In‐situ extraction and impregnation of black walnut husk into polyethylene film using supercritical carbon dioxide with an ethanol modifier
| Autor: | Jonathan E. Wenzel, Lihua Wang, Cheryl Samaniego, Veronica R. Moorman, Michelle L. Ammerman, Mitchell Hall, Isaiah Spencer‐Williams |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
supercritical fluid impregnation
LDPE Active packaging lcsh:TX341-641 02 engineering and technology Husk chemistry.chemical_compound 0404 agricultural biotechnology Original Research chemistry.chemical_classification Supercritical carbon dioxide Chemistry Supercritical fluid extraction 04 agricultural and veterinary sciences Polymer Polyethylene walnut husks supercritical fluid extraction antioxidants 021001 nanoscience & nanotechnology 040401 food science Low-density polyethylene Chemical engineering 13. Climate action Carbon dioxide 0210 nano-technology lcsh:Nutrition. Foods and food supply Food Science |
| Zdroj: | Food Science & Nutrition, Vol 8, Iss 1, Pp 612-619 (2020) Food Science & Nutrition, 8(1):612-619 Food Science & Nutrition |
| ISSN: | 2048-7177 |
| Popis: | Walnuts are commonly cultivated for their kernel, which is a rich source of antioxidant phenolic compounds. The husk likewise contains antioxidant and antimicrobial compounds, but is typically discarded without further processing. Antioxidant compounds are useful in creating active packaging films, but typically decompose at melt extrusion temperatures in polymer processing. Due to carbon dioxide's low critical point and ability to swell polymer films, supercritical carbon dioxide may be used to impregnate phenolic compounds into polymers. For this study, a novel technique is used to simultaneously produce walnut husk extracts and impregnate the extract into polymer films in the same batch extractor using supercritical carbon dioxide with a 15 wt‐% ethanol modifier at 60°C at 19.4 MPa. The effect of varying the loading of walnut husk in the extractor upon impregnation mass was evaluated with the impregnation mass of the film increasing with walnut husk loading. It was determined by FTIR, as well as the reduction of the protein cytochrome c, that antioxidant compounds may be extracted from walnut husks and impregnated into low‐density polyethylene film (LDPE) by this technique. Supercritical carbon dioxide with a 15 wt‐% ethanol modifier was used in an original technique to simultaneously produce walnut husk extracts and impregnate the extract into low density polyethylene films in the same batch extractor. It was determined that the impregnation mass of the film increases with walnut husk loading. It was determined by FTIR, as well as the reduction of the protein cytochrome c, that antioxidant compounds from walnut husks were impregnated into the film. |
| Databáze: | OpenAIRE |
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