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Synthesis and Properties of Environmentally Friendly Calcium Phosphate Inhibitor

Synthese und Eigenschaften eines umweltfreundlichen Kalziumphosphatinhibitors
K. Du , Y.-M. Zhou , L.-Q. Wang and Y.-Y. Wang

Abstract

The purpose of the paper is to provide a non-phosphorus and nitrogen free calcium phosphate inhibitor maleic anhydride-allyloxy polyethoxy carboxylate. The approach is that synthesized monomer allyloxy polyethoxy carboxylate from allyloxy polyethoxy ether and chloracetic acid, and then prepared maleic anhydride-allyloxy polyethoxy carboxylate by free radical polymerization. Structures of allyloxy polyethoxy carboxylate and maleic anhydride-allyloxy polyethoxy carboxylate were characterized through FT-IR and 1H-NMR. Influence of monomer mole ratio in maleic anhydride-allyloxy polyethoxy carboxylate and viscosity-average molecular weight of maleic anhydride-allyloxy polyethoxy carboxylate on its calcium phosphate inhibition performance was discussed. Calcium tolerance and calcium phosphate inhibition capability of maleic anhydride-allyloxy polyethoxy carboxylate was compared with the latest generation of calcium phosphate inhibitor maleic anhydride-ammonium allylpolyethoxy sulphate, and other two kinds of known inhibitor acrylic acid/2-hydroxypropyl acrylate and acrylic acid/acrylamido-2-methyl-1-propane sulfonic acid. As a result, monomer mole ratio and viscosity-average molecular weight has great impact on property of maleic anhydride-allyloxy polyethoxy carboxylate. Calcium tolerance and calcium phosphate inhibition of maleic anhydride-allyloxy polyethoxy carboxylate is similar to maleic anhydride-ammonium allylpolyethoxy sulphate. The results reveal that maleic anhydride-allyloxy polyethoxy carboxylate is an excellent green calcium phosphate inhibitor.

Kurzfassung

Das Ziel dieser Arbeit ist die Bereitstellung eines phosphor- und stickstofffreien Kalziumphosphatinhibitors aus Maleinsäureanhydrid-Allyloxypolyethoxycarboxylat. Der Ansatz ist, dass aus Allyloxypolyethoxyether und Chloressigsäure synthetisiertes Allyloxypolyethoxycarboxylat-Monomer dann durch Radikalpolymerisation zu Maleinsäureanhydrid-Allyloxypolyethoxycarboxylat dargestellt wird. Die Strukturen von Allyloxypolyethoxycarboxylat und Maleinsäureanhydrid-Allyloxypolyethoxycarboxylat wurden durch FT-IR und 1H-NMR charakterisiert. Der Einfluss des molaren Verhältnisses an Monomer und Viskositätsmittel des Molekulargewichtes von Maleinsäureanhydrid-Allyloxypolyethoxycarboxylat auf die Leistung der Kalziumphosphatinhibition wird diskutiert. Die Kalziumtoleranz und das Leistungsvermögen der Kalziumphosphatinhibition von Maleinsäureanhydrid-Allyloxypolyethoxycarboxylat wurde mit der neuesten Generation von Kalziumphosphatinhibitoren, Maleinsäureanhydrid-Amoniumallyloxypolyethoxysulfat sowie mit zwei weiteren bekannten Inhibitoren, Acrylsäure/2-hydroxypropylacrylat und Acrylsäure/Acrylamido-2-methyl-1-propansulfonsäure, verglichen. Das molare Verhältnis an Monomer und das Viskositätsmittel des Molekulargewichtes haben eine große Auswirkung auf die Eigenschaften von Maleinsäureanhydrid-Allyloxypolyethoxycarboxylat. Die Kalziumtoleranz und die Kalziumphosphatinhibition von Maleinsäureanhydrid-Allyloxypolyethoxycarboxylat ist ähnlich wie die von Maleinsäureanhydrid-Amoniumallyloxypolyethoxysulfat. Die Ergebnisse machen deutlich, dass Maleinsäureanhydrid-Allyloxypolyethoxycarboxylat ein ausgezeichneter, grüner“ Kalziumphosphatinhibitior ist.


Yuming Zhou, School of Chemistry and Chemical Engineering, Southeast University, 2# Southeast University Road, Jiangning District. Nanjing. Jiangsu. 211189, ChinaTel.: +862552090617, Fax: +862552090617, E-Mail:

Du Kun was born in 1973. She is a doctoral student at Southeast University. She obtained her master degree in Guangxi University. Her main field of research is applications of water soluble polymers in industrial water systems and green chemical.

Prof. Zhou Yuming was born in 1964. He graduated from Nanjing University in 1986. He obtained his PhD in Department of Biomedical Southeast University. His research interests lie in organic material, fine chemicals and environmental protection. At the moment is associate dean of the School of Chemistry and Chemical Engineering Southeast University.

Wang Liuqian was born in 1984. She received her bachelor degree in applied chemical from Southeast University in 2007. Her main scientific interest has been the synthesis and properties of environment friendly materials.

Wang Yingying was born in 1983. She received her bachelor degree in applied chemical from Southeast University in 2007. She is now working at Jianghai Vocational and Technical College, Jiangsu, Nanjing, China. Her main field of research is synthesis and application of surfactants.


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Received: 2008-09-07
Revised: 2009-01-28
Published Online: 2013-04-02
Published in Print: 2009-05-01

© 2009, Carl Hanser Publisher, Munich

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