期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 276, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2021.119294
关键词
Lignosulfonates; MXene; Sodium alginate; Ethanol dehydration; Pervaporation
资金
- Fundamental Research Funds for Central Universities [2021ZY19]
- Open Research Fund Programof Key Laboratory of Cleaner Production and Integrated Resource Uti-lization of China National Light Industry [CP2020YB7]
- National Natural Science Foundation of China [21736001, 21776153]
This study successfully prepared a pervaporation membrane with a three-component hybrid structure using lignosulfonates, MXene, and sodium alginate, which increased the permeation flux and separation factor of the membrane by improving hydrophilicity and reducing swelling.
Lignosulfonates are a by-product of the agricultural and forestry waste and paper industries. Strengthening the sustainable use of lignosulfonates is a problem to be solved. In this study, hydrophilic agricultural and forestry waste calcium lignosulfonate (CaLS) was combined with single/double-layered MXene, and added to the natural polysaccharide sodium alginate (SA) to prepare a pervaporation me, membrane with a three-component hybrid structure. Characterization experiments such as scanning electron microscopy and contact angle demonstrated that CaLS increased the hydrophilicity and reduced swelling of the membrane, and MXene formed a layered cross-sectional morphology that further reduced swelling. A 90% ethanol aqueous solution was used to evaluate the dehydration performance of the membrane. The results showed that the permeation flux and separation factor of the membrane increased by 74% and 160%, respectively. Compared to the pure SA membrane after CaLS was incorporated. MXene further improved the pervaporation performance of the MXene@CaLS/SA membrane, with the permeation flux of about 938 g center dot m- 2 center dot h- 1, and the separation factor of 4612 (two and four times higher than the pure SA membrane, respectively). This study provides a theoretical and technical basis for the development of new separation materials, and will help expand the high-value utilization of lignosulfonates.
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