本研究采用乳液共混法制备了二氧化硅@多壁碳纳米管/天然橡胶(SiO2@MWCNTs/NR)复合材料，使用TEM对SiO2@MWCNTs纳米复合填料进行形貌表征，通过万能拉力试验机对制备的纳米复合材料进行力学性能进行分析，并利用热重-微商热重(TG-DTG)在不同的升温速率下研究了在氮气氛围中少量纳米SiO2@MWCNTs/NR复合材料的热降解动力学，实验结果表明:接枝二氧化硅的碳纳米管呈现离散分布状态，二氧化硅也没有明显团聚。SiO2@MWCNTs/NR复合材料的断裂拉伸应力比NR提高了56。84%，断裂伸长率降低了 13。66%;通过非模型法如 Kissinger 法和 Bosewell 法求取热降解过程的活化能 E 等参数，从而对纳米SiO2@MWCNTs/NR复合材料与NR空白样品的热降解过程进行比较，得到两种样品在热降解反应过程中动力学参数的差异，进而指导样品的使用。
Preparation and Thermal Stability Analysis of SiO2@MWCNTs/Natural Rubber Composites
SiO2@MWCNTs/NR was prepared using the emulsion blending method.The SiO2@MWCNTs was characterized using transmission electron microscopy(TEM),and the mechanical properties of SiO2@MWCNTs/NR composites were analyzed.The thermal degradation kinetics of a small amount of SiO2@MWCNTs/NR nanocomposite under a nitrogen atmosphere was studied at different heating rates using thermogravimetric analysis and differential thermogravimetry(TG-DTG).The experimental results showed that the carbon nanotubes grafted with silica showed a discrete distribution state,and silica did not significantly agglomerate.The tensile strength of SiO2@MWCNTs/NR composites was 56.84%higher than that of NR.In comparison,the elongation at break decreased by 13.66%.The activation energy E and other kinetic parameters of the thermal degradation process were obtained using non-modeling methods such as Kissinger,and Bosewell.The thermal degradation processes of SiO2@MWCNTs/NR nanocomposites and NR samples were compared.The differences in the kinetic parameters of the two samples during the thermal degradation reaction were determined,guiding the use of the samples.
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