以辛酸亚锡为催化剂,合成了聚乳酸-聚乙二醇-聚乳酸(PLA-PEH-PLA)共聚物;基于溶胶凝胶(sol-gel)工艺,将PLA-PEGPLA与TiO_2溶胶杂化反应,制备了PLA-PEG-PLA/TiO_2杂化材料.采用红外光谱(FT-IR)、光电子能谱(XPS)、差示扫描量热(DSC)和X射线衍射(XRD)方法对杂化材料进行表征和分析.FT-IR和XPS分析结果显示,TiO_2溶胶与PLA-PEG-PLA间发生了杂化反应,形成了Ti-O-C键.DSC分析结果显示,随TiO_2%(质量分数,下同)含量的增加,杂化材料的耐热性能提高.XRD证实了杂化材料为无定型结构,有利于降解.
Using the stannous octanoate as catalyst, PLA-PEG-PLA copolymer was synthesized. Based on sol-gel process, poly(lacticacid) poly(ethyleneglycol) poly(lacticacid) (PLA PEG PLA)/TiO_2 hybrid material was prepared from PLA-PEG-PLA and TiO_2 sol. The hybrid material was characterized and analyzed with Fourier transform infrared spectroscopic(FT-IR), X-ray photoelectron specroscopy (XPS), differential scanning calorimetry (DSC) and X-ray diffraction(XRD) techniques. FT-IR and XPS results show that PLA-PEG-PLA can hybridize with TiO_2 sol and form Ti-O-C bonds. DSC results indicate that heat resistance of the hybrid material increases with the increase of TiO_2%. XRD results show that the hybrid material is amorphous, which is beneficial to degradation.
参考文献
| [1] | Drumright RE.;Henton DE.;Gruber PR. .Polylactic acid technology[J].Advanced Materials,2000(23):1841-1846. |
| [2] | L.-T. Lim;R. Auras;M. Rubino .Processing technologies for poly(lactic acid)[J].Progress in Polymer Science,2008(8):820-852. |
| [3] | Bhuvanesh Gupta;Nilesh Revagade;Jons Hilborn .Poly(lactic acid) fiber:An overview[J].Progress in Polymer Science,2007(4):455-482. |
| [4] | John A. Cicero;John R. Dorgan;Steven F. Dec .Phosphite stabilization effects on two-step melt-spun fibers of polyactide[J].Polymer Degradation and Stability,2002(1):95-105. |
| [5] | Nakayama, N;Hayashi, T .Preparation and characterization of poly(L-lactic acid)/TiO2 nanoparticle nanocomposite films with high transparency and efficient photodegradability[J].Polymer Degradation and Stability,2007(7):1255-1264. |
| [6] | Ruan G;Feng SS .Preparation and characterization of poly(lactic acid)-poly(ethylene glycol)-poly(lactic acid) (PLA-PEG-PLA) microspheres for controlled release of paclitaxel.[J].Biomaterials,2003(27):5037-5044. |
| [7] | Bendix D. .Chemical synthesis of polylactide and its copolymers for medical applications[J].Polymer Degradation and Stability,1998(1/3):129-135. |
| [8] | 庄韦,张建华,刘靖,张强,胡柏星,沈健.纳米TiO2/聚乳酸复合材料的制备和表征[J].复合材料学报,2008(03):8-11. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%