Volume 216, Issue 4 pp. 450-459
Full Paper

Humid Bonding with a Water-Soluble Adhesive Inspired by Mussels and Sandcastle Worms

Ailei Li

Ailei Li

Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong Province, 266101 PR China

University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049 PR China

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Mingchen Jia

Mingchen Jia

Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong Province, 266101 PR China

University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049 PR China

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Youbing Mu

Corresponding Author

Youbing Mu

Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong Province, 266101 PR China

E-mail: [email protected], [email protected]Search for more papers by this author
Wei Jiang

Wei Jiang

National Engineering Research Center for Organic Pollution Control and Resource Reuse, State Key Laboratory of Pollution and Resource Reuse, School of the Environment, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu Province, 210093 PR China

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Xiaobo Wan

Corresponding Author

Xiaobo Wan

Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong Province, 266101 PR China

E-mail: [email protected], [email protected]Search for more papers by this author
First published: 03 December 2014
Citations: 24

Abstract

Inspired by mussels and sandcastle worms, a water-soluble adhesive is prepared by grafting catechol and phosphoric acid functionalities to the polyoxetane backbone, which achieves improved adhesion in humid environment. The adhesive is characterized by 1H and 31P NMR spectroscopy and size-exclusive chromatography. The influence of the content ratio of catechol and different phosphoric acid groups and the Fe3+ ions as the crosslinker on the outcome of the adhesive properties is investigated. When the molar ratio of Fe3+ to catechol and PO4 is 1/1 and 0.7/1, respectively, the best bonding strength of 0.35 MPa is achieved for the adhesive containing 5 mol% catechol and 26 mol% bis-phosphoric acid groups under humid conditions. It is found out that Fe3+ interacts not only with the catechol, but also with the bis-phosphoric acid groups, which accounts for its performance in humid conditions.

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