Journal of Materials Science ( IF 3.5 ) Pub Date : 2021-07-13 , DOI: 10.1007/s10853-021-06309-y Xiaodan Li 1 , Xinyu Hu 1 , Xiaoqing Liu 1 , Rui He 1 , Hongyu Liu 1 , Zhehan Yang 1 , Zhaomin Li 1
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Abstract
A zinc-based metal organic framework containing imidazole (ZIF-8) was prepared by the reflux method and blended with bismaleimide–triazine resin (BT resin) to prepare ZIF-8/BT nanocomposites. The research results showed that ZIF-8 had a significant catalytic effect on the curing process of BT resin. With the increase in the content of ZIF-8, the curing temperature of BT resin continuously reduced. It was attributed to synergetic catalysis from Zn2+ and imidazole in ZIF-8 to the self-polymerization of cyanate esters at low temperature, which changed the curing process of BT resin. Meanwhile, ZIF-8 was also well dispersed in BT resin, which increased the initial modulus and toughness of BT resin. Besides, due to the introduction of nanopores, the formation of triazine rings and the increase in the free volume, ZIF-8 could effectively reduce the dielectric constant of BT resin while maintain good heat resistance and moisture resistance. Therefore, ZIF-8 not only introduced nanopores, but also changed the cross-linking structure of BT resin to obtain ultra-low content of low-dielectric materials, which provides a new way to obtain a new generation of low-dielectric materials.
Graphical abstract
中文翻译：
一种获得低介电材料的新方法：用ZIF-8改变双马来酰亚胺-三嗪树脂的固化机制
摘要
通过回流法制备含咪唑的锌基金属有机骨架（ZIF-8），并与双马来酰亚胺-三嗪树脂（BT树脂）共混制备ZIF-8/BT纳米复合材料。研究结果表明，ZIF-8对BT树脂的固化过程具有显着的催化作用。随着ZIF-8含量的增加，BT树脂的固化温度不断降低。这归因于 Zn 2+ 的协同催化作用ZIF-8中的咪唑与氰酸酯在低温下自聚合，改变了BT树脂的固化过程。同时，ZIF-8在BT树脂中的分散性也很好，提高了BT树脂的初始模量和韧性。此外，由于纳米孔的引入、三嗪环的形成和自由体积的增加，ZIF-8可以有效降低BT树脂的介电常数，同时保持良好的耐热性和防潮性。因此，ZIF-8不仅引入了纳米孔，还改变了BT树脂的交联结构，获得了超低含量的低介电材料，为获得新一代低介电材料提供了新途径。
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