Química Nova (Jan 2007)

Resistência mecânica de hidrogéis termo-sensíveis constituídos de Alginato-Ca2+ / PNIPAAm, tipo Semi-IPN Mechanicals resistance of thermosensitive hydrogels consisting of alginate-Ca2+ / PNIPAAm, type Semi-IPN

  • Gilsinei Marques Campese,
  • Elias Basile Tambourgi,
  • Marcos Rogério Guilherme,
  • Márcia Regina de Moura,
  • Edvani Curti Muniz,
  • Elza Youssef Youssef

DOI
https://doi.org/10.1590/S0100-40422007000700028
Journal volume & issue
Vol. 30, no. 7
pp. 1649 – 1652

Abstract

Read online

Thermosensitive hydrogels were synthesized using alginate-Ca2+ in association with a thermosensitive polymer, such as PNIPAAm. The mechanical properties of the hydrogels were determined measuring the maximum tension of deformation. With the increase of the temperature by 25 to 40 ºC above the LCST the chains of PNIPAAm collapsed, dragging the alginate net and diminishing the size of the pores. The decrease in the size of the pores of the hydrogel was followed by an increase in the mechanicals resistance of the material.

Keywords