Synthesis and Properties of Thiophene and Aniline Copolymer Using Atmospheric Pressure Plasma Jets Copolymerization Technique.

Hyo Jun Jang,Heung-Sik Tae,Choon-Sang Park,Gyu Tae Bae,Eun Young Jung,Bhum Jae Shin

doi:10.3390/polym12102225

Hyo Jun Jang, Heung-Sik Tae + Show 4 more

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https://doi.org/10.3390/polym12102225

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Abstract

This paper investigates the properties of thiophene and aniline copolymer (TAC) films deposited by using atmospheric pressure plasma jets copolymerization technique relative to various blending ratios of aniline and thiophene monomer for synthesizing the donor–acceptor conjugated copolymers. Field emission scanning electron microscopy (FE-SEM) and atomic force microscopy are utilized to measure the surface morphology, roughness and film thickness of TAC films. Structural and chemical properties of TAC films are investigated by Fourier transforms-infrared spectroscopy (FT-IR), time of flight secondary ion mass spectrometry, and X-ray photoelectron spectroscopy. FE-SEM images show that the film thickness and nanoparticles size of the TAC films increase with an addition thiophene monomer in the aniline monomer. FE-SEM, FT-IR results show that TAC films are successfully synthesized on glass substrates in all cases. The iodine doped TAC film on the Si substrate with interdigitated electrodes shows the lowest electrical resistance at blending condition of thiophene of 25%.

Highlights

In recent, donor–acceptor (D–A) conjugated copolymers (CCPs) have been widely investigated on the band gap engineering in the industrial and academic areas for flexible organic field-effect transistors, photocatalysts, polymer solar cells, and electrochromic applications [1,2,3,4]
C-S Park et al has already reported on the high-quality polymer film synthesis using by the atmospheric pressure plasma jets (APPJs) with the simple guiding tube and bluff body (GB) system [19,20]
The APPJs polymerization technique is suitable for synthesizing D–A CCPs based on the blending process of various monomers

Summary

Introduction

Donor–acceptor (D–A) conjugated copolymers (CCPs) have been widely investigated on the band gap engineering in the industrial and academic areas for flexible organic field-effect transistors, photocatalysts, polymer solar cells, and electrochromic applications [1,2,3,4]. Polymers 2020, 12, 2225 the exploitation of the monomer having various substituent groups for increasing the solubility causes a loss of conductivity of the polymer [13] In spite of these limitations, these conventional methods are occasionally unsuitable when the oxidation potential difference between substances is large such as the synthesis of aniline and thiophene [5,14]. The APPJs technique has some unique properties such as one-step process, cost-effective, dry process, low-temperature process, and green synthesis [17,23,24,25] Owing to these reasons, the APPJs polymerization technique is suitable for synthesizing D–A CCPs based on the blending process of various monomers. There have been no reports on the synthesis of copolymer films prepared by the APPJs polymerization technique

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