Session: 10-01 Interactive Presentations

Paper Number: 88952

88952 - Evaporative/boiling Wick Cooling Using Laser-Induced Graphene for Flexible Electronics 

Wearable electronics have gained popularity since they allow quick and continuous access to vital information and suitable for many applications. The development of flexible devices is expected to further accelerate this trend by allowing wearable electronics on various applications.

However, high performance wearable electronics using flexible and stretchable devices cause the thermal management issues due to the complex design and strict temperature limitation to avoid skin burns. The available cooling schemes such as heat pipe or vapor chamber have been used for heat dissipation but these also should be attached to the package with aid of thermal interfacial material, thus reducing thermal conductive resistance is still challenging. This study explores chemical and heat transfer characteristics of laser-induced graphene nanowire which can be made easily and cost-effectively and embedded at flexible printed circuit board for direct cooling. The de-ionized water used as a working fluid. The sample varied the power of laser and showed various porous structures with thickness, porosity, permeability. The physical property of surface was observed using Field-Emission Scanning Electron Microscope (FE-SEM) and chemical property was analyzed through contact angle, raman spectroscopy, XRD, XPS. Using laser-induced graphene with oxygen plasma treated, capillary rate-of-rise experiment is conducted and its thermal performance with evaporation/boiling regime is experimented.

Presenting Author: Minsoo Kang Chungang University