Publications by authors named "Anesh Manjaly Poulose"
The date palm tree is extensively cultivated in Middle Eastern countries such as Saudi Arabia, generating a large amount of waste in the form of leaves, seeds, and fibrous materials. This study examined the feasibility of using raw date palm fiber (RDPF) and NaOH chemically modified date palm fiber (NaOH-CMDPF) obtained from discarded agricultural waste for the removal of phenol in an aqueous environment. The adsorbent characterization was performed by using different techniques, i.
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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.
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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- 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.
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.
View Article and Find Full Text PDFA 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.
View Article and Find Full Text PDFThe application of biochar (BC) as a filler in polymers can be viewed as a sustainable approach that incorporates pyrolysed waste based value-added material and simultaneously mitigate bio-waste in a smart way. The overarching aim of this work was to investigate the electrical, mechanical, thermal and rheological properties of biocomposite developed by utilizing date palm waste-derived BC for the reinforcing of polypropylene (PP) matrix. Date palm waste derived BC prepared at (700 and 900°C) were blended at different proportions with polypropylene and the resultant composites (BC/PP) were characterized using an array of techniques (scanning electron microscope, energy-dispersive X-ray spectroscopy and Fourier transform infra-red spectroscopy).
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