石墨烯/玻璃块体复合材料的制备及性能

Preparation and Properties of Graphene/Glass Bulk Composites

本文报道了还原氧化石墨烯/钠钙硅(rGO/SLS)玻璃块体复合材料的热压制备和力学性能。首先以3-氨基丙基三乙氧基硅烷为表面活性剂修饰玻璃粉微粒;然后在水溶液中带负电的氧化石墨烯(GO)纳米片通过静电自组装与被氨基修饰过带正电的玻璃颗粒相结合生成复合颗粒。通过高温真空热压烧结,GO被还原成rGO,从而原位生成rGO/SLS玻璃块状复合材料。结果表明,rGO均匀分布在玻璃基质中,并明显增强了复合材料的机械性能。rGO/SLS玻璃块体复合材料中rGO的含量为0.5%(质量分数)时,复合材料的弯曲强度比纯的SLS玻璃提高了约一倍。

An in-situ strategy for the preparation of reduced graphene oxide/sodium calcium silicon(rGO/SLS)glass bulk composites using 3-aminopropyltriethoxysilane as a surfactant was reported.GO nanosheets that were negatively charged in an aqueous solution were combined with positively charged glass particles modified by amino groups through electrostatic self-assembly to generate composite particles.Through high temperature vacuum hot press sintering,GO was reduced to rGO,and rGO/SLS bulk composites were in situ produced.Results show that rGO is evenly distributed in the glass matrix and greatly enhances the mechanical properties of rGO/SLS bulk composites.With a 0.5%(mass fraction),addition of rGO in the rGO/SLS bulk composite,the flexural strength of the composite is about double that of pure SLS glass.