硫酸钙晶须的表面改性研究

采用硼酸酯表面活性剂SBW-181对硫酸钙晶须进行了单因素条件改性试验,分别考察了改性剂用量、改性温度、改性时间和搅拌速率等工艺因素对硫酸钙晶须表面改性的影响.试验结果表明:硼酸酯表面活性剂SBW-181对硫酸钙晶须的改性效果较好,在最佳工艺条件下,改性产品的活化指数为0.996,接触角为103.4°.建立了硼酸酯表面活性剂SBW-181与硫酸钙晶须的作用模型.得出的结论对硫酸钙晶须表面改性的工业化生产具有重要的指导意义,并为硫酸钙晶须的应用研究奠定了理论基础.

On the Surface Modification of Calcium Sulphate Whiskers

The borate surfactant SBW-181 was used for the modification experiments of calcium sulphate whiskers on the conditions of individual factors. Influences of the technical factors such as surfactant dosage, modification temperature/time and stirring speed on the surface modification of calcium sulphate whiskers were studied. The modified calcium sulphate whiskers were characterized with activation index, contact angle, SEM and IR spectrum analysis, and the results indicated that the SBW-181 has good effect on surface modification of calcium sulphate whiskers. On the optimum technological conditions, the activation index of modified product is 0.996 with a contact angle of 103.4°. A reaction model was developed relevantly for the whiskers and surfactant, and a conclusion drawn from that plays a role of guidance in the industrialized surface modification of calcium sulphate whiskers as a theoretical reference offered for their applications.