Abstract
In this study, poly(vinylidene fluoride- co-hexafluoropropene) (P(VDF- co-HFP)) was firstly used as a membrane material in organophilic pervporation for aroma compounds’ recovery. Separation and transport properties of P(VDF- co-HFP) coated polypropene (PP) composite membrane in pervaporation of EtAc–water mixture were investigated. The effects of two process conditions (EtAc feed concentration and operating temperature) on pervaporation parameters (permeation flux and separation factor) were discussed in detail. The study shows that acetone-fabricated membranes have excellent mechanical strength, thermal stability and film-forming properties. In addition, they have ideal pervaporation performances compared to commonly used poly(dimethylsixolane) (PDMS) membrane and poly (ether block amide) (PEBA) membrane. Its separation factor is higher than that of PEBA membrane but lower that of PDMS membrane. The permeate flux is relatively high, which depends on not only the nature of the given membrane material but also the membrane-formed special structure and morphology. Mass transports in the membrane were investigated based on the change of microstructure from DSC analysis during the swelling process. The activation energies for permeation of water ( E P,W) and EtAc ( E P,E) calculated from the slopes of Arrhenius plots of ln( J) versus 1/ T were employed to explain the diffusion process. In general, the sorption process dominates the separation mechanism.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
