基于动态硼酸酯键的可重塑酚醛树脂及其复合材料  

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

作　　者：行小龙 黄金鑫 张健[1] 刘祎 阮英波 张承双[1,2,3] XING Xiaolong;HUANG Jinxin;ZHANG Jian;LIU Yi;RUAN Yingbo;ZHANG Chengshuang(Xi’an Aerospace Composites Research Institute,Xi’an 710025,China;Shaanxi Key Laboratory of Aerospace Composites,Xi’an 710025,China;Xi’an Key Laboratory of Advanced Polymer Composites,Xi’an 710025,China)

机构地区：[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

出　　处：《复合材料科学与工程》2024年第12期34-42,共9页Composites Science and Engineering

基　　金：国家重点研发计划(2022YFB3403500)。

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。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.

关 键 词：酚醛树脂 硼酸酯 可重塑 耐烧蚀复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]