This article reports an amperometric glucose biosensor based on a new type of nanocomposite polypyrrole (PPY) with p-phenyl sulfonate-functionalized single-walled carbon nanotubes (SWCNTs-PhSO3-). An environmentally friendly functionalization procedure the SWCNTs in presence substituted aniline and oxidative species was adopted. The nanocomposite-modified electrode exhibited excellent electrocatalytic activities towards reduction or oxidation H2O2. feature allowed us to use it as bioplatform...

The purpose of this study was to extract the lipophilic fraction from one largest source waste in industrial sector, namely, tomato residue processing fruit. In order make process more environmentally sustainable, used a green extraction protocol employing natural deep eutectic solvents (NADESs) combined with less energy-consuming technology, ultrasound-assisted (UAE) method, simultaneously recover carotenoids and tocopherol dried powder waste. Two NADESs, hydrophilic hydrophobic, were...

Bacterial cellulose (BC) with increased hydrophobicity is required for several applications including packaging. Surface functionalization of BC may provide good resistance to moisture, barrier properties or improved compatibility polymer matrices. For this purpose, chemical grafting in mild, eco-friendly conditions was carried out using different agents. membranes were surface functionalized vinyl-triethoxy silane (VS) 3-aminopropyl triethoxysilane (APS), by acylation and acrylation. The...

We have investigated the influence exerted by concentration of graphene oxide (GO) dispersion as a modifier for screen printed carbon electrodes (SPCEs) on fabrication an electrochemical biosensor to detect DNA hybridization. A new pretreatment protocol SPCEs, involving two successive steps in order achieve reproducible deposition GO, is also proposed. Aqueous GO dispersions different concentrations (0.05, 0.1, 0.15, and 0.2 mg/mL) were first drop-cast SPCE substrates then electrochemically...

In the actual context of growing concerns over sustainability and energy efficiency, Phase Change Materials (PCMs) have gained attention as promising solutions for enhancing storage release efficiency. On another hand, materials based on graphene oxide (GO) proven antibacterial activity, biocompatibility, efficiency in microbial growth inhibition, pollutant removal. Integrating nanoparticles into PCMs creating Nano-Enhanced (NEPCMs) opened new horizons optimizing performance these systems...

ABSTRACT Polyurea nanocomposites represent a promising option in the development of advanced materials for applications that require high mechanical resistance. This article describes an optimized synthetic route obtaining polyurea with enhanced properties by employing epoxy‐functionalized multiwalled carbon nanotubes (MWCNTs) as reinforcing agent. The experimental measurements revealed these functionalized nanofillers have positive effect on composite only until they reach certain...

This paper reports the synthesis and complex characterization of novel polymeric networks based on crosslinking Bombyx mori silk fibroin via poly(N-isopropylacrylamide) bridges generated by an ammonium cerium nitrate redox system. The research study gives understanding polymerization mechanism in terms generation radical sites, growth termination reaction, as well involvement modifications structure properties. physico-chemical was carried out FTIR-ATR, X-ray photoelectron spectroscopy RAMAN...

This paper reports the synthesis and complex characterization of nanocomposite hydrogels based on polyacrylamide functionalized magnetite nanoparticles. Magnetic nanoparticles were with double bonds by 3-trimethoxysilyl propyl methacrylate. Nanocomposite prepared radical polymerization acrylamide monomer bond modified XPS spectra for recorded to evaluate covalent bonding silane modifying agent. Swelling measurements in saline solution performed behavior these having various compositions....

The inherent brittleness of poly(3-hydroxybutyrate) (PHB) prevents its use as a substitute petroleum-based polymers. Low molecular weight plasticizers, such tributyl 2-acetyl citrate (TAC), cannot properly solve this issue. Herein, PHB films were obtained using biosynthesized poly(3-hydroxyoctanoate) (PHO) and commercially available TAC toughening agents. strongly decreased the thermal stability up to 200 °C due loss low boiling point plasticizer, while minor was noticed at temperature for...

Currently available DNA detection techniques frequently require compromises between simplicity, speed, accuracy, and cost. Here, we propose a simple, label-free, cost-effective platform developed at screen-printed carbon electrodes (SPCEs) modified with reduced graphene oxide (RGO) gold nanoparticles (AuNPs). The preparation of the involved two-step electrochemical procedure based on GO reduction onto SPCEs followed by HAuCl4 to facilitate post-grafting reaction AuNPs. final sensor was...

We report for the first time a simple method synthesis of porous gelatin-alginate-polyacrylamide scaffolds with interpenetrating networks structure. The materials are obtained through step-by-step procedure, starting polymerization acrylamide and followed by cross-linking natural components. Porosity was induced freeze-drying. composition resulting matrices is responsible elastic properties, high water affinity, mechanical behavior appropriate drug delivery soft tissue engineering use. All...

Microcrystalline cellulose (MCC) was surface modified by two approaches, namely a plasma treatment in liquid using Y-shaped tube for oxygen flow (MCC-P) and TEMPO mediated oxidation (MCC-T). Both treatments led to the functionalization of as illustrated FTIR XPS results. However, had much stronger oxidizing effect, leading decrease thermal stability MCC 80 °C. Plasma celluloses were incorporated poly(3-hydroxybutyrate) (PHB) matrix they influenced morphology, thermal, mechanical properties...

Epoxy nanocomposites derived from linseed oil, reinforced with graphene oxide (GO) and montmorillonite (MMT) nanostructures, were synthesized. The nanohybrids developed by enriching the structure of MMT GO primary amines through a common simplified method, which implies physical interactions promoted ultrasonic processing energy. influence new nanoreinforcing agents along neat ones on overall properties biobased epoxy materials for coating applications was assessed. Interface formation...

This article compares two exfoliation options of multilayered silicate, one considering the action shear stress and temperature during melt compounding another taking into account thermo-mechanical pretreatment silicate in a plasticizer common to starch polyvinyl alcohol (PVOH), polymers from compound. Increasing time proved be an ineffective method for following high degradability PVOH under conditions loss hydration conditions. The obtained results prove that, by pretreating before...

Poly (3-hydroxybutyrate) (PHB) is a valuable biopolymer that produced in industrial quantity but not widely used applications due to some drawbacks. The addition of cellulose nanofibers (CNF) as biofiller PHB/CNF nanocomposites may improve PHB properties and enlarge its application field. In this work, n-octyltriethoxy silane (OTES), medium-chain-length alkyl silane, was surface chemically modify the CNF (CNF_OTES) enhance their hydrophobicity compatibility with PHB. functionalization...

Abstract The aim of the work was to synthesize epoxy-based nanocomposites reinforced with multi-walled carbon nanotubes (MWNT). MWNTs were first functionalized in order increase dispersion degree within polymer matrix and thus ensure good adhesion between two components. functionalization process consists steps: first, MWNT oxidized, then an amidation reaction occurred various amines using carbondiimide succinimide as activators. Thus, new modified benzylamine (BA) nonylphenoxy...

Sustainable nanocomposite materials based on different functionalized nanocellulose (NC) structures embedded in epoxidized linseed oil (ELO) were developed as foundation toward a greener approach for anticorrosive coating evolution. The work leans functionalization with (3-aminopropyl) triethoxysilane (APTS), (3-glycidyloxypropyl)trimethoxysilane (GPTS), and vanillin (V) of NC isolated from plum seed shells, evaluated potential reinforcing agents the increase thermomechanical properties...