首页|海水中基于中空纳米填料的光热自修复聚氨酯涂层

海水中基于中空纳米填料的光热自修复聚氨酯涂层

扫码查看
原文链接
  • 万方数据
本文开发了一种由光热响应型中空核-壳纳米填料激活的具有优异自修复和耐腐蚀性能的新型复合涂层.首先,合成具有中空核-壳结构的光热纳米填料Co9S8@Bi2S3,然后,将其添加到聚氨酯(PU)中制备PU-Co9S8@Bi2S3复合涂层.在808 nm近红外光照射下,Co9S8@Bi2S3的光热效应可以触发可逆氢键的重建来修复涂层划痕.通过划痕试验和分子动力学模拟证明了 PU-Co9S8@Bi2S3涂层优异的光热自修复性能.电化学阻抗谱测试结果表明,PU-Co9S8@Bi2S3涂层具有良好的自修复和防腐性能.经历3次自修复后的涂层,在海水中浸泡30 d后的低频阻抗模量仍然接近109 Ω·cm2.该研究为开发由光热效应触发的多重循环自修复涂层提供了一种新的策略.
Photothermal self-healing polyurethane coating based on hollow nanofillers in seawater
Herein,a novel composite coating with excellent self-healing and corrosion resistance activated by photothermal responsive hollow core-shell nanofillers was developed.A photothermal nanofiller(Co9S8@Bi2S3)with a hollow core-shell structure was synthesized and then added to polyurethane(PU)to prepare PU-Co9S8@Bi2S3 composite coating.Applying 808 nm near-infrared irradiation induces a photothermal effect in Co9S8@Bi2S3,which subsequently initiates the reconstruction of reversible hydrogen bonds,facilitating the self-healing of coating scratches.The excellent photothermal self-healing performance of PU-Co9S8@Bi2S3 coating was demonstrated by scratch tests and molecular dynamics simulations.The electrochemical impedance spectroscopy test results showed that the PU-Co9S8@Bi2S3 coating has good self-healing and anti-corrosion properties.The low-frequency impedance modulus of the coating after three self-healing sessions was still close to 109 Ω·cm2 after 30 d of immersion in seawater.This study provides a new strategy for developing multi-cycle self-healing coatings triggered by photothermal effects.

polyurethane coatingphotothermal effectself-healingcorrosion protection

康倩倩、毛智鹏、彭黎明、MYRONYUK Oleksiy、李伟华、王巍

展开 >

School of Materials Science and Engineering,Ocean University of China,Qingdao 266100,China

Hubei Keying New Materials Technology Co.,Ltd.,Zhongxiang 431900,China

Department of Chemical Technology of Composite Materials,National Technical University of Ukraine"Kyiv Polytechnic Institute",Kyiv 03056,Ukraine

Institute of Chemistry,Henan Academy of Sciences,Zhengzhou 450046,China

North China University of Water Resources and Electric Power,Zhengzhou 450046,China

展开 >

聚氨酯涂层 光热效应 自修复 腐蚀防护

2024

10.1007/s11771-024-5765-6

中南大学学报(英文版)
中南大学

中南大学学报(英文版)

CSTPCDEI
影响因子：0.47
ISSN：2095-2899
年,卷(期)：2024.31(10)