期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 113, 期 -, 页码 792-803出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2018.02.017
关键词
Adsorption; Crystal violet; Graphene oxide/chitosan sponge; Three-dimensional printing; Bionic filter
资金
- National Key Research and Development Program [2016YFC1100704, 2016YFC1102203, 2016YFC1101100]
- Beijing Municipal Science and Technology project [Z151100003715006, Z141107002514073]
- NSFC Research Grant [61227902]
- National Key Technology RD Program [2014BAI11B15]
- Beijing Municipal Administration of Hospitals Clinical Medicine Development of Special Funding [ZYLX201508]
- Capital Health Research and Development of Special Funding [2014-1-2091]
- 111 Project of China [B13003]
Owing to low bearing capacity and efficiency, traditional filters or adsorbents for removal of contaminants like crystal violet (CV) dye required frequent replacement. Besides, the combination of three-dimensional (3D) printing and bionics could break the constraints of traditional configuration. In this study, a novel depth-type hybrid polylactic acid (PLA)@graphene oxide (GO)/chitosan (CS) sponge filter with bionic fish-mouth structure was prepared and fabricated, assisted by 3D printing and double freeze-drying technology, according to the theories of vertical cross-step filtration and swirling flow. And GO/CS sponge and its filtering device were characterized by FITR, SEM, water adsorption and so on. Moreover, it was explained that the impact factors on dye removal mechanism, like GO content (or CS content), contact time, pH, temperature and bionic configuration. As a result, the bionic 3D filtering device demonstrated excellent removal efficiency (97.8 +/- 0.5% for CV) and GO/CS sponge exhibited higher strength (74.5 +/- 3.5 MPa) at the condition of GO content of 9 wt%, contact time of 46 min, pH of 8 and 35 degrees C, respectively. Therefore, the resulting 3D PLA@GO/CS sponge bionic filter via gravity and vortex driving provided new alternatives for effectively dye-water separation, and it showed great promise for application of biological macromolecules in adsorption. (C) 2018 Elsevier B.V. All rights reserved.
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