Re-Assemblable, Recyclable, and Self-Healing Epoxy Resin Adhesive Based on Dynamic Boronic Esters

Author:

Liu Zhiyong123ORCID,Song Zhiguo1,Lv Benrong1,Qiu Zumin12

Affiliation:

1. Huzhou Guoneng New Material Co., Ltd., Huzhou 313000, China

2. School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China

3. Department of Polymer Materials and Engineering, School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China

Abstract

Thermosetting adhesives are commonly utilized in various applications. However, covalent cross-linked networks prevent thermosetting adhesives from being re-assembled, which necessitates higher machining precision. Additionally, the primary raw materials used in adhesive preparation are derived from non-renewable petroleum resources, which further constrain adhesive development. In this study, a recyclable adhesive was developed by incorporating dynamic boronic esters into epoxy resin derived from soybean oil. The successful synthesis of epoxidized soybean oil and boronic esters was confirmed through the analysis of proton nuclear magnetic resonance spectra and differential scanning calorimetry results. Swelling tests and tensile curves demonstrated the presence of covalently cross-linked networks. Self-healing and reprocessing experiments indicated that the cross-linked network topology could be re-assembled under mild conditions.

Funder

Natural Science Foundation of Anhui Province

Scientific Research Project of Anhui Polytechnic University

Talent Research Start-up Fund of Anhui Polytechnic University

Publisher

MDPI AG

Subject

Polymers and Plastics,General Chemistry

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