电纺丝自掺杂水溶性导电聚合物制备电导率与体膜相当的纳米线

IF 4.7 3区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Cephas Amoah, Jorge Fernando Terán Morales, Usmaan Mahmood and W.G Skene*, 
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引用次数: 0

摘要

导电聚合物共混物(如PEDOT:PSS)在柔性衬底(如PDMS)上的静电纺丝已成为获得导电可拉伸衬底的实用方法。然而,当掺杂聚合物被静电纺丝成纳米纤维时,其固有的导电性往往不能被保留。知道PSS掺杂会导致纳米纤维中的绝缘畴,本研究旨在消除这种限制电导率的外部掺杂。一种完全水溶性的自掺杂导电聚合物(p(PDS)),不需要外部掺杂,用于静电纺丝制备纳米纤维。这是为了取代静电纺丝纳米纤维中的PEDOT:PSS,其导电性可以与薄膜中相应的体积导电性相当。为此,研究了载体聚合物含量、有机共溶剂和pH值对纳米纤维形貌和电导率的影响。通过调整静电纺丝溶液的pH值,p(PDS)在PDMS胶带上静电纺丝纳米纤维的片电阻提高了100倍(4.5 × 104 Ω/sq);同时加入DMF作为助溶剂。这种改进不需要静电纺丝后掺杂交换处理。当拉伸衬底时,在弹性带上静电纺的纳米纤维保持阈值导电性,高于100%。此外,释放施加的应力/应变后,原始板的阻力恢复。静电纺丝溶液组成对导电纳米纤维形态的影响提供了关键知识,可用于制备导电可拉伸基板,这些基板可能满足其在可穿戴电子产品中使用的机械和电气要求。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Nanowires with Conductivities Comparable to Their Bulk Films from an Electrospun Self-Doped Water-Soluble Conductive Polymer

Nanowires with Conductivities Comparable to Their Bulk Films from an Electrospun Self-Doped Water-Soluble Conductive Polymer

Electrospinning of conducting polymer blends, such as PEDOT:PSS, on a flexible substrate such as PDMS has been a practical approach to obtaining stretchable substrates that are conductive. However, the intrinsic conductivity of the doped polymer is often not preserved when it is electrospun as nanofibers. Knowing the PSS dopant leads to insulating domains in the nanofibers, this study aimed to eliminate this conductivity-limiting external dopant. A fully water-soluble, self-doped conductive polymer (p(PDS)), not requiring an external dopant, served to prepare nanofibers by electrospinning. This was to replace PEDOT:PSS in electrospinning nanofibers, whose conductivity could be on par with its corresponding bulk conductivity in thin films. Toward this goal, the effects of carrier polymer content, organic cosolvent, and pH on both the morphology and conductivity of the nanofibers were assessed. The sheet resistance of nanofibers electrospun from p(PDS) on PDMS tape improved >100-fold (4.5 × 104 Ω/sq) by adjusting the electrospinning solution to pH < 2 along with adding DMF as a cosolvent. Postelectrospinning dopant exchange treatment was not required for this improvement. The nanofibers electrospun on an elastomeric tape maintained a threshold conductivity when stretching the substrate, upward of 100%. Also, the original sheet resistance was restored upon releasing the applied stress/strain. The effects of electrospinning solution composition on the morphology of the conductive nanofibers provide key knowledge that can be used for preparing conductive stretchable substrates that potentially meet the mechanical and electrical requirements for their use in wearable electronics.

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来源期刊
CiteScore
7.20
自引率
4.30%
发文量
567
期刊介绍: ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/​Abstracted: Web of Science SCIE Scopus CAS INSPEC Portico
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