Synthesis of superabsorbents from Amaranthus starch

A mixture of acrylamide (AM) and acrylic acid (AA) monomers was grafted on gelatinized Amaranthus starch using potassium persulfate (KPS) as an initiator to yield superabsorbent. The effects of different parameters such as time, temperature, monomer feed (AM:AA), starch:monomers ratio and initiator...

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Bibliographic Details
Published inCarbohydrate polymers Vol. 81; no. 3; pp. 695 - 699
Main Authors Teli, M.D., Waghmare, Nilesh G.
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 07.07.2010
Elsevier
Subjects
Amaranthus starch
Applied sciences
Exact sciences and technology
Grafting
Natural polymers
Physicochemistry of polymers
Starch and polysaccharides
Starch extraction
Superabsorbent
Amaranthus starch
Starch extraction
Grafting
Superabsorbent
Acrylic acid copolymer
Absorbent material
Starch
Starch graft copolymer
Amaranthaceae
Absorptivity
Experimental study
Property processing relationship
Optimization
Operating conditions
Bigraft copolymer
Dicotyledones
Preparation
Angiospermae
Acrylamide copolymer
Amaranthus
Oside polymer
Spermatophyta
Water absorption
Heterogeneous reaction
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Summary:A mixture of acrylamide (AM) and acrylic acid (AA) monomers was grafted on gelatinized Amaranthus starch using potassium persulfate (KPS) as an initiator to yield superabsorbent. The effects of different parameters such as time, temperature, monomer feed (AM:AA), starch:monomers ratio and initiator concentration on graft add-on were studied, and the optimized values were found to be 2 h, 65 °C, 1:1 (w/w), 1:1(w/w) and 1% (with respect to starch powder) respectively. The product so formed was saponified with 0.1N NaOH, dried and finely powdered sample was characterized using FTIR, TGA, and XRD. Product showed maximum absorbency of 155 g/g, qualifying itself to be called as superabsorbent.
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2010.03.037