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Influence of alkaline treatment on hemp fibers filled poly(lactic acid)

机译：碱性处理对填充聚（乳酸）的HEMP纤维

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Sustainable composite materials can be produced by a combination of natural fibers and biodegradable polymers. In this study hemp fibers reinforced polylactic acid (PLA) has been produced by compounding extrusion. The morphology of hemp fibers has been chemically modified through alkaline treatment with the aim of obtaining better mechanical properties. This treatment is known to remove waxes and non-cellulosic surface components. Scanning Electron Microscopy (SEM), thermo gravimetric analysis (TGA) and tensile tests have been carried out to evaluate the mechanism of action of the alkaline treatment and the influence of this treatment on the fibers and composite properties. SEM evaluations and measurements have shown that the treatment improves the mechanical properties of the composite significantly. This result can be justified by the opening of the fibril clusters that produces a reduction of the average diameter of the fibers and a better dispersion within the polymer matrix.
机译：可持续复合材料可以通过天然纤维和可生物降解的聚合物的组合来制备。在该研究中，通过配混挤出制备了HEMP纤维增强聚乳酸（PLA）。通过碱性处理已经通过碱性处理来进行化学改性，目的是获得更好的机械性能。已知该处理除去蜡和非纤维素表面组分。已经进行了扫描电子显微镜（SEM），热重量分析（TGA）和拉伸试验，以评估碱性处理的作用机理及其对纤维和复合性能的影响。 SEM评价和测量表明，该处理显着改善了复合材料的机械性能。该结果可以通过打开产生纤维的平均直径的纤维簇以及聚合物基质内更好的分散体的原纤簇。

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