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Effect of ethylene glycol on hydrothermal formation of calcium sulfate hemihydrate whiskers with high aspect ratios

机译:乙二醇对高长径比硫酸钙半水合晶须水热形成的影响

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The effect of ethylene glycol on hydrothermal formation of calcium sulfate hemihydrate (HH) with high aspect ratios was investigated in this work. HH whiskers with a preferential growth along the c axis and an average aspect ratio up to 400 were synthesized using oyster shells as raw materials in the presence of 3.76 x 10(-3) mol L-1 ethylene glycol. The preferential adsorption of ethylene glycol on the negative (200), (400), and (220) facets was confirmed by IR, XRD, XPS, and zeta potential measurements. The experimental results indicated that the adsorption of ethylene glycol promoted the 1-D growth of HH whiskers, leading to the formation of whiskers with high aspect ratios.
机译:在这项工作中,研究了乙二醇对高纵横比硫酸钙半水合物(HH)水热形成的影响。以牡蛎壳为原料,在3.76 x 10(-3)mol L-1乙二醇存在下,合成了沿c轴优先生长且平均长径比高达400的HH晶须。乙二醇在负(200),(400)和(220)面上的优先吸附已通过IR,XRD,XPS和zeta电位测量得到证实。实验结果表明,乙二醇的吸附促进了HH晶须的一维生长,从而导致了高纵横比的晶须的形成。

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