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Exfoliated two-dimensional molybdenum disulfide reinforced epoxy syntactic foams
Journal of Cellular Plastics ( IF 2.5 ) Pub Date : 2021-01-28 , DOI: 10.1177/0021955x20987155
AV Ullas 1, 2, 3 , D Kumar 2 , PK Roy 1
Affiliation  

In this paper, we report the effect of introducing molybdenum disulfide (MoS2) nano-platelets: a two-dimensional metal chalcogenide, on the mechanical properties of hollow glass microballoon (HGM)–epoxy syntactic foams. MoS2 reinforced syntactic foams were prepared by mixing MoS2 nanoplatelets to epoxy containing HGMs; with the amount of MoS2 being varied from 0.01 to 0.04% v/v, while maintaining a constant total filler volume fraction of 40% for all compositions. The mechanical behaviour of reinforced syntactic foam was studied under varied loadings including compressive, tensile and flexural under different strain rate regimes. Introduction of MoS2 led to significant improvements in characteristic mechanical properties, particularly in terms of compressive strength and toughness, which suggest intercalation of MoS2 within the epoxy matrix; however, the presence of relatively larger MoS2 micro particles couldn’t be completely negated. The toughness of the foam, as indicated by the area under the compressive stress-strain curve, was found to increase by ∼21% under optimal conditions. Our results highlight the potential of the two-dimensional MoS2 sheets as a reinforcing agent in syntactic foams.



中文翻译:

剥落的二维二硫化钼增强环氧复合泡沫

在本文中,我们报告了引入二硫化钼(MoS 2)纳米血小板:二维金属硫属元素化物对中空玻璃微气球(HGM)-环氧复合泡沫塑料力学性能的影响。通过将MoS 2纳米片与含环氧的HGMs混合来制备MoS 2增强的复合泡沫塑料。MoS 2的量在0.01至0.04%v / v之间变化,而所有组合物的总填料总体积分数恒定为40%。研究了在不同的应变率条件下,包括压缩,拉伸和弯曲在内的各种载荷下增强复合泡沫的力学行为。MoS 2简介导致特征机械性能的显着改善,特别是在抗压强度和韧性方面,这表明MoS 2嵌入环氧基质中;然而,不能完全否定相对较大的MoS 2微粒的存在。如在压缩应力-应变曲线下的面积所示,发现泡沫的韧性在最佳条件下增加了约21%。我们的结果凸显了二维MoS 2片材在复合泡沫中作为增强剂的潜力。

更新日期:2021-01-29
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