Sol-Gel Synthesis of Soda Lime Silica-Based Bioceramics Using Waste as Renewable Sources

2021 ◽  
Author(s):  
Palakurthy Srin ◽  
P. Abdul Azeem ◽  
K. Venugopal Reddy
Keyword(s):  
Rice Husk ◽  
Low Cost ◽  
Sol Gel ◽  
Soda Lime ◽  
Sintered Sample ◽  
Biological Properties ◽  
Point Of View ◽  
Renewable Sources ◽  
Bioactive Ceramics

Abstract The purpose of the work is to prepare and assess soda lime silica-based (SiO2-CaO-Na2O) bioactive ceramics using waste as renewable sources. Thus we produced a SiO2-CaO-Na2O-based bioactive ceramic by sol-gel process using rice husk and eggshells as sources of silica and calcium oxide, respectively. The precursors such as calcinated eggshell powder, rice husk ash (RHA) and sodium hydroxide (NaOH) were processed by the sol-gel method, resultant in SiO2-CaO-Na2O-based bioactive ceramics. The gel derived sintered sample showed combeite high (Na6Ca3Si6O18) as a major crystalline phase. Subsequently, the sintered specimens were analyzed from the physical and structural point of view, and in terms of apatite mineralization rate in simulated environments and cytocompatibility in relative to human osteoblast-like cells. The studies showed that the produced crystalline SiO2-CaO-Na2O-based ceramics showed an average porosity of 45%. In vitro evaluation of the biological properties revealed that the prepared ceramics possesses the mineralization of carbonated hydroxyapatite (CHA) in a simulated environment with good cytocompatibility and controlled degradation rate. Therefore, the results obtained suggest that the prepared SiO2-CaO-Na2O-based bioactive ceramics using waste as renewable sources might be a low cost ceramics for applications in biomedical field.

Antibacterial Effects of Sol-Gel Derived Zinc-Containing Hydroxyapatite

2007 ◽  
Vol 361-363 ◽  
pp. 139-142 ◽  
Author(s):  
Xin Chang Shi ◽  
H.Z. Jiang ◽  
J. Xue ◽  
Yun Mao Liao ◽  
L.Y. Xiao ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Sol Gel ◽  
Brain Heart Infusion ◽  
Zinc Content ◽  
Atomic Emission ◽  
Biological Properties ◽  
Zinc Ions ◽  
Antibacterial Effects ◽  
Inductively Coupled

In order to modify the biological properties of pure hydroxyapatite (HAp), two kinds of zinc-containing HAp, which had zinc content of 5.10wt% and 2.54wt%, respectively, were synthesized via sol-gel technique. The obtained coatings were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). Then the antibacterial effects were evaluated through bacteriostatic test on Streptococcus mutans (S.mutans) in vitro and zinc ions releasing ability was investigated through detecting the zinc ions concentration by inductively coupled plasma-atomic emission spectroscopy (ICP-AES). The obtained coatings were observed to possess typical apatite peaks in XRD patterns and high homogeneous and porous surfaces in SEM morphology. The coating layer demonstrated good releasing ability in Brain Heart Infusion (BHI) liquid and obviously inhibitory effects to the growth and proliferation of S. mutans. Based on the results obtained above, it is concluded that the sol-gel derived zinc-containing hydroxyapatite could be applied as an antibacterial effective biomaterial.

Facile Synthesis of Cu2SnSe3 Thin Film via Sol-Gel Process

2014 ◽  
Vol 1004-1005 ◽  
pp. 774-777 ◽  
Author(s):  
Ji Wan Liu ◽  
Gui Lin Chen ◽  
Wei Feng Liu ◽  
Guo Shun Jiang ◽  
Chang Fei Zhu
Keyword(s):  
Low Cost ◽  
Sol Gel ◽  
Soda Lime ◽  
Soda Lime Glass ◽  
X Ray Diffraction ◽  
X Ray ◽  
Absorbance Spectroscopy ◽  
Sol Gel Process ◽  
Ar Gas ◽  
Pure Cu

A low-cost non-vacuum process for fabrication of Cu2SnSe3 film by sol-gel method and knife-coating process is described. First, a certain amount of Copper (I) chloride and tin (IV) tetrachloride was dissolve into the mixture of water and alcohol and then some Polyvinyl Pyrrolidone (PVP) was added to the solution to obtain based colloidal solution. Next, precursor thin layer was deposited by knife-blading technique on soda-lime glass (SLG). Finally, precursor layer was annealed at selenium flow atmosphere carried by Ar gas at 550oC. Through X-ray diffraction (XRD) and Raman spectra, it is found that pure Cu2SnSe3 film was prepared successfully. Scanning electron microscopy (SEM) and UV–vis–NIR absorbance spectroscopy were used to characterize its morphology and optical bandgap.

Dielectric and I-V Characteristic of Lead Titanate Thin Films Prepared on ITO Glass Substrate

2015 ◽  
Vol 1109 ◽  
pp. 461-465 ◽  
Author(s):  
Nurbaya Zainal ◽  
Mohd Hafiz Wahid ◽  
Mohammad Rusop
Keyword(s):  
Thin Films ◽  
Lead Titanate ◽  
High Performance ◽  
Annealing Temperature ◽  
Low Cost ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Soda Lime ◽  
Soda Lime Glass ◽  
Ito Glass

Performance of lead titanate, (PbTiO3) thin films have been successfully investigated on microstructural properties, I-V characteristic, dielectric properties, and ferroelectric properties. PbTiO3offers variety of application as transducer, ferroelectric random access memory, transistor, high performance capacitor, sensor, and many more due to its ferroelectric behavior. Preparation of the films are often discussed in order to improve the structural properties, like existence of grain boundaries, particle uniformity, presents of microcrack films, porosities, and many more. Yet, researchers still prepare PbTiO3thin films at high crystallization temperature, certainly above than 600 ̊C to obtain single crystal perovskite structure that would be the reason to gain high spontaneous polarization behavior. Although this will results to high dielectric constant value, the chances that leads to high leakage current is a major failure in device performance. Thus, preparation the thin films at low annealing temperature quite an essential study which is more preferable deposited on low-cost soda lime glass. The study focuses on low annealing temperature of PbTiO3thin films through sol-gel spin coating method and undergo for dielectric and I-V measurements.

scholarly journals Cuttlefish Bone-Derived Biphasic Calcium Phosphate Scaffolds Coated with Sol-Gel Derived Bioactive Glass

Materials ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 2711
Author(s):  
Ana S. Neto ◽  
Daniela Brazete ◽  
José M.F. Ferreira
Keyword(s):  
Tissue Engineering ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Calcium Phosphates ◽  
Sol Gel ◽  
Biological Properties ◽  
X Ray Diffraction ◽  
Bioactive Glasses ◽  
Hydrothermal Transformation

The combination of calcium phosphates with bioactive glasses (BG) has received an increased interest in the field of bone tissue engineering. In the present work, biphasic calcium phosphates (BCP) obtained by hydrothermal transformation of cuttlefish bone (CB) were coated with a Sr-, Mg- and Zn-doped sol-gel derived BG. The scaffolds were characterized by X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy. The initial CB structure was maintained after hydrothermal transformation (HT) and the scaffold functionalization did not jeopardize the internal structure. The results of the in-vitro bioactivity after immersing the BG coated scaffolds in simulated body fluid (SBF) for 15 days showed the formation of apatite on the surface of the scaffolds. Overall, the functionalized CB derived BCP scaffolds revealed promising properties, but further assessment of the in-vitro biological properties is needed before being considered for their use in bone tissue engineering applications.

Physical Properties and Biological Performance of Bioactive Glasses and Glass-Ceramics Tested In Vitro

2011 ◽  
Vol 493-494 ◽  
pp. 85-89 ◽  
Author(s):  
Viorica Simon ◽  
R. Ciceo Lucacel ◽  
I. Titorencu ◽  
V. Jinga
Keyword(s):  
Cellular Response ◽  
Sol Gel ◽  
Glass Ceramics ◽  
Soda Lime ◽  
Osteosarcoma Cell ◽  
X Ray Diffraction ◽  
Bioactive Glasses ◽  
Human Osteosarcoma Cell ◽  
Biological Performance

Lime phosphosilicate and soda lime phosphosilicate glasses prepared by sol-gel method were precursors of bioactive glass-ceramics. The structure of the samples and the distribution of the [SiO4] units was investigated by X-ray diffraction and infrared spectroscopy. Human osteosarcoma cell line (MG63) was used for the in vitro cellular response. DNA staining (Hoechst 33258) assay was performed for assessing samples colonization.

Sol-Gel Synthesis and Characterization of SiO2-CaO-P2O5-SrO Bioactive Glass: In Vitro Study

2014 ◽  
Vol 631 ◽  
pp. 30-35 ◽  
Author(s):  
S. Solgi ◽  
M. Shahrezaee ◽  
A. Zamanian ◽  
T.S. Jafarzadeh Kashi ◽  
Majid Raz ◽  
...  
Keyword(s):  
Bioactive Glass ◽  
Mtt Assay ◽  
Sol Gel ◽  
Glass Network ◽  
Biological Properties ◽  
Osteosarcoma Cell ◽  
Three Samples ◽  
Human Osteosarcoma Cell ◽  
Sol Gel Synthesis

Bioactive glass of the type CaO–SrO–P2O5–SiO2was obtained by the sol-gel processing method. Three samples containing 0 mol%, 5 mol% and 10 mol% of SrO were synthesized. The obtained bioactive glasses were characterized by the techniques such as, X-ray diffraction (XRD) and scanning electron microscope (SEM) and the effect of SrO/CaO substitution on in vitro biological properties of the synthesized glasses were evaluated and biocompatibility of the samples was measured using MTT assay. The results showed that incorporation of Sr in the obtained glass network did not result in any structural alteration of it due to the similar role of SrO compared with that of CaO. In vitro experiments with human osteosarcoma cell lines (MG-63) and MTT assay indicated that bioactive glass incorporating 5 mol% of Sr in the composition is non-toxic and revealed good biocompatibility.

scholarly journals Novel Chitosan-Silica Hybrid Hydrogels for Cell Encapsulation and Drug Delivery

2021 ◽  
Vol 22 (22) ◽  
pp. 12267
Author(s):  
Soher N. Jayash ◽  
Paul R. Cooper ◽  
Richard M. Shelton ◽  
Sarah A. Kuehne ◽  
Gowsihan Poologasundarampillai
Keyword(s):  
Mechanical Properties ◽  
Sol Gel ◽  
Cell Encapsulation ◽  
Biological Properties ◽  
Aqueous Environment ◽  
Absorption Bands ◽  
Hybrid Hydrogels ◽  
Oscillatory Rheometry ◽  
3D Cell Cultures

Hydrogels constructed from naturally derived polymers provide an aqueous environment that encourages cell growth, however, mechanical properties are poor and degradation can be difficult to predict. Whilst, synthetic hydrogels exhibit some improved mechanical properties, these materials lack biochemical cues for cells growing and have limited biodegradation. To produce hydrogels that support 3D cell cultures to form tissue mimics, materials must exhibit appropriate biological and mechanical properties. In this study, novel organic-inorganic hybrid hydrogels based on chitosan and silica were prepared using the sol-gel technique. The chemical, physical and biological properties of the hydrogels were assessed. Statistical analysis was performed using One-Way ANOVAs and independent-sample t-tests. Fourier transform infrared spectroscopy showed characteristic absorption bands including amide II, Si-O and Si-O-Si confirming formation of hybrid networks. Oscillatory rheometry was used to characterise the sol to gel transition and viscoelastic behaviour of hydrogels. Furthermore, in vitro degradation revealed both chitosan and silica were released over 21 days. The hydrogels exhibited high loading efficiency as total protein loading was released in a week. There were significant differences between TC2G and C2G at all-time points (p < 0.05). The viability of osteoblasts seeded on, and encapsulated within, the hydrogels was >70% over 168 h culture and antimicrobial activity was demonstrated against Pseudomonas aeruginosa and Enterococcus faecalis. The hydrogels developed here offer alternatives for biopolymer hydrogels for biomedical use, including for application in drug/cell delivery and for bone tissue engineering.

scholarly journals Biosynthesis and characterization of gold nanoparticles using Brazilian red propolis and evaluation of its antimicrobial and anticancer activities

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
C. E. A. Botteon ◽  
L. B. Silva ◽  
G. V. Ccana-Ccapatinta ◽  
T. S. Silva ◽  
S. R. Ambrosio ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Antimicrobial Agents ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Volume Ratio ◽  
Antimicrobial Activities ◽  
Biological Properties ◽  
Anticancer Activities

AbstractGold nanoparticles (AuNPs) are highlighted due to their low toxicity, compatibility with the human body, high surface area to volume ratio, and surfaces that can be easily modified with ligands. Biosynthesis of AuNPs using plant extract is considered a simple, low-cost, and eco-friendly approach. Brazilian Red Propolis (BRP), a product of bees, exhibits anti-inflammatory, anti-tumor, antioxidant, and antimicrobial activities. Here, we described the biosynthesis of AuNPs using BRP extract (AuNPextract) and its fractions (AuNPhexane, AuNPdichloromethane, AuNPethyl acetate) and evaluated their structural properties and their potential against microorganisms and cancer cells. AuNPs showed a surface plasmon resonance (SPR) band at 535 nm. The sizes and morphologies were influenced by the BRP sample used in the reaction. FTIR and TGA revealed the involvement of bioactive compounds from BRP extract or its fractions in the synthesis and stabilization of AuNPs. AuNPdichloromethane and AuNPhexane exhibited antimicrobial activities against all strains tested, showing their efficacy as antimicrobial agents to treat infectious diseases. AuNPs showed dose-dependent cytotoxic activity both in T24 and PC-3 cells. AuNPdichloromethane and AuNPextract exhibited the highest in vitro cytotoxic effect. Also, the cytotoxicity of biogenic nanoparticles was induced by mechanisms associated with apoptosis. The results highlight a potential low-cost green method using Brazilian red propolis to synthesize AuNPs, which demonstrated significant biological properties.

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