Weekly Simcha Science - Sunday 04/25/26
I am changing this to weekly instead of daily. Scientists Discover an Amazing New Use For Your Leftover Coffee Grounds Scientists in South Korea have found a clever new use for your old coffee grounds: Insulation. A team from Jeonbuk National University (JBNU) converted coffee waste into a material that was just as effective at insulation as materials currently used in buildings. The advantage is that the new material is made from renewable sources rather than fossil fuels and, when it comes time to dispose of it, it's biodegradable. "Coffee waste is produced on a massive scale worldwide, yet most of it ends up in landfills or is incinerated," says Seong Yun Kim, materials engineer at JBNU. "Our work shows that this abundant waste stream can be upcycled into a high-value material that performs as well as commercial insulation products while being far more sustainable." Collectively, the world drinks about 2,25 billion cups of coffee every day, and that translates into a huge amount of discarded grounds. Most of this waste is burned or buried, which is as bad for the environment as dumping it down the drain. Instead, scientists are increasingly finding more useful things to do with old coffee grounds. Recent studies have explored adding the stuff to concrete and other paving materials, using it to remove herbicides from the environment, and even extracting new drug compounds from it. In the new study, the JBNU team investigated how well coffee grounds could function as a thermally insulating material. First, spent coffee grounds were dried out in an oven at 80 degrees Celsius (176 degrees Fahrenheit) for a week. Then, they were cooked at much higher temperatures to produce a carbon-rich material known as blochar. Next, this biochar was treated with environmentally friendly solvents, water, ethanol, and propylene glycol, and then mixed with a natural polymer called ethyl cellulose. Finally, the powdery mixture is compressed and heated into a composite material.