In this work, the miscibility of blends thermoplastic Achira Starch (AS) and polylactic acid (PLA) was evaluated, assisted by Pluronic® F127 an amphiphilic triblock copolymer that acts as a surfactant promotes reduction surface tension among AS PLA in solution emulsion stabilization. Different formulations AS/PLA were obtained at 75:25, 50:50, 25:75 containing 0 %, 4 8 % F127, glycerol used plasticizer. Solvent casting method to obtain blended polymeric films, which characterized Scanning...

Packaging materials based on biodegradable polymers are a viable alternative to replace conventional plastic packaging from fossil origin. The type of plasticizer used in these affects their functionality and performance. effect different plasticizers such as glycerol (GLY), sorbitol (SOR), poly(ethylene glycol) (PEG) concentrations 5%, 10%, 15% (w/w) the structural features functional properties starch/PVOH/chitosan films was evaluated. incorporation increased thickness composite films....

Packaging materials play an essential role in the preservation and marketing of food other products. To improve their conservation capacity, antimicrobial agents that inhibit bacterial growth are used. Biopolymers such as starch chitosan a sustainable alternative for generation films packaging can also serve support preservatives agents. These substances replace synthetic origin maintain good functional properties to ensure quality Films based on mixture corn were developed by casting method...

One of the critical processing parameters—the speed extrusion process for plasticized poly (lactic acid) (PLA)—was investigated in presence acetyl tributyl citrate (ATBC) as plasticizer. The mixtures were obtained by varying content plasticizer (ATBC, 10–30% weight), using a twin screw extruder medium which temperature profile with peak was established that ended at 160 °C, two mixing zones and different rotation speeds (60 150 rpm). To evaluate thermo-mechanical properties blend...

The preparation and characterization of biodegradable films based on starch-PVA-nanoclay by solvent casting are reported in this study. were prepared with a relation 3:2 starch:PVA nanoclay (0.5, 1.0, 1.5% w/v), glycerol as plasticizer. nanoclays before being incorporated the filmogenic solution starch-PVA dispersed two ways: magnetic stirring sonication. SEM results suggest that sonication is necessary to reach good dispersion along polymeric matrix. FTIR 1.0 w/v sonicated strong...

Miscibility in biopolymeric blends is a critical process that requires evaluation of the effect surfactants or coupling agents under conditions similar to processing. Different mixtures molten state plasticized starch and polylactic acid presence surfactant (Tween 20) at different concentrations were studied. This allowed knowing rheological, thermal surface behavior mixtures. The results dynamic rheological analysis showed increases viscosity surfactant, which strong interactions produced...

This work aimed to evaluate the effect of incorporating a type model active pharmaceutical ingredient in an orally disintegrating film (ODF) based on starch and chitosan physicochemical thermodynamic surface properties. The ODFs were formed using solvent casting method, with thickness 0.04 mm. Chemical analysis performed by vibrational spectroscopy showed strong intermolecular interactions between components polymeric matrix. XRD structural confirmed these from decrease crystallinity...

Due to advances in edible films based on polysaccharides that can carry an active pharmaceutical ingredient (API), these now provide rapid and effective release upon consumption. These alternative conventional drug delivery methods are known as orally disintegrating (ODFs). This study aimed evaluate the capacity of film composed starch, chitosan, maltodextrin API while maintaining its physicochemical surface properties. Acetaminophen, a hydrophilic drug, was selected model incorporated into...

Starch is a biopolymer with enormous potential for generating new biodegradable packages due to its easy availability and low cost. However, weak functional properties, limitation of interaction some hydroxyl groups evaluation blends other polymers are necessary in order improve performance. Glycerol-plasticized acetylated corn starch films were developed using the casting method, impact incorporating chitosan (TPS:CH) various proportions (75:25, 50:50, 25:75 v/v) was studied present...

This study explores the reprocessing behavior of polypropylene-sugarcane bagasse biocomposites using neat and chemically treated fibers (20 wt.%). Biocomposites were reprocessed 5 times extrusion process followed by injection molding. The mechanical properties indicate that microfibers addition chemical treatments generate improvements in properties, reaching highest performance third cycle where flexural modulus strength increase 57 12% comparison with PP. differential scanning calorimetry...

Thermoplastic biofilms were developed from achira starch, chitosan and nanoclays using the solvent-casting method. To obtain filmogenic solutions, different sonication times (0, 10, 20 30 min) considered in order to evaluate incidence of this parameter on chemical physico-mechanical properties bionanocomposite films. The analysis FTIR spectroscopy showed strong intermolecular interactions between components with increasing times. results for tensile strength elongation satisfactory films min...

Excellent antioxidants<italic>via</italic>SPLET in aqueous solution, moderate antioxidants<italic>via</italic>HAT lipid medium.

The thermal, rheological, mechanical, and barrier properties of flat biopolymeric films processed by extrusion with different proportions plasticizer surfactant were evaluated. In the first stage, pellets developed through twin-screw using a temperature profile in ascending step process. These samples analyzed rotational rheology analysis to understand viscoelastic transitions behavior storage loss modulus, as well incidence complex viscosity concerning concentration. interaction among...

The modification of achira starch a thermoplastic biopolymer is shown. Glycerol and sorbitol, common plasticizers, were used in the molten state with organic acids such as oleic acid lactic obtaining thermodynamically more stable products. proportion starch:plasticizer was 70:30, agent added portions from 3%, 6%, 9% by weight. These mixtures obtained torque rheometer for 10 min at 130 °C. managed to efficiently promote gelatinization process increasing available polar sites towards surface...

In this work, we present a functionalization strategy of starch-poly(lactic acid) (PLA) blends with organic acids. Lactic and acetic acid were used as agents, oleic was also included in the previous acids, aim finding synergy that thermodynamically benefits products provides hydrophobicity. The ratio starch sorbitol 70:30, added agent replaced 6% plasticizer; meanwhile, thermoplastic (TPS)–PLA blend proportion 70:30 considering modified TPS. mixtures obtained torque rheometer at 50 rpm for...

The preparation of new materials based on starch for the development biodegradable packaging is increasing, however, poor properties this biopolymer application causes an area opportunities improvement water vapour permeability (WVP), mechanical properties, thermal hydrophilicity, absorption, among others. Hence, has been combined with other polymers such as polyvinyl alcohol, which shown in starch, also, use clays suggests that response to can be improved. Therefore, work, and...

Biodegradable packaging prepared from starch is an alternative to fossil-based plastic packaging. However, the properties of do not comply with necessary physicochemical preserve food. Hence, in a previous study, we reported preparation composite polymer material based on starch-chitosan-pluronic F127 that was found be adequate material. In this modified by storing it for 16 months under ambient conditions. The results indicate incorporation pluronic blend can help avoid retrogradation...

Starch is a biopolymer with wide potential for the generation of new biodegradable packages due to its high availability and low price. However, weak functional properties, it necessary limit interaction some hydroxyl, evaluate blends other polymers improve their performance. Glycerol plasticized acetylated corn starch films were developed by casting method, impact incorporating chitosan (TPS:CH) at various proportions (75:25, 50:50, 25:75 v/v) was studied. The effect ratios on films'...

In this work, we report the synthesis and characterization of a novel series porphyrins, some them bearing donor-acceptor groups. meso-substituted free-base porphyrins:5-(4-amino-phenyl)-10,15,20-triphenylporphyrin (TPPNH 2 ) 5-(4-acetamidophenyl)-10,15,20-triphenylporphyrin (TPPNHAc), as well their tribromo (Br 3 TPPNH Br TPPNHAc) trimethylsilyl-substituted homologs (TMS TMS TPPNHAc were synthesized characterized. The optical properties all compounds have been studied by absorption...

Debido a que la fuerza de los compuestos madera y plástico (CMP) se basa en interacción fibra-matriz, ha estudiado influencia del agente compatibilizante al modificar matriz plástica con diferentes proporciones polipropileno injertado anhídrido maléico (PP-g-MA). Por lo tanto, evaluaron las propiedades térmicas mecánicas una nueva serie CMP 20% fibra mediante técnica inyección. Cabe mencionar etapa previa proceso inyección, estos materiales fueron mezclados extrusora doble husillo...

Based on the results of research papers reflected in scientific literature, main examples, methods and perspectives for development technical textiles are considered. The focus this work is to concentrate obtained different textile applications (technical textiles) through use biodegradable polymers modified improved with nanoparticles. techniques obtaining polymeric nanocomposites, finishing processes, type structure specified. In general, key aspects identified a better understanding...