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Tuning pore size and surface charge of poly(piperazinamide) nanofiltration membrane by enhanced chemical cleaning treatment
Ren, Yuling1; Zhu, Junyong2; Feng, Shichao1; Chen, Xiangrong1; Luo, Jianquan1; Wan, Yinhua1
2022-03-01
Source PublicationJOURNAL OF MEMBRANE SCIENCE
ISSN0376-7388
Volume643Pages:11
AbstractSeparation of divalent salts and small organics plays a paramount in biorefinery and food industries. Nanofiltration (NF) membranes featuring suitable pore aperture ranges enables achievement of this goal, yet it fails in attaining a high liquid permeance and selectivity due to the presence of a highly crosslinked polyamide (PA) layer. In this work, the separation efficiency of monosaccharides and divalent salts by NF can be significantly improved by using a facile post-treatment approach. Assisted by chemical cleaning using three types of commonly used agents (H2SO4, NaOH and NaClO), controlled hydrolysis of PA groups is adopted to modulate the crosslinking degree, pore size, and surface charge of PA layer. After systematically comparing the different posttreatment agents and optimizing the treatment conditions, 3000 ppm NaClO treatment for 48 h is selected as the best for enhancing the separation of xylose and Na2SO4. The un-crosslinked -NH groups that serve as sites chloritized by the NaClO in the post-treatment process trigger the hydrolysis of the PA chains, thus enabling the formation of a loose, strongly electronegative and narrow pore size distributed PA film. Such hydrolysis can also eliminate the "weak points" of the separation layer which are susceptible to pH and salts, and the membrane structure is strengthened and becomes more stable at different pH although the post-treated membranes have larger pores and more charges. This results in a remarkable decline in xylose rejection (from 40.0% to 18.0%) while maintaining the high retention of Na2SO4 (97.1%), leading to an improved separation factor from 2.7 to 5.4 with a 93.3% permeability improvement. The chlorinated NF membrane also maintains excellent separation performance in crossflow filtration process.
KeywordChemical cleaning Separation selectivity Pore size adjustment Surface charge regulation Desalination
DOI10.1016/j.memsci.2021.120054
Language英语
WOS KeywordREVERSE-OSMOSIS MEMBRANE ; INTERFACIAL POLYMERIZATION ; PROMOTED HYDROLYSIS ; ACID ; PH ; PERFORMANCE ; MODEL ; AMIDE ; SALT ; ELECTRODIALYSIS
Funding ProjectProvince Key Research and Development Program of Shandong[2019JZZY010348] ; Science and Technology Service Network Program of Chinese Academy of Sciences[KFJ-STS-QYZX-096] ; ZheJiang MEY Membrane Technology CO.,LTD.
WOS Research AreaEngineering ; Polymer Science
WOS SubjectEngineering, Chemical ; Polymer Science
Funding OrganizationProvince Key Research and Development Program of Shandong ; Science and Technology Service Network Program of Chinese Academy of Sciences ; ZheJiang MEY Membrane Technology CO.,LTD.
WOS IDWOS:000722088800005
PublisherELSEVIER
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/51117
Collection中国科学院过程工程研究所
Corresponding AuthorLuo, Jianquan
Affiliation1.Univ Chinese Acad Sci, Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China
2.Zhengzhou Univ, Sch Chem Engn & Energy, Zhengzhou 450001, Peoples R China
Recommended Citation
GB/T 7714
Ren, Yuling,Zhu, Junyong,Feng, Shichao,et al. Tuning pore size and surface charge of poly(piperazinamide) nanofiltration membrane by enhanced chemical cleaning treatment[J]. JOURNAL OF MEMBRANE SCIENCE,2022,643:11.
APA Ren, Yuling,Zhu, Junyong,Feng, Shichao,Chen, Xiangrong,Luo, Jianquan,&Wan, Yinhua.(2022).Tuning pore size and surface charge of poly(piperazinamide) nanofiltration membrane by enhanced chemical cleaning treatment.JOURNAL OF MEMBRANE SCIENCE,643,11.
MLA Ren, Yuling,et al."Tuning pore size and surface charge of poly(piperazinamide) nanofiltration membrane by enhanced chemical cleaning treatment".JOURNAL OF MEMBRANE SCIENCE 643(2022):11.
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