CINÉTICA DE HINCHAMIENTO DE HIDROGELES SENSIBLES AL pH BASADOS EN ALMIDÓN Y ÁCIDO ITACÓNICO

Authors

  • Kelly Pernia
  • José Urdaneta
  • Orietta León
  • Haydée Oliva
  • Diana Soto

Abstract

Hydrogels were synthesized by free radical graft copolymerization of itaconic acid (IA) onto corn starch (Alm-g-IA). The redox initiation system potassium permanganate (KMnO4)-sodium bisulfite (NaHSO3) was used. The effect of varying the acid neutralization grade and the concentrations of monomer and initiator was studied and in each case was compared with the  oxidized  starch  (Alm-ox).  Swelling  kinetics  were  obtained  in  deionized  water,  saline  solution  and  buffer  solutions (pH= 4-10,11). In general, copolymers had lower swelling percentage than Alm-ox, which increased with the increment of the  monomer  concentration  and  the  acid  neutralization  and  with  the  decrease  of  the  initiator  concentration.  Hydrogels obtained  with  the  highest  neutralization  percentage  (Alm-g-IA80%)  and  with  the  lowest  initiator  concentration  (Alm-g- IA1/2[I]) presented the highest swelling percentage in water, of 1824 and 1562 %, respectively. Hydrogels were sensitive to pH changes due to the presence of carboxylic acid groups grafted onto starch.

Downloads

Download data is not yet available.

Downloads

Published

2014-04-26

How to Cite

Pernia, K., Urdaneta, J., León, O., Oliva, H., & Soto, D. (2014). CINÉTICA DE HINCHAMIENTO DE HIDROGELES SENSIBLES AL pH BASADOS EN ALMIDÓN Y ÁCIDO ITACÓNICO. LatinAmerican Journal of Metallurgy and Materials, (1), 9–10. Retrieved from https://rlmm.org/ojs/index.php/rlmm/article/view/582

Issue

2014, S6

Section

Supplementary Articles

License

The authors of papers accepted for publication by the RLMM, should recognize the complete transfer of copyright (in all languages) to the RLMM. This transfer includes the right by the RLMM to adapt the article for digital or printed reproduction without altering the written content and information displayed in tables or figures within. The authors retain the copyright and guarantee the journal the right to be the first publication of the work as well as licensed under a Creative Commons Attribution License 4.0 Internacional (CC BY 4.0) which allows others to share the work with an acknowledgment of the authorship of the work and the initial publication in this journal.