Mechanicals resistance of thermosensitive hydrogels consisting of alginate-Ca2+ / PNIPAAm, type Semi-IPN

Química Nova

Youssef, Elza Youssef¹  Universidade Estadual de Londrina, Londrina, Brasil¹  Tambourgi, Elias Basile¹  Moura, Márcia Regina de¹  Muniz, Edvani Curti¹  Universidade Estadual de Campinas, Campinas, Brasil¹  Universidade Estadual de Maringá, Maringá, Brasil¹  Guilherme, Marcos Rogério¹  Campese, Gilsinei Marques¹ 

关键词: hydrogels;    alginates;    PNIPAAm.;   

DOI  :  10.1590/S0100-40422007000700028

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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.

【 授权许可】

Unknown