Synthesis and solution rheology of adenine-containing polyelectrolytes for electrospinning

Sean T. Hemp, Matthew T. Hunley, Shijing Cheng, Kerry C. Demella, Timothy Edward Long

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Conventional free radical copolymerization of 9-vinylbenzyladenine (VBA) and 2-(dimethylamino)ethyl methacrylate (DMAEMA) with subsequent protonation afforded the synthesis of adenine-containing polyelectrolytes. All adenine-containing polyelectrolytes exhibited classical polyelectrolyte solution rheological behavior with scaling factors near 0.6 and 1.6 in the semidilute unentangled and semidilute entangled regimes, respectively. However, the adenine-containing polyelectrolytes deviated from polyelectrolyte behavior in the concentrated regime with increasing scaling factors as adenine-incorporation increased due to intermolecular association. The electrospinning behavior exhibited a strong dependence on adenine incorporation. Higher adenine-incorporation decreased the normalized concentration for fiber formation from 4.5C e for PDMAEMA•HCl to 2.9C e for 35 mol% VBA. The required zero-shear viscosities for electrospinning were 312 cP for PDMAEMA•HCl and 116 cP for the 35 mol% VBA copolymer. Increasing the adenine concentration also increased the fiber diameters presumably due to adenine-adenine interactions. These adenine-decorated electrospun mats exhibit potential in a variety of applications including filtration, purification, and tissue scaffolding.

Original languageEnglish
Pages (from-to)1437-1443
Number of pages7
JournalPolymer
Volume53
Issue number7
DOIs
Publication statusPublished - 2012 Mar 22
Externally publishedYes

Keywords

  • Electrospinning
  • Nucleobases
  • Polyelectrolytes

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

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  • Cite this

    Hemp, S. T., Hunley, M. T., Cheng, S., Demella, K. C., & Long, T. E. (2012). Synthesis and solution rheology of adenine-containing polyelectrolytes for electrospinning. Polymer, 53(7), 1437-1443. https://doi.org/10.1016/j.polymer.2012.02.009