Waterloo researchers create all‑cellulose coating to replace plastic liners in disposable cups
A University of Waterloo team developed a cellulose acetate coating reinforced with cellulose nanocrystals. In tests against boiling water, food oil and solvents it remained intact while conventional plastic liners shed particles. Published in ACS Sustainable Chemistry & Engineering, the plant‑based barrier could simplify paper recycling and reduce microplastic release from beverage containers.
Led by Prof. Shirley Tang, the Waterloo team engineered a durable coating made from plant‑derived cellulose acetate and cellulose nanocrystals. Comparative tests showed the all‑cellulose barrier resisted prolonged exposure to boiling water, oils and solvents, whereas standard plastic liners exhibited surface degradation and particle release. The coating can be applied to lightweight paper, allowing thinner substrates while maintaining protection—potentially easing recycling and lowering material use in disposable cups and food packaging. Findings appear in ACS Sustainable Chemistry & Engineering (2026).
Read the original story · Université de Waterloo — nouvelles — https://uwaterloo.ca/news/science/black-coffee-hold-plastic