTC70,具有更高的截留率、更低的水通量的原因.
Abstract:
To understand the influence of hole structure on the separation property of reverse osmosis membrane, the size and the depth profile of the free-volume holes were studied. We analyzed the cross -section morphology of two commercial reverse osmosis membranes (UTC70 and UTC80) provided by Toray, using the scan electron microscopy. The positron annihilation γ ray spectroscopy was used to characterize the depth profile of the holes, and the positron annihilation lifetime technique was applied to evaluate the mean sizes of the holes in the membranes. The results reveal that both of UTC70 and UTC80 consist of a surface dense layer(45 μm)and a beneath porous layer(230 nm),moreover, the free-volume holes in the dense layer of UTC80 are smaller than those in UTC70. We assume that the difference in hole size is the main reason that UTC80 ex

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2015-03-25基金项目:国家自然科学基金(112052118)作者简介:陈喆(1981-),男,湖北云梦人,副教授,博士,研究方向:复合膜的表面与界面.
更新日期/Last Update: 2015-09-01