Bill reveals the stunning engineering underlying the design of a diaper. He describes the five layers of a diaper, including the superabsorbent polymer in the diaper's core. He illustrates the action of this polymer with a stunning demonstration using a single bead of polymer: it soaks up enough water to grow from a diameter of 4 mm to nearly a half inch.
You can bundle watch Bill's videos using this playlist:
If you are interested in mechanical computers you'll likely enjoy his series on Albert Michelson's Harmonic Analyzer -- a 19th century machine that calculates Fourier transforms:
Creative Commons Images Used in Video
First cotton image is by dotlizard
The cotton candy image is from Stefano Mortellaro
Tagged under: diaper,disposable diaper,engineering,polymer science,Bill Hammack,Engineer Guy,University Illinois - Urbana,Chemical Engineering
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