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Erschienen in: Cellulose 6/2021

19.02.2021 | Original Research

Soy meal adhesive with high strength and water resistance via carboxymethylated wood fiber-induced crosslinking

verfasst von: Huiwen Pang, Yuyang Wang, Zhiwei Chang, Changlei Xia, Chunrui Han, Hongguang Liu, Jianzhang Li, Shifeng Zhang, Liping Cai, Zhenhua Huang

Erschienen in: Cellulose | Ausgabe 6/2021

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Abstract

Soy meal-based wood adhesive has received much interest for its environmentally friendly properties, as it is thought to provide an effective alternative to conventional formaldehyde-based wood adhesives. However, the abundant hydrophilic groups and weak internal structure result in poor water resistance and low bonding strength of soy meal-based wood adhesives. In this study, bio-based carboxymethylated wood fibers (CMWFs) were used to develop a high-performance soy meal-based adhesive. Wood fibers (WFs) were pre-treated via carboxymethylation to endow WFs with abundant carboxyl groups and facilitate their dispersion in soy protein matrix. CMWFs containing abundant carboxyl groups served as a multiple “crosslinking core” and effectively cross-linked with soy protein side-chain, resulting in the construction of a stable adhesive system. The modified soy meal-based adhesive exhibited excellent bonding strength and water resistance. In particular, tension tests indicated that the water-resistant bonding strength of the adhesive modified with CMWFs reached 1.69 MPa, which was 160% higher compared with the unmodified adhesive; the wood failure percentage of the plywood bonded by CMWF-modified soy meal-based adhesive was as high as 100%. Moisture uptake and residual rate tests indicated that high water resistance of the adhesive was achieved. This design provides a facile and sustainable strategy for developing high-performance soy meal-based adhesives.

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Literatur
Metadaten
Titel
Soy meal adhesive with high strength and water resistance via carboxymethylated wood fiber-induced crosslinking
verfasst von
Huiwen Pang
Yuyang Wang
Zhiwei Chang
Changlei Xia
Chunrui Han
Hongguang Liu
Jianzhang Li
Shifeng Zhang
Liping Cai
Zhenhua Huang
Publikationsdatum
19.02.2021
Verlag
Springer Netherlands
Erschienen in
Cellulose / Ausgabe 6/2021
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-021-03732-x

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