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Preparation and properties of poly (lactic acid)/magnetic Fe3O4 composites and nonwovens

机译：聚（乳酸）/磁Fe3O4复合材料和非织造织物的制备及性能

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摘要

To develop degradable and magnetic PLA-based melt-blown (MB) nonwoven materials for air filtration applications, poly (lactic acid) (PLA)/magnetic Fe3O4 (PLA/Fe3O4) MB nonwovens were obtained by melt blowing using the PLA/Fe3O4 composites with different components prepared by melt-mixing as the masterbatch. The crystallization and melting behavior of the composites were examined with differential scanning calorimetry (DSC). Although the results showed that the Fe3O4 particles obviously hindered the cold crystallization process of PLA and the relative crystallinity degree of the composites decreased due to the addition of Fe3O4; there was no overall change in the crystal structure of PLA according to the wide-angle X-ray diffraction (XRD). Thermogravimetric analysis (TGA) and dynamic rheological measurements demonstrated that the introduction of Fe3O4 reduced the thermal stability of PLA. The effect of Fe3O4 particles on the morphology of the PLA/Fe3O4 composites and MB nonwovens was characterized by scanning electron microscopy (SEM). It revealed that the Fe3O4 particles were dispersed in a PLA mixture with the "sea-island" structure, and the addition of Fe3O4 particles also made the fiber surface rough and the nonwoven web turned fluffy to some extent. The magnetic properties and filtration performance of the MB nonwovens were also investigated in detail.
机译：为了开发用于空气过滤应用的可降解和基于磁性PLA的熔喷（MB）非织造材料，通过使用PLA / Fe3O4复合材料熔化通过熔化而获得聚（乳酸）（PLA）/磁Fe3O4（PLA / Fe3O4）MB非织造织物用熔融混合作为母料制备的不同组分。用差示扫描量热法（DSC）检查复合材料的结晶和熔化行为。尽管结果表明，Fe3O4颗粒明显阻碍了PLA的冷结晶过程，并且复合材料的相对结晶度由于添加Fe3O4而降低;根据广角X射线衍射（XRD），PLA的晶体结构没有总体变化。热重分析（TGA）和动态流变测量表明，Fe3O4的引入降低了PLA的热稳定性。 Fe3O4颗粒对PLA / Fe3O4复合材料和MB非织造织物形态的影响，其特征在于扫描电子显微镜（SEM）。揭示了将Fe3O4颗粒与“海岛”结构分散在PLA混合物中，并加入Fe3O4颗粒也使纤维表面粗糙，并且非织造幅在一定程度上转动蓬松。还详细研究了MB非织造织物的磁性和过滤性能。

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  • 来源
    《RSC Advances》 |2017年第66期|共7页
  • 作者

    Yu Bin; Wang Mingjun; Sun Hui; Zhu Feichao; Han Jian; Bhat Gajanan;

  • 作者单位

    Zhejiang Sci Tech Univ Key Lab Ind Text Mat &

    Mfg Technol Hangzhou Zhejiang Peoples R China;

    Zhejiang Sci Tech Univ Key Lab Ind Text Mat &

    Mfg Technol Hangzhou Zhejiang Peoples R China;

    Zhejiang Sci Tech Univ Key Lab Ind Text Mat &

    Mfg Technol Hangzhou Zhejiang Peoples R China;

    Zhejiang Sci Tech Univ Key Lab Ind Text Mat &

    Mfg Technol Hangzhou Zhejiang Peoples R China;

    Zhejiang Sci Tech Univ Key Lab Ind Text Mat &

    Mfg Technol Hangzhou Zhejiang Peoples R China;

    Univ Georgia Dept Text Merchandising &

    Interiors Athens GA 30602 USA;

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  • 正文语种 eng
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