硫酸钙晶须的气浮式表面改性

摘要

采用改性剂DZY-6和气浮式改性工艺对硫酸钙晶须进行表面改性,以改性泡沫产品产率、活化指数、接触角、显微图像等评定改性效果,并对气浮式改性工艺进行可行性分析.结果表明:新型改性剂能够在室温下对硫酸钙晶须表面改性,最佳工艺条件下改性产品产率为98.36％、接触角为115.00°、活化指数为99.5％;气浮式改性过程具有自发进行趋势,合适的搅拌速度,晶须能保持较好形貌,长径比较好;改性工艺实现在普通自来水中对硫酸钙晶须的表面改性,过程便于改性产品的及时分离,简化过滤和干燥作业,节约药剂和改性时间,降低成本.%Calcium sulfate whiskers were modified with gas floating modification technology to their surface modification and a new agent DZY-6 synthesized in laborato~ was chosen as the modifier.Gas floating modification effect was evaluated by the yield,activation index,contact angle and microscopic image of the modified foam products.The feasibility of gas floating modification process was analyzed.The results show that the new modifier modifies calcium sulfate whiskers at room temperature.The modified products with the yield of 98.36％,contact angle of 115.00° and activation index of 99.5％ were got under optimum conditions.The gas floating modification process has a tendency of spontaneity.Calcium sulfate whiskers have the good morphology within the suitable scope of the stirring speed,ensuring the whisker original length-diameter ratio.The modification process of calcium sulfate whiskers in the ordinary tap water and the separation of modified products timely are achieved,which simplifies the filtration and drying operations and saves the agent and time.