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Your search keyword '"Li, Yinwen"' showing total 3 results
Start Over Author "Li, Yinwen" Topic dispersion (chemistry) Publisher elsevier b.v.
3 results on '"Li, Yinwen"'

1. Study on dispersion, adsorption and flow retaining behaviors of cement mortars with TPEG-type polyether kind polycarboxylate superplasticizers.

Author

Li, Yinwen, Yang, Chaolong, Zhang, Yunfei, Zheng, Jian, Guo, Huilong, and Lu, Mangeng

Subjects
*DISPERSION (Chemistry), *MORTAR, *POLYETHERS, *CARBOXYLATES, *PLASTICIZERS, *ADSORPTION (Chemistry)
Abstract

Highlights: [•] MA and SMAS were introduced into the TPEG-type PCEs to improve the dispersion and flow retention abilities. [•] This paper discussed the dispersion and adsorption effects of TPEG-type PCEs compared with conventional MPEG-type PCEs. [•] PCE2 has excellent water-reducing and flow-retaining abilities, which is attributed to the synergistic effects of steric hindrance and electrostatic repulsive force. [•] Application results showed that PCE2 can be used as high-range water reducer in practical applications. [Copyright &y& Elsevier]

Published
2014
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2. Synthesis of copolymers with cyclodextrin as pendants and its end group effect as superplasticizer.

Author

Li, Yinwen, Guo, Huilong, Zhang, Yunfei., Zheng, Jian, Li, Zhaoxia, Yang, Chenghua, and Lu, Mangeng

Subjects
*COPOLYMERIZATION, *CYCLODEXTRINS, *PLASTICIZERS, *MONOMERS, *VINYL polymers, *DISPERSION (Chemistry)
Abstract

Highlights: [•] The synthetic processes of β-cyclodextrin (CD) based functional monomers were improved and characterized in detail. [•] Based on the monovinyl CD based monomer, a new copolymer (PCDs) bearing CD pendants was synthesized and used as superplasticizer. [•] PCDs behaved excellent dispersion ability and strong retarding effect. [ABSTRACT FROM AUTHOR]

Published
2014
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3. Dispersion and rheological properties of concentrated kaolin suspensions with polycarboxylate copolymers bearing comb-like side chains.

Author

Li, Yinwen, Zhang, Yunfei, Zheng, Jian, Guo, Huilong, Yang, Chenghua, Li, Zhaoxia, and Lu, Mangeng

Subjects
*POLYCARBOXYLIC acids, *DISPERSION (Chemistry), *RHEOLOGY, *KAOLIN, *SUSPENSIONS (Chemistry), *COPOLYMERS, *ADSORPTION (Chemistry), *ACRYLATES
Abstract

Abstract: Comb-like polycarboxylate copolymers (PCs) were synthesized and first used as the dispersants for kaolin suspensions. The apparent viscosity, adsorption behavior, zeta potential, rheological behavior, and TEM images of concentrated kaolin slurries deflocculated with these copolymers were systematically investigated. Sodium acrylate homopolymer (SA) was selected as a reference in order to contribute to the knowledge of how the electrostatic interaction and molecular structure of these copolymers influenced the dispersion, adsorption, and rheological properties of colloidal kaolin suspensions. The results showed that the dispersion of kaolin slurries mainly depended on the synergistic effects of electrostatic interaction and steric hindrance for APEG type comb-like copolymers. PC2 bearing proper carboxylic groups and side chains produced stable dispersion and fluidity in concentrated kaolin slurries. Based on the electrostatic and steric effect of comb-like copolymers, the kaolin slurries displayed a shear thickening behavior, and the Herschel–Bulkley model well described their rheological behaviors. [Copyright &y& Elsevier]

Published
2014
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