期刊
CARBOHYDRATE POLYMERS
卷 205, 期 -, 页码 125-134出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2018.10.023
关键词
Sodium alginate; Electrospinning; Dye; Adsorption; Separation
资金
- National Nature Science Foundation of China [51403113, 51573080]
- Natural Science Foundation for Distinguished Young Scientists of Shandong Province [BS2014CL007]
- Postdoctoral Science Foundation of China [2016T90610, 2015M571994, 201501007]
- Postdoctoral Science Foundation of Shandong Province [2016T90610, 2015M571994, 201501007]
- Project of Shandong Province Higher Educational Science and Technology Program [J14LA19]
- Program for Taishan Scholar of Shandong Province
Herein, the three kinds of water-insoluble alginate-based nanofiber membranes were prepared by electrospinning and followed with crosslinking by calcium chloride (CaCl2), glutaraldehyde vapor (GA), and trifluoroacetic acid (TFA) crosslinking, respectively. All the sodium alginate(SA) nanofiber membranes present excellent integrated adsorption performance toward methylene blue (MB). Among these, CaCl2 crosslinked SA membranes exhibit the maximum actual adsorption capacity of 2230 mg/g and shortest adsorption equilibrium time of 50 min to date. On the basis of the selective adsorption of SA, the nanofiber membranes can separate MB/ methyl orange (MO) mixture solution and maintain high separation efficiency even after five cycles. In addition, respective applicable condition for differentially crosslinked SA nanofiber membranes was evaluated. The TFA crosslinked membranes have the least reduction in the adsorption capacity in acidic environment and GA crosslinked membranes adsorb better in alkaline environment. For seawater environment, GA crosslinked membranes show obvious adsorption performance than other crosslinked membranes.
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