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Effect of carboxymethylation conditions on water binding capacity of chitosan-based superabsorbents
Högskolan i Borås, Institutionen Ingenjörshögskolan. (Biotechnology)
Högskolan i Borås, Institutionen Ingenjörshögskolan. (Biotechnology)ORCID-id: 0000-0003-4887-2433
2010 (Engelska)Ingår i: Carbohydrate Research, ISSN 0008-6215, E-ISSN 1873-426X, Vol. 345, nr 18, s. 2683-2689Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A superabsorbent polymer (SAP) from chitosan was provided via carboxymethylation of chitosan, followed by cross-linking with glutaraldehyde and freeze-drying. This work was focused on an investigation of the effects of monochloroacetic acid (MCAA), sodium hydroxide, and reaction time on preparation of carboxymethylchitosan (CMCS). The CMCS products were characterized using FTIR spectroscopy, and their degrees of substitution (DS) were measured using conductimetry and FTIR analysis. The highest DS value was obtained when the carboxymethylation reaction was carried out using 1.75 g MCAA and 1.75 g NaOH per g of chitosan in 4 h. The water solubilities of the CMCS products at various pHs were also evaluated, and the results indicated a significant impact of the reaction parameters on the solubility of CMCS. The CMCSs with the highest DS value resulted in SAPs having the highest water-binding capacity (WBC). TheWBCof the best SAP measured after 10 minexposure in distilled water, 0.9% NaCl solution, synthetic urine, and artificial blood was 104, 33, 30, and 57 g/g, respectively. The WBC of this SAP at pH 2–9 passed a maximum at pH 6.

Ort, förlag, år, upplaga, sidor
Elsevier - Pergamon , 2010. Vol. 345, nr 18, s. 2683-2689
Nyckelord [en]
chitosan, superabsorbents, carboxymethylation
Nyckelord [sv]
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Annan industriell bioteknik Industriell bioteknik
Identifikatorer
URN: urn:nbn:se:hb:diva-2853DOI: 10.1016/j.carres.2010.09.024Lokalt ID: 2320/6941OAI: oai:DiVA.org:hb-2853DiVA, id: diva2:870947
Tillgänglig från: 2015-11-13 Skapad: 2015-11-13 Senast uppdaterad: 2017-12-01Bibliografiskt granskad

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Zamani, AkramTaherzadeh, Mohammad J.

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Carbohydrate Research
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