2026-06-27T16:19:36Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/83002023-08-28T02:22:43Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Ismail, Norafiqah
author
Essalhi, Mohamed
author
Rahmati, Mahmoud
author
Cui, Zhaoliang
author
Khayet Souhaimi, Mohamed
author
Tavajohi, Naser
2023-06-17T09:09:39Z
2023-06-17T09:09:39Z
2021-03-07
1463-9262
10.1039/d1gc00122a
https://hdl.handle.net/20.500.14352/8300
https://doi.org/10.1039/d1gc00122a
https://pubs.rsc.org/
The use of highly toxic solvents presents significant risks to both the environment and human health. Therefore, the adoption of green solvents will be crucial for achieving sustainable membrane production. This work reports the use of inexpensive environmentally friendly biobased and biodegradable cyclic carbonate solvents, namely ethylene carbonate (EC), propylene carbonate (PC), and butylene carbonate (BC), to fabricate polyvinylidene fluoride (PVDF) membranes. The solvent dependence of the phase inversion mechanisms, morphology, crystalline structures, and polymorphism of the prepared PVDF membranes were investigated. Polymorph analysis revealed that membrane fabrication in EC or PC yielded exclusively the beta-phase product, whereas PVDF membrane fabrication in BC yielded a mixture of alpha and beta phase material. The mechanism of beta-phase formation was investigated using molecular dynamics simulation and shown to depend on the extent of hydrogen bonding at the polymer-solvent interface. The PVDF membrane formed in EC exhibited the highest porosity and pure water permeability, and was therefore tested in direct contact membrane distillation (DCMD), exhibiting promising results in terms of permeate flux and salt rejection. These results suggest that large-scale production of piezoelectric PVDF membranes using green solvents should be practically feasible.
eng
Atribución 3.0 España
Experimental and theoretical studies on the formation of pure beta-phase polymorphs during fabrication of polyvinylidene fluoride membranes by cyclic carbonate solvents
journal article
URL
https://docta.ucm.es/bitstreams/b8224f46-74ed-4703-9aa7-3edc4d002310/download
File
MD5
4aafb0152d907385baf02a73b58f26c9
6850600
application/pdf
Khayet124libre+CC.pdf