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Semi‐IPNs Reinforced with Silica Janus Nanoparticles and Their Stress Sensing with Mechanoluminescent Probe
Author(s) -
Wu Mengjiao,
Yuan Wei,
Yang Fan,
Liang Fuxin,
Chen Yulan
Publication year - 2021
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.202000442
Subject(s) - materials science , elastomer , janus , nanocomposite , polyurethane , polymer , methacrylate , composite material , nanoparticle , nanosheet , nanotechnology , copolymer
Abstract A series of nanocomposite elastomers are prepared by dispersing surface‐modified silica Janus nanoparticles into semi‐interpenetrating network (Semi‐IPN) of polyurethane/polyethyl methacrylate. Benefiting from the hierarchically crosslinked structures that consist of physical interlocking mediated by hydrogen‐bond‐rich silica Janus nanoparticles and permanent crosslinking by Semi‐IPN, these elastomers exhibit excellent mechanical properties. Moreover, the Janus nanosheet is found more effective in strengthening and toughening the Semi‐IPN, in comparison to Janus hollow sphere. Since 1,2‐dioxetane is covalently embedded in these elastomers as a mechanoluminescent stress probe, stress transfer between the polymer and Janus nanoparticles and the toughening mechanism can be illuminated, which offer exciting opportunities to study the failure process of complex polymer nanocomposites with high spatial and temporal resolution.