Polystyrene/thermoplastic starch blends with different plasticizers

Schlemmer, Daniela; Oliveira, Euclides Reuter de; Sales, Maria J. A.

doi:10.1007/s10973-006-7776-y

Cited by 74 publications

(48 citation statements)

References 19 publications

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“…The fatty acids were manually inserted into the cells, near the amylose oligomers, in the proportions as close as possible to those found in the buriti and pequi oils. The unit cells were filled by water molecules ranging around 2000 to 4000 molecules in explicit solvent model, to simulate the experimental conditions carried out in previous studies [2,7,10] , where the components of the system were dispersed in distilled water. .…”

Section: Specificities For the Calculation Protocol Of Amylosefatty Amentioning

confidence: 99%

“…A common approach for improving starch film ability is plasticization, which can be efficiently and environmentally friendly achieved with small amounts of vegetable oils [9] and its fatty acids [2,7,[10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

“…They have proved to efficiently plasticize starch and enable fabrication of films by casting [2,3,7,11] . A step further consisted on the preparation of bionanocomposites of plasticized starch and lamellar oxides, such as montimorillonite clay, for improved thermal and barrier properties [1,2,7,8,10,12] . Therefore, plasticization is an essential step to allow the use of starch in advanced biodegradable materials [2,3,7,12] .…”

Section: Introductionmentioning

confidence: 99%

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Molecular dynamics studies of amylose plasticized with Brazilian Cerrado oils: part I

et al. 2018

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ObstractBiodegradable polymers have become part of the realm of polymer science with specially when associated to renewable sources. Unraveling the plasticizer effect of natural occurring fatty acids in the Brazilian Cerrado on amylose oligomers was aimed in this work in an aqueous environment. Since the interactions within a material are of extreme importance to its molecular behavior, the main focus was directed to the molecular interactions whether intra or intermolecular type. Molecular Mechanics and Dynamics were carried out to shed light on this issue. The simulation results suggest the fatty acids could perform as efficient plasticizers for more complex polysaccharides such as starch. It also highlights the importance the solvation on the system stabilization, thus contributing to a clearer understanding of the chemical interactions role on plasticization. Our results provide a basis for simulating more complex systems such as a clay-mineral which will culminate in the parameterization for mesoscale studies.

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Section: Specificities For the Calculation Protocol Of Amylosefatty Amentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Molecular dynamics studies of amylose plasticized with Brazilian Cerrado oils: part I

et al. 2018

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“…The edible coatings were prepared following Schlemmer et al [17]. First, starch, water, and glycerol were mixed in a 50:15:35 ratio (w/w/w) for 15 min.…”

Section: Preparation Of the Edible Coatingsmentioning

confidence: 99%

Towards Drylands Biorefineries: Valorisation of Forage Opuntia for the Production of Edible Coatings

Nájera-García¹,

López-Hernández²,

Lucho-Constantino³

et al. 2018

Sustainability

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Abstract:Species of the genus Opuntia may be a well-suited feedstock for biorefineries located in drylands, where biomass is scarcer than in humid or temperate regions. This plant has numerous uses in Mexico and Central America, and its mucilage is a specialty material with many promising applications. We extracted the mucilage from a forage species, O. heliabravoana Scheinvar, and mixed it with a thermoplastic starch to produce an edible coating. The coating was applied to blackberries, which were then evaluated in terms of several physicochemical and microbiological variables. During a 10-day evaluation period, the physicochemical variables measured in the coated fruits were not significantly different from those of the control group. However, the microbiological load of the coated fruits was significantly lower than that of the uncoated fruits, which was attributed to a decreased water activity under the edible coating. Multivariate analysis of the physicochemical and microbial variables indicated that the storage time negatively affected the weight and size of the coated and uncoated blackberries. Although some sensory attributes have yet to be optimised, our results support the use of the mucilage of forage Opuntia for the formation of edible coatings, as well as their valorisation through a biorefinery approach.

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“…In view of this, above mentioned aspects have been studied using PS/PMMA blends and their CdS nanocomposites (PS/ PMMA/CdS). PS and PMMA both are well known due to their various commercial and domestic applications and stand as primary industrial polymeric materials [18,19]. The study shows that the incorporation of dispersed CdS nanoparticles in PS/PMMA blend matrix significantly alter their glass transition behaviour, thermal conductivity and tensile properties.…”

Section: Introductionmentioning

confidence: 96%

Evaluation of Morphological Effect on Thermal and Mechanical Performance of PS/PMMA/CdS Nanocomposite Systems

Mathur¹,

Sharma²

2013

ANP

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In the present paper an effort has been made to investigate effect of dispersion of CdS nanoparticles on the thermal and mechanical properties of PS/PMMA blends. Samples have been prepared through dispersion of CdS nanoparticles (prepared separately) during solution casting blend fabrication processing. These nanocomposites samples are structurally characterized through Wide angle X-ray Scattering (WAXS) and Small Angle X-ray Scattering (SAXS) techniques. Scanning Electron Microscopy (SEM) analyses of these samples have been carried out in lieu of surface morphological characterization. The measurements of glass transition temperature and stress-strain analyses have been performed through Dynamic Mechanical Analyzer (DMA). The thermal conductivity of nanocomposite samples has been determined using Hot Disk Thermal Constants Analyzer. The study shows that the incorporation of dispersed CdS nanoparticles in PS/PMMA blend matrix significantly alter their glass transition behaviour, thermal conductivity and tensile properties.

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Polystyrene/thermoplastic starch blends with different plasticizers

Cited by 74 publications

References 19 publications

Molecular dynamics studies of amylose plasticized with Brazilian Cerrado oils: part I

Molecular dynamics studies of amylose plasticized with Brazilian Cerrado oils: part I

Towards Drylands Biorefineries: Valorisation of Forage Opuntia for the Production of Edible Coatings

Evaluation of Morphological Effect on Thermal and Mechanical Performance of PS/PMMA/CdS Nanocomposite Systems

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