Living in a Material World
Joyce Zhang, Mila Ng
Burnaby North Secondary
Floor Location : M 138 V

Living In A Material World, an experiment assessing the biodegradability of bioplastics. The biodegradability of different homemade plastics were tested in order to concluded which recipe would decompose the most in a set amount of time. To achieve desired results; different, feasible recipes were decided upon. It was hypothesized that the recipe composed of milk and vinegar would biodegrade the most due to the bacterial substance created by the two ingredients. Since some oils are not biodegradable, it was concluded that the plastic containing oil would decompose the least.

Three different bioplastics were made, each recipe contained ingredients which varied. For instance, glycerin, the key ingredient of one recipe. The other two plastics’ main ingredients were either oil or milk. It is noted that the plastics were enhanced with a few quantitative changes, which in turn greatly affected the results negatively and positively.

After the completion of the plastics, a few key errors were discovered in the solutions due to the extra measurements. Whilst affecting not only the structure of the plastics, but the changes after biodegradation as well.

The hypothesis was partially correct. Despite the results being affected by a few un-calculated factors, the plastics turned out rather well. The milk-vinegar plastics had the greatest change in weight and volume, just as was stated in the hypothesis. However, the material which incorporated the oil did not biodegrade the least. Despite what was originally hypothesized, the oil did not affect the decomposition.