혼합 시간에 따른 다공성 의 압축 탄성률 변화

초록

In this study, we investigated the changes in the mechanical properties of porous polydimethylsiloxane (PDMS)fabricated using salt particles as a function of mixing time. Compressive modulus measurements were performedthrough compression tests on porous PDMS samples prepared with varying mixing times, and the cross-sectionalstructures of these samples were observed under a scanning electron microscope. The results demonstrated anincreasing trend in the compressive modulus with longer mixing times, suggesting that insufficient mixing did notallow for the uniform dispersion of particles within the PDMS, leading to larger and more uneven pore sizes in thefinal structure. Furthermore, the experiment indicated no significant changes in the compressive modulus orcross-sectional structure for mixing times exceeding 180 s. Therefore, under the experimental conditions, a mixingtime of at least 180 s was necessary. This finding can serve as a reference for designing process conditions for thefuture fabrication of porous PDMS with the expectation of enhancing the uniformity and mechanical integrity of thematerial.

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