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

›› 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 Hongbing^1,2, LI Junli¹, PEI Lixia¹, GAO Jianrong²

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. 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

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

JI Hongbing, LI Junli, PEI Lixia, GAO Jianrong. Low Breakage and Size-controlled Preparation of NiCl₂ Immobilized Hollow Polyurea Microcapsules[J]. , 2008, 16(1): 119-123.

纪红兵, 李俊丽, 裴丽霞, 高建荣. Low Breakage and Size-controlled Preparation of NiCl₂ Immobilized Hollow Polyurea Microcapsules[J]. , 2008, 16(1): 119-123.

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

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

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