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Nanomaterials (Basel). 2019 Oct 30;9(11). pii: E1542. doi: 10.3390/nano9111542.

Easily Synthesized Polyaniline@Cellulose Nanowhiskers Better Tune Network Structures in Ag-Based Adhesives: Examining the Improvements in Conductivity, Stability, and Flexibility.

Author information

1
School of Materials Science and Engineering, Harbin Institute of Technology, Nangang District, Harbin 150001, China. 11749286@mail.sustc.edu.cn.
2
Department of Materials Science and Engineering, Southern University of Science and Technology, Xili, Nanshan District, Shenzhen 518055, China. 11749286@mail.sustc.edu.cn.
3
Department of Materials Science and Engineering, Southern University of Science and Technology, Xili, Nanshan District, Shenzhen 518055, China. gaoxl@mail.sustc.edu.cn.
4
Department of Materials Science and Engineering, Southern University of Science and Technology, Xili, Nanshan District, Shenzhen 518055, China. 11749154@mail.sustech.edu.cn.
5
Department of Materials Science and Engineering, Southern University of Science and Technology, Xili, Nanshan District, Shenzhen 518055, China. cuihh3@mail.sustech.edu.cn.
6
Department of Materials Science and Engineering, Southern University of Science and Technology, Xili, Nanshan District, Shenzhen 518055, China. 11612916@mail.sustech.edu.cn.
7
Department of Materials Science and Engineering, Southern University of Science and Technology, Xili, Nanshan District, Shenzhen 518055, China. 11611831@mail.sustech.edu.cn.
8
School of Materials Science and Engineering, Harbin Institute of Technology, Nangang District, Harbin 150001, China. 11849284@mail.sustech.edu.cn.
9
Department of Materials Science and Engineering, Southern University of Science and Technology, Xili, Nanshan District, Shenzhen 518055, China. 11849284@mail.sustech.edu.cn.
10
Department of Materials Science and Engineering, Southern University of Science and Technology, Xili, Nanshan District, Shenzhen 518055, China. chengc@sustc.edu.cn.
11
School of Materials Science and Engineering, Harbin Institute of Technology, Nangang District, Harbin 150001, China. tianyh@hit.edu.cn.
12
Department of Materials Science and Engineering, Southern University of Science and Technology, Xili, Nanshan District, Shenzhen 518055, China. tianyq@sustech.edu.cn.

Abstract

It is essential to develop a novel and versatile strategy for constructing electrically conductive adhesives (ECAs) that have superior conductivity and high mechanical properties. In this work, easily synthesized polyaniline@cellulose (PANI@CNs) nanowhiskers with a high aspect ratio and excellent solubility in 1,4-dioxane were prepared and added to conventional Ag-containing adhesives. A small amount of PANI@CNs can dramatically tune the structure of the ECAs' conductive network and significantly improve the conductivity of the ECAs. Good solubility of PANI@CNs in solvents brings excellent dispersion in the polymer matrix. Thus, a three-dimensional (3D) conducting network formed with dispersed PANI@CNs and Ag flakes can enhance the conductivity of ECAs. The conductivity of the ECAs (with 1.5 wt% PANI@CNs and 55 wt% Ag flakes) showed three orders of magnitude higher than that of the ECAs filled with 55 wt% Ag flakes and 65 wt% Ag flakes. Meanwhile, the integration of PANI@CNs with Ag flakes in polymer matrices also significantly enhanced the mechanical compliance of the resulted ECAs. The resistivity remained unchanged after rolling the PANI@CNs-containing ECAs' film into a 4 mm bending radius for over 1500 cycles. A bendable printed circuit was fabricated using the above PANI@CNs-containing ECAs, which demonstrated their future potential in the field of flexible electronics.

KEYWORDS:

electrical properties; electrically conductive adhesives; flexible electronics; polyaniline@cellulose; preparation

PMID:
31671586
DOI:
10.3390/nano9111542
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