聚合物涂层共价有机框架作为气体储存的多孔液体
Rachel E Mow1,2, Glory A Russell-Parks3,2, Grace E B Redwine3,2
1Materials Science Program, Colorado School of Mines, Golden, Colorado 80401, United States.
概括
研究人员从COF合物中开发了新的多孔液体 (PL) 材料,以有效地储存H2. 这些PLs保持流动性和H2结合在室温附近,克服了冷存储的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 纳米技术纳米技术
背景情况:
- 多孔液体 (PLs) 由于其流动性和永久性多孔性,在气体储存和运输方面具有优势.
- 现有的PL通常需要冷温度来储存像H2这样的气体,这限制了它们的实际应用.
- 开发可以在环境温度附近储存H2的PLs对于推进气体储存技术至关重要.
研究的目的:
- 开发和描述基于共价有机框架 (COF) 的新型多孔液体,能够在环境温度附近进行可逆的H2复合.
- 创建一种流体材料,以保持固体框架的多孔性和气结合能力.
- 研究材料组成对H2扩散和储存特性的影响.
主要方法:
- 合成的Cu(I) 载荷的COF合物被涂上了使用原子转移激素聚合 (ATRP) 进行的聚甲基酸盐 (PDMS-MA) -甲酸盐.
- 使用传输电子显微镜和动态光散射量化涂层厚度.
- 通过使用二氧化碳异温和二氧化碳吸附测量 (DRIFTS) 评估孔隙性和Cu (I) 位点保存.
- 通过使用DRIFTS和温度编程脱吸,评估了H2的吸附和扩散.
主要成果:
- 在控制厚度的COF合体上成功创建了强大的PDMS-MA涂层.
- 多孔液体 (PL) 配方保留了COF的多孔性和Cu (I) 协调部位.
- 在温和的制冷温度下证明了H2的运输和吸收,明显低于冷要求.
- 观察到H2扩散受到涂层和液体矩阵的玻璃过渡温度的影响.
结论:
- 开发了一种基于Cu(I) -COF的新型多孔液体,用于在周围环境温度附近储存和运输H2.
- 该材料克服了传统多孔材料的冷限制.
- 这些发现突出了通过PL组成量身定制气体扩散和储存的潜力,为先进的气体管理提供了一个有希望的途径.
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