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Emulsion-templated flexible epoxy foams
Polymer ( IF 4.6 ) Pub Date : 2021-01-06 , DOI: 10.1016/j.polymer.2021.123380
Patrick Steindl , Helena Decker , Bernhard Retzl , Qixiang Jiang , Angelika Menner , Alexander Bismarck

Flexible epoxy foams were successfully prepared by curing medium internal phase emulsions (MIPEs) with a continuous organic phase containing epoxy resin and hardener, surfactant and carbon nanotubes and an aqueous internal phase. Curing the MIPEs at ambient temperature resulted in interconnected polyepoxide foams with average pore size of about 10 μm, while curing the MIPEs (with carbon nanotubes as a thickening agent) at 50 °C resulted in epoxy foams with pore sizes of one magnitude higher. The polyepoxide foams were compressible up to a strain of 70% of their original height and did not fracture. The polyepoxide foams were resilient with energy loss coefficients ranging from 40% to 60%, representing their energy adsorption during cyclic loading.



中文翻译:

乳液模板柔性环氧泡沫

通过将中型内相乳液(MIPE)与包含环氧树脂和硬化剂,表面活性剂和碳纳米管的连续有机相以及水性内相固化,成功制备了柔性环氧泡沫。在环境温度下固化MIPE会导致互连的聚环氧泡沫塑料的平均孔径约为10μm,而在50°C下固化MIPE(以碳纳米管作为增稠剂)会导致孔径大于一个量级的环氧泡沫塑料。聚环氧泡沫塑料可压缩至其原始高度的70%,并且不会破裂。聚环氧化物泡沫具有回弹力,能量损失系数在40%至60%的范围内,代表了它们在循环加载过程中的能量吸收。

更新日期:2021-01-12
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