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Scientists created edible food films for food packaging

eurekalert.org
  • They dissolve in water in 24 hours, and could be used to pack fruit, vegetables, poultry, meat, and seafood.
  • Researchers created 3 types of food films based on sodium alginate, a natural biopolymer from seaweeds.
  • Sodium alginate is mixed with a natural acid that makes the films strong, and has antioxidant components that can prolong food’s shelf life.
  • It’s possible to enrich the films with natural antiviral substances like garlic, turmeric or ginger in order to extend food’s life even more.
  • Making these films requires no special equipment, it could be made in food or film factories.

This metal foam filters ultra-small particles like N95 masks, and it's recyclable

academictimes.com
  • New copper-based, reusable metal foam has near 100% air filtration efficiency for particles sized the size of COVID-19.
  • The foam starts with ultra-thin copper nanowires, and metal is deposited on them through electric currents.
  • Current filtration materials, such as those used in N95 masks, are easy to destroy, and not easily reusable.
  • Whereas the copper foam is a sustainable, reusable alternative that can be produced at scale for a very low cost, approximately $2 per filter.

Team creates new ultralightweight, crush-resistant tensegrity metamaterials

phys.org
  • Tensegrity is a century old design principle combining a flexible mesh with isolated rigid bars in order to delocalize deformations.
  • Thanks to this, the material can’t get destroyed in a chain reaction of locally confined damage (like when ceramics break from an initial small crack).
  • This is the first ever physical demonstration of tensegrity metamaterials.
  • It shows a 25 times improvement in deformability, and orders-of-magnitude improvement in energy absorption compared to state-of-the-art materials.
  • The material could have a wide array of potential engineering applications.

A self-sustainable wearable multi-modular E-textile bioenergy microgrid system

nature.com
  • New concept of an e-textile microgrid could use your activity to generate electricity.
  • A system like this would have sweat-based biofuel cells, electrostatic generators, and supercapacitors for high-power output.
  • It could power, for example, different types of displays, like an LCD wristwatch, along with a system of sensors.
  • The design could be a base for creating efficient, sustainable and autonomous wearable systems.

Diamond batteries promise to power space probes for 100 years

asia.nikkei.com
  • Man-made diamonds can generate electricity when you put them in a radioactive field, and voila - diamond batteries.
  • Since they’re powered by beta rays from carbon-14 and/or nickel-63 isotopes, these batteries can live for 100 years.
  • Diamond batteries have been deployed before, but this study offers a new type.
  • The new diamond batteries need a better power output, as for now they generate one-millionth of a watt in electricity.
  • They could be useful for space equipment or underground mining equipment.

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