Polyurethane graphene nanocomposites with self-healing properties by azide-alkyne click reaction

被引：13

作者：

Akhan, Seda ^{[1
]}

Oktay, Burcu ^{[1
]}

Ozdemir, Oguz Kaan ^{[2
]}

Madakbas, Seyfullah ^{[1
]}

Apohan, Nilhan Kayaman ^{[1
]}

机构：

[1] Marmara Univ, Dept Chem, TR-34722 Istanbul, Turkey

[2] Yildiz Tech Univ, Dept Met & Mat Engn, TR-34210 Istanbul, Turkey

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2020年 / 254卷 / 254期

关键词：

Nanocomposites; Self-healing; Microcapsule; Azide-alkyne click reaction; Graphene oxide; OXIDE; COATINGS; CYCLOADDITION; MICROCAPSULES; DEGRADATION; INHIBITION; CHEMISTRY; HYDROGELS; CORROSION; ENERGY;

D O I：

10.1016/j.matchemphys.2020.123315

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanocomposites stand out as promising materials in many fields due to their properties such as strength, hardness, thermal stability, and lightness. Introducing self-healing ability to polymer nanocomposites provides new guidelines for strong, sustainable, and durable materials. Microcapsule-based self-healing materials work independently of an external stimulus such as pH, heat, light and solvent. In this paper, we developed autonomously self-healing UV-cured polyurethane graphene oxide nanocomposite coatings by means of efficient and useful copper-catalyzed azide-alkyne (CuAAC) click chemistry. Low molecular weight tetra-arm azide was successfully capsulated within poly(vinyl formal) capsules. Alkyne functional graphene-oxide reinforced nanocomposites containing azide microcapsules were prepared through photo-polymerization. The self-healing ability and anti-corrosion properties of the nanocomposites were studied after the damage occurred. The self-healing experiments show that the microcapsules provided a self-healing efficiency of around 70% after 24 h. Chemical, morphologic, mechanical, and thermal properties of the films were investigated. Furthermore, the electro-chemical analysis of films showed that the microcapsule containing films has a higher polarization resistance and a lower corrosion current.

引用

页数：13