Melt extrusion of polyethylene nanocomposites reinforced with nanofibrillated cellulose from cotton and wood sources
Melt extrusion of polyethylene nanocomposites reinforced with nanofibrillated cellulose from cotton and wood sources
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DOI：
10.1002/app.41857
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发表时间：
2015-05-05
影响因子：
3
通讯作者：
Jur, Jesse S.
中科院分区：
文献类型：
--
作者：
Farahbakhsh, Nasim;Roodposhti, Peiman Shahbeigi;Jur, Jesse S.
在可持续材料加工中，用环境影响小、安全风险低的可生物降解材料代替石油基材料变得越来越重要。本研究的目的是利用微研磨技术从回收的废棉 T 恤中生产均匀的纳米原纤化棉，并比较其作为热塑性聚合物结构中的增强剂与木质材料的性能。通过透射电子显微镜（TEM）、扫描电子显微镜（SEM）、X射线衍射（XRD）和热重分析（TGA）评估微研磨过程对材料形貌、结晶度和热稳定性的影响。纳米原纤化棉比原纤化漂白和未漂白软木具有更高的结晶度和热稳定性。所有材料均与低密度聚乙烯一起挤压以制造纳米复合材料薄膜。纳米原纤化棉纳米复合材料比木质复合材料具有更高的光学透明度。纳米原纤化棉纳米复合材料的机械性能得到了很大改善，并且与含有纳米原纤化的木基复合材料相比，强度提高了 62.5%，这与纳米棉衍生填充材料的较高结晶度相一致。 (c) 2015 年 Wiley periodicals, Inc. J. Appl。聚合物。科学。 2015, 132, 41857。
Replacing petroleum-based materials with biodegradable materials that offer low environmental impact and safety risk is of increasing importance in sustainable materials processing. The objective of this study was to produce uniform nanofibrillated cotton from recycled waste cotton T-shirts using microgrinding techniques and compare its performance as reinforcing agent in thermoplastic polymers constructs with wood-originated materials. The effect of the microgrinding process on morphology, crystallinity, and thermal stability of materials was evaluated by transmission electron microscopy (TEM), scanning electron microscope (SEM), X-ray diffraction (XRD), and thermogravimetry analysis (TGA). Nanofibrillated cotton resulted in higher crystallinity and thermal stability than fibrillated bleached and unbleached softwood. All the materials were extruded with low-density polyethylene to fabricate nanocomposite films. Nanofibrillated cotton nanocomposites had a higher optical transparency than did the wood-based composites. The mechanical properties of the nanofibrillated cotton nanocomposites were largely improved and showed 62.5% increase in strength over the wood-based nanofibrillated containing composites, in agreement with the higher crystallinity of the nanosized cotton-derived filler material. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41857.