Biodegradable starch based nanocomposites with low water vapor permeability and high storage modulus
Nanocomposite materials based on a starch matrix reinforced with very small amounts of multi-walled carbon nanotubes (MWCNTs) (from 0.005 wt% to 0.055 wt%) were developed. The material's dynamic-mechanical and water vapor permeability properties were investigated. An increasing trend of storage...
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2012
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01448617_v87_n3_p1989_Fama http://hdl.handle.net/20.500.12110/paper_01448617_v87_n3_p1989_Fama |
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paper:paper_01448617_v87_n3_p1989_Fama2023-06-08T15:12:14Z Biodegradable starch based nanocomposites with low water vapor permeability and high storage modulus Dynamic mechanical properties Starch-iodine complex Starch-MWCNTs nanocomposites Water vapor permeability Biodegradable starch Contact surface area Dynamic mechanical property Filler contents Filler dispersion Higher temperatures Interfacial adhesions Low water matrix Matrix materials Room temperature Starch-iodine complex Transition zones Water vapor permeability Well-dispersed Adhesion Dynamics Elastic moduli Fillers Glass Glass transition Iodine Multiwalled carbon nanotubes (MWCN) Nanocomposites Reinforced plastics Starch Temperature Water vapor Mechanical permeability Nanocomposite materials based on a starch matrix reinforced with very small amounts of multi-walled carbon nanotubes (MWCNTs) (from 0.005 wt% to 0.055 wt%) were developed. The material's dynamic-mechanical and water vapor permeability properties were investigated. An increasing trend of storage modulus (E′) and a decreasing trend of water vapor permeability (WVP) with filler content were observed at room temperature. For the composite with 0.055 wt% of filler, E′ value was about 100% higher and WVP value was almost 43% lower than the corresponding matrix values. MWCNTs were wrapped in an aqueous solution of a starch-iodine complex before their incorporation into the matrix, obtaining exceptionally well-dispersed nanotubes and optimizing interfacial adhesion. This excellent filler dispersion leads to the development of an important contact surface area with the matrix material, producing remarkable changes in the starch-rich phase glass transition temperature even in composites with very low filler contents. This transition is shifted towards higher temperatures with increasing content of nanotubes. So at room temperature, some composites are in the rubber zone while others, in the transition zone. Therefore, this change in the material glass transition temperature can be taken as responsible for the important improvements obtained in the composites WVP and E′ values for carbon nanotubes content as low as 0.05 wt%. © 2011 Elsevier Ltd. All rights reserved. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01448617_v87_n3_p1989_Fama http://hdl.handle.net/20.500.12110/paper_01448617_v87_n3_p1989_Fama |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Dynamic mechanical properties Starch-iodine complex Starch-MWCNTs nanocomposites Water vapor permeability Biodegradable starch Contact surface area Dynamic mechanical property Filler contents Filler dispersion Higher temperatures Interfacial adhesions Low water matrix Matrix materials Room temperature Starch-iodine complex Transition zones Water vapor permeability Well-dispersed Adhesion Dynamics Elastic moduli Fillers Glass Glass transition Iodine Multiwalled carbon nanotubes (MWCN) Nanocomposites Reinforced plastics Starch Temperature Water vapor Mechanical permeability |
| spellingShingle |
Dynamic mechanical properties Starch-iodine complex Starch-MWCNTs nanocomposites Water vapor permeability Biodegradable starch Contact surface area Dynamic mechanical property Filler contents Filler dispersion Higher temperatures Interfacial adhesions Low water matrix Matrix materials Room temperature Starch-iodine complex Transition zones Water vapor permeability Well-dispersed Adhesion Dynamics Elastic moduli Fillers Glass Glass transition Iodine Multiwalled carbon nanotubes (MWCN) Nanocomposites Reinforced plastics Starch Temperature Water vapor Mechanical permeability Biodegradable starch based nanocomposites with low water vapor permeability and high storage modulus |
| topic_facet |
Dynamic mechanical properties Starch-iodine complex Starch-MWCNTs nanocomposites Water vapor permeability Biodegradable starch Contact surface area Dynamic mechanical property Filler contents Filler dispersion Higher temperatures Interfacial adhesions Low water matrix Matrix materials Room temperature Starch-iodine complex Transition zones Water vapor permeability Well-dispersed Adhesion Dynamics Elastic moduli Fillers Glass Glass transition Iodine Multiwalled carbon nanotubes (MWCN) Nanocomposites Reinforced plastics Starch Temperature Water vapor Mechanical permeability |
| description |
Nanocomposite materials based on a starch matrix reinforced with very small amounts of multi-walled carbon nanotubes (MWCNTs) (from 0.005 wt% to 0.055 wt%) were developed. The material's dynamic-mechanical and water vapor permeability properties were investigated. An increasing trend of storage modulus (E′) and a decreasing trend of water vapor permeability (WVP) with filler content were observed at room temperature. For the composite with 0.055 wt% of filler, E′ value was about 100% higher and WVP value was almost 43% lower than the corresponding matrix values. MWCNTs were wrapped in an aqueous solution of a starch-iodine complex before their incorporation into the matrix, obtaining exceptionally well-dispersed nanotubes and optimizing interfacial adhesion. This excellent filler dispersion leads to the development of an important contact surface area with the matrix material, producing remarkable changes in the starch-rich phase glass transition temperature even in composites with very low filler contents. This transition is shifted towards higher temperatures with increasing content of nanotubes. So at room temperature, some composites are in the rubber zone while others, in the transition zone. Therefore, this change in the material glass transition temperature can be taken as responsible for the important improvements obtained in the composites WVP and E′ values for carbon nanotubes content as low as 0.05 wt%. © 2011 Elsevier Ltd. All rights reserved. |
| title |
Biodegradable starch based nanocomposites with low water vapor permeability and high storage modulus |
| title_short |
Biodegradable starch based nanocomposites with low water vapor permeability and high storage modulus |
| title_full |
Biodegradable starch based nanocomposites with low water vapor permeability and high storage modulus |
| title_fullStr |
Biodegradable starch based nanocomposites with low water vapor permeability and high storage modulus |
| title_full_unstemmed |
Biodegradable starch based nanocomposites with low water vapor permeability and high storage modulus |
| title_sort |
biodegradable starch based nanocomposites with low water vapor permeability and high storage modulus |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01448617_v87_n3_p1989_Fama http://hdl.handle.net/20.500.12110/paper_01448617_v87_n3_p1989_Fama |
| _version_ |
1768542309388910592 |