Why toothpaste and cement harden over time — ScienceDaily

Have a look contained in the cap of your favourite toothpaste, and also you would possibly see arduous, white residue, a agency model of the graceful paste you squeeze onto your brush. Many paste supplies, also referred to as dense colloidal suspensions, stiffen as they age. Structural dynamics, or modifications within the hundreds the supplies endure over time, are partly liable for this variation, however for many years, specialists have suspected that there is extra occurring inside these supplies. Now, College of Delaware chemical and biomolecular engineering professor and chair…

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