Plasticizers
Mostrando 1-12 de 55 artigos, teses e dissertações.
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1. Coating based on breadfruit starch (Artocarpus altilis) for fruit conservation: influence of glycerol, sorbitol, and mannitol as plasticizers
Abstract Polysaccharide-based coatings are an alternative to synthetic coatings for fruit conservation. In this study, we aim to evaluate the physical and chemical characteristics of breadfruit starch for coating using glycerol, sorbitol, and mannitol as plasticizers. We applied coatings composed of 7% starch and 2% plasticizers to cherry tomatoes, and eval
Food Sci. Technol. Publicado em: 11/04/2019
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2. Edible iron yam and maize starch convenient food flavoring packaging films with lemon essential oil as plasticization
Abstract Lemon essential oil was used as plasticizers to prepare iron yam/maize starch edible films. Changes of physical, microcosmic and antimicrobial properties of films were studied. Results showed that the addition of lemon essential oil led to the decrease of moisture content, transparency, whiteness index, water vapor permeability, solubility and tens
Food Sci. Technol. Publicado em: 13/12/2018
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3. Molecular dynamics studies of amylose plasticized with Brazilian Cerrado oils: part I
Abstract Biodegradable 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 import
Polímeros. Publicado em: 28/06/2018
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4. Effect of concentrations of plasticizers on the sol-gel properties developed from alkoxides precursors
Abstract Coatings developed through sol-gel method is presented as an interesting replacement to chromium coating. Sol-gel method present advantages as high purity and excellent distribution of the components. The objective of this work is to synthesize and characterize a film obtained by sol-gel route. The film was prepared with 3-(trimethoxysilylpropyl) me
Polímeros. Publicado em: 2017-12
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5. Thermal and mechanical properties of bio-based plasticizers mixtures on poly (vinyl chloride)
Abstract The use of mixtures of nontoxic and biodegradable plasticizers coming from natural resources is a good way to replace conventional phthalates plasticizers. In this study, two secondary plasticizers of epoxidized sunflower oil (ESO) and epoxidized sunflower oil methyl ester (ESOME) were synthesized and have been used with two commercially available b
Polímeros. Publicado em: 21/09/2017
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6. Development of Starch Biofilms Using Different Carboxylic Acids as Plasticizers
Biodegradable films are widely exploited among scientists nowadays. Their positive environmental impact, besides their potential to promote better food conservation and an increase in shelf life motivate research in this field. Availability, low cost and biodegradability of starch increase the interest of using this material to produce biodegradable films. H
Mat. Res.. Publicado em: 04/12/2015
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7. Biobased additive plasticizing Polylactic acid (PLA)
Polylactic acid (PLA) is an attractive candidate for replacing petrochemical polymers because it is from renewable resources. In this study, a specific PLA 2002D was melt-mixed with two plasticizers: triethyl citrate (TEC) and acetyl tributyl citrate (ATBC). The plasticized PLA with various concentrations were analyzed by differential scanning calorimetry (D
Polímeros. Publicado em: 2015-12
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8. Effect of the Glycerol and Lignin Extracted from Piassava Fiber in Cassava and Corn Starch Films
Several alternatives have been considered to minimize the environmental impact caused by conventional polymers. This study aims to evaluate the chemical, mechanical and morphological properties of flexible thermoplastic films of cassava and corn starch, using glycerol and lignin as plasticizers and reinforcement. The films were produced through casting. It w
Mat. Res.. Publicado em: 23/10/2015
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9. Sorbitol-Plasticized and Neutralized Chitosan Membranes as Skin Substitutes
Chitosan is soluble in diluted acid solutions and can easily form films by casting. However, residual acid neutralization should be performed for biomedical applications what may compromise physical and mechanical properties of the films. Thus, plasticizers can be added to improve these properties. The aim of this study was to characterize morphological, bar
Mat. Res.. Publicado em: 2015-08
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10. Natural additives for poly (hydroxybutyrate - CO - hydroxyvalerate) - PHBV: effect on mechanical properties and biodegradation
In this work, the improvement of mechanical properties in biodegradable materials was obtained through the incorporation of natural and also biodegradable plasticizers and nucleation agents into the PHBV copolymer. PHBV production with different quantities of additives was obtained by extrusion followed by injection. The additives in the copolymer were effic
Mat. Res.. Publicado em: 21/10/2014
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11. The effect of di-(-2-ethyl hexyl) phthalate (Dehp) as plasticizer on the thermal and mechanical properties of pvc/pmma blends
Plasticizers play a key role in the formulation of polymers and in determining their physical properties and processability. This study examines the effect of di(2-ethyl hexyl)phthalate (DEHP) as plasticizer on the thermal and mechanical properties of PVC/PMMA blends. For that purpose, blends of variable composition, from 0 to 100 wt%, were prepared in the p
Polímeros. Publicado em: 2014-08
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12. Synthesis and application of natural polymeric plasticizer obtained through polyesterification of rice fatty acid
This study includes the synthesis of a new natural plasticizer obtained through esterification reaction of rice fatty acid and polyols, its physicochemical characterization and its preliminary application in polyvinyl chloride (PVC). Monopropylene glycol, octanol and diethylene glycol were used as polyols for esterification reaction. Catalyst Fascat® 4100,
Mat. Res.. Publicado em: 18/02/2014