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Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

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Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
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Updated: Sep 10, 2025

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
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可逆生物基粘合剂使闭环工程复合材料成为可能

Jin Lv1, Daxin Zhang2, Xinkai Li1

  • 1National Key Laboratory of Advanced Polymer Materials, Polymer Research Institute, Sichuan University, Chengdu, China.

Nature communications
|August 23, 2025
PubMed
概括

研究人员使用纤维素纳米限制开发了一种新的生物基粘合剂. 这种超强,可回收的粘合剂具有可切换的粘合性,减少对环境的影响,并使工程复合材料的闭环系统成为可能.

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科学领域:

  • 材料科学
  • 绿色化学
  • 聚合物科学

背景情况:

  • 基于石化产品的合成树脂粘合剂对环境和健康构成风险.
  • 开发具有强粘度的可持续生物质粘合剂是一个关键的研究领域.
  • 目前强粘合剂,特别是多层复合材料存在回收挑战.

研究的目的:

  • 使用超分子连接的纳米封闭网络创建一个超强但可切换的生物基粘合剂.
  • 通过一个动态交联网络,实现基于粘合剂的复合材料的有效回收.
  • 评估拟议的粘合剂战略对环境和健康的好处.

主要方法:

  • 在超分子网络中利用纤维素纳米 (36.5-46.3%).
  • 嵌入热响应的二硫化物键以实现可切换的粘附.
  • 评估粘附强度,热响应脱落,以及可回收性.

主要成果:

  • 在4厘米2面积上实现了优异的附着强度 (6.02 MPa),支持65公斤.
  • 已证明即时热响应脱离 (开关比>600,响应时间 ≤10秒).
  • 通过动态网络破坏实现复合材料的完全拆卸和回收.

结论:

  • 纳米封闭网络策略提供了超强,可切换和可回收的生物基粘合剂.
  • 这种方法显著减少了环境负担 (7.52 * 102 PAF m3d/kg排放量) 和健康负担 (2.04 * 10−4例/kg排放量).
  • 建立了闭环工程复合材料的范式, 提供了绿色智能粘合剂的突破.