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StructureProperty Relationships of Poly(L-lactic Acid)Mesoporous Silica Nanocomposites
Joint Authors
Medellín-Rodríguez, Francisco J.
Ávila-Orta, Carlos
Sánchez-Valdés, Saúl
Palestino-Escobedo, Alma G.
Gudiño-Rivera, Javier
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-12-24
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Biodegradable poly(L-lactic acid) (PLLA)/mesoporous silica nanocomposites were prepared by grafting L-lactic acid oligomer onto silanol groups at the surface of mesoporous silica (SBA-15).
The infrared results showed that the lactic acid oligomer was grafted onto the mesoporous silica.
Surface characterization of mesoporous silica proved that the grafted oligomer blocked the entry of nitrogen into the mesopores.
Thermal analysis measurements showed evidence that, once mixed with PLLA, SBA-15 not only nucleated the PLLA but also increased the total amount of crystallinity.
Neat PLLA and its nanocomposites crystallized in the same crystal habit and, as expected, PLLA had a defined periodicity compared with the nanocomposites.
This was because the grafted macromolecules on silica tended to cover the lamellar crystalline order.
The g-SBA-15 nanoparticles improved the tensile moduli, increasing also the tensile strength of the resultant nanocomposites.
Overall, the silica concentration tended to form a brittle material.
American Psychological Association (APA)
Gudiño-Rivera, Javier& Medellín-Rodríguez, Francisco J.& Ávila-Orta, Carlos& Palestino-Escobedo, Alma G.& Sánchez-Valdés, Saúl. 2013. StructureProperty Relationships of Poly(L-lactic Acid)Mesoporous Silica Nanocomposites. Journal of Polymers،Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-450842
Modern Language Association (MLA)
Gudiño-Rivera, Javier…[et al.]. StructureProperty Relationships of Poly(L-lactic Acid)Mesoporous Silica Nanocomposites. Journal of Polymers No. 2013 (2013), pp.1-10.
https://search.emarefa.net/detail/BIM-450842
American Medical Association (AMA)
Gudiño-Rivera, Javier& Medellín-Rodríguez, Francisco J.& Ávila-Orta, Carlos& Palestino-Escobedo, Alma G.& Sánchez-Valdés, Saúl. StructureProperty Relationships of Poly(L-lactic Acid)Mesoporous Silica Nanocomposites. Journal of Polymers. 2013. Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-450842
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-450842