Greener Solutions

Greener Solutions 2018: Roofing materials with Oakland EcoBlock

Partnered with The Oakland EcoBlock, the roofing materials group searched for compounds to replace the UV protection HALS compounds that typically suffuse TPO (thermoplastic polyolefin) roofing membranes. Although HALS compounds are effective and regenerative (individual HALS molecules can undergo multiple antioxidant cycles), they are toxic and tend to leach out of the membrane, posing an environmental threat . This group investigated a strategy of coupling natural antioxidants such as Vitamin C, Vitamin E, and poly-catechin to produce a...

Greener Solutions 2021: Alternatives for 6PPD in tire manufacturing

Saving coho salmon: Alternatives for 6PPD in tire manufacturing

In early 2021, 6PPD-quinone, which is a transformation product of 6PPD, was discovered as the likely cause of pre-spawn mortality in Coho salmon in the Pacific Northwest. 6PPD is a critical tire rubber additive with high-performing antidegradant properties. The team proposed four strategies: the use of food preservatives, such as gallates; replacement with the polymer lignin; modification of 6PPD to prevent formation of its toxic quinone form; and finally, broader process-level changes,...

Greener Solutions 2020: PFAS-Free Compostable Food Packaging

The food packaging team identified alternatives to fluoropolymer mixtures in molded fiber such as rhamnolipids and pectin added to the existing paper system and nanocellulose and lignin sourced from within the paper system. The team thought creatively to identify how materials that would normally be wasted in the existing paper production system could be reused.

Final Presentation...