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Development of new macro-micro hybrid porous carbon materials with woodceramics

木陶瓷新型宏微杂化多孔碳材料的开发

基本信息

批准号：
16360349
负责人：
MIKI Masamichi
金额：
$ 8.9万
依托单位：
University of Hyogo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16360349/
关键词：
woodceramics charcoal porous material micro pore structure specific surface area X-ray diffraction electrical resistivity density 細孔径分布走査電子顕微鏡

项目摘要

Woodceramics (WCS) are new porous carbon materials which were developed for the purpose of the effective use of waste wood. Corresponding to the kind and shape of starting wood materials such as medium density fiber board (MDF) and wood powder, the following two methods are usually used for preparing the WCS. In the first method, the WCS are prepared by carbonizing the MDF impregnated with liquid phenolic resin. In this method, the impregnated phenolic resin changes into hard glassy carbon during carbonizing process and reinforces the soft charcoal which originated from wood fibers in the MDF. In the second method, the WCS are prepared by carbonizing the compacted mixtures of wood powder and phenolic resin powder. Therefore, WCS are composite materials with hard glassy carbon containing a lot of micro pores originated from phenolic resin and soft charcoal containing many macro pores originated from wood fibers.In this study, in order to use these MDF- and powder-method WCS as the adsor … More bents for harmful gasses and humid (vapors), the effects of carbonization temperature, phenolic resin content and the kind of original wood on the specific surface area were examined by BET method. The results obtained are as follows :(1)The specimens prepared by the powder-method showed larger specific surface area than the specimen prepared by MDF-method, namely 380m^2・g^<-1> in the powder-method specimen containing 30% phenolic resin carbonized at 700℃ and 280m^2・g^<-1> in the MDF-specimen containing 30% phenolic resin, respectively.(2)The power-method specimen containing larger amount of phenolic resin showed larger specific surface area, namely 450m^2・g^<-1> in the specimen containing 70% phenolic resin carbonized at 700℃, 380m^2・g^<-1> in the specimen containing 30% phenolic resin and 230m^2・g^<-1> in the specimen containing 10% phenolic resin, respectively.(3)The softwoods with low bulk density showed larger specific surface area than the hardwood with high bulk density, namely the specific surface areas of softwood (Matsu and Sugi in Japanese) were 450-400m^2・g^<-1> carbonized at 800℃ and that of the hardwood (Ubame-Gashi in Japanese) was 330m^2・g^<-1>, respectively.(4)Therefore, the combination of softwood powder and phenolic resin powder in the powder-method will give the largest specific surface area on carbonization at 800℃. Less

木陶瓷（WCS）是为了有效利用废木材而开发的新型多孔碳材料。根据中密度纤维板(MDF)和木粉等起始木质材料的种类和形状，通常采用以下两种方法来制备WCS。在第一种方法中，WCS是通过碳化浸渍有液体酚醛树脂的MDF来制备的。在该方法中，浸渍的酚醛树脂在碳化过程中转变为硬质玻璃碳，并增强了源自中密度纤维板中木纤维的软木炭。在第二种方法中，WCS是通过碳化木粉和酚醛树脂粉末的压实混合物来制备的。因此，WCS是由含有大量源自酚醛树脂的微孔的硬质玻璃碳和含有源自木纤维的大量宏观孔隙的软木炭组成的复合材料。在本研究中，为了使用这些中密度纤维板和粉末法WCS作为有害气体和湿气（蒸汽）的吸附剂，研究了碳化温度、酚醛树脂含量和原木种类对具体效果的影响。通过BET方法检查表面积。结果表明:(1)粉末法制备的试件比MDF法制备的试件具有更大的比表面积,即700℃炭化30%酚醛树脂的粉末法试件比表面积为380m^2·g^<-1>,含30%酚醛树脂的MDF试件比表面积为280m^2·g^<-1>。 (2)酚醛树脂含量较多的粉末法试件表现出较大的比表面积，700℃碳化70%酚醛树脂试件比表面积为450m^2·g^<-1>，30%酚醛树脂试件比表面积为380m^2·g^<-1>，10%酚醛树脂碳化试件比表面积为230m^2·g^<-1>。 (3)低容重的软木比高容重的硬木表现出更大的比表面积，即在800℃碳化时软木(日本的Matsu和Sugi)的比表面积为450-400m^2·g^<-1>，硬木(日本的Ubame-Gashi)的比表面积为330m^2·g^<-1>， (4)因此，粉末法中针叶木粉和酚醛树脂粉的组合在800℃炭化时会得到最大的比表面积。较少的