Synthesis and physico-chemical characterization of a polysialate-hydroxyapatite composite for potential biomedical application

Zoulgami, Mariam; Lucas‐Girot, A.; Michaud, Véronique; Briard, P.; Gaude, J.; Oudadesse, Hassane

doi:10.1051/epjap:2002063

Cited by 13 publications

(8 citation statements)

References 10 publications

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“…Geopolymer is an environmentally friendly inorganicamorphous binder which exhibit ceramic like property in fire or at elevated temperatures. At ambient temperature geopolymers are amorphous and transform to crystalline above 500°C (Zoulgami et al 2002). Extensive researches have been conducted to study various mechanical and durability properties of geopolymer (Davidovits 1991;Duxson et al 2007;Rangan 2008;Duan et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Behaviour of Carbon and Basalt Fibres Reinforced Fly Ash Geopolymer at Elevated Temperatures

Shaikh

Haque

2018

Int J Concr Struct Mater

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This paper presents the behaviour of potassium activators synthesized fly ash geopolymer containing carbon and basalt fibre at ambient and elevated temperature. Six series of fly ash based geopolymer were cast where carbon and basalt fibre were added as 0.5, 1 and 1.5% by weight of fly ash. One extra control series without any fibre was also cast. Each series of samples were tested at ambient temperature and also heated at 200, 400, 600 and 800°C and thus a total of 35 series of samples were tested in this study. The result shows that the geopolymer containing 1 wt% basalt and 1 wt% carbon fibre exhibited better compressive strength, lower volumetric shrinkage and mass loss than other fibre contents. Among two fibres composites, the carbon fibre geopolymer exhibited better performance than its basalt fibre counterpart regardless of temperature. The microstructure of carbon fibre reinforced geopolymer composite is more compact containing fewer pores/voids than its basalt based counterpart at elevated temperatures. The results also support the fact that carbon fibre is better than basalt fibre at elevated temperature and showed better bonding with geopolymer at elevated temperature.

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Section: Introductionmentioning

confidence: 99%

Behaviour of Carbon and Basalt Fibres Reinforced Fly Ash Geopolymer at Elevated Temperatures

Shaikh

Haque

2018

Int J Concr Struct Mater

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“…However, structural characterization of both waste-based materials and the geopolymers synthesized from these materials is greatly complicated by the highly impure nature of these systems, and the use of natural minerals or melt-quenched materials in geopolymerization is not yet widespread. Composites consisting of a fiber matrix and a geopolymeric binder phase have also been shown to have interesting and potentially very useful properties. , Geopolymer−calcium phosphate composites are also being investigated for potential application as a biocompatible synthetic bone replacement material. , Preliminary testing of activation by sodium aluminate solution displayed some potential for further development, but further work in this area has not been performed. The primary focus of this investigation will therefore be the formation of geopolymers by alkali metal hydroxide or silicate activation of calcined clays, particularly calcined kaolinite clay (metakaolin).…”

Section: Introductionmentioning

confidence: 99%

“…18,19 Geopolymer-calcium phosphate composites are also being investigated for potential application as a biocompatible synthetic bone replacement material. 20,21 Preliminary testing of activation by sodium aluminate solution displayed some potential for further development, 22 but further work in this area has not been performed. The primary focus of this investigation will therefore be the formation of geopolymers by alkali metal hydroxide or silicate activation of calcined clays, particularly calcined kaolinite clay (metakaolin).…”

Section: Introductionmentioning

confidence: 99%

Do Geopolymers Actually Contain Nanocrystalline Zeolites? A Reexamination of Existing Results

2005

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Geopolymers are a class of aluminosilicate materials synthesized by alkaline or alkali-silicate activation of solid alumina-and silica-containing precursor materials at ambient or higher temperature. These products have highly significant commercial and technological potential, but the exact physicochemical nature of the geopolymeric binder phase has never before been determined. Through analysis of existing experimental results from the literature and comparison with related systems, in particular the hydrothermal synthesis of zeolites, geopolymeric binders are identified as being comprised of agglomerates of nanocrystalline zeolites compacted by an amorphous gel phase. The degree of crystallinity is largely determined by product formulation and synthesis conditions. Results from powder X-ray diffraction, microscopy, electron diffraction, mechanical strength testing, and calorimetry are analyzed and shown to be consistent with the theory presented. The implications of nanocrystallinity are discussed, and areas to be targeted in further experimental investigations are identified.

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“…Among biocompatible materials like calcium carbonate [1][2][3][4][5][6][7], calcium phosphate [8][9][10][11], aluminosilicate (geopolymers) [12][13][14] and Bioglass 1 [15][16][17], some of them, known as bioactive, are able to form an apatite-like layer on their surfaces when in contact with simulated body fluid (SBF) in vitro [18][19][20][21] or with physiological fluid in vivo [8,22,23]. This apatite-like layer, associated with bioreactivity [22], is speculated to be responsible for bone bonding [16,23].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the surface reactivity of a sol–gel derived glass in the ternary system SiO2–CaO–P2O5

Mami

Lucas‐Girot

Oudadesse

et al. 2008

Applied Surface Science

104

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Synthesis and physico-chemical characterization of a polysialate-hydroxyapatite composite for potential biomedical application

Cited by 13 publications

References 10 publications

Behaviour of Carbon and Basalt Fibres Reinforced Fly Ash Geopolymer at Elevated Temperatures

Behaviour of Carbon and Basalt Fibres Reinforced Fly Ash Geopolymer at Elevated Temperatures

Do Geopolymers Actually Contain Nanocrystalline Zeolites? A Reexamination of Existing Results

Investigation of the surface reactivity of a sol–gel derived glass in the ternary system SiO2–CaO–P2O5

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