Carbodeon develops NanoDiamond composite thermally conductive thermoplastics with 20%-100% improvement in thermal conductivity. New materials and processes reduce NanoDiamond costs by up to 70%.
July, 10, 2014
Carbodeon's uDiamond® nanodiamond materials can now achieve a 20 percent increase in polymer thermal performance by using as little as 0.03 wt.% nanodiamond material at 45 percent thermal filler loading, enabling the further performance at a lower cost than made with traditional fillers. Samples were manufactured at VTT Technical Research Centre of Finland and their thermal performance was analyzed by ESK (3M) in Germany.
Last October, Carbodeon published its data on thermal fillers showing that the conductivity of polyamide 66 (PA66) based thermal compound could be increased by 25 percent by replacing 0.1 wt.% of the typically maximum effective level of boron nitride filler (45 wt.%) with the company’s application fine-tuned nanodiamond material. The latest refinements in nanodiamond materials and compound manufacturing allow similar performance improvements with 70 percent less nanodiamond consumption and thus, greatly reduced cost. The performance improvements achieved are derived from the extremely high thermal conductivity of diamond, our ability to optimise the nanodiamond filler affinity to applied polymers and other thermal fillers and finally, from Carbodeon’s improvements in nanodiamond filler agglomeration control.
With the ability to control all these parameters, the nanotechnology key paradigm of “less gives more” can truly be realised. The active surface chemistry inherent in detonation-synthesised nanodiamonds has historically presented difficulties in utilising the potential benefits of the 4-6nm particles, making them prone to agglomeration. Carbodeon optimises this surface chemistry so that the particles are driven to disperse and to become consistently integrated throughout parent materials, especially polymers. The much-promised properties of diamond can thus be imparted to other materials with very low, and hence economic, concentrations.
For more demanding requirements, conductivity increases of as much as 100 percent can be achieved using 1.5 percent nanodiamond materials at 20 percent thermal filler loadings. “This increase in thermal conductivity is achieved without affecting the electrical insulation or other mechanical properties of the material and with low tool wear, making it an ideal choice for a wide range of electronics and LED applications,” said Carbodeon CTO Vesa Myllymäki.
“We know we have not yet uncovered all the benefits that Carbodeon nanodiamonds can deliver and continue our focused application development on both polymer thermal compounds, and on metal finishing and industrial polymer coatings,” Vesa Myllymäki added. “Recently we were granted a patent on nanodiamond-containing thermoplastic thermal composites and we see great future opportunities for these materials. ”It has been shown in numerous applications that use of our nanodiamond additives in their mono-functionalized form shows improved end product mechanical and other properties, significantly reduced nano-additive consumption and thus, cost.
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uDiamond® is the brand name of nanodiamond materials produced by Carbodeon Ltd Oy.