Deposition of additives onto surface of carbon materials by blending method -: general conception
Deposition of additives onto surface of carbon materials by blending method -: general conception
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DOI：
10.1016/j.matchemphys.2005.01.010
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发表时间：
2005-07-15
影响因子：
4.6
通讯作者：
Przepiórski, J
中科院分区：
文献类型：
--
作者：
Przepiórski, J
采用共混法制备了负载金属铜和碳酸钾的碳纤维。将各向同性煤沥青原料与KOH或CuBr 2共混，并对所得混合物进行纺丝。采用这种方法纺出了钾、铜分布均匀的KOH和铜盐共混纤维。将原纤维暴露于用CO2和空气的混合物或仅通过加热至330摄氏度的空气的稳定化，然后在更高温度下用二氧化碳或氢气处理。电子探针显微分析（EPMA）分析表明，碳酸钾或金属铜主要存在于所获得的纤维的周边区域。基于钾和铜在碳体上的扩散机理，提出了在碳材料表面沉积添加剂的一般方法。(c)2005 Elsevier B.V.保留所有权利。
Carbon fibers loaded with potassium carbonate and with metallic copper were prepared by applying a blending method. Raw isotropic coal pitch was blended with KOH or CuBr2 and obtained mixtures were subjected to spinning. In this way KOH and copper salt-blended fiber with uniform distribution of potassium and copper were spun. The raw fibers were exposed to stabilization with a mixture Of CO2 and air or air only through heating to 330 degrees C and next to treatment with carbon dioxide or hydrogen at higher temperatures. Electron probe micro-analysis (EPMA) analyses showed presence of potassium carbonate or metallic copper predominantly in peripheral regions of the obtained fibers. Basing on the mechanisms of potassium and copper diffusion over the carbon volume, generalized method for the deposition of additives onto surface of carbon materials is proposed. (c) 2005 Elsevier B.V. All rights reserved.