Effect of Poly(vinylphenol) on the Ferroelectric Performance of Poly(vinylidene fluoride-trifluoroethylene)
Effect of Poly(vinylphenol) on the Ferroelectric Performance of Poly(vinylidene fluoride-trifluoroethylene)
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DOI：
10.1021/acsapm.9b00060
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发表时间：
2019-07
影响因子：
5
通讯作者：
Ce Mi;N. Gao;Huihui Li;Junteng Liu;Xiaoli Sun;Shouke Yan
中科院分区：
文献类型：
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作者：
Ce Mi;N. Gao;Huihui Li;Junteng Liu;Xiaoli Sun;Shouke Yan
聚偏氟乙烯-三氟乙烯/聚乙烯基苯酚的结构和铁电性能，研究了P（VDF-TrFE）/PVPh共混体系。结果表明，少量PVPh在P（VDF-TrFE）膜表面以均匀分布的小纳米畴形式偏析。PVPh的掺入使P（VDF-TrFE）的居里转变温度和剩余极化略有降低。它稍微增强了矫顽电场（Ec），但在5wt% PVPh的情况下将铁电性质的热稳定性提高了近30 °C。此外，通过保持相对高的介电常数，PVPh的添加有效地降低了介电损耗。这提供了一种有效且简单的方法来制造具有低泄漏、高热稳定性和高击穿强度的基于P（VDF-TrFE）的非易失性柔性存储器。
Structures and ferroelectric properties of poly(vinylidene fluoride-trifluoroethylene)/poly(vinylphenol), i.e., P(VDF-TrFE)/PVPh, blends are studied. It is found that a small amount of PVPh segregates as small nanodomains distributed homogeneously on the surface of a P(VDF-TrFE) film. The incorporation of PVPh depresses the Curie transition temperature and remnant polarization of P(VDF-TrFE) slightly. It enhances the coercive electric field (Ec) slightly but improves the thermal stability of ferroelectric properties by nearly 30 °C with 5 wt % PVPh. In addition, by maintaining the relatively high permittivity, the addition of PVPh effectively lowers the dielectric losses. This provides an efficient and simple way to fabricate P(VDF-TrFE)-based nonvolatile flexible memories with low leakage, high thermal stability, and high breakdown strength.