Center for Physics and Technological Research - CEFITEC, Physics Department, Faculty of Sciences and Technology, Universidade Nova de Lisboa , 2829-516 Caparica, Portugal.
J Agric Food Chem. 2013 Oct 9;61(40):9672-9. doi: 10.1021/jf4015729. Epub 2013 Sep 25.
Transport properties of natural (noncompressed) cork were evaluated for water and ethanol in both vapor and liquid phases. The permeability for these permeants has been measured, as well as the sorption and diffusion coefficients. This paper focuses on the differences between the transport of gases' relevant vapors and their liquids (water and ethanol) through cork. A transport mechanism of vapors and liquids is proposed. Experimental evidence shows that both vapors and liquids permeate not only through the small channels across the cells (plasmodesmata), as in the permeation of gases, but also through the walls of cork cells by sorption and diffusion as in dense membranes. The present study also shows that cork permeability for gases was irreversibly and drastically decreased after cork samples were exposed to ethanol or water in liquid phase.
本文评估了天然（未压缩）软木在气相和液相中对水和乙醇的传输性质。测量了这些渗透物的渗透率以及吸附和扩散系数。本文重点研究了气体相关蒸气与其液体（水和乙醇）通过软木传输的差异。提出了一种蒸气和液体的传输机制。实验证据表明，蒸气和液体不仅通过细胞间的小通道（胞间连丝）渗透，就像气体渗透一样，而且还通过软木细胞壁的吸附和扩散渗透，就像致密膜一样。本研究还表明，软木样品在液相中暴露于乙醇或水后，其对气体的渗透性会不可逆地大幅降低。
