Dielectric and material analysis on physicochemical activity of porous hydroxyapatite/cornstarch composites

You, Beh Chong; Cheng, E. M.; Nasir, N. F. Mohd; Eng, S.K.; Majid, M.S. Abdul; Ridzuan, M.J.M.; Khor, Shing Fhan; Khalid, N.

doi:10.1016/j.ijbiomac.2020.11.034

Cited by 12 publications

(8 citation statements)

References 53 publications

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“…Dielectric spectroscopy within this range yields valuable insights into the interactions between salts and other substances with electromagnetic fields across diverse frequencies, rendering it a versatile tool for both scientific and industrial applications. The dielectric attributes are delineated through the complex permittivity, expressed as ε* = ε’ – j ε” [ 34 , 35 ]. Within the super high frequency (SHF) spectrum, the influence of polarization (including interfacial and dipolar polarization) accounts for the real component of complex permittivity (ε′), while energy dissipation effects (comprising conductivity and polarization losses) manifest as the imaginary component (ε”) [ 34 , 36 ].…”

Section: Resultsmentioning

confidence: 99%

Mineral composition, crystallinity and dielectric evaluation of Bamboo Salt, Himalaya Salt, and Ba’kelalan salt content

Meng,

Sharifah Robiah Mohamad,

Mohd Nasir

et al. 2024

Heliyon

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Section: Resultsmentioning

confidence: 99%

Mineral composition, crystallinity and dielectric evaluation of Bamboo Salt, Himalaya Salt, and Ba’kelalan salt content

Meng,

Sharifah Robiah Mohamad,

Mohd Nasir

et al. 2024

Heliyon

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“…The sharp infrared peaks at 1089 cm -1 and 827cm -1 were corresponding to asymmetric and symmetric stretching frequencies of phosphate molecules respectively. Bending vibrations were observed in the range between 599 cm -1 and 557 cm -1 indicating the presence of a third phosphate molecule in the hydroxyapatite compound [33,34].…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Biologically Active Fish Bone Derived Hydroxyapatite and Montmorillonite Blended Sodium Alginate Composite for In-Vitro Drug Delivery Studies

Ahamed

Manimohan

Kalaivasan

2022

J Inorg Organomet Polym

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Fishbone comprising hydroxyapatite (bio-ceramic) is regularly viewed as a natural resource for biological and pharmaceutical applications. In this study, hydroxyapatite has been prepared from shbone waste using thermal calcination method. The composite hydroxyapatite-montmorillonite-sodium alginate was synthesized by co-precipitation method. Various functional groups of biocomposite were characterised using Fourier Transform infrared spectroscopy (FT-IR). Thermal gravimetric analysis (TGA) and X-ray diffraction studies were exhibited the thermal stability and crystallinity of biocomposite respectively. The morphological surface of composites was studied using scanning electron microscopy (SEM). The synthesized composite was designed to study the enhanced biological potential such as antibacterial, antioxidant, antidiabetic, drug loading and the drug releasing ability. Antioxidant and anti-diabetic analysis of composite were studied using Phosphomolybdenum and α-Amylase inhibitory method respectively. The drug releasing ability of compounds (Doxorubicin and Curcumin) were investigated by UV-spectrophotometry method at different pH medium (pH = 5.5, 6.8 and 7.4). Additionally, In-vitro kinetic studies were carried out on composite to determine the drug releasing ability of doxorubicin and curcumin.

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“…It induces the formation of the clusters that are due to the significant agglomeration effect. It is not conducive to the formation of porous structures [ 14 , 29 , 30 , 31 ]. It causes a decrement in average pore size (82.9 μm) and porosity (64.5%) of the H7S3 composite, as shown in Figure 2 .…”

Section: Resultsmentioning

confidence: 99%

“…The largest average pore size of the H3S7 composite with high porosity (as shown in Figure 2 ) facilitates the multiple reflections/scattering of the electromagnetic waves in the porous microstructures of the composite. It extends the propagation path of the electromagnetic waves that lead to enhancement of the interfacial polarization [ 28 , 31 , 34 , 46 ].…”

Section: Resultsmentioning

confidence: 99%

“…The higher starch proportion of the porous nHA/S composites induces higher intrinsic dipoles of starch and more accumulated space charges on the composite interfaces. It causes strong polarization and relative polarization relaxation processes (dissipation of energy) [ 7 , 31 , 45 , 53 ]. Meanwhile, the multiple scattering/reflections of the electromagnetic radiation occur frequently in the highly porous structure of the porous nHA/S composites.…”

Section: Resultsmentioning

confidence: 99%

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Regression Analysis of the Dielectric and Morphological Properties for Porous Nanohydroxyapatite/Starch Composites: A Correlative Study

You

Cheng

Nasir

et al. 2022

IJMS

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This paper aims to investigate the dielectric properties, i.e., dielectric constant (ε′), dielectric loss factor (ε″), dielectric tangent loss (tan δ), electrical conductivity (σ), and penetration depth (Dp), of the porous nanohydroxyapatite/starch composites in the function of starch proportion, pore size, and porosity over a broad band frequency range of 5 MHz–12 GHz. The porous nanohydroxyapatite/starch composites were fabricated using different starch proportions ranging from 30 to 90 wt%. The results reveal that the dielectric properties and the microstructural features of the porous nanohydroxyapatite/starch composites can be enhanced by the increment in the starch proportion. Nevertheless, the composite with 80 wt% of starch proportion exhibit low dielectric properties (ε′, ε″, tan δ, and σ) and a high penetration depth because of its highly interconnected porous microstructures. The dielectric properties of the porous nanohydroxyapatite/starch composites are highly dependent on starch proportion, average pore size, and porosity. The regression models are developed to express the dielectric properties of the porous nanohydroxyapatite/starch composites (R2 > 0.96) in the function of starch proportion, pore size, and porosity from 1 to 11 GHz. This dielectric study can facilitate the assessment of bone scaffold design in bone tissue engineering applications.

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Dielectric and material analysis on physicochemical activity of porous hydroxyapatite/cornstarch composites

Cited by 12 publications

References 53 publications

Mineral composition, crystallinity and dielectric evaluation of Bamboo Salt, Himalaya Salt, and Ba’kelalan salt content

Mineral composition, crystallinity and dielectric evaluation of Bamboo Salt, Himalaya Salt, and Ba’kelalan salt content

Fabrication of Biologically Active Fish Bone Derived Hydroxyapatite and Montmorillonite Blended Sodium Alginate Composite for In-Vitro Drug Delivery Studies

Regression Analysis of the Dielectric and Morphological Properties for Porous Nanohydroxyapatite/Starch Composites: A Correlative Study

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