materials

Homemade Silica Aerogel

Homemade Silica Aerogel

Aerogels are fascinating materials, with lots of interesting and, frankly, amazing properties, but they are not easy to make. These days, industrial manufacture with an eye towards commercial applications, primarily as thermal insulators, is bringing the price down some, at least for granules, but larger pieces still cost around $50 US per cubic inch. Ben Krasnow, impressively, has made his own…

What Carbonated Acrylic Plastic Looks Like

What Carbonated Acrylic Plastic Looks Like

As I wrote about a month ago, one of the many unusual phenomena Ben Krasnow has produced in his garage is supercritical CO2. As you may recall, Ben machined a custom acrylic pressure vessel so he could get (and give) a good look at a state of matter that most of us have little experience of. Since then Ben has inadvertently had a chance to observe another extremely unusual effect: the carbonation of solid acrylic.