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Within the study of plastic, the students will cook different bioplastics with different recipes and proportions of ingredients to study the mechanical properties of the material. With a laser cutter, once they got the right material, they could design and make an object to see if it works.
The aim of this activity is to raise awareness about the use of materials in a Fab Lab and its composition by creating our own compostable bioplastic sheet following the instructions step by step. The students will be aware of the time and care that a biomaterial creation process requires.
Instruments (every 2-3 people)
A pan
A wooden spoon
A meter
A weighting scale
A teaspoon
A knife
A mixer
A 1m x 0.5m non-porous board
Ingredients (for a board)
100 gr of cornflour
50 ml of white vinegar
50 ml of vegetable glycerin
100 gr of organic waste (orange peel, lemon, watermelon, beetroot, onion, coffee grounds, etc.)
1200ml of water
Cooking bioplastics with your own organic waste. (90')
Introduction (30′)
In this session, we will present some examples of bioplastic made with different recipes. The students will touch the examples to feel their textures, thicknesses, different grades of elasticity, etc.
After that, we will laser cut a piece of bioplastic to see how this material works with that technology and to do some examples of cutting and engraving to define the parameters we could start to use.
Cutting parameters
Power: 30
Speed: 40
Engraving parameters
Power: 12-15
Speed: 200
Cooking our compostable bioplastic (60′)
As every student has been asked to bring a minimum of 100 gr of organic waste to this session, we will cook a recipe using it.
Instruments (every 2-3 people)
A pan
A wooden spoon
A meter
A weighting scale
A teaspoon
A knife
A mixer
A 1m x 0.5m non-porous board
Ingredients (for a board)
100 gr of cornflour
50 ml of white vinegar
50 ml of vegetable glycerin
100 gr of organic waste (orange peel, lemon, watermelon, beetroot, onion, coffee grounds, etc.)
1200ml of water
Know how:
1-Chop the organic residue and beat it with a bit of water.