Alkali Lignin and Alkali Combined Ozone-Treated Lignin for Sustainable Food Packaging Applications

Authors : Ece SÖĞÜT, Atıf Can SEYDİM

Pages : 275-285

Doi:10.15671/hjbc.1033151

View : 14 | Download : 5

Publication Date : 2022-08-01

Article Type : Research Paper

Abstract :This study aimed to utilize the lignin-based structures extracted from chestnut shells, an agricultural waste, in chitosan insert ignore into journalissuearticles values(CH); films. In addition, black liquor was treated with ozone to obtain more homogeneous and compatible lignin fractions. Lignin was isolated from chestnut shells by alkali treatment insert ignore into journalissuearticles values(8% NaOH, 120°C/15 min);, then sulfuric acid precipitation insert ignore into journalissuearticles values(0.5M); and drying. Black liquor obtained after an alkali treatment was further treated with ozone at ambient conditions to gain alkali combined ozone-treated lignin insert ignore into journalissuearticles values(OL);. L and OL were added to CH film-forming solutions to fabricate CH-L and CH-OL films and films were characterized by barrier against water insert ignore into journalissuearticles values(WVP);, morphologic, thermal properties, optical and antioxidant properties. Fourier transform infrared insert ignore into journalissuearticles values(FTIR); data confirmed that the isolated L and OL had different structures, and the films indicated a potential interaction between lignin-based structures and CH matrices. Moreover, incorporating L and OL into the CH films increased the opacity and antioxidant activity of films. The addition of lignin-based structures caused a plasticizing effect on the CH films, corresponding with the tensile and thermal properties. The WVP of CH was not significantly influenced upon the addition of lignin-based structures.
Keywords : Lignin, Ozonated Lignin, Chitosan, Antioxidant