3D打印调控聚合物晶型制备高压电性能聚合物薄膜
3D Printing Modulated Polymer Crystal to Prepare Polymer Films with High Piezoelectric Properties
吴文涛 1马亚欣 1郑莹莹 1马香 1王健1
作者信息
- 1. 宁夏大学材料与新能源学院,宁夏 银川 750021
- 折叠
摘要
聚偏氟乙烯(PVDF)基聚合物薄膜材料具备优异机械柔韧性、易加工等特性,广泛应用于可穿戴传感设备领域.针对PVDF基聚合物压电性能低的问题,提出一种调控其分子组成与聚集态结构的技术,通过氢化还原、3D打印等手段制备并调控聚偏氟乙烯-三氟乙烯(P(VDF-TrFE))分子链的组成与结构,以增加其β-相含量并实现其内部C—F键的全反式排列,对比分析改性调控前后P(VDF-TrFE)的晶型结构与压电性能,揭示其压电性能提升机理.结果表明,与原始聚偏氟乙烯-三氟氯乙烯(P(VDF-CTFE))、流延制备的P(VDF-TrFE)相比,通过氢化还原技术与 3D打印工艺制备的P(VDF-TrFE)薄膜β-相含量达到 21%,且压电系数由 6 pC/N提升至 25 pC/N,并具有优秀的机械性能.
Abstract
Poly(vinylidene fluoride)(PVDF)-based polymer film materials are widely utilized in wearable sensing devices due to their exceptional mechanical flexibility and ease of processing.To address the issue of the low piezoelectric performance of PVDF-based polymers,we developed a technique for modulating their molecular composition and structural aggregation state.We prepared and modulated the composition and structure of poly(vinylidene fluoride)-trifluoroethylene(P(VDF-TrFE))molecular chains through hydrodynamic reduction and 3D printing,aiming to increase the content of its β-phase and achieve the all-trans arrangement of its internal C-F bonds.The crystalline structure and piezoelectric properties of P(VDF-TrFE)were compared before and after modification,revealing the mechanism behind the enhancement of its piezoelectric properties.The results demonstrate that,in comparison to the original poly(vinylidene fluoride)-chlorotrifluoroethylene(P(VDF-CTFE))and the flow-cast P(VDF-TrFE),the β-phase content of the P(VDF-TrFE)film prepared by hydrogenation reduction and 3D printing reached 21%,with the piezoelectric coefficient increasing from 6 pC/N to 25 pC/N.The resulting P(VDF-TrFE)film exhibits excellent mechanical properties,presenting a promising avenue for advancing integrated materials for sensor-driven applications.
关键词
聚偏氟乙烯/3D打印/化学合成/压电性能Key words
poly(vinylidene fluoride)/3D printing/chemical synthesis/piezoelectric properties引用本文复制引用
基金项目
宁夏重点研发计划项目(引才专项)(2023BSB03035)
宁夏自然科学基金项目(2023AAC03104)
出版年
2024
国家科技期刊平台
NSTL
万方数据