• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>journal of applied polymer science >Synthesis of liquid crystalline triheptyl cellulose and its blend thin‐film composite membrane for air separation
【24h】

Synthesis of liquid crystalline triheptyl cellulose and its blend thin‐film composite membrane for air separation

机译：Synthesis of liquid crystalline triheptyl cellulose and its blend thin‐film composite membrane for air separation

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

AbstractLiquid crystalline triheptyl cellulose (THC) was synthesized directly from cellulose acetate and heptyl bromide with dimethyl sulfoxide as a single‐component solvent. Synthetic conditions were studied with respect to reaction temperature, time, and yield. The molecular structure and liquid crystalline character of the THC obtained as sticky, soft, and birefringent solids at room temperature were investigated by IR, NMR, elemental analysis, and a polarizing microscope. The composite membranes consisting of a THC/ethyl cellulose blend as a dense thin selective layer and polyethersulfone as a porous thick support layer were fabricated and their air‐separation performances were studied by a constant pressure–variable volume method. The data show that the air‐separation performances increase dramatically with operating parameters such as pressure and temperature. No apparent dependence of air‐separation ability on operating time and THC/ethyl cellulose ratio was observed. © 1994 John Wiley

著录项

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