Absorbent Polymer Technology by Lisa Brannon-Peppas

By Lisa Brannon-Peppas

In recent times, there was a veritable explosion of study and improvement in consumer-oriented fields that make the most of polymeric fabrics which soak up quite a lot of water. those fields surround the education, characterization and commercialization of separation structures, pharmaceutical and private care items corresponding to toddler diapers, female items, incontinence items and plenty of different similar components. The polymeric fabrics used in those purposes are referred to as absorbent or superabsorbent fabrics due to their skill to swell speedily and to maintain huge volumes of water, urine and different organic fluids. the purpose of this e-book is to introduce the basics of polymer constitution and swelling as on the topic of polymers used for those superabsorbent fabrics. within the box of absorbence, specific consciousness is given to crosslinked buildings which swell to greater than fifty occasions their preliminary weight in water or electrolytic options. The publication additionally offers descriptions of novel functions of superabsorbent fabrics in addition to a close research of water shipping in crosslinked polymers

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Drying this polymer yielded a water insoluble polymer that absorbed hundreds of times its dry weight in water. Reid [35] prepared graft polymers from polysaccharides such as cellulose or starch and acrylamide with acrylic acid and a crosslinker such as MBA. The polymerization was conducted as a suspension polymerization in an aromatic hydrocarbon with a minor amount of methanol. Initiation was by conventional redox systems such as persulfate/bisulfite. Patentable features were the use of the suspension type process and the use of a crosslinker.

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The HLB of the specific agent used helped control the shape of the polymeric particle formed. In an example, HLB of 2-6 yielded 100-500 micron beads, HLB of 6-16 yielded 100-500 micron granules and HLB of less than 2 gave lumps. Some very interesting gel-strength qualities were noted in a table. Stanley et al. [30] disclosed a suspension polymerization process for sodium polyacrylate absorbents, which employed a combination of hydrophobic silica and a copolymer of acrylic acid and laurylmethacrylate as the suspending agents.

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