粉体接触角法快速测定长江口沉积物的表面自由焓变  

Measuring Surface Free Enthalpy Change of Sediment of Chang Jiang River with Contact Angle Method

作　　者：魏红[1] 徐承天[1] 韩庆平[1] 陈邦林[1] 

机构地区：[1]华东师范大学化学系,上海200062

出　　处：《净水技术》2005年第6期1-3,共3页Water Purification Technology

摘　　要：根据Washburn原理研制的JF99A型粉体接触角测量仪,是利用渗透压力法测定粉体的接触角。在室温下,采用去离子水、无水乙醇、5%(m/m)的NaCl溶液、15%(V/V)的乙醇溶液为润湿液体,测定了长江口南港白龙港水域沉积物的相对接触角,从而可以确定沉积物的表面自由焓变。测定沉积物表面的润湿性疏水性质,就能反映表面上是否存在有机污染。用此方法测定具有操作简单等优点。On the basis of the Washburn principle , the contact angles of various liquids such as deionized water, sodium chloride solution of mass fraction 0.05, ethanol and ethanol-water solution of volume fraction 0. 15 on the sediment surface were measured by the JF99A contact angle meter with osmotic pressure method. The surface free enthalpy change was received from the relative contact angle of the sediment. The organic pollution of the surface was reflected with the measurement of the surface wet capability on the sediment. This method is more convenient and accurate.

关 键 词：Washburn法 粉体接触角 长江口沉积物 表面自由焓变 

分 类 号：TQ325.304[化学工程—合成树脂塑料工业] P736.41[天文地球—海洋地质]