Impact-modified polylactide-calcium sulfate composites: Structure and properties

Calcium sulfate/hydroxyapatie (CaSO4/HA) composite bone fillers were fabricated through molding method. Their structure and properties were characterized by infrared spectroscope, scanning electronic spectroscope, x-ray diffraction and degradation test. The results show that HA crystals were attached to the CaSO4 crystals and prevented the growing of sulfate crystals. So their size is shorter than that of CaSO4 crystals prepared from pure CaSO4 semihydrate, and some even had defect. The resorption rate of CaSO4 bone fillers was decreased when HA was incorporated.

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The Effect of Phosphate Groups on the Structure and Properties of Bone Cements Based on Calcium Sulfate

Doklady Chemistry ◽

10.1134/s0012500820080017 ◽

2020 ◽

Vol 493 (2) ◽

pp. 117-120

Author(s):

D. R. Khayrutdinova ◽

O. S. Antonova ◽

M. A. Golgberg ◽

S. V. Smirnov ◽

P. A. Krokhicheva ◽

...

Keyword(s):

Calcium Sulfate ◽

Bone Cements ◽

Structure And Properties ◽

Phosphate Groups

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USING TECHNICAL SULFUR AS A STRUCTURING ADDITIVE FOR MINERAL BINDERS BASED ON CALCIUM SULFATE

Engineering Structures and Technologies ◽

10.3846/est.2019.11948 ◽

2020 ◽

Vol 11 (3) ◽

pp. 95-100

Author(s):

Grigorij I. Yakovlev ◽

Irina S. Polyanskih ◽

Anastasia F. Gordina ◽

Aleksandr N. Gumeniuk

Keyword(s):

Calcium Sulfate ◽

Building Materials ◽

Chemical Properties ◽

Additional Treatment ◽

Production Waste ◽

Structure And Properties ◽

Technical Parameters ◽

Research Activities ◽

And Performance ◽

Physical And Chemical

The article discusses physical and chemical characteristics of producing effective materials based on calcium sulfate dihydrate, the pretreated waste of man-made production being added at the stage of mixing the air binder. The high degree of consumption of exhaustible natural resources causes increased research activities in the field of application of industrial waste in construction. Using manmade waste, such as technical sulfur, as a modifier of the structure and properties of building materials is a significant step in solving environmental, resource, and economic problems. Industrial production of building materials today follows the principles of sustainable development and waste minimization by optimizing product formulations and reducing energy consumption required for their production. In addition, the improvement of quality and performance indicators of standardized products is relevant and sought-after. The need for efficient technologies for utilization of technical sulfur is due to large volumes of production and the environmental threat which accompanies the storage of its large volumes. Adding technical sulfur as a component of technological construction mixtures will create an alternative to the methods of utilization of this production waste. Physical and technical and physical and chemical properties of technical sulfur predetermine the possibility of its use, with certain additional treatment, as an effective modifier of the structure and properties of gypsum products. The results presented in the article prove the potential use of this production waste as an effective structure-forming additive, which has a positive effect on the physical and technical parameters of calcium sulfate-based materials.

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Gypsum composition with siltstone-based mineral modifier

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) ◽

10.3846/mbmst.2019.041 ◽

2019 ◽

Author(s):

Grigory Yakovlev ◽

Anastasiya Gordina ◽

Vladimir Khritankov ◽

Vadim Khozin ◽

Arina Shaybadullina ◽

...

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Calcium Sulfate ◽

Metamorphic Rock ◽

Mechanical Characteristics ◽

Physicomechanical Properties ◽

Structure And Properties ◽

Monolithic Structure ◽

Scanning Electron ◽

Crystalline Hydrates

The paper presents the results of studies of the structure and properties of the gypsum composition comprising 3% of crushed siltstone, a metamorphic rock. The structure and physicochemical properties of siltstone were studied, which predetermine its usage as a structuring additive in gypsum compositions. Adding crushed siltstone to the composition of a gypsum binder is shown to cause the compaction of the structure of the gypsum matrix due to changes in the morphology of crystalline hydrates of calcium sulfate and monolithic structure in general, and, consequently, the enhanced mechanical characteristics of the gypsum composition. Using scanning electron microscopy, differential thermography, and IR spectral analysis explain the change in the physicomechanical properties of the gypsum binder.

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ChemInform Abstract: Structure and Properties of Calcium Sulfate Sulfite Dodecahydrate.

ChemInform ◽

10.1002/chin.199138006 ◽

2010 ◽

Vol 22 (38) ◽

pp. no-no

Author(s):

R. MANGIO ◽

V. LANGER ◽

L.-G. JOHANSSON

Keyword(s):

Calcium Sulfate ◽

Structure And Properties ◽

Abstract Structure

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Fabrication of Calcium Sulfate/Tri-Calcium Phosphate Composite Bone Fillers through Molding Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.815.325 ◽

2013 ◽

Vol 815 ◽

pp. 325-328

Author(s):

Hong Sun ◽

Tao Wu ◽

Yong Qiang He ◽

Qiao Juan Gong ◽

Chen Zhong Yao ◽

...

Keyword(s):

Calcium Phosphate ◽

Calcium Sulfate ◽

Structure And Properties ◽

X Ray Diffraction ◽

X Ray ◽

Molding Method ◽

Resorption Rate ◽

Degradation Test ◽

Composite Bone

Calcium sulfate/tri-calcium phosphate (CaSO4/TCP) composite bone fillers were fabricated through molding method. Their structure and properties were characterized by infrared spectroscope, scanning electronic spectroscope, x-ray diffraction and degradation test. The results show that TCP crystals were attached to the CaSO4 crystals and prevented the growing of sulfate crystals. So their size is shorter than that of CaSO4 crystals prepared from pure CaSO4 semihydrate, and some even had defect. The resorption rate of CaSO4 bone fillers was decreased when TCP was incorporated.

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Effect of Calcium Sulfate Hemihydrate on Structure and Properties of Silk Fibroin/Calcium Phosphate Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.550-553.1139 ◽

2012 ◽

Vol 550-553 ◽

pp. 1139-1143 ◽

Cited By ~ 3

Author(s):

Meng Zhang ◽

Rui Juan Xie ◽

Yang Yang Huang

Keyword(s):

Compressive Strength ◽

Calcium Phosphate ◽

Silk Fibroin ◽

Calcium Sulfate ◽

Setting Time ◽

Structure And Properties ◽

Rapid Degradation ◽

Setting Reaction ◽

Natural Bone ◽

Calcium Sulfate Hemihydrate

In this paper, calcium sulfate hemihydrate (CSH) was added into silk fibroin/calcium phosphate (SF/CP) composites. The macropores formed by the SF was connected by micropores formed from rapid degradation of CSH, so that the structure of the composites is more close to the natural bone. The results indicated that the range of pore sizes around 30 - 308 microns were formed in the composites by SF. Compared to SF/CP composites without CSH, the injectability decreased, but the rate were both above 90%; the setting time increased, but were both less than 16min; the porosity increased. When the proportion of CSH was greater than 10%, the morphology of the product of setting reaction, i.e. the hydroxyapatite (HA) crystals, was influenced. When the proportion of CSH was less than 10%, the HA crystals appeared to be needle-like and plate-like crystals. When the proportion of CSH was greater than 10%, HA crystals were needle-like. The added amount of CSH had significant effects on compressive strength and work-of-compressive. The compressive strength and work-of-compressive decreased with increasing of CSH content in the composites.

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