Abstract This research work has concerned a study on thermomechanical and crystallization properties of poly(lactic acid) (PLA) composites containing three different types additives; namely: kenaf fiber (20 pph), Cloisite30B nanoclay (5 hexagonal boron nitrile (h‐BN; 5 pph). The were prepared using twin screw extruder before molding. Crystallization behaviors the various also examined differential scanning calorimetry. By adding additives, tensile modulus polymer increased, whereas their...

This research work undertook a comparative study of the promoting effects graphene in TiO 2 photoanodes. The aim this was to investigate types and concentration reduced oxides (rGO) on structure properties photovoltaic performance based electrodes. Graphene oxide (GO) prepared by using modified Hammer’s method. Next, GO two different approaches, which were chemical reduction with vitamin C thermal reduction. latter approach also carried out situ during fabrication heat treatment processes...

Abstract This study has concerned preparation of polylactic acid grafted with maleated thermoplastic starch (PLA‐ g ‐MTPS) and a on compatibilizing efficacy the above copolymers in PLA/thermoplastic (TPS) blends. The PLA‐ ‐MTPS were prepared by two‐step reaction. First, (MTPS) was reacting cassava glycerol maleic anhydride (MA). Second, MTPS onto PLA molecules using peroxide as an initiator. Chemical structures products characterized Fourier transform infrared spectroscopy 1 H‐NMR...

Abstract Proton exchange membranes for a direct methanol fuel cell were prepared by blending poly(vinylidene fluoride) [PVDF] with sulfonated poly(etheretherketone) [SPEEK]. The effects of PVDF content on permeability in the blend investigated using diffusion and gas chromatography technique. thermal resistance proton conductivity also determined gravimetric analysis (TGA) an impedance technique, respectively. It was found that decreased at expense conductivity. values are much lower than...

This work concerns a study on the effects of fiber types and content cellulose nanofiber mechanical, thermal, optical properties polyvinyl alcohol (PVA) composites. Two different nanofibers, which are nanofibrillated (NFC) bacterial (BC), were prepared under various mechanical treatment times then incorporated into PVA prior to fabrication composite films. It was found that tensile modulus film increased with nanofibers at expense its percentage elongation value. DSC thermograms indicate...

Abstract This study concerns the photodegradation and stabilization of a solar cell encapsulating material made from ethylene/vinyl acetate copolymer (EVA). EVA was compounded with various additives in twin‐screw extruder. After that, extruded film cured hydraulic compression mold before being exposed to ultraviolet (UV) radiation at an ambient temperature for 800 h. The thermal stability also studied through aging sample 90°C 2000 tensile strength unstabilized decreased only slightly after...

ABSTRACT This research work aims to investigate the effects of types and concentration cellulose nanocrystals (CNCs) prepared from bacterial (BC) nanofibrillated (NFC) on structure properties polyurethane (PU) composites. Feasibility applying polymer composite for encapsulation dye sensitized solar cells was interest. Both CNCs were pretreated via esterification before mixing with by a solution process. Tensile strength thermal stability PU/esterified found be superior those systems...

Abstract This research work has concerned a study on relationship between structure and properties of maleated thermoplastic starch (MTPS)/plasticized poly(lactic acid) (PLA) blend. The aim this is to investigate the effects blending time, temperature, blend ratio mechanical, rheological, thermal MTPS was prepared by mixing cassava with glycerol maleic anhydride (MA). Chemical modified characterized using FTIR technique, whereas degree substitution determined titration technique. After that,...

Abstract Nanocomposites based on blends of poly(butylene succinate) (PBS) and thermoplastic cassava starch (TPS) were prepared using a two‐roll mill compression molding, respectively. Two different types clay, namely sodium montmorillonite (CloisiteNa) the organo‐modified MMT (Cloisite30B) used. The morphological mechanical properties nanocomposite materials determined by XRD technique tensile test, Thermal composite also examined dynamic thermal analysis gravimetric techniques. Barrier...

Abstract Layered silicate nanocomposite membranes to be used as electrolyte polymeric in a direct methanol fuel cell were prepared through the mixing of poly(vinyl alcohol) (PVA) with various amounts (2, 4, and 5% w/w) sodium montmorillonite layered nanoclay. The proton conductivity polymer was induced by reaction sulfosuccinic acid. After that, solution sulfonated PVA–layered cast into membranes. permeability determined four‐point probe technique gas chromatography technique, respectively....

Abstract Sulfonated poly(vinyl alcohol) (PVA) for use as a proton conductive membrane in direct methanol fuel cell (DMFC) was prepared by reacting the PVA with sulfoacetic acid and poly(acrylic acid). The effects of amount acid) on conductivity, permeability, water uptake, ion exchange capacity (IEC) sulfonated membranes were investigated using impedance analysis, gas chromatography, gravimetric titration techniques, respectively. uptake decreased used. conductivity IEC values initially...

Abstract A proton‐exchange membrane for a direct methanol fuel cell was prepared by modifying the chemical structure of poly(vinyl alcohol) (PVA) via sulfonation. The sulfonation carried out using sulfophthalic acid (sPTA) as sulfonating agent. sulfonated PVA membranes, with variety degrees substitutions, were obtained varying crosslinking time and amount agents. thermal stability characterized FTIR thermogravimetric analysis techniques, respectively. ion‐exchange capacity (IEC) water uptake...

A boron dipyrromethene (BODIPY) featuring triphenylamine triad, BD, has been synthesized as a co-sensitizer in dye-sensitized solar cells (DSCs). The optical and electrochemical properties of BD have characterized using UV-vis spectroscopy cyclic voltammetry. DSCs containing co-sensitizers, N719 prepared two procedures co-deposition stepwise deposition. influences the staining processes, deposition on dye loading, dispersion TiO2 photoanode DSC performance investigated FTIR, SEM-EDS, I-V...

Thermochromic films based on vanadium dioxide (VO₂)/ethylene vinyl acetate copolymer (EVA) composite were developed. The monoclinic VO₂ particles was firstly prepared via hydrothermal and calcination processes. effects of time tungsten doping agent crystal structure morphology the calcined metal oxides reported. After that, 1 wt % powder mixed with EVA compound, using two different mixing It found that mechanical properties EVA/VO₂ by melt process superior to those which solution process. On...