Issue 47, 2016

Self-healing poly(siloxane-urethane) elastomers with remoldability, shape memory and biocompatibility

Abstract

Thermally healable poly(siloxane-urethane) elastomers (PDMS-DA-PU and PDMS/PCL-DA-PU) with Diels–Alder (DA) bonds alternately located in the polymer chains between crosslinking points were prepared based on self-made soft segments, isocyanate terminated polydimethylsiloxane (NCO-PDMS-NCO) or a mixture of NCO-PDMS-NCO and polycaprolactone diol. The elastomers show good self-healing and remoldable behaviors via DA and retro-DA reactions, which was confirmed by UV-vis and 1H NMR. In order to enhance the mechanical properties, the PCL segment was introduced into the chain of poly(siloxane-urethane). The microphase separation structure and covalent crosslinked network endow the polymers with good tensile strength, elasticity and shape recovery ability. Moreover, the biocompatibility of the poly(siloxane-urethane) elastomer was found to be fairly good by cytotoxicity evaluation and animal wound healing experiments, suggesting its potential application in biomedical fields such as artificial skin with a self-healing function.

Graphical abstract: Self-healing poly(siloxane-urethane) elastomers with remoldability, shape memory and biocompatibility

Supplementary files

Article information

Article type
Paper
Submitted
27 Aug 2016
Accepted
31 Oct 2016
First published
04 Nov 2016

Polym. Chem., 2016,7, 7278-7286

Self-healing poly(siloxane-urethane) elastomers with remoldability, shape memory and biocompatibility

J. Zhao, R. Xu, G. Luo, J. Wu and H. Xia, Polym. Chem., 2016, 7, 7278 DOI: 10.1039/C6PY01499B

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