Abstract
Chloroprene rubber is a high performance elastomer with remarkable ageing, heat and oil resistance. A new class of elastomeric nanocomposite was prepared by incorporating reduced graphene oxide (RGO) into chloroprene rubber (CR). RGO is synthesised from natural graphite, through GO route via Hummer’s method. This paper focuses on the influence of reduced graphene oxide on chloroprene rubber based elastomeric composites and their pervaporation separation of azeotropic liquid mixtures. The effect of concentration of RGO on separation factor, pervaporation separation index (PSI) and flux of the membranes were analysed. Chloroprene loaded with 0.9 phr (parts per hundred rubber) RGO shows an improved permeation rate among all other membranes while chloroform/acetone (80/20) azeotropic liquid mixture was used as feed solution. Flux increases with increasing the concentration of filler, reaches an optimum value and then decreases. Interestingly PSI also shows similar trend.
Highlights
Membrane based separation technology is one of the widely used technique for purification, concentration and separation of fluid mixtures
The pervaporation properties of PVA/PVP blend membranes crosslinked by gluteraldehyde and a water soluble diazo compound (DAS) in the separation of ethanol-water mixture was reported by Hu and co-workers [19]
It is evident from the figure that, in the X-ray diffraction (XRD) of reduced graphene oxide (RGO) there is strong and sharp diffraction peak at 2 = 24.7o corresponds to an interlayer distance of 3.4 nm; the diffraction peak of pure RGO is disappeared from all chloroprene rubber (CR)/RGO composites [26]
Summary
Membrane based separation technology is one of the widely used technique for purification, concentration and separation of fluid mixtures. The selection of polymer blend membrane as a novel material for the pervaporation separation process is worth probing one. Silicone rubber membranes were prepared for the pervaporation studies by Uragami and Shinomia [18] and they observed higher selectivity during separation process. The pervaporation properties of PVA/PVP blend membranes crosslinked by gluteraldehyde and a water soluble diazo compound (DAS) in the separation of ethanol-water mixture was reported by Hu and co-workers [19]. The use of polychloroprene rubber based nanocomposite membranes in separation process is very few. To the best of our knowledge, the use of chloroprene rubber/RGO membranes for pervaporation separation process has not yet been reported. The main goal and novelty of our work is to prepare chloroprene/RGO composite membranes and to examine the pervaporation performance using chloroform- acetone (80/20) azeotropic liquid mixture. The separation efficiency of the membrane has been evaluated as a function of concentration of RGO
Sign-in/Register to view highlights & summary 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.
