• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Separation and Purification Technology >Evaluation of the cleaning of a new hydrophobic membrane for osmotic evaporation
【24h】

Evaluation of the cleaning of a new hydrophobic membrane for osmotic evaporation

机译：评估用于渗透蒸发的新型疏水膜的清洁

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Osmotic evaporation(OE)is a membrane contactor process which can be used to concentrate aqueous solutions with minimal thermal or mechanical damage.Generally OE is carried out with hydrophobic polymeric membranes,but these membranes can be easily deformed under operating conditions causing the wetting of the pores.In this study we modify the surface of tubular ceramic membranes in order to be used in OE process.Flat and tubular ceramic macroporous alumina membranes with 2 x 10~(-7)m of mean pore size were modified by grafting with fluoroalkylsilane.Scanning electron microscopy,mercury porosimetry,contact angle measurements and water penetration pressure(WPP)were used to characterize the porous structure and the hydrophobicity of grafted membranes.The resistance of the hydrophobic layer to cleaning agents(1% NaOH,1% HNO3,1% Ultrasil-10,200 ppm Cl~(-1)and vapour sterilization)was evaluated by WPP and the performance in OE process was measured after each cycle of cleaning.The cleaning with 1% NaOH and 1% Ultrasil-10 produced a reduction of 15 and 21% of the WPP,respectively.Indeed,the membranes can be used in the OE process while the WPP is higher than the transmembrane pressure applied.
机译：渗透蒸发（OE）是一种膜接触器工艺，可用于浓缩水溶液，而对热或机械的损害最小在本研究中，我们对管状陶瓷膜的表面进行了改性，以用于OE工艺。通过接枝氟烷基硅烷对平均孔径为2 x 10〜（-7）m的扁平和管状陶瓷大孔氧化铝膜进行了改性。用扫描电子显微镜，水银孔率法，接触角测量和透水压力（WPP）表征了接枝膜的多孔结构和疏水性。疏水层对清洁剂的抵抗力（1％NaOH，1％HNO3,1）通过WPP评估％Ultrasil-10,200 ppm Cl〜（-1）和蒸汽灭菌），并在每个清洁周期后测量OE工艺的性能。 h 1％NaOH和1％Ultrasil-10分别减少了WPP的15％和21％。实际上，该膜可用于OE工艺，而WPP高于施加的跨膜压力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号