Analysis of Platsil Gel-10 Silicone-based Coating Applied to Polylactic Acid Hand Prosthesis

Abstract

This study explores the application of a Platsil Gel-10 silicone coating to a polylactic acid (PLA) hand prosthesis fabricated through fused deposition modeling (FDM). The objective was to evaluate both thermal behavior and aesthetic performance of the coated structure under practical stress conditions. Thermal characterization was conducted on individual prosthetic fingers using K-type thermocouples during controlled and high-intensity heat exposure. Temperature progression followed a largely linear trend across trials, suggesting predictable heat transfer behavior and no immediate signs of material instability. Beyond thermal response, the surface and visual qualities of the silicone layer were examined. Color matching was assessed against a reference skin tone, and surface morphology was inspected using microphotography. The coating demonstrated detailed reproduction of dermal features, including fine ridges and pores, while adhesion testing showed no early delamination under cyclic loading. Tactile evaluation indicated a compliant surface texture comparable to soft tissue. Although initial performance was encouraging, limitations were observed in color retention and in the projected durability of the coating under prolonged mechanical wear. These findings highlight areas for material formulation refinement. Overall, the results indicate that silicone-coated PLA structures may provide a cost-accessible pathway for improving the cosmetic realism of upper-limb prostheses, particularly in settings where manufacturing resources are constrained.