Abstract
In order to obtain a good stability of micro-encapsulated phase change suspension, then study its rheological properties, herein formulated a phase change micro-capsulated suspension and utilized isopropanol/water mixed solution as the base fluid. The particle size distribution, viscosity and rheological properties of micro-encapsulated phase change suspension were measured at different concentrations. The effects of mass fraction, temperature on viscosity were discussed. Based on the classic viscosity formula, a correction factor was introduced to get higher precision viscosity formula. The results show that: a volume ratio of 1:1.75 of isopropanol/water suspension, suspension stability is up to 48h. It is also found that the viscosity decreases with the increase of temperature, but it increases with the increases of mass concentration. The fitted Tomas viscosity formula is reliable when the volume concentration is less than 15.58%, the error could be controlled within 5.7%.
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