Synthesis and Characterization of Microcapsules with Chlorpyrifos Cores and Polyurea Walls

Chemical Research in Chinese Universities ›› 2006, Vol. 22 ›› Issue (3): 379-382.

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Synthesis and Characterization of Microcapsules with Chlorpyrifos Cores and Polyurea Walls

ZHANG Qiang¹, ZHANG Pei-pei¹, JIAO Qing-ze²

1. College of Science,Beijing Institute of Technology, Beijing 100081, P. R. China;
2. College of Chemistry and Environmental Science,Beijing Institute of Technology, Beijing 100081, P. R. China

Received:2005-12-31 Online:2006-06-24 Published:2011-08-06
Supported by:
Supported by the National Tenth Five-year Key Technology R & D Program(No. 2004BA308A25-15) and the Key Laboratory Foundation of Beijing City on Preparation and Processing of Novel Polymer Materials.

Abstract

Abstract: Microcapsules with chlorpyrifos cores and polyurea walls were synthesized with 2,4-tolylene diisocyanate as an oil-soluble monomer and ethylenediamine as a water-soluble monomer via an interfacial polycondensation reaction.The products were characterized by means of Fourier transform infrared spectrometry, ¹³C NMR spectrometry and ³¹P NMR spectrometry.The morphology, the particle size and the particle size distribution, and the thermal properties were also evaluated.The prepared microcapsules exhibit clear and smooth surfaces and have a mean diameter of 28.13 μm.These microcapsules also have a good thermal stability for long-term use, and have potential applications in minimizing the toxicity of chlorpyrifos through controlled release.

Key words: Microcapsule, Chlorpyrifos, Polyurea, Synthesis, Characterization

ZHANG Qiang, ZHANG Pei-pei, JIAO Qing-ze. Synthesis and Characterization of Microcapsules with Chlorpyrifos Cores and Polyurea Walls[J]. Chemical Research in Chinese Universities, 2006, 22(3): 379-382.

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Synthesis and Characterization of Microcapsules with Chlorpyrifos Cores and Polyurea Walls

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