The influence of MoS2/carbon dots hybrid particles on mechanical properties of natural rubber latex

文献类型： 外文期刊

第一作者： Kang, Jiawei

作者： Kang, Jiawei;Chen, Jing;Lin, Yianhong;Zhang, Liying;Yang, Hongyan;Liao, Lusheng;Zhang, Fuquan

作者机构：

关键词： Natural rubber; Molybdenum disulfide; Carbon dots; Mechanical properties

期刊名称：POLYMER BULLETIN （ 影响因子：3.2； 五年影响因子：2.9 ）

ISSN： 0170-0839

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Molybdenum disulfide(MoS2) has a special structure and excellent mechanical properties, making it a promising reinforcing filler for polymers. Carbon dots (CDs) have good antioxidant properties, and the addition of CDs during the synthesis of MoS2 can affect its morphology and size. In this work, a new one-step hydrothermal synthesis process was employed to prepare CDs/MoS2 hybrid particles. Thiourea, sodium molybdate, and glucose were employed as sources of sulfur, molybdenum, and carbon, respectively. The structure and morphology of MoS2 and CDs/MoS2 were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), mapping surface scanning (SEM-EDS), and Fourier transform infrared spectroscopy (FTIR). The results show that the prepared 2H-MoS2 is stacked into flower-like spheres with size around 2-10 mu m; with the formation of CDs, the size of MoS2 rapidly decreases to less than 1 mu m and the CDs are evenly distributed on its surface with mass ratio of 40.2% (CDs in CDs/MoS2). Subsequently, the CDs/MoS2 were used as reinforcing fillers for natural rubber (NR) latex. The results of mechanical properties show that tear strength, tensile strength, modulus, and elongation at break are increased by the addition of CDs/MoS2 in a very lower loading, and the maximum increment ratio is 45.6% and 12.1% when compared to NR-0; the dynamic mechanical analysis and cross-link density results indicated that the CDs/MoS2 can simultaneously improve rigidity and elasticity of NR. The thermal stability results suggest that the CDs/MoS2 shows positive effects on thermal stability of NR.

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