Superabsorbent polymer uses Superabsorbent polymers are primarily used as an absorbent for water and aqueous solutions for diapers, adult incontinence products, feminine hygiene products,…
Suspension polymerization uspension polymerization, sometimes called bead, pearl or granular polymerization, is one of the most widely used polymerization techniques. It is essentially a…
Solution polymerization Solution polymerization is a method of industrial polymerization. In this procedure, a monomer is dissolved in a non-reactive solvent that contains a…
Gel polymerization A mixture of acrylic acid, water, cross-linking agents and UV initiator chemicals are blended and placed either on a moving belt or…
Copolymer chemistry Copolymer, any of a diverse class of substances of high molecular weight prepared by chemical combination, usually into long chains, of molecules…
Superabsorbent Polymer History Until the 1920s, water absorbing materials were fiber-based products. Choices were tissue paper, cotton, sponge, and fluff pulp. The water absorbent…
Superabsorbent Polymer Superabsorbent polymer (SAP) (also called slush powder) can absorb and retain extremely large amounts of a liquid relative to its own mass….
Recent Posts
Buy this domain
Recent Comments
Water-absorbent
Water-absorbent polymers or hydrogels, sometimes defined as superabsorbent polymers (SAP) in the literature, are water-insoluble hydrophilic polymers, able to swell and absorb amounts of water, saline solutions, or physiological fluids as high as 10-1000 times their own weight.
They consist of polyelectrolytes or other highly hydrophilic polymeric matrices, usually bearing crosslinking sites along the macromolecular chains in order to avoid dissolution. These polymers generally contain carboxylic groups that are in equilibrium with their dissociated form in the presence of water or carboxylate groups. The polymer coils extend themselves and widen in consequence of the electrostatic repulsion of negative charges. Carboxylate groups are also able to interact through hydrogen bonding with additional quantities of water. The presence of crosslinking allows swelling of the three-dimensional network and gel formation without polymer dissolution.
Recent Comments