Synthesis and characterization of amorphous mesoporous silica from palm kernel shell ash

Imoisili, Patrick Ehi; Ukoba, Kingsley; Jen, Tien‐Chien

doi:10.1016/j.bsecv.2019.09.006

Cited by 63 publications

(34 citation statements)

References 31 publications

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“…Band 1050-1170 cm -1 was owed to the asymmetric stretching vibration network of Si-O-Si. The peak appeared at 1273 cm −1 which corresponds to B-O stretching whereas a small peak at 750-606 cm −1 indicated Si-O-Al was assigned to symmetric stretching vibration network of the gel network [20]. 3.1.…”

Section: Resultsmentioning

confidence: 98%

Mechanical Properties of Composite Materials from Waste Poly(ethylene terephthalate) Reinforced with Glass Fibers and Waste Window Glass

Worku

Wubieneh

2021

International Journal of Polymer Science

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After primary uses of the plastic product, most developing countries like Ethiopia are facing a shortage of postconsumer disposal waste sites and it became a very serious problem on environmental pollution due to its nonbiodegradable nature. For this reason, regenerating and using the waste product as resources and reducing environmental pollutions are a great opportunity. This research is aimed at the manufacturing of composite materials from waste poly(ethylene terephthalate) (PET) bottles reinforced with glass fibers and filled with waste glass powder for floor tile applications. The tile composites were prepared by the melt-mixing method followed by compression molding. The effect of filler, fiber, and PET matrix loading on the composite was investigated using their tensile, compression, and flexural strength tests. The sample was characterized using a universal testing machine. PerkinElmer FTIR instrument was also used. For this, eleven samples prepared by varying the glass fiber weight % from 0 to 10, PET matrix weight % from 70 to 85, and glass powder filler weight % from 5 to 20. The measurement results of the composite were maximum tensile strength (81.625 MPa) and flexural strength (1067.59 MPa) recorded at 10%weight of glass fiber, 85% weight of PET matrix, and 5%weight of window glass filler. The maximum compressive strength is 1876.14 MPa at 10% weight glass fiber, 70 wt% PET matrix, and 20 wt% window glass filler. Based on this, the tensile strength and flexural strength increased with increased weight % of glass fiber and decreased with increased window glass filler. The FTIR spectrum shows some of the groups that have been removed from the recycled PET; this explains the brittleness of the recycled PET as compared to the waste bottle PET. The microstructure was uniformly distributed, and the material became opaque, probably because the decrease in chain length improves chain packing, increasing the crystallinity degree and crystal size.

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Section: Resultsmentioning

confidence: 98%

Mechanical Properties of Composite Materials from Waste Poly(ethylene terephthalate) Reinforced with Glass Fibers and Waste Window Glass

Worku

Wubieneh

2021

International Journal of Polymer Science

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“…TG analysis of the mesoporous MCM-41 ( Figure 7) revealed two intervals of weight loss, the first one being caused by the loss of the water from the silica surface, the second one being assigned to the mesoporous structure disruption [21,28]. The total mass loss for the MCM-41 was about 5.25%.…”

Section: Mesoporous Mcm-41 Characterizationmentioning

confidence: 99%

Coal Fly Ash Derived Silica Nanomaterial for MMMs—Application in CO2/CH4 Separation

et al. 2021

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In order to obtained high selective membrane for industrial applications (such as natural gas purification), mixed matrix membranes (MMMs) were developed based on polysulfone as matrix and MCM-41-type silica material (obtained from coal fly ash) as filler. As a consequence, various quantities of filler were used to determine the membranes efficiency on CO2/CH4 separation. The coal fly ash derived silica nanomaterial and the membranes were characterized in terms of thermal stability, homogeneity, and pore size distribution. There were observed similar properties of the obtained nanomaterial with a typical MCM-41 (obtained from commercial silicates), such as high surface area and pore size distribution. The permeability tests highlighted that the synthesized membranes can be applicable for CO2 removal from CH4, due to unnoticeable differences between real and ideal selectivity. Additionally, the membranes showed high resistance to CO2 plasticization, due to permeability decrease even at high feed pressure, up to 16 bar.

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“…In the pattern of PVA/TEOS/APTES, the diffraction peak of silica is observed at 2θ = 24 . [23] In the pattern of PVA/TEOS/ APTES/CuFe 2 O 4 , characteristic XRD peaks of CuFe 2 O 4 NPs appeared at around 34 , 37 , 58 , and 62 which correspond respectively to the (200), (202), (312), and (224) planes of tetragonal CuFe 2 O 4 (ICDD No. 00-034-0425), confirm the immobilization of the NPs in the mesoporous PVA/TEOS/APTES structure.…”

Section: Characterization Of the Synthesized Mesoporous Materialsmentioning

confidence: 99%

Inclusion of sulfamethoxazole in a novel CuFe₂O₄ nanoparticles/mesoporous silica‐based nanocomposite: Release kinetics and antibacterial activity

Mehrabi

Shamspur

Mostafavi

et al. 2020

Applied Organom Chemis

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In this work, we aimed to improve the antibacterial activity of sulfamethoxazole (SMX) via its inclusion in a newly synthesized nanocomposite composed of CuFe 2 O 4 nanoparticles and poly(vinyl alcohol)/silica-based mesoporous materials. Characterization of this formulation using different techniques confirmed the correct synthesis and showed that this mesoporous nanocomposite had an amorphous structure with relatively high surface area of 1,620.7 m 2 g −1 and mean pore diameter of 1.6576 nm. Zeta potential of the formulation was obtained to be zero which led to its higher bioavailability in comparison to pure SMX with negative zeta potential. Antibacterial property of the prepared formulation against Staphylococcus aureus and Escherichia coli was evaluated. Minimum inhibitory concentration of the SMX-loaded mesoporous nanocomposite was considerably lower than those of pure SMX, indicating the efficient function of the mesoporous material as a delivery system. Kinetics of SMX release was also studied using zero-order, first-order, Higuchi, and Korsmeyer-Peppas kinetics models. According to the obtained results, the release kinetics was found to obey zero-order model. So the possibility of sustained release of SMX from the synthesized carrier may be suggested.

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Synthesis and characterization of amorphous mesoporous silica from palm kernel shell ash

Cited by 63 publications

References 31 publications

Mechanical Properties of Composite Materials from Waste Poly(ethylene terephthalate) Reinforced with Glass Fibers and Waste Window Glass

Mechanical Properties of Composite Materials from Waste Poly(ethylene terephthalate) Reinforced with Glass Fibers and Waste Window Glass

Coal Fly Ash Derived Silica Nanomaterial for MMMs—Application in CO2/CH4 Separation

Inclusion of sulfamethoxazole in a novel CuFe₂O₄ nanoparticles/mesoporous silica‐based nanocomposite: Release kinetics and antibacterial activity

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Synthesis and characterization of amorphous mesoporous silica from palm kernel shell ash

Cited by 63 publications

References 31 publications

Mechanical Properties of Composite Materials from Waste Poly(ethylene terephthalate) Reinforced with Glass Fibers and Waste Window Glass

Mechanical Properties of Composite Materials from Waste Poly(ethylene terephthalate) Reinforced with Glass Fibers and Waste Window Glass

Coal Fly Ash Derived Silica Nanomaterial for MMMs—Application in CO2/CH4 Separation

Inclusion of sulfamethoxazole in a novel CuFe2O4 nanoparticles/mesoporous silica‐based nanocomposite: Release kinetics and antibacterial activity

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Inclusion of sulfamethoxazole in a novel CuFe₂O₄ nanoparticles/mesoporous silica‐based nanocomposite: Release kinetics and antibacterial activity