期刊
NANOMATERIALS
卷 11, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/nano11081996
关键词
few-layer black phosphorus; polymer blend composites; in situ RAFT polymerization; morphology
类别
资金
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program [670173]
- Italian Ministry of Education, University and Research (MIUR) [2017KFY7XF]
Researchers have reported the preparation of biphasic polystyrene/poly(methyl methacrylate) composites containing few-layer black phosphorus by sonicated-assisted liquid-phase exfoliation, as well as the preparation of block copolymer/black phosphorus composite via in situ reversible addition-fragmentation chain transfer (RAFT) polymerization. Raman spectroscopy and scanning electron microscopy confirmed the stability of black phosphorus structure in both composites.
Exfoliated black phosphorus (bP) embedded into a polymer is preserved from oxidation, is stable to air, light, and humidity, and can be further processed into devices without degrading its properties. Most of the examples of exfoliated bP/polymer composites involve a single polymer matrix. Herein, we report the preparation of biphasic polystyrene/poly(methyl methacrylate) (50/50 wt.%) composites containing few-layer black phosphorus (fl-bP) (0.6-1 wt.%) produced by sonicated-assisted liquid-phase exfoliation. Micro-Raman spectroscopy confirmed the integrity of fl-bP, while scanning electron microscopy evidenced the influence of fl-bP into the coalescence of polymeric phases. Furthermore, the topography of thin films analyzed by atomic force microscopy confirmed the effect of fl-bP into the PS dewetting, and the selective PS etching of thin films revealed the presence of fl-bP flakes. Finally, a block copolymer/fl-bP composite (1.2 wt.%) was prepared via in situ reversible addition-fragmentation chain transfer (RAFT) polymerization by sonication-assisted exfoliation of bP into styrene. For this sample, P-31 solid-state NMR and Raman spectroscopy confirmed an excellent preservation of bP structure.
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