Nanopore size effect on critical infiltration depth of liquid nanofoam as a reusable energy absorber
Nanopore size effect on critical infiltration depth of liquid nanofoam as a reusable energy absorber
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DOI：
10.1063/1.5065485
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发表时间：
2019-01
影响因子：
3.2
通讯作者：
Mingzhe Li;Lijiang Xu;Weiyi Lu
中科院分区：
文献类型：
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作者：
Mingzhe Li;Lijiang Xu;Weiyi Lu
纳米环境中的液体流动是一种先进的能量吸收机制。虽然液体从纳米孔流出的过程已被证明对系统的能量吸收效率具有显着影响，但其机制仍然知之甚少。在这里，我们研究了液体纳米泡沫（LN）系统的液体渗透行为，通过控制渗透深度。由不同的非水溶性液相和具有宽孔径分布的疏水纳米多孔二氧化硅组成的LN样品在准静态条件下以两种不同的加载模式压缩，即，单步压缩和召唤式压缩。在这两种加载模式下观察到了相当不同的力学行为，表明液体从纳米孔中流出是由临界渗透深度D* 决定的。纳米孔径对D* 的影响进一步研究了一个召唤步骤循环测试。结果表明，D* 随着孔径变小而增加，这与纳米环境中的气体溶解度和扩散速率有关。还研究了临界浸渗深度的电解质浓度和温度依赖性。这些研究结果有助于更好地理解液体从纳米孔中流出的过程，并有助于设计新一代可重复使用的能量吸收系统。纳米环境中的液体流动已被用作能量吸收的先进机制。虽然液体从纳米孔流出的过程已被证明对系统的能量吸收效率具有显着影响，但其机制仍然知之甚少。在这里，我们研究了液体纳米泡沫（LN）系统的液体渗透行为，通过控制渗透深度。由不同的非水溶性液相和具有宽孔径分布的疏水纳米多孔二氧化硅组成的LN样品在准静态条件下以两种不同的加载模式压缩，即，单步压缩和召唤式压缩。在这两种加载模式下观察到了相当不同的力学行为，表明液体从纳米孔中流出是由临界渗透深度D* 决定的。纳米孔径对D* 的影响进一步研究了一个召唤步骤循环测试。研究表明，D* 随着por.
Liquid flow in nano-environment has been utilized as an advanced mechanism of energy absorption. While the process of liquid outflow from nanopores has been shown to have a significant effect on the system’s energy absorption efficiencies, its mechanism remains poorly understood. Here, we have studied the liquid defiltration behavior of liquid nanofoam (LN) systems by controlling the infiltration depth. The LN samples, composed of a different non-wettable liquid phase and hydrophobic nanoporous silica with wide pore size distribution, have been compressed in two different loading modes under the quasi-static condition, i.e., the single-step compression and consecutive-step compression. Considerably different mechanical behaviors have been observed in these two loading modes, suggesting that the liquid outflow from nanopores is determined by the critical infiltration depth D*. The nanopore size effect on D* is further studied by a consecutive-step cyclic test. It has been shown that D* increases as the pore size gets smaller, which is related to gas solubility and diffusion rate in the nano-environment. The electrolyte concentration and temperature dependences of the critical infiltration depth have also been investigated. These findings provide a better understanding of the liquid outflow from nanopores and can be exploited to facilitate the design of next-generation reusable energy absorption systems.Liquid flow in nano-environment has been utilized as an advanced mechanism of energy absorption. While the process of liquid outflow from nanopores has been shown to have a significant effect on the system’s energy absorption efficiencies, its mechanism remains poorly understood. Here, we have studied the liquid defiltration behavior of liquid nanofoam (LN) systems by controlling the infiltration depth. The LN samples, composed of a different non-wettable liquid phase and hydrophobic nanoporous silica with wide pore size distribution, have been compressed in two different loading modes under the quasi-static condition, i.e., the single-step compression and consecutive-step compression. Considerably different mechanical behaviors have been observed in these two loading modes, suggesting that the liquid outflow from nanopores is determined by the critical infiltration depth D*. The nanopore size effect on D* is further studied by a consecutive-step cyclic test. It has been shown that D* increases as the por...