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将干净的固体表面浸入液体,会有热量放出,即为浸湿热。浸湿热的研究具有一定的理论和实际意义,一方面可以给出固体表面积、表面极性以及固体与液体亲合力的一些信息,同时也是研究气体吸附热的有力补充,可用于对固体催化剂表面活性等的理论解释。 由于浸湿热的数值很小,所以其测定通常都在特制的精密量热计中进行,这种量热计的精度要求很高,一般实验室中自制较为困难。另外,浸湿热测定时样品预处理的要求很严格,通常都需在加热条件下真空脱气数小时,以除去固体表面吸附的气体。正因为上述两
The clean solid surface immersed in the liquid, there will be heat release, that is, soaking heat. Soaking heat has certain theoretical and practical significance. On the one hand, it can give some information about solid surface area, surface polarity and solid-liquid affinity. It is also a powerful supplement to study the heat of gas adsorption. It can be used to study the surface activity of solid catalyst The theoretical explanation. Since the value of soaking heat is very small, so the determination is usually carried out in a special precision calorimeter, the calorimeter of this high precision, the general laboratory is more difficult to make. In addition, the sample wetting heat treatment requirements of pretreatment is very strict, usually required under the conditions of vacuum degassing under vacuum for a few hours to remove the solid surface adsorption of gas. Because of these two