Processing Stabilization of Polyethylene with Grape Peel Extract: Effect of Extraction Technology and Composition
Dry grape peel powder was extracted by three different techniques, stirred tank reactor, Soxhlet and ultrasound extraction. The composition, physical and chemical structure and inherent stability of the extracts were characterized by various methods. The extracts and reference compounds were added t...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/3/1011 |
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| author | Kata Takács Emese Pregi Erika Vági Tibor Renkecz Dóra Tátraaljai Béla Pukánszky |
| author_facet | Kata Takács Emese Pregi Erika Vági Tibor Renkecz Dóra Tátraaljai Béla Pukánszky |
| author_sort | Kata Takács |
| collection | DOAJ |
| description | Dry grape peel powder was extracted by three different techniques, stirred tank reactor, Soxhlet and ultrasound extraction. The composition, physical and chemical structure and inherent stability of the extracts were characterized by various methods. The extracts and reference compounds were added to polyethylene and their stabilization efficiency was determined in multiple extrusion experiments. The composition of the extracts was quite similar. Ten main compounds were identified in the extracts, which contained a considerable number of polyphenols, but only small amounts of quercetin and <i>trans</i>-resveratrol. The extracts proved to be more efficient processing stabilizers than <i>trans</i>-resveratrol and the commercial stabilizer, Irganox 1010, irrespective of the extraction technology used. In spite of their good processing stabilization effect, polymers containing the extracts had poor residual stability. The differences in processing and long-term stabilization must be related to the different structures of the polyphenols contained by the extracts and the reference compounds. The results clearly prove that the IC50 value determined by the DPPH assay is not suitable for the estimation of the efficiency of a compound as a stabilizer for polymers. |
| first_indexed | 2024-03-11T09:33:48Z |
| format | Article |
| id | doaj.art-e285c74d6af24d19a711b8986a2fc50a |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T09:33:48Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-e285c74d6af24d19a711b8986a2fc50a2023-11-16T17:26:22ZengMDPI AGMolecules1420-30492023-01-01283101110.3390/molecules28031011Processing Stabilization of Polyethylene with Grape Peel Extract: Effect of Extraction Technology and CompositionKata Takács0Emese Pregi1Erika Vági2Tibor Renkecz3Dóra Tátraaljai4Béla Pukánszky5Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, 1117 Budapest, HungaryInstitute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, 1117 Budapest, HungaryDepartment of Chemical and Environmental Process Engineering, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, 1111 Budapest, HungaryToxi-Coop Toxicological Research Center, Berlini u. 47-49, 1045 Budapest, HungaryInstitute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, 1117 Budapest, HungaryInstitute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, 1117 Budapest, HungaryDry grape peel powder was extracted by three different techniques, stirred tank reactor, Soxhlet and ultrasound extraction. The composition, physical and chemical structure and inherent stability of the extracts were characterized by various methods. The extracts and reference compounds were added to polyethylene and their stabilization efficiency was determined in multiple extrusion experiments. The composition of the extracts was quite similar. Ten main compounds were identified in the extracts, which contained a considerable number of polyphenols, but only small amounts of quercetin and <i>trans</i>-resveratrol. The extracts proved to be more efficient processing stabilizers than <i>trans</i>-resveratrol and the commercial stabilizer, Irganox 1010, irrespective of the extraction technology used. In spite of their good processing stabilization effect, polymers containing the extracts had poor residual stability. The differences in processing and long-term stabilization must be related to the different structures of the polyphenols contained by the extracts and the reference compounds. The results clearly prove that the IC50 value determined by the DPPH assay is not suitable for the estimation of the efficiency of a compound as a stabilizer for polymers.https://www.mdpi.com/1420-3049/28/3/1011grape peel extractpolyphenolsDPPH assayinherent stabilitymelt stabilizationlong-term stability |
| spellingShingle | Kata Takács Emese Pregi Erika Vági Tibor Renkecz Dóra Tátraaljai Béla Pukánszky Processing Stabilization of Polyethylene with Grape Peel Extract: Effect of Extraction Technology and Composition Molecules grape peel extract polyphenols DPPH assay inherent stability melt stabilization long-term stability |
| title | Processing Stabilization of Polyethylene with Grape Peel Extract: Effect of Extraction Technology and Composition |
| title_full | Processing Stabilization of Polyethylene with Grape Peel Extract: Effect of Extraction Technology and Composition |
| title_fullStr | Processing Stabilization of Polyethylene with Grape Peel Extract: Effect of Extraction Technology and Composition |
| title_full_unstemmed | Processing Stabilization of Polyethylene with Grape Peel Extract: Effect of Extraction Technology and Composition |
| title_short | Processing Stabilization of Polyethylene with Grape Peel Extract: Effect of Extraction Technology and Composition |
| title_sort | processing stabilization of polyethylene with grape peel extract effect of extraction technology and composition |
| topic | grape peel extract polyphenols DPPH assay inherent stability melt stabilization long-term stability |
| url | https://www.mdpi.com/1420-3049/28/3/1011 |
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