4.7 Article

Co-sintering synthesis of bi-layer titania ultrafiltration membranes with intermediate layer of sol-coated nanofibers

期刊

JOURNAL OF MEMBRANE SCIENCE
卷 365, 期 1-2, 页码 225-231

出版社

ELSEVIER
DOI: 10.1016/j.memsci.2010.09.005

关键词

Ceramic membrane; Ultrafiltration; Sol-coated nanofibers; Co-sintering

资金

  1. National Basic Research Program of China [2009CB623400]
  2. National High Technology Research and Development Program of China [2007AA030303, 2009AA033005]
  3. National Nature Science Foundation of China [20636020]

向作者/读者索取更多资源

The preparation of titania ultrafiltration membranes with intermediate layer of sol-coated nanofibers is briefly described. In this process, titiania nanofibers cover on the porous substrate to produce uniform layer with high porosity and flux. The use of titania nanoparticles from sol has been found to bring an improvement on the mechanical strength of the titania nanofiber membrane due to the formation of sintering neck between nanofibers with colloidal particles (sol) at lower sintering temperature. In order to reduce the pore size and achieve high separation efficiency, titania colloidal particulate sol is used to coat on the top of the titania nanofiber layer and then co-sintered at the suitable sintering temperature of the titania gel (480 degrees C) to prepare ultrafiltration membranes. Furthermore, the coating times of titania sol are optimized based on the measurements supplied by permeation and separation performance and a delicate control of the coating times indeed plays a key role in the preparation of the defect-free membrane with high performance. In this work it is found that the prepared membrane has homogeneous surface without obvious defects in case of three coatings of titania sol co-sintered with the fiber layer at 480 degrees C. Property tests display that the pure water flux reaches 1100 L m(-2) h(-1) bar(-1) while the molecular weight cut-off is 32,000. (C) 2010 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。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据