[1PS-262]
우수논문발표상 응모자Breaking the Trade-Off: Interfacial CVD Engineering of Transparent Elastomers for Stretchable Electronic Interfaces
발표자이건오 (충남대학교)
연구책임자이경진 (충남대학교)
Abstract
Stretchable displays require materials that maintain high deformability while simultaneously providing surface hardness, low tackiness, and excellent mechanical recovery—properties that are typically conflicting in conventional elastomers. Solution-processed approaches often involve complex procedures, thick coatings, residual solvents, and interfacial defects, with limited recovery performance. Here, an interfacial chemical vapor deposition (CVD) strategy using parylene enables precise control of surface free volume and direct enhancement of bulk-like properties in transparent elastomers. When applied to polyurethane, parylene infiltration forms a composite-like interfacial layer that significantly improves surface and mechanical characteristics. Surface hardness increases from 1H to 6H, tackiness decreases from 23.1 to 0.1 gf, strain recovery improves from 83.2% to 97.2%, and residual stress drops from 17 to 0.73 kPa. These enhancements are achieved without sacrificing optical transparency (>97.2%) or stretchability (up to 50% strain). The approach is broadly applicable to other elastomers, large-area substrates, and stretchable QLED devices, offering a scalable, solvent-free platform for next-generation stretchable electronics.