磷石膏的疏水改性研究现状及进展  

Research status and progress of hydrophobic modification of phosphogypsum

作　　者：李远霞 曾芳芳 杨珖 李燚 陈忠华 何松涛 刘其斌[1] LI Yuanxia;ZENG Fangfang;YANG Guang;LI Yi;CHEN Zhonghua;HE Songtao;LIU Qibin(College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China;Guizhou Phosphating Green Environmental Protection Industry Co.Ltd.,Guiyang 551199,China;Baoshan Vocational College,Baoshan 678000,China)

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025 [2]贵州磷化绿色环保产业有限公司,贵州贵阳551199 [3]保山职业学院,贵州保山678000

出　　处：《新型建筑材料》2024年第7期23-31,38,共10页New Building Materials

摘　　要：磷石膏是湿法生产磷酸排放的固体废弃物,每生产1 t磷酸就会排出约5 t磷石膏。磷石膏表面具有亲水性,在高湿度环境下或接触水分之后易出现溶融蠕变效应,对力学性能造成负面影响,限制了其在建筑材料领域中的应用。全面综述了3种制备疏水磷石膏基材料的方法:表面疏水涂层、内掺疏水剂、有机/无机复合。通过比较各方法的优缺点,发现有机/无机复合能整体提高磷石膏基材料的疏水性和力学性能。Phosphogypsum(PG)is a solid waste discharged in the production of wet-process phosphoric acid.Nearly 5 tons of phosphogypsum will be discharged for every ton of wet-process phosphoric acid produced.Phosphogypsum surface is hydrophilic,and it is prone to melt creep effect in high humidity environment or after contacting with water,which has a negative impact on mechanical properties and limits its application in building materials field.In this paper,three methods for preparing hydrophobic phosphogypsum-based materials are comprehensively reviewed:surface hydrophobic coating,internal hydrophobic agent and organic/inorganic composite.By comparing the advantages and disadvantages of each method,it is found that organic/inorganic composite can improve the hydrophobicity and mechanical properties of phosphogypsum-based materials as a whole.

关 键 词：磷石膏 疏水 改性 有机/无机复合 

分 类 号：TU522.09[建筑科学—建筑技术科学]