In this study, poly(lactic acid) (PLA) blended with different natural waxes (beeswax, candelilla, carnauba, and cocoa) was investigated. Different wax amounts, 3, 5, 10, 15 wt%, were incorporated into the PLA using a Brabender internal mixer. The blends characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), rotational rheometer (RR), dynamic mechanical (DMA), contact angle to observe effect of on physicochemical, rheological, behavior, wetting properties....

Abstract Research on chalcogenide-based quantum dots (QDs) has advanced significantly over recent decades, largely due to their excellent optical properties, particularly photoluminescence, and relatively low toxicity. Among these, Cu2S CuS have demonstrated notable photothermal effects antibacterial activity, making them promising candidates for various biomedical applications, including cancer treatment. This study focuses the synthesis of functionalized with bovine serum albumin (BSA),...

The present research is a comprehensive study that developed poly(lactic acid) PLA/natural wax (Wx)/non-functionalized titanium dioxide nanoparticles (TiO2-NF) and PLA/Wx/titanium functionalized with triethoxysilane (TiO2-F) composites by melt blending. This systematically investigated their hydrolytic degradation, antibacterial properties, oxygen permeability, optical transparency. TiO2-NF or TiO2-F (0.1, 0.5, 1 wt%) were added to PLA/Wx (85:15) blend using Brabender internal mixer at 180...

This study aimed to obtain a second-generation snack by extrusion from the by-product of rice milling enriched with amaranth. The raw material used was amaranth flour (AF), starch (NS) and modified (MS), which were evaluated analysis substitution degree (SD), differential scanning calorimetry (DSC), viscosity (RVA), Fourier transform infrared spectroscopy (FT-IR) X-ray diffraction (XRD). snacks expanded microwave oven, as reference method. samples in hardness (D), expansion index (EI),...

In this study, polymer blends with a mechanical property balance based on poly(lactic acid) (PLA), stiff polymer, and elongated were developed. First, the binary PLA-elongated [ethyl vinyl acetate (EVA) or polyethylene], PLA-stiff [polystyrene poly(styrene-co-methyl methacrylate) (SMMA)] studied using dynamic mechanic analysis (DMA) analyzed Minitab statistical software to determine factors influencing elongation stiffness of blends. Then, ternary such as elongation-poly(lactic acid)-stiff,...

Abstract By impedance spectroscopy, Gonzalez‐Campos et al. J Polym Sci Part B: Phys 2009, 47, 932–943, reported the first evidence of a glass transition in polysaccharide. To gain better understanding on molecular relaxations polysaccharides, we study composites chitosan (CS)/silver nanoparticles (AgnP) films by dynamic mechanical analysis (DMA) and dielectric spectroscopy 2–250 °C temperature range. CS/AgnP conductivity increases two orders magnitude comparison with pristine CS. Three...

In this work the influence of multiwalled carbon nanotubes (MWCNT) on mechanical properties was evaluated also osteoinduction mechanism in Chitosan/MWCNT composite is reported. The morphology and scaffolds were controlled by varying solvent ratios, quenching temperatures concentration. vitro cell culture Sprague-Dawley rat's osteoblasts used to evaluate phenotype expression cells scaffolds. presence MWCNT a chitosan matrix improving its sustain osteoblast growth differentiation that...

This study is focused on investigating the rheological and mechanical properties of highly oxidized graphite (GrO) incorporated into a poly (lactic acid) (PLA) matrix composite. Furthermore, samples were annealed at 110 °C for 30 min to whether GrO concentration has an effect elastic modulus (E’) after treatment. The incorporation PLA was carried out by employing internal mixing chamber 190 °C. Six formulations prepared with concentrations 0, 0.1, 0.5, 1, 1.5, 3 wt%. thermal stability,...

The use of biomaterials as a replacement for thermoplastic polymers is an environmentally sound strategy. In this work, hydrogels cellulose isolated from wheat husk were modified by UV irradiation (353 nm) to improve mechanical performance. was dissolved with solvent system N,N-dimethylacetamide/lithium chloride (DMAc/LiCl). Infrared spectroscopy showed that the peak height at 1016 cm−1, associated C–O bonds glycosidic ring, increases time. It determined increase in signal related...

Abstract The molecular dynamics of poly(vinyl alcohol) (PVA) were studied by dielectric spectroscopy and dynamic mechanical analysis in the 20–300°C range. well‐established plasticizing effect water on glass‐transition temperature ( T g ) PVA was revisited. Improper elimination has led to a misinterpretation thermal relaxations such that depressed for wet films (ca. 40°C) been assigned as secondary β relaxation number previous studies literature. In samples, two different...

Abstract Activated carbon particles were obtained by a solvatation method and added as fillers in cellulose triacetate polymeric matrix. Various composite films prepared solvent casting at different controlled temperature relative humidity (35–55° C, 10–70% RH) conditions, for three filler loadings (0, 1 3%). Scanning electron microscopy (SEM) images revealed that slow evaporation rates (low high non‐agglomerated film is achieved. This condition observed SEM was correlated to the with best...

Abstract Carbon black (CB) and Graphite (GP) were embedded in poly(styrene–ethylene/butylene–styrene) (SEBS) to form CB/SEBS GP/SEBS composites. The electrical resistance was monitored situ during tensile, compressive dynamic mechanical tests, obtaining a correlation between the response strain. In test conductivity of composites showed almost same behavior than elastic modulus, decreasing at deformations higher 1%.

Environment-friendly polymer blends of poly(lactic acid) (PLA) and itaconic acid (IA), poly(itaconic (PIA), acid)-co-poly(methyl itaconate) (Cop-IA), net-poly(itaconic acid)-ν-triethylene glycol dimethacrylate (Net-IA) were performed via melt blending. The compositions studied 0.1, 1, 3, 10 wt% the diverse chemical architectures. research aims to study understand effect IA its different architectures on mechanical, rheological, thermal properties PLA. PLA/IA, PLA/PIA, PLA/Cop-IA, PLA/Net-IA...

This study aimed to obtain a third-generation snack from native rice starch (NS), modified by extrusion (MS), nopal flour (NF) and xanthan gum (XG). These raw materials were characterized proximal analysis, pH, particle size distribution, water absorption index (WAI) solubility (WSI), degree of substitution (DS), differential scanning calorimetry (DSC), rheology, Fourier transform infrared spectroscopy (FT-IR) electron microscopy (SEM). The analysis the response variables in nine...

This work focuses to improve the mechanical properties and investigates growth of osteoblasts on a degradable chitosan/poly(L-lactide)/carbon nanotubes composite for tissue engineering. The morphological characterizations were performed using scanning electronic microscopy (SEM) rheometrics analysis system (RSA). Osteoblasts differentiation was determined by alkaline phosphatase activity, total number cells an Alamar Blue assay, cell attachment proliferation visualized qualitatively SEM,...

Abstract The present research investigates the hydrolytic degradation of ternary blends composed poly(ethylene- co -vinylacetate) (EVA), poly(lactic acid) (PLA), and poly(styrene- -methyl methacrylate)(poly(S- -MMA) (SMMA) (EPS) at a temperature 37 °C pH 7.4, monitoring changes in phosphate buffer solution for 6 months. In addition, mechanical behavior morphology were evaluated from comparison with degraded against probes non-hydrolytically degraded. Likewise, hemolytic properties...

Due to its relatively simple structure, low-density polyethylene (LDPE) can be considered as a model polymer for the study of properties. Herein, effect processing variables on microstructure and crystallinity injection-molded LDPE specimens was quantitatively determined. The injected at different temperature conditions in barrel mold. were characterized by scanning electron microscopy X-ray diffraction. With data obtained, an analysis variance (ANOVA) carried out, response surface graphs...

Chitosan (Ch), Poly(DL-lactide-co-glycolide) (DL PLG) and Multiwalled Carbon Nanotubes (MWCNT) were used to fabricate biodegradable porous scaffolds for applications in tissue engineering by thermally induced phase separation (TIPS) technique. Through the use of a Field Emission Scanning Electron Microscopy, variation morphology was studied. The cumulative results obtained from IR X-ray diffraction spectra, TGA, DSC Mechanical properties suggest that there is chemical interaction between...

Natural starch (NS) was isolated from triticale flour (TF) and later modified by extrusion (MS) using acetic anhydride as a reactive agent. From each product (NS, TF, MS) proximal analysis performed well the characterization of its physicochemical properties (particle size determination (PSD), water absorption index (WAI) solubility (WSI), color L*, a*, b*, viscosity), degree substitution (DS), thermal (differential scanning calorimetry (DSC). Particle below sizes 250 μm were obtained in NS...