Electron beam radiation crosslinking of natural rubber filled with silica–graphene blend prepared by latex mixing: dynamic mechanical analysis, volume resistivity, and degradation

IF 1.2 4区化学 Q4 POLYMER SCIENCE

Journal of Rubber Research Pub Date : 2023-07-26 DOI:10.1007/s42464-023-00213-7

Worawat Jansomboon, Surapich Loykulnant, Peerapan Dittanet, Paweena Prapainainar

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Abstract

The mechanical properties of EB-irradiated natural rubber (NR) composites were improved by a synergistic effect of adding silica (SiO₂) and graphene nanoplatelets (GE) mixture into NR matrix, reported in a previous work. In this study, dynamic mechanical analysis (DMA) was performed, from which volume resistivity and degradation properties were determined. Latex NR compound filled with SiO₂/GE mixture was cured by EB irradiation to form NR composites. SEM images and the EDXS elemental mapping indicated good dispersion of GE and SiO₂/GE in the NR matrix. The DMA showed that the storage moduli of NR composites filled with fillers were higher than that of NR_-EB. Using 2.5 phr of fillers, which is below the percolation threshold, volume resistivity properties of all NR composites remained unchanged relative to the pure NR and with varying EB doses in the range of 100–250 kGy. Finally, it was found that adding fillers into NR composites caused a decrease in water absorption of irradiated NR composite at 70 °C and a relative humidity of 80%. According to the authors’ previous work and the present results, this novel NR composites showed a potential in devices related to high-voltage application requiring electrical insulation with enhanced mechanical properties.

Graphical abstract

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乳胶混合制备的二氧化硅-石墨烯共混物填充天然橡胶的电子束辐射交联：动态力学分析、体积电阻率和降解

在先前的工作中报道，通过在天然橡胶基体中添加二氧化硅（SiO2）和石墨烯纳米片（GE）混合物的协同作用，EB辐照的天然橡胶（NR）复合材料的力学性能得到了改善。在本研究中，进行了动态力学分析（DMA），从中确定了体积电阻率和降解性能。采用电子束辐照法制备了填充SiO2/GE的胶乳NR复合材料。SEM图像和EDXS元素图谱表明，GE和SiO2/GE在NR基体中具有良好的分散性。DMA结果表明，填料填充NR复合材料的储能模量高于NR-EB。使用低于渗滤阈值的2.5 phr填料，所有NR复合材料的体积电阻率性能相对于纯NR保持不变，EB剂量在100–250 kGy范围内变化。最后，研究发现，在70°C和80%的相对湿度下，向NR复合材料中添加填料会降低辐照NR复合材料的吸水率。根据作者之前的工作和目前的结果，这种新型NR复合材料在需要增强机械性能的电绝缘的高压应用设备中显示出潜力。图形摘要

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来源期刊

Journal of Rubber Research 化学-高分子科学

自引率

15.40%

发文量

审稿时长

3 months

期刊介绍： The Journal of Rubber Research is devoted to both natural and synthetic rubbers, as well as to related disciplines. The scope of the journal encompasses all aspects of rubber from the core disciplines of biology, physics and chemistry, as well as economics. As a specialised field, rubber science includes within its niche a vast potential of innovative and value-added research areas yet to be explored. This peer reviewed publication focuses on the results of active experimental research and authoritative reviews on all aspects of rubber science. The Journal of Rubber Research welcomes research on: the upstream, including crop management, crop improvement and protection, and biotechnology; the midstream, including processing and effluent management; the downstream, including rubber engineering and product design, advanced rubber technology, latex science and technology, and chemistry and materials exploratory; economics, including the economics of rubber production, consumption, and market analysis. The Journal of Rubber Research serves to build a collective knowledge base while communicating information and validating the quality of research within the discipline, and bringing together work from experts in rubber science and related disciplines. Scientists in both academia and industry involved in researching and working with all aspects of rubber will find this journal to be both source of information and a gateway for their own publications.