[1]张显球,张林生,吕锡武,等.一种求得纳滤膜截留分子量的方法[J].东南大学学报(自然科学版),2007,37(5):883-886.[doi:10.3969/j.issn.1001-0505.2007.05.029]
 Zhang Xianqiu,Zhang Linsheng,Lü Xiwu,et al.Method for obtaining molecular weight cut-off of nanofiltration membrane[J].Journal of Southeast University (Natural Science Edition),2007,37(5):883-886.[doi:10.3969/j.issn.1001-0505.2007.05.029]
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一种求得纳滤膜截留分子量的方法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
37
期数:
2007年第5期
页码:
883-886
栏目:
化学化工
出版日期:
2007-09-20

文章信息/Info

Title:
Method for obtaining molecular weight cut-off of nanofiltration membrane
作者:
张显球12 张林生1 吕锡武1 杜明霞2
1 东南大学能源与环境学院, 南京 210096; 2 南京师范大学动力工程学院, 南京 210042
Author(s):
Zhang Xianqiu12 Zhang Linsheng1 Lü Xiwu1 Du Mingxia2
1 School of Energy and Environment, Southeast University, Nanjing 210096,China
2 School of Power Engineering, Nanjing Normal Universty, Nanjing 210042, China
关键词:
纳滤膜 截留分子量 孔径 模型
Keywords:
nanofiltration membrane molecular weight cut-off pore radius model
分类号:
TQ028.8
DOI:
10.3969/j.issn.1001-0505.2007.05.029
摘要:
利用回归方法,建立表征纳滤膜分离性能常用的有机分子的Stokes半径(rs)与分子量(Ms)之间定量关系方程.根据提出的纳滤膜截留分子量(Mp)所对应的分子Stokes半径与膜的等效细孔半径(rp)相等的假设,得到Mprp之间的关系方程,即只要知道纳滤膜细孔半径就能求得Mp.通过NF270纳滤膜对葡萄糖和蔗糖的透过实验,采用细孔模型(SHP模型)和S-K模型对NF270纳滤膜的rp进行了估算,进而计算出NF270膜的截留分子量为540左右,与供应商提供的截留分子量基本相符.利用文献数据计算了几种纳滤膜的Mp,与文献报道的结果基本一致.因此,为膜截留分子量的估算提供了一种更加方便、实用的新方法.
Abstract:
The correlation between the Stokes radius(rs)and molecular weight(Ms)was established for uncharged solutes that were usually used for the characterization of nanofiltration membrane. Based on the assumption that the membrane pore radius(rp)equals the Stokes radius of uncharged solute with molecular weight(Ms)equaling the molecular weight cut-off(Mp), Mp can be expressed as the function of rp,in other words, if rp is known, Mp can be calculated. Permeation experiments of aqueous solution of neutral solutes with spiral membrane(NF270)were conducted, and the membrane pore radius was obtained from steric-hindrance pore(SHP)model. Then Mp of NF270 membrane was worked out as about 540, which is close to 600 provided by manufacturers. In addition, the Mp calculated for other membranes are also in agreement with literature data, which shows that the method put forward by authors is reliable and it can be a new method for obtaining the molecular weight cut-off.

参考文献/References:

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相似文献/References:

[1]张显球,张林生,吕锡武,等.一种求得纳滤膜荷电密度的快速方法[J].东南大学学报(自然科学版),2008,38(6):1034.[doi:10.3969/j.issn.1001-0505.2008.06.019]
 Zhang Xianqiu,Zhang Linsheng,Lü Xiwu,et al.Method for obtaining the charge density of nanofiltration membrane[J].Journal of Southeast University (Natural Science Edition),2008,38(5):1034.[doi:10.3969/j.issn.1001-0505.2008.06.019]

备注/Memo

备注/Memo:
基金项目: 江苏省高新技术产业化基金资助项目(BG2001028)、江苏省高等学校自然科学基金资助项目(04KJK610109).
作者简介: 张显球(1971—),男,博士生,副教授; 张林生(联系人),男,教授,博士生导师,zhanglinsheng@seu.edu.cn.
更新日期/Last Update: 2007-09-20