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Citation: YANG Yuan, LI Li-Hua, LUO Bing-Hong, ZHOU Chang-Ren. Preparation and Application of Novel Biodegradable Crosslinkers[J]. Chinese Journal of Applied Chemistry, ;2006, 23(4): 414-418. shu

Preparation and Application of Novel Biodegradable Crosslinkers

1.
Department of Materials Science and Technology, Jinan University, Guangzhou 510632

Corresponding author: ZHOU Chang-Ren,
Received Date: 8 July 2005
Available Online: 2 October 2005
Fund Project: 国家自然科学基金(30500128) (30500128)广东省自然科学基金(04300673)资助项目 (04300673)

A series of biodegradable crosslinkers terminated by double epoxy groups was prepared from epoxypropane chloride and the intermediates of poly(lactic acid)-poly(ethylene glycol)(PLA-PEG-PLA) in the presence of NaH.The molecular weights of the intermediates were measured with GPC.The optimized process parameters were obtained by orthogonal trials.The crosslinker terminated with active epoxy groups was used to react with chitosan which has many amido and hydroxy groups.The crosslinked materials were characterized by water absorbency,surface contact angle and mechanical property analyses.The results of the orthogonal trials indicated that the crosslinker was best prepared at 40℃ for 4 h in a reactant ratio of 1:2,and the epoxy value was 1.034 mmol/g.The test of water absorption and surface contact angles and tensile tests showed that both the hydrophilicity and the mechanical properties of the crosslinked chitosan had been improved.
- biomaterials epoxy,
- crosslinking,
- chitosan,
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