Japan's Todai developed a biodegradable magic coating, A4 paper can also hold milk tea
According to a study published on the 13th in the journal "Research in Industrial and Engineering Chemistry" published by the American Chemical Society, researchers at the University of Tokyo in Japan have found for the first time a simple, economical and efficient method to "endow" some properties of plastics to relative Among sustainable paper materials, a coating called Choetsu not only makes the paper waterproof, but also keeps it elastic and biodegradable.
"In my opinion, the main problem with plastic materials is that they cannot degrade quickly and safely." said Quanji Hiroi, a professor at the Institute of Solid State Physics at the University of Tokyo. Although materials like paper can be safely degraded, they cannot meet a wide range of plastic materials. use. Now, the new method can give paper some of the good properties it comes from plastic, but without any ill effects on the environment.
Choetsu is a combination of materials that, when applied to paper, spontaneously creates a strong waterproof film when it comes into contact with moisture in the air. The coating consists of safe and low-cost chemicals, mainly methyltrimethoxysilane, some isopropanol, and a small amount of tetraisopropyl titanate. Structures made of paper, such as food containers, are sprayed or dipped into this coating and dried at room temperature. Once dry, a thin layer of silica containing methyl groups is deposited on the cellulose that makes up the paper formed to provide strong waterproof performance.
