Testing Liquids: Water, Food-Colored Water/Dirt Water, Chocolate Syrup, coffee, hand sanitizer, packets of ketchup/mustard/soy sauce.
Teacher Note: The hand sanitizer should degrade the Neverwet. Students may notice it sticking. They will apply it in Test 2 and then apply water to see if the hand sanitizer has degraded the Neverwet.
Test Lotus Effect
Today we will test the Lotus Effect using the samples prepared from our previous class. Your group will conduct 2 tests and record your results.
View Organizer: 1.2.2 Lotus Effect Test Results & Observations
- Test 1: Test your samples with the different liquids available in your class (except the hand sanitizer).
- Record results on the 1.2.2 Lotus Effect Test Results & Observations worksheet.
- Test 2: Apply the hand sanitizer to one of your samples. Then test with water. Record your results.
You will share your results: [Not every group will have tested every material/ liquid combination]:
- Which materials/liquid combinations were the most impressive as far as repelling dirt and water?
- Which materials/ liquid combinations did not work as well?
- What happened when the hand sanitizer was applied?
- Why do you think this happened when the hand sanitizer was applied?
- Which materials would be good for making footwear?
- Which materials might you include when redesigning footwear to keep it looking clean?
- Which material would you choose to go forward with in your design?
Teacher Note: The hand sanitizer should degrade the Neverwet. When students apply water after applying hand sanitizer to the Neverwet, the water is absorbed into the fabric.