A special designed microfluidic chip applied for powder substance investigation using electromagnetic wave propagation, comprises of powder sample container at center. The container surrounded by 4 – 64 microfluidic channels crafted to delicately deliver fluid chemical substance into the container to process the chemical reaction. Windows of the container made used of materials those allow the electromagnetic wave to propagate. At each end of the chip located with tubes connected with channels i.e. one for injecting the chemical fluid and another one for the fluid to be drained off. This device can deliver the chemical fluid to mix with powder substance at the center within seconds through microchannels located around the sample container. While the chemical reaction starts, the device allows the electromagnetic wave to propagate for the measurement, simultaneously.
This microfluidic chip can be variously applied in many kind of experiments, for example, it can be used in monitoring hydration process of Ordinary Portland Cement (OPC) in period of the first few seconds with the Wide Angle X-ray Scattering (WAXS) technique installed at BL:1.3W, SLRI. The preliminary study revealed that by the microfluidic chip together with the WAXS experiment, can deliver the early signal of the hydration process comparatively to previous experiment at the time-resolved WAXS beamline elsewhere. Furthermore, this microfluidic chip can also be used with other techniques which require electromagnetic wave propagation such as X-ray Absorption Spectroscopy (XAS) and X-ray Diffraction (XRD). Currently, the fabricated microfluidic chip is under a process of a registration for an innovation patent to be issued by Department of Intellectual Property.
Microfluidic chip containing OPC powder for hydration investigation
X-ray scattering pattern of a mixture by WAXS technique at 60-minute after hydration
Dr. Wutthikrai Busayaporn and Dr. Rungrueang Phatthanakun -
Synchrotron Light Research Institute (Public Organization)