Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 161, Issue 1, Pages 982-988Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2011.11.079
Keywords
Polydimethylsiloxane (PDMS); Carbon black (CB); Nanocomposite membrane; Hydrogen (H-2); Methane (CH4); Selectivity; Separation; FTIR; Raman
Funding
- Saudi Arabian Ministry of Higher Education
- Australian Research Council [DP1092717, DP110100262, LE100100215]
- Australian Research Council [LE100100215] Funding Source: Australian Research Council
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Polydimethylsiloxane (PDMS) composites containing variable weight amounts of carbon black (CB) have been synthesized as membranes to evaluate the effect of CB concentration on gas selectivity and separation. The membranes were used in conjunction with a commercial semiconducting methane (CH4) gas sensor that had a strong cross-talk with hydrogen (H-2) gas. The selectivity of the CB-PDMS composite membranes for gas separation was tested using CH4 and H-2. It was found that at 6 wt% of CB in PDMS, the permeability of CH4 was significantly and selectively attenuated through the composite membrane. This work demonstrates that CB is an effective additive for tuning H-2/CH4 gas selectivity of the composite membranes. The selectivity is attributed to a chemical transition occurring with increasing CB doping, which was observed by vibrational spectroscopy measurements. (C) 2011 Elsevier RV. All rights reserved.
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