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首页> 外文期刊>Journal of Polymers and the Environment >Synthesis and Properties of Biodegradable Poly(vinyl alcohol)/ Organo-nanoclay Bionanocomposites
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Synthesis and Properties of Biodegradable Poly(vinyl alcohol)/ Organo-nanoclay Bionanocomposites

机译：可生物降解的聚乙烯醇/有机纳米粘土生物纳米复合材料的合成与性能

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摘要

Biodegradable nanocomposites comprising of biodegradable polymers and bioactive organically modified layered silicates commonly reveal extremely enhanced mechanical and various other properties when compared to those of virgin polymers. This work was undertaken with a view to preparation of polymer bionanocomposites consisting of biodegradable poly(vinyl alcohol) (PVA) and organo-nanoclay. Cloisite Na~+ and ammonium salt of L-isoleucine amino acid was used for the preparation of the novel chiral organo-nanoclay via an intercalation reaction in an aqueous solution. PVA/organo-nanoclay bionanocomposites of various compositions were created through the solution intercalation method by ultrasound-assisted technique. The resulting novel materials were characterized by X-ray diffraction and Fourier transform infrared spectroscopy techniques. Thermogravimetric analysis (TGA) and UV/vis spectroscopy were applied to test the properties of PVA bionanocomposites. TGA indicate that the thermal stability is enhanced distinctly, without a sacrifice in optical clarity. The improvement of thermal properties was attributed to the homogeneous and good dispersion of organo-nanoclay in polymeric matrix and the strong hydrogen bonding between O-H groups of PVA and the oxygen atoms of silicate layers or carbonyl group as well as OH group of intercalated amino acid. The morphology of the organo-nanoclay and PVA bionanocomposites was examined by scanning electron microscopy and transmission electron microscopy techniques. Uniform distribution of clay due to intimate interaction between clay and polymer appears to be the cause for improved properties.
机译：与原始聚合物相比，由生物可降解聚合物和生物活性有机改性的层状硅酸盐组成的生物可降解纳米复合材料通常具有极高的机械性能和其他各种性能。进行这项工作是为了制备由可生物降解的聚乙烯醇（PVA）和有机纳米粘土组成的聚合物纳米复合材料。通过在水溶液中的插层反应，使用Clositei Na +和L-异亮氨酸氨基酸的铵盐制备新型手性有机纳米粘土。通过超声辅助溶液插层法制备了各种组成的PVA /有机纳米粘土仿生复合材料。通过X射线衍射和傅里叶变换红外光谱技术表征所得的新型材料。应用热重分析（TGA）和紫外/可见光谱法测试PVA纳米复合材料的性能。 TGA表明热稳定性得到明显提高，而没有牺牲光学清晰度。热性能的改善归因于有机纳米粘土在聚合物基质中的均匀和良好的分散性，以及PVA的O-H基团与硅酸盐层的氧原子或羰基基团以及插入氨基酸的OH基团之间的强氢键。通过扫描电子显微镜和透射电子显微镜技术检查了有机纳米粘土和PVA纳米复合材料的形态。由于粘土和聚合物之间的紧密相互作用而导致的粘土均匀分布似乎是改善性能的原因。

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