Barrier and Mechanical Properties of Clay-Reinforced Polymeric Nanocomposites

Moura, Márcia R. de; Aouada, Fauze A.; Zucolotto, Valtencir; Mattoso, Luiz H. C.

doi:10.1080/03602559.2011.578296

Cited by 31 publications

(29 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Higher clay loading did not give significant changes in gas permeability. It was proved that the increase in the population of clay platelets lengthens the pathway of gas molecules through the film thickness [5,6,34] . Based on the results of Figure 6b, the increase of TiO 2 content showed an unclear trend on CO 2 gas permeability.…”

Section: Resultsmentioning

confidence: 99%

The TiO₂–Clay-LDPE Nanocomposite Packaging Films: Investigation on the Structure and Physicomechanical Properties

Moghaddam

Khoshtaghaza

Salimi

et al. 2014

Polymer-Plastics Technology and Engineering

View full text Add to dashboard Cite

The role of nanoclays and TiO 2 nanoparticle loadings were investigated on low density polyethylene crystalline structure, in addition to studying packaging film properties such as barrier, thermal and mechanical properties. The polymer crystal study indicated for the orthorhombic crystal phase and about 20% lower degree of crystallinity for nanocomposites containing more than 2 wt.% TiO 2 nanoparticles. Based on the X-ray diffraction technique, the dispersion of nanoclays was improved to almost good degree of clay exfoliation with the company of 4 wt.% TiO 2 nanoparticles. In agreement with XRD results, the TEM morphological studies mainly suggest that TiO 2 has a helpful effect on nanoclay exfoliation. The increase in degradation temperature of nanocomposites may be attributed to the formation of inorganic char on polymer melt. The barrier properties of TiO 2 /clay nanocomposite packaging films depend mainly on nanoclay loading with an unclear trend from TiO 2 nanoparticles. The increase in elastic modulus and the yield stress of nanocomposite films showed great effects on film mechanical properties by nanoclays.

show abstract

Section: Resultsmentioning

confidence: 99%

The TiO₂–Clay-LDPE Nanocomposite Packaging Films: Investigation on the Structure and Physicomechanical Properties

Moghaddam

Khoshtaghaza

Salimi

et al. 2014

Polymer-Plastics Technology and Engineering

View full text Add to dashboard Cite

show abstract

“…A presença das gotículas nanoemulsionadas faz com que a matriz apresente um aumento significativo na elongação. O aumento na elongação provoca melhora na tenacidade dos filmes, fator interessante na aplicação como embalagem [19] . Na Figura 2 é apresentada a microscopia eletrônica de varredura (MEV) do nanobiocompósito contendo nanoemulsão sintetizada com base no método 7 e da matriz contendo apenas pectina.…”

Section: Resultsunclassified

Preparação de novos nanobiocompósitos comestíveis ativos contendo nanoemulsão de canela e pectina

et al. 2014

View full text Add to dashboard Cite

Resumo: Neste trabalho, o objetivo foi produzir nanobiocompósitos biodegradáveis à base de pectina e nanoemulsão de canela que tenham propriedades satisfatórias para aplicação como embalagens ativas. Foram detalhados os procedimentos de preparação das nanoemulsões e incorporação dessas na matriz polimérica. Foi apresentada uma metodologia nova de análises dos melhores nanocompósitos através de um planejamento baseado em aspectos visuais que nos forneceu resultados interessantes. Os nanocompósitos obtidos foram analisados através de: medidas de espessura, solubilidade, propriedades mecânicas e microscopia eletrônica de varredura (MEV). Resultados das análises visuais mostraram que os nanocompósitos produzidos com concentração de pectina de 2% m/v e nanoemulsões preparadas com velocidade de agitação de 16000 rpm em 2 minutos mostraram melhores condições para serem aplicados como embalagens. Resultados de propriedades mecânicas demonstraram que nanocompósitos contendo nanoemulsões com tamanhos menores de gotículas apresentam maior resistência e elongação, além de serem menos solúveis. O controle dessas propriedades com a variação de tamanho médio das nanoemulsões torna esses materiais potencialmente viáveis, por exemplo, em embalagens ativas. Palavras-chave: Nanoemulsão, nanocompósito polimérico, pectina, óleo essencial de canela. Preparation of New Active Edible Nanobiocomposite Containing Cinnamon Nanoemulsion and PectinAbstract: In this study, the objective was to produce biodegradable nanobiocomposites based on pectin and cinnamon nanoemulsion having satisfactory properties for application as active packaging. Procedures for preparing and incorporating these nanoemulsions in the polymeric matrix are described. The nanocomposites were analyzed through: thickness measurements, solubility, mechanical properties and scanning electron microscopy (SEM). A subjective analysis indicated the nanocomposite made with pectin 2 % w/v and nanoemulsions prepared with stirring speed of 16000 rpm in 2 min was the most suitable for application in packaging. The nanocomposites containing nanoemulsions with smaller nanodroplets had greater strength and elongation, being less soluble. The control of these properties by varying the average size of the nanoemulsion makes these materials potentially viable, for example, for active packaging. Keywords: Nanoemulsion, polymeric nanocomposite, pectin, cinnamon essential oil. IntroduçãoA nanotecnologia é uma aplicação da nanociência que aparece praticamente em todos os setores da ciência. Na área de alimentos o elevado investimento na parte de embalagens tem reforçado a idéia de que produtos nanotecnológicos proporcionam vantagens reais aos consumidores [1,2] . De maneira bem didática podemos afirmar que a função primordial de uma embalagem é acondicionar o produto de forma a permitir todas as outras operações que fazem parte do processo de distribuição física, ou seja, levar o produto acabado até o cliente final. Complementando esta função temos que a embalagem do produto serve para a pro...

show abstract

“…Recently, biodegradable and bio-based polymer / clay nanocomposites, for example PLA, PCL and PBS, have been used as packaging, especially for food and also for short shelflife products, such as containers, beverage cups and blister packages [16,57,63,65,66,116]. Some other potential applications for polymer / clay nanocomposites that possess good water barrier properties are protective coatings, adhesives, moulding compounds and dielectric materials for electronic applications, which also require high thermal stability and good mechanical properties of the polymer [28,69]. PBI / clay nanocomposites have been used for membranes, for example, reverse osmosis membranes in sea and brine water desalination, and also developed for organic liquid fluid barrier applications [54].…”

Section: Applicationsmentioning

confidence: 99%

A review of the water barrier properties of polymer/clay and polymer/graphene nanocomposites

Tan

Thomas

2016

Journal of Membrane Science

291

140

View full text Add to dashboard Cite

This paper reviews the literature on moisture barrier properties of polymer/clay and polymer/graphene-based nanocomposites. The various models proposed to predict the effects of nanofillers in reducing water vapour permeability through polymers are outlined. These models are based on a range of different factors such as; tortuosity, geometry, platelet stacking, orientation, polymer chain confinement and plasticization.Published experimental studies of water vapour permeability in both polymer/clay and polymer/graphene nanocomposites are then reviewed. The extent to which the models are validated by the results of these studies is discussed, together with the degree to which the potential for water barrier improvement in polymer nanocomposites has been realised.

show abstract

Barrier and Mechanical Properties of Clay-Reinforced Polymeric Nanocomposites

Cited by 31 publications

References 27 publications

The TiO₂–Clay-LDPE Nanocomposite Packaging Films: Investigation on the Structure and Physicomechanical Properties

The TiO₂–Clay-LDPE Nanocomposite Packaging Films: Investigation on the Structure and Physicomechanical Properties

Preparação de novos nanobiocompósitos comestíveis ativos contendo nanoemulsão de canela e pectina

A review of the water barrier properties of polymer/clay and polymer/graphene nanocomposites

Contact Info

Product

Resources

About

Barrier and Mechanical Properties of Clay-Reinforced Polymeric Nanocomposites

Cited by 31 publications

References 27 publications

The TiO2–Clay-LDPE Nanocomposite Packaging Films: Investigation on the Structure and Physicomechanical Properties

The TiO2–Clay-LDPE Nanocomposite Packaging Films: Investigation on the Structure and Physicomechanical Properties

Preparação de novos nanobiocompósitos comestíveis ativos contendo nanoemulsão de canela e pectina

A review of the water barrier properties of polymer/clay and polymer/graphene nanocomposites

Contact Info

Product

Resources

About

The TiO₂–Clay-LDPE Nanocomposite Packaging Films: Investigation on the Structure and Physicomechanical Properties

The TiO₂–Clay-LDPE Nanocomposite Packaging Films: Investigation on the Structure and Physicomechanical Properties