• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International conference on smart materials and nanotechnology in engineering >Enhancement of retention and antifouling capability for PVDF UF membrane modified by nano-TiO_2 sol
【24h】

Enhancement of retention and antifouling capability for PVDF UF membrane modified by nano-TiO_2 sol

机译：纳米TiO_2溶胶改性的PVDF超滤膜的保留和防污性能增强

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

摘要

Novel PVDF/TiO_2 hybrid membranes were prepared by phase inversion process from a PVDF/DMAc/PVP/tetrabutyltitanate/water system. The membrane characteristics such as morphology, thermal properties, porosity, water contact angle, tensile strength and separability were investigated by a series of analytical methods including atomic force microscope (AFM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and zeta potential measurements. The performances and surface properties of hybrid and PVDF membranes were tested by the removal of bovine serum albumin (BSA) from aqueous solution, evaluated by using two dyes with different charge (congo red and methylene blue). Based on the experimental results, TiO_2 nanoparticles of a quantum size (～8 nm or less) in anatase crystal structure were obtained from the controlled hydrolysis of tetrabutyltitanate. Besides, TiO_2 sol was introduced into polymer molecule for the hybrid membrane with less than 12 vol % TiO_2 sol to PVDF and contributed to a smooth surface and more apertures due to both the interaction and compatibility between polymer and TiO_2 sol, to which the improvement in hydrophilicity, thermal stability, mechanical strength and antifouling ability is attributed. The observed rejections were optimized for PVDF/TiO_2 hybrid membrane with respect to PVDF membrane. In particular, the pure water permeation flux was increased from126.6 to 166.7 L/m~2·h for hybrid membrane with a relative flux of 80 % compared to 50 % of relative flux observed for PVDF membrane.
机译：通过相转化工艺从PVDF / DMAc / PVP /钛酸四丁酯/水体系制备了新型PVDF / TiO_2杂化膜。通过一系列分析方法，包括原子力显微镜（AFM），X射线衍射（XRD），热重分析（TGA）和热分析，研究了膜的特性，如形态，热性能，孔隙率，水接触角，拉伸强度和可分离性。 Zeta电位测量。通过从水溶液中去除牛血清白蛋白（BSA）来测试杂化膜和PVDF膜的性能和表面性能，并使用两种带电荷的染料（刚果红和亚甲基蓝）对其进行评估。根据实验结果，通过钛酸四丁酯的可控水解得到了锐钛矿型晶体结构的量子尺寸为TiO_2的纳米粒子（〜8 nm或更小）。此外，将TiO_2溶胶引入到PVDF中少于12 vol％的TiO_2溶胶的杂化膜的聚合物分子中，由于聚合物与TiO_2溶胶之间的相互作用和相容性，有助于形成光滑的表面和更多的孔，为此，改进了归因于亲水性，热稳定性，机械强度和防污能力。相对于PVDF膜，针对PVDF / TiO_2杂化膜优化了观察到的废品率。特别地，对于杂化膜，纯水渗透通量从126.6升至166.7 L / m〜2·h，相对通量为80％，而PVDF膜的相对通量为50％。

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