期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 35, 页码 32414-32422出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b11385
关键词
cellulose nanocrystals; polyurethane; co-deposition; core-shell nanohybrid elastomer; soy protein adhesive
资金
- Fundamental Research Funds for the Central Universities [2016ZCQ01, 2019YC14]
- National Forestry Public Welfare Industry Major Projects of Scientific Research [201504502]
- Projects of National University Top-ranking Discipline Construction [450-GK111902021]
Exploitation of a versatile strategy for fabricating a plant protein adhesive with outstanding adhesion and water resistance is a growing concern in the ecofriendly wood industry. Herein, a core-shell nanohybrid elastomer composed of the cellulose nanocrystal (CNC) core and elastic polyurethane shell is prepared via a co-deposition strategy and then used as an efficient reinforcer to improve the performances of soy protein (SP) adhesive. It is found that the core-shell nanohybrid acts as a multiple cross-linker, giving rise to the construction of a stable protein adhesive system. Moreover, owing to the nanohybrid design combining strong yet tough qualities, the hard CNC serves to repair the discontinuous protein adhesion layer for a rigid and integrated system, while the elastic polyurethane contributes to energy dissipation, thus endowing the protein adhesive with excellent overall cohesive strength. Given such synergistic effects, the modified SP-based adhesive exhibits a significant improvement in both adhesion and water resistance, particularly achieving a 311.8% increase in wet adhesion strength compared to that of the pristine SP adhesive. This work may provide an effective guide for the preparation and practical application of high-performance plant-protein-based adhesive.
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