摘要
针对大量废弃的工业废渣严重污染环境,难以回收利用的问题,从排放量较大的硫酸铝废渣入手,采用扫描电子显微镜/X-射线能谱联用(SEM-EDXS)技术对硫酸铝废渣的组成进行分析.在此基础上,采用球磨力化学技术对硫酸铝废渣进行表面接枝改性处理,并对改性废渣进行了结构表征.实验结果表明,硫酸铝废渣的组成为SiO266.36%,Al2O36.48%,TiO22.25%,Fe2O30.66%,CaO1.17%.通过红外光谱和热失重分析证明,球磨过程在粉碎细化废渣的同时,可由力化学作用引发原位接枝聚合反应,将改性聚合物化学键接在废渣表面,使废渣具备与聚合物共混、在聚合物基体中均匀分散的基本条件.
Industrial dregs, which are difficult to recycle,become a source of environmental pollution. As a major rejected substance, the composition and structure of aluminum sulfate dregs were characterized by SEM-EDXS. Mechanochemical techniques of ball milling were applied to treat aluminum sulfate dregs for surface grafting modification. The results show that aluminum sulfate dregs is consist of 66.36% silica,6. 48% alumina,2.25% titanic oxide,0.66% ferric oxide and 1.17%calcic oxide. A series of grafting-modified dregs were prepared and the influence of monomer ratio,rotation speed and time of ball milling on grafting efficiency was investigated. It is demonstrated that mechanochemical techniques of ball-milling can smash up dregs as well as initiate in-situ grafting polymerization. Thus the usableness and uniform dispersion of dregs in polymer matrix can be ensured.
出处
《材料研究与应用》
CAS
2008年第4期241-244,共4页
Materials Research and Application
基金
国家自然科学基金项目(50773095)
广东省教育部产学研结合项目(2007B090400092)
佛山市科技发展专项资金项目(2007060B)
中山大学后备重点课题项目
关键词
硫酸铝废渣
球磨
力化学作用
接枝
表面改性
aluminum sulfate dregs
ball milling
mechanochemical
grafting
surface modification
