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高晶度和极相含量在电P(VDF-TrFE) 纳米纤维中具有低分子量

Wenyi Zhu¹, Guanchun Rui, Yongsheng Chen²

¹School of Electrical Engineering and Computer Science, Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.

Journal of applied physics

|May 19, 2025

概括

低分子量聚乙烯化物三乙烯 (P(VDF-TrFE)) 电纳米纤维具有增强的电活性特性. 较短的聚合物链可以在没有后处理的情况下促进铁电晶体的形成,从而提高性能.

科学领域:

材料科学材料科学材料科学
聚合物科学聚合物科学
纳米技术纳米技术

背景情况:

聚乙烯化物 (PVDF) 和其共聚物对压电应用至关重要.
分子重量 (Mw) 显著影响PVDF结晶和极化.
以前,P(VDF-TrFE) 纳米纤维仅由高MW聚合物 (>200 kDa) 制成.

研究的目的:

为了研究由低MW聚合物制造的P(VDF-TrFE) 纳米纤维 (约. 100 kDa) 的时间.
为了证明在没有后处理的情况下实现高电活性相的可行性.
了解聚合物链长度在纳米纤维特性中的作用.

主要方法:

电的P(VDF-TrFE) 与较低的Mw (大约. 100 kDa) 的时间.
优化溶液度和电参数的优化.
纳米纤维结晶性和分子构成的表征.

主要成果:

在没有后处理的情况下,在P ((VDF-TrFE) 纳米纤维中实现了高度电活性相.
较短的聚合物链 (较低的MW) 提高了流动性,促进了铁电晶体的形成.
优化的纳米纤维达到了67%的结晶性和79%的全转变形状.

结论:

低MW P ((VDF-TrFE) 适用于生产电活性纳米纤维.
电过程参数极大地影响铁电相形成.
这项工作为提高铁电聚合物纳米纤维的电活性性能提供了一条途径.

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