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首页> 外文期刊>CERAMICS INTERNATIONAL >An in situ hydrothermal fabrication process of poly (vinyl alcohol)/apatite-like nanocomposites with improved thermal and mechanical properties
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An in situ hydrothermal fabrication process of poly (vinyl alcohol)/apatite-like nanocomposites with improved thermal and mechanical properties

机译：具有改善的热和机械性能的聚乙烯醇/磷灰石样纳米复合材料的原位水热制备工艺

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摘要

In this communication, a novel poly(vinyl alcohol) (PVA)/apatite-like nanocomposite films were successfully synthesized using an in situ hydrothermal process at low temperatures and a solution casting method for a facile and effective fabrication process. One step in situ process, comprising nucleation and precipitation of apatite-like nanoparticles in the presence of PVA molecules of obtained PVA/apatite-like nanocomposites. The morphological, structural, thermal, and mechanical properties of the nanocomposites were studied. The morphological analysis confirmed that this process produced amorphous apatite-like nanoparticles in the PVA solution that were homogenously distributed with controlled particle sizes of less than 20 nm in diameter. The incorporation of low quantities of apatite-like nanoparticles into the PVA matrix could significantly improve the mechanical strength of the resultant biocomposite film, which suggests an excellent load transfer between the apatite and the PVA matrix. This improvement in mechanical strength is due to the effective bonding of the filler nanoparticles in the PVA matrix during the hydrothermal reaction, which is supported by the FTIR and TGA/DSC data. This proposed process offers the possibility of using these synthesized nanocomposite materials in biomedical applications.
机译：在这种交流中，使用低温原位水热工艺和溶液浇铸方法成功地合成了新型聚乙烯醇（PVA）/磷灰石样纳米复合膜，从而实现了简便有效的制造工艺。原位过程的一个步骤，包括在获得的PVA /磷灰石样纳米复合材料的PVA分子存在下，磷灰石样纳米颗粒的形核和沉淀。研究了纳米复合材料的形态，结构，热和机械性能。形态分析证实，该过程在PVA溶液中产生了无定形的磷灰石状纳米颗粒，它们均匀地分布，直径的控制粒径小于20nm。将少量磷灰石状纳米颗粒掺入PVA基质中可以显着提高所得生物复合膜的机械强度，这表明磷灰石与PVA基质之间的负载转移非常好。机械强度的这种提高是由于在水热反应过程中填料纳米粒子在PVA基质中的有效结合，这得到FTIR和TGA / DSC数据的支持。该提出的方法提供了在生物医学应用中使用这些合成的纳米复合材料的可能性。

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