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Hiller BT, Azzi JL, Rennert M. Improvement of the Thermo-Oxidative Stability of Biobased Poly(butylene succinate) (PBS) Using Biogenic Wine By-Products as Sustainable Functional Fillers. Polymers (Basel) 2023; 15:polym15112533. [PMID: 37299332 DOI: 10.3390/polym15112533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 05/20/2023] [Accepted: 05/26/2023] [Indexed: 06/12/2023] Open
Abstract
Biobased poly(butylene succinate) (PBS) represents one promising sustainable alternative to petroleum-based polymers. Its sensitivity to thermo-oxidative degradation is one reason for its limited application. In this research, two different varieties of wine grape pomaces (WPs) were investigated as fully biobased stabilizers. WPs were prepared via simultaneous drying and grinding to be used as bio-additives or functional fillers at higher filling rates. The by-products were characterized in terms of composition and relative moisture, in addition to particle size distribution analysis, TGA, and assays to determine the total phenolic content and the antioxidant activity. Biobased PBS was processed with a twin-screw compounder with WP contents up to 20 wt.-%. The thermal and mechanical properties of the compounds were investigated with DSC, TGA, and tensile tests using injection-molded specimens. The thermo-oxidative stability was determined using dynamic OIT and oxidative TGA measurements. While the characteristic thermal properties of the materials remained almost unchanged, the mechanical properties were altered within expected ranges. The analysis of the thermo-oxidative stability revealed WP as an efficient stabilizer for biobased PBS. This research shows that WP, as a low-cost and biobased stabilizer, improves the thermo-oxidative stability of biobased PBS while maintaining its key properties for processing and technical applications.
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Affiliation(s)
- Benedikt T Hiller
- Institute for Biopolymers (ibp) at Hof University, Hof University of Applied Sciences, 95028 Hof, Germany
- Plastics Technology Group, Faculty of Mechanical Engineering, Technische Universität Ilmenau, 98683 Ilmenau, Germany
| | - Julia L Azzi
- Medical and Biological Physics Program, Faculty of Science, McMaster University, Hamilton, ON L8S 4LD, Canada
| | - Mirko Rennert
- Institute for Biopolymers (ibp) at Hof University, Hof University of Applied Sciences, 95028 Hof, Germany
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2
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Processing Stabilization of Polyethylene with Grape Peel Extract: Effect of Extraction Technology and Composition. Molecules 2023; 28:molecules28031011. [PMID: 36770676 PMCID: PMC9918917 DOI: 10.3390/molecules28031011] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/15/2023] [Accepted: 01/16/2023] [Indexed: 01/20/2023] Open
Abstract
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 trans-resveratrol. The extracts proved to be more efficient processing stabilizers than trans-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.
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Li X, Zhang J, Liu C, Mu W, Kong Z, Li Y, Wang Z, Yu Q, Cheng G, Chen L. Effects of Pine Needle Extracts on the Degradation of LLDPE. Polymers (Basel) 2022; 15:polym15010032. [PMID: 36616382 PMCID: PMC9824879 DOI: 10.3390/polym15010032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/15/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022] Open
Abstract
Polyolefin suffers from degradation during processing and application. To prolong the service life, antioxidants are needed in the packing formula of polyolefin products. The usage of natural antioxidants could avoid potential health hazards aroused by synthetic ones. Pine needles have long lives and hardly rot, suggesting their high resistance to degradation. To provide a new candidate of natural antioxidants and add more value to pine needles, pine needle extracts (PNE) were investigated as the antioxidant of linear low-density polyethylene (LLDPE). PNE-modified LLDPE (PE-PNE) exhibited much better short-term and long-term aging resistance than pure LLDPE (PE): Oxidation induction time (OIT) of PE-PNE was 52 times higher than that of PE, and the increments of carbonyl index (CI) of PE-PNE-1st samples placed under daylight and in the dark were approximately 75% and 63% of PE under the same conditions. It could be attributed to the attractive antioxidant capacity of PNE (IC50 of DPPH radical scavenging was 115 μg/mL). In addition, the PE-PNE sample showed high processing stability and maintenance of the mechanical property during multiple extrusions: only a 0.2 g/10 min decrease in melting flow rate was found after five extrusions; the tensile strength and elongation at break were almost unchanged. All results reveal that pine needle extracts could play a role in LLDPE stabilization. Moreover, as pine needles are mainly considered a kind of waste, the present study would benefit the budget-reducing polyolefin industry.
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Affiliation(s)
- Xiangyao Li
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Jie Zhang
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Chengchao Liu
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Wenmin Mu
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Zhe Kong
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Yan Li
- School of Biological and Chemical Engineering, Qingdao Technical College, Qingdao 266555, China
| | - Zhongwei Wang
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Qing Yu
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
- Correspondence: (Q.Y.); (L.C.)
| | - Guiqing Cheng
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Long Chen
- College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
- Correspondence: (Q.Y.); (L.C.)
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Wine By-Products as Raw Materials for the Production of Biopolymers and of Natural Reinforcing Fillers: A Critical Review. Polymers (Basel) 2021; 13:polym13030381. [PMID: 33530517 PMCID: PMC7865623 DOI: 10.3390/polym13030381] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/20/2021] [Accepted: 01/22/2021] [Indexed: 01/19/2023] Open
Abstract
The plastic industry is today facing a green revolution; however, biopolymers, produced in low amounts, expensive, and food competitive do not represent an efficient solution. The use of wine waste as second-generation feedstock for the synthesis of polymer building blocks or as reinforcing fillers could represent a solution to reduce biopolymer costs and to boost the biopolymer presence in the market. The present critical review reports the state of the art of the scientific studies concerning the use of wine by-products as substrate for the synthesis of polymer building blocks and as reinforcing fillers for polymers. The review has been mainly focused on the most used bio-based and biodegradable polymers present in the market (i.e., poly(lactic acid), poly(butylene succinate), and poly(hydroxyalkanoates)). The results present in the literature have been reviewed and elaborated in order to suggest new possibilities of development based on the chemical and physical characteristics of wine by-products.
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Xia H, Gao H, Sun Q, Wu F, Ge T, Sui K, Wang Z, Song L, Huang X, Yu Q. Puerarin, an efficient natural stabilizer for both polyethylene and
polypropylene. J Appl Polym Sci 2020. [DOI: 10.1002/app.49599] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Huimin Xia
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Hui Gao
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Qiqi Sun
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Fazong Wu
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Tengteng Ge
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Kun Sui
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Zhongwei Wang
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Liang Song
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Xiaowen Huang
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Qing Yu
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
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6
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Nanni A, Ricci A, Versari A, Messori M. Wine derived additives as poly(butylene succinate) (PBS) natural stabilizers for different degradative environments. Polym Degrad Stab 2020. [DOI: 10.1016/j.polymdegradstab.2020.109381] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Xia H, Sui K, Ge T, Wu F, Sun Q, Wang Z, Song L, Huang X, Yu Q. Natural compounds from
Punica granatum
peel as multiple stabilizers for polyethylene. POLYM ENG SCI 2020. [DOI: 10.1002/pen.25506] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Huimin Xia
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Kun Sui
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Tengteng Ge
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Fazong Wu
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Qiqi Sun
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Zhongwei Wang
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Liang Song
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Xiaowen Huang
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
| | - Qing Yu
- Shandong University of Science and Technology College of Materials Science and Engineering Qingdao China
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Mellinas AC, Jiménez A, Garrigós MC. Pectin-Based Films with Cocoa Bean Shell Waste Extract and ZnO/Zn-NPs with Enhanced Oxygen Barrier, Ultraviolet Screen and Photocatalytic Properties. Foods 2020; 9:foods9111572. [PMID: 33138245 PMCID: PMC7692356 DOI: 10.3390/foods9111572] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 10/26/2020] [Accepted: 10/27/2020] [Indexed: 01/24/2023] Open
Abstract
In this work, pectin-based active films with a cocoa bean shell extract, obtained after waste valorisation of residues coming from the chocolate production process, and zinc oxide/zinc nanoparticles (ZnO/Zn-NPs) at different concentrations, were obtained by casting. The effect of the active additive incorporation on the thermal, barrier, structural, morphological and optical properties was investigated. Moreover, the photocatalytic properties of the obtained films based on the decomposition of methylene blue (MB) in aqueous solution at room temperature were also studied. A significant increase in thermal and oxidative stability was obtained with the incorporation of 3 wt% of ZnO/Zn-NPs compared to the control film. The addition of 5 wt% cocoa bean shell extract to pectin significantly affected the oxygen barrier properties due to a plasticizing effect. In contrast, the addition of ZnO/Zn-NPs at 1 wt% to pectin caused a decrease in oxygen transmission rate per film thickness (OTR.e) values of approximately 50% compared to the control film, resulting in an enhanced protection against oxidation for food preservation. The optical properties were highly influenced by the incorporation of the natural extract but this effect was mitigated when nanoparticles were also incorporated into pectin-based films. The addition of the extract and nanoparticles resulted in a clear improvement (by 98%) in UV barrier properties, which could be important for packaged food sensitive to UV radiation. Finally, the photocatalytic activity of the developed films containing nanoparticles was demonstrated, showing photodegradation efficiency values of nearly 90% after 60 min at 3 wt% of ZnO/Zn-NPs loading. In conclusion, the obtained pectin-based bionanocomposites with cocoa bean shell waste extract and zinc oxide/zinc nanoparticles showed great potential to be used as active packaging for food preservation.
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Monari S, Ferri M, Vannini M, Sisti L, Marchese P, Ehrnell M, Xanthakis E, Celli A, Tassoni A. Cascade strategies for the full valorisation of Garganega white grape pomace towards bioactive extracts and bio-based materials. PLoS One 2020; 15:e0239629. [PMID: 32946525 PMCID: PMC7500587 DOI: 10.1371/journal.pone.0239629] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 09/09/2020] [Indexed: 11/19/2022] Open
Abstract
Agro-waste reduction and reuse are among the current main social challenges. In this perspective, the present research was aimed at the complete valorisation of Garganega grape pomace by recovering bioactive phenol extracts and by testing the solid fibre extract residues in composite formulation for packaging applications. The pomace was derived from white wine production, therefore, respect to red pomace, it was promptly removed from must after pressing, and its exploitation can be particularly interesting and valuable as still rich in active compounds. Phenol extracts were obtained both via solvent-based and pressurised liquid extractions and their phytochemical compositions were compared in terms of total amount of phenols, flavonoids, flavanols, anthocyanins, hydroxycinnamic acids, and reducing sugars. Antioxidant activity and detailed phenol profiles were also achieved. The highest phenol yield was obtained via solvent-based extraction with 75% acetone (v/v), solid/liquid ratio 1:5, 2h incubation at 50°C (77.9 gGAeq/kgDW). The fibrous solid residue of the extraction was characterized via thermogravimetric analysis and used for composite preparation by melt mixing with the renewable and biodegradable PHBV polymer through a green approach (solvent-less process). The composites resulted thermally stable at high temperatures, showing initial degradation processes only at temperatures higher than 250°C. Differential scanning calorimetry analyses were carried out to study melting and crystallization phenomena, while mechanical properties were investigated by tensile tests. The materials finally showed properties similar to those of the matrix. The bio-composites can be considered as an alternative to plain PHBV, since they are less expensive and eco-friendlier thanks to a reduced polymeric content, and they could represent a suitable way for full agro-waste exploitation.
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Affiliation(s)
- Stefania Monari
- Department of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, Italy
| | - Maura Ferri
- Department of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, Italy
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy
| | - Micaela Vannini
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy
| | - Laura Sisti
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy
| | - Paola Marchese
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy
| | - Maria Ehrnell
- Department of Agriculture & Food, RISE – Research Institutes of Sweden, Gothenburg, Sweden
| | - Epameinondas Xanthakis
- Department of Agriculture & Food, RISE – Research Institutes of Sweden, Gothenburg, Sweden
| | - Annamaria Celli
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy
| | - Annalisa Tassoni
- Department of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, Italy
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David G, Vannini M, Sisti L, Marchese P, Celli A, Gontard N, Angellier-Coussy H. Eco-Conversion of Two Winery Lignocellulosic Wastes into Fillers for Biocomposites: Vine Shoots and Wine Pomaces. Polymers (Basel) 2020; 12:E1530. [PMID: 32664324 PMCID: PMC7408111 DOI: 10.3390/polym12071530] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/04/2020] [Accepted: 07/06/2020] [Indexed: 11/16/2022] Open
Abstract
Two winery residues, namely vine shoots (ViSh) and wine pomace (WiPo), were up-cycled as fillers in PHBV-based biocomposites. Answering a biorefinery approach, the impact of a preliminary polyphenols extraction step using an acetone/water mixture on the reinforcing effect of fillers was assessed. Biocomposites (filler content up to 20 wt%) were prepared by melt-mixing and compared in terms of final performance (thermal, mechanical and barrier). It was shown that the reinforcing effect was slightly better in the case of vine shoots, while it was not significantly affected by the pre-treatment, demonstrating that these two winery residues could be perfectly used as fillers in composite materials even after an extraction process to maximize their potential of valorization.
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Affiliation(s)
- Grégoire David
- JRU IATE 1208–Univ Montpellier, INRAE, 2 Place Pierre Viala, Bat 31, F-34060 Montpellier 01, France; (G.D.); (N.G.)
| | - Micaela Vannini
- Department of Civil, Chemical, Environmental, and Materials Engineering, University of Bologna, Via Terracini 28, 40131 Bologna, Italy; (L.S.); (P.M.); (A.C.)
| | - Laura Sisti
- Department of Civil, Chemical, Environmental, and Materials Engineering, University of Bologna, Via Terracini 28, 40131 Bologna, Italy; (L.S.); (P.M.); (A.C.)
| | - Paola Marchese
- Department of Civil, Chemical, Environmental, and Materials Engineering, University of Bologna, Via Terracini 28, 40131 Bologna, Italy; (L.S.); (P.M.); (A.C.)
| | - Annamaria Celli
- Department of Civil, Chemical, Environmental, and Materials Engineering, University of Bologna, Via Terracini 28, 40131 Bologna, Italy; (L.S.); (P.M.); (A.C.)
| | - Nathalie Gontard
- JRU IATE 1208–Univ Montpellier, INRAE, 2 Place Pierre Viala, Bat 31, F-34060 Montpellier 01, France; (G.D.); (N.G.)
| | - Hélène Angellier-Coussy
- JRU IATE 1208–Univ Montpellier, INRAE, 2 Place Pierre Viala, Bat 31, F-34060 Montpellier 01, France; (G.D.); (N.G.)
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Ferri M, Vannini M, Ehrnell M, Eliasson L, Xanthakis E, Monari S, Sisti L, Marchese P, Celli A, Tassoni A. From winery waste to bioactive compounds and new polymeric biocomposites: A contribution to the circular economy concept. J Adv Res 2020; 24:1-11. [PMID: 32181012 PMCID: PMC7063095 DOI: 10.1016/j.jare.2020.02.015] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 02/20/2020] [Accepted: 02/25/2020] [Indexed: 12/31/2022] Open
Abstract
The paper aims at optimising and validating possible routes toward the full valorisation of grape agrowaste to produce bioactive molecules and new materials. Starting from Merlot red pomace, phenol complex mixtures were successfully extracted by using two different approaches. Extracts obtained by solvent-based (SE) technique contained up to 46.9 gGAeq/kgDW of total phenols. Depending on the used solvent, the prevalence of compounds belonging to different phenol families was achieved. Pressurized liquid extraction (PLE) gave higher total phenol yields (up to 79 gGAeq/kgDW) but a lower range of extracted compounds. All liquid extracts exerted strong antioxidant properties. Moreover, both SE and PLE extraction solid residues were directly exploited (between 5 and 20% w/w) to prepare biocomposite materials by direct mixing via an eco-friendly approach with PHBV polymer. The final composites showed mechanical characteristics similar to PHVB matrix. The use of pomace residues in biocomposites could therefore bring both to the reduction of the cost of the final material, as a lower amount of costly PHBV is used. The present research demonstrated the full valorisation of grape pomace, an agrowaste produced every year in large amounts and having a significant environmental impact.
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Affiliation(s)
- Maura Ferri
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, via Terracini 28, 40131 Bologna, Italy
- Department of Biological, Geological and Environmental Sciences, University of Bologna, via Irnerio 42, 40126 Bologna, Italy
| | - Micaela Vannini
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, via Terracini 28, 40131 Bologna, Italy
| | - Maria Ehrnell
- RISE – Research Institutes of Sweden, Unit of Agrifood & Bioscience, Frans Perssons Väg 6, 41276 Gothenburg, Sweden
| | - Lovisa Eliasson
- RISE – Research Institutes of Sweden, Unit of Agrifood & Bioscience, Frans Perssons Väg 6, 41276 Gothenburg, Sweden
| | - Epameinondas Xanthakis
- RISE – Research Institutes of Sweden, Unit of Agrifood & Bioscience, Frans Perssons Väg 6, 41276 Gothenburg, Sweden
| | - Stefania Monari
- Department of Biological, Geological and Environmental Sciences, University of Bologna, via Irnerio 42, 40126 Bologna, Italy
| | - Laura Sisti
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, via Terracini 28, 40131 Bologna, Italy
| | - Paola Marchese
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, via Terracini 28, 40131 Bologna, Italy
| | - Annamaria Celli
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, via Terracini 28, 40131 Bologna, Italy
| | - Annalisa Tassoni
- Department of Biological, Geological and Environmental Sciences, University of Bologna, via Irnerio 42, 40126 Bologna, Italy
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Impact of natural antioxidant systems on the oxidation resistance and mechanical properties of polypropylene. POLISH JOURNAL OF CHEMICAL TECHNOLOGY 2020. [DOI: 10.2478/pjct-2020-0010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
This paper describes the separation of oxidation resistant components from the seeds of pomegranate (PSA), grape (GSE) and sea buckthorn (SSE). The anti-oxidation properties of the resultant extracts, used as the natural anti-oxidants for polypropylene (PP), were compared with Irganox1010. The effects of these natural antioxidants on the antioxidant levels of PP samples were estimated by thermal oxidative aging and micromixed rheology, OIT, XRD, SEM, TEM and mechanical properties tests of samples before and after aging. The results show that adding PSA, GSE and SSE can obviously increase the mechanical properties of PP. In addition, the molding stability of polypropylene raw material is prolonged and improved. Moreover, the mechanical properties of the PP samples after 240 h of thermal oxidative aging indicates that, the best results, closest to the anti-oxidation ability of Irganox1010, can be obtained when the additive amount is 0.5% (wt%) for PSE or 0.7% (wt%) for GSE.
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Nanni A, Messori M. Effect of the wine lees wastes as cost‐advantage and natural fillers on the thermal and mechanical properties of poly(3‐hydroxybutyrate‐co‐hydroxyhexanoate) (PHBH) and poly(3‐hydroxybutyrate‐co‐hydroxyvalerate) (PHBV). J Appl Polym Sci 2019. [DOI: 10.1002/app.48869] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- A. Nanni
- Department of Engineering "Enzo Ferrari"University of Modena and Reggio Emilia Via Pietro Vivarelli 10/1, 41125 Modena Italy
| | - M. Messori
- Department of Engineering "Enzo Ferrari"University of Modena and Reggio Emilia Via Pietro Vivarelli 10/1, 41125 Modena Italy
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14
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Nanni A, Battegazzore D, Frache A, Messori M. Thermal and UV aging of polypropylene stabilized by wine seeds wastes and their extracts. Polym Degrad Stab 2019. [DOI: 10.1016/j.polymdegradstab.2019.04.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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