Polystyrene — common in packing peanuts and box inserts — is manufactured from fossil fuels. To develop a sustainable alternative, researchers reporting in ACS Applied Polymer Materials tested an unconventional starting material: sawdust. Their prototype foams incorporated cellulose binders and other additives to form rigid or flexible materials, and some versions matched polystyrene’s strength and impact resistance. A simple beeswax coating made them water-resistant, producing biobased foams with potential for packaging and building materials. 

Contact lenses are a great vision correction option for many, but if one of them gets damaged, there is little to do other than throw it away. A team reporting in ACS Applied Polymer Materials has a solution: special polymer hydrogels and UV light. Scratches on lenses made from their new material were easily repaired with an hour of UV light exposure. This demonstration is a first step toward the next generation of contact lenses. 

Compostable plastics could be part of a solution to the world’s plastic waste problem. But currently these materials need industrial composting facilities to break down. In a step toward making a home-compostable plastic, researchers reporting in ACS Central Science have augmented polylactide (PLA) — a widely used biobased and compostable polymer— with a small amount of an additive. Tests show it helps the material degrade substantially faster without sacrificing critical qualities like strength or transparency. 

Once cotton gets wet, it pulls heat from your body. This is helpful when you’re exercising or outside on a hot day but dangerous in the bitter cold. Now, researchers reporting in ACS Energy Letters have created an ultralight synthetic fiber material with a cotton-like fluffiness that also repels water. The prototype fabric outperformed regular cotton in both retaining heat in the cold and releasing heat at room temperature.