Proteinaceous bubble and nanoparticle flows in microchannels

초록

Proteinaceous bubbles of 185 nm average diameter were synthesized by a sonochemical treatment of bovine serum albumin (BSA) in an aqueous solution and the nanoparticles (TiO2) solution was made by ultrasonic irradiation. To study the macroscopic flow behavior associated with the changes in the state of the microparticles, a flow test of these solutions in microchannels was done. Also, the size distributions of the proteinaceous bubbles in solution before and after the flow test were measured by a light scattering method. Test results show that the air-filled proteinaceous bubbles in solution adjust their size to reduce the shear stress encountered in the flow through the microchannel. On the other hand, the mass flow rate of the solution with nanoparticle suspensions becomes smaller than that of deionized water in a microchannel of dimension 100 x 100 mu m(2).

키워드