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Josepha Yohanna de Jesus, Eliane Santos de Carvalho Dantas, Mairim Russo Serafini, Paula dos Passos Menezes, Juliana Cordeiro Cardoso, Ricardo Luiz Cavalcanti Albuquerque-Jr, Jivaldo do Rosário Matos, Juliana Ferreira de Oliveira. Irwin Rose Alencar de Menezes, Francilene Amaral da Silva, Adriano Antunes de Souza Araújo
Journal of Thermal Analysis and Calorimetry March 2016, Volume 123, Issue 3, pp 2003–2012
Publication year: 2015

Abstract

The purpose of this study was to evaluate the physicochemical properties and kinetic analyses of membranes obtained through the dispersion of pectin PEC (2 %), with or without the extract of Morinda citrifolia Linn EMC2.5 and 5.0 % in distilled water, and adding plasticizer propylene glycol (20 %). The thickness of the membranes was significantly different, and at SEM images of PEC2.5 %, they showed a more compact structure compared with other membranes. PEC5.0 % membrane showed the best values of mechanical properties. The DSC curve of EMC showed two endothermic events, and the DSC curves of the membranes presented two endothermic events and two exothermic events with profiles similar to PEC, PEC2.5 and PEC5.0 % membranes. A kinetic study was performed with thermogravimetry using the Ozawa method and non-Arrhenius methods. The kinetic parameters showed that the PEC and PEC5.0 % present a similar thermal stability. Thus, the Morinda citrifolia extract influences a more organized membrane structure, and the PEC-EMC2.5 % has the best characteristics for the development of a membrane with healing effect.

Keywords

Membranes, Pectin, Physicochemical properties, Morinda citrifolia 

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