Energy-Efficient Conversion of Amine-Cured Epoxy Resins into Functional Chemicals Based on Swelling-Induced Nanopores,ACS Sustainable Chemistry & Engineering

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Energy-Efficient Conversion of Amine-Cured Epoxy Resins into Functional Chemicals Based on Swelling-Induced Nanopores
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-01-30 , DOI: 10.1021/acssuschemeng.9b06013
Fei Tian ₁ , Xiong-lei Wang ₁ , Yang Yang ₁ , Wenli An ₁ , Xu Zhao ₁ , Shimei Xu ₁ , Yu-Zhong Wang ₁

Affiliation

Rapid growth of discarded or landfilled thermosetting plastics has caused serious environmental issues and significant waste of energy. Selective degradation of thermosetting plastics into useful chemicals under mild conditions may provide a sustainable approach to address this challenge. In this study, we developed a green and efficient method to cleave the cross-links of amine-cured epoxy resin (EP) to produce new functional chemicals. Complete degradation was achieved using 4 mol/L HNO₃ incubated at 60 °C for 3 h, and it has a higher efficiency than conventional methods. The C–N bonds of EP were selectively cleaved without breaking the skeletal bonds. The swelling-induced nanopores in EP caused by microwave processing exposed the cross-links that resulted in milder degradation conditions. The porous products could be readily separated and recovered. This study demonstrates a feasible approach for the recycling of thermosetting polymers under mild conditions.

中文翻译：

基于溶胀诱导的纳米孔，将胺固化的环氧树脂高效节能地转化为功能化学品

废弃或填埋的热固性塑料的快速增长已引起严重的环境问题和大量的能源浪费。在温和条件下将热固性塑料选择性降解为有用的化学物质可能为解决这一挑战提供可持续的方法。在这项研究中，我们开发了一种绿色有效的方法来裂解胺固化环氧树脂（EP）的交联键以生产新的功能化学品。使用4 mol / L HNO _3可以完全降解在60°C下孵育3小时，其效率比常规方法高。EP的C–N键被选择性裂解，而没有破坏骨架键。微波处理引起的EP中的溶胀诱导纳米孔暴露出交联键，从而导致了较温和的降解条件。多孔产物可以容易地分离和回收。这项研究证明了在温和条件下回收热固性聚合物的可行方法。

更新日期：2020-01-31

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