文献类型：期刊文献

英文题名：Radiation resistance of poly(methyl methacrylate)/reduced graphene oxide nanocomposites fabricated through latex mixing and in situ reduction

作者：Lin, Yu[1];Liu, Yaohua[1];Zhang, Dongge[1];Chen, Chunlei[1];Wu, Guozhang[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China

年份：2017

卷号：315

起止页码：516

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20170503297609);WOS:【SCI-EXPANDED(收录号:WOS:000395212300052)】；

基金：This work was supported by the National Basic Research Program of China (2013CB035505), the National Nature Science Foundation of China (51503066), Shanghai Sailing Program (14YF1404900), China Postdoctoral Science Foundation (2015M571502) and the Fundamental Research Funds for the Central Universities (22A201514004).

语种：英文

外文关键词：PMMA/RGO composites; Radiation resistance; Thermal oxidative degradation; Radical scavenger; Physical barrier effect

摘要：We present a facile, environmentally friendly approach to fabricate high-radiation -resistance poly (methyl methacrylate)/reduced graphene oxide (PMMA/RGO) composites through latex mixing of anionic PMMA latex particles and graphene oxide dispersion followed by coagulation and in situ hydrazine reduction. Morphological observation reveals the highly uniform dispersion of RGO nanosheets in the PMMA matrix. The dynamic mechanical properties demonstrate that the radiation-induced cross linking and chain scission of PMMA chains are significantly delayed in PMMA/RGO nanocomposites compared with that in pure PMMA irradiated at low and high doses, respectively. Additionally, the incorporation of RGO nanosheets delays the thermal oxidative degradation of the PMMA matrix. This delay is attributed to the fact that RGO can act as a radical scavenger, as confirmed by electron paramagnetic resonance spectroscopy analysis. The physical barrier effect of RGO provides a tortuous path for the diffusion of oxygen molecules and consequently leads to a decrease in peroxy radical concentrations. The synergistic effects keep the graphene-based materials mechanically and thermally stable in the irradiation environment. These findings provide a new strategy for the design of radiation -resistant nanocomposites, which can be considered promising candidates for protective materials in nuclear industrial and aerospace fields. (C) 2017 Elsevier B.V. All rights reserved.