PDMS microparticles produced in PDMS microchannels under the jetting regime for optimal optical suspensions

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Jorge Carneiro (Author) Other; João B. L. M. Campos (Author) FEUP; João M. Miranda (Author) Other

Journal

Title: Colloids and Surfaces A: Physicochemical and Engineering Aspects

Vol. 580

Pages: 1-8

ISSN: 0927-7757

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 2 Citations

Other information

Authenticus ID: P-00Q-Y53

DOI: 10.1016/j.colsurfa.2019.123737

Abstract (EN): This study reports the generation and characterization of polydimethylsiloxane (PDMS) microparticles. Droplets are produced in the jetting regime by hydrodynamic flow focusing technique in a PDMS square-section microchannel and afterwards thermally cured. Both the droplets and microparticles size distributions are characterized and compared. During the curing process, there is no appreciable shrinking of the droplets/microparticles. Droplets are generated with a maximum frequency of 1.3 kHz and their diameter ranges from 27 to 59 mu m depending on the flow rate ratio. After the cure, the microparticles are chemically and optically characterized. The results show that the droplet generation method and the curing process are able to produce PDMS microparticles with low size, low dispersity and optimal optical properties for visualization and velocimetry experiments.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8