不同阴离子型氢氧化镁铝胶体的合成及微粒助滤性能王松林.pdfVIP

31 2 ( ) ol.31 No. 2 2010 4 Journal of Qingdao University of Science and Technology(Natural Science Edition) Apr. 2010 : 1672-6987(2010) 02-0148-05 , ( , 266042) : 通过共沉淀法合成了不同阴离子型氢氧化镁铝胶体,并进行了表征; 同时考察了 氢氧化镁铝胶体对 料滤水和Zeta 电位的影响及其在造纸过程中的微粒助滤作用结 果表明: 共沉淀法制得的氢氧化镁铝胶体微粒呈片状结构,粒径均小于300 nm, 层间阴离 - 子为Cl 的氢氧化镁铝胶体微粒粒径最小; 微粒由片状结构叠加而成, 大部分的片状体呈 六边形结构, 结晶状态较好, 晶相比较均一氢氧化镁铝胶体通过电荷中和作用使得 料 的Zeta 电位升高, 其用量大于质量分数014%时可以明显改善 料的滤水性能 : 氢氧化镁铝; 共沉淀法; 助滤作用 : T S 727 : A Using Colloidal Magnesium Aluminum Hydroxides as Cationic Microparticulate Component in Paper Making Drainage WANG Song-lin, SH Shu-yang ( College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China) Abstract: Layered double hydroxides of Mg/ Al were synthesized by co-precipitation of magnesium chloride and aluminum chloride. The chemical formula, particle size, zeta potential, and crystal structure of the layered double hydroxide were analyzed through chemical, T EM and XRD methods. The drainageof hydroxides of Mg/ Al in paper mak- ing were carried by investigate zeta and beating degree of stocks. It was found that posi- tively charged magnesium aluminum hydroxide with particle diameters less than 300 nm could be prepared. Magnesium aluminum hydroxides have high cationic charge and crys- talline features. When used together with anionic polyacrylamide, magnesium aluminum hydroxide could increase the drainage of stocks with the dosage of 01 6 percent. Key words: magnesium aluminum hydroxide; co-precipitat