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5 Werkstofftechnik

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  • 5.1 Materialographie, Fraktographie und Alterung technischer Werkstoffe (336) RSS-Feed abonnieren
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Autor

  • Hidde, Gundula (2) (entfernen)

Erscheinungsjahr

  • 2015 (2) (entfernen)

Dokumenttyp

  • Zeitschriftenartikel (2) (entfernen)

Sprache

  • Englisch (2) (entfernen)

Schlagworte

  • Adhesion promotion (1)
  • Carbon fiber–epoxy resin laminates (1)
  • Electrospray ionization (ESI) (1)
  • Layer topography (1)
  • Thin polymer layers (1)

Organisationseinheit der BAM

  • 5 Werkstofftechnik (2)
  • 5.3 Mechanik der Polymerwerkstoffe (2)
  • 6 Materialschutz und Oberflächentechnik (2)
  • 6.6 Nano-Tribologie und Nanostrukturierung von Oberflächen (2)
  • 6.7 Oberflächenmodifizierung und -messtechnik (2)
  • 1 Analytische Chemie; Referenzmaterialien (1)
  • 1.3 Strukturanalytik (1)
  • 4 Material und Umwelt (1)
  • 4.1 Biologische Materialschädigung und Referenzorganismen (1)

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Coating of carbon fibers with adhesion-promoting thin poly(acrylic acid) and poly(hydroxyethylmethacrylate) layers using electrospray ionization (2015)
Wettmarshausen, Sascha ; Friedrich, Jörg Florian ; Meyer-Plath, Asmus ; Kalinka, Gerhard ; Hidde, Gundula ; Weidner, Steffen
Thin coatings of poly(acrylic acid) (PAA) and poly(hydroxyethylmethacrylate) (PHEMA) were deposited onto carbon fibers by means of the electrospray ionization (ESI) technique in ambient air. These high-molecular weight polymer layers were used as adhesion promoters in carbon fiber–epoxy resin composites. Within the ESI process, the carbon fibers were completely enwrapped with polymer in the upper 10 plies of a carbon fiber roving. As identified with scanning electron microscopy also shadowed fibers in a bundle as well as backsides of fiber rovings were pinhole-free coated with polymers (‘electrophoretic effect'). Under the conditions used, the layers have a granular structure. Residual solvent was absent in the deposit. PAA and PHEMA films did not show any changes in composition and structure in comparison with the original polymers as analyzed by X-ray photo-electron spectroscopy and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Single-fiber pullout tests of coated fibers embedded in epoxy resin showed significantly increased interfacial shear strength. It is assumed that chemical bonds between carbon fiber poly(acrylic acid) and epoxy resin contribute significantly to the improved interactions.
Polyglycerol coated polypropylene surfaces for protein and bacteria resistance (2015)
Lukowiak, M.C. ; Wettmarshausen, Sascha ; Hidde, Gundula ; Landsberger, Petra ; Boenke, Viola ; Rodenacker, K. ; Braun, Ulrike ; Friedrich, Jörg Florian ; Gorbushina, Anna ; Haag, R.
Polyglycerol (PG) coated polypropylene (PP) films were synthesized in a two-step approach that involved plasma bromination and subsequently grafting hyperbranched polyglycerols with very few amino functionalities. The influence of different molecular weights and density of reactive linkers were investigated for the grafted PGs. Longer bromination times and higher amounts of linkers on the surface afforded long-term stability. The protein adsorption and bacteria attachment of the PP-PG films were studied. Their extremely low amine content proved to be beneficial for preventing bacteria attachment.
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