A Model for Adsorption and Diffusion in Water Vapor Barrier Films

被引:10
作者
Lian, Songyou [1 ,2 ]
Zhang, Jintong [1 ]
Wang, Jiangyong [1 ]
Xu, Congkang [1 ]
Swart, Hendrik C. [2 ]
Terblans, Jacobus J. [2 ]
机构
[1] Shantou Univ, Dept Phys, 243 Daxue Rd, Shantou 515063, Guangdong, Peoples R China
[2] Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa
来源
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2021年 / 258卷 / 06期
基金
新加坡国家研究基金会;
关键词
barrier films; defects; diffusion; polyethylene terephthalate; water vapor transmission rate; THIN-FILMS; OXIDE; PERMEATION; COATINGS; LAYER; MULTILAYER; TRANSPORT; DEFECTS; POLY(ETHYLENE-TEREPHTHALATE); PERFORMANCE;
D O I
10.1002/pssb.202000609
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
A model for describing the diffusion behavior of water vapor in barrier films is developed and applied to the cases of 1) pure polyethylene terephthalate (PET); 2) an inorganic thin film (ITF) with defects on a PET substrate (ITF/PET); and 3) PET/ITF/PET. The normalized concentration profile and the relative mass of water vapor in the ITF/PET and PET/ITF/PET barrier films are simulated as a function of diffusion time by considering the sorption and desorption of water vapor. The number of atoms penetrating the barrier films is quantitatively evaluated by the concentration gradient of water vapor, which is related to the water vapor transmission rate (WVTR). The simulated WVTR values in pure PET, PET/SiOx, and PET/SiOx/ORM layered structures are in good agreement with the experimental ones.
引用
收藏
页数:7
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