Seminar"Drying colloidal films, from a liquid dispersion to a rigid coating"Lucas Goehring

Micro/Bio/Nanofluidics (Shen) Unit would like to invite you to the seminar by Prof. Lucas Goehring on April 30 (Tuesday).
 
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Date:   April 30, 2024
Time:  15:00-16:00
Venue: B503, OIST
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Speaker:

Lucas Goehring
Professor
Physics and Maths
Nottingham Trent University, UK

Title:

Drying colloidal films, from a liquid dispersion to a rigid coating

Abstract:

Colloidal dispersions are the basis of diverse types of coatings including paints, varnishes, foodstuffs, cosmetics and medical materials.  These are prepared as complex mixtures of different phases of matter, such as nanoscopic particles, polymers and emulsions, dispersed in a liquid, applied to a surface and then dried.  As they dry into a film, these materials also pass rapidly through intermediate states, like gels or glasses, which help determine the structure of the final product.  In this presentation I will walk through the key stages of how a dispersion dries.  By identifying the processes that are active during the key stages of drying, I will show how we can understand and control how a drying film or coating solidifies.  I will then turn to look at the properties of the solid product itself, and how drying can lead to mechanical instabilities like fracture, shear banding and peeling, and how such undesirable effects can be minimised.

Host:
Prof. Amy Shen