Electrospinning with Condensed Tannins: Effects on Co-spinning with Zein

Autor:	Warren J. Grigsby, James Ian Dallmeyer, John F. Kadla
Rok vydání:	2013
Předmět:	chemistry.chemical_classification General Chemical Engineering General Chemistry Electrospinning Acetic acid chemistry.chemical_compound chemistry Proanthocyanidin Chemical engineering Nanofiber Dimethyl formamide Organic chemistry Tannin General Materials Science Thermal stability Spinning
Zdroj:	Journal of Wood Chemistry and Technology. 33:197-207
ISSN:	1532-2319 0277-3813
DOI:	10.1080/02773813.2013.773354
Popis:	Electrospinning can be applied to renewables creating new materials and applications. We have utilized electrospinning in an attempt to create nanofibers from condensed tannins as well as from binary conjugates formed between this tannin with zein protein. While attempts to directly electrospin pine bark tannin extract proved unsuccessful, combining zein with this tannin gave electrospun fiber from acetic acid and dimethyl formamide (DMF) solutions. To achieve nanofibers possessing significant tannin content, high solids content (≥35%) in DMF solution was required. Electrospun nanofibers (200–400 nm dia.) could be created from zein-tannin combinations with up to 80% tannin content and appropriate solution solids content. Nanofibers could be produced from pre-formed tannin-zein conjugates or via their direct combination as a mixture in the spinning solution. Analysis of thermal stability shows the zein-tannin conjugates have similar thermal properties and stability to zein, being stable up to 240°C.
Databáze:	OpenAIRE
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