Jump to main content
Jump to site search


Self-Healing Flexible Urea-g-MWCNTs/Poly(urethane-sulfide) Nanocomposite for Sealing Electronic Devices

Abstract

With the development of flexible electronic devices, strict requirements for sealing these electronics were put forward to. Developing flexible sealant for next generation of flexible electronic devices is essential so as to enable a broad range of application. Herein, we demonstrate a facile way to prepared self-healing flexible urea-grafted mult-walled carbon nanotubes/poly(urethane-sulfide) nanocomposite with robust mechanical strength, flexibility and high self-healing efficiency. On the one hand, urea-grafted mult-walled carbon nanotubes (urea-g-MWCNTs) are used as physical cross-linking agent, which will improve the mechanical strength and self-healing property of the urea-g-MWCNTs/poly(urethane-sulfide) (U-MWC-PUS) nanocomposite. On the other hand, urea-g-MWCNTs are used as a photothermal switch, which will absorb near-infrared (NIR) irradiation and convert it into thermal energy for local self-healing. Owing to the [2+1] radical-mediated disulfide exchange reaction and hydrogen bonding interactions in U-MWC-PUS nanocomposite, the covalent polymer networks can rearrange under thermal stimulation, which make the U-MWC-PUS nanocomposite have self-healing property. When the cracked U-MWC-PUS nanocomposite is kept at the proper temperature or treated with NIR irradiation, it can recover more than 90% of the original tensile strength. Furthermore, self-healing flexible U-MWC-PUS nanocomposite exhibits excellent adhesion and sealability even under water. At the same time, the self-healing mechanism of flexible U-MWC-PUS nanocomposite was analyzed. Our study will provide a facile way to fabricate self-healing flexible U-MWC-PUS nanocomposite for sealing electronic devices.

Back to tab navigation

Supplementary files

Publication details

The article was received on 25 Sep 2019, accepted on 19 Nov 2019 and first published on 22 Nov 2019


Article type: Paper
DOI: 10.1039/C9TC05255K
J. Mater. Chem. C, 2019, Accepted Manuscript

  •   Request permissions

    Self-Healing Flexible Urea-g-MWCNTs/Poly(urethane-sulfide) Nanocomposite for Sealing Electronic Devices

    Q. Yan , Q. Fu, J. Hu and H. Fu, J. Mater. Chem. C, 2019, Accepted Manuscript , DOI: 10.1039/C9TC05255K

Search articles by author

Spotlight

Advertisements