Construction of an In Situ-Generated Nanoscale Organic–Inorganic Hybrid System Using Hydrogen Bonding Interaction To Assist Thermal Properties of Resins

作者：Yuhang Wang, Jingyi Wang, Jingyi Wang, Zichun Ding, Xitong Cheng, Runze Liu, Jianing Guo, Haoran Liu, Lishuai Zong, Xigao Jian, Jinyan Wang, Jinyan Wang · 发表于：ACS Applied Materials & Interfaces · 年份：2024 · DOI：10.1021/acsami.4c14729 · 被引用次数：8 · 研究领域：Synthesis and properties of polymers、Epoxy Resin Curing Processes、Advanced ceramic materials synthesis

With the rapid development of science and technology, high-temperature-resistant resin systems are facing more severe challenges in extreme applications. To further improve the comprehensive thermal properties of phthalonitrile resins, an in situ generation of a high-temperature-resistant phthalonitrile resin achieving an organic–inorganic hybridization network is reported. A 3-aminophenol phthalonitrile containing –NH 2 is used as a material to hybridize with prepared calcium phosphate nano-oligomers (CPOs), and the hybrid precursor is named as CAPN. Notably, the hydrogen bonding plays a crucial role in the hybrid, as nanosize control of CPOs, and in the synthesis of CAPN. The presence of hydrogen bonding interaction is proved by Fourier transform infrared, Raman, 31 P solid-state nuclear magnetic resonance spectra, isothermal differential scanning calorimetric testing, and calculation of apparent activation energy ( E a ). Based on organic–inorganic hybrid cross-linked networks formed by resins during the curing process, 50CAPN (the hybrid containing 50 wt % CPOs) has superior thermo-mechanical properties [glass transition temperature ( T g ) > 580 °C] and thermal stability [5% pyrolysis temperature ( T d5% (N 2 ) = 574 °C, T d5% (air) = 543 °C)] than the blending system 50HAPN [the mixture with 50 wt % nanohydroxyapatite (HAP)]. Additionally, under extreme high temperature and combustion conditions, it demonstrates that 50CAPN has more stable thermo-oxidative aging resista...