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Author: Tan KW   |   Latest post: Wed, 12 May 2021, 8:08 AM

 

Singapore varsity and S.Korean researchers create eco-friendly pollen sponge to tackle oil spills

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SINGAPORE : Scientists from Nanyang Technological University (NTU) and South Korea's Sungkyunkwan University have created an environmentally friendly sponge from sunflower pollen to tackle water pollution such as marine oil spills.

Professor Cho Nam-Joon from the NTU School of Materials Science and Engineering said that his team of researchers initially started looking at pollen for pharmaceutical drug delivery applications.

During their research, they discovered that pollen, which is known as the diamond of the plant kingdom for its hard exterior, could be transformed into soft, gel-like microgel particles. This shed new light on its potential as a material.

Prof Cho said: "When we first discovered that the ultra-tough pollen grains could be transformed into spongy microgel particles, this excited us because the microgel particles were a bit like Play-Doh and could be made into various shapes.

"From that point, curiosity drove us and we eventually found the right set of conditions and steps to make the sponge and we saw many great application possibilities, including oil absorption."

Researchers around the world have been looking for more eco-friendly ways to tackle oil spills.

The cleanup methods for oil spills currently include using chemical dispersants to break oil down into small droplets, or absorbing it with expensive, unrecyclable materials, such as polymer and synthetic materials, which may worsen the damage to the marine ecosystem.

Prof Cho described pollen not used for pollination as a biological waste and the research team took three years to develop the sponge, which is affordable, biodegradable and reusable.

In their tests, the team found that the sponge could absorb oil contaminants such as gasoline and motor oil at a rate comparable to commercial oil absorbents.

They also tested for its reusability by soaking it in silicon oil repeatedly and then squeezing it. The team found the process could continue for 10 cycles.

These findings made the pollen sponge a good alternative to existing methods of handling oil spills.

The researchers plan to expand the size of the sponges to meet industry needs, and are looking to work with non-governmental organisations and international partners to test it in real-life settings.

Prof Cho said: "We hope our innovative pollen materials can one day replace widely-used plastics and help to curb the global issue of plastic pollution."

 - ANN

 

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