Read e-book online Polymer Micro- and Nanografting PDF

By Celestino Padeste, Sonja Neuhaus

Polymers have confirmed to be very compatible fabrics for topographic structuring, specifically in nanoreplication strategies. Micro- and Nanografting techniques deal with the chance for the formation of chemical styles and buildings on or in polymeric substrates utilizing rather easy methods. Polymer Micro- and Nanografting focuses on grafting concepts characterization and functions for the actual mix of polymer layers on polymer substrates. The authors, leaders during this sector of analysis, supply a complete survey on polymer-on-polymer grafting, protecting the newest advancements and destiny applications.

  • Provides a complete survey on polymer-on-polymer grafting, masking the newest advancements and destiny applications
  • Focuses on grafting suggestions, characterization and purposes for the actual mixture of polymer layers on polymer substrates
  • Concentrates at the mixture of structuring equipment and chemical functionalization of polymers
  • Addresses the chance for the formation of chemical styles and buildings on or in polymeric substrates

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Adv Energy Mater 2014;4(3). [26] Rager T. Structured radiation-grafted polymer films and membranes. J Appl Polym Sci 2006;100(1):292À4. [27] Desmet T, Morent R, De Geyter N, Leys C, Schacht E, Dubruel P. Nonthermal plasma technology as a versatile strategy for polymeric biomaterials surface modification: a review. Biomacromolecules 2009;10(9):2351À78. [28] Mortazavi M, Nosonovsky M. A model for diffusion-driven hydrophobic recovery in plasma-treated polymers. Appl Surf Sci 2012;258(18):6876À83.

After grafting with AA, a second x-ray exposure through a mask protecting the grafted regions was performed, followed by a second graft reaction using 4VP. 5 mm in width were clearly visible when selectively stained. The ion pair diffusion of the membranes was 100 to 1000 times higher compared to that of unstructured AA-grafted films, indicating preferential diffusion of cations and anions, respectively, through the chemically different domains in the film. Our work on bulk structuring was motivated by possible application of micrografted films as fuel cell membranes [20,21].

7A was only partially grafted; that is, the graft reaction was stopped before the reaction fronts from the front and the backside could join inside the membrane. The graft level at the backside was found to be considerably lower, which can be explained by the attenuation of the x-ray beam to approximately 30% of its initial intensity at the backside of the film. Using higher energy photons of a tungsten x-ray tube operated at 40 kV, well-defined structures throughout the entire film thickness were produced.

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