高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (7): 1477-1483.doi: 10.7503/cjcu20200060

• 庆祝《高等学校化学学报》复刊40周年专栏 • 上一篇    下一篇

基于儿茶酚交替共聚物的干湿态双高效胶黏剂材料

沙心易,张常旭,汪羽翎*(),周永丰*()   

  1. 上海交通大学化学化工学院, 金属基复合材料国家重点实验室, 上海 200240
  • 收稿日期:2020-02-05 出版日期:2020-07-10 发布日期:2020-03-09
  • 通讯作者: 汪羽翎,周永丰 E-mail:wyl2005@sjtu.edu.cn;yfzhou@sjtu.edu.cn
  • 基金资助:
    国家自然科学基金(51773115)

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)

摘要:

以多巴胺(DA)和双酚A型环氧树脂(BAER)进行氨基-环氧点击化学反应, 合成了儿茶酚功能化交替共聚物聚(多巴胺-alt-双酚A型环氧)[P(DA-a-BAER)]. 以FeCl3为交联剂, 研究了交联剂用量对聚合物在干态及水下环境中黏接性能的影响. 结果表明, 该聚合物可以在干态及水下环境中对多种基材进行黏接. 以不锈钢基材为例, 在干态条件下, 当Fe3+与儿茶酚基团的摩尔比为1:3 时, 黏接强度最高, 为(3.03±0.68) MPa; 在水下环境中, 当Fe3+与儿茶酚基团的摩尔比为1:6 时, 黏接强度最高, 为(0.65±0.10) MPa. 拉曼光谱(Raman)和紫外-可见光吸收光谱(UV-Vis)分析结果表明, Fe3+与儿茶酚基团可通过配位交联和氧化交联的方式增大胶体强度, 从而提高黏接强度.

关键词: 贻贝, 仿生黏合剂, 儿茶酚, 双酚A

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

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