Scientists Turn Milk Into Biodegradable Plastic That Disappears in Soil

Scientists have developed milk biodegradable plastic that naturally breaks down in soil within weeks.This innovation could reduce pollution caused by traditional plastic packaging.Researchers at Flinders University created the material using milk protein, starch, and natural clay. As a result, the plastic remains strong during use but disappears after disposal.Unlike standard plastics, this material avoids harmful chemicals. Therefore, it offers a safer option for people and the environment.

The Plastic Breaks Down Naturally

The team blended calcium caseinate with modified starch and bentonite clay.
In addition, they added glycerol to improve flexibility and strength.Tests showed steady decomposition under normal soil conditions. As a result, the material fully broke down in about 13 weeks.Importantly, the plastic stayed stable during handling and storage.
However, microbes in soil quickly consumed it after disposal.Microbial testing also showed low toxicity levels. Therefore, the material meets safety standards for biodegradable packaging.

This Discovery Matters

Food packaging creates most single-use plastic waste worldwide.For example, millions of tons end up in landfills every year.This milk biodegradable plastic offers a practical alternative.It uses affordable, widely available ingredients instead of petroleum-based materials.Researchers also designed the formula for easy industrial scaling.
As a result, companies could adopt it without major cost increases.Experts believe sustainable packaging is essential to slow pollution growth. Therefore, materials like this support a circular economy.Although more testing is needed, early results look promising. This discovery shows how science can turn everyday materials into powerful solutions.