Scholarlink

<p>The brittleness seriously affects the application of benzoxazine, so how to improve the performance of benzoxazine becomes an important challenge. In this study, polyethyleneimine (PEI) was grafted to the surface of hydrotalcite (LDH) by silane coupling agent KH560 to obtain functional hydrotalcite PEI-LDH, and PEI-LDH was added to the benzoxazine (Bz) matrix as a functional filler to obtain a new benzoxazine polymer composite. The prepared poly(PEI-LDH/Bz) has high mechanical properties. This improvement is attributed to the interface phase PEI-KH560, which improves the roughness and free energy of the LDH surface, and the high surface energy demonstrated by PEI-LDH significantly improves the strength and stiffness of the composite by improving the microstructure, introducing residual stress, enhancing the intermolecular attraction, forming a gradient structure, and optimizing the surface roughness. The existence of gradient modulus interfacial layer in poly(PEI-LDH/Bz) composites was confirmed by atomic force microscopy (AFM).</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Double-stage grafting interface engineering strategy for constructing LDH/Bz composites: optimization of multi-scale interface layers and enhancement of performance

  • 期刊论文

  • 发表日期：

    2026年4月11日

查看全文
  • Lu Zhang,
  • Yu Luo,
  • Jun Liu,
  • Wei Zhang,
  • Liwu Zu,
  • Shaobo Dong,
  • Tianyu Lan

摘要

The brittleness seriously affects the application of benzoxazine, so how to improve the performance of benzoxazine becomes an important challenge. In this study, polyethyleneimine (PEI) was grafted to the surface of hydrotalcite (LDH) by silane coupling agent KH560 to obtain functional hydrotalcite PEI-LDH, and PEI-LDH was added to the benzoxazine (Bz) matrix as a functional filler to obtain a new benzoxazine polymer composite. The prepared poly(PEI-LDH/Bz) has high mechanical properties. This improvement is attributed to the interface phase PEI-KH560, which improves the roughness and free energy of the LDH surface, and the high surface energy demonstrated by PEI-LDH significantly improves the strength and stiffness of the composite by improving the microstructure, introducing residual stress, enhancing the intermolecular attraction, forming a gradient structure, and optimizing the surface roughness. The existence of gradient modulus interfacial layer in poly(PEI-LDH/Bz) composites was confirmed by atomic force microscopy (AFM).