Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (12): 6-11,23.doi: 10.3969/j.issn.1000-565X.2013.12.002

• Chemistry,Chemical & Energy Engineering • Previous Articles     Next Articles

Effect of Relative Molecular Mass of Amino- Sulfonic Acid- Based Dispersants on Performances of Ceramic Slurry

Pang Yu- xia1 Gao Fei1 Deng Yong- hong1 Guo Su- fang1 Qiu Xue- qing1,2   

  1. 1.School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China;2.State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2013-06-25 Revised:2013-08-12 Online:2013-12-25 Published:2013-11-19
  • Contact: 邱学青(1965-)，男，教授，博士生导师，主要从事木质素的资源化利用研究 E-mail:cexqqiu@scut.edu.cn
  • About author:庞煜霞(1975-)，女，博士，副研究员，主要从事木质素磺酸盐系精细化学品的开发研究．E-mail:ceyxpang@scu.tedu.cn
  • Supported by:

    国家国际科技合作专项项目(2013DFA41670);广东省科技计划项目(2010A080804020， 2012B010200021)

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Abstract:

Five fractions of amino- sulfonic acid- based dispersant ASP with different relative molecular mass wereobtained via ultrafiltration,and their influences on the application performances of ceramic slurry were analyzed,with the corresponding mechanism being explored by analyzing the adsorption amount and the Zeta potential of thesefive ASP fractions on black mud particles.The results indicate that (1) the ceramic slurries added ASP fractionswith high relative molecular mass (more than 10000) are of less outflow time,high fluidity,dispersion andlow thixotropy; (2) the adsorption amount of ASP on black mud particles may increase with the relative molecularmass of ASP,thus improving the Zeta potential between black mud particles and enhancing the steric effect,whichmakes ceramic particles disperse better; (3) ASP without ultrafiltration possesses better dispersion property thaneach ultrafiltrated fraction,which means that the ASP fractions with different relative molecular mass work together toendow the ceramic slurry with best performance.This may be related to the improvement of adsorption amount due tothe multi- layer adsorption of ASP fractions with different relative molecular mass on the ceramic particle surface.

Key words: ceramic slurry, amino- sulfonic acid- based dispersant, relative molecular mass, adsorption, ultrafiltration

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