University of Minnesota researchers develop environmentally friendly plastics

University of Minnesota Researchers Develop Renewable Environmental Friendly Plastics

Renewable Environmental Plastics Offer an Alternative to Petroleum

University of Minnesota researchers announced a major advance in renewable environmentally-friendly plastics on May 26, 2011. Their research focused on developing degradable plastics from renewable resources rather than petroleum and natural gas.

More importantly, the scientists wanted to create materials that could compete with conventional plastics. Their work explored ways to improve durability, heat resistance and environmental performance.

Professor Marc Hillmyer, director of the university’s Center for Sustainable Polymers, helped lead the research. His team investigated how renewable feedstocks could support a more environmentally friendly and a sustainable plastics industry.

Improving the Performance of Renewable Environmentally Friendly and Biodegradable Plastics

One major focus involved polylactides, commonly known as PLA. Manufacturers use these polymers in food packaging, medical devices, sutures and other products.
However, conventional PLA has limitations. For example, certain formulations soften when exposed to higher temperatures. Consequently, manufacturers cannot use them in every application that requires heat resistance or structural strength.

In addition, Hillmyer and his colleagues developed new PLA-based materials to address these challenges. Their research aimed to improve toughness and temperature stability while maintaining the advantages of renewable raw materials.

As a result, the researchers envisioned applications ranging from durable household products to bottles, microwave trays and electronic-device cases.

Soybean Oil Could Replace Petroleum-Based Plastic Additives

Meanwhile, University of Minnesota research professor Dharma Kodali investigated another important challenge: plastic additives.

Manufacturers commonly use plasticizers to make plastics more flexible and easier to process. However, many conventional plasticizers come from petroleum.

Certain phthalate plasticizers have also raised the need for renewable environmental plastics; as well as health concerns. Their potential to migrate from plastic products has encouraged researchers to investigate alternatives.

Therefore, Kodali developed plasticizers using soybean oil. These renewable additives offered a possible substitute for some petroleum-derived formulations.

The research suggested that soy-based plasticizers could deliver competitive performance and cost while offering advantages in renewable sourcing and environmental degradability.

Nevertheless, the environmental and health benefits of any replacement depend on its specific chemical composition, exposure conditions and testing results.

Applications Across Multiple Industries

Renewable environmental plastics could serve many industries. For example, manufacturers could explore these materials for automotive components, construction products, packaging and consumer electronics.

Additionally, the research opened opportunities for medical applications and household goods.
Improved heat resistance could expand PLA’s usefulness. Meanwhile, renewable environmentally friendly plasticizers could help manufacturers reduce their dependence on fossil-derived additives.

However, successful commercialization would require more than laboratory performance. Manufacturers would also need to evaluate processing costs, product durability, supply chains and end-of-life management.
Importantly, degradable does not automatically mean a plastic will break down quickly in nature. Some PLA products require specific industrial composting conditions.

Building a More Sustainable, Renewable Environmental Plastics Industry

The University of Minnesota research demonstrated how chemistry and agricultural resources could support new manufacturing technologies.
Hillmyer’s research received support from the U.S. Department of Agriculture and NatureWorks LLC. Meanwhile, the United Soybean Board funded Kodali’s work.

Together, these research efforts highlighted two approaches to reducing petroleum dependence. One focused on developing renewable environmentally friendly plastic polymer materials. The other explored renewable additives that could replace selected conventional chemicals.

At the time, researchers expected the market for bio-based polymers to expand substantially. However, those early projections represented expectations rather than confirmed market outcomes.

Conclusion: Renewable, Environmentally Friendly Plastics Need Better Chemistry

The University of Minnesota’s 2011 research showed that renewable plastics could offer more than an alternative source of raw materials.
By improving PLA performance and developing soybean-based plasticizers, scientists explored ways to make sustainable materials more practical.
Furthermore, these innovations demonstrated how renewable agriculture, advanced chemistry and industrial manufacturing could work together.
Ultimately, environmentally friendly plastics must combine useful performance with responsible sourcing, safe chemistry and appropriate end-of-life solutions. That combination remains essential to reducing the environmental impact of plastic products.

MINNEAPOLIS / ST. PAUL (5/26/2011)