Structure and Mechanical Properties of Polylactic Acid Bioplastic Film Using Poly(ricinoleic acid)-co-Poly(lactic acid) Additives

Currently, PLA, or Polylactic Acid, is a biodegradable plastic produced from renewable materials such as corn or sugarcane. As a result, PLA is widely used due to its environmental friendliness and ability to replace petroleum-based plastics. PLA plastic film is clear and shiny like glass, with a melting point of 180–220 degrees Celsius. It can be easily molded and cools quickly. PLA is commonly used to produce food packaging, including boxes, plates, spoons, knives, forks, chopsticks, straws, drinking glasses, coffee cups with lids, shopping bags, food wrap films, and more. PLA plastic is odorless because it is made from natural materials. However, its main disadvantages are fragility, inflexibility, and a tendency to break easily when bent without care due to its hardness. Ricinoleic acid, a component found in castor oil and classified as a semidrying oil that can harden when exposed to air, may be mixed with PLA to improve properties such as flexibility and resistance to brittleness. Therefore, the objectives of this project are to enhance the structure and mechanical properties of PLA film, making it more flexible and durable. The results could set a new trend in promoting PLA as a viable bioplastic alternative to petroleum-based plastics. Additionally, this project could serve as a guideline for developing other technologies aimed at improving the mechanical properties of various materials.