基于亲水性可控棉线有效分离苏丹I和罗丹明B

doi:10.11896/cldb.21010136

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Abstract Thread has been used as a low-cost solid phase for chromatographic separation of organic pigments. However, the role of thread hydrophilicity in the separation has not been systematically investigated. Moreover, direct harvesting of separated pigments has not been achieved, either. Herein, a cotton thread-based system with controlled hydrophilicity was fabricated for the separation and harvesting of Sudan I and Rhodamine B in the mixture. The thread was exposed to oxygen plasma at different powers, durations and enwinding ways to tailor its hydrophilicity. The thread enwound on a shelf in a zigzag pattern could reach the highest hydrophilicity after exposure to the plasma at the power of 10.15 W for 8 min. The separation of Sudan I and Rhodamine B greatly depends on the thread hydrophilicity and the solvent used to dissolve them. The pigments-formic acid/methanol system could achieve the most effective separation on the thread with the highest hydrophilicity. A mechanism involving the affinity of pigments to the fibers and the transfer capability of the solvent was proposed to explain the hydrophilicity-dependent separation process on the thread. Based on the mechanism, the separated pigments were eluted from the thread-based chromatographic system with formic acid/methanol solution. Rhodamine B can be harvested at the initial 20 min. After 30 min, Sudan I is the prominent substance in the eluted solution. This work may not only reveal the critical role of hydrophilicity in the thread-based chromatographic system, but also expand its application in pigment separation and harvest.

Key words： cotton thread chromatography hydrophilicity microfluidics pigment separation.

Published: 12 November 2021

CLC number:

TS116

Fund:This work was financially supported by Chongqing Natural Science Foundation (cstc2019jcyj-msxmX0314), Innovation Teams in Colleges and Universities of Chongqing (CXQT20005) and Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and Devices.

Corresponding Authors: zslu@swu.edu.cn; lingyu12@swu.edu.cn

About author:: Jing Xiong is currently studying for her master’s degree in Institute for Clean Energy & Advanced Mate-rials, School of Materials & Energy, Southwest University, Chongqing, P. R. China. Her research focuses on thread-based microfluidic system.
Zhisong Lu received his Ph.D. degree in school of chemical & biomedical engineering from Nanyang Technological University, Singapore in 2011, and is currently a professor in School of Materials & Energy, Southwest University, Chongqing, P. R. China. Prof. Lu’s research expertise is in smart fibers/textiles and nanomaterials-based biosensors. With an h-index of 37 and total citation of 4 300, he has co-authored more than 160 papers in refereed journals and has filed 11 patents.

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	XIONG Jing
	LI Yadan
	WU Liang
	XIAO Gang
	WANG Xin
	LIANG Liping
	QIAO Yan
	LU Zhisong
	YU Ling

Cite this article:

XIONG Jing,LI Yadan,WU Liang, et al. Tailoring Hydrophilicity of Cotton Thread for Efficient Separation of Sudan I and Rhodamine B[J]. Materials Reports, 2021, 35(20): 20166-20175.

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http://www.mater-rep.com/EN/10.11896/cldb.21010136 OR http://www.mater-rep.com/EN/Y2021/V35/I20/20166

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