温度对静电纺丝聚氨酯纳米纤维力学性能的影响

Temperature Effect on the Mechanical Properties of Electrospun PU Nanofibers.

作者信息

Zhou Ji, Cai Qing, Liu Xing, Ding Yanhuai, Xu Fu

机构信息

College of Civil and Environmental Engineering, Hunan University of Science and Engineering, Yongzhou, 425006, Hunan, China.

College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan, 411105, Hunan, China.

出版信息

Nanoscale Res Lett. 2018 Nov 29;13(1):384. doi: 10.1186/s11671-018-2801-1.

DOI:10.1186/s11671-018-2801-1

PMID:30488187

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6261907/

Abstract

Polyurethane (PU) nanofibers were prepared from electrospun method. Atomic force microscopy (AFM) was employed to characterize the mechanical properties of electrospun PU nanofibers. The impact of temperature on the mechanical behavior of PU nanofibers was studied using three-point bending test based on AFM. A Young's modulus of ~ 25 GPa was obtained for PU nanofibers with diameter at ~ 150 nm at room temperature. With decrease in nanofiber's diameter, the increasing Young's modulus can be due to the surface tension effect. The Young's modulus of the PU nanofiber decreased linearly while the fibrous morphology was maintained with the increase of temperature.

摘要

采用静电纺丝法制备了聚氨酯（PU）纳米纤维。利用原子力显微镜（AFM）对静电纺丝PU纳米纤维的力学性能进行了表征。基于AFM，通过三点弯曲试验研究了温度对PU纳米纤维力学行为的影响。室温下，直径约为150 nm的PU纳米纤维的杨氏模量约为25 GPa。随着纳米纤维直径的减小，杨氏模量的增加可能是由于表面张力效应。随着温度的升高，PU纳米纤维的杨氏模量呈线性下降，而纤维形态保持不变。