期刊文献+

含PLA-PEG-PLA三嵌段共聚物的可降解聚氨酯的合成及表征 被引量:4

Synthesis and Characterization of Biodegradable Polyurethane Containing PLA-PEG-PLA Block Copolymers
下载PDF
导出
摘要 用聚乙二醇(PEG)和左旋丙交酯(L-LA)合成了不同比例的聚乳酸-聚乙二醇三嵌段共聚物(PLA-PEG-PLA),通过傅立叶变换红外光谱分析(FTIR)和核磁共振(1H NMR)测试分析了所得嵌段共聚物的结构。并以此嵌段共聚物为软段,用溶液法和六亚甲基二异氰酸酯(HD I)和扩链剂(BDO)以不同的比例合成了一系列聚氨酯,通过傅立叶变换红外光谱分析(FTIR)和差动量热扫描分析(DSC)表征聚氨酯结构。对此聚氨酯在37℃的PBS缓冲溶液(pH=7.4)中进行模拟体内环境的降解测试,通过失重率来评价聚氨酯的降解速率,结果表明降解速度与软硬段比例,共聚物中PEG/PLA的比例有关。并且实验表明此材料不会引起红细胞发生溶血。因此这种新型可降解聚氨酯材料可以根据各组分以及组分比例来调整聚合物的降解速率,此材料将在组织工程支架以及药物缓释载体领域有广阔的应用前景。 The tri-block copolymer ( polylactide- poly(ethylene glycol)- polylactide, PLA- PEG- PLA) were synthesized. The structures of the tri-block copolymer were analyzed by Fourier transform infrared (FTIR) and nuclear magnetic resonance spectroscopy (^1H -NMR). A series of polyurethane, which have different component ratios of PLA - PEG - PLA, 1,6 - hexamethylene diisocyanate (HDI) and 1,4 - butanediol( BDO), were synthesized by solution polymerization. FTIR and differential scanning calorimetry (DSC) were used to study the properties of the series of polyurethane. The degrees of degradation were investigated by exposing these PUs to the PBS buffer solution. With the increase of the ratios of soft/hard segment and PEG / PLA , the rates of mass loss enhance. The PLA - PEG - PLA - polyurethane can not make red cells hemolysis. These polyurethanes may be useful for a wide range of applications.
出处 《四川大学学报(工程科学版)》 EI CAS CSCD 北大核心 2007年第3期118-123,共6页 Journal of Sichuan University (Engineering Science Edition)
基金 国家自然科学基金资助项目(50673063)
关键词 丙交酯 聚乳酸 聚乙二醇 共聚物 聚氨酯 降解 lactide poly ( L - lactide) poly ( ethylene glycol) polyurethane biodegradable
  • 相关文献

参考文献13

  • 1Santerre J P,Woodhouse K,Laroche G,et al.Understanding the biodegradation of polyurethanes:from classical implants to tissue engineering materials[J].Biomaterials,2005,26:7457-7470.
  • 2Storey R F,Hickey T P.Degradable polyurethane networks based on D,L-lactide,glycolide,e-caprolactone,and trimethylene carbonate homopolyester and copolyester triols[J].Polymer,1994,35:830-838.
  • 3Hitunen K,Seppala J V,Harkonen M.Effect of catalyst and polymerization conditions on the preparation of low molecular weight lactic acid polymers[J].Macromolecules,1994,30:373-379.
  • 4Skarjag A,Woodhouse K A.Structure-property relationships of degradable polyurethane elastomers containing an amino acid-based chain extender[J].Journal of Applied Polymer Science,2000,75:1522-1534.
  • 5Gorna K,Gogolewski S.Biodegradable polyurethane implants Ⅱ in vitro degradation and calcification of materials from poly (e-caprolactone)-polyethylene)diols and various chain extenders[J].J Biomater Res,2002,60:592-606.
  • 6Skarja G A,Woodhouse K A.In vitro degradation and erosion of degradable,segmented polyurethanes containing amino acidbased chain extender[J].J Biomater Sci Polymer,2001,12:851-873.
  • 7Fromstein J D,Woodhouse K A.Elastomeric biodegradable polyurethane blends for soft tissue applications[J].J Biomater Sci Polymer,2002,13:391-406.
  • 8Schoental R.Carcinogenic and chronic effects of 4,4'-diaminodiphenyl methane,an epoxy resin hardener[J].Nature,1968,219:1162-1163.
  • 9Cardy R H.Carcinogenicity and chronic toxicity of 2,4-toluenediamine in F344 rats[J].J Natl Cancer Inst,1979,62:1107-1116.
  • 10Woo G L Y,Mittelman M W,Santerre J P.Synthesis and characterization of a novel biodegradable antimicrobial polymer[J].Biomaterials,2000,21:1235-1246.

同被引文献79

引证文献4

二级引证文献17

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部