Bioinspired design by gecko structure and mussel chemistry for bio-based adhesive system through incorporating natural fibers. (1st November 2019)

• Record Type: Journal Article
• Authors: Liu, Xiaorong; Wang, Kaili; Gao, Qiang; Zhang, Wei; Zhou, Wenrui; Shi, Sheldon Q.; Xia, Changlei; Li, Jianzhang
• Is Part Of: Journal of cleaner production. Volume 236(2019)
• Publication Date: 2019-11-01
• Subjects: Bioinspired design -- Soybean meal adhesive -- Kenaf fiber -- Gecko -- Mussel -- Adhesion strength; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2019.07.066
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: The development of eco-friendly, non-formaldehyde, and high-performance bio-based adhesives is a great strategy for relieving environmental pressure and health concern, especially for the wood adhesive industry. In this work, a green soybean meal (SM)-based adhesive with excellent performance was developed by embedding modified kenaf fibers (KF). The synergistic bionic design with gecko structure and mussel chemistry endowed KF with improved rough surface and increased reactive sites, resulting in robust mechanical interlocking and multiple chemical crosslinking ability for SM-based adhesive. The resultant adhesive exhibited excellent bonding properties, compared to the SM adhesive, the wet shear strength was improved from 0.41 MPa to 1.52 MPa, and the moisture absorption was decreased from 10.1% to 8.6%. These results met the standard of type II plywood (≥0.7 MPa) according to the national standard of China (GB/T 9846.3-2004). This eco-friendly SM-based adhesive opens a new way to replace harmful formaldehyde-based adhesives and contributes to the development and use of agricultural and forestry byproducts for practical application. Graphical abstract: Image 1 Highlights: Biomimetic bio-based soybean adhesive was prepared via a facile method. Kenaf fiber was functionalized with a modified Stöber technique (SSKF). SSKF serves as multi-functional network skeleton. Tannic acid (TA) acts as a "bridge" between the SM matrix and SSKF. Adhesive strength and thermal stability of the resulting adhesive are improved.