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模拟PFI磨研磨漂白针叶木硫酸盐浆(BSKP)制备直径为1μm的微细纤维的能耗。平均直径为13μm的原纤维经PFI磨处理125000转可制得含有大量直径为1.3μm的微细纤维。据估计,PFI磨将24g原纤维研磨成直径为1.3μm的微细纤维时所需的最低能耗为1875kJ。忽略纤维的弹性形变,假设纤维尺寸的减小遵循Rittinger定律,Rittinger常数为28J.m/kg,估算PFI磨制备24g直径为1μm的微细纤维的能耗为2480kJ,据此推算该种方法制备微细纤维的成本为2.37美元/kg。尽管该种方法制备微细纤维的效率不高,但成本也不是很高,制备的微细纤维可作为一种高效的增强剂。
Energy Consumption of Microfibers with a Diameter of 1 μm Prepared by Simulating PFI Mill Ground bleached softwood kraft pulp (BSKP). Fibrils having an average diameter of 13 m can be produced by a PFI mill 125,000 revolutions to produce a large amount of microfibers having a diameter of 1.3 m. It is estimated that a PFI mill requires a minimum energy consumption of 1,875 kJ for ground 24 g fibrils into microfibers of 1.3 μm diameter. Ignoring the elastic deformation of fibers, suppose the reduction of fiber size follows Rittinger’s law, the Rittinger constant is 28 J · m / kg, and the energy consumption of preparing 24 g of fine fibers with a diameter of 1 μm for PFI grinding is 2480 kJ. The cost of fiber is $ 2.37 / kg. Although this method is not efficient for preparing the fine fibers, the cost is not very high, and the prepared fine fibers can be used as an efficient reinforcing agent.