Mechanical and Gas Barrier Properties of Poly(L-Lactic Acid) by Plasma-Enhanced Chemical Vapor Deposition of SiOx.
writer：Song Shuxin, Liang Min, Qi Xiaojing, Jin Ye, Yang Jinjun, Dong Tungalag
keywords：Meat packaging; permeability; permselectivity; plasmaenhanced chemical vapor deposition; poly(L-lactic acid); SiOx
source：期刊
specific source：Polymer-Plastics Technology and Engineering
Issue time：2017年
In this work, poly(L-lactic acid) film was coated with SiOx by the plasma-enhanced chemical vapor
deposition with different deposition times. Compared with the neat poly(L-lactic acid) film, the
oxygen (O2), carbon dioxide (CO2), nitrogen (N2), and water vapor permeability of the poly(L-lactic
acid)/SiOx60 film (depositing for 60 min) decreased by 40.7, 30.6, 58.7, and 53.4% at 25°C,
respectively. After treated by the SiOx deposition, the gas permselectivity of the poly(L-lactic acid)/
SiOx60 film, such as ?(CO2/O2), ?(O2/N2), and ?(CO2/N2), increased by 17.2, 43.9, and 67.5% at 25°C,
respectively. In addition, Young’s modulus and tensile strength of poly(L-lactic acid)/SiOx60 film
increased by 107.2 and 49.3%, respectively. Moreover, the poly(L-lactic acid)/SiOx60 films still kept
good toughness with an elongation at break of 50.7%.