Which common fabric soaks up the most water? You test six types on a tilted ramp:
- cotton
- silk
- linen
- wool
- polyester
- nylon
You sprinkle 300 ml of water over each sample. Then you weigh it to see how much water it absorbed. You repeat the test with samples coated in Scotch Guard (a water-repelling spray).
You discover which fabric resists water best on its own. You also see how much a protective coating helps each one.
Hypothesis
The hypothesis is that polyester will be the most water resistant fabric and that all fabrics will demonstrate better water resistance after a layer of Scotch Guard is applied.
A material's structure determines how much water it soaks up and holds inside it. You test six fabrics on a tilted ramp: cotton, silk, linen, wool, polyester, and nylon. You sprinkle 300 ml of water over each sample, then weigh it to measure how much water it absorbed. Cotton and linen soak up more water than polyester or nylon. You also repeat the test with samples coated in Scotch Guard, a water-repelling spray, to see how a coating changes how much water each fabric absorbs.
Different materials resist water in different ways. Some fabrics let water soak in easily, while others make it slide off. Adding a water-repelling spray changes how much water a fabric absorbs, showing that surface treatment controls repellency.
Method & Materials
You will cut the fabrics into the same size, measure their weight, treat some with Scotch Guard, spread them on a ramp, sprinkle water over them, and measure their weight again.
You will need a ramp, fabric pieces, Scotch tape, scissors, a ruler, tap water, a measuring cylinder, a plastic bottle with holes on the cover, and a digital weighing scale.
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The results showed that nylon and wool were the most water resistant fabrics and polyester was the least. Treating fabrics with Scotch Guard made them more waterproof.
Why do this project?
This science project is interesting because it tests different fabrics to see which ones are the most water resistant and how Scotch Guard affects the water resistance of the fabrics.
Also Consider
Consider repeating the experiment by immersing the fabric in water and comparing the time taken for them to dry, or by testing different types of fabrics.
Full project details
Additional information and source material for this project are available below.
