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- Title
Eco-friendly starch-based hydrogels with improved adhesion, antioxidant, and antimicrobial properties as wood adhesives.
- Authors
Jeong, Yu Jin; Chathuranga, Kiramage; Lee, Jong Soo; Park, Won Ho
- Abstract
Adhesives derived from natural biomass, such as starch, cellulose, and plant protein, are attracting attention as alternatives to harmful formaldehyde-based adhesives in the wood adhesive industry. However, biomass-based adhesives have remarkably poor adhesion properties and are easily eroded by bacteria and fungi, which limit their application as adhesives. Therefore, various environmentally friendly adhesives with good adhesive force and antibacterial activity are being explored. In this study, an eco-friendly composite hydrogel with improved adhesive properties was prepared by simply blending starch, a polymeric carbohydrate, with tannic acid, a polyphenol with a large number of catechol and gallol groups. The effect of tannic acid on the recrystallization process of the starch/tannic acid composite hydrogel was investigated through X-ray diffraction, rheological and mechanical studies. As compared with the starch hydrogel, the composite starch/tannic acid hydrogel exhibited improved thermal stability and adhesive strength on various substrates. In particular, its adhesive strength on a wood substrate was significantly enhanced owing to the high adhesive force between tannic acid in the hydrogel and wood substrate. In addition, the composite hydrogel also had antioxidant and antibacterial properties owing to the polyphenolic groups of tannic acid. Thus, the functional starch/tannic acid composite hydrogel has great prospects as an eco-friendly wood adhesive.
- Subjects
TANNINS; WOOD; ADHESIVES; HYDROGELS; PLANT proteins; STARCH; ADHESIVES industry; RECRYSTALLIZATION (Metallurgy)
- Publication
Cellulose, 2023, Vol 30, Issue 12, p7905
- ISSN
0969-0239
- Publication type
Article
- DOI
10.1007/s10570-023-05340-3