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相关概念视频

Hydrolysis of Chlorobenzene to Phenol: Dow Process01:10

Hydrolysis of Chlorobenzene to Phenol: Dow Process

3.2K
Simple aryl halides do not react with nucleophiles under normal conditions. However, the reaction can proceed under drastic conditions involving high temperatures and high pressure to give the substituted products. For example, chlorobenzene is converted to phenol using aqueous sodium hydroxide at 350 °C under high pressure by the Dow process. The reaction follows an elimination-addition mechanism involving a benzyne intermediate. Here, the chloride ion is...
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Updated: Sep 18, 2025

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by &#960;-&#960; Stacking Interactions
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PDMS膜使用作为固的分子间隔器用于恢复.

Xiangyan Li1,2, Yan Zhuang1,2, Chang Liu3

  • 1State Key Laboratory of Green Biomanufacturing Beijing University of Chemical Technology Beijing PR China.

Engineering in life sciences
|June 20, 2025
PubMed
概括
此摘要是机器生成的。

这项研究通过引入间隔剂来增强聚二甲基 (PDMS) 膜的挥发性有机化合物 (VOC) 清除能力,显著提高了扩散和分离性能.

关键词:
通过蒸发进行蒸发.醇是一种醇.菲尼尔 (Phenyl) 是一种类型.聚二甲基西洛二氧化.醇-乙烯是一种醇-乙烯.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 化学工程是化学工程的重要组成部分.
  • 分离科学 分离科学

背景情况:

  • 聚甲基 (PDMS) 膜在去除挥发性有机化合物 (VOC) 方面面临限制,原因是分子扩散受到限制.
  • 改善分子运输对于提高PDMS膜在分离芳香化合物的效率至关重要.

研究的目的:

  • 在PDMS中设计一个高效的扩散通道,通过结合间隔器.
  • 优化基于PDMS的膜,以消除高级挥发性有机化合物 (VOC),特别是回收.

主要方法:

  • 通过乙烯点击反应,通过化学交叉连接乙烯接种PDMS (乙烯-PDMS) 与乙烯和乙烯终结PDMS (乙烯-PDMS).
  • 在PDMS矩阵中引入基作为间隔器,以扩大自由体积并促进扩散.
  • 优化参数,包括dwinilbenzene含量,蒸发温度,光启动器度和乙烯-PDMS粘度.

主要成果:

  • 作为间隔剂的divinylbenzene的引入显著增加了自由体积半径,增强了扩散.
  • 优化的-PDMS膜在70°C时实现了10.9的分离因子和3959.66 g m-2 h-1的流量,用于0.1%重量%的/水溶液.
  • 与未经修改的PDMS相比,增强的Phenyl-PDMS膜显示分离因子增加2.05倍,流量增加3.54倍.

结论:

  • 开发的-PDMS膜通过扩大扩散通道提供了有效的结构设计,用于通过扩大扩散通道去除芳香化合物.
  • 这一进步显著提高了回收的蒸发 (PV) 性能,超过了未经修改的PDMS.
  • 该研究通过增强的分离技术,为生物医学和生物工程做出了宝贵的贡献.