Silica-Epoxy Vitrimer Nanocomposites
Silica-Epoxy Vitrimer Nanocomposites
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DOI：
10.1021/acs.macromol.6b00826
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发表时间：
2016-08-23
期刊：
影响因子：
5.5
通讯作者：
Soulie-Ziakovic, Corinne
中科院分区：
文献类型：
--
作者：
Legrand, Aurelie;Soulie-Ziakovic, Corinne
增强硅树脂-环氧树脂纳米复合材料是一种无溶剂、易于加工和经济的方法，填料含量可达40%。增加二氧化硅含量导致玻璃和橡胶区域更高的模量材料。这些纳米复合材料像永久交联网络一样是不可溶的，但可以通过重新排列网络拓扑结构的热激活交换反应完全放松应力。此外，颗粒的表面功能化改善了填料的分散性，加速了弛豫过程，工业沉淀二氧化硅也得到了类似的结果，这将使玻璃聚合物纳米复合材料能够在工业规模上生产。
Reinforced silica-epoxy vitrimer nanocomposites have been made in a solvent-free, easily processable, and economical way with filler contents up to 40 wt %. Increasing silica content leads to higher modulus materials in both glassy and rubbery regions. These nanocomposites are insoluble like permanent cross-linked networks but can completely relax stresses by thermoactivated exchange reactions that rearrange the network topology. Furthermore, the surface functionalization of particles improves the dispersion of fillers and accelerates the relaxation process Similar results were obtained with industrial precipitated silica, which would allow vitrimer nanocomposites to be produced on an industrial scale.