Stress-Responsive Sol–Gel Transition of Phase Change Material Emulsionsfor Exceptional Thermal Insulation Performance
발표자
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초록
내용
This study introduces a shear-responsive phase change material (PCM) emulsion fluid system. For this, n-hexadecane (PCM) emulsion droplets were enveloped with a metal–organic membrane (MOM) through the coordination of zinc ions and phytic acid. The MOM layer not only provides a rigid interfacial modulus but also allows the emulsion to exhibit viscoelastic behavior by shear stress-induced interdrop association. This MOM-enveloped PCM emulsion (PCMEMOM) showed typical sol–gel transition behavior in response to applied shear stress, indicating the injectable characteristic of the PCMEMOM. After observing the rheological hysteresis and thermal stability of the PCME under repetitive heating and cooling cycles, the thermal insulation performance of PCMEMOM was quantitatively and visually demonstrated. These findings suggest an efficient method to exploit high-performance insulation systems.