波浪形聚苯乙烯和铜微纤维阵列的可控制备及性能

Preparation and Properties of Wavy Polystyrene and Copper Microfiber Arrays

提出基于静电纺丝法制备波浪形聚苯乙烯微纤维阵列,并以之为模板实现波浪形铜微纤维及其阵列的简易可控制备。通过静电纺丝法制备出了具有不同振幅、波长的波浪形聚苯乙烯微纤维,获得了单轴、正交、菱形等多种结构可控的波浪形纤维阵列,发现波浪形纤维振幅随收集板速度的变化规律满足Hopf分岔理论,表明波浪形纤维由直纤维经垂直于收集板移动方向上的非线性扰动产生,且该扰动具有O(2)对称性。以上述聚合物纤维阵列为模板,获得了形貌和结构可控的波浪形铜微纤维阵列,该波浪形铜纤维阵列为一体化的导电网络,其透光性和电阻分别为87%和425Ω,有望作为透明电极应用于光电子器件及其互连线中。

A simple controllable approach to prepare wavy copper(Cu)microfiber arrays by employing electrospun polystyrene(PS)microfibers as the templates was proposed in this study.Wavy PS microfibers with different amplitude and wavelength were obtained by electrospinning.Various arrays of PS microfibers were achieved by simply changing the collection direction of the microfiber,including uniaxial,orthogonal,rhombohedral and ternary cross stacked arrays.It was found that the change in the amplitude of wavy PS microfibers with the collector speed was in accord with Hopf bifurcation theory,and the wavy PS fiber originated from straight fiber by the periodic nonlinear perturbation,possessing O(2)symmetry perpendicular to the collector moving direction.Wavy Cu microfibers and their array were obtained by using wavy PS microfiber as the templates and a wet etching technique.The prepared array of wavy copper microfibers exhibited an average transmittance of87%and electrical resistance of425Ω,indicating its potential application as electrode in transparent optoelectronics.