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Researchers say fish heads, bones, skin and guts headed to landfill can be turned into useful material that could replace crude oil-derived polyurethanes, which are found almost everywhere: shoes, clothing, refrigerators and construction materials . Polyurethane is a type of plastic typically made from non-renewable crude oil, toxic to synthesize and taking centuries to decompose when discarded. A research team led by professor francesca kerton, a professor of chemistry at memorial university of newfoundland in canada, has created a biodegradable polyurethane-like plastic using fish waste that would otherwise likely be thrown away. If successfully obtained, fish oil-based polyurethane could help meet the immense need for more sustainable plastics .Biodegradable plastic made from fish remains the team started with oil extracted from the remains of atlantic salmon after the fish was prepared for sale to consumers. First, they add oxygen to the unsaturated oil in a controlled manner to form epoxides, molecules similar to those in epoxy resin.
After reacting these epoxides with carbon dioxide, they bind the resulting molecules with nitrogen-containing amines to form the new material. The team notes that the new eco-friendly polyurethane does not smell like fish. The team has also examined how easily the new biodegradable plastic will decompose once its useful life is over. They soaked pieces of biodegradable plastic in water and, to speed up the degradation of some pieces, they added lipase, an enzyme capable of breaking down fats such as those in fish oil. Even when soaked in tap water, the plastic quickly began to show signs Email Marketing List of microbial growth in all samples, which should lead to degradation. Some preliminary evidence suggests that naturally occurring, readily available amino acids such as histidine and asparagine could replace the previously used amine derived from cashew shells. Find it interesting how we can make something useful, something that might even change.
The way plastics are made, from the trash that people throw away,” says mikhailey wheeler, a graduate student working withhis patented hydroelectric speaker syncs with bluetooth to deliver high-quality sound directly to your shower head and automatically turns on and off with water. Once installed, shower power never needs to be removed thanks to its system. Skip tracks, play or pause with the touch of a button on the shower head or use the waterproof remote control. The design of the device features a cylindrical shape with a south wave amplifier to provide excellent sound quality, despite its small size. The patented “sound wave” diffuser sends sound in all directions for an immersive 360-degree audio experience, regardless of its dimension; and if the sound wave diffuser isn't enough, ampere has also designed a mini “droplet” bluetooth speaker that connects to the shower power so you can fill your entire bathroom with music. The company also plans to develop an led light edition of the speaker that syncs music to a light show inside the shower.
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发表于 2024-2-19 14:25:13