Structural Insight into Chitosan Supports Functionalized with Nanoparticles

The incorporation of suspensions of nanoparticles functionalized with gallic acid (GA) was used as a strategy to obtain nanocomposite active films with different both, chitosan: tripolyphosphate (CH:TPP) and nanoparticles:chitosan (N:CH) ratios. The thermal analysis carried out by modulated differen...

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Autores principales: Lamarra, Javier Andrés, Damonte, Laura Cristina, Rivero, Sandra, Pinotti, Adriana
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Química
Nanoparticles
Chitosan 
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/97498
https://ri.conicet.gov.ar/11336/86923
https://www.hindawi.com/journals/amse/2018/3965783/
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-97498
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Nanoparticles
Chitosan 
spellingShingle Química
Nanoparticles
Chitosan 
Lamarra, Javier Andrés
Damonte, Laura Cristina
Rivero, Sandra
Pinotti, Adriana
Structural Insight into Chitosan Supports Functionalized with Nanoparticles
topic_facet Química
Nanoparticles
Chitosan 
description The incorporation of suspensions of nanoparticles functionalized with gallic acid (GA) was used as a strategy to obtain nanocomposite active films with different both, chitosan: tripolyphosphate (CH:TPP) and nanoparticles:chitosan (N:CH) ratios. The thermal analysis carried out by modulated differential scanning calorimetry (MDSC) allowed observing the shift of an endothermic event towards higher temperatures with a greater N:CH ratio. Analyzing ATR-FTIR spectra through-principal component analysis (PCA) can be inferred that the incorporation of the nanoparticles produced a discrimination of the samples into clusters when the region 1400-1700 cm-1 was considered.The decrease in crystalline size with the inclusion of nanoparticles (NA and NB), proved the existence of interactions among CH, TPP, and GA, resulting in a more amorphous structure. The positron annihilation lifetime spectroscopy (PALS) technique was adequate to correlate the glass transition temperatures (Tg) obtained by using the MDSC technique with parameters τ2 and I2 ascribed to the annihilation of positrons in the interface.The cross-section of nanocomposites obtained by scanning electron microscopy (SEM) clearly showed a homogeneous distribution of the nanoparticles without aggregation suggesting their compatibility with the CH matrix. By virtue of the obtained results, the nanocomposites with the greatest nanoparticle proportion and the highest TPP concentration attained significant modifications in relation to CH matrices, because of the crosslinking of the biopolymer with GA and TPP.
format Articulo
Articulo
author Lamarra, Javier Andrés
Damonte, Laura Cristina
Rivero, Sandra
Pinotti, Adriana
author_facet Lamarra, Javier Andrés
Damonte, Laura Cristina
Rivero, Sandra
Pinotti, Adriana
author_sort Lamarra, Javier Andrés
title Structural Insight into Chitosan Supports Functionalized with Nanoparticles
title_short Structural Insight into Chitosan Supports Functionalized with Nanoparticles
title_full Structural Insight into Chitosan Supports Functionalized with Nanoparticles
title_fullStr Structural Insight into Chitosan Supports Functionalized with Nanoparticles
title_full_unstemmed Structural Insight into Chitosan Supports Functionalized with Nanoparticles
title_sort structural insight into chitosan supports functionalized with nanoparticles
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/97498
https://ri.conicet.gov.ar/11336/86923
https://www.hindawi.com/journals/amse/2018/3965783/
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AT damontelauracristina structuralinsightintochitosansupportsfunctionalizedwithnanoparticles
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AT pinottiadriana structuralinsightintochitosansupportsfunctionalizedwithnanoparticles
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