Synthesis and characterization of cassava starch with maleic acid derivatives by etherification reaction

Carbohydrate Polymers
Samuel H ClasenAlfredo T N Pires

Abstract

Cassava starch was grafted with three different esters by the etherification reaction and its modification was characterized by1H NMR, FTIR, DSC, SEM, XDR, contact angle and SLS. The samples grafted with diethyl maleate, dipropyl maleate, and dibutyl maleate showed DS values of 2.3, 1.0 and 2.0, respectively, determined from1H NMR analysis and confirmed by FTIR analysis, with the appearance of bands at 1721, 1550 and 1126cm-1. The FTIR, XRD, SEM and DSC results indicated a change in the intra and intermolecular hydrogen interactions in the grafted starch when compared to native starch. Based on the contact angles, it was observed that the macromolecular starch chain acquired hydrophobic characteristics through the substitution of the hydrogens with di maleate esters. The characteristics acquired by grafted starch allow it to be used for the encapsulation of bioactive molecules for the production of bioactive packages and the production of biodegradable packages.

References

May 26, 2011·Journal of Agricultural and Food Chemistry·Morgan J TizzottiRobert G Gilbert
Apr 9, 2014·Carbohydrate Polymers·Kamolwan IsrakarnParichat Hongsprabhas
Apr 23, 2014·Carbohydrate Polymers·Chutarat Kowittaya, Namfone Lumdubwong
Jul 1, 2014·BioMed Research International·Rihui LinWenqin Huang
Aug 19, 2014·Carbohydrate Polymers·Obiro Cuthbert WokadalaSuprakas Sinha Ray
Sep 7, 2014·International Journal of Biological Macromolecules·Ying Feng ZuoYanhua Zhang
Sep 16, 2014·Ultrasonics Sonochemistry·Muthupandian Ashokkumar
Oct 21, 2014·Journal of Food Science and Technology·Lúcia Helena GarridoIvo Mottin Demiate
Dec 3, 2014·Carbohydrate Polymers·Jun Liang, Richard D Ludescher

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