研究高密度聚乙烯和聚基在液态有机载体中的老化行为
Jyothsna Surisetty1, Mohammadhossein Sharifian2, Thomas Lucyshyn1
1Polymer Processing, Department of Polymer Engineering and Science, Montanuniversität Leoben, 8700 Leoben, Austria.
Polymers
|November 25, 2023
概括
聚基 (POK) 显示出更好的长期稳定性比高密度聚乙烯 (HDPE) 液态有机载 (LOHC) 燃料. POK吸收的燃料更少,降解更少,使其成为储存应用的有希望的替代品.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 储能 储能 储能 储能 储能 储能
背景情况:
- 是一种重要的未来能源载体,但其低体积密度需要高效的储存解决方案.
- 液态有机载体 (LOHC) 是一种在热塑性中在环境条件下储存的方法.
- 长期暴露于LOHC可以降解聚合物油箱层,影响性能和效率,需要材料研究.
研究的目的:
- 为了比较高密度聚乙烯 (HDPE) 和多基 (POK) 在接触液态有机载体 (LOHC) 时的长期稳定性.
- 评估LOHC暴露对HDPE和POK物理,化学和机械性能的影响.
- 为了确定适合用于燃料应用的替代聚合物.
主要方法:
- 将HDPE和POK样品暴露在25°C和60°C的LOHC中,长达500小时.
- 使用微分扫描热度计 (DSC),热重度计分析 (TGA),里埃变换红外光谱 (FTIR) 和机械测试进行分析.
- 测量燃料吸收和评估材料降解和性能变化.
主要成果:
- 与POK相比,HDPE表现出显著的燃料吸附和塑化,导致更明显的材料降解.
- 在LOHC暴露下,POK显示燃油吸收率较低,耐降解性更强.
- 在60°C的老化加速了两种聚合物的材料降解,而HDPE受到的影响更大.
- 经过老化后,POK的结晶度略有增加,这影响了其机械性能.
结论:
- 与高密度聚乙烯 (HDPE) 相比,聚乙烯 (POK) 在与液态有机载体 (LOHC) 一起使用时,表现出优越的长期稳定性和较低的燃料吸收性.
- POK是热塑性燃料的有希望的替代材料,提供更好的耐降解性.
- 对POK的性能和潜在修改的进一步研究可以提高其适用于先进的储存系统的适用性.
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