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Daicel Industry Talk

Introducing DAICEL's activities related to detonation nanodiamonds, unique surface modification and application development

Hisayoshi Ito, DAICEL Corporation, Japan

Daicel is a Japanese chemical company, which was formed through the merger of eight celluloid producers in 1919. As a part of our effort to create new business domains, we started developing the detonation nanodiamond, and have already established semi-commercial production capacity for the detonation, as well as for purification, of the detonation soot to provide nanodiamonds (ND).

We have been investing our R&D resources mainly on two areas. One is to exploit unique and original functions of the nanodiamonds to develop profitable applications. The other is to create unique and original nanodiamonds themselves to pursue even higher values. In the talk, we will introduce DAICEL’s unique nanodiamonds that we have recently started introducing to markets as well as some of recent topics about commercial applications we’ve been working on.

Unique nanodiamonds

Nanodiamonds can be dispersed very stably in water due to their hydrophilicity and high zeta potential to earn repulsion between the particles. There are single digit nano-dispersions of nanodiamonds in water available in the market including ours. However, as long as one depends on the zeta potential to obtain stable dispersions, it is difficult to achieve the same stability in water-base formulas in which various chemical components coexist especially at high concentration. For instance, in a solution for metal plating, nanodiamonds are no longer able to maintain nano-dispersion due to high ionic strength. DAICEL has a surface modification technology to make nanodiamonds water-soluble, regardless of surrounding conditions such as ionic strength of the solution. In the talk, we will introduce some of its properties and possible applications.

In addition to above, we will show performances of nanodiamonds for commercial applications, such as tribological behaviour in water and as a thermal stabilizer for polymers.