In this work, the influence of surface functionalization due to synthesis conditions graphene oxide quantum dots GOQDs was evaluated for dopamine (DA) detection. were synthesized using HNO3 (6 M or 8 M) through a liquid-phase oxidation method. The characterization (HRTEM, FTIR, Raman, and XRD) evaluation by amperometry (AMP) differential pulse voltammetry (DPV) showed that GOQDs-8 with higher oxygen content more sensitive selective in DA detection than GOQDs-6. synergistic effects...

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....

The tailoring of novel nanomaterials for sensitive glucose detection through a non-enzymatic mechanism is currently under intensive research. Here, we present laser-induced graphene (LIG) electrode decorated with silver nanoparticles (AgNPs) as catalytic element the direct electrooxidation glucose. AgNPs were synthesized cyclic voltammetry using LIG template, resulting in porous tridimensional assembly anchored nanostructures. characterization corroborated formation LIG/AgNPs composite...

Lignin conveys several important and useful characteristics to starch films depending on the lignin MW, extraction procedure, botanical source. In this study, was obtained from durum wheat straw through organosolv process, followed by fractionation according solubility in alcohol. The alcohol‐soluble (ASL) then used prepare starch–ASL films. mechanical properties, thermal stability, water solubility, color, antioxidant activity of resulting were evaluated, also analyzed means SEM attenuated...

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...

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,...

Renewable polymers possess the potential to replace monomers from petrochemical sources. The design and development of polymeric materials sustainable are a technological challenge. main objectives this study were microstructure copolymers based on itaconic acid (IA), di-n-butyl itaconate (DBI), lauryl methacrylate (LMA); explore evaluate these as pressure-sensitive adhesives (PSA). copolymer synthesis was carried out through batch emulsion radical polymerization, an environmentally friendly...

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,...

Graphite oxide is synthesized via oxidation reaction using oxidant compounds that have lattice defects by the incorporation of unlike functional groups. Herein, we report synthesis graphite with diverse surface oxygen content through three (B, C, D) different modified versions Hummers method assisted microwave radiation compared conventional sample obtained (A). These methods allow not only production but also reduced graphene oxide, without undergoing chemical, thermal, or mechanical...

Herein, we report the melt blending of amorphous poly(lactide acid) (PLA) with poly(styrene-co-methyl methacrylate) (poly(S-co-MMA)). The PLAx/poly(S-co-MMA)y blends were made using PLA compositions from 50, 75, and 90wt.%, namely PLA50/poly(S-co-MMA)50, PLA75/poly(S-co-MMA)25, PLA90/poly(S-co-MMA)10, respectively. blend pellets extruded into filaments through a prototype extruder at 195 °C. 3D printing was done via fused deposition modeling (FDM) same temperature 40 mm/s feed rate....

It is well known that petroleum-derived plasticizers are causing continuous environmental and health issues. Recently, fatty acid methyl esters (FAMEs), also as biodiesels, have emerged sustainable alternatives to produce epoxides can be used greener plasticizers. In this regard, enzymatic catalysis has an ideal alternative for the epoxidation of biodiesels due observed high yields adducts purity. The present study employed Candida antarctica lipase a biocatalyst epoxidize FAME from grape...

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...