Produkt
KlappentextThe aim of this work is to develop an understanding of the adhesion mechanisms between ultrafine fibres and metallic substrates and a method for improving the adhesion at the interface. Electrospinning is used for producing ultrafine fibres, and peel force and resistance, according to DIN EN 29073-3, are used to evaluate the adhesion. Braided stents from nitinol are selected as a medical device, and thermoplastic polyurethane (TPU) for the ultrafine fibres. The stent structure is abstracted into a flat braid and a plate to investigate the influence of parameters such as effective width, surface struc-ture, or wraparound of fibres on adhesion. A fixture for peel tests on cylindrical structures is developed, and the corresponding test method is validated.Pre-coating of stent structures leads to the highest peel resistance of 642 ± 120 cN/cm and is assessed as a suitable bonding method for producing ultrafine fibre-coated stents. The evaluation shows that interdiffusion is the best practice to increase adhesion, followed by increasing covalent bonds. The wrap-around of ultrafine fibres around stent struts exerts the greatest influence on adhesion. As validation of the results, pre-coated pulmonary stents are pre-coated with an ultrafine fibre coating, are crimped, placed into a catheter and deployed. No delamination or damaging of the interface or fibre coating occurred during the validation tests. Finally, the potential of the technology is evaluated in a business case regarding the development in publicly funded projects and the exploitation of a start-up company called StentCoat GmbH.
Details
ISBN/GTIN978-3-8440-9227-1
ProduktartBuch
EinbandartKartoniert, Paperback
FormatUngenäht / geklebt
Verlag
ErscheinungsortDüren
ErscheinungslandDeutschland
Erscheinungsjahr2023
Erscheinungsdatum29.09.2023
Seiten228 Seiten
SpracheEnglisch
Gewicht300 g
Artikel-Nr.54740240
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