Alfredo Mateus is apparently pretty cool - or at least has some pretty cool ideas.
Through the Prezi above first, largely without words...
- The bottle tops - hacksawed off just below the screw top collar - become flexible in hot water and can be turned into keychains. The distorted bottle tops then can show the thermoplasticity when returned to hot water.
- The inflation of the preforms is a bit trickier, and the method hinted at in the Prezi is far tougher to pull off. Check out my other post about a way to successfully inflate the preforms.
- Carving a can with chemistry is a variation on the aluminum can demo using a solution of either sodium hydroxide or copper (II) sulfate to react away the aluminum can. Here Mateus has used this to produce some nice lights.
- The hydrophobic toys need a whole lot more explanation. The carbon compounds in soot are apparently hydrophobic and can make for a very cool 'maze' by letting the droplets roll around rather freely.
- The PET molecules, though, are pretty spectacular, and they're the ones I desperately want to recreate for my classroom. I just need to figure out how to throw around a few pop rivets. And sadly, they're the only ones that are NOT covered in the related pdf of instructions.
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