SCI和EI收录∣中国化工学会会刊

›› 2008, Vol. 16 ›› Issue (1): 119-123.

• REACTION KINETICS, CATALYSIS AND REACTION ENGINEERING • Previous Articles     Next Articles

Low Breakage and Size-controlled Preparation of NiCl2 Immobilized Hollow Polyurea Microcapsules

JI Hongbing1,2, LI Junli1, PEI Lixia1, GAO Jianrong2   

  1. 1. The Key Lab of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, South China University of Technology, Guangzhou 510640, China;
    2. State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China
  • Received:2006-10-08 Revised:2007-10-02 Online:2008-02-28 Published:2008-02-28
  • Supported by:
    the National Natural Science Foundation of China (No.20576045);the Opening Foundation of Zhejiang Provin-cial Top Key Discipline;the Program for New Century Excellent Talents in University (No.NCET-06-740).

Low Breakage and Size-controlled Preparation of NiCl2 Immobilized Hollow Polyurea Microcapsules

纪红兵1,2, 李俊丽1, 裴丽霞1, 高建荣2   

  1. 1. The Key Lab of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, South China University of Technology, Guangzhou 510640, China;
    2. State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China
  • 通讯作者: JI Hongbing, E-mail: cehbji@scut.edu.cn
  • 基金资助:
    the National Natural Science Foundation of China (No.20576045);the Opening Foundation of Zhejiang Provin-cial Top Key Discipline;the Program for New Century Excellent Talents in University (No.NCET-06-740).

Abstract: Polyurea microcapsules containing NiCl2 were prepared by interfacial polymerization between diisocy-anate and water with triethylamine as a catalyst in water-in-oil emulsion system. The influence of preparation conditions such as the dosage and feed mode of the catalyst, concentration of the encapsulated NiCl2, and concentration and structure of diisocyanates on the breakage of the microcapsules have been evaluated. The results show that breakage is strongly dependent on the rate of polymerization and stability of initial emulsion. The improved micro-capsules with low breakage have been produced under the optimum conditions. Furthermore, the obtained micro-capsules immobilizing NiCl2 as a recyclable catalyst is successfully used in benzaldehyde reduction.

Key words: microcapsules, water-in-oil emulsion, immobilization, NiCl2

摘要: Polyurea microcapsules containing NiCl2 were prepared by interfacial polymerization between diisocy-anate and water with triethylamine as a catalyst in water-in-oil emulsion system. The influence of preparation conditions such as the dosage and feed mode of the catalyst, concentration of the encapsulated NiCl2, and concentration and structure of diisocyanates on the breakage of the microcapsules have been evaluated. The results show that breakage is strongly dependent on the rate of polymerization and stability of initial emulsion. The improved micro-capsules with low breakage have been produced under the optimum conditions. Furthermore, the obtained micro-capsules immobilizing NiCl2 as a recyclable catalyst is successfully used in benzaldehyde reduction.

关键词: microcapsules, water-in-oil emulsion, immobilization, NiCl2