Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (7): 1477.doi: 10.7503/cjcu20200060

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High-performance Adhesive Material at Dry and Under-seawater Conditions Based on Catechol-functionalized Alternating Copolymer

SHA Xinyi,ZHANG Changxu,WANG Yuling*(),ZHOU Yongfeng*()   

  1. School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2020-02-05 Online:2020-07-10 Published:2020-03-09
  • Contact: Yuling WANG,Yongfeng ZHOU E-mail:wyl2005@sjtu.edu.cn;yfzhou@sjtu.edu.cn
  • Supported by:
    † National Natural Science Foundation of China(51773115)

Abstract:

A novel catechol-functionalized alternating copolymer, poly(dopamine-alt-bisphenol A epoxy resin)[P(DA-a-BAER)], was synthesized from the copolymerization between dopamine(DA) and bisphenol A epoxy resin(BAER) monomers via an epoxy-amino click reaction. The resultant alternating copolymer was used as an adhesive material, of which the bonding performances both at dry and under-seawater conditions were investigated with the usage of FeCl3 as cross-linker. The results showed that P(DA-a-BAER) could achieve excellent bonding strength on various substrates both at dry and under-seawater conditions. Taking stainless steel as an example, a bonding strength of (3.03±0.68) MPa was achieved at atmospheric situation with a 1:3 molar ratio of Fe3+ to catechol groups; an under-seawater bonding strength of (0.65±0.10) MPa was achieved when the molar ratio of Fe3+ to catechol groups reached 1:6. The crosslinking mechanism of Fe3+ was studied by Raman spectrometry and UV-Vis absorption spectrometry, demonstrating that catechol moieties underwent oxidation crosslinking and coordination crosslinking processes. As a result, the cohesion strength of the polymer was enhanced, leading to a high bonding strength.

Key words: Mussel, Bioadhesive, Catechol, Bisphenol A

CLC Number: 

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