Methylcellulose strengthened polyimide aerogels with excellent oil/water separation performance
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ORIGINAL RESEARCH
Methylcellulose strengthened polyimide aerogels with excellent oil/water separation performance Longhai Zhuo
. Cong Ma . Fan Xie . Shanshan Chen . Zhaoqing Lu
Received: 22 April 2020 / Accepted: 24 June 2020 Ó Springer Nature B.V. 2020
Abstract Polyimide (PI) aerogels have great potential in oil/water separation field, but the extreme volume shrinkage during the fabrication still remains challenging. Herein, a simple yet efficient strategy of incorporating methylcellulose (MC) in PI aerogels is proposed. The MC/PI composite aerogels were fabricated by freeze-drying plus thermal imidization with subsequent trimethylchlorosilane (TMCS) functionalization. The results revealed that MC entered the skeleton of aerogels and strengthened it effectively by Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10570-020-03311-6) contains supplementary material, which is available to authorized users. L. Zhuo (&) Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi’an 710021, China e-mail: [email protected]
promoting the formation of robust and complete 3D porous structure, and the defects of as-prepared aerogels were eliminated when the proportion of MC was beyond 10 wt%. After modification with TMCS, the water contact angle of aerogels increased significantly by 30°–40°, and the functionalized aerogels showed excellent oil absorption capacity up to 28.44 g/g. The outstanding oil absorbency and simple process for separating oil and water with MC/PI composite aerogels are promising candidates in the field of oil/water separation. Keywords Polyimide Methylcellulose Aerogel Oil/water separation F. Xie S. Chen Z. Lu College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
L. Zhuo Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology, Shaanxi University of Science and Technology, Xi’an 710021, China C. Ma College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
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Cellulose
Introduction With the rapid development of technology and industry, human beings are confronted with severe environmental pollution (Najafian et al. 2018, 2019; Orooji et al. 2020a, b; Ranjeh et al. 2019, 2020). Particularly, the oil pollution problems caused by petroleum spills and leaks, have attracted the extensive attention of researchers (Gupta et al. 2017; Mehdizadeh et al. 2020; Shahed et al. 2020; Wang et al. 2020a, b). To reduce the environmental and ecological influences, several techniques have been widely used to deal with the oil pollution, such as oil fencing (Hu et al. 2018; Kim et al. 2009), chemical dispersion (Wang et al. 2013; Yan et al. 2019a), superwettable membrane separation (Chu et al. 2015; Lin and Hong 2019; Yan et al. 2019b), bioremediation (Dashti et a
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