1
|
Buoyant and durable oil/water separation mesh for continuous and efficient collection of both oil slick and underwater oil leakage. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.115795] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
2
|
Li M, Brant JA. Effects of aluminogermanate imogolite nanotube orientation on mass transport across polyamide nanocomposite membranes. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.05.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
3
|
Synthesis and Characterization of a High Flux Nanocellulose-Cellulose Acetate Nanocomposite Membrane. MEMBRANES 2019; 9:membranes9060070. [PMID: 31174312 PMCID: PMC6630560 DOI: 10.3390/membranes9060070] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 06/01/2019] [Accepted: 06/04/2019] [Indexed: 11/16/2022]
Abstract
Despite the advantages of membrane processes, their high energy requirement remains a major challenge. Fabrication of nanocomposite membranes by incorporating various nanomaterials in the polymer matrix has shown promise for enhancing membrane flux. In this study, we embed functionalized cellulose nanofibers (CNFs) with high aspect ratios in the polymer matrix to create hydrophilic nanochannels that reduce membrane resistance and facilitate the facile transport of water molecules through the membrane. The results showed that the incorporation of 0.1 wt % CNF into the polymer matrix did not change the membrane flux (~15 L · m - 2 · h - 1 ) and Bovine Serum Albumin (BSA) Fraction V rejection, while increasing the CNF content to 0.3 wt % significantly enhanced the flux by seven times to ~100 L · m - 2 · h - 1 , but the rejection was decreased to 60-70%. Such a change in membrane performance was due to the formation of hydrophilic nanochannels by the incorporation of CNF (corroborated by the SEM images), decreasing the membrane resistance, and thus enhancing the flux. When the concentration of the CNF in the membrane matrix was further increased to 0.6 wt %, no further increase in the membrane flux was observed, however, the BSA rejection was found to increase to 85%. Such an increase in the rejection was related to the electrostatic repulsion between the negatively-charged CNF-loaded nanochannels and the BSA, as demonstrated by zeta potential measurements. SEM images showed the bridging effect of the CNF in the nanochannels with high CNF contents.
Collapse
|
4
|
Shi SJ, Pan YH, Wang SF, Dai ZW, Gu L, Wu QY. Aluminosilicate Nanotubes Embedded Polyamide Thin Film Nanocomposite Forward Osmosis Membranes with Simultaneous Enhancement of Water Permeability and Selectivity. Polymers (Basel) 2019; 11:E879. [PMID: 31091763 PMCID: PMC6572521 DOI: 10.3390/polym11050879] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 05/05/2019] [Accepted: 05/08/2019] [Indexed: 11/16/2022] Open
Abstract
Nanocomposite membranes are strongly desired to break a trade-off between permeability and selectivity. This work reports new thin film nanocomposite (TFN) forward osmosis (FO) membranes by embedding aluminosilicate nanotubes (ANTs) into a polyamide (PA) rejection layer. The surface morphology and structure of the TFN FO membranes were carefully characterized by FTIR, XPS, FESEM and AFM. The ANTs incorporated PA rejection layers exhibited many open and broad "leaf-like" folds with "ridge-and-valley" structures, high surface roughness and relatively low cross-linking degree. Compared with thin film composite (TFC) membrane without ANTs, the TFN membrane with only 0.2 w/v% ANTs loading presented significantly improved FO water permeability, selectivity and reduced structural parameters. This promising performance can be mainly contributed to the special ANTs embedded PA rejection layer, where water molecules preferentially transport through the nanochannels of ANTs. Molecular dynamic simulation further proved that water molecules have much larger flux through the nanotubes of ANTs than sodium and chloride ions, which are attributed to the intrinsic hydrophilicity of ANTs and low external force for water transport. This work shows that these TFN FO membranes with ANTs decorated PA layer are promising in desalination applications due to their simultaneously enhanced permeability and selectivity.
Collapse
Affiliation(s)
- She-Ji Shi
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.
| | - Ye-Han Pan
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.
| | - Shao-Fei Wang
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.
| | - Zheng-Wei Dai
- College of Material and Textile Engineering, Jiaxing University, Jiaxing 314001, China.
| | - Lin Gu
- Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences; Ningbo 315201; China.
| | - Qing-Yun Wu
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.
| |
Collapse
|
5
|
Suckeveriene RY. Grafting of polyaniline by a dynamic inverse emulsion polymerization technique onto reverse osmosis membranes as an antibiofouling agent. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4608] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ran Y. Suckeveriene
- Department of Water Industry EngineeringKinneret Academic College Zemach Israel
| |
Collapse
|
6
|
Lange T, Charpentier T, Gobeaux F, Charton S, Testard F, Thill A. Partial Transformation of Imogolite by Decylphosphonic Acid Yields an Interface Active Composite Material. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:4068-4076. [PMID: 30793904 DOI: 10.1021/acs.langmuir.8b04242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The phosphonic acid moiety is commonly used as an anchoring group for the surface modification of imogolite. However, the impact of the reaction on its structure has never been clearly analyzed before. We study the reaction of imogolite and decylphosphonic acid by combining infrared spectroscopy, X-ray scattering, scanning electron microscopy, transmission electron microscopy, and solid-state nuclear magnetic resonance spectroscopy. Instead of a surface functionalization, we observe the formation of a lamellar phase interconnected with imogolite bundles. Although we find no evidence for grafted imogolite tubes, we observe the expected dispersion characteristics and stabilization of water in toluene emulsions described in the literature. Based on the surface chemistry of imogolite, we propose an explanation for the observed reactivity and link the structural features of the obtained composite material to its dispersibility in toluene and its observed properties at the toluene-water interface.
Collapse
Affiliation(s)
- Tobias Lange
- CEA, DEN, Research Department on Mining and Fuel Recycling Processes, SA2I , F-30207 Bagnols-sur-Cèze , France
- NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay , 91191 Gif-sur-Yvette Cedex , France
| | - Thibault Charpentier
- NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay , 91191 Gif-sur-Yvette Cedex , France
| | - Frédéric Gobeaux
- NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay , 91191 Gif-sur-Yvette Cedex , France
| | - Sophie Charton
- CEA, DEN, Research Department on Mining and Fuel Recycling Processes, SA2I , F-30207 Bagnols-sur-Cèze , France
| | - Fabienne Testard
- NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay , 91191 Gif-sur-Yvette Cedex , France
| | - Antoine Thill
- NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay , 91191 Gif-sur-Yvette Cedex , France
| |
Collapse
|
7
|
Imogolite Nanotubes: A Flexible Nanoplatform with Multipurpose Applications. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8101921] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Among a wide variety of inorganic nanotubes, imogolite nanotubes (INTs) represent a model of nanoplatforms with an untapped potential for advanced technological applications. Easily synthesized by sol-gel methods, these nanotubes are directly obtained with a monodisperse pore size. Coupled with the possibility to adjust their surface properties by using straightforward functionalization processes, INTs form a unique class of diameter-controlled nanotubes with functional interfaces. The purpose of this review is to provide the reader with an overview of the synthesis and functionalization of INTs. The properties of INTs will be stated afterwards into perspective with the recent development on their applications, in particular for polymer/INTs nanocomposites, molecular confinement or catalysis.
Collapse
|