Facile Preparation of Electrospun Carbon Nanofiber Aerogels for Oils Absorption

doi:10.11901/1005.3093.2020.574

Chinese Journal of Materials Research

2021, Vol. 35

Issue (11): 820-826 DOI: 10.11901/1005.3093.2020.574

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Facile Preparation of Electrospun Carbon Nanofiber Aerogels for Oils Absorption

XU Wencui¹^,², LIN Yingzheng², SHAO Zaidong², ZHENG Yuming², CHENG Xuan¹(

), ZHONG Lubin²(

)

^1.College of Materials, Xiamen University, Xiamen 361005, China
^2.CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China

Cite this article:

XU Wencui, LIN Yingzheng, SHAO Zaidong, ZHENG Yuming, CHENG Xuan, ZHONG Lubin. Facile Preparation of Electrospun Carbon Nanofiber Aerogels for Oils Absorption. Chinese Journal of Materials Research, 2021, 35(11): 820-826.

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Abstract

The polyacrylonitrile (PAN) three-dimensional nanofibers were prepared by electrospinning and liquid phase receiving technique, and then the ultra-light carbon nanofiber aerogels (CNFAs) with excellent mechanical properties were obtained by post thermal stabilizing the nanofibers. There exists a network of open holes formed by overlapping carbon nanofibers inside the CNFAs, which can bounce back to its original shape after 80% strain. The water contact angle of CNFAs increased to 145^o after hydrophobic treatment via vapor depositionof polydimethylsiloxane (PDMS). The effect of the original bulk density of electro-spun nanofibers on the volume shrinkage, density, oil absorption capacity and cyclic adsorption capacity of CNFAs was assessed. The results show that 4 mg·mL^-1 is a more appropriate initial bulk density, and the adsorption capacity of CNFAs for oil pollutants can reach 185 times of its own weight. The CNFAs of saturated absorption could be recovered by direct combustion or extrusion, and even after 10 cycles of combustion recovery, the adsorption capacity of the recovered CNFAs could remain by a rather stable level.

Key words: surface and interface in the materials carbon aerogel electrospinning oil sorbent liquid-assist collector

Received: 30 December 2020

ZTFLH:

X703.1

Fund: National Natural Science Foundation of China(51578525)

About author: ZHONG Lubin, Tel: 15960240263, E-mail: lbzhong@iue.ac.cn
CHENG Xuan, Tel: 18906033999, E-mail: xcheng@xmu.edu.cn

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	Wencui XU
	Yingzheng LIN
	Zaidong SHAO
	Yuming ZHENG
	Xuan CHENG
	Lubin ZHONG

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https://www.cjmr.org/EN/10.11901/1005.3093.2020.574 OR https://www.cjmr.org/EN/Y2021/V35/I11/820

Fig.1 Optical photo graphs of CNFAs in different preparation steps

Fig.2 Compressibility property comparison of NFAs (a) and CNFAs (b)

Fig.3 Stress-strain curves of carbon nanofiber aerogels with different initial densities (a) and heat treated at different temperatures (b) after 80% strain

Fig.4 Raman spectra of carbon nanofiber aerogels heat treated at different temperatures

Fig.5 Volume shrinkage rate and final density of CNFAs

Fig.6 SEM images of CNFAs before (a) and after (b) PDMS vapor deposition

Fig.7 Water contact angle (WCA) measurement of CNFAs

Fig.8 WCA measurement of CNFAs after PDMS vapor deposition for different time

Fig.9 Absorption capacity toward ethanol of CNFAs with different original stacking density

Fig.10 Absorption capacity of CNFAs (original stacking density 4 mg/mL) toward diverse oils

Fig.11 Regeneration process of saturated CNFAs by combustion

Fig.12 Cyclic absorption capacity of CNFAs with different original density recycled by combustion

Fig.13 Regeneration process of saturated CNFAs by squeezi

Fig.14 Cyclic absorption capacity of CNFAs with different original density recycled by squeezing

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