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Polyaniline coated curaua fibres in polyamide-6 composites: the effect of fibre surface modification on the crystallographic properties

机译：聚酰胺6复合材料中聚苯胺包覆的姜黄纤维：纤维表面改性对晶体学性能的影响

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摘要

Composites have the ability to combine the individual properties of constitutive components, generating a unique material with properties suitable for a particular purpose. This study aims to develop a polymeric reinforced composite material, which is antistatic and light. Polyaniline (PAni) is one of the most studied conductive polymers due to its ability to exist in a large number of intrinsic redox states. The possibility of carrying out PAni synthesis on vegetable fibres and incorporating this in polymeric matrices, such as polyamide-6, enables the production of antistatic reinforced materials. In this work, curaua fibres were chemically treated with polyaniline doped with p-toluene sulfonic acid and processed with polyamide-6 in a twin-screw co-rotating and interpenetrating extruder. The microstructures of the neat curaua fibres and polyaniline coated curaua fibres were characterized by X-ray diffraction (XRD) measurements. Scanning electron microscopy was employed to observe the distribution and morphology of the PAni nanoparticles. The oxidation states of PAni were evaluated by X-ray photoelectron spectroscopy. X-ray diffraction combined with microscopy analyses of PAni synthesized without a substrate, showed crystalline components embedded into amorphous regions in the sample, while the PAni synthesized on the fibres showed a lower degree of crystallinity. The XPS analysis shows that the PAni synthesized on the fibres is in the emeraldine salt form.
机译：复合材料具有组合组成成分的各个属性的能力，可以生成具有适合特定目的的属性的独特材料。这项研究的目的是开发一种抗静电和轻质的聚合物增强复合材料。聚苯胺（PAni）是研究最多的导电聚合物之一，因为它能够以多种固有的氧化还原态存在。在植物纤维上进行PAni合成并将其掺入聚合物基体（如聚酰胺6）的可能性使抗静电增强材料的生产成为可能。在这项工作中，姜黄素纤维用掺有对甲苯磺酸的聚苯胺化学处理，并在双螺杆同向旋转和互穿挤出机中用聚酰胺6加工。通过X射线衍射（XRD）测量来表征纯净的姜汁纤维和聚苯胺涂覆的姜汁纤维的微观结构。使用扫描电子显微镜观察PANi纳米颗粒的分布和形态。通过X射线光电子能谱评价PAni的氧化态。 X射线衍射结合显微镜分析无底物合成的PAni，表明晶体组分嵌入样品中的非晶区，而在纤维上合成的PAni显示出较低的结晶度。 XPS分析表明，在纤维上合成的PAni为翡翠盐形式。

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