A new algae-based menstrual pad could stop leaks

Menstruation may perhaps be messy and uncomfortable, regularly ensuing from leaky pads, tampons and cups. A new alginate-based powder may resolve that subject depend. The fabric, which solidifies menstrual blood by turning it right into a gel mix, should cut leakage in interval items devoid of compromising potential, researchers doc July 10 in Topic.

“Our paper is a proof of perception,” says Rogério Aparecido Bataglioli, a chemical engineer at Virginia Tech in Blacksburg. Formerly being used commercially, he says, the presents would have obtained to be assessed for security and scalability.

Most menstrual pads use cellulose-based presents to soak up interval blood. In addition to the fact that they're fine, many folks that menstruate nonetheless struggle with leakage and mess.

To resolve this subject depend, the crew grew to become to alginate, a naturally taking location substance derived from algae and seaweed. After the researchers screened a massive pool of potential polysaccharides — lengthy chains of carbohydrate molecules — which could have blood-absorbing residences, alginate excelled at absorbing and gelling blood. It also has already been approved by the Food and Drug Administration to be used in pharmaceuticals, meals and clinical presents.

To extra improve the alginate’s absorption, the researchers extra glycerol. They then examined the absorbency of these alginate-glycerol powders against commercial absorbents by sandwiching every between sheets of gauze. The crew dripped modified pig blood thru a mannequin vagina to mimic menstruation beforehand than performing a squeeze have a analyze on the blood-soaked presents. In addition to the fact that every were good at absorbing the blood, when the simulated interval pads with commercial absorbent were compressed, it become “like squeezing a sponge,” says Bryan Hsu, a microbiologist at Virginia Tech. With the alginate fabric, which gelled the blood, the pads leaked less less than energy.

The crew also examined their new fabric in menstrual cups. They packed the alginate-glycerol powder right into a chronic and narrow cotton sheath that become then coiled round internal of the cup. After the blood entered the menstrual cup and encountered the alginate, it gelled. Then, the blood may perhaps be eradicated alongside with the cotton tube — and a edition new you would be reinserted — with minimal liquid mess. In solidifying the menstrual blood right into a gel, Hsu says, the intention is to make menstrual cup elimination and detoxification more handy and tidier.

One difficulty of the analyze, notes ob–gyn Abigail Liberty, is that the blood become defibrinated pig blood, which does no longer incorporate fibrin, a protein worried in clotting. In addition to the fact that she applauds the crew for on account of blood in its place than some of the mannequin fluid, menstrual blood is “real than blood that’s just floating round the physique,” says Liberty, of Oregon Fitness & Science Faculty in Portland (SN: 4/16/24). “It’s secreted in a real way. It’s grown, it’s released in a real way.”

Caused by a scarcity of analyze on menstrual care and interval items, Bataglioli and colleagues did no longer have a base of experimental systems to draw from and adapt. As an resolution, they designed many of their systems from scratch. “That’s a message to the scientific regional — there’s nothing on the market,” says Zeinab Hosseinidoust, a biomedical engineer at McMaster Faculty in Hamilton, Canada. “Even increased very very massive than the factual analyze that become applied is the message that this work sends.”