Amino acids as latent curing agents and their application in fully bio-based epoxy resins. Issue 17 (10th August 2021)

• Record Type: Journal Article
• Authors: Yu, Zhen; Ma, Songqi; Tang, Zhaobin; Liu, Yanlin; Xu, Xiwei; Li, Qiong; Zhang, Kewei; Wang, Binbo; Wang, Sheng; Zhu, Jin
• Is Part Of: Green chemistry. Volume 23:Issue 17(2021)
• Page Start: 6566
• Page End: 6575
• Publication Date: 2021-08-10
• Subjects: Environmental chemistry -- Industrial applications -- Periodicals; Environmental management -- Periodicals; 660
• DOI: 10.1039/d1gc02126e
• Languages: English
• ISSNs: 1463-9262

Abstract

Abstract : Amino acids were exploited as a new type of latent curing agent and utilized to achieve bio-based one-component epoxy resins. Abstract : Latent curing agents are significantly important to develop one-component epoxy resins. However, the reported latent curing agents are from unsustainable fossil resources. Herein, a new type of latent curing agent—amino acids—was developed from bioresources. Amino acids can be naturally occurring and can also be synthesized from bio-based compounds. The latent curing feature and mechanism were revealed through investigation of curing kinetics and small-molecule model curing reaction. A bio-based amino acid containing amide bond (PDA-MAH) was synthesized from 1, 5-pentanediamine and maleic anhydride, and used together with a bio-based epoxy monomer from itaconic acid (EIA) to achieve a fully bio-based one-component epoxy system. The obtained epoxy network exhibited significantly enhanced glass transition temperature, tensile strength and Young's modulus compared with the control amino acid/EIA system due to the hydrogen bonding from the amide bonds. In addition, the epoxy network exhibited excellent degradability under alkaline conditions.