Health
Use an evaporation-based approach to direct sweat to yourself
Body odor is an unpleasant odor produced by the bacteria that live on the skin breaking down sweat proteins. To avoid odors, some people delay sweating by using antiperspirants that clog the sweat glands with foreign substances such as metal.
As a step towards a more natural solution, researchers ACS Applied Materials & Interfaces Sweat was directed at itself using an evaporation-based approach in which the salt of sweat creates a gel-like plug.
Most over-the-counter antiperspirants use metal salts such as aluminum chlorohydrate to clog the sweat glands. A few years ago, it was suggested that the use of these products could increase the risk of developing breast cancer, but according to the National Cancer Institute, there is no scientific evidence to support these claims.
Nevertheless, consumer and regulatory demand is increasing for natural non-metal alternatives. Propylene glycol attracts water strongly and is “generally recognized as safe” by the U.S. Food and Drug Administration, so Jonathan Boreiko and colleagues want to see if they can draw water from sweat and leave a natural salt block that stops the flow. I was thinking. ..
To simulate sweat glands in the lab, researchers slowly pushed artificial sweat into a thin glass tube. Next, a polymer cube covered with propylene glycol was placed near the opening. The sweat solution first foamed, then formed a gel-like plug and closed the tube within 2 minutes. However, if the cube did not contain propylene glycol, or if there was no cube, sweat would continue to exit the outlet and flow along the outer surface of the tube.
The team used a glass tube 3.3 times wider than the actual sweat glands of human skin, but their model suggests that applying propylene glycol film directly to the skin also results in the formation of dehydrated salts and plugs. doing. The next step in this study is to perform human testing to compare the comfort and effectiveness of films made of propylene glycol or other water-attracting materials with traditional metal-based antiperspirants.
Source:
Journal reference:
Lolla, VY, et al. (2020) Clogged by evaporation of artificial sweat gland canal. ACS Applied Materials & Interfaces. doi.org/10.1021/acsami.0c13493..
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