Han Yuhang, Huang Xinlu, Chi Kunxiang, Liu Jing, Zhang Yunmao, Zhang Jian, Hou Xu
State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China.
Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, Fujian 361102, People's Republic of China.
J Phys Chem Lett. 2024 Sep 5;15(35):8997-9002. doi: 10.1021/acs.jpclett.4c01928. Epub 2024 Aug 26.
Gas flow control is essential in multifarious fields, such as chemical engineering, environmental governance, and biomedical science. More precise regulation, especially tunable gas flow rates, will spark further applications in smart valves, microreactors, and drug delivery. Here, we propose a crystallization-induced liquid gate (CILG) comprising a supersaturated gating liquid confined within a solid framework capable of tunable gas flow rates under steady-state pressure in a simple and compact manner. When ultrasound is employed to stimulate the crystallization, the CILG exhibits different gas transport behaviors due to the adjustable pore sizes modulated by crystal morphologies under varied ultrasound intensities. Additionally, the exothermic crystallization process allows CILG with variable gas permeability to be observable via infrared imaging. Moreover, we demonstrate the potential applications of CILG in infrared-monitored flow-regulating valves and gas-involved chemical reactors.
气流控制在众多领域至关重要，如化学工程、环境治理和生物医学科学等。更精确的调节，尤其是可调的气体流速，将推动其在智能阀门、微反应器和药物输送等领域的进一步应用。在此，我们提出一种结晶诱导液门（CILG），它由一种过饱和的门控液体组成，该液体被限制在一个固体框架内，能够在稳态压力下以简单紧凑的方式实现可调的气体流速。当采用超声刺激结晶时，由于在不同超声强度下晶体形态调制的孔径可调，CILG表现出不同的气体传输行为。此外，放热结晶过程使得具有可变气体渗透率的CILG能够通过红外成像进行观察。而且，我们展示了CILG在红外监测流量调节阀和涉及气体的化学反应器中的潜在应用。
