Institute of Polymer Materials, Department of Material Science, Faculty of Engineering, Friedrich-Alexander-University Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany.
KeyLab Advanced Fiber Technology, Bavarian Polymer Institute, Dr.-Mack-Strasse 77, 90762 Fürth, Germany.
Int J Mol Sci. 2022 Jul 30;23(15):8451. doi: 10.3390/ijms23158451.
Highly oriented electrospun conductive nanofibrous biocomposites (CNBs) of polylactic acid (PLA) and polyaniline (PANi) are fabricated using electrospinning. At the percolation threshold (), the growth of continuous paths between PANi particles leads to a steep increase in the electrical conductivity of fibers, and the McLachlan equation is fitted to identify . Annealing generates additional conductive channels, which lead to higher conductivity for dynamic percolation. For the first time, dynamic percolation is investigated for revealing time-temperature superposition in oriented conductive nanofibrous biocomposites. The crystallinity () displays a linear dependence on annealing temperature within the confined fiber of CNBs. The increase in crystallinity due to annealing also increases the Young's modulus of CNBs. The present study outlines a reliable approach to determining the conductivity and elasticity of nanofibers that are highly desirable for a wide range of biological tissue applications.
采用静电纺丝技术制备了聚乳酸（PLA）和聚苯胺（PANi）高度取向的导电纳米纤维生物复合材料（CNBs）。在渗流阈值（）时，PANi 颗粒之间连续路径的生长导致纤维电导率急剧增加，并用 McLachlan 方程进行拟合以确定。退火会产生额外的导电通道，从而导致动态渗流的电导率更高。首次研究了动态渗流，以揭示取向导电纳米纤维生物复合材料中的时温叠加。结晶度（）在 CNBs 的受限纤维内随退火温度呈线性关系。由于退火导致结晶度增加，也会增加 CNBs 的杨氏模量。本研究概述了一种可靠的方法来确定纳米纤维的导电性和弹性，这对于广泛的生物组织应用是非常理想的。
