用生物可降解材料聚乳酸(PLA)和桉木粉(WF)为原料,制备木粉/聚乳酸(WF/PLA)复合材料,为实现木塑复合材料完全生物降解提供新思路.采用傅立叶变换红外光谱仪(FT-IR)、扫描电子显微镜(SEM)、同步热分析仪(TG/DSC)及电子万能试验机研究了改性前后木粉的红外结构,WF/PLA 复合材料的微观形貌、热性能和结晶性能以及其力学性能.结果表明,偶联剂 KH-570的烷基结构成功接枝到了木粉表面；改性后的木粉在聚乳酸基体中分散均匀；木粉的添加有利于 WF/PLA 复合材料异相成核结晶和热稳定性的提高；木粉对 PLA 起到增强作用,当木粉填量为50％(质量分数)时,WF/PLA复合材料的拉伸强度最大,值为29．9 MPa,比纯PLA提高了10 MPa,木粉填量为30％(质量分数)时,WF/PLA复合材料的弯曲强度最大,值为43．2 MPa,比纯 PLA 提高了7．3 MP a .
Biodegradable materials,polylactic acid and old eucalyptus wood powder are used as raw material to prepare polylactic acid/wood flour composite (WF/PLA),which provide thought for wood plastic composite completely degradation.FT-IR spectrophotometer,scanning electron microscope and simultaneous thermal ana-lyzer were employed to research the interfacial connection property,thermal properties and crystallization prop-erty,together with mechanical property was studied of WF/PLA.The results showed that:alkyl of KH-570 was grafted to the WF surface;the heterogeneous nucleation crystallization and thermostability improved with the increase of filling WF.When content of wood flour was 50%,the maximum tensile strength of the compos-ite was 29.9 MPa,which was 10 MPa higher than pure polylactic acid;when content of wood flour was 30%, the maximum bending strength of the composite was 43.2 MPa,which was 7.3 MPa higher than pure polylactic acid.
参考文献
| [1] | 华晋,赵志敏,余伟,王田虎.聚乳酸/木粉复合材料的力学及吸水性能研究[J].功能材料,2011(10):1762-1764,1767. |
| [2] | 康宏亮,陈成,董丽松.聚乳酸共混体系的研究进展[J].高分子通报,2004(05):10-19. |
| [3] | 戚裕 .聚乳酸/木粉复合材料的制备与性能研究[D].南京理工大学,2007. |
| [4] | J. E. Sanders;S. D. Bale;T. Neumann .Tissue response to microfibers of different polymers: Polyester, polyethylene, polylactic acid, and polyurethane[J].Journal of biomedical materials research, Part B. Applied biomaterials,2002(2):222-227. |
| [5] | O.Martin;L.Averous .Poly(lactic acid): plasticization and properties of biodegradable multiphase systems[J].Polymer: The International Journal for the Science and Technology of Polymers,2001(14):6209-6219. |
| [6] | Yves-Marie Corre;Abderrahim Maazouz;Jannick Duchet .Batch foaming of chain extended PLA with supercritical CO2: Influence of the rheological properties and the process parameters on the cellular structure[J].The Journal of Supercritical Fluids,2011(1):177-188. |
| [7] | A. K. BLEDZKI;O. FARUK .Injection moulded microcellular wood fibre-polypropylene composites[J].Composites, Part A. Applied science and manufacturing,2006(9):1358-1367. |
| [8] | Matuana LM;Park CB;Balatinecz JJ;UNIV TORONTO FAC FORESTRY TORONTO ON M5S 3B3 CANADA. .Processing and cell morphology relationships for microcellular foamed PVC/wood-fiber composites[J].Polymer engineering and science,1997(7):1137-1147. |
| [9] | Mihai M;Huneault M A;Favis B D et al.Extrusion foaming of semi-crystalline PLA and PLA/thermoplastic starch blends[J].Macromolecular Bioscience,2007,7(07):907-920. |
| [10] | Huda MS;Drzal LT;Misra M;Mohanty AK .Wood-fiber-reinforced poly(lactic acid) composites: Evaluation of the physicomechanical and morphological properties[J].Journal of Applied Polymer Science,2006(5):4856-4869. |
| [11] | Miyata T.;Masuko T. .Crystallization behaviour of poly(L-lactide)[J].Polymer: The International Journal for the Science and Technology of Polymers,1998(22):5515-5521. |
| [12] | Bledzki A K;Faruk O;Kirschling H et al.Properties of different types of microcellular materials[J].Microcel-lular Polymer,2007,52(01):3-12. |
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