期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 36, 期 13, 页码 1255-1260出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201500123
关键词
crosslinked networks; polymer synthesis; self-healing; thiol-disulfide chemistry; thiol-ene addition
资金
- Industrial Strategic Technology Development Program in Korea [10035163]
- Korea Research Institute of Chemical Technology
- Korea Evaluation Institute of Industrial Technology (KEIT) [10035163] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Polymer-based crosslinked networks with intrinsic self-repairing ability have emerged due to their built-in ability to repair physical damages. Here, novel dual sulfide-disulfide crosslinked networks (s-ssPxNs) are reported exhibiting rapid and room temperature self-healability within seconds to minutes, with no extra healing agents and no change under any environmental conditions. The method to synthesize these self-healable networks utilizes a combination of well-known crosslinking chemistry: photoinduced thiol-ene click-type radical addition, generating lightly sulfide-crosslinked polysulfide-based networks with excess thiols, and their oxidation, creating dynamic disulfide crosslinkages to yield the dual s-ssPxNs. The resulting s-ssPxN networks show rapid self-healing within 30 s to 30 min at room temperature, as well as self-healing elasticity with reversible viscoelastic properties. These results, combined with tunable self-healing kinetics, demonstrate the versatility of the method as a new means to synthesize smart multifunctional polymeric materials.
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