• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Surface Science >Superhydrophobic and breathable SiO_2/polyurethane porous membrane for durable water repellent application and oil-water separation
【24h】

Superhydrophobic and breathable SiO_2/polyurethane porous membrane for durable water repellent application and oil-water separation

机译：超疏水且透气的SiO_2 /聚氨酯多孔膜，可实现持久的防水应用和油水分离

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

Electrospun polyurethane membrane with porous structure could be used for waterproof and breathable applications, however, due to polar groups in the soft segment of polyurethane, water would easily permeate the membrane. The water repellency of polyurethane membrane could be improved by grafting hydrophobic silica particles onto the membrane to construct rough surface and low energy epidermis. Polyurethane membrane was chemically modified with 4,4'-methylenebis(phenyl isocyanate) to obtain a reactive group, which was then coupled with (3-aminoproyl) triethoxysilane. Thereafter, the treated membrane was added to the preparation solution of hydrophobic silica particles. Herein, the particles constructed the rough surface of the membrane, and hexadecyltrimethoxysilane endowed the membrane with hydrophobic epidermis. The resultant membrane exhibited significant hydrophobicity with high water contact angles (WCA) and low sliding angles (SA) to different aqueous solutions. Under cyclic stretching, the modified membrane displayed durable water repellency (WCA varied between 152.7 and 154.9 degrees, SA fluctuated between 5.0 and 6.5 degrees) and high breathability (8.4 kg-m(-2).d(-1)). Furthermore, the hydrophobic membrane was superoleophilic and had high permeation fluxes for various oils. It could effectively separate (98.5%) the dichloromethane-water mixture over 30 separation cycles.
机译：具有多孔结构的电纺聚氨酯膜可用于防水和透气应用，但是，由于聚氨酯软链段中的极性基团，水很容易渗透到膜中。通过将疏水性二氧化硅颗粒接枝到膜上以构造粗糙的表面和低能的表皮，可以提高聚氨酯膜的疏水性。用4,4'-亚甲基双（异氰酸苯基酯）对聚氨酯膜进行化学改性，以获得反应性基团，然后将其与（3-氨基丙基）三乙氧基硅烷偶联。之后，将处理过的膜添加到疏水性二氧化硅颗粒的制备溶液中。在此，颗粒构成了膜的粗糙表面，十六烷基三甲氧基硅烷使膜具有疏水性表皮。所得的膜表现出显着的疏水性，对不同的水溶液具有高的水接触角（WCA）和低的滑动角（SA）。在循环拉伸下，改性膜表现出持久的防水性（WCA在152.7至154.9度之间变化，SA在5.0至6.5度之间波动）和高透气性（8.4 kg-m（-2）.d（-1））。此外，疏水膜是超亲油的，并且对于各种油具有高渗透通量。在30个分离循环中，它可以有效分离（98.5％）二氯甲烷-水混合物。

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