Self-polarized ferroelectric PVDF homopolymer ultra-thin films derived from Langmuir-Blodgett deposition

被引：112
|
作者：
Chen, Shuting [1 ,2 ]
Li, Xue [1 ,2 ]
Yao, Kui [1 ]
Tay, Francis Eng Hock [2 ]
Kumar, Amit [2 ]
Zeng, Kaiyang [2 ]
机构：
[1] ASTAR, Inst Mat Res & Engn, Singapore 117602, Singapore
[2] Natl Univ Singapore, Dept Mech Engn, Singapore 119260, Singapore
来源：
POLYMER | 2012年 / 53卷 / 06期
关键词：
Poly(vinylidene fluoride) (PVDF); Ferroelectric polymer; Langmuir-Blodgett film; POLY(VINYLIDENE FLUORIDE) FILMS; CRYSTALLINE PHASE; BETA-CRYSTALLINE; TRANSITION; COPOLYMER; BLENDS; FORMS; WATER;
D O I：
10.1016/j.polymer.2012.01.058
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
It was found that Langmuir-Blodgett (LB) deposition process led to the direct formation of ferroelectric 13 phase in poly(vinylidene fluoride) (PVDF) homopolymer ultra-thin films, in which the molecular chains were parallel to the substrates and the dipoles were aligned perpendicular to the substrates. Theoretical analysis and experimental results further showed that the mechanism of forming the beta phase and the dipole orientation were attributed to the hydrogen bonds formed between the PVDF molecules and water through the LB deposition. A large local effective piezoelectric coefficient (d(zz)) of -49.4 pm/V was observed in the self-polarized PVDF LB film. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1404 / 1408
页数：5
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