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UC San Diego scientists produce algae-based flip flops
14
Oct '17
UC San Diego scientists produce algae-based flip flops
UC San Diego students and researchers have produced the world’s first algae-based, renewable flip flops. The first prototypes consist of a flexible, spongy slipper adorned with a Triton logo and a simple strap. The impact of this innovation could be revolutionary, changing the world for the better environmentally. A pair is likely to cost $3.

Three billion petroleum-based flip flops are produced worldwide each year, eventually ending up as non-biodegradable trash in landfills, rivers and oceans around the globe.

“Even though a flip flop seems like a minor product, a throwaway that everyone wears, it turns out that this is the Number one shoe in the world,” says Stephen Mayfield, a UC San Diego professor of biology who headed the research effort with Skip Pomeroy, a professor of chemistry and biochemistry. “These are the shoes of a fisherman and a farmer. This is the Number one shoe in India, the number one shoe in China and the number one shoe in Africa. And, in fact, one of the largest pollutants in the ocean is polyurethane from flip flops and other shoes that have been washed or thrown into rivers and flow into the ocean.”

Mayfield and Pomeroy, along with their undergraduate and graduate students, teamed up two years ago to develop the world’s first algae-based surfboard. The UC San Diego scientists worked with a local surfboard blank manufacturer, Arctic Foam of Oceanside, to figure out how to make from algae oil the hard, polyurethane foam core of a surfboard, which is typically constructed from petroleum.

That development, which was quickly embraced by a surfing industry looking for ways to produce more sustainable and environmentally friendly products, got the two UC San Diego professors thinking about their next step.

“The algae surfboard was the first obvious product to make, but when you really look at the numbers you realise that making a flip flop or shoe sole like this is much more important,” says Mayfield. “Depending on how you do the chemistry, you can make hard foams or soft foams from algae oil. You can make algae-based, renewable surfboards, flip flops, polyurethane athletic shoes, car seats or even tires for your car.”

To demonstrate the feasibility of their campus-based innovation, Triton Soles, Mayfield and Pomeroy applied for and were awarded last April a $50,000 proof-of-concept grant from the campus Office of Research Affairs. Theirs was one of eight grant awards made in the first year of the Accelerating Innovations to Market programme, initiated by UC San Diego’s Office of Innovation and Commercialisation, a part of the Office of Research Affairs, and paid for with the help of local elected officials through State Assembly Bill 2664. The goal of the bill is to bring more laboratory inventions from the campus to commercial development.

“Part of the challenge is that typically I’d make a discovery, publish a paper and that’s sort of the end of it,” Mayfield explains. “But the best invention that you keep inside the lab really isn’t valuable for the world. And the way you make that invention valuable is to turn it into a product.”

The two professors, along with Michael Burkart, a professor of chemistry and biochemistry, formed a startup company, Algenesis Materials, which employs some of the students working on the flip flops and other projects and provides them with the opportunity to experience what Pomeroy calls “project-based learning.”

“Teaching chemistry in the classroom is sometimes like trying to teach soccer at the chalkboard,” Pomeroy explains. “In the laboratory, students are far more engaged when they’re actually trying to solve a problem. Most people will tell you that our students are really, really bright, but they don’t always have practical experience. This is a way to provide them with that.”

As the first product for Algenesis, the Triton flip flop will allow the three faculty members and students to fine tune the chemistry and manufacturing process for their future shoe soles, car seats and other products traditionally made from petroleum.

“Petroleum comes from algae that lived in the ancient oceans hundreds of millions of years ago,” says Mayfield. “A lot of people don’t know that. But what that means is that anything we can make from petroleum we can ultimately make from algae.”

The Triton flip flops, shoe soles and other polyurethane products the scientists make from living algae oil are “sustainable” because the carbon to construct them was pulled from the atmosphere, rather than underground oil reserves. And the scientists are seeking to also make them “biodegradable,” by chemically converting the algae oil into polyurethane in manner that will allow the carbon bonds to be degraded by microorganisms.

These renewable flip flops, now produced in an array of colours, are allowing the UC San Diego team to fine tune the chemistry for future shoe soles, car seats and other products traditionally made from petroleum.

“The idea we’re pursuing is to make these flip flops in a way that they can be thrown into a compost pile and they will be eaten by microorganisms,” says Mayfield.

As a longtime surfer immersed in the ocean environment, Mayfield says that using the expertise he developed over decades studying algae and applying it to develop sustainable and environmentally friendly surfboards, flip flops and other beach products was important to him.

“If we can make these products sustainable and biodegradable, we can impact not only San Diego, but every beach community on the entire planet,” he says. “In San Diego, we have this fantastic surfing culture, many of our faculty and students are surfers, and I think all of us understand because of that connection to the ocean how important the environment is.”

The algae surfboard developed two years ago by students and faculty is now being used by a number of professional surfers and has spawned a new industry. And with the help of a shoe factory in Leon, Mexico, the current plan is to do the same. The first step, however, will be the production of a few thousand pairs of Triton flip flops as a test, which will be provided to UC San Diego alumni and given out for special events. (SV)

Fibre2Fashion News Desk – India


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