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Macromol Rapid Commun. 2016 Oct;37(20):1667-1675. doi: 10.1002/marc.201600428. Epub 2016 Aug 29.

A Highly Stretchable and Autonomous Self-Healing Polymer Based on Combination of Pt···Pt and π-π Interactions.

Author information

1
State Key laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
2
National Laboratory of Solid State Microstructure, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
3
State Key laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China. chli@nju.edu.cn.
4
State Key laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China. youxz@nju.edu.cn.
5
Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA. zbao@stanford.edu.

Abstract

A new self-healing polymer has been obtained by incorporating a cyclometalated platinum(II) complex Pt(C N N)Cl (C N N = 6-phenyl-2,2'-bipyridyl) into a polydimethylsiloxane (PDMS) backbone. The molecular interactions (a combination of Pt···Pt and π-π interactions) between cyclometalated platinum(II) complexes are strong enough to crosslink the linear PDMS polymer chains into an elastic film. The as prepared polymer can be stretched to over 20 times of its original length. When damaged, the polymer can be healed at room temperature without any healants or external stimuli. Moreover, the self-healing is insensitive to surface aging. This work represents the first example where the attractive metallophilic inter-actions are utilized to design self-healing materials. Moreover, our results suggest that the stretchability and self-healing properties can be obtained simultaneously without any conflict by optimizing the strength of crosslinking interactions.

KEYWORDS:

platinum complexes; polymers; self-healing; stretchable

PMID:
27569252
DOI:
10.1002/marc.201600428
[Indexed for MEDLINE]

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