Structures and Physical Properties of Multi-Walled Carbon Nanotube-Filled PVDF Thermoplastic Composites

Chae, Dong Wook; Nam, Young Wan; Hwang, Seung Sang; Hong, S.M.

doi:10.4028/3-908451-31-0.1117

Cited by 2 publications

(3 citation statements)

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“…The DSC thermograms indicate that the incorporation of CeO 2 in the polymer matrix has a direct influence on the melting temperature of CTA, increasing the melting temperature of the composites. The melting temperature of the composite appears at a higher temperature as compared to the pristine membrane, which is attributed to the good dispersion of CeO 2 within the CTA matrix [ 50 ].…”

Section: Resultsmentioning

confidence: 99%

CeO2-Blended Cellulose Triacetate Mixed-Matrix Membranes for Selective CO2 Separation

et al. 2021

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Due to the high affinity of ceria (CeO2) towards carbon dioxide (CO2) and the high thermal and mechanical properties of cellulose triacetate (CTA) polymer, mixed-matrix CTA-CeO2 membranes were fabricated. A facile solution-casting method was used for the fabrication process. CeO2 nanoparticles at concentrations of 0.32, 0.64 and 0.9 wt.% were incorporated into the CTA matrix. The physico-chemical properties of the membranes were evaluated by SEM-EDS, XRD, FTIR, TGA, DSC and strain-stress analysis. Gas sorption and permeation affinity were evaluated using different single gases. The CTA-CeO2 (0.64) membrane matrix showed a high affinity towards CO2 sorption. Almost complete saturation of CeO2 nanoparticles with CO2 was observed, even at low pressure. Embedding CeO2 nanoparticles led to increased gas permeability compared to pristine CTA. The highest gas permeabilities were achieved with 0.64 wt.%, with a threefold increase in CO2 permeability as compared to pristine CTA membranes. Unwanted aggregation of the filler nanoparticles was observed at a 0.9 wt.% concentration of CeO2 and was reflected in decreased gas permeability compared to lower filler loadings with homogenous filler distributions. The determined gas selectivity was in the order CO2/CH4 > CO2/N2 > O2/N2 > H2/CO2 and suggests the potential of CTA-CeO2 membranes for CO2 separation in flue/biogas applications.

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Section: Resultsmentioning

confidence: 99%

CeO2-Blended Cellulose Triacetate Mixed-Matrix Membranes for Selective CO2 Separation

et al. 2021

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“…The DSC spectra, melting temperature, and enthalpy of fusion of the pristine CTA were reported in our previous work [79]. Compared to pristine CTA (melting temperature of 289 • C), incorporating inorganic fillers (TNT/CNT) into the polymer matrix increases the melting temperature to 300 • C. This increase in the melting temperature could be attributed to the good dispersion of the fillers into the polymer matrix [80]. The polymer crystallinity and thermal behavior of the MMMs was evaluated by the DSC technique by quantifying the heat dissociated with fusion of the polymer.…”

Section: Physico-chemical Property Evaluationmentioning

confidence: 74%

“…Compared to pristine CTA (melting temperature of 289 °C), incorporating inorganic fillers (TNT/CNT) into the polymer matrix increases the melting temperature to 300 °C. This increase in the melting temperature could be attributed to the good dispersion of the fillers into the polymer matrix [80]. The degree of crystallinity was evaluated from the melting enthalpy in the first scan of each sample.…”

Section: Physico-chemical Property Evaluationmentioning

confidence: 99%

CO2/CH4 and H2/CH4 Gas Separation Performance of CTA-TNT@CNT Hybrid Mixed Matrix Membranes

et al. 2021

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This study explored the underlying synergy between titanium dioxide nanotube (TNT) and carbon nanotube (CNT) hybrid fillers in cellulose triacetate (CTA)-based mixed matrix membranes (MMMs) for natural gas purification. The CNT@TNT hybrid nanofillers were blended with CTA polymer and cast as a thin film by a facile casting technique, after which they were used for single gas separation. The hybrid filler-based membrane depicted a higher CO2 uptake affinity than the single filler (CNT/TNT)-based membrane. The gas separation results indicate that the hybrid fillers (TNT@CNT) are strongly selective for CO2 over CH4 and H2 over CH4. The increment in the CO2/CH4 and H2/CH4 selectivities compared to the pristine CTA membrane was 42.98 from 25.08 and 48.43 from 36.58, respectively. Similarly, the CO2 and H2 permeability of the CTA-TNT@CNT membrane increased by six- and five-fold, respectively, compared to the pristine CTA membrane. Such significant improvements in CO2/CH4 and H2/CH4 separation performance and thermal and mechanical properties suggest a feasible and practical approach for potential biogas upgrading and natural gas purification.

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Structures and Physical Properties of Multi-Walled Carbon Nanotube-Filled PVDF Thermoplastic Composites

Cited by 2 publications

References 0 publications

CeO2-Blended Cellulose Triacetate Mixed-Matrix Membranes for Selective CO2 Separation

CeO2-Blended Cellulose Triacetate Mixed-Matrix Membranes for Selective CO2 Separation

CO2/CH4 and H2/CH4 Gas Separation Performance of CTA-TNT@CNT Hybrid Mixed Matrix Membranes

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