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Citation: HAN Tao, LI Fu-Rong, ZHANG Yuan-Ming, TANG Yu, ZHOU Han-Xin. Preparation of PLA-mPEG Block Copolymer Micelle and Their Surface Tension[J]. Chinese Journal of Applied Chemistry, ;2005, 22(4): 403-406. shu

Preparation of PLA-mPEG Block Copolymer Micelle and Their Surface Tension

HAN Tao ^a,b ,
LI Fu-Rong ^a ,
ZHANG Yuan-Ming ^b ,
TANG Yu ^b ,
ZHOU Han-Xin ^a,,

1.
a Clinic Medical Research Centre, The Second Affiliated Hospital of Jinan University (Shenzhen People's Hospital), Shenzhen 518020;
2.
b Department of Chemistry, Jinan University, Guangzhou

Corresponding author: ZHOU Han-Xin,
Received Date: 8 July 2004
Available Online: 16 November 2004
Fund Project: 深圳市科技计划项目(2002K3121) (2002K3121)广东省自然科学基金(04006966)资助项目 (04006966)

An amphiphilic block copolymer poly (D,L-lactide-b-ethylene glycol)(PLA-mPEG) was synthesized via copolymerization of monomethoxypoly (ethylene glycol) with lactide prepared by the catalyst-free method.The copolymer PLA-mPEG₇₅₀ shows the characteristic structures of both PLA and mPEG₇₅₀ determined by FT-IR,and its molecular weight was determined by GPC.The surface tension of the aqueous solutions of the amphiphilic copolymer was measured and the critical micelle concentration (CMC) was calculated to be in the range of 3.5×10^-5~5.8×10^-5 mol/L,showing that the surface activity of these di-block copolymers is similar to that of typical surfactants.The copolymer can self-associate in aqueous solution to form micelle,and different micelle could be prepared by changing the conditions.
- lactide,
- monomethoxypoly (ethylene glycol),
- block copolymer,
- micelle,
- surface tension
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