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首页> 外文期刊>Transactions of Nonferrous Metals Society of China >Mechano-activated surface modification of calcium carbonate in wet stirred mill and its properties
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Mechano-activated surface modification of calcium carbonate in wet stirred mill and its properties

机译：湿法搅拌机中碳酸钙的机械活化表面改性及其性能

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摘要

Surface modification of calcium carbonate particles using sodium stearate(SDS) as a modification agent incorporated with the simultaneous wet ultra-fine grinding in the laboratory stirred mill was investigated. The physical properties and application properties of modified calcium carbonate were measured and evaluated. The action mechanism between SDS and calcium carbonate in the modification was studied by infrared spectrometry(IR) and X-ray photoelectron energy spectroscopy(XPS). The results indicate that the crushing mechanic force intensity can obviously influence the modification effect of calcium carbonate because of mechano-chemical effect. The hydrophilic surface of calcium carbonate is turned into hydrophobic after modification. The properties of polyethylene(PE) filled by modified calcium carbonate powder is markedly improved. And the adsorption of SDS could occur by chemical reaction with calcium carbonate surface.
机译：研究了在实验室搅拌磨机中采用硬脂酸钠（SDS）作为改性剂并同时进行湿法超细粉碎对碳酸钙颗粒进行的表面改性。测量和评估了改性碳酸钙的物理性质和应用性质。通过红外光谱（IR）和X射线光电子能谱（XPS）研究了SDS与碳酸钙在改性中的作用机理。结果表明，由于机械化学作用，压碎机械力强度可以明显影响碳酸钙的改性效果。改性后，碳酸钙的亲水性表面变成疏水性的。改性碳酸钙粉末填充的聚乙烯（PE）的性能得到明显改善。 SDS的吸附可通过与碳酸钙表面发生化学反应而发生。

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