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首页> 外文期刊>Applied Engineering in Agriculture >Fineness of hemp (Cannabis sativa L.) fiber bundle after post-decortication processing using a planetary ball mill.
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Fineness of hemp (Cannabis sativa L.) fiber bundle after post-decortication processing using a planetary ball mill.

机译：使用行星式球磨机进行脱皮后处理后的大麻纤维束的细度。

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摘要

Hemp (Cannabis sativa L.) fiber can be used for biocomposites, textile, and many other applications. However, hemp fibers directly from decortication process are often too coarse for most applications. In this study, post decortication processing of hemp coarse fibers was investigated to mainly improve the fiber fineness. A lab-scale planetary ball mill was used to refine coarse hemp fibers collected from decortication plans. The coarse fibers were ground using the planetary ball mill under different grinding speeds (100, 200, 300, 400, 500, and 600 rpm) and grinding durations (2, 5, and 8 min). The refined fibers (longer than 20 mm or 0.79 in.) were characterized by the mass fraction, length, and fineness. The shorter fibers were disposed as chaff after grinding. The results showed that grinding resulted in fiber fraction in the range of 0.69 to 0.96, (i.e. the chaff fraction range being 0.31 to 0.04). Grinding slightly shortened the fiber length, but significantly improved the fiber fineness. In general, higher grinding speed and longer grinding duration produced less, shorter, and finer fiber. To evaluate the performance of the planetary ball mill, reduction of fiber fineness relative to the original fineness was determined from the fiber fineness data before and after grinding, and grinding index was also defined as the ratio of the mass fraction of refined fiber to its fineness. The results of these two parameters indicated that the grinding process was more effective in dealing with a coarser feedstock fiber. The grinding speed of 300 to 600 rpm appeared to be the suitable operational speeds of the mill for post-decortication processing of hemp fiber.
机译：大麻（大麻）纤维可用于生物复合材料，纺织品和许多其他应用。但是，对于大多数应用而言，直接来自脱皮工艺的大麻纤维通常过于粗糙。在这项研究中，对大麻粗纤维的脱皮后处理进行了研究，以主要改善纤维的细度。实验室规模的行星式球磨机用于提纯从脱皮计划中收集的粗麻纤维。使用行星式球磨机以不同的研磨速度（100、200、300、400、500和600 rpm）和研磨时间（2、5和8分钟）研磨粗纤维。精制纤维（长于20毫米或0.79英寸）的特征在于质量分数，长度和细度。较短的纤维在磨碎后作为谷壳布置。结果表明，研磨导致纤维分数在0.69至0.96的范围内（即谷壳分数在0.31至0.04的范围内）。研磨略微缩短了纤维长度，但显着提高了纤维细度。通常，较高的研磨速度和较长的研磨时间会产生较少，较短和较细的纤维。为了评估行星式球磨机的性能，根据研磨前后的纤维细度数据确定纤维细度相对于原始细度的降低，并且研磨指数也定义为精制纤维的质量分数与其细度的比率。 。这两个参数的结果表明，在处理较粗的原料纤维时，研磨过程更有效。 300到600 rpm的磨削速度似乎是该磨机对大麻纤维进行脱皮后处理的合适操作速度。

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