结晶
氢键
接受者
材料科学
溶剂
相(物质)
高分子化学
化学工程
电介质
共晶体系
复合数
相变
化学
复合材料
有机化学
分子
微观结构
热力学
工程类
物理
光电子学
凝聚态物理
作者
Muhua Yuan,Haijun Wang,Huihui Li,Chunlei Yuan,Tong Wang,Haibo Yang
标识
DOI:10.1002/macp.202100416
摘要
Abstract Adding additives is the most convenient and effective way to induce polar poly(vinylidene fluoride) (PVDF) crystals which exhibit excellent ferroelectronic, piezoelectric, and dielectric properties. In this work, a kind of environmentally friendly additive, deep eutectic solvent (DES), is introduced to induce the crystallization of polar phases and accelerate the α ‐to‐ γ phase transition, which enables the fraction of γ ( γ ′)‐phase crystals to exceed 90% in the PVDF/DES composite containing only 1 wt% DES. The ion–dipole interaction between PVDF and hydrogen bond acceptor in DES induces the polar molecular conformation, thus bringing about the formation of polar phase crystals. However, hydrogen bond donor promotes the dispersion of hydrogen bond acceptor in PVDF matrix, contributing to the flexibility of the composites.
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