Electrical Conductive Surface Functionalization of Polycarbonate Parts with CNT Composite Films during Injection Molding

Kroschwald, Felix; Müller, M.; Pötschke, Petra; Nagel, Jürgen; Heinrich, Gert

doi:10.14355/papt.2016.04.004

Cited by 2 publications

(1 citation statement)

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“…Beside the chemical functionalization of the polymer surface, for some applications a well-designed topography with microcavities on the surface is desired, where the inner cavity surfaces are chemically functionalized, e.g., to increase the effective surface area or to provide microcavities as reaction centers. In previous work we have shown how particles can be embedded in the polymer melt during molding. − This idea is revisited here by the use of sacrificial core–shell particles, i.e., particles whose core will be dissolved in a later stage of the procedure and where the functional shell remains on the inner surface of the formed cavities. We present a method of surface functionalization that is performed during manufacturing of the sample part.…”

Section: Introductionmentioning

confidence: 99%

Green Approach for Manufacturing of Polymer Surface Structures with Microcavities Having Robust Chemically Functionalized Inner Surfaces

Zimmermann

Schlenstedt

Schwarz

et al. 2022

ACS Appl. Polym. Mater.

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Polymer surface modification is a key step in manufacturing for applications of parts in biotechnology, catalysis, sensing, and other fields. However, functionalization approaches with sufficient robustness are often connected with the use of harsh chemical treatment and/or high-energy consumption. We present a versatile approach for chemical functionalization of polymer surfaces, which is compatible with fused filament fabrication, is energy efficient, and does not require harmful chemicals. The modification takes advantage of embedding of polyethylenimine-coated calcium carbonate particles into polymer melts and subsequent dissolution of the particles allowing for further modification of the residual polyethylenimine. The process results in surfaces that are hierarchically structured and feature undercuts, rendering them robust against wear and tear as well as increasing the specific area available for functionalization. We show proof-of-concept functionalization with dyes, metal layers, and metal nanoparticles, demonstrating the versatility of our concept and discuss the potential for catalysis and biotechnology.

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Section: Introductionmentioning

confidence: 99%