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Citation: LIU Qing, GAO Bao-Jiao. Preparation and Preliminary Application for Supporting Quaternary Ammonium Salt on Grafted Particles PS/SiO₂[J]. Chinese Journal of Applied Chemistry, ;2008, 25(7): 797-802. shu

Preparation and Preliminary Application for Supporting Quaternary Ammonium Salt on Grafted Particles PS/SiO₂

LIU Qing ,
GAO Bao-Jiao ^,

1.
Department of Chemical Engineering, North University of China, Taiyuan 030051

Corresponding author: GAO Bao-Jiao,
Received Date: 17 July 2007
Available Online: 25 September 2007
Fund Project: 山西省自然基金资助项目(MZ20020402) (MZ20020402)

Polystyrene was grafted on micron-sized silica gel particles in "grafting manner" in a solution polymerization system,and grafted particles PS/SiO₂ were prepared.Then the grafted polystyrene was chlorome-thylated with a novel chloromethylation reagent,1,4-bis(chloromethoxy) butane,and grafted particles CMPS/SiO₂,to which chloromethylated polystyrene was attached,were obtained.Finally,the quaternization between benzyl chloride on the macromolecular chains of CMPS and tertiary amine agent,and composite-type functional particles QPS/SiO₂,on which quaternary ammonium salt was supported,were gained.The chemical structure and composition of QPS/SiO₂ were characterized with FTIR and chemical analysis method.The effects of various factors on the quaternization of CMPS/SiO₂ were studied.The antibacterial activity of QPS/SiO₂ against Escherichia coil was studied preliminarily.The experimental results show that the quaternization of CMPS/SiO₂ is easy to carry out.The polarity of solvent,the kinds of tertiary amine agents and the reaction temperature all influenced the quaternization.The quaternary degree of the product is higher as the fine solvent of CMPS is used and tertiary amine agent with smaller steric hindrance is used.QPS/SiO₂ possesses a very high antibacterial activity,and the antibacterial ratio can reach to 100% only with a dosage of 10 g/L during a short contact of 3 min,indicating that QPS/SiO₂ is an excellent water-insoluble antibacterial material.The antibacterial ability of QPS/SiO₂ with higher quaternary degree is stronger,and QPS/SiO₂ prepared from tributyl amine that has longer hydrocarbon chain has a higher antibacterial activity.
- Polystyrene,
- Silica gel,
- Quaternary ammonium salt,
- Supporting,
- Grafting polymerization
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Preparation and Preliminary Application for Supporting Quaternary Ammonium Salt on Grafted Particles PS/SiO₂