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Synthesis and degradable properties of cycloaliphatic epoxy resin from renewable biomass-based furfural

机译：可再生生物质基糠醛脂环族环氧树脂的合成及可降解性能

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摘要

Biomass-based cycloaliphatic epoxy resin (Epoxide-A) with two epoxycyclohexyls linked with an acetal group was synthesized by utilizing furfural as a major raw material through a facile two-step preparation: synthesis of a diene precursor and subsequent epoxidation. The chemical structures of Epoxide-A and its precursor were confirmed by FTIR and H-1 NMR spectroscopy. Compared with the commercial cycloaliphatic epoxy resin ERL-4221, the cured Epoxide-A exhibits a similar glass transition temperature and thermal decomposition temperature but significantly higher mechanical modulus, shearing strength and lower coefficient of thermal expansion. More importantly, it is found that the cured Epoxide-A can readily degrade in an acidic aqueous solution due to the labile acetal linkages distributed within the cross-linked network, and the degradation apparently accelerates with the increase of the solution acidity. This peculiar degradation property provides a feasible after-treatment application for the products fabricated with epoxy resin, e.g., in the recovery of precious metal and carbon fiber from electronic waste and carbon fiber-reinforcing composite materials.
机译：通过使用糠醛作为主要原料通过容易的两步制备来合成具有与缩醛基团连接的两种环氧环己酰基的基于生物质的脂环族环氧树脂（环氧化物-A）：合成二烯前体和后续环氧化的合成。通过FTIR和H-1 NMR光谱证实环氧化物-A及其前体的化学结构。与商业环脂族环氧树脂ERL-4221相比，固化的环氧化物-A表现出类似的玻璃化转变温度和热分解温度，而是显着更高的机械模量，剪切强度和较低的热膨胀系数。更重要的是，发现固化的环氧化物-a由于在交联网络内分布的不稳定缩醛键，并且降解随着溶液酸度的增加而显然加速了酸性水溶液。这种特殊的降解性能为用环氧树脂制造的产品提供可行的后处理施用，例如，在电子废物和碳纤维增强复合材料的贵金属和碳纤维中回收中。

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  • 来源
    《RSC Advances》 |2015年第115期|共7页
  • 作者

    Zhao Linni; Zhang Lin; Wang Zhonggang;

  • 作者单位

    Dalian Univ Technol Sch Chem Engn Dept Polymer Sci &

    Mat State Key Lab Fine Chem Dalian 116024 Peoples R China;

    Dalian Univ Technol Sch Chem Engn Dept Polymer Sci &

    Mat State Key Lab Fine Chem Dalian 116024 Peoples R China;

    Dalian Univ Technol Sch Chem Engn Dept Polymer Sci &

    Mat State Key Lab Fine Chem Dalian 116024 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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