Selective Oxidation of Corn Starch in TEMPO-Mediated System

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Abstract:

With TEMPO-NaClO-NaBr as the selective oxidation system, the oxidized corn starch was prepared from the corn starch, substituting traditional pre-gelatinized corn starch. The relationship of the carboxyl mass fraction of the oxidized starch and the dosage of oxidant was studied under the conditions such as: the mass of the corn starch was 5.0g, the pH was 10.00, the reaction temperature was 20 °C. The structure of the oxidized corn starch was characterized by IR. The results showed that when the consumption of NaClO was 67.5 mL, the reaction time was 2.5 h, the carboxyl of oxidized starch can reach 10.60%.

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221-224

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October 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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[1] Z. Hu, Preparation of oxidized starch, Journal of Anhui Agricultural Sciences, 39(2011) 2339-2340.

Google Scholar

[2] Y.Q. Tan: Investigation of the starch oxidation mechanism, Farm Products Processing, 97 (2007) 47-51.

Google Scholar

[3] De Nooy A E J, Besemer A C. Highly selective tempo mediated oxidation of primary alcohol groups in polysaccharides, Recueil des Travaux Chimiques des Pays-Bas, 113(1994)165-166.

DOI: 10.1002/recl.19941130307

Google Scholar

[4] Chang P S, Robyt J F. Xidation of Primary Alcohol Groups of Naturally Occurring Polysaccharides with 2, 2, 6, 6-Tetramethyl-1-Piperidine Oxoammonium Ion, Journal of Carbohydrate Chemistry, 15 (1996) 819-830.

DOI: 10.1080/07328309608005694

Google Scholar

[5] Isogai A, Kato Y. Preparation of polyuronic acid from cellulose by TEMPO-mediated oxidation, Cellulose, 5 (1998) 153-164.

Google Scholar

[6] Tahir C, Vignon M R. TEMPO-oxidation of cellulose: synthesis and characterisation of polyglucuronans, Cellulose, 7 (2000), 177-188.

Google Scholar

[7] W.X. Han, W. Wang, W.J. Xu, Study on the selective oxidation of chitosan by TEMPO-NaOCl- NaBr and the structure of its productsSynthetic Technology and Application, 26. (2011), 8-10.

Google Scholar

[8] W.L. Qiu, Z.F. Wang, L.J. Huang, Progress on 2, 2, 6, 6-Tetramethylpiperineoxyl-mediated Oxidation of the Primary Alcohol of Carbohydrate Chemistry, 70(2007) 29-33.

Google Scholar