文献类型：专利

英文题名：Preparation of block carbon nanofiber composite material involves heating, catalysis growth reaction, dipping block carbon nanofiber in phenolic resin-ethanol solution, removing excess solution, drying, and phenolic resin carbonization

作者：QIAO W;WANG Z;WANG S;CHEN Q;ZHAN L;ZHANG R;LIANG X;LING L

机构：[1]UNIV EAST CHINA SCI & TECHNOLOGY;[2]UNIV EAST CHINA SCI&TECHNOLOGY

申请号：CN101289329-A

申请日：2008-05-26

公开日：2008-10-22

语种：英文

收录：DERWENT

摘要：NOVELTY - Preparing block carbon nanofiber composite material comprises (1) heating the catalyst and maintaining in helium airflow with hydrogen, carrying out catalysis growth reaction to obtain block carbon nanofiber; (2) dipping block carbon nanofiber in phenolic resin-ethanol solution, removing excess solution, and drying to obtain composite of block carbon nanofiber and phenolic resin; (3) putting composite of block carbon nanofiber and phenolic resin in carbonized furnace to access nitrogen airflow, heating and maintaining for 3-7 hours, and carrying out the phenolic resin carbonization. USE - The method is useful for preparing block carbon nanofiber composite material (claimed). ADVANTAGE - The method material shows high electricity conductivity and heat conductivity, high mechanical intensity, and low density. DETAILED DESCRIPTION - Preparing block carbon nanofiber composite material comprises (1) putting the catalyst in the die to heat up to 400-700 degrees C and maintaining for 0.5-8 hours in the helium airflow with hydrogen (H2), switching and accessing the carbonaceous gas to carry out catalysis growth reaction of the block carbon nanofiber to obtain block carbon nanofiber; where volume fraction of H2 in the helium airflow with H2 is 5-80%; the carbonaceous gas is H2 and carbon monoxide, methane, ethane, propane, ethylene, and/or propylene gas; the volume fraction of H2 in the carbonaceous gas is 10-90%; the catalyst is copper, nickel, and/or iron metals; (2) dipping the block carbon nanofiber obtained in step (1) in the phenolic resin-ethanol solution for 0.5-24 hours, removing the excess solution, and drying in vacuum at 40-70 degrees C for 12-48 hours to obtain the composite of block carbon nanofiber and phenolic resin; the volume fraction of phenolic resin in the solution is 15-80%; and the mass ratio between block carbon nanofiber and phenolic resin-ethanol solution is 1:5-1:800; (3) putting the composite of block carbon nanofiber and phenolic resin obtained in step (2) in the carbonized furnace to access the nitrogen (N2) airflow and heat up to 700-1100 degrees C and maintaining for 3-7 hours, and carrying out the phenolic resin carbonization to obtain the needed block carbon nanofiber composite material.