School of Chemistry and Chemical EngineeringState Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China.
Henan Agricultural University, No. 63 Agricultural Road, Zhengzhou, Henan, 450002, P. R. China.
Macromol Rapid Commun. 2020 May;41(10):e2000055. doi: 10.1002/marc.202000055. Epub 2020 Apr 16.
Marine mussels have the ability to cling to various surfaces at wet or underwater conditions, which inspires the research of catechol-functionalized polymers (CFPs) to develop high-performance adhesive materials. However, these polymeric adhesives generally face the problems of complex synthetic route, and it is still high challenging to prepare CFPs with excellent adhesive performance both at dry and underwater conditions. Herein, a mussel-inspired alternating copolymer, poly(dopamine-alt-2,2-bis(4-glycidyloxyphenyl)propane) (P(DA-a-BGOP)), is synthesized in one step by using commercially available monomers through epoxy-amino click chemistry. The incorporation of polar groups and rigid bisphenol A structures into the polymer backbone enhances the cohesion energy of polymer matrix. The alternating polymer structure endows the polymers with high catechol content and controlled polymer sequence. As a result, P(DA-a-BGOP) exhibits a strong bonding strength as high as 16.39 ± 2.13 MPa on stainless steel substrates after a hot pressing procedure and displays a bonding strength of 1.05 ± 0.05 MPa on glass substrates at an under-seawater condition, which surpasses most commercial adhesives.
海洋贻贝具有在潮湿或水下环境中附着在各种表面的能力，这启发了研究儿茶酚功能化聚合物 (CFPs) 以开发高性能的粘合材料。然而，这些聚合粘合剂通常面临着合成路线复杂的问题，并且仍然具有挑战性，难以制备在干燥和水下条件下都具有优异粘合性能的 CFPs。在此，通过使用商业可得的单体通过环氧-氨基点击化学，一步合成了一种受贻贝启发的交替共聚物，聚（多巴胺-交替-2,2-双（4-缩水甘油氧苯基）丙烷）（P(DA-a-BGOP)）。将极性基团和刚性双酚 A 结构引入聚合物主链中，增强了聚合物基质的内聚能。交替聚合物结构赋予聚合物高儿茶酚含量和受控的聚合物序列。结果，P(DA-a-BGOP)在经过热压处理后，在不锈钢基材上表现出高达 16.39 ± 2.13 MPa 的强结合强度，并且在水下条件下在玻璃基材上的结合强度为 1.05 ± 0.05 MPa，超过了大多数商业粘合剂。
