In this study, the influence of modified nanosilica on the curing, mechanical, and swelling resistance properties of natural rubber and ethylene-propylene-diene monomer blends (NR/EPDM; 70/30 phr/phr) was examined. The composites were developed using the melt compounding method, with nanosilica derived from rice husk ash serving as the reinforcing nanofiller in NR/EPDM composites. Two modifiers were employed in this study: a 2:1 ratio of TESPT (bis(3-triethoxysilylpropyl)tetrasulfide) to TWEEN-20 (polyoxyethylene (20) sorbitan monolaurate) (Modifier 1), and thioctic acid (TA) (Modifier 2). In comparison to pure NR/EPDM blends, the inclusion of TA-modified nanosilica significantly enhanced tensile and tear strength by up to 76% and 48%, respectively. Moreover, NR/EPDM nanocomposites filled with TA-modified nanosilica exhibited reduced swelling at a given loading when compared to their counterparts filled with TESPT/TWEEN-20-modified nanosilica.

在本研究中，研究了改性纳米二氧化硅对天然橡胶和乙烯-丙烯-二烯单体共混物（NR/EPDM；70/30 phr/phr）的固化、机械和耐溶胀性能的影响。该复合材料采用熔融复合方法开发，以稻壳灰中提取的纳米二氧化硅作为 NR/EPDM 复合材料中的增强纳米填料。本研究使用了两种改性剂：TESPT（双（3-三乙氧基甲硅烷基丙基）四硫化物）与 TWEEN-20（聚氧乙烯 (20) 失水山梨糖醇单月桂酸酯）（改性剂 1）和硫辛酸 (TA)（改性剂 2）的比例为 2:1 ）。与纯 NR/EPDM 共混物相比，TA 改性纳米二氧化硅的加入使拉伸强度和撕裂强度分别显着提高了 76% 和 48%。此外，与填充 TESPT/TWEEN-20 改性纳米二氧化硅的对应物相比，填充 TA 改性纳米二氧化硅的 NR/EPDM 纳米复合材料在给定负载下表现出较低的膨胀。