Development of New Carbons Using Liquid Phase Chemical Treatment and Their Properties

液相化学处理新型碳的开发及其性能

基本信息

批准号：
13650735
负责人：
GHIOYA Masatoshi
金额：
$ 2.43万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

项目摘要

A liquid phase chemical treatment has been used as a part of the production process of carbons from organi compounds aiming at controlling the pore structure of the carbons. Poly (vinylidene fluoride) (PVDF) has bee treated with a strong organic base, and a high-temperature heat treatment and an optional activation treatment using carbon dioxide gas have been applied. Carbons with wide variety of pore size and volume could b successfully obtained by changing the degree of the chemical treatment. From slightly treated PVDF, carbon with lame pore size were obtained. While from intensively treated PVDF, carbons with small pore size an volume were obtained. The pore size in the activated carbon had strong correlation with that in the carbo before activation, and the mesoporous activated carbons were obtained from slightly treated PVDF. For the activated carbon containing the pores with diameters 4-10 nm, the pore volume measured with nitrogen ga adsorption was 1.6 cm^3g^<-1>, BET surface area 2500 m^3g<-1> and methylene blue adsorption from the liquid phas 0.54g, respectively, per l g of the activated carbon. It was made clear that in the present method, the pores ar produced due to the formation. With the chemical treatment, of the inhomogeneous structure in which the thermal decomposition behavior and the volume loss at thermal decomposition vary between regions. For controlling the pore structure of the carbon, another method using polymer blend has been proposed, while the starting polymer suitable for the method has been strictly limited. Since it was made clear with the present study that the pore structure of the carbon can be controlled by utilizing the inhomogeneity of the structure originating form the crystal line and the amorphous regions of the polymer, the range of the choice of the polymers for controlling th pore structure has been enlarged.

液相化学处理已被用作从有机化合物生产碳的过程的一部分，旨在控制碳的孔结构。聚偏氟乙烯 (PVDF) 经过强有机碱处理，并采用高温热处理和可选的二氧化碳活化处理。通过改变化学处理的程度可以成功地获得具有多种孔径和体积的碳。从稍微处理过的 PVDF 中，获得了孔径较小的碳。而经过强化处理的PVDF，则获得了孔径和体积较小的碳。活性炭中的孔径与活化前的炭中的孔径有很强的相关性，并且介孔活性炭是由稍微处理的PVDF获得的。对于孔径为4-10 nm的活性炭，氮气吸附测得的孔体积为1.6 cm^3g^ -1 ，BET表面积为2500 m^3g -1 ，亚甲基蓝吸附为每升活性炭分别含有0.54克液相。清楚的是，在本方法中，由于形成而产生孔。通过化学处理，获得不均匀结构，其中热分解行为和热分解时的体积损失在不同区域中不同。为了控制碳的孔结构，已经提出了另一种使用聚合物共混物的方法，但适用于该方法的起始聚合物受到严格限制。由于本研究清楚地表明，可以通过利用源自聚合物的结晶区和非晶区的结构的不均匀性来控制碳的孔结构，因此用于控制孔结构的聚合物的选择范围孔隙结构有所扩大。