D-山梨醇对聚丙烯酸-水基氧化铝悬浮液流变性能的影响

doi:10.3724/SP.J.1077.2011.00545

无机材料学报 ›› 2011, Vol. 26 ›› Issue (5): 545-549.DOI: 10.3724/SP.J.1077.2011.00545

D-山梨醇对聚丙烯酸-水基氧化铝悬浮液流变性能的影响

于晓琳, 肖春霞, 郭露村

(南京工业大学材料科学与工程学院, 南京 210009)

收稿日期:2010-08-11 修回日期:2010-09-29 出版日期:2011-05-20 网络出版日期:2011-06-07
作者简介:于晓琳(1985-), 女, 硕士研究生. E-mail: yuxiaolin1123@163.com
基金资助:
江苏省科技支撑计划项目(BE2009169)

Effect of D-sorbitol on Rheology of Aqueous Alumina Suspensions with Poly(Acrylic Acid)

YU Xiao-Lin, XIAO Chun-Xia, GUO Lu-Cun

(College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China)

Received:2010-08-11 Revised:2010-09-29 Published:2011-05-20 Online:2011-06-07
Supported by:
Science and Technology Pillar Program (Industry) of Jiangsu Province (BE2009169)

摘要/Abstract

摘要： 研究了D-山梨醇(D-sorbitol)对聚丙烯酸(poly(acrylic acid))(PAA)稳定的水基氧化铝(Al₂O₃)悬浮液流变性能的影响. 实验发现: 在pH为9.0时, 对于固含量为30vol% ~ 40vol%的Al₂O₃悬浮液, 少量D-山梨醇的加入皆能明显提高其分散稳定性. 当D-山梨醇的添加量占分散剂总量(0.5wt%)的20%时, 悬浮液粘度最低. 且添加二元分散剂PAA/D-山梨醇的悬浮液具有更好的抗电解质性能. 分别对单一PAA分散的Al₂O₃及二元分散剂分散的Al₂O₃进行了红外光谱表征. 结合流变与红外实验结果, 分析了山梨醇的作用机理: 部分山梨醇吸附在Al₂O₃颗粒表面, 部分山梨醇与PAA以氢键形式结合, 增大了颗粒间的空间位阻, 提高了悬浮液的流变性能.

关键词: 聚丙烯酸, D-山梨醇, 氧化铝悬浮液, 流变性

Abstract: Effect of D-sorbitol addition on rheological properties of aqueous alumina suspensions dispersed with poly (acrylic acid) (PAA) was investigated. The results showed that for the aqueous alumina suspensions with 30vol%?40vol% solids loadings, small amount of D-sorbitol can significantly enhance the stability of alumina suspensions with PAA at pH=9.0. When the total amount of dispersant was 0.5wt% and the concentration of D-sorbitol was 20%, the viscosity of suspensions was the lowest. In addition, the suspensions dispersed with binary dispersant were less sensitive to ionic strength than the suspensions containing just the PAA. The role of PAA and D-sorbitol in the alumina suspensions was characterized by FTIR spectroscope. Based on the rheology and FTIR measurements, a schematic model was established to depict the mechanism for the effect of D-sorbitol in the presence of PAA. D-Sorbitol was absorbed both on alumina surface and the absorbed PAA, leading to an enhanced steric hindrance thus resulting better stability of the suspensions.

Key words: poly (acrylic acid), D-sorbitol, alumina suspension, rheology

中图分类号:

TQ174

于晓琳, 肖春霞, 郭露村. D-山梨醇对聚丙烯酸-水基氧化铝悬浮液流变性能的影响[J]. 无机材料学报, 2011, 26(5): 545-549.

YU Xiao-Lin, XIAO Chun-Xia, GUO Lu-Cun. Effect of D-sorbitol on Rheology of Aqueous Alumina Suspensions with Poly(Acrylic Acid)[J]. Journal of Inorganic Materials, 2011, 26(5): 545-549.

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D-山梨醇对聚丙烯酸-水基氧化铝悬浮液流变性能的影响

Effect of D-sorbitol on Rheology of Aqueous Alumina Suspensions with Poly(Acrylic Acid)

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