Scientists dedicated to plastic recycling are constantly discovering new ways to use waste plastics, from converting them into useful aerogels or usable fuels. They have used plastic waste to make 5 incredible things.

Under the leadership of Associate Professor Lei Hanwu, the R & D team of Washington State University made an exciting breakthrough. They found a way to break down low-density polyethylene from waste plastic bags and water bottles into rice-sized particles and convert them into aircraft fuel. This involves placing the particles on top of an activated carbon bed in a so-called tubular reactor. Both carbon and plastic are heated to a temperature of up to 571ºC (1,060ºF), which causes them to thermally decompose and release the hydrogen content stored in the plastic. The result is a series of hydrocarbons, all of which can theoretically be used to make aircraft fuel.

In 2017, a research team created a semi-portable pyrolysis reactor that converts plastics into a range of vehicle fuels. It can be installed in a mobile system at the rear of a truck or ship, and handles this plastic conversion during the movement. The researchers used a new type of catalyst to complete this miniaturized pyrolysis. They said the catalyst can quickly decompose plastic waste into diesel and can be used without additional refining. The system is small, but it swallows 10,000 pounds (4536 kg) of waste plastic every day.

Manufacturing chemicals is a resource-intensive process in which a large amount of energy attempts to remove unwanted molecules from the liquid. Earlier this year, scientists at King Abdullah University of Science and Technology in Saudi Arabia started using PET plastics and dissolved them before using special solvents to reconstruct them into flat films. The team tested different versions of this new recycled plastic film and fine-tuned its design by adding additional polymers. The filter most suitable for removing molecules from liquids has pores 35 to 100 nanometers wide. Not only can it handle harsh chemicals, but the team also focuses on applications in the field of water filtration.

Scientists at the National University of Singapore have opened an aerogel made from discarded plastic bottles that can be used to filter dust particles. To this end, scientists made PET plastic into fibers and then coated with silica. These fibers are then chemically treated to swell and then dried into a lightweight, porous, and soft aerogel. This aerogel can be used for a variety of purposes, including building sound insulation or dust filters.

The research team found that if a compound was applied to the aerogel, the aerogel would absorb spilled oil seven times more efficiently than commercial materials. The team obtained a patent for this technology, and after publishing the research results, began to look for industrial partners to commercialize this technology.

As a material, carbon nanotubes have wide application prospects in the fields of medicine, marine engineering, and bomb disposal. As early as 2013, scientists at the University of Adelaide in Australia were trying to make carbon nanotubes by depositing a carbon layer into the pores of an alumina film. When the researchers used ethanol as the carbon source for the experiment, a team member found that any carbon source was fine, including carbon in plastic bags. In fact, this form of carbon builds carbon nanotubes more efficiently than ethanol, and scientists do n’t need toxic catalysts or solvents to help build carbon nanotubes.

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