文献类型：期刊文献

英文题名：Microstructure evolution of electrospun polyvinylidene fluoride fibers via stretching at varying temperatures

作者：Li, Xiang[1];Xie, Hui[1];Lin, Jinyou[2];Zeng, Yongchun[3]

机构：[1]Shaoxing Univ, YuanPei Coll, Shaoxing 312000, Zhejiang, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China;[3]Donghua Univ, Coll Text, Shanghai 201620, Peoples R China

年份：2022

卷号：262

外文期刊名：POLYMER

收录：SCI-EXPANDED(收录号：WOS:000885971900002)、、EI(收录号：20224413026130)、Scopus(收录号：2-s2.0-85140652680)、WOS

基金：This research was supported by the Natural Science Foundation of Zhejiang Province, Zhejiang Province, China (No. LQ22A020011) , and the National Nature Science Foundation of China, China (No. 52173026) .

语种：英文

外文关键词：Electrospun fibers; PVDF; Microstructure evolution; Temperature; Stretching; Synchrontron radiation

外文摘要：Understanding the microstructure of electrospun fibers is critical for tailoring fiber properties. The single-step acquisition of electrospun polyvinylidene fluoride fibers enriched with beta-phase content is a promising energy material to replace butteries in small-scale flexible electronics. In this work, we focused on the evolution of the microstructure of electrospun PVDF fibers during stretching at varying temperatures and investigated the mechanism of electrospun fibers stretching in the view of the combination of fiber micro-structure and macroscopic morphology considerations. The responses of alignment and structure, diameter, crystal orientation and crystal structure of electrospun fibers on the synchronous stimuli of temperatures and stretching were studied in detail. We found that at 150 degrees C, under the stimulation of stress, the fibers with lower alignment present higher molecular orientation, beta-phase content reaching up to 90.5%, and excellent mechanical properties, which can be the main candidates for energy harvesting. Furthermore, not only macroscopic morphology but also the fiber microstructure is crucial for improving mechanical property of electrospun PVDF fibers membrane. The microstructure responses of electrospun PVDF fibers on such synchronous stimuli are positive for regulating the final properties of products, which also can open a new avenue for the design and exploitation of other electrospun fibers.