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Polyaramid-Based Flexible Antibacterial Coatings Fabricated Using Laser-Induced Carbonization and Copper Electroplating

Mamleyev, Emil R.

Abstract:
A method for the fabrication of flexible electrical circuits on polyaramid substrates is presented, based on laser-induced carbonisation followed by copper electroplating. Locally carbonised flexible sheets of polyaramid (Nomex), by laser radiation, creates rough and highly porous microstructures that show a higher degree of graphitisation compared to thermally carbonised Nomex sheet. The found recipe for laser-induced carbonisation creates conductivities of up to \SI{\sim 45}{\siemens\per\centi\m}, thereby exceeding that observed for thermally pyrolysed materials (\SI{\sim 38}{\siemens\per\centi\m}) and laser carbon derived from Kapton using same laser wavelength (\SI{\sim 35}{\siemens\per\centi\m}). The electrical conductivity of the carbonised tracks was further improved by electroplating with copper. To demonstrate the electrical performance, fabricated circuits were tested and improvement of the sheet resistance was determined. Copper films exhibit antimicrobial activity and were used to fabricate customised flexible antibacterial coatings. The integration of laser carbonisation and electroplating technologies in a polyaramid substrate points to the development of customised circuit designs for smart textiles operating in high temperature environments.

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Zugehörige Institution(en) am KIT 3D Matter Made to Order (3DMM2O)
Institut für Mikrostrukturtechnik (IMT)
Institut für Funktionelle Grenzflächen (IFG)
Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Forschungsdaten
Publikationsdatum 10.02.2021
Erstellungsdatum 05.02.2021 - 05.02.2021
Identifikator DOI (KIT): 10.5445/IR/1000129378
KITopen-ID: 1000129378
Lizenz Creative Commons Namensnennung 4.0 International
Projektinformation EXC 2082; 3DMM2O (DFG, DFG EXSTRAT, EXC 2082/1_I)
Vorab online veröffentlicht am 05.02.2021
Schlagwörter antibacterial coating; copper electroplating; flexible circuits; laser-induced carbonization; polyaramid
Liesmich

The data were collected with multiple devices and the original files were saved in multiple formats. All data were saved with OriginPro software and analyzed using built-in toolkits. In some cases, the analyzed data is further processed with MS Excel and included in the folders.
Original images acquired with Scanning Electron Micrsocope were stored in corresponding folders. For publication they were prepared with CorelDraw graphical editor.

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