采用聚乳酸(PLA)、聚氧化乙烯(PEO)、碳酸钙(CaCO3)熔融共混制备具有开孔结构的PLA多孔材料,借助于扫描电镜、孔隙率、热分析和压缩性能的测试方法,研究了连续混炼工艺对多孔材料结构和性能的影响.结果表明,过高或过低的转子转速和加料量都会导致多孔材料孔隙率的下降.当转子转速为600 r/min,加料量为2.61 kg/h时,孔隙率达到最大值76.8％.压缩模量和压缩强度分别为4.3 MPa和2.9 MPa.提高转子转速有利于多孔材料结晶性能的提高.
参考文献
| [1] | 倪硕;李澎;张卫国;李鹏声;贵浩然.制备软骨组织工程支架的方法[J].中国组织工程研究,2014(3):446-451. |
| [2] | Fan H;Tao H;Wu Y;Hu Y;Yan Y;Luo Z.TGF-beta3 immobilized PLGA-gelatin/chondroitin sulfate/hyaluronic acid hybrid scaffold for cartilage regeneration.[J].Journal of biomedical materials research, Part A,20104(4):982-992. |
| [3] | 白雁斌;黄晓琴;雷自强.聚乳酸类医用生物降解材料的研究进展[J].高分子通报,2006(3):46-51. |
| [4] | Gross KA;Rodriguez Lorenzo LM.Biodegradable composite scaffolds with an interconnected spherical network for bone tissue engineering.[J].Biomaterials,200420(20):4955-4962. |
| [5] | Cui Y;Liu Y;Cui Y.The nanocomposite scaffold of poly(lactide-co-glycolide) and hydroxyapatite surface-grafted with L-lactic acid oligomer for bone repair.[J].Acta biomaterialia,20097(7):2680-2692. |
| [6] | Joel Reignier;Michel A.Huneault.Preparation of interconnected poly(epsilon-caprolactone) porous scaffolds by a combination of polymer and salt particulate leaching[J].Polymer: The International Journal for the Science and Technology of Polymers,200613(13):4703-4717. |
| [7] | 林泽瑜;谢林生;马玉录.氯化钠填充制备聚乳酸多孔复合材料[J].高分子材料科学与工程,2015(6):138-143. |
| [8] | Ji-Zhao Liang;Lin Zhou;Chak-Yin Tang;Chi-Pong Tsui.Crystalline properties of poly(L-lactic acid) composites filled with nanometer calcium carbonate[J].Composites, Part B. Engineering,20131(1):1646-1650. |
| [9] | 张霞;谢林生;马玉录.双转子连续混炼机混炼段拉伸作用的研究[J].中国塑料,2010(3):108-113. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%