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How To Make A Bioplastic In Your Kitchen

July 16, 2016 2 min read

Uncle Cecil is sharing how to make a bioplastic using your microwave in this kitchen science activity!

Our summer science fun continues! Today the Prez and I are going to share with you how to make a simple bioplastic in your microwave!!

What is a bioplastic you ask? It's a plasticky material made from biological chemicals - clear as muddy water?

Now, we can't exactly make a completely hard bioplastic in our microwave. That would require a few more steps and processes that you probably don't have the ability to do in your kitchen.

However, we will make a super cool gel-like plastic using cornstarch and a few other items.

Let's get started...

How To Make A Bioplastic In Your Kitchen

What you need

  • Cornstarch
  • Water
  • Vegetable Oil
  • Plastic baggie
  • Food coloring (optional)

What to do

Step 1 - Begin by adding equal parts of cornstarch and water, about a cup of each, into your baggie.

Step 2 - Next, add a teaspoon of vegetable oil and a few drops of food coloring if you want.

Step 3 - Then, seal the baggie well. And mix, mash, and massage the baggie until everything is mixed well.

Step 4 - Open a corner of the baggie, so it can vent, place it on a plate, and set it in the microwave. Cook your baggie for about 25 seconds on high.

Step 5 - Wait about a minute or so for the baggie to cool.

Step 6 - Once, the baggie is cool to the touch, remove your cornstarch plastic and mold it into whatever you like!!

Mix cornstarch, water, and oil to make this microwaveable bioplastic! Don't miss this magical science activity for chemistry!

What Happened

Plastic is a polymer, which is basically a long-chained molecule. In the baggie, the molecules in the cornstarch and oil are being broken apart by the heat. Then, they combine and form into the super-long chains of a polymer.

Wrapping it Up

Wasn’t that superiffic?

We’d love to see the bioplastic creations you make – post a pic on Instagram and tag it with #SassySci (or @sassafrassci bioplastic) and the Prez and I will check it out!


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