腈纶废丝改性水解物的制备及其絮凝效果

Preparation and flocculation properties of the modified hydrolysate by polyacrylonitrile waste silk

常压时在碱性条件下水解腈纶废丝可生成丙烯酰胺和丙烯酸的无规共聚物,此法在得到有机高分子絮凝剂的同时又能避免废腈纶对环境的污染。在常压、95～100℃下用乙二胺对废腈纶碱性水解物进行改性,制得含有酰胺基、羧钠基、羧基及羧铵基等活性基团的高分子絮凝剂,研究了改性水解产物对废水的絮凝性能,并由红外光谱对其结构进行了分析。结果表明,乙二胺在腈纶碱性水解过程中能够促进腈基的水解,改性水解物对废水的脱色、除浊、去油、除酚效果均明显优于水解产物,经测定其除浊、去油、除酚效果分别达到98%、70%、70%。

The irregular polymer of acrylamide and acrylic acid was produced by alkaline hydrolysis polyacrylonitrile waste silk at general pressure. The organic polymer flocculant could be produced and the pollution of polyacrylonitrile waste silk could be avoided by this way. The polymer flocculant with —CONH_2, —COONa, —COOH and several active groups was prepared by the modified hydropolyacrylonitrile with ethylenediamine at general pressure and temperature 95～100℃ in this paper. The flocculation properties of modified hydrolysate were studied and its structure was analyzed by IR. The result shows that the hydrolysis could be promoted by ethylenediamine and the modified product could more effectively decrease the pollutant content used to treat wastewater containing dye,oil and phenol compared with hydrolysate. Its efficiency of removal turbitity, oil and phenol could reach 98%, 70% and 70% respectivly.