Zhang Li-Zhi
Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Education Ministry, School of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510640, China.
J Memb Sci. 2006 May 1;276(1):91-100. doi: 10.1016/j.memsci.2005.09.035. Epub 2005 Oct 21.
A novel composite supported liquid membrane has been prepared for ventilation air moisture recovery. The membrane is composed of three layers: two hydrophobic protective layers and a sandwiched hydrophilic support layer in which LiCl solution is immobilized to facilitate water vapor transfer. A test is conducted to measure the moisture permeation rate through the composite membrane. Various resistances in the cell and in the composite membrane are clarified. Linear equilibrium relations between humidity, temperature, and LiCl concentration in the liquid solution layer are obtained to aid in the model set-up. It has been found that the mean moisture permeation rate through the composite membrane is around 1.14 × 10 kg m s, almost two times higher than that through a solid hydrophilic cellulose acetate membrane with comparative thickness. Further, the supported liquid layer only accounts for 12% of the total moisture transfer resistance in the cell, indicating that there is much potential for further performance improvement.
一种用于通风空气水分回收的新型复合支撑液膜已被制备出来。该膜由三层组成：两个疏水保护层和一个夹在中间的亲水支撑层，其中固定有LiCl溶液以促进水蒸气传输。进行了一项测试以测量通过复合膜的水分渗透速率。明确了电池和复合膜中的各种阻力。获得了液体溶液层中湿度、温度和LiCl浓度之间的线性平衡关系，以辅助建立模型。研究发现，通过复合膜的平均水分渗透速率约为1.14×10 千克·米·秒，几乎是通过具有相同厚度的固体亲水性醋酸纤维素膜的两倍。此外，支撑液层仅占电池中总水分传输阻力的12%，这表明进一步提高性能有很大潜力。
