权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Functionalization of Carbonaceous Mesophase Spherules

碳质中间相球粒的功能化

基本信息

批准号：
07650936
负责人：
MIYAKE Mikio
金额：
$ 1.34万
依托单位：
Japan Advanced Institute of Science and Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

项目摘要

The purpose of the research was to develop functional materials based on carbon particles. Following results are obtained by surface modification of carbonaceous mesophase spherules (spherules) as well as carbon blacks (CB), which expose aromatic edges and hexagonal planes to the surface, respectively :1. Surface modification of spherules by the introduction of functional groups(1) Samples after introduction of acidic functional groups by oxidation were subjected to silylation reaction by using RSiCl_3. Original spherules and ones after oxidation were hydrophobic and hydrophilic, respectively. They turned to hydrophobic again after the reaction with RSiCl_3, suggesting introduction of RSi group to the spherule surface. Number of RSi groups introduced estimated by TGA was 10^<18>/m^2. On the other hand, CB sustained hydrophilic even after the reaction with RSiCl_3. Thus, few RSi groups are introduced to CB.(2) Alkylation reaction was carried out by using strong base (n-BuLi/t-BuOK) to a … More bstract aromatic hydrogen followed by alkylation with alkyl iodides. Numbers of alkyl groups introduced to spherules estimated by the change in H/C ratios were much higher than that introduced to CB,although CB had high specific surface area than spherules. Alkylated spherules dispersed in toluene for a long period and may by applicable to conductive paints.2. Surface modification of spherules by the interfacial reactions(1) Pd (NH_3)_4^<2+> was supported on the oxidative spherules followed by electroless Ni plating in basic aqueous solutions containing NiSO_4 and Na_2H_2PO_2. The product was covered with Ni thin film completely and its magnetic moment was as high as half to bulk Ni.(2) The oxidation spherules were treated in stepwise with Na_2OnSiO_2 in aqueous solution, in benzene, and with (NH_4)_2SO_4 in aqueous solution to proceed interfacial reaction by the formation of W/O emulsion. After the reaction, spherules were covered with silica thin film. The silica film was porous and potentially applicable to a support as a catalyst. Less

该研究的目的是开发基于碳颗粒的功能材料。通过对碳质中间相小球（小球）以及炭黑（CB）进行表面改性，分别使芳香边缘和六方平面暴露于表面，获得以下结果：1.通过引入官能团对小球进行表面改性（1）通过氧化引入酸性官能团后的样品用RSiCl_3进行硅烷化反应。原始小球和氧化后的小球分别是疏水和亲水的。在与RSiCl_3反应后，它们又变成疏水的，这表明在小球表面引入了RSi基团。通过TGA估计引入的RSi基团的数目为10^<18>/m^2。另一方面，CB与RSiCl_3反应后仍保持亲水性。因此，很少RSi基团被引入CB。(2)通过使用强碱（n-BuLi/t-BuOK）进行烷基化反应，以得到烷基化产物。 ...更多信息取代芳族氢，然后用烷基碘烷基化。引入到小球的烷基基团的数目估计的H/C比的变化远高于引入到CB，虽然CB具有比小球高的比表面积。烷基化小球在甲苯中长期分散，可用于导电涂料.（1）在含NiSO_4和Na_2H_2PO_2的碱性水溶液中，将Pd（NH_3）_4^<2+>负载在氧化小球上，然后进行化学镀镍。产物表面完全被Ni薄膜覆盖，其磁矩高达体相Ni的一半。(2)氧化小球分别用Na_2OnSiO_2水溶液、苯溶液和（NH_4）_2SO_4水溶液处理，形成W/O乳状液，进行界面反应。反应后，小球被二氧化硅薄膜覆盖。二氧化硅膜是多孔的，并且潜在地适用于作为催化剂的载体。少