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Effects on Surface and Physicochemical Properties of Dielectric Barrier Discharge Plasma‐Treated Whey Protein Concentrate/Wheat Cross‐Linked Starch Composite Film
Author(s) -
Song Jingxin,
Jiang Bingxue,
Wu Yuanyuan,
Chen Shanshan,
Li Shuai,
Sun Huimin,
Li Xinxin
Publication year - 2019
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/1750-3841.14387
Subject(s) - dielectric barrier discharge , contact angle , materials science , chemical engineering , composite number , starch , surface roughness , ultimate tensile strength , x ray photoelectron spectroscopy , fourier transform infrared spectroscopy , wetting , thermal stability , composite material , dielectric , chemistry , organic chemistry , optoelectronics , engineering
Dielectric barrier discharge (DBD) plasma is a new type of polymer surface modification technology. This study is mainly about the changes in film surface structure and physicochemical properties of whey protein concentrate (WPC)/wheat cross‐linked starch (WCS) composite films after DBD plasma treatment with different plasma parameters. The results show that the proper plasma treatment parameters (400 W to 60 s) can increase the surface roughness, tensile strength, barrier properties, and thermal stability of the edible film and decrease elongation at break and the water contact angle. X‐ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and X‐ray diffraction showed that DBD plasma treatment could increase the content of oxygen‐containing groups on the WPC/WCS film surfaces instead of damaging the internal crystal structure. The results showed that use of proper DBD plasma treatment technology has a positive effect on the mechanical and barrier properties and thermal stability of WPC/WCS films. Practical Application DBD plasma treatment can improve the mechanical, barrier, and thermal properties of WPC/WCS films without generating any pollution. The DBD plasma can be potentially applied in the enhancement of edible film properties. WPC/WCS films are more environmentally friendly than plastics and can be a replacement for traditional plastics.