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首页> 外文期刊>Wood and Fiber Science >Microstructure and properties of liquefied wood-based activated carbon fibers prepared from precursors and carbon fibers.
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Microstructure and properties of liquefied wood-based activated carbon fibers prepared from precursors and carbon fibers.

机译：由前体和碳纤维制备的液化木基活性炭纤维的微观结构和性能。

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摘要

Liquefied wood-based activated carbon fibers (LWACF) were prepared from liquefied wood-based precursors (LWP) and liquefied wood-based carbon fibers. Microstructure and properties of LWACF were studied using analysis of X-ray diffraction, nitrogen adsorption-desorption isotherms, X-ray photoelectron spectroscopy, and a microtensile tester. It was found that LWACF prepared from LWP (LWACF1) could form a larger crystal size and denser graphite-like structure than those prepared from LWCF (LWACF2). However, for LWACF2, micropores were more numerous and average micropore width was larger, leading to the conclusion that LWACF2 had smaller diameter and lower mechanical properties than LWACF1 and that the burn-off value of LWACF2 was larger than that of LWACF1. Furthermore, excess amounts of element carbon (C) and C bonded to oxygen-containing functions were found on the surface of LWACF2. In conclusion, postcarbonization could damage the graphite-like structure, resulting in expanded micropores and impaired mechanical properties. Postcarbonization brought about an increase in the amount of element C and in the relative content of C bonded to oxygen-containing functions.
机译：液化木基活性炭纤维（LWACF）由液化木基前体（LWP）和液化木基碳纤维制成。通过分析X射线衍射，氮吸附-解吸等温线，X射线光电子能谱和微拉伸试验机，研究了LWACF的微观结构和性能。发现由LWP（LWACF1）制备的LWACF比由LWCF（LWACF2）制备的LWACF可形成更大的晶体尺寸和更致密的石墨状结构。然而，对于LWACF2，微孔数量更多，平均微孔宽度更大，从而得出的结论是LWACF2的直径较小，机械性能比LWACF1低，并且LWACF2的燃尽值大于LWACF1。此外，在LWACF2的表面上发现了过量的与含氧官能团键合的元素碳（C）和C。总之，后碳化会破坏类石墨结构，导致微孔扩大和机械性能受损。后碳化使元素C的量和与含氧官能团键合的C的相对含量增加。

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