Environmental Friendly Fabrication of Porous Cement Membranes via Reusable Camphene-Based Freeze-Casting Method
Inorganic membranes have been developed rapidly in recent years because of excellent anti-fouling performance, high mechanical strength and outstanding resistances to acid and alkali. However, the high production cost still restricts its large-scale industrial application. In this work, an environme...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-09-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/12/9/867 |
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| author | Zhen Wang Xiaojuan Wang Zhantong Sun Xiaofeng Wang Hongdong Wang Congjie Gao Xueli Gao |
| author_facet | Zhen Wang Xiaojuan Wang Zhantong Sun Xiaofeng Wang Hongdong Wang Congjie Gao Xueli Gao |
| author_sort | Zhen Wang |
| collection | DOAJ |
| description | Inorganic membranes have been developed rapidly in recent years because of excellent anti-fouling performance, high mechanical strength and outstanding resistances to acid and alkali. However, the high production cost still restricts its large-scale industrial application. In this work, an environmental friendly unidirectional freezing method via introducing camphene as a reusable template was adapted to prepare porous cement membranes (PCMs). The naturally formed and highly aligned porous structures of PCMs could be divided into three parts: a dense layer, a transition layer and a supporting layer. With the solid content rising from 40 wt.% to 60 wt.%, the pore size of the PCMs decreased from 3.34 nm to 3.62 nm, the bovine serum albumin (BSA) rejection increased from 81.3% to 93.5% and water flux decreased from 346.8 L·m<sup>−2</sup>·h<sup>−1</sup> to 167.3 L·m<sup>−2</sup>·h<sup>−1</sup> (0.2 MPa). Significantly, the performance of PCMs was maintained; even the camphene was reused 20 times. Additionally, the recovery rate of camphene could be reached up to 97.16%. Therefore, this method is cost effective and environmental friendly, which endowed the PCMs great potential in water treatment. |
| first_indexed | 2024-03-09T23:12:14Z |
| format | Article |
| id | doaj.art-e922fede6e14444f922328fa01c277c2 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-09T23:12:14Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-e922fede6e14444f922328fa01c277c22023-11-23T17:42:42ZengMDPI AGMembranes2077-03752022-09-0112986710.3390/membranes12090867Environmental Friendly Fabrication of Porous Cement Membranes via Reusable Camphene-Based Freeze-Casting MethodZhen Wang0Xiaojuan Wang1Zhantong Sun2Xiaofeng Wang3Hongdong Wang4Congjie Gao5Xueli Gao6Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, ChinaFrontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, ChinaFrontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, ChinaSEPCOIII Electric Power Construction Co., Ltd., Qingdao 266100, ChinaSEPCOIII Electric Power Construction Co., Ltd., Qingdao 266100, ChinaFrontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, ChinaFrontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, ChinaInorganic membranes have been developed rapidly in recent years because of excellent anti-fouling performance, high mechanical strength and outstanding resistances to acid and alkali. However, the high production cost still restricts its large-scale industrial application. In this work, an environmental friendly unidirectional freezing method via introducing camphene as a reusable template was adapted to prepare porous cement membranes (PCMs). The naturally formed and highly aligned porous structures of PCMs could be divided into three parts: a dense layer, a transition layer and a supporting layer. With the solid content rising from 40 wt.% to 60 wt.%, the pore size of the PCMs decreased from 3.34 nm to 3.62 nm, the bovine serum albumin (BSA) rejection increased from 81.3% to 93.5% and water flux decreased from 346.8 L·m<sup>−2</sup>·h<sup>−1</sup> to 167.3 L·m<sup>−2</sup>·h<sup>−1</sup> (0.2 MPa). Significantly, the performance of PCMs was maintained; even the camphene was reused 20 times. Additionally, the recovery rate of camphene could be reached up to 97.16%. Therefore, this method is cost effective and environmental friendly, which endowed the PCMs great potential in water treatment.https://www.mdpi.com/2077-0375/12/9/867porous cement membraneseparation performancecamphenefreeze castingreusable |
| spellingShingle | Zhen Wang Xiaojuan Wang Zhantong Sun Xiaofeng Wang Hongdong Wang Congjie Gao Xueli Gao Environmental Friendly Fabrication of Porous Cement Membranes via Reusable Camphene-Based Freeze-Casting Method Membranes porous cement membrane separation performance camphene freeze casting reusable |
| title | Environmental Friendly Fabrication of Porous Cement Membranes via Reusable Camphene-Based Freeze-Casting Method |
| title_full | Environmental Friendly Fabrication of Porous Cement Membranes via Reusable Camphene-Based Freeze-Casting Method |
| title_fullStr | Environmental Friendly Fabrication of Porous Cement Membranes via Reusable Camphene-Based Freeze-Casting Method |
| title_full_unstemmed | Environmental Friendly Fabrication of Porous Cement Membranes via Reusable Camphene-Based Freeze-Casting Method |
| title_short | Environmental Friendly Fabrication of Porous Cement Membranes via Reusable Camphene-Based Freeze-Casting Method |
| title_sort | environmental friendly fabrication of porous cement membranes via reusable camphene based freeze casting method |
| topic | porous cement membrane separation performance camphene freeze casting reusable |
| url | https://www.mdpi.com/2077-0375/12/9/867 |
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