Synthesis of in-Situ Silica-Alginate Hybrid Hydrogels by a Sol-Gel Route

Hernández-González, Aurora C.; Téllez-Jurado, Lucía; Rodríguez‐Lorenzo, Luís M.

doi:10.1016/j.carbpol.2020.116877

Cited by 11 publications

(9 citation statements)

References 46 publications

(48 reference statements)

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“…In addition, a slight reduction in both peaks at 15 and 22° were observed for the other glass concentrations, whose diffractograms were not inserted, but which showed a similar aspect between them, indicating the contributions from alginate with semi-crystalline structure 69 and amorphous phase of bioactive glass, as found by Fiume et al 59 for glasses obtained by the sol-gel process. This result suggests that glass phase was well dispersed in the alginate matrix 43 .…”

Section: Crystallinity and Phase Characterization By X-ray Diffractionmentioning

confidence: 73%

“…In general, the beads are obtained incorporating a small amount of inorganic powders at micrometer scale into alginate suspension 6,42 . On the other hand a silica-alginate hybrid was obtained by the in-situ synthesis of silica networks via sol-gel process from (TEOS) and (APTES) precursors in an alginate matrix 43 . In our proposal was used a sol-gel route introducing a solution of both silicon and phosphorus hydrolyzed alcoxides into polymer suspension prior to the gelation process aiming to produce hybrids specially in the form of beads.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

“…Silica-alginate hybrid hydrogels prepared by a solgel were also performed by Hernández-González et al 43 . The authors observed that silica nuclei grown through the surface and inner face of the alginate matrix.…”

Section: Chemical Characterization Of Hydrogels By Ftir Spectroscopymentioning

confidence: 99%

See 2 more Smart Citations

Alginate/Bioactive Glass Beads: Synthesis, Morphological and Compositional Changes Caused by SBF Immersion Method

Costa

Dias

2021

Mat. Res.

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Composites of biodegradable polymers/bioactive glasses (BG) are of particular interest in bone repair, where ceramic phase can improve osteogenic features. This work reports the development of organic-inorganic beads based on alginate prepared by incorporating at polymer suspension different contents (25, 50 and 75 wt% with respect to alginate) of BG present at precursor solution, whose system (SiO 2 -CaO-P 2 O 5 ) was obtained by hydrolysis of both tetraethoxysilane (TEOS) and triethylphosphate (TEP) alkoxides, molar ratio TEOS:TEP of 1:0.1317, and which calcium source came from the same cold CaCl 2 solution used to gelling the hybrids. Beads were synthesized by extruding mixtures, drop by drop, in CaCl 2 solution. Were also investigated the behavior resulting upon soaking of hybrids into SBF. Samples were characterized by SEM, ATR-FTIR, TGA and XRD analysis. Results indicated decrease in spheres size with increase of glass and presence even pos-immersion, of Si, Ca and P associated to BG phase.

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Section: Crystallinity and Phase Characterization By X-ray Diffractionmentioning

confidence: 73%

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

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Alginate/Bioactive Glass Beads: Synthesis, Morphological and Compositional Changes Caused by SBF Immersion Method

Costa

Dias

2021

Mat. Res.

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“…Cellulose/ TiO2 First of all, sol-gel method is one of the routes for the synthesis of nanoparticles and nanocomposites. Under mild conditions, the sol-gel method allows the mixing of two or more dissimilar phases to form hybrids [32].In sol-gel methods, the production of homogenous nano-sized materials of complex composition can be easily produced with a cost-effective production [33]. From the name of the method, the sol represents the chemical transformation of the liquid into a gel phase and subsequently transition into solid oxide material [34].…”

Section: Preparation Methods Of Titanium Dioxidementioning

confidence: 99%

Preparation Method of Titanium Dioxide Nanoparticles and Its Application: An Update

Seman

Tarmizi

Ali

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Titanium dioxide (TiO2) is widely used because of its good biocompatibility and stability. Various methods were used to prepare TiO2 by using chemical, biological, and physical methods. In this paper, the currents methods to prepare TiO2 were evaluated either with or without using plant extract. The average particle size produced for different methods of technique and its application was also analyzed. Chemical methods use toxic chemical while physical methods such as gamma produce high energy and using biological method with plant extract is more environmentally friendly. This review gives an up-to-date summary of TiO2 produced using various synthesis methods with the focus on their particle sizes properties. Recent publications on this topic were extracted from related journals obtained from Science Direct online database from the year 2010 to 2021. Preparation methods, average particles sizes, and the applications of the synthesized TiO2 were evaluated and further discussed in this review. It was found that TiO2 of smaller particle sizes were obtained when synthesized without using plant extract. Furthermore, many researchers tend to combine TiO2 with other materials or composites to be mixed with polymers for various purposes of application especially wastewater treatment application.

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“…Several strategies are available to increase the mechanical strength of the hydrogel. For example, it is possible to design hybrid materials [11] by incorporating various particles or networks [27], for example, microcapsules [28], bioglass particles [29], hydroxyapatite particles [30,31] calcium, and magnesium carbonate particles [32][33][34][35]. In this case, it is identified that the cell senses the environment and literally "grabs" hard particles at surfaces [33].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotubes Transform Soft Gellan Gum Hydrogels into Hybrid Organic–Inorganic Coatings with Excellent Cell Growth Capability

Abalymov

Meeren

Volodkin

et al. 2021

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Carbone nanotubes (CNTs) possess distinct properties, for example, hardness, which is very complementary to biologically relevant soft polymeric and protein materials. Combining CNTs with bio-interfaces leads to obtaining new materials with advanced properties. In this work, we have designed novel organic-inorganic hybrid coatings by combining CNTs with gellan gum (GG) hydrogels. The surface topography of the samples is investigated using scanning electron microscopy and atomic force microscopy. Mechanical properties of synthesized hybrid materials are both assessed at the macro-scale and mapped at the nanoscale. A clear correlation between the CNT concentration and the hardness of the coatings is revealed. Cell culture studies show that effective cell growth is achieved at the CNT concentration of 15 mg/mL. The presented materials can open new perspectives for hybrid bio-interfaces and can serve as a platform for advanced cell culture.

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Synthesis of in-Situ Silica-Alginate Hybrid Hydrogels by a Sol-Gel Route

Cited by 11 publications

References 46 publications

Alginate/Bioactive Glass Beads: Synthesis, Morphological and Compositional Changes Caused by SBF Immersion Method

Alginate/Bioactive Glass Beads: Synthesis, Morphological and Compositional Changes Caused by SBF Immersion Method

Preparation Method of Titanium Dioxide Nanoparticles and Its Application: An Update

Carbon Nanotubes Transform Soft Gellan Gum Hydrogels into Hybrid Organic–Inorganic Coatings with Excellent Cell Growth Capability

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