Let's learn about cellulose
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Loading... - Carolina Mora
- 13 Sep 2022
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Cellulose is all around us. The main building block of plant cell walls, it’s nature’s most abundant polymer. It makes up about 90 percent of cotton and 50 percent of wood. Today, cellulose is used to make clothes, cardboard, coffee filters and countless other everyday items. But scientists are coming up with creative new uses for the substance. Here are just a few things that could be made better with a bit of cellulose:
Ice cream: Ice cream comes with a time limit. Eat it too slowly, and you’re slurping soup. But a dash of cellulose could help people savor ice cream for longer. Cellulose molecules expand as they dissolve in water. So, adding cellulose to food can make it thicker. In one experiment, mixing cellulose from banana stalks into ice cream helped it melt more slowly. Cellulose could also keep ice crystals from growing inside ice cream while stored in the freezer. This could keep frozen treats from turning gritty.
Cars: Cellulose gives plant stems and tree branches their strength and structure. Some engineers want to use that sturdiness to build stronger materials for cars and other products. And one team used tiny crystals of cellulose to make a material as hard and tough as bone. Such strong stuff could someday replace pollutive, plastic-based materials.
Glitter: Glitter isn’t just hard to clean up around the house. It dirties the environment. That’s because glitter is often made from toxic compounds or microplastics. But a new glitter made of cellulose could be nontoxic and biodegradable. In the new material, tiny cellulose fibers are arranged in structures like spiral staircases. Those spirals reflect different wavelengths of light, creating structural colors. Bits of that glitz could be added to makeup, paints and packaging.
Coolers and coffee cups: Cellulose may be the secret ingredient to greener foams, too. Styrofoam is a lightweight but sturdy insulator. That has made it useful for protecting packages during shipping. Styrofoam is also used to make coolers, coffee cups and other containers that need to keep heat in or out. But Styrofoam is made of plastic. Now, researchers have shown that a cellulose foam is a promising alternative. It’s just as strong as Styrofoam and a better insulator. Best yet, it’s biodegradable. Read More...
