Scientists Create Self-Cleaning Bioplastic Inspired by Lotus

This picture shows farmer Nguyen Van Khoa harvesting lotus flowers on a pond in Hanoi. (AFP)
This picture shows farmer Nguyen Van Khoa harvesting lotus flowers on a pond in Hanoi. (AFP)
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Scientists Create Self-Cleaning Bioplastic Inspired by Lotus

This picture shows farmer Nguyen Van Khoa harvesting lotus flowers on a pond in Hanoi. (AFP)
This picture shows farmer Nguyen Van Khoa harvesting lotus flowers on a pond in Hanoi. (AFP)

A research team at the Royal Melbourne Institute of Technology (RMIT) have developed a self-cleaning bioplastic that is eco-friendly and ideal for fresh food and takeaway packaging.

The new plastic is inspired by the nature full of ingeniously designed structures that could inspire researchers striving to develop new high-performance and multifunctional materials, reported the team in their study published March 8 in the journal Science of The Total Environment.

Plastic waste is one of our biggest environmental challenges but the alternative this team developed is both eco-friendly and cost-effective. "We've replicated the phenomenally water-repellent structure of lotus leaves to deliver a unique type of bioplastic that precisely combines both strength and degradability," lead author Mehran Ghasemlou said.

The bioplastic is made from cheap and widely available raw materials -- starch and cellulose -- to keep production costs low and support rapid biodegradability.

The fabrication process does not require complicated equipment and would be simple to upscale to a roll-to-roll production line, Ghasemlou said.

While biodegradable plastics are a growing market, most biodegradable or compostable plastics require industrial processes and high temperatures to break them down.

The new bioplastic does not need industrial intervention to biodegrade, with trials showing it breaks down naturally and quickly in soil. "There are big differences between plant-based materials -- just because something is made from green ingredients doesn't mean it will easily degrade," Ghasemlou said.

"We carefully selected our raw materials for compostability and this is reflected in the results from our soil studies, where we can see our bioplastic rapidly breaks down simply with exposure to the bacteria and bugs in soil. Our ultimate aim is to deliver packaging that could be added to your backyard compost or thrown into a green bin alongside other organic waste, so that food waste can be composted together with the container it came in, to help prevent food contamination of recycling,” he explained.

The researchers inspired their new bioplastic from the always immaculate lotus leaf renowned for having some of the most water-repellent surfaces on earth and are almost impossible to get dirty.

The secret lies in the leaf's surface structure, which is composed of tiny pillars topped with a waxy layer. Any water that lands on the leaf remains a droplet, simply rolling off with the help of gravity or wind. The droplets sweep up dirt as they slide down, keeping the leaf clean.

To make their lotus-inspired material, the RMIT team of science and engineering researchers first synthetically engineered a plastic made of starch and cellulosic nanoparticles. The surface of this bioplastic was imprinted with a pattern that mimics the structure of lotus leaves, then coated with a protective layer of PDMS, a silicon-based organic polymer.

Tests show the bioplastic not only repels liquids and dirt effectively, but also retains its self-cleaning properties after being scratched with abrasives and exposed to heat, acid and ethanol. Corresponding author, Professor Benu Adhikari, said the design overcomes key challenges of starch-based materials.

"Starch is one of the most promising and versatile natural polymers, but it is relatively fragile and highly susceptible to moisture. By mimicking the 'lotus effect', we have delivered a highly effective starch-based biodegradable plastic," Adhikari said.

Ghasemlou is currently working with a bioplastic company, which is evaluating further development of these novel water repellant materials to start the commercial applications of the bioplastic.



NEOM Nature Reserve Reintroduces Six Animal Species

NEOM is working to rebuild self-sustaining ecosystems through habitat rehabilitation, species recovery, and cutting-edge ecological monitoring - SPA
NEOM is working to rebuild self-sustaining ecosystems through habitat rehabilitation, species recovery, and cutting-edge ecological monitoring - SPA
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NEOM Nature Reserve Reintroduces Six Animal Species

NEOM is working to rebuild self-sustaining ecosystems through habitat rehabilitation, species recovery, and cutting-edge ecological monitoring - SPA
NEOM is working to rebuild self-sustaining ecosystems through habitat rehabilitation, species recovery, and cutting-edge ecological monitoring - SPA

As part of its bold rewilding strategy, NEOM has reintroduced more than 1,100 animals across six species to its expansive Nature Reserve—an important milestone in its broader mission to restore the region’s natural balance. With 95% of the region’s land preserved for nature, NEOM is working to rebuild self-sustaining ecosystems through habitat rehabilitation, species recovery, and cutting-edge ecological monitoring.

According to NEOM, when the Arabian Oryx was first reintroduced into the Nature Reserve in December 2022, it marked a milestone occasion, signifying the first time the animal had walked the sands of north-western Saudi Arabia for nearly 100 years, SPA reported.

In the early 1970s, the Oryx was extinct in the wild due to hunting and poaching, but conservation efforts across the region have seen its numbers swell in recent years, with more than 208 now calling NEOM home. Perfectly adapted to the region’s desert conditions, its white coat reflects the sun, while its complex nasal system cools the air it breathes and conserves water by recycling moisture as it exhales.

Another member of the Bovidae family, Arabian Sand Gazelles are petite, graceful animals that typically reside in sand dunes and coastal flats across the Arabian Peninsula. Gazelles are swift creatures, clocking speeds of up to 100 kilometers per hour in short bursts.

They are herbivores, and while NEOM’s regreening initiative continues to develop – with 4.7 million trees, shrubs, and grasses planted to date – the 530 Arabian Sand Gazelles currently residing in the reserve benefit from the natural vegetation that has returned to the area, following the removal of heavy livestock grazing. NEOM is also home to 223 Arabian Gazelles, which are typically darker in color and harder to find, preferring to reside in foothills and rugged mountain terrain.

Desert-dwelling wild goats can be found in NEOM’s rocky, mountainous terrain, and are typically recognized by their impressive arched horns. Males have backward-arched horns that can reach up to one meter in length, while females have much shorter horns and are lighter in color.

They are incredible climbers and have hooves with rubbery soles to act as suction cups on hard surfaces, aiding them in navigating steep cliffs to avoid predators, including wolves. NEOM has successfully reintroduced 53 Nubian Ibex to the reserve, adding to the population of several wild Ibex who have naturally returned to the area and are often caught on camera as part of NEOM’s monitoring program.

The red-necked ostrich, the largest and fastest living bird on earth, can stand up to 2.7 meters tall and weigh more than 150 kilograms. Their eggs are the largest of any living animal, measuring up to 15 centimeters long and up to 1.4 kilograms in weight. The bird gets its namesake from the fact that males have a reddish hue on their neck, especially in breeding season, when they perform an elaborate courtship display to attract females.

Currently, 27 chicks have been raised in NEOM Nature Reserve, which are well adapted to the region’s climate and feed on seeds, grass, leaves, and occasionally small insects or animals. Their strong legs allow them to run up to 70 kilometers per hour and, despite their size, red-necked ostriches are flightless.

Furthermore, the Lanner Falcon, last spotted in the wild in Saudi Arabia more than four decades ago, was reintroduced to NEOM Nature Reserve earlier this year in a momentous occasion. Known for its speed and agility, the Lanner Falcon can dive at speeds of more than 320 kilometers per hour. It has a striking appearance, with dark markings on its chest and belly, and a distinctive black moustache mark across its white face.

The release of Lanner Falcons into Bajdah at NEOM Nature Reserve forms part of a rewilding partnership between NEOM and the Saudi Falcon Club (SFC), which aims to reintroduce native falcon species within the Kingdom.