Preparation of calcium sulfate dihydrate and CALCIUM SULFATE HEMIHYDRATE (cas 13397-24-5) with controllable crystal morphology by using ethanol additive

Add time:08/04/2019    Source:sciencedirect.com

CALCIUM SULFATE HEMIHYDRATE (cas 13397-24-5) (CSH) with controlled crystal morphology has attracted broad interests due to its superior physical and chemical properties, as well as excellent biological performance. In this study, calcium sulfate dehydrate (CSD) was firstly synthesized via the reaction of H2SO4 and Ca(OH)2 using ethanol as morphology modifier. The prepared CSD was then converted to CSH through a hydrothermal method. It was found that the precipitation time of CSD powders was dramatically shortened and the morphology of CSD crystals was changed from thick tabular to short-rod with the increment in ethanol addition. The finally-obtained CSH crystals were found to have hexagonal prisms shape with smaller aspect ratios. The CSH powder with the desired crystal morphology would provide improved setting behavior and biological performance of the CSH bone cement.

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