复合材料科学与工程 ›› 2024, Vol. 0 ›› Issue (12): 34-42.DOI: 10.19936/j.cnki.2096-8000.20241228.005

• 基础研究 • 上一篇    下一篇

基于动态硼酸酯键的可重塑酚醛树脂及其复合材料

行小龙1,2,3, 黄金鑫1, 张健1, 刘祎1, 阮英波1,2,3, 张承双1,2,3   

  1. 1.西安航天复合材料研究所,西安 710025;
    2.陕西省航天复合材料重点实验室,西安 710025;
    3.西安市先进聚合物基复合材料重点实验室,西安 710025
  • 收稿日期:2024-07-22 出版日期:2024-12-28 发布日期:2025-01-14
  • 作者简介:行小龙(1992—),男,博士,工程师,研究方向为树脂基烧蚀防热材料,18629251140@163.com。
  • 基金资助:
    国家重点研发计划(2022YFB3403500)

Remodelable phenolic resin and its composites based on dynamic boronic ester bonds

XING Xiaolong1,2,3, HUANG Jinxin1, ZHANG Jian1, LIU Yi1, RUAN Yingbo1,2,3, ZHANG Chengshuang1,2,3   

  1. 1. Xi’an Aerospace Composites Research Institute, Xi’an 710025, China;
    2. Shaanxi Key Laboratory of Aerospace Composites, Xi’an 710025, China;
    3. Xi’an Key Laboratory of Advanced Polymer Composites, Xi’an 710025, China
  • Received:2024-07-22 Online:2024-12-28 Published:2025-01-14

摘要: 针对传统酚醛树脂基复合材料不具备可重塑性的问题,采用水热法制备了一种侧基含有苯基硼酸结构的新型含硼酚醛树脂(BNR),加热固化后可以形成具备可重塑性能的硼酸酯交联型酚醛树脂。研究结果表明:通过水热法可以高效地制备出BNR树脂,产率可达到94.1%;不需要外加固化剂,BNR在160 ℃下加热即可固化;固化树脂具有高热稳定性,成炭率可以达到66%,可以用作耐烧蚀复合材料基体;与传统的酚醛树脂相比,硼酸酯交联型酚醛树脂在热的作用下可以实现完全的应力松弛,赋予复合材料优异的可重塑性。因此,BNR树脂有作为新型耐烧蚀复合材料树脂基体的潜力。

关键词: 酚醛树脂, 硼酸酯, 可重塑, 耐烧蚀复合材料

Abstract: A novel boron-containing phenolic resin (BNR) with a phenylboronic acid structure as side groups was successfully synthesized using a hydrothermal method to address the issue of none remouldability in traditional phenolic resin-based composites. The BNR resin demonstrated a high yield of 94.1% and could be efficiently prepared. Upon heating at 160 ℃, the BNR resin underwent curing without any curing agents, forming a boronic ester cross-linked phenolic resin with reshaping ability. The cured resin exhibited remarkable thermal stability, with a carbon yield of 66%, making it suitable as a flame-retardant composite matrix. Furthermore, compared to traditional phenolic resins, the phenolic resin with boronic ester cross-linkages displayed complete stress relaxation under heat and imparted excellent remouldability to the composites. These findings highlight the potential of the BNR resin as a promising candidate for the development of advanced and versatile ablative composites.

Key words: phenolic resin, boronic ester, remouldability, ablative composite

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