硅藻土调湿材料的性能及调湿机理研究  

Properties of diatomite humidity-controlling materials and its humidity controlling mechanism

作　　者：胡明玉[1] 付超[1] 

机构地区：[1]南昌大学建筑工程学院,南昌330031

出　　处：《功能材料》2017年第4期4007-4012,共6页Journal of Functional Materials

基　　金：江西省水利厅科技资助项目(KT201331)

摘　　要：通过实验测试了硅藻土调湿材料的强度、耐水性、调湿性能,并根据扫描电镜微观分析及材料的吸附/解吸理论研究了硅藻土材料的调湿机理。研究表明,通过无机改性掺合料的作用,可以使硅藻土调湿材料28和60d抗压强度分别大于5和6 MPa,软化系数分别达到0.65和0.74。硅藻土调湿材料的最大平衡含湿率近20%,且吸放湿速率高,具有优异的调湿性能。硅藻土调湿材料对空气中水分子的作用主要为毛细孔道效应和表面化学作用,其次为表面物理吸附作用。The strength,water resistance,humidity-controlling performance of the diatomite humidity-controlling material has been tested experimentally.The humidity-controlling mechanism of the diatomite humiditycontrolling material is investigated based on the micro-analysis of the scanning electron microscope and theory of moisture absorption/desorption of materials.The results show that due to the action of inorganic modified admixture,the compressive strength of the diatomite humidity-controlling material at 28 and 60dare greater than 5 and 6 MPa,respectively,and the softening coefficient can reach 0.65 and 0.74,respectively.In addition,the maximum equilibrium moisture content of the material is close to 20%,and the moisture absorption/desorption rate is pretty high,which indicates that the material has an excellent humidity-controlling performance.The main role that the diatomite humidity-controlling material plays on the water molecules in the air is the capillary effect and surface chemical adsorption,and the second one is the surface physical adsorption.

关 键 词：硅藻土 调湿材料 抗压强度 软化系数 平衡含湿率 

分 类 号：TB34[一般工业技术—材料科学与工程]