Nucleophilic amino acids as a renewable alternative to petrochemically-derived amines in glycerol epoxy resins

Yunyi Liang; Yonghong Luo; Yingji Wu; Xiaona Li; Quyet Van Le; Jianzhang Li; Changlei Xia

Journal of Bioresources and Bioproducts (May 2024)

Nucleophilic amino acids as a renewable alternative to petrochemically-derived amines in glycerol epoxy resins

Yunyi Liang,
Yonghong Luo,
Yingji Wu,
Xiaona Li,
Quyet Van Le,
Jianzhang Li,
Changlei Xia

Affiliations

Yunyi Liang: Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
Yonghong Luo: Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
Yingji Wu: Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
Xiaona Li: Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
Quyet Van Le: Department of Materials Science and Engineering, Institute of Green Manufacturing Technology, Korea University, Seoul 02841, South Korea
Jianzhang Li: Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
Changlei Xia: Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; Corresponding author.

Journal volume & issue: Vol. 9, no. 2
pp. 222 – 232

Abstract

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The standard epoxy resin curing agents revealed are from unsustainable petroleum-based sources, which produce poisonous exhaust when cured. Amino acids, a bio-based epoxy curing agent with amino and carboxyl groups, are another potential curing agent. Water-soluble epoxy resins cured with lysine (Lys), glutamic acid (Glu), leucine (Leu), and serine (Ser) as amino acids were investigated. The results showed that the water-soluble epoxy resin (glycerol epoxy resins, GER) was cured with Lys and Glu after reacting. Fourier transform infrared (FT-IR) spectroscopic analysis of the GER-Lys showed that the amino and carboxyl groups of Lys primarily reacted with the epoxy groups of GER. The elongation at break of Lys-cured GER (GER-Lys) cured at 70 ℃ with a molar ratio of 1꞉0.75 was 75.32%. The fact that elongations at break of GER-Lys (79.43%) were higher than those of GER-Glu (17.33%), respectively supports the decrease of crosslinking density by the amino acid-cured GER reaction. The potential of Lys and Glu alternatives for petrochemical amines is demonstrated and provides promising opportunities for industrial application.

Published in Journal of Bioresources and Bioproducts

ISSN: 2369-9698 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Science: Chemistry: Organic chemistry: Biochemistry
Website: https://www.keaipublishing.com/en/journals/journal-of-bioresources-and-bioproducts/

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