We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
The Potential of Bio-Based Polylactic Acid (PLA) as an Alternative in Reusable Food Containers: A Review
Summary
This review evaluates polylactic acid as a potential sustainable alternative to polypropylene in reusable food containers, examining its mechanical, thermal, and barrier properties. Researchers found that while PLA has limitations including brittleness and heat sensitivity, these can be improved through blending with other biopolymers. The study compares PLA-based composites against conventional polypropylene and considers end-of-life options and commercial costs of making the switch.
The biodegradable biopolymer polylactic acid (PLA) has been used in the recent past in single-use packaging as a suitable replacement for non-biodegradable fossil fuel-based plastics, such as polyethylene terephthalate (PET). Under FDA and EU regulations, lactic acid (LA), the building block of PLA, is considered safe to use as a food contact material. The mechanical, thermal, and barrier properties of PLA are, however, major challenges for this material. PLA is a brittle material with a Young’s modulus of 2996–3750 MPa and an elongation at break of 1.3–7%. PLA has a glass transition temperature (Tg) of 60 °C, exhibiting structural distortion at this temperature. The water permeability of PLA can lead to hydrolytic degradation of the material. These properties can be improved with biopolymer blending and composites. Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), for instance, increases the thermal stability of PLA while decreasing the water permeability by up to 59%. Polypropylene (PP) is one of the most common plastics in reusable food containers. This study will compare PLA-based blends and composites to the currently used PP as a sustainable alternative to fossil fuel-based plastics. The end-of-life options for PLA-based food containers are considered, as is the commercial cost of replacing PP with PLA.
Sign in to start a discussion.
More Papers Like This
Biocomposites and Poly(lactic acid) in Active Packaging: A Review of Current Research and Future Directions
This review examines how bio-based and biodegradable materials, especially polylactic acid (PLA), are being developed as sustainable alternatives for food packaging. While these materials aim to reduce petroleum-based plastic pollution, the review notes that biodegradable plastics can still break down into microplastics during their degradation process. Understanding the full lifecycle of these alternative materials is important for determining whether they truly reduce microplastic contamination.
Environmental Impact of Food Packaging Materials: A Review of Contemporary Development from Conventional Plastics to Polylactic Acid Based Materials
This review examined the environmental impacts of conventional food packaging plastics and assessed biopolymer alternatives such as PLA, discussing production from renewable feedstocks, material performance properties, and the potential for bioplastics to reduce fossil plastic waste in the packaging sector.
Mechanical properties of fibre/ filler based poly(Lactic Acid) (Pla) composites : A brief review
This review examines the mechanical properties of polylactic acid (PLA)-based composites reinforced with natural fibers and fillers, presenting PLA as a biodegradable alternative to conventional plastics in applications ranging from agriculture to biomedical devices. Improving the strength and durability of bio-based plastics is essential for replacing petroleum-based materials that generate persistent microplastic pollution.
State of the art on biodegradability of bio-based plastics containing polylactic acid
This review examines whether bio-based plastics made from polylactic acid (PLA) actually break down in the environment as intended. While certain microorganisms can degrade PLA, the process is slow and depends heavily on conditions like temperature and moisture. The findings matter because if bio-based plastics do not fully break down, they can still fragment into microplastics, posing many of the same environmental and health risks as conventional plastics.
Poly(Lactic Acid) / Polyester Blends: Review of Current and Future Applications
This review covers PLA blends with petroleum-based polyesters (PBT, PET) as a strategy to overcome PLA limitations including slow biodegradation, high cost, and low toughness, summarizing current research on blend compatibility, mechanical properties, and potential application areas.