Synthesis of ruthenium catalysts functionalized graphene oxide for self-healing applications

被引：30

作者：

Mariconda, Annaluisa ^{[1
]}

Longo, Pasquale ^{[1
]}

Agovino, Anna ^{[1
]}

Guadagno, Liberata ^{[2
]}

Sorrentino, Andrea ^{[3
]}

Raimondo, Marialuigia ^{[2
]}

机构：

[1] Univ Salerno, Dept Biol & Chem, I-84084 Fisciano, SA, Italy

[2] Univ Salerno, Dept Ind Engn, I-84084 Fisciano, SA, Italy

[3] CNR, IPCB, I-80055 Portici, NA, Italy

来源：

POLYMER | 2015年 / 69卷

关键词：

Self-healing; Graphene-oxide; Grubbs-catalysts; BARRIER PROPERTIES; POLYMERS;

D O I：

10.1016/j.polymer.2015.04.048

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Graphene Oxide (GO) was prepared by chemical oxidation of high surface area graphite (G). GO was used to support ruthenium catalysts with the aim to activate self-healing reactions in multifunctional materials able to integrate simultaneously the healing reactions with the very interesting properties of graphene-based materials. Grubbs catalysts 1st (G1) and 2nd generation modified (G2(o-tol)), Hoveyda-Grubbs catalysts 1st (HG1) and 2nd generation (HG2) were covalently bonded to GO preserving the same catalytic activity of the catalysts not bonded to the graphene sheets. GO-G2(o-tol) and GO-G1 deactivate during the process of preparation of the self-healing epoxy mixtures at 90 degrees C. Evidence of the self-healing activity of the various catalytic complexes was investigated for both uncured and cured samples. Results show that GO-HG1 and GO-HG2 are not deactivated and hence they are able to trigger self-healing reaction based on the ROMP of 5-ethylidene-2-norbornene (ENB). This behavior is most likely due to the formation of 16 electron Ru-complexes that are more stable than the 14 electron complexes of GO-G1 and GO-G2 catalysts. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：330 / 342

页数：13

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