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dc.contributor.author
Vasti, Cecilia  
dc.contributor.author
Giacomelli, Carla Eugenia  
dc.contributor.author
Rojas Delgado, Ricardo  
dc.date.available
2021-02-12T14:07:32Z  
dc.date.issued
2019-05  
dc.identifier.citation
Vasti, Cecilia; Giacomelli, Carla Eugenia; Rojas Delgado, Ricardo; Pros and cons of coating layered double hydroxide nanoparticles with polyacrylate; Elsevier Science; Applied Clay Science; 172; 5-2019; 11-18  
dc.identifier.issn
0169-1317  
dc.identifier.uri
http://hdl.handle.net/11336/125576  
dc.description.abstract
Preventing the aggregation of layered double hydroxide nanoparticles (LDH-NP) and producing additional functionality are two important objectives for their applications as drug nanocarriers, among others. Adsorption of polyelectrolytes like polyacrylate (PA) is a promising approach to produce protective, functional coatings, but the effect of factors such as chain length, as well as the pros and cons of this strategy, have not been described. In this work, these aspects were studied using LDH-NP intercalated with chloride and benzoate as interlayer probes. The interaction between LDH-NP and PA, as well as the effect in the aggregation of the former, was studied as a function of the molecular weight (MW = 1.2, 8.0 and 450 kDa) and the PA concentration. High MW were more effective for preventing LDH-NP aggregation as well as for minimizing the PA intercalation between the layers. Thus, the 8.0 kDa PA allowed obtaining benzoate intercalated LDH-NP with a particle size around 200 nm that maintained 40% of the exchange sites occupied by benzoate anions. PA coating not only hindered aggregation and changed the particle charge, but also provided new functionality, such as a protective layer towards proton diffusion and, consequently, dissolution of LDH-NP. PA coating is then an effective tool for LDH-NP stabilization and customization, if interlayer anion loss is controlled.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science  
dc.rights
info:eu-repo/semantics/restrictedAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
AGGREGATION  
dc.subject
DISSOLUTION  
dc.subject
ISOELECTRIC POINT  
dc.subject
POLYELECTROLYTE  
dc.subject
STERIC HINDRANCE  
dc.subject
ZETA POTENTIAL  
dc.subject.classification
Química Coloidal  
dc.subject.classification
Ciencias Químicas  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
Pros and cons of coating layered double hydroxide nanoparticles with polyacrylate  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2020-11-17T18:37:46Z  
dc.journal.volume
172  
dc.journal.pagination
11-18  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Vasti, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina  
dc.description.fil
Fil: Giacomelli, Carla Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina  
dc.description.fil
Fil: Rojas Delgado, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina  
dc.journal.title
Applied Clay Science  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0169131719300560  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.clay.2019.02.016