焙烧和氯化钙改性对硅藻土调湿性能的影响  

Effect of roasting and calcium chloride modification on the moisture regulating properties of diatomaceous earth

作　　者：杨耀东 段晓涵 高文元 YANG Yaodong;DUAN Xiaohan;GAO Wenyuan(School of Textile and Material Engineering,Dalian Polytechnic University,Dalian 116034,China)

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2024年第4期281-285,共5页Journal of Dalian Polytechnic University

基　　金：辽宁省教育厅科学研究经费项目(J2020005)。

摘　　要：以低品位硅藻土为原料,采用先焙烧后氯化钙改性处理工艺制备硅藻土调湿材料。通过X射线衍射仪、傅里叶变换红外光谱仪、扫描电子显微镜、能谱仪和全自动比表面及孔隙度分析仪等对焙烧前后及改性硅藻土进行表征,研究了焙烧工艺及改性条件对硅藻土结构与性能的影响。结果表明,低品位硅藻土经过焙烧处理,去除了有机杂质,比表面积从16.95 m^(2)/g增大到17.46 m^(2)/g,放湿速率从7.80%增大到12.97%,放湿能力得到改善;经过氯化钙改性,氯化钙颗粒包覆在硅藻土表面及孔道中,吸湿速率从18.02%增大到100.92%,大大提高了吸湿能力。The low-grade diatomite humidity-regulating materials were prepared by calcining low-grade diatomite and modifying it with calcium chloride.To investigate the influence of the calcination process and modification conditions on diatomaceous earth,the modified diatomite before and after calcination was characterized by X ray diffraction,Fourier transform infrared spectrometer,scanning electron microscope,energy dispersive spectrometer,automatic specific surface area and porosity analyzer.The related results suggested that the organic impurities in low-grade diatomite were removed by calcination,while the specific surface area was increased from 16.95 to 17.46 m^(2)/g and the moisture release rate was increased from 7.80%to 12.97%,indicating the moisture release ability was improved.Furthermore,the modification process with calcium chloride showed that,with the calcium chloride particles coating the surface and pores of diatomite,the moisture absorption rate was increased from 18.02%to 100.92%,which significantly enhanced the moisture absorption ability of diatomaceous earth.

关 键 词：硅藻土 焙烧 氯化钙 调湿性能 

分 类 号：TU56[建筑科学—建筑技术科学]