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Design and characteristic analysis of a new nozzle for preparing microencapsulated particles by RESS

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Abstract

A new nozzle was designed for the technology of making microencapsulated particles by rapid expansion of supercritical solution (RESS). The design is based on the theory of gas dynamics in which the potential energy of high stagnation pressure is converted totally into effective velocity energy. Therefore, a high momentum of the exit jet can be obtained for improving the capability of removing molten debris quickly. Furthermore, the microencapsulated red phosphorus particles were prepared by RESS with the new nozzle, and the structure and property of the microencapsulated red phosphorus particles were characterized by the SEM images, droplet concentration distributions, and moisture absorption ratio. The results show that the process can effectively encapsulate the red phosphorus particles with the paraffin.

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Acknowledgments

This work was supported by National Natural Science Foundation of China (N 50303005), Natural Science Foundation of Shanxi Province (N 20041029), and Project of Science and Technology of Shanxi Province (N 012078). The authors are grateful for the financial support.

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Authors and Affiliations

  1. Research Center for Engineering Technology of Polymeric Composites of Shanxi Province, North University of China, Taiyuan, 030051, China

    Ya-qing Liu, Fa-xing Zhang, You-yi Sun & Gui-zhe Zhao

  2. Shandong Universities, Jinan, 250100, China

    Ya-qing Liu & Xiao-ying Li

  3. Shandong Non-Metallic Materials Research Institute, Jinan, 250031, China

    Ya-qing Liu & Xiao-ying Li

  4. China North Industries Group Corporation, Beijing, 100089, China

    Xiao-ying Li

Authors
  1. Ya-qing Liu
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  2. Xiao-ying Li
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  3. Fa-xing Zhang
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  4. You-yi Sun
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  5. Gui-zhe Zhao
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Correspondence to Ya-qing Liu or You-yi Sun.

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Liu, Yq., Li, Xy., Zhang, Fx. et al. Design and characteristic analysis of a new nozzle for preparing microencapsulated particles by RESS. J Coat Technol Res 6, 377–382 (2009). https://doi.org/10.1007/s11998-008-9145-1

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  • DOI: https://doi.org/10.1007/s11998-008-9145-1

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