氨基硅烷功能化六方氮化硼对环氧纳米复合材料物理化学及力学性能的增强作用

Reinforcing effects of aminosilane-functionalized h-BN on the physicochemical and mechanical behaviors of epoxy nanocomposites.

作者信息

Mostovoy A S, Vikulova M A, Lopukhova M I

机构信息

Yuri Gagarin State Technical University of Saratov, Polytechnichskaya St., 77, Saratov, Russia, 410054.

出版信息

Sci Rep. 2020 Jun 30;10(1):10676. doi: 10.1038/s41598-020-67759-z.

DOI:10.1038/s41598-020-67759-z

PMID:32606355

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7327049/

Abstract

The results of this study confirm the possibility of the directional regulation of operational properties of epoxy composites by the use of small additives of hexagonal boron nitride (h-BN), providing the creation of epoxy composites with high performance properties. The effectiveness of h-BN surface modification by γ-aminopropyltriethoxysilane and the formation of strong chemical bonds at the polymer matrix/filler interface has been proved, which ensures an increase in physico-mechanical characteristics of epoxy composites: bending stress increases by 142% and bending modulus increases by 52%, strength increases by 53% and tensile elastic modulus increases by 37%, toughness increases by 400% and Brinell hardness increases by 96%, compared with an unfilled plasticized epoxy composite.

摘要

本研究结果证实了通过使用少量六方氮化硼（h-BN）添加剂来定向调节环氧复合材料操作性能的可能性，从而能够制备出具有高性能的环氧复合材料。已证明γ-氨丙基三乙氧基硅烷对h-BN进行表面改性以及在聚合物基体/填料界面形成强化学键的有效性，这确保了环氧复合材料物理力学性能的提高：与未填充增塑环氧复合材料相比，弯曲应力增加142%，弯曲模量增加52%，强度增加53%，拉伸弹性模量增加37%，韧性增加400%，布氏硬度增加96%。