Sustainable fabrication of chitosan membranes with optimized performance for ultrafiltration

Liu, Xin1,2; Zou, Zhujun1; Wang, Dong1; Du, Dongyu1; Li, Zhuo1; Li, Weiyi1,2

2024-02-01

10.1016/j.seppur.2023.125276

SEPARATION AND PURIFICATION TECHNOLOGY   影响因子和分区

1383-5866

1873-3794

A key to the sustainable development of membrane technology is the green fabrication of biopolymer membranes, whose filtration performance is comparable to that made from petroleum-based polymers. In this study, chitosan membranes were fabricated via wet precipitation of the alkaline dope; both the composition and temperature of the coagulation bath were regulated to optimize the filtration performance for ultrafiltration. It is revealed by comparing the morphological characterization with the filtration-performance evaluation that the use of pure ethanol as the coagulant at a subzero temperature would be in favor of the formation of a laminated substructure, which can enhance the water permeance not at the cost of decreasing the rejection of micron-sized particles and macromolecules. Optical coherence tomography (OCT) was employed to in-situ characterize the film formation in an effort to understand how the variation in coagulating conditions could change the geometrical and topological characteristics of the resulting membrane. The OCT-based characterization highlights the key role of the Liesegang phenomenon in forming the hierarchical substructures, while resolving the synergistic effects emanating from the ethanol-induced film shrinkage and the structural preservation in the subzero environment.

Chitosan membranes Coagulating conditions Hierarchical substructures Film-formation kinetics Optical coherence tomography

SCI ; EI

英语

第一 ; 通讯

Guangdong Basic and Applied Basic Research Foundation[2021A1515110278] ; Program for Guangdong Introducing Innovative and Entrepreneurial Teams[2017ZT07Z479] ; National Natural Science Foundation of China[21878140] ; Shenzhen Science and Technology Innovation Committee[JCYJ20190809172011680]

Engineering

Engineering, Chemical

WOS:001091799500001

ELSEVIER

20234114860181

Biopolymers ; Chitosan ; Coagulation ; Fabrication ; Microfiltration ; Optical tomography ; Sustainable development ; Ultrafiltration ; Water filtration

Water Treatment Techniques:445.1 ; Biological Materials and Tissue Engineering:461.2 ; Optical Devices and Systems:741.3 ; Chemical Operations:802.3 ; Organic Compounds:804.1 ; Polymeric Materials:815.1

CHEMISTRY

2-s2.0-85173548211

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, 1088 Xueyuan Rd, Shenzhen, Guangdong, Peoples R China

Liu, Xin,Zou, Zhujun,Wang, Dong,et al. Sustainable fabrication of chitosan membranes with optimized performance for ultrafiltration[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2024,330.

Liu, Xin,Zou, Zhujun,Wang, Dong,Du, Dongyu,Li, Zhuo,&Li, Weiyi.(2024).Sustainable fabrication of chitosan membranes with optimized performance for ultrafiltration.SEPARATION AND PURIFICATION TECHNOLOGY,330.

Liu, Xin,et al."Sustainable fabrication of chitosan membranes with optimized performance for ultrafiltration".SEPARATION AND PURIFICATION TECHNOLOGY 330(2024).