In Situ Cross-Linking of Electrospun Poly(vinyl alcohol) Nanofibers
| Autor: | Christina Tang, Carl D. Saquing, Jonathon R. Harding, Saad A. Khan |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Vinyl alcohol
Materials science Morphology (linguistics) integumentary system Polymers and Plastics Organic Chemistry Hydrochloric acid Electrospinning Catalysis Inorganic Chemistry chemistry.chemical_compound chemistry Rheology Chemical engineering Nanofiber Polymer chemistry Materials Chemistry sense organs Glutaraldehyde skin and connective tissue diseases |
| Zdroj: | Macromolecules. 43:630-637 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/ma902269p |
| Popis: | We examine single step reactive electrospinning of poly(vinyl alcohol) (PVA) and a chemical cross-linking agent, glutaraldehyde (GA), with hydrochloric acid (HCl) as a catalyst to generate water insoluble PVA nanofibers. Such an approach using a conventional setup with no modification enables the fibers to cross-link during the electrospinning process, thereby eliminating the need for post-treatment. Significant changes in the rheological properties occur during in situ cross-linking, which we correlate with electrospinnability. In particular, we associate changes in dynamic rheological properties to changes in fiber morphology for two regions: (1) below the critical concentration to electrospin PVA only and (2) above the critical concentration to electrospin PVA only. In region 1 fiber morphology changes from beaded fibers to uniform fibers to flat fibers, and in region 2 fiber morphology changes from uniform fibers to flat fibers. Electrospinning windows to generate uniform fibers for both regions are d... |
| Databáze: | OpenAIRE |
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