公开(公告)号：KR1020070111654A

公开(公告)日：2007-11-22

申请号：KR1020060044726

申请日：2006-05-18

Applicant: 고려대학교 산학협력단

Inventor： 임대순 ,  이정엽 ,  임동필

IPC: B82B3/00 ,  B82Y40/00

CPC classification number: C01B32/05 ,  B01F3/00

Abstract: A method for preparing a dispersion of onion-like carbon particles is provided to obtain an aqueous solution of onion-like carbon particles having excellent mechanical properties such as lubricating property and a fine particle size and showing excellent dispersibility sufficient for preventing secondary agglomeration. A method for preparing a dispersion of onion-like carbon particles comprises: a step(S1) of heating diamond nanoparticles under an inert gas atmosphere to provide onion-like carbon particles containing primary crystals having a size of 4-10nm; a step(S2) of adding dropwise 0.2-10 wt of the onion-like carbon particles and 0.2-5 wt% of an anionic dispersant to distilled water, and further adding a base reagent to form a mixed solution maintaining a pH of 8.5 or higher; a step(S3) of introducing the mixed solution into a sealed agitator in an amount of 30-50 vol% based on the total volume of the agitator along with 40-70 vol% of agitation particles; and a step(S4) of separating the agitation particles from the mixed solution to obtain a mixed solution in which the onion-like carbon particles are dispersed. The anionic dispersant is selected from a group consisting of sodium dodecylsulfonate, calcium dodecylsulfonate, polyacrylic acid, 1,2,3,4-butanetetracarboxylic acid.

Abstract translation: 提供了制备洋葱状碳颗粒分散体的方法，以获得具有优异的机械性能如润滑性能和细粒度的洋葱状碳颗粒水溶液，并显示出足以防止二次凝聚的优异分散性。 制备洋葱状碳颗粒分散体的方法包括：在惰性气体气氛下加热金刚石纳米颗粒以提供含有4-10nm尺寸的初晶的洋葱状碳颗粒的步骤（S1）; 向蒸馏水中滴加0.2-10重量的洋葱状碳粒子和0.2〜5重量％的阴离子性分散剂的步骤（S2），进一步添加碱试剂以形成维持pH为8.5的混合溶液或 更高; 基于搅拌器的总体积和40-70体积％的搅拌颗粒，将混合溶液以30-50体积％的量引入密封搅拌器的步骤（S3） 以及从混合溶液中分离搅拌粒子的步骤（S4），得到分散有洋葱状碳粒子的混合溶液。 阴离子分散剂选自十二烷基磺酸钠，十二烷基磺酸钙，聚丙烯酸，1,2,3,4-丁烷四羧酸。