Instituto de Investigaciones para la Industria Química (INIQUI-CONICET), Facultad de Ingeniería, Universidad Nacional de Salta, Av. Bolivia 5150, A4408FVY Salta, Argentina.
Instituto de Investigaciones para la Industria Química (INIQUI-CONICET), Facultad de Ingeniería, Universidad Nacional de Salta, Av. Bolivia 5150, A4408FVY Salta, Argentina.
Int J Biol Macromol. 2019 Feb 15;123:784-791. doi: 10.1016/j.ijbiomac.2018.11.038. Epub 2018 Nov 8.
A hydrogel is a three-dimensional network formed by flexible chains of polymers that absorb considerable amounts of water. The objectives of this work were to formulate hydrogels from pectin and brea gum and to study their functional properties. Brea gum solutions present positive charge below pH = 3.5. Pectin has anionic character due to uronic acids. Hydrogels were formulated from pectin and brea gum solutions. DSC and FTIR confirmed the existence of strong interaction between both polymers. Rheological and texture profiles indicated that hydrogels behaved as a strong gels. Swelling and erosion were dependent on the pH values of the medium. The release of a dye molecule from the hydrogel was controlled by a Fickian diffusion mechanism. The capability of these hydrogels to respond to the changes in pH of the medium and to modify dye release, could be valuable for medical, food and industrial uses.
水凝胶是由聚合物柔性链形成的三维网络，可吸收大量的水。本工作的目的是从果胶和乳香胶中制备水凝胶，并研究其功能特性。乳香胶溶液在 pH = 3.5 以下带正电荷。果胶由于存在糖醛酸而具有阴离子特性。从果胶和乳香胶溶液中制备水凝胶。DSC 和 FTIR 证实了两种聚合物之间存在强烈的相互作用。流变学和质构分析表明水凝胶表现出强凝胶的行为。溶胀和侵蚀取决于介质的 pH 值。染料分子从水凝胶中的释放受菲克扩散机制控制。这些水凝胶能够响应介质 pH 值的变化并调节染料释放的能力，在医学、食品和工业用途中可能具有重要价值。
