Influence of Glutaraldehyde Crosslinking and Alkaline Post-treatment on the Properties of Chitosan-Based Films
- 94 Downloads
Depending on the modifications proposed, chitosan films present different characteristics, for instance correlated to hydrophilicity, chemical and mechanical properties. The aim of this study was to evaluate the influence of glutaraldehyde crosslinking and an alkaline post-treatment with NaOH on the characteristics of chitosan based films. Films were obtained by casting and characterized by thickness, swelling degree, mechanical and thermal properties and chemical structure. The water vapor permeability (WVP) was also evaluated for food packaging application. It was observed that crosslinking and NaOH post-treatment have great influence on the chitosan films characteristics. Crosslinking reduced the swelling degree of films and increased its fragility, whereas NaOH treatment also reduces the swelling degree and changes mechanical properties, acting in the same way as a crosslinker. The WVP analyses showed that the basic treatment could substitute the glutaraldehyde crosslinking for film water stability, without greatly compromising the barrier properties of chitosan based films.
KeywordsChitosan Crosslinking NaOH treatment Biodegradable Films
The authors acknowledge the financial support received from the National Council for Scientific and Technological Development (CNPq), the Coordination for the Improvement of Higher Level Personnel (CAPES), and the Research Support Foundation of the State of Rio Grande do Sul (FAPERGS) of Brazil. In particular, to thank CAPES CSF-PVE’s Project, process number 88881.068177/2014-01.
- 2.Mourya VK, Inamdar NN (2008) Chitosan-modifications and applications: opportunities galore. React Funct Polym 68:1013–1051. https://doi.org/10.1016/j.reactfunctpolym.2008.03.002 CrossRefGoogle Scholar
- 5.Pillai CKS, Paul W, Sharma CP (2009) Chitin and chitosan polymers: chemistry, solubility and fiber formation. Prog Polym Sci 34:641–678. https://doi.org/10.1016/j.progpolymsci.2009.04.001 CrossRefGoogle Scholar
- 6.Sencadas V, Correia DM, Ribeiro C et al (2012) Physical-chemical properties of cross-linked chitosan electrospun fiber mats. Polym Test 31:1062–1069. https://doi.org/10.1016/j.polymertesting.2012.07.010 CrossRefGoogle Scholar
- 9.Rinaudo M (2006) Chitin and chitosan: properties and applications. Prog Polym Sci 31:603–632. https://doi.org/10.1016/j.progpolymsci.2006.06.001 CrossRefGoogle Scholar
- 16.Marques JS, Chagas JAOD., Fonseca JLC, Pereira MR (2016) Comparing homogeneous and heterogeneous routes for ionic crosslinking of chitosan membranes. React Funct Polym 103:156–161. https://doi.org/10.1016/j.reactfunctpolym.2016.04.014 CrossRefGoogle Scholar
- 23.Silva RM, Silva GA, Coutinho OP et al (2004) Preparation and characterisation in simulated body conditions of glutaraldehyde crosslinked chitosan membranes. J Mater Sci Mater Med 15:1105–1112. https://doi.org/10.1023/B:JMSM.0000046392.44911.46 CrossRefGoogle Scholar
- 27.Jóźwiak T, Filipkowska U, Szymczyk P et al (2017) Effect of ionic and covalent crosslinking agents on properties of chitosan beads and sorption effectiveness of reactive black 5 dye. React Funct Polym 114:58–74. https://doi.org/10.1016/j.reactfunctpolym.2017.03.007 CrossRefGoogle Scholar
- 28.Tasselli F, Mirmohseni A, Seyed Dorraji MS, Figoli A (2013) Mechanical, swelling and adsorptive properties of dry–wet spun chitosan hollow fibers crosslinked with glutaraldehyde. React Funct Polym 73:218–223. https://doi.org/10.1016/j.reactfunctpolym.2012.08.007 CrossRefGoogle Scholar
- 36.Mamede LC, Caetano BL, Rocha LA et al (2006) Comportamento térmico de alguns fármacos e medicamentos. Rev Ciencias Farm Basica e Apl 27:151–155Google Scholar