高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (8): 1265.

• 论文 • 上一篇    下一篇

丙烯酸类共聚物对Al2O3表面及沉积物分形特性的影响

刘阳桥, 高濂, 郭景坤   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室, 上海 200050
  • 收稿日期:1999-08-25 出版日期:2000-08-24 发布日期:2000-08-24
  • 通讯作者: 高　濂(1945年出生),男,博士,研究员,从事纳米材料和高温结构陶瓷研究.E-mail:liangaoc@online.sh.cn
  • 基金资助:

    国家攀登计划“纳米材料科学”项目资助

Effect of Acrylic Copolymers on the Surface Properties of Alumina and the Fractal Characteristics of the Sediments

LIU Yang-Qiao, GAO Lian, GUO Jing-Kun   

  1. The State Key Laborator of High Performance Ceramics & Superfine Microstructure Studies, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:1999-08-25 Online:2000-08-24 Published:2000-08-24

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摘要： 通过测定丙烯酸-丙烯酸酯共聚物在Al2O3粉体上的等温吸附曲线及悬浮液的ζ电位,研究了共聚物对粉体表面特性的影响.结果表明,共聚物的加入可使Al2O3的等电点向低pH方向移动,并可显著改善浆料的稳定性.FTIR研究表明,吸附的共聚物通过羧基与粉体表面的铝离子发生相互作用.通过对沉积物表面SEM照片的灰度分析发现,其表面形貌具有分形特征.对形貌分维值Df的测定表明,Df的大小与分散剂对Al2O3的稳定效果有一定关系.

关键词: 共聚物, 氧化铝, 吸附, 分维值

Abstract: An acrylic copolymer was employed as a dispersant for Al2O3 aqueous suspensions. Surface chemistry of the suspensions was evaluated via isotherm adsorption, FTIRand ζ potential measurments. The optimum amount of dispersant was 2.0%. The fractal theory was used to analyze the surface morphology of the sediments. The results showed that the fractal dimension value of sediments increased with increasing dispersant amount in the experimental range.

Key words: Copolymer, Alumina, Adsorption, Fractal dimension

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