Preparation and Corrosion Resistance of Graphene/Acetic Acid Doped Polyaniline

doi:10.11901/1005.3093.2020.247

Chinese Journal of Materials Research

2021, Vol. 35

Issue (5): 357-363 DOI: 10.11901/1005.3093.2020.247

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Preparation and Corrosion Resistance of Graphene/Acetic Acid Doped Polyaniline

YANG Xiaogang¹, CUI Shihong¹, LI Bin²(

), WANG Chuanjie¹, HAN Jiejia¹

^1.College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
^2.College of Material Science Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

Cite this article:

YANG Xiaogang, CUI Shihong, LI Bin, WANG Chuanjie, HAN Jiejia. Preparation and Corrosion Resistance of Graphene/Acetic Acid Doped Polyaniline. Chinese Journal of Materials Research, 2021, 35(5): 357-363.

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Abstract

The primary doped products of RGO/PANI were synthesized via in situ polymerization method in acetic acid with graphene (RGO) and different proportions aniline (ANI) as raw materials, and then the secondary doped products of RGO/PANI were obtained via de-doping with ammonia and afterwards re-doping with acetic acid. The structure and morphology of the prepared products were characterized by IR, UV and SEM. Their anticorrosion performance was assessed by electrochemical workstation. The results show that the primary doped products with the mass ratio 1:10 of RGO to ANI had the best morphology and anti-corrosion property. The polyaniline grown on the surface of graphene is about 300~650 nm in length and 70~100 nm in diameter, and the corrosion inhibition efficiency was up to 73.19%. The products obtained by secondary doping of acetic acid had better morphology, higher corrosion inhibition efficiency and excellent corrosion resistance performance. The corrosion inhibition efficiency is up to 80.21%.

Key words: composite graphene polyaniline acetic acid secondary doping anti-corrosion

Received: 22 June 2020

ZTFLH:

TB332

Fund: National Natural Science Foundation of China(41106070);State Key Laboratory of Heavy Oil Processing(SKLOP201603003)

About author: LI Bin, Tel: 13153242817，E-mail: lbyxg95@126.com

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	Xiaogang YANG
	Shihong CUI
	Bin LI
	Chuanjie WANG
	Jiejia HAN

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https://www.cjmr.org/EN/10.11901/1005.3093.2020.247 OR https://www.cjmr.org/EN/Y2021/V35/I5/357

Fig.1 SEM images of different doping state of PANI and RGO/ ANI in different proportion and different doping state (a) doped PANI, (b) re-doped PANI, (c) RGO/PANI5, (d) RGO/PANI10, (e) RGO/PANI15, (f) RGO/PANI20, (g) RGO/PANI25 and (h) RGO/re-doped PANI

Fig.2 Infrared spectra of doped product (a) and re-doped product (b)

Fig.3 Uv-Vis spectra of doped product (a) and re-doped product (b)

Fig.4 Polarization curves of doped product (a) and re-doped product (b)

Table 1 Fitting results of polarization curve

Fig.5 Electrochemical impedance spectroscopy of doped product (a) and redoped product (b)

Fig.6 Impedance spectrum equivalent circuit

Table 2 Fitting results of electrochemical impedance spectroscopy

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