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Humid Bonding with a Water‐Soluble Adhesive Inspired by Mussels and Sandcastle Worms
Author(s) -
Li Ailei,
Jia Mingchen,
Mu Youbing,
Jiang Wei,
Wan Xiaobo
Publication year - 2015
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201400513
Subject(s) - catechol , adhesive , phosphoric acid , chemistry , molar ratio , adhesion , polymer chemistry , grafting , nuclear chemistry , organic chemistry , layer (electronics) , polymer , catalysis
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 1 H and 31 P NMR spectroscopy and size‐exclusive chromatography. The influence of the content ratio of catechol and different phosphoric acid groups and the Fe 3+ ions as the crosslinker on the outcome of the adhesive properties is investigated. When the molar ratio of Fe 3+ to catechol and PO 4 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 Fe 3+ interacts not only with the catechol, but also with the bis‐phosphoric acid groups, which accounts for its performance in humid conditions.