Open AccessHighly hydrophilic and stable polylactic acid surface achieved by argon plasma treatment
Author(s) -
A. V. Romashkin,
Yu A Polikarpov,
Nikolay S. Struchkov,
Г. О. Силаков,
В. А. Петухов,
Denis D. Levin,
В. К. Неволин
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1410/1/012071
Subject(s) - polylactic acid , contact angle , surface modification , materials science , x ray photoelectron spectroscopy , tetrahydrofuran , chemical engineering , argon , polymer chemistry , chemistry , organic chemistry , composite material , polymer , solvent , engineering
The effect of modifying additives such as low molecular weight polylactide (PLA) and benzyl alcohol (BA) on the degree of hydrophilicity of high molecular weight PLA before and after plasma treatment with low density and specific power per area was investigated. The lowest water contact angle (WCA) after modification was about 17°. A comparative evaluation of the formed functional groups amount, the hydrophilicity and stability of the plasma modification was carried out. WCA measurements of ageing of modified samples over time up to one year was carried out. It was found that plasma treated PLA films, obtained from tetrahydrofuran solution of high-molecular weight PLA and BA, demonstrated one of the highest ageing stability at high hydrophilicity. At the same time, the increase of the oxygen-containing functional groups amount on the modified PLA surface (about 40%, estimated by XPS) is close to the critical value in point of view of ensuring both high hydrophilicity and stability of the PLA surface after the modification.