Evaluation of adhesion properties of lignin-epoxy adhesives in structural wood applications for automotive components. (October 2020)

• Record Type: Journal Article
• Authors: Aniol, A; Grosse, T; Fischer, F; Böhm, S
• Other Names: da Silva Lucas F. M. guest-editor.
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 234:Number 5(2020)
• Page Start: 511
• Page End: 519
• Publication Date: 2020-10
• Subjects: Lignin -- adhesive -- automotive -- biobased -- thermogravimetric analysis–Fourier-transform infrared -- scanning electron microscopy -- epoxy; Mechanical engineering -- Periodicals; Production engineering -- Periodicals; Manufacturing processes -- Periodicals; 621.05
• DOI: 10.1177/0954408920907407
• Languages: English
• ISSNs: 0954-4089

Abstract

The use of sustainable hybrid components is an important topic in lightweight automotive applications. Wood being a renewable material, when used in combination with other materials such as technical polymers, offers a high potential for producing hybrid components and the implementation of innovative lightweight automotive materials. The feasibility of wood-based hybrid automotive components strongly depends on the properties of the interface between wood, lignin as a renewable coupling agent, and technical polymers. This paper investigates the macromolecular reactions and the bonding area in biobased epoxy adhesives for a specific influence on the performance of structural automotive wood components. Therefore, a typical bisphenol A diglycidyl ether epoxy adhesive was modified with lignosulphonate to increase the penetration depth. The composites were characterized by thermogravimetric analysis coupled with Fourier-transform infrared spectroscopy to validate the crosslinking of the macromolecules and the thermal stability of the adhesive. In the next step, a layer-by-layer composite was built up with the biobased adhesive and 1 mm beech veneer. The bonding area was characterized by scanning electron microscopy and compression tests.