本研究是添加二硫化鉬以提升丁基橡膠機械強度及阻氣性。二硫化鉬是二維層狀結構，層與層之間是利用凡德瓦力互相吸引。可以利用超音波震盪機破壞其堆疊的型態，使二硫化鉬分層成單層奈米片厚度約為0.7nm~1.1nm，藉由奈米片與丁基橡膠的交互作用以及二維奈米片可以阻隔橡膠分子鏈之間氣體的通過路徑來達到本實驗的目的。加入乙硫醇/二硫化鉬奈米片之丁基橡膠複合材料拉神強度會比未加入二硫化鉬奈米片之丁基橡膠最大增強到30.7％，而壬硫醇/二硫化鉬奈米片之丁基橡膠複合材料拉神強度會比未加入二硫化鉬奈米片之丁基橡膠最大增強到34.8％。至於阻氣性方面乙硫醇/二硫化鉬奈米片之丁基橡膠複合材料會比未加入二硫化鉬奈米片之丁基橡膠增加53.5％，而壬硫醇/二硫化鉬奈米片之丁基橡膠複合材料會增加49.6％。二硫化鉬奈米片在經過表面改質後確實能提升丁基橡膠之機械強度及阻氣性。

Emerging two-dimensional (2D) materials such as Molybdenum disulfide (MoS2) offer opportunities to tailor the mechanical properties and gas barrier of polymeric materials. In this study, MoS2 was exfoliated to a monolayer. The thickness of the MoS2 monolayer was 0.7 nm for MoS2-ethanethiol and 1.1 nm for MoS2-nonanethiol. MoS2 monolayers were added to butyl rubber to prepare a MoS2-butyl rubber nanocomposite at concentrations of 0.5, 1, 3, and 5 phr. The tensile stress showed a maximum enhancement of about 30.7% for MoS2-ethanethiol-butyl rubber and 34.8% for MoS2-nonanethiol-butyl rubber compared to pure butyl rubber. In addition, the gas barrier increased by 53.5% in MoS2-ethanethiol-butyl rubber and 49.6% in MoS2-nonanethiol-butyl rubber. MoS2 nanosheets enhanced the mechanical properties and gas barrier of butyl rubber when dispersed in butyl rubber. And the nanocomposites used to manufacture pharmaceutical stoppers with high mechanical properties and gas barrier.

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