Publications by authors named "Saeed M Al-Zahrani"

Article Synopsis
  • * The fabrication of standard samples for testing was done using aluminum molds, and techniques like sonication and silane coupling were used to ensure uniform dispersion of the components in the epoxy matrix.
  • * Results showed dramatic improvements in the tensile and yield strength of the composite, highlighting the benefits of combining Zr and SiO with microfillers, making the material suitable for construction applications where strength and adhesion are key.
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This paper investigates making an injection mouldable conductive plastic formulation that aims for conductivity into the electromagnetic interference (EMI) shielding range, with good mechanical properties (i.e., stiffness, strength, and impact resistance).

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This study investigated the replacement of butter with soy wax (SW)/rice bran oil (RBO) oleogel in varied proportions in cookie dough and the resulting cookies. The study mainly evaluates the physical, textural, and chemical properties of the butter cookie dough and cookies by replacing butter with SW/RBO oleogel. The dough was assessed using moisture analysis, microscopy, FTIR Spectroscopy (Fourier Transform Infrared) and impedance spectroscopies, and texture analysis.

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In previous works, we had found that the addition of micron-sized, irregular-shaped aluminum (Al) powder, or Al nano platelets (flakes), improved the mechanical properties of polyesters, and that, additionally, the flakes led to an increase in electrical conductivity. The aim of this work was to examine the effect of nano-spherical particles of aluminum in a 60/40 PBT/PET polyester blend. A blend was used because it can help with the formation of a segregated network of metal particles that allows electrical conductivity at low loading.

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This research paper presents the fabrication of epoxy coatings along with the hybrid combination of SiO and ZrO. The epoxy resin is incorporated with SiO as the primary pigment and ZrO as the synergist pigment. The study delves into the adhesion, barrier, and anti-corrosion properties of these coatings, enriched with silica and zirconium nanoparticles, and investigates their impact on the final properties of the epoxy coating.

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  • Researchers synthesized different methanesulfonate-based protic ionic liquids (PILs) and characterized their structure using various techniques like FTIR and NMR spectroscopy.
  • The thermal stability and behavior of these PILs were analyzed using methods such as DSC and TGA, while EIS was employed to measure their ionic conductivity.
  • A specific PIL, compatible with polybenzimidazole, was used to create proton-conducting polymer electrolyte membranes (PEMs), which demonstrated good thermal stability and conductivity, making them suitable for high-temperature fuel cell applications.
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  • * Various techniques, including EDS, FE-SEM, FTIR, and TGA, were used to analyze the physical and chemical properties of the coatings.
  • * Coatings with ZrO nanoparticles demonstrated improved corrosion resistance and adhesion compared to pure epoxy, with the 2% ZrO formulation showing the best performance due to better particle dispersion in the epoxy matrix.
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This work presents the development of a cost-effective electric-stimulus-responsive bending actuator based on a sulfonated polyvinyl chloride (SPVC)-phosphotungstic acid (PTA) ionic polymer-metal composite (IPMC), using a simple solution-casting method followed by chemical reduction of platinum (Pt) ions as an electrode. The characterizations of the prepared IPMC were performed using Fourier-transform infrared (FTIR) spectroscopy, Scanning electron microscopy (SEM), X-ray diffraction (XRD) techniques, Thermogravimetric analysis (TGA), and Energy-dispersive X-ray (EDX) analysis. Excellent ion-exchange capacity (IEC) and proton conductivity (PC), with values of ca.

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  • Bigels are stable biphasic systems used in food and pharmaceuticals, combining hydrogel and oleogel for better delivery.
  • The study focused on optimizing a guar gum hydrogel and sesame oil/candelilla wax oleogel bigel using cellulose nanocrystals from date palm to enhance properties.
  • Results indicated that the dp-CNC improved firmness and fluidity of the bigels, with the best drug release observed in one specific formulation (BG3) showcasing quasi-Fickian diffusion.
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  • There is a growing interest in long afterglow composites for applications in nighttime signals, sensors, and biomedical fields, prompting a study on Polypropylene (PP) composites with strontium aluminate fillers.
  • The composites exhibited distinct auto-glowing properties, emitting green and blue light after UV excitation, with phosphorescence intensity and decay linked to the amount of filler used.
  • Analysis showed that the fillers affected the crystallinity and thermal stability of the composites, but also reduced their tensile strength and modulus, particularly when larger filler sizes were incorporated.
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  • The study focused on optimizing two types of hardeners, polyaminoamine adduct (Aradur 450 BD) and polyamidoamine adduct (Aradur 3282 BD), for use with DGEBA epoxy resin to create coatings for mild steel panels.
  • Six coating samples (E-0, E-1, E-2 from Aradur 450 and F-0, F-1, F-2 from Aradur 3282) were produced and characterized using various analysis techniques, including FE-SEM and FTIR.
  • Results showed that the coatings had similar thermal and mechanical properties, but E-1 and F-1 coatings exhibited superior corrosion resistance, especially under exposure to 3.
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The current study delineates the use of date-palm-derived cellulose nanocrystals (dp-CNCs) as reinforcing agents. dp-CNCs were incorporated in varying amounts to poly(vinyl alcohol)/guar-gum-based phase-separated composite films. The films were prepared by using the solution casting method, which employed glutaraldehyde as the crosslinking agent.

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Conductive plastics are made by placing conductive fillers in polymer matrices. It is known that a conductive filler in a binary polymer blend with a co-continuous morphology is more effective than in a single polymer, because it aids the formation of a 'segregated conductive network'. We embedded a relatively low-cost conductive filler, aluminium nano platelets, in a 60/40 PBT/PET polymer blend.

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An electro-stimulus-responsive bending actuator was developed by synthesizing a non-perfluorinated membrane based on silicotungstic acid (SA), sulfonated polyvinyl alcohol (SPVA), and polyaniline (PANI). The membrane was developed via solution casting method. The dry membrane SA/SPVA showed a sufficient ion-exchange potential of 1.

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Herein, we present new approaches for developing sulfonated polyether ether ketone (SPEEK) and polyaniline-based (PANI) actuator formed by film-casting and chemical reduction of Pt electrodes. We have thoroughly studied the synthesis of SPEEK and characterized it by different analytical techniques. The ion-exchange capacity (IEC) and proton conductivity of SPEEK-PANI polymer membrane were calculated to be 1.

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  • The study focuses on creating cellulose triacetate from waste lignocellulosic parts of date palm, aiming to provide an eco-friendly alternative to petrochemical products.
  • A heterogeneous acetylation reaction was used, achieving a degree of substitution of 2.9, resulting in a cellulose ester with 43.9% acetyl and a molecular weight of 205,102 g·mol.
  • The synthesized cellulose triacetate has a thermal decomposition temperature of 380 °C, indicating its potential for use in biodegradable biocomposite materials.
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  • Researchers developed auto-glowing composites using HDPE combined with strontium aluminate and studied their phosphorescence, observing green and blue emissions when excited with UV light.
  • The crystallinity of the composites decreased with the addition of bulky AG fillers, but their melting and crystallization temperatures remained stable, indicating no chemical changes during processing.
  • Improvements in tensile strength, viscosity, and filler dispersion were noted in the composites, although prolonged exposure to harsh conditions led to a decrease in phosphorescent intensity and increased brittleness.
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Previously, we reported that amorphous poly(ethylene terephthalate) (PET) filled with irregular nodular aluminium (Al) particles gave simultaneous increases in tensile modulus, tensile strength, and impact resistance, which is unusual for materials. Here, we investigated the effect of the particle shape and size by using nano-platelet Al. The Al nano-platelets had a thickness higher than graphenes and clays, but lower than mica and talc, and due to their large widths, they had high aspect ratios.

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Highly pure cellulosic polymers obtained from waste lignocellulose offer great potential for designing novel materials in the concept of biorefinery. In this work, alpha-cellulose and nanocrystalline cellulose were isolated from the date palm trunk mesh (DPTM) through a series of physicochemical treatments. Supercritical carbon dioxide treatment was used to remove soluble extractives, and concentrated alkali pretreatment was used to eliminate the lignin portion selectively to obtain alpha-cellulose in approximately 94% yield.

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Synergistic formulations were developed with nano-pigments, and their effects on the mechanical properties on steel substrates and structures were evaluated. This paper provides a complete analysis of the epoxy coating, focusing on the incorporation of nano-pigments and their synergistic effects in obtaining higher mechanical properties. This study reports the preparation of epoxy nano-silica composites, their characterization, and the development of coatings based on nano-silica and ZnO particles.

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A tremendous potential has been observed in the designing of long afterglow materials for sensing, bioimaging, and encryption applications. In this study, two different strontium aluminate-based luminescent materials; SrAlO: Eu, Dy (S), and SrAlO: Eu, Dy (S) were melt-mixed with polypropylene (PP) matrix, and the phosphorescence properties were evaluated. After excitation at 320 nm, the PP/S composite exhibited a green emission and the PP/S generated a blue emission at 520 nm and 495 nm, respectively.

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The wastage of food products is a major challenge for the food industry. In this regard, the use of edible films and coatings have gained much attention due to their ability to prevent the spoilage of the food products during handling, transport, and storage. This has effectively helped in extending the shelf-life of the food products.

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Metal-plastic composites have the potential to combine enhanced electrical and thermal conductivity with a lower density than a pure metal. The drawback has often been brittleness and low impact resistance caused by weak adhesion between the metal filler and the plastic. Based on our observation that aluminum foil sticks very strongly to poly(ethylene terephthalate) (PET) if it is used as a backing during compression moulding, this work set out to explore PET filled with a micro and a nano aluminum (Al) powder.

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