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，对应于中密度纤维板（MDF）和木粉等木质原料的种类和形状，有以下两种方法。通常用于制备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。第二种方法是通过碳化木粉和酚醛树脂粉末的混合物来制备WCS，因此，WCS是含有大量硬质玻璃碳的复合材料。微孔源自酚醛树脂和软木炭，含有许多源自木纤维的大孔。在这项研究中，为了使用这些 MDF 和粉末法 WCS 作为吸附剂… 更多采用BET法考察了有害气体和潮湿（蒸气）的影响，炭化温度、酚醛树脂含量和原木种类对比表面积的影响，得到的结果如下：（1）制备的试件。粉末法制备的样品比MDF法制备的样品显示出更大的比表面积，即含有30%酚醛树脂的粉末法样品在200℃碳化后的比表面积为380m^2·g^<-1>含30%酚醛树脂的MDF试件分别为700℃和280m^2·g^<-1>。(2)含较多酚醛树脂的粉末法试件表现出较大的比表面积，为450m^2・g^<-1>在700℃碳化70%酚醛树脂的样品中，380m^2・g^<-1>在含有700℃碳化的样品中含10%酚醛树脂的试件中分别为30%酚醛树脂和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，即软木（日语中的松和杉）的比表面积在 800℃ 下碳化为 450-400m^2・g^<-1>，硬木的比表面积为 450-400m^2・g^<-1> （日语中的 Ubame-Gashi）分别为 330m^2・g^<-1>。(4)因此，粉末法中软木粉末和酚醛树脂粉末的组合将在碳化时产生最大的比表面积。 800℃以下