Cooperative self-healing performance of shape memory polyurethane and Alodine-containing microcapsules

被引：32

作者：

Fan, Weijie ^{[1
,2
]}

Li, Weihua ^{[1
]}

Zhang, Yong ^{[3
]}

Wang, Wei ^{[1
]}

Zhang, Xiaoying ^{[1
]}

Song, Liying ^{[1
]}

Liu, Xiaojie ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Naval Aeronaut Univ, Qingdao Branch, Qingdao 266041, Peoples R China

来源：

RSC ADVANCES | 2017年 / 7卷 / 74期

基金：

中国国家自然科学基金;

关键词：

ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; CORROSION PROTECTION; SCRATCH BEHAVIOR; COATINGS; COMPOSITE; ALUMINUM; ADHESION; ALLOY; FILM; RESISTANCE;

D O I：

10.1039/c7ra09017j

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

In this study, a method to prepare self-healing coatings by incorporating Alodine-containing microcapsules as fillers in Shape Memory Polyurethane (SMPU) was presented. Toluene diisocyanate (TDI) prepolymer was prepared for the microcapsule shells, while a healing agent (Alodine 5200) was selected for the core. SMPU with polyethylene glycol (PEG) as the soft segments and isophorone diisocyanate (IPDI) and 2,2-hydroxymethyl butyric acid (DMBA) as the hard segments were synthesized as main film-formers. A set of techniques including Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), electrochemical impedance spectroscopy (EIS), Scanning Kelvin Probe (SKP), and optical microscopy were used to completely characterize their self-healing performance on Al 7B04 T74 aluminum alloy surfaces. The study on the self-healing mechanism indicated that the self-healing process can be divided into two stages, and there was enormous potential for repairing large cracks with this technique.

引用

页码：46767 / 46776

页数：10

共 35 条

[1]

Preparation of chromate-free, self-healing polymer films containing sodium silicate on zinc pretreated in a cerium(III) nitrate solution for preventing zinc corrosion at scratches in 0.5 M NaCl [J].