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Title

Humidity-activated shape memory effect on plasticized starch-based biomaterials

AuthorsSessini, Valentina; Arrieta, Marina P.; Fernández-Torres, Alberto ; Peponi, Laura
KeywordsHumidity
Bending
Catechin
Shape memory
Starch
Issue Date2018
PublisherElsevier
CitationCarbohydrate Polymers 179: 93-99 (2018)
AbstractHumidity-activated shape memory behavior of plasticized starch-based films reinforced with the innovative combination of starch nanocrystals (SNCs) and catechin as antioxidant were studied. In a previous work, we reported the processing of gelatinized starch-based films filled with SNCs and catechin as antioxidant agent, and we observed that this novel combination leads to starch-based film with enhanced thermal and mechanical performance. In this work, the humidity-activated shape memory behavior of the previous developed starch-based films was characterized. The moisture loss as well as the moisture absorption were studied since they are essential parameters in humidity-activated shape memory polymers to fix the temporary shape and to recover the original shape, respectively. Therefore, the effect of the incorporation of SNCs and catechin on the humidity-activated shape memory properties of plasticized starch was also studied. Moreover, the effectiveness of catechin to increase the polymer stability under oxidative atmosphere and the thermo-mechanical relaxation of all the starch-based materials were studied. The combination of plasticized starch matrix loaded with both, SNCs and catechin, leads to a multifunctional starch-based films with increased hydrophilicity and with excellent humidity-activated shape memory behavior with interest for potential biomedical applications.
Publisher version (URL)http://dx.doi.org/10.1016/j.carbpol.2017.09.070
URIhttp://hdl.handle.net/10261/160386
Identifiersdoi: 10.1016/j.carbpol.2017.09.070
issn: 0144-8617
e-issn: 1879-1344
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