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Effect of n-HA content on the isothermal crystallization, morphology and mechanical property of n-HA/PLGA composites

机译：n-HA含量对n-HA / PLGA复合材料等温结晶，形态和力学性能的影响

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摘要

A serials of g-n-HA/PLGA composites with surface-modified g-n-HA of 1%, 3%. 6%, 10% and 15% in weight were prepared by solution mixing. The isothermal crystallization, morphology and mechanical property of g-n-HA/PLGA composites were investigated by differential scanning calorimeter (DSC), scanning electron microscope (SEM) and electromechanical universal tester. The results showed that Avrami equation was suitable for describing the isothermal crystallization process in this system, and the crystallization rate of g-n-HA/PLGA composites containing more than 3 wt% g-n-HA was basically accord with the relational expression of T_(110) c>T_(105)c>T_(115)c>T_(120)c. Moreover, at the same Tc, crystallization rate was greatly enhanced with the increasing of g-n-HA acting as nucleate. However, the addition of higher content of g-n-HA would cause more agglomeration in PLGA matrix, so that the mechanical properties of g-n-HA/PLGA composites would gradually decrease. In conclusion, the addition of higher content of g-n-HA was favorable to promote the crystallization better in g-n-HA/PLGA composites, but it could also cause more agglomeration in PLGA matrix, result in worse mechanical properties, and the addition content of 3 wt% g-n-HA to PLGA matrix was an appropriate proportion, which had the highest bending strength among these g-n-HA/PLGA composites, and it might be potential to be used in biomedical fields in future.
机译：表面改性的g-n-HA分别为1％，3％的一系列g-n-HA / PLGA复合材料。通过溶液混合制备了6重量％，10重量％和15重量％。用差示扫描量热仪（DSC），扫描电子显微镜（SEM）和机电通用测试仪研究了g-n-HA / PLGA复合材料的等温结晶，形貌和力学性能。结果表明，Avrami方程适用于描述该系统的等温结晶过程，其中gn-HA含量大于3 wt％的gn-HA / PLGA复合材料的结晶速率基本符合T_（110）的关系式。 c> T_（105）c> T_（115）c> T_（120）c。而且，在相同的Tc下，随着g-n-HA作为核的增加，结晶速率大大提高。然而，添加更高含量的g-n-HA会导致PLGA基体中更多的团聚，从而使g-n-HA / PLGA复合材料的力学性能逐渐降低。总之，添加较高含量的gn-HA有利于更好地促进gn-HA / PLGA复合材料的结晶，但也可能导致PLGA基体中发生更多的团聚，导致较差的机械性能，且3的添加量gn-HA与PLGA基质的重量百分比合适，在这些gn-HA / PLGA复合材料中具有最高的弯曲强度，并且有可能在未来的生物医学领域中使用。

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  • 来源
    《Materials Research Bulletin》 |2013年第3期|1233-1238|共6页
  • 作者

    Jiang Liuyun; Xiong Chengdong; Jiang Lixin; Chen Dongliang; Li Qing;

  • 作者单位

    Chengdu Institute of Organic Chemistry. Chinese Academy of Sciences. Chengdu 610041. PR China;

    Chengdu Institute of Organic Chemistry. Chinese Academy of Sciences. Chengdu 610041. PR China;

    Chengdu Institute of Organic Chemistry. Chinese Academy of Sciences. Chengdu 610041. PR China,Graduated School of Chinese Academy of Sciences, Beijing 100039, PR China;

    Chengdu Institute of Organic Chemistry. Chinese Academy of Sciences. Chengdu 610041. PR China;

    Chengdu Institute of Organic Chemistry. Chinese Academy of Sciences. Chengdu 610041. PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A. Composites; A. Polymers; C. Differential scanning calorimetry (DSC); D. Mechanical properties;

    机译：A.复合材料;A.聚合物;C.差示扫描量热法（DSC）;D.机械性能;

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