New hydrogel sheets could one day replace paper towels as the quickest picker-upper.
Appropriately, Raghavan and their group relied in part on another common household kitchen item—Ziploc bags—to help craft their new tool. First, an acid, base, and other ingredients to make the hydrogel were combined in storage bags. From there, the mix generated carbon dioxide in the gel. The bag was then placed between glass and subsequently exposed to UV light to set the gel around the bubbles, making it much more porous.
In test comparisons, their gel sheet was able to absorb over 25 ml of water within just 20 seconds, while a cloth pad only managed 60 percent of the same amount of liquid. Researchers also tested their hydrogel on 40 mL blood, which it absorbed almost entirely within 60 seconds, compared to gauze managing only 55 percent.
If available to the public, the material could help in countless scenarios, from everyday chores to hazardous or toxic liquid cleanups. Unfortunately, the team’s new hydrogel sheet won’t be stocked on store shelves anytime soon—they would still be out of most consumers’ price range, and they remain non-reusable for the time being.
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