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Superabsorbent polymer: Polymer that can absorb and retain extremely large amounts of a liquid relative to its own mass. [5] Notes: The liquid absorbed can be water or an organic liquid. The swelling ratio of a superabsorbent polymer can reach the order of 1000:1. Superabsorbent polymers for water are frequently polyelectrolytes.
Fire retardant gel protects a person's hand from a burning fuel. Fire-retardant gels are superabsorbent polymer slurries with a "consistency almost like petroleum jelly." [1] Fire-retardant gels can also be slurries that are composed of a combination of water, starch, and clay.
An upturned vial of hair gel Silica gel. A gel is a semi-solid that can have properties ranging from soft and weak to hard and tough. [1] [2] Gels are defined as a substantially dilute cross-linked system, which exhibits no flow when in the steady state, although the liquid phase may still diffuse through this system.
Surgical lubricants, or medical lubricants, are substances used by health care providers to provide lubrication and lessen discomfort to the patient during certain medical and surgical procedures such as vaginal or rectal examinations.
Let’s be loud and clear at the outset: Topical minoxidil (aka RogaineⓇ) is an effective, research-backed, FDA-approved medication proven to help people with hair loss due to androgenetic ...
Liquid-crystal polymers are present in melted/liquid or solid form. [7] In solid form, the main example of lyotropic LCPs is the commercial aramid known as Kevlar . The chemical structure of this aramid consists of linearly substituted aromatic rings linked by amide groups.
Through heating and pressurization, the liquid solvent reaches its critical point, at which point the liquid and gas phases become indistinguishable. Past this point, the supercritical fluid is converted into the gaseous phase upon an isothermal de-pressurization. This process results in a phase change without crossing the liquid-gas phase ...
In optics, an index-matching material is a substance, usually a liquid, cement (adhesive), or gel, which has an index of refraction that closely approximates that of another object (such as a lens, material, fiber-optic, etc.).