磁性壳聚糖半互穿热膨胀水凝胶的制备及对Cr(Ⅵ)的吸附性能

doi:10.11896/cldb.20020081

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Abstract Chitosan semi-interpenetrating thermo-swelling hydrogels (Semi-INP) were synthesized by chitosan, acrylamide, and thermosensive macromonomer as raw materials and N, N′-methylenebis (acrylamide) as crosslinker through aqueous solution semi-interpenetrating network polymerization method. Magnetic chitosan semi-interpenetrating thermo-swelling hydrogels (Semi-INP/Fe₃O₄) were obtained by introducing Fe₃O₄ nanoparticles into Semi-INP through an in situ chemical co-precipitation method. The prepared samples were characterized by Fourier transform infrared spectrometer (FTIR), X-ray diffraction (XRD), thermal gravimetry (TG), and field emission scanning electron microscopy (SEM). The thermo-swelling property and the effects of adsorption time, temperature, absorbent dosage on the adsorption of Cr(Ⅵ) were investigated. Experimental results show Semi-INP/Fe₃O₄ were successfully prepared, and the hydrogels had good thermo-swelling properties. The adsorption removal of Cr(Ⅵ) increased with the increasing of adsorption time and adsorption temperature. The increase of absorbent dosage would raise the removal efficiency. At the condition of temperature is 70 ℃, pH=3.0, 10 g/L Semi-INP3/Fe₃O₄, and the initial Cr(Ⅵ) concentration is 10 mg/L, the removal efficiency could reach 98.03%.

Key words： magnetism chitosan thermo-swelling hydrogel Cr(Ⅵ) adsorption removal

Published: 04 June 2021

CLC number:

TQ322.4

Fund:Natural Science Foundation of Guizhou Province ([2018]1122, [2019]1252); the National Natural Science Foundation of China (21464005); the Youth Science and Technology Talent Development Project of the Education Department of Guizhou Province (KY2018263).

About author:: Yu Wang received his Ph.D. degree in polymer che-mistry and physics from Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences in 2011. Currently he is a professor at Guizhou Education University. His research interests focus on the design and synthesis of novel stimuli-responsive nanocomposite hydrogels, solution polymer materials and their applications in environmental catalysis and water treatment. He has published more than 50 journal papers, applied 15 national invention patents and 5 of them were authorized.

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	WANG Yu
	REN Junpeng
	ZHAO Jun
	ZHOU Jinkang
	LI Xiaoping

Cite this article:

WANG Yu,REN Junpeng,ZHAO Jun, et al. Preparation of Magnetic Chitosan Semi-Interpenetrating Thermo-swelling Hydrogels and Its Adsorption for Cr(Ⅵ)[J]. Materials Reports, 2021, 35(10): 10205-10210.

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http://www.mater-rep.com/EN/10.11896/cldb.20020081 OR http://www.mater-rep.com/EN/Y2021/V35/I10/10205

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