Mechanically durable antibacterial nanocoatings based on zwitterionic copolymers containing dopamine segments  

作　　者：Jingzhi Yang Hongchang Qian Junpeng Wang Pengfei Ju Yuntian Lou Guoliang Li Dawei Zhang 

机构地区：[1]Beijing Advanced Innovation Center for Materials Genome Engineering,Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China [2]Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China [3]Shanghai Aerospace Equipment Manufacturer,Shanghai 200245,China [4]BRI Southeast Asia Network for Corrosion and Protection,Shunde Graduate School of University of Science and Technology Beijing,Foshan 528000,China

出　　处：《Journal of Materials Science & Technology》2021年第30期233-241,共9页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51771029 and 51771122);the Shanghai International Science and Technology Cooperation Project(No.17520731800);the China Postdoctoral Science Foundation(No.2019M660453)。

摘　　要：Developing an effective and durable antibacterial surface is important for surgical tools and biomedical implants.In this work,a zwitterionic copolymer containing catechol groups as biomimetic anchoring segments was coated onto 316 L stainless steel via drop-casting.Energy-dispersive X-ray spectroscopy(EDS)and water contact angle(WCA)measurements indicated that the coatings made of the copolymers containing zwitterionic and dopamine segments at the molar ratios of 8:2 and 6:4 exhibited stronger stability and mechanical durability than the one at 9:1 after inducing tape-peeling and ultrasonication damage.The mechanically durable nanocoatings exhibited excellent antibacterial performance against Staphylococcus aureus and Escherichia coli in a period of 3 days.The nanocoatings with zwitterionic and dopamine segments at the molar ratio of 8:2 were further evaluated and demonstrated durable antibacterial performance after tape-peeling and ultrasonication treatments.

关 键 词：Antibacterial surface ZWITTERIONIC Polymers Coatings 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TB383.1[金属学及工艺—金属学]