Preparation of an Aminated Lignin/Fe(III)/Polyvinyl Alcohol Film: A Packaging Material with UV Resistance and Slow-Release Function
Author:
Gao Shushan1ORCID, Zhu Chonghao1, Ma Liangfei12, Liu Chenghai1, Zhang Hongqiong1, Zhang Shengming123
Affiliation:
1. College of Engineering, Northeast Agricultural University, Harbin 150030, China 2. Key Laboratory of Pig-Breeding Facilities Engineering, Ministry of Agriculture and Rural Affairs, Harbin 150030, China 3. Heilongjiang Province Technology Innovation Center of Mechanization and Materialization of Major Crops Production, Harbin 150030, China
Abstract
To reduce the usage of petroleum-based plastic products, a lignin-based film material named aminated lignin/Fe(III)/PVA was developed. The mixture of 8 g lignin, 12 mL diethylenetriamine, 200 mL NaOH solution (0.4 mol·L−1), and 8 mL formaldehyde was heated at 85 °C for 4 h; after the aminated lignin was impregnated in the Fe(NO3)3 solution, a mixture of 3 g aminated lignin/Fe(III), 7 g PVA, and 200 mL NaOH solution (pH 8) was heated at 85 °C for 60 min; after 2 mL of glycerin was added, the mixture was spread on a glass plate to obtain the aminated lignin/Fe(III)/PVA film. This film demonstrated hydrophobicity, an UV-blocking function, and a good slow-release performance. Due to the formation of hydrogen bonds between the hydroxyl groups of lignin and PVA, the tensile strength, the elongation at break, and the fracture resistance of the film were 9.1%, 107.8%, and 21.9% higher than that of pure PVA film, respectively. The iron content of aminated lignin/Fe(III)/PVA was 1.06 wt%, which mainly existed in a trivalent form. The aminated lignin/Fe(III)/PVA film has the potential to be used as a food packaging material with anti-ultraviolet light function and can also be developed as other packaging materials, such as seedling bowls, pots for transplanting, and coating films during transport.
Funder
Natural Science Foundation of Heilongjiang Province, China Key Research and Development Program of Heilongjiang Province Scientific and Technological Program of the First Division of Xinjiang Production and Construction Corps in Alar City “Academic Backbone” Project of Northeast Agricultural University
Subject
Plant Science,Health Professions (miscellaneous),Health (social science),Microbiology,Food Science
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