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首页> 外文期刊>Cellulose >Grinding process for the production of nanofibrillated cellulose based on unbleached and bleached bamboo organosolv pulp
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Grinding process for the production of nanofibrillated cellulose based on unbleached and bleached bamboo organosolv pulp

机译：基于未漂白和漂白的竹有机溶剂浆生产纳米原纤化纤维素的研磨工艺

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Nanofibrillated cellulose (NFC) is a type of nanomaterial based on renewable resources and produced by mechanical disintegration without chemicals. NFC is a potential reinforcing material with a high surface area and high aspect ratio, both of which increase reinforcement on the nanoscale. The raw materials used were unbleached and bleached bamboo organosolv pulp. Organosolv pulping is a cleaner process than other industrial methods (i.e. Kraft process), as it uses organic solvents during cooking and provides easy solvent recovery at the end of the process. The NFC was produced by treating unbleached and bleached bamboo organosolv pulps for 5, 10, 15 and 20 nanofibrillation cycles using the grinding method. Chemical, physical and mechanical tests were performed to determine the optimal condition for nanofibrillation. The delamination of the S2 layer of the fibers during nanofibrillation contributed to the partial removal of amorphous components (mainly lignin), which have low polarity and improved the adhesion of the fibers, particularly the unbleached cellulose. The transverse modulus of elasticity of the unbleached NFC was highest after 10 nanofibrillation cycles. Further treatment cycles decreased the modulus due to the mechanical degradation of the fibers. The unbleached NFC produced by 10 cycles have a greater transverse modulus of elasticity, the crystallite size showed increase with the nanofibrillation, and after 5 nanofibrillation cycles, no differences are observed in the morphology of the fibers.
机译：纳米原纤化纤维素（NFC）是一种基于可再生资源的纳米材料，它是通过机械分解而无化学物质生产的。 NFC是具有高表面积和高长宽比的潜在增强材料，两者都可以增强纳米级的增强作用。所使用的原料为未漂白的和漂白的竹有机溶剂浆。有机溶剂制浆比其他工业方法（即硫酸盐法）更清洁，因为它在蒸煮过程中使用有机溶剂，并且在过程结束时易于回收溶剂。通过使用研磨方法将未漂白和漂白的竹有机溶剂浆处理5、10、15和20个纳米原纤化循环来生产NFC。进行了化学，物理和机械测试，以确定纳米原纤化的最佳条件。纳米原纤化过程中纤维S2层的分层有助于部分去除无定形组分（主要是木质素），该组分具有低极性并改善了纤维特别是未漂白纤维素的粘合力。经过10次纳米原纤化循环后，未漂白NFC的横向弹性模量最高。由于纤维的机械降解，进一步的处理循环降低了模量。 10次​​循环产生的未漂白NFC具有较大的横向弹性模量，微晶尺寸显示出随纳米原纤化而增加，并且在5次纳米原纤化循环后，未观察到纤维形态的差异。

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