Semipermeable elastic microcapsules for gas capture and sensing
| dc.contributor.author | Nabavi, Seyed Ali | |
| dc.contributor.author | Vladisavljević, G. | |
| dc.contributor.author | Gu, Sai | |
| dc.contributor.author | Manovic, Vasilije | |
| dc.date.accessioned | 2016-11-29T09:20:00Z | |
| dc.date.available | 2016-11-29T09:20:00Z | |
| dc.date.issued | 2016-09-03 | |
| dc.description.abstract | Monodispersed microcapsules for gas capture and sensing were developed consisting of elastic semipermeable polymer shells of tunable size and thickness and pH-sensitive, gas selective liquid cores. The microcapsules were produced using glass capillary microfluidics and continuous on-the-fly photopolymerization. The inner fluid was 5–30 wt % K2CO3 solution with m-cresol purple, the middle fluid was a UV-curable liquid silicon rubber containing 0–2 wt % Dow Corning 749 fluid, and the outer fluid was aqueous solution containing 60–70 wt % glycerol and 0.5–2 wt % stabilizer (poly(vinyl alcohol), Tween 20, or Pluronic F-127). An analytical model was developed and validated for prediction of the morphology of the capsules under osmotic stress based on the shell properties and the osmolarity of the storage and core solutions. The minimum energy density and UV light irradiance needed to achieve complete shell polymerization were 2 J·cm–2 and 13.8 mW·cm–2, respectively. After UV exposure, the curing time for capsules containing 0.5 wt % Dow Corning 749 fluid in the middle phase was 30–40 min. The CO2 capture capacity of 30 wt % K2CO3 capsules was 1.6–2 mmol/g depending on the capsule size and shell thickness. A cavitation bubble was observed in the core when the internal water was abruptly removed by capillary suction, whereas a gradual evaporation of internal water led to buckling of the shell. The shell was characterized using TGA, DSC, and FTIR. The shell degradation temperature was 450–460 °C. | en_UK |
| dc.identifier.citation | Nabavi S, Vladisavljević G, Gu S, Manović V, Semipermeable elastic microcapsules for gas capture and sensing, Langmuir, Volume 32, Issue 38, pages 9826 – 9835. | en_UK |
| dc.identifier.cris | 15460089 | |
| dc.identifier.issn | 0743-7463 | |
| dc.identifier.uri | http://dx.doi.org/10.1021/acs.langmuir.6b02420 | |
| dc.identifier.uri | http://dspace.lib.cranfield.ac.uk/handle/1826/11042 | |
| dc.language.iso | en | en_UK |
| dc.publisher | American Chemical Society | en_UK |
| dc.rights | The information from the CC webpage for CC:BY:NC: Attribution-Non-Commercial 3.0 Unported (CC BY-NC 3.0) You are free to: Share — copy and redistribute the material in any medium or format, Adapt — remix, transform, and build upon the material. The licensor cannot revoke these freedoms as long as you follow the license terms. Under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Information: Non-Commercial — You may not use the material for commercial purposes. No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits. | |
| dc.title | Semipermeable elastic microcapsules for gas capture and sensing | en_UK |
| dc.type | Article | en_UK |