Silicone rubber (SR) composites were fabricated using poplar leaves graphene (PG). PG was synthesized from poplar leaves and modified-poplar leaves graphene (MPG) was obtained by treating graphene with a silane coupling agent γ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\gamma $$\end{document}-aminopropyltriethoxysilane (KH550). The biosynthesized PG and MPG were characterized by using organic elemental analysis, X-ray photoelectron spectroscopy, atomic force microscopy and scanning electron microscopy (SEM). The PG-modified SR composites were studied by using their mechanical properties, Fourier transform infrared spectroscopy, SEM and thermogravimetric analysis. The results showed that the PG synthesized by poplar leaves had high-carbon content and purity. The MPG was more evenly dispersed into SR than the PG, the mechanical properties of the MPG/SR composites were better than those of the PG/SR when the MPG content was 0.1 phr (parts per hundred rubber), the tensile strength and elongation at break were increased by 36.2 and 19.4% respectively and the wear resistance was increased by 57.1%. The thermal stability of the MPG/SR was higher than that of the PG/SR and SR. This important discovery could not only solve the problem of the origin of graphene, but also broaden the application of SR composites.

中文翻译：

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使用 KH550 改性杨树叶石墨烯制备的硅橡胶复合材料

使用杨树叶石墨烯 (PG) 制造硅橡胶 (SR) 复合材料。PG由杨树叶合成，改性杨树叶石墨烯（MPG）通过用硅烷偶联剂γ\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\ usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\gamma $$\end{document}-氨基丙基三乙氧基硅烷（KH550） . 通过使用有机元素分析、X 射线光电子能谱、原子力显微镜和扫描电子显微镜 (SEM) 对生物合成的 PG 和 MPG 进行了表征。利用其力学性能、傅里叶变换红外光谱、扫描电镜和热重分析对PG改性SR复合材料进行了研究。结果表明，杨树叶合成的PG碳含量高，纯度高。MPG在SR中的分散比PG更均匀，当MPG含量为0.1 phr（每百份橡胶的份数）时，MPG/SR复合材料的力学性能优于PG/SR，拉伸强度和伸长率为断裂分别提高了36.2%和19.4%，耐磨性提高了57.1%。MPG/SR 的热稳定性高于 PG/SR 和 SR。这一重要发现不仅解决了石墨烯的来源问题，而且拓宽了SR复合材料的应用。当 MPG 含量为 0.1 phr（每百份橡胶的份数）时，MPG/SR 复合材料的力学性能优于 PG/SR，拉伸强度和断裂伸长率分别提高 36.2%和 19.4%，磨损阻力增加了 57.1%。MPG/SR 的热稳定性高于 PG/SR 和 SR。这一重要发现不仅解决了石墨烯的起源问题，而且拓宽了SR复合材料的应用。当 MPG 含量为 0.1 phr（每百份橡胶的份数）时，MPG/SR 复合材料的力学性能优于 PG/SR，拉伸强度和断裂伸长率分别提高 36.2%和 19.4%，磨损阻力增加了 57.1%。MPG/SR 的热稳定性高于 PG/SR 和 SR。这一重要发现不仅解决了石墨烯的来源问题，而且拓宽了SR复合材料的应用。