The effect of deep eutectic solvent (DES) modified silica on the properties of nature rubber (NR) composites were investigated. The DES is an environment-friendly and low-cost solvent, which was prepared by mixing choline chloride and urea in a 1:2 molar ratio. The NR composites filled with DES modified silica were prepared and the properties were tested. The interaction between the DES and silica were characterized by Fourier transform infrared spectroscopy (FTIR), the interaction between silica and silica were tested by differential scanning calorimetry (DSC). The dynamic properties, such as rolling resistance and wet skid resistance, and were tested by dynamic mechanical analysis (DMA). Morphologies of the composites were characterized by scanning electron microscopy (SEM). The results indicate that the DES can interact with silica by hydrogen bond to improve the compatibility between the rubber and silica. When the content of DES was 3 phr, the tensile strength, modulus at 300%, tear strength, and the crosslinking density of the composites was increased. At the same time, the proper content of DES can reduce the rolling resistance of the vulcanized rubber while maintaining good wet skid resistance.

研究了深共熔溶剂（DES）改性二氧化硅对天然橡胶（NR）复合材料性能的影响。DES是一种环保、低成本的溶剂，由氯化胆碱和尿素以1:2的摩尔比混合而成。制备了填充DES改性二氧化硅的NR复合材料并进行了性能测试。DES和二氧化硅之间的相互作用通过傅里叶变换红外光谱（FTIR）表征，二氧化硅和二氧化硅之间的相互作用通过差示扫描量热法（DSC）测试。动态性能，如滚动阻力和湿滑阻力，并通过动态力学分析（DMA）进行测试。通过扫描电子显微镜（SEM）表征复合材料的形貌。结果表明，DES可以通过氢键与二氧化硅相互作用，提高橡胶与二氧化硅的相容性。当DES的含量为3 phr时，复合材料的拉伸强度、300%模量、撕裂强度和交联密度增加。同时，适当的DES含量可以降低硫化胶的滚动阻力，同时保持良好的抗湿滑性能。