• 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 >Preparation of a Polymeric Membrane with a Fine Porous Structure by Dry Casting
【24h】

Preparation of a Polymeric Membrane with a Fine Porous Structure by Dry Casting

机译：通过干铸法制备具有微孔结构的聚合物膜

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

We prepared a polymeric membrane with a fine porous structure from polystyrene (PS), poly(ethylene glycol) (PEG), and solvent solutions by exploiting the phase separation induced in the Course of dry casting. To determine the effect of the drying rate and phase separation on the developed porous structure, six different solvents, including toluene, chlorobenzene, tetrahydrofuran, methyl ethyl ketone, 1,4-dioxane, and chloroform, were used. The pore size and density drastically changed with the different solvents and drying conditions. The polymer concentration at the onset of the phase separation into PEG-rich and PS-rich phases also strongly affected the cellular structure. The solubility of PEG into PS and the solvent Solutions changed the concentration, which corresponded to the viscosity of the PS-rich solution at the onset of the phase separation. The higher solubility of PEG in the solutions delayed the onset of phase separation during drying and increased the viscosity. The higher viscosity and the higher drying rate prevented the phase-separated PEG domains from coalescing and made the resulting pore size smaller and the pore density larger. The finest porous structure, with a pore size of approximately 1 mu m and a pore density of 0.08 1/mu m(2), was prepared from PS/PEG and a 90 wt % chloroform solution. (c) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 111: 2518-2526, 2009
机译：我们利用干铸过程中引起的相分离，由聚苯乙烯（PS），聚乙二醇（PEG）和溶剂溶液制备了具有精细多孔结构的聚合物膜。为了确定干燥速率和相分离对发达的多孔结构的影响，使用了六种不同的溶剂，包括甲苯，氯苯，四氢呋喃，甲乙酮，1,4-二恶烷和氯仿。孔径和密度随溶剂和干燥条件的不同而急剧变化。在开始分离成富含PEG和富含PS的相的聚合物浓度也强烈影响了细胞结构。 PEG在PS和溶剂溶液中的溶解度改变了浓度，这与相分离开始时富含PS的溶液的粘度相对应。 PEG在溶液中的较高溶解度延迟了干燥过程中相分离的开始并增加了粘度。较高的粘度和较高的干燥速率防止了相分离的PEG结构域聚结，并使所得的孔尺寸较小，并且孔密度较大。由PS / PEG和90 wt％的氯仿溶液制得的细孔结构最好，孔径大约为1μm，孔密度为0.08 1 /μm（2）。 （c）2008 Wiley Periodicals，Inc. J Appl Polym Sci 111：2518-2526，2009

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