Preparation of a Strong, Mildew-Resistant, and Flame-Retardant Biomimetic Multifunctional Soy Protein Adhesive Via the Construction of an Organic-Inorganic Hybrid Multiple-Bonding Structure
It is important but challenging to develop multifunctional soy protein adhesives with high bonding strength to replace toxic formaldehyde-based adhesives used in the wood-based panel fabrication industry. In this study, inspired by arthropod cuticles, the epoxide-crosslinked soy protein isolate (SPI) was used to form a covalently-bonded network, and dopamine-functionalized waste paper fiber (WPF-PDA) was synthesized as the catechol groups donor to form a hydrogen bond network and physically-enhancement, copper hydroxide was used as an inorganic material that chelated with the catechol groups of WPF-PDA and SPI to form an ionic bond network. This formed an organic-inorganic hybrid structure in the soy protein adhesive. The results showed that the dry/wet shear strength of the plywood prepared by the SPI/TGA/WPF-PDA/Cu(OH) 2 adhesive increased by 46.0% and 144% to 2.0 MPa and 1.22 MPa, respectively, compared with SPI adhesive. The fracture toughness increased by 145%, and the residual rate of the adhesive increased by 18.6%, indicating that the bonding strength, toughness, and water resistance of the adhesive were significantly improved. In addition, the anti-mildew time of the adhesive increased from 1 d to more than 40 d, while the maximum heat release rate and total heat release decreased by 32.5% and 5.8%, respectively, indicating that the flame retardancy was enhanced. This strategy provides a potential method to develop other high-performance and multifunctional bio-adhesives, composites, and hydrogels
Year of publication: |
[2022]
|
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Authors: | Xu, Yantao ; Han, Yufei ; Li, Yue ; Li, Jingchao ; Li, Jianzhang ; Gao, Qiang |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
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