Fabricating PVDF hollow fiber microfiltration membrane with a tenon-connection structure via the thermally induced phase separation process to enhance strength and permeability

Cui, Zhenyu; Wei, Li; Zeng, Haiyi; Tang, Xiuxiu; Zhang, Jing; Qin, Shuhao; Han, Na; Li, Jianxin

doi:10.1016/j.eurpolymj.2018.12.009

Cited by 33 publications

(2 citation statements)

References 48 publications

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“…Due to high thermal, chemical and mechanical stability, the most used membrane matrix materials are ceramic ( Zhang et al, 2020 ) and polymeric, such as polyvinyl fluoride (PVDF) ( Cui et al, 2019 ), polytetrafluoroethylene (PTFE) ( Feng et al, 2018 ) and polyaniline (PANI) ( Vijayakumar and Khastgir, 2018 ). Nanocomposite membranes can be prepared by nanoparticles surface coating ( Figure 6A ) or entrapping nanoparticles thru blending with the membrane substrate during the manufacturing process ( Figure 6B ), or even as a free-standing catalyst ( Homocianu and Pascariu, 2022 ).…”

Section: Nanomaterials For Water Cleaning Nanotechnologiesmentioning

confidence: 99%

Colloidal nanomaterials for water quality improvement and monitoring

et al. 2022

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Water is the most important resource for all kind forms of live. It is a vital resource distributed unequally across different regions of the globe, with populations already living with water scarcity, a situation that is spreading due to the impact of climate change. The reversal of this tendency and the mitigation of its disastrous consequences is a global challenge posed to Humanity, with the scientific community assuming a major obligation for providing solutions based on scientific knowledge. This article reviews literature concerning the development of nanomaterials for water purification technologies, including collaborative scientific research carried out in our laboratory (nanoLAB@UA) framed by the general activities carried out at the CICECO-Aveiro Institute of Materials. Our research carried out in this specific context has been mainly focused on the synthesis and surface chemical modification of nanomaterials, typically of a colloidal nature, as well as on the evaluation of the relevant properties that arise from the envisaged applications of the materials. As such, the research reviewed here has been guided along three thematic lines: 1) magnetic nanosorbents for water treatment technologies, namely by using biocomposites and graphite-like nanoplatelets; 2) nanocomposites for photocatalysis (e.g., TiO2/Fe3O4 and POM supported graphene oxide photocatalysts; photoactive membranes) and 3) nanostructured substrates for contaminant detection using surface enhanced Raman scattering (SERS), namely polymers loaded with Ag/Au colloids and magneto-plasmonic nanostructures. This research is motivated by the firm believe that these nanomaterials have potential for contributing to the solution of environmental problems and, conversely, will not be part of the problem. Therefore, assessment of the impact of nanoengineered materials on eco-systems is important and research in this area has also been developed by collaborative projects involving experts in nanotoxicity. The above topics are reviewed here by presenting a brief conceptual framework together with illustrative case studies, in some cases with original research results, mainly focusing on the chemistry of the nanomaterials investigated for target applications. Finally, near-future developments in this research area are put in perspective, forecasting realistic solutions for the application of colloidal nanoparticles in water cleaning technologies.

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Section: Nanomaterials For Water Cleaning Nanotechnologiesmentioning

confidence: 99%

Colloidal nanomaterials for water quality improvement and monitoring

et al. 2022

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“…Among all fluoroplastics, it ranks in second position in terms of production volume [ 6 , 7 , 8 , 9 , 10 , 11 ]. Selective solubility of PVDF in such common solvents as N-methyl-2-pyrrolidone (NMP), N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), and N,N-dimethylacetamide (DMAc) [ 12 ] makes it possible to obtain membranes by the traditional phase inversion in solutions, namely thermally-induced phase separation (TIPS) and non-solvent-induced phase separation (NIPS) [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Polyvinylidene Fluoride Membrane Production Conditions on Its Structure and Performance Characteristics

et al. 2022

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Poly (vinylidene fluoride) membranes were prepared by freeze-casting. The effects of PVDF concentration, and freezing temperature on the morphology, crystallization, and performance of prepared membranes were examined. Polymer concentration was varied from 10 to 25 wt%. The freezing temperature was varied from −5 to −25 °C. Dimethyl sulfoxide (DMSO) and distilled water were used as solvents and non-solvents, respectively. The first step of this study was devoted to estimating the optimal concentration of PVDF solution in DMSO. Membranes prepared at different ratios were characterized using physical and mechanical characteristics and porosity. The second step was to optimize the time required for the production of the membranes. In the third step, it was shown that the freezing temperature had a remarkable effect on the morphology of the membranes: as the temperature decreases, there is a transition from spherulite structures to interconnected pores. It was shown that the diversity in the pore pattern for PVDF affects remarkably the water permeability through the polymer membrane. During the monitoring of the spread of crystallized areas during the formation of the membrane, it was found that the crystallization of the solvent begins at localized points of the microscale, further crystallized areas spread radially or unevenly along the surface of the solution, forming contact borders, which can lead to changes in the properties of the membrane in its area.

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Vinyl‐Based Polymers

2019

The Chemistry of Bio‐based Polymers

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Fabricating PVDF hollow fiber microfiltration membrane with a tenon-connection structure via the thermally induced phase separation process to enhance strength and permeability

Cited by 33 publications

References 48 publications

Colloidal nanomaterials for water quality improvement and monitoring

Colloidal nanomaterials for water quality improvement and monitoring

Effect of Polyvinylidene Fluoride Membrane Production Conditions on Its Structure and Performance Characteristics

Vinyl‐Based Polymers

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