From laundry detergent to dishwasher tablets, cleaning products are an indispensable part of life. Yet the chemicals that make these products so effective can be difficult to break down or could even trigger ecosystem-altering algal blooms. Now, researchers reporting in ACS’ Langmuir have addressed those challenges with an environmentally compatible detergent made of tiny wood fibers and corn protein that removes stains on clothes and dishes just as well as commercial products.

Increased public concern about household products’ impact on the environment has spurred interest in replacing traditional cleaners containing ingredients such as alkylphenol polyethoxylates and phosphates with natural alternatives. Efforts to date have produced mixed results because these cleaners are difficult to make and hard to rinse off, resulting in high manufacturing and retail costs, as well as potential damage to surfaces and fabrics. Therefore, there is a desire for low-cost, easily produced, effective alternatives that are gentle on the environment and the items they are designed to clean. To address this need, Pengtao Liu and colleagues developed an eco-friendly detergent from ingredients found in abundant renewable sources.

The researchers combined cellulose nanofibers from wood with zein protein from corn to create an emulsion. Cellulose can attract and repel water, so it is effective at forming such emulsions and attracting different types of stains. The zein protein, on the other hand, helps stabilize the emulsion and trap oils. Liu and colleagues then tested the cleaning capacity of the cellulose/zein detergent on cotton fabrics and dishes stained with ink, chili oil and tomato paste. They compared the performance of their new detergent to laundry powder and commercial dish soap solutions with deionized water.