title: Size-controlled preparation of α-calcium sulphate hemihydrate starting from calcium sulphate dihydrate in the presence of modifiers and the dissolution rate in simulated body fluid.
abstract: Different-sized α-calcium sulphate hemihydrate (α-CSH) rods were hydrothermally prepared by converting calcium sulphate dihydrate at 110-140°C in the presence of MgCl2, sodium citrate (CANa), and sodium dodecyl benzene sulfonate (SDBS) as the modifiers. The α-CSH rods with the average diameters and the average lengths in the ranges of 2.6-5.2 and 17.5-33.1 μm, respectively, were tunably prepared. The presence of the modifiers favoured the formation of small-sized α-CSH rods. The effect of the modifiers on decreasing the diameters of α-CSH rods was in an order of SDBS>CANa>MgCl2. The dissolution rates of the different-sized α-CSH rods prepared at 140°C in simulated body fluid were in an order of α-CSH (CANa)>α-CSH (MgCl2)>α-CSH (reference)>α-CSH (SDBS). The naked and small-sized α-CSH rods had high dissolution rates. The adsorption of SDBS on the surfaces of α-CSH rods decreased their dissolution rates.
authors.affiliation: Faculty of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
authors.forename: Jianmin
authors.initials: J
authors.lastname: Chen
authors.forename: Jun
authors.initials: J
authors.lastname: Gao
authors.forename: Hengbo
authors.initials: H
authors.lastname: Yin
authors.forename: Fanggang
authors.initials: F
authors.lastname: Liu
authors.forename: Aili
authors.initials: A
authors.lastname: Wang
authors.forename: Yongqiang
authors.initials: Y
authors.lastname: Zhu
authors.forename: Zhanao
authors.initials: Z
authors.lastname: Wu
authors.forename: Tingshun
authors.initials: T
authors.lastname: Jiang
authors.forename: Daming
authors.initials: D
authors.lastname: Qin
authors.forename: Bujun
authors.initials: B
authors.lastname: Chen
authors.forename: Yuqin
authors.initials: Y
authors.lastname: Ji
authors.forename: Min
authors.initials: M
authors.lastname: Sun
mesh_terms: D000327:Adsorption; D001557:Benzenesulfonates / Q000737:chemistry; D001826:Body Fluids / Q000737:chemistry; D002133:Calcium Sulfate / Q000737:chemistry*; D002951:Citrates / Q000737:chemistry; D006358:Hot Temperature; D015636:Magnesium Chloride / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D000077559:Sodium Citrate; D014961:X-Ray Diffraction
chemical_list: D001557:Benzenesulfonates; D002951:Citrates; D015636:Magnesium Chloride; D000077559:Sodium Citrate; C001114:dodecylbenzenesulfonic acid; D002133:Calcium Sulfate