陶瓷添加剂ISOBAM对氧化铝浆料流变性能的影响  

Effect of ISOBAM on Rheological Behavior of Alumina Slurries

作　　者：林小清 王浩键 梁若繁 宋小姣 吴敏[1] 关康 彭诚[1] 杜杨 LIN Xiaoqing;WANG Haojian;LIANG Ruofan;SONG Xiaojiao;WU Min;GUAN Kang;PENG Cheng;DU Yang(School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China;Shanghai Kingstour Technology Co.Ltd.,Shanghai 201100,China)

机构地区：[1]华南理工大学材料科学与工程学院,广州510640 [2]上海劲途新材料科技有限公司,上海201100

出　　处：《硅酸盐通报》2021年第4期1338-1343,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51702100);广东扬帆计划引进创新创业团队项目(2017YT05C019)。

摘　　要：ISOBAM(异丁烯-马来酸酐共聚物)是一种新型的陶瓷添加剂,主要用作凝胶注模成型中浆料的分散剂和凝胶剂。以α-Al 2O 3为对象,分别研究了pH值、ISOBAM添加量和球磨时间对Al 2O 3浆料流变性质的影响及Al 2O 3浆料的凝胶机理。结果表明,ISOBAM对氧化铝浆料有明显的分散作用,其主要分散机理是ISOBAM通过羧基的氢键作用吸附在氧化铝颗粒表面,增加了颗粒表面负电荷密度,提高了颗粒Zeta电位绝对值。其中,添加0.2%质量分数的ISOBAM的浆料可以快速凝胶化,原因是浆料的pH值接近等电点,ISOBAM分子和氧化铝能够通过氢键作用而形成凝胶网络。ISOBAM is a novel ceramic additive and mainly used for gel-casting processing as dispersant and gelling agent.The effect of pH value,addition of ISOBAM and milling time on the rheological behavior of alumina slurries was investigated.The gelling mechanism of ISOBAM was also studied.The results show that ISOBAM has an apparent dispersing effect on alumina slurries,due to the interaction via hydrogen bonding between carboxyl group and alumina surface and the improvement of Zeta potential.The alumina slurry with 0.2%(mass fraction)ISOBAM gelatinizes rapidly,since its pH value is close to the isoelectric point.Elastic network forms between ISOBAM molecules and alumina particles via hydrogen bonds.

关 键 词：ISOBAM 氧化铝浆料 流变性 分散剂 凝胶剂 凝胶机理 

分 类 号：TQ174[化学工程—陶瓷工业]