地热水环境中PTFE/PPS复合涂层表面CaCO_3垢成核行为  

Nucleation behavior of CaCO_3 scale on the surface of PTFE/PPS composite coatings in geothermal water environments

作　　者：吴坤湖[1] 李卫平[1] 刘慧丛[1] 朱立群[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院空天材料与服役教育部重点实验室,北京100191

出　　处：《北京科技大学学报》2010年第10期1321-1326,共6页Journal of University of Science and Technology Beijing

基　　金：国家高技术研究发展计划资助项目(No.2007AA05Z441)

摘　　要：采用扫描电子显微镜和能谱仪等测试方法研究了聚四氟乙烯(PTFE)/聚苯硫醚(PPS)复合涂层在静态模拟地热水环境中的阻垢性能,分析了PTFE/PPS涂层表面的微观结构对CaCO3垢成核行为的影响.结果表明:使用PTFE乳液掺杂PPS获得的复合涂层的表面呈多孔结构,PTFE在涂层孔内外的分布不均导致CaCO3垢晶核趋于在孔内和孔壁处优先形成和生长;PTFE/PPS涂层的接触角随着浸泡时间的延长而变小,表面结垢速度要明显小于304不锈钢和PPS涂层.The anti-scale performance of polytetrafluoroethylene （PTFE）/polyphenylene sulfide （PPS） composite coatings was studied by scanning electron microscopy （SEM） and energy dispersion spectrometry （EDS）. The effect of the surface microstructure of PTFE/PPS coatings on the nucleation behavior of CaCO3 scale was analyzed. The results indicate that the surface microstructure of PTFE （latex）-blended PPS composite coatings is poriferous, and PTFE asymmetrically distributes inside and outside holes on the coat- ing surface, inducing CaCO3 scale to nucleate firstly on the hole inside and wall. The contact angle of PTFE/PPS coatings decreases with prolonging immersion time. The increasing rate of scaling on PTFE/PPS coatings is obviously less than that of 304 stainless steel and PPS coatings.

关 键 词：复合涂层 地热水 结垢 表面能 

分 类 号：TB383[一般工业技术—材料科学与工程]