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首页> 外文期刊>Journal of Macromolecular Science. Pure and Applied Chemistry >Preparation and characterization of poly vinyl alcohol/poly vinyl pyrrolidone/clay based nanocomposite by gamma irradiation
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Preparation and characterization of poly vinyl alcohol/poly vinyl pyrrolidone/clay based nanocomposite by gamma irradiation

机译：γ射线辐照制备聚乙烯醇/聚乙烯吡咯烷酮/粘土基纳米复合材料及其表征

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摘要

A series of PVA/PVP/clay nanocomposite were prepared by gamma irradiation with different clay contents of (0.15, 0.3, 1, 1.5, 3 and 5wt%). The gelation content and swelling behavior were investigated. The morphology and structure of PVA/PVP/clay nanocomposite and dispersion of the clay nanoparticles in the polymeric matrix were examined by infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The introduction of clay into polymeric matrix was investigated by X-ray diffraction pattern (XRD) and Transmission electron microscope (TEM). It is observed that, the increase of the clay content causes a decrease in the swelling percent. The thermal stability studies confirmed that the introduction of clay lead to an increase in the thermal stability. The TEM results showed that the clay nanoparticles are interchelated or exfoliated in the polymeric matrix. Some desirable characteristics such as relatively good swelling and excellent barrier capability against microbe penetration suggested that PVA/PVP/clay nanocomposite can be a good candidate as a wound dressing.
机译：通过γ射线辐照制备了一系列PVA / PVP /粘土纳米复合材料，其粘土含量分别为（0.15、0.3、1、1.5、3和5wt％）。研究了凝胶含量和溶胀行为。通过红外光谱（FT-IR）和扫描电子显微镜（SEM）检查了PVA / PVP /粘土纳米复合材料的形态和结构以及粘土纳米颗粒在聚合物基质中的分散性。通过X射线衍射图（XRD）和透射电子显微镜（TEM）研究了将粘土引入聚合物基体中的过程。观察到，粘土含量的增加引起溶胀百分比的降低。热稳定性研究证实，粘土的引入导致热稳定性的提高。 TEM结果表明，粘土纳米颗粒在聚合物基体中被螯合或剥落。一些理想的特性，例如相对良好的溶胀和出色的抗微生物渗透能力，表明PVA / PVP /粘土纳米复合材料可作为伤口敷料的良好候选者。

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