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相关概念视频

Ion Exchange01:17

Ion Exchange

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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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Anionic Chain-Growth Polymerization: Overview01:20

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The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
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Updated: Jun 8, 2025

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
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净化工艺用于产生离子性氨酸-烯胺聚合物.

Xiaoqi Wang1, Weijue Gao1, Fangong Kong2

  • 1Department of Chemical Engineering and Green Processes Research Centre, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario P7B5E1, Canada.

ACS omega
|November 4, 2024
PubMed
概括

乙醇提取和膜过对于净化氨酸-烯胺-二二甲基化共聚合物是有效的. 与酸化相比,这些方法产生了具有更好的溶解性,热稳定性和花效率的聚合物.

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科学领域:

  • 聚合物化学 聚合物化学
  • 材料科学 材料科学 材料科学

背景情况:

  • 聚合物净化对于高性能材料至关重要.
  • 基于素的共聚合物提供了可持续的替代品.
  • 需要有效的净化方法来净化素-p ((AM) -p ((DADMAC).

研究的目的:

  • 为了评估实验室规模的净化技术,为化 (化-p(AM) -p(DADMAC)) 合物,氨酸-烯胺-二甲二甲基.
  • 为了比较乙醇提取,膜过和酸化的有效性.
  • 描述净化对聚合物的性能和性能的影响.

主要方法:

  • 素,烯胺 (AM) 和二甲基二甲基化 (DADMAC) 的联合聚合.
  • 通过乙醇提取,膜过 (透析) 和酸化进行净化.
  • 使用H NMR进行表征,溶解性测试,热重力测量分析,质学和花研究.

主要成果:

  • 乙醇提取和膜过产生了高纯度的木质素-p ((AM) -p ((DADMAC) 具有更高的产量和可溶性.
  • 1H NMR证实了通过膜透析有效去除未反应的单体.
  • 纯化聚合物表现出增强的热稳定性 (220°C与160°C相比) 和优越的花性能.

结论:

  • 乙醇提取和膜过是素-p (AM) -p (DADMAC) 的优质净化方法.
  • 膜过,特别是具有较大的孔径,是一个环保的净化选项.
  • 在这项研究中,聚合物溶解度显著影响溶液粘度,而不是分子量.