A Tough and Efficient Self-Healing Supramolecular Materials modulated with WCNT-NH2

Self-healing polymers crosslinked by solely reversible bonds are intrinsically weaker than common covalently crosslinked networks. In this work, a self-healing materials with excellent mechanical properties was synthesized by a new design strategy, wich is to introduce covalent into reversible netwo...

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Bibliographic Details
Main Authors: Ma, H R, Li, Y X, Jiang, C, Yao, Y W, Yao, C
Format: Conference Proceeding
Language:English
Subjects:
Bonding strength
Carbon nanotubes
Composite materials
Crosslinking
Mechanical properties
Oligomers
Room temperature
Self healing materials
Synthesis
Tensile strength
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Summary:Self-healing polymers crosslinked by solely reversible bonds are intrinsically weaker than common covalently crosslinked networks. In this work, a self-healing materials with excellent mechanical properties was synthesized by a new design strategy, wich is to introduce covalent into reversible networks to improve its mechanical properties. First, polyamidoamine dendrimer oligomers (PAMAM-Oligomers) was synthesized. Then amine functionalized carbon nanotubes (WCNT-NH2) reacted with PAMAM-Oligomers to form a polyamidoamine carbon nanotubes composite materials (PAMAM-WCNT-NH2). The synthesized materials behave as rubber and exhibit spontaneous self-healing behaviour at room temperature without external stimuli. The mechanical and self-healing properties are closely related to the content of WCNT-NH2. For 0.5wt% WCNT-NH2 in the materials, the strain of the material is 330% and tensile strength is 0.6 MPa. Importantly it can improve the self-healing efficiency to 98% of its original tensile strength in 2h.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/544/1/012014