Rheological design of a transparent polymer matrix for embedded 3d printing of liquid metal
발표자
조수하 (경희대학교)
연구책임자
배재형 (경희대학교)
공동저자
조수하 (경희대학교), 배재형 (경희대학교)
초록
내용
Embedded 3D printing utilizes a viscoelastic support matrix to fabricate complex structures. In this system, the rheological design of the polymer matrix governs printability, dimensional accuracy of embedded functional inks. In this study, a crosslinked poly(acrylic acid) based viscoelastic polymer matrix exhibiting yield stress dominated behavior was developed to enable the stable structuring of high density gallium based liquid metal. Due to the density mismatch and interfacial instability between the liquid metal and the surrounding matrix, gravitational sedimentation and structural instability occur. However, by providing sufficient yield stress and elastic-dominant behavior at low strain, the liquid metal remains spatially suspended without gravitational collapse. This polymer matrix design provides a versatile platform for embedded printing of high density functional materials with potential applications in soft electronics and multifunctional polymer based devices.