Controlled Shape and Porosity of Polymeric Colloids by Photo-Induced Phase Separation.

ABSTRACT: The shape and porosity of polymeric colloids are two properties that highly influence their ability to accomplish specific tasks. For micro-sized colloids, the control of both properties was demonstrated by the photo-induced phase separation of droplets of NOA81-a thiol-ene based UV-curable adhesive-mixed with acetone, water, and polyethylene glycol. The continuous phase was perfluoromethyldecalin, which does not promote phase separation prior to UV activation. A profound influence of the polymer concentration on the particle shape was observed. As the photo-induced phase separation is triggered by UV radiation, polymerization drives the extracted solution out of the polymeric matrix. The droplets of the extracted solution coalesce until they form a dimple correlated to the polymer concent

SUBMITTER: Hadad E 

PROVIDER: S-EPMC6680483 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature