Temperature-controlled ‘breathing’ of carbon dioxide bubbles†
Abstract
We report a microfluidic (MF) approach to studies of temperature mediated carbon dioxide (CO2) transfer between the gas and the liquid phases. Micrometre-diameter CO2 bubbles with a narrow size distribution were generated in an aqueous or organic liquid and subsequently were subjected to temperature changes in the downstream channel. In response to the cooling-heating-cooling cycle the bubbles underwent corresponding contraction-expansion-contraction transitions, which we term ‘bubble breathing’. We examined temperature-controlled dissolution of CO2 in four exemplary liquid systems: deionized