1
|
Romeiro A, Teixeira C, Costa H, Coelho JFJ, Serra AC. Recycling Polyethylene/Polyamide Multilayer Films with Poly(isoprene- g-Maleic Anhydride) Compatibilizer. Polymers (Basel) 2024; 16:1079. [PMID: 38674998 PMCID: PMC11053548 DOI: 10.3390/polym16081079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/26/2024] [Accepted: 04/10/2024] [Indexed: 04/28/2024] Open
Abstract
Polymers generally form incompatible mixtures that make the process of recycling difficult, especially the mechanical recycling of mixed plastic waste. One of the most commonly used films in the packaging industry is multilayer films, mainly composed of polyethylene (PE) and polyamide (PA). Recycling these materials with such different molecular structures requires the use of compatibilizers to minimize phase separation and obtain more useful recycled materials. In this work, commercial polyisoprene-graft-maleic anhydride (PI-g-MA) was tested as a compatibilizer for a blend of PE and PA derived from the mechanical recycling of PE/PA multilayer films. Different amounts of PI-g-MA were tested, and the films made with 1.5% PI-g-MA showed the best results in terms of mechanical properties and dart impact. The films were also characterized thermally via thermogravimetric analysis (TG) and differential scanning calorimetry (DSC), using Fourier-transform infrared spectroscopy (FTIR), and morphologically using a scanning electron microscope (SEM). Other parameters, such as tearing and perforation, were analyzed.
Collapse
Affiliation(s)
- Andreia Romeiro
- University of Coimbra, Centre for Mechanical Engineering Materials and Processes, ARISE, Department of Chemical Engineering, Rua Silvio Lima- Polo II, 3030-790 Coimbra, Portugal; (A.R.); (J.F.J.C.)
| | - Cidália Teixeira
- Componit, lda, Estrada Nacional 3 km 28.6, Vila Chã de Ourique, 2071-621 Santarém, Portugal;
| | - Henrique Costa
- Inventive Matl, Casal dos Eucaliptos, Casais Lagartos, 2070-389 Pontével, Portugal;
| | - Jorge F. J. Coelho
- University of Coimbra, Centre for Mechanical Engineering Materials and Processes, ARISE, Department of Chemical Engineering, Rua Silvio Lima- Polo II, 3030-790 Coimbra, Portugal; (A.R.); (J.F.J.C.)
| | - Arménio C. Serra
- University of Coimbra, Centre for Mechanical Engineering Materials and Processes, ARISE, Department of Chemical Engineering, Rua Silvio Lima- Polo II, 3030-790 Coimbra, Portugal; (A.R.); (J.F.J.C.)
| |
Collapse
|
2
|
Cappello M, Strangis G, Cinelli P, Camodeca C, Filippi S, Polacco G, Seggiani M. From Waste Vegetable Oil to a Green Compatibilizer for HDPE/PA6 Blends. Polymers (Basel) 2023; 15:4178. [PMID: 37896422 PMCID: PMC10611262 DOI: 10.3390/polym15204178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 10/18/2023] [Accepted: 10/19/2023] [Indexed: 10/29/2023] Open
Abstract
When properly compatibilized, the blending of polyethylene (PE) and polyamide (PA) leads to materials that combine low prices, suitable processability, impact resistance, and attractive mechanical properties. Moreover, the possibility of using these polymers without prior separation may be a suitable opportunity for their recycling. In this work, the use of an epoxidized waste vegetable oil (EWVO) was investigated as a green compatibilizer precursor (CP) for the reactive blending of a high-density PE (HDPE) with a polyamide-6 (PA6). EWVO was synthesized from waste vegetable cooking oil (WVO) using ion-exchange resin (Amberlite) as a heterogeneous catalyst. HDPE/PA6 blends were produced with different weight ratios (25/75, 75/25, 85/15) and amounts of EWVO (1, 2, 5 phr). Samples with WVO or a commercial fossil-based CP were also prepared for comparison. All the blends were characterized by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), rheology, and mechanical tests. In the case of HDPE/PA6 75/25 and 85/15 blends, the addition of EWVO at 2 phr showed a satisfactory compatibilizing effect, thus yielding a material with improved mechanical properties with respect to the blend without compatibilizer. On the contrary, the HDPE/PA6 25/75 ratio yielded a material with a high degree of crosslinking that could not be further processed or characterized. In conclusion, the results showed that EWVO had a suitable compatibilizing effect in HDPE/PA6 blends with high HDPE content, while it resulted in unsuitable for blends with high content of PA6.
Collapse
Affiliation(s)
- Miriam Cappello
- Department of Civil and Industrial Engineering, University of Pisa, L.go L. Lazzarino 2, 56122 Pisa, Italy; (M.C.); (G.S.); (P.C.); (M.S.)
| | - Giovanna Strangis
- Department of Civil and Industrial Engineering, University of Pisa, L.go L. Lazzarino 2, 56122 Pisa, Italy; (M.C.); (G.S.); (P.C.); (M.S.)
| | - Patrizia Cinelli
- Department of Civil and Industrial Engineering, University of Pisa, L.go L. Lazzarino 2, 56122 Pisa, Italy; (M.C.); (G.S.); (P.C.); (M.S.)
| | - Caterina Camodeca
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano 33, 56126 Pisa, Italy;
| | - Sara Filippi
- Department of Civil and Industrial Engineering, University of Pisa, L.go L. Lazzarino 2, 56122 Pisa, Italy; (M.C.); (G.S.); (P.C.); (M.S.)
| | - Giovanni Polacco
- Department of Civil and Industrial Engineering, University of Pisa, L.go L. Lazzarino 2, 56122 Pisa, Italy; (M.C.); (G.S.); (P.C.); (M.S.)
| | - Maurizia Seggiani
- Department of Civil and Industrial Engineering, University of Pisa, L.go L. Lazzarino 2, 56122 Pisa, Italy; (M.C.); (G.S.); (P.C.); (M.S.)
| |
Collapse
|
3
|
Prithiviraj M, Sasidharan A, Krishna BM, Sabu S, Sunooj KV, Anoop K, George J. Characterization and qualitative evaluation of cassava starch-chitosan edible food wrap enriched with culinary leaf powders for eco-friendly food packaging applications. FOOD SCI TECHNOL INT 2023:10820132231179492. [PMID: 37264607 DOI: 10.1177/10820132231179492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Cassava starch-based edible food wraps were prepared by incorporating leaf powder from Indian curry leaf and Malabar bay leaf, reinforced with different (0.2, 0.4, 0.6, 0.8) wt.% of chitosan. Eleven combinations of films were prepared and their sensory acceptability, physical properties, Fourier-transform infrared spectroscopic (FTIR) spectrum, and scanning electron microscopy (SEM) image, were evaluated. The thickness of the films ranged from 0.198 ± 0.12 to 0.372 ± 0.27 mm. Tensile strength was reported to be the highest (40.71 ± 1.21 MPa) in the curry leaf powder incorporated sample. Maximum elongation at break was reported by bay leaf powder incorporated (5.8 ± 1.59%) sample. The Young's modulus values were observed to be increasing along with the concentration of chitosan. Maximum seal strength values were reported by curry leaf powder incorporated film with 0.8% chitosan (2.93 ± 0.22 N/mm). The leaf powder incorporated samples reported a higher flavonoid content compared to the control. The color analysis (L*, a*, b*) of the films was identical to the natural leaf color. The SEM images indicated a rough texture for the leaf powder incorporated films. The FTIR evaluation confirmed the presence of the respective functional groups. The statistical evaluation done by statistical package for social sciences software showed that all the data were significantly different (P ≤ 0.05.). The study demonstrated the potential of incorporation of leaf powder and chitosan to enhance the properties of starch-based edible packaging.
Collapse
Affiliation(s)
- Mohandas Prithiviraj
- Department of Fish Processing Technology, Kerala University of Fisheries and Ocean Studies, Kerala, India
| | - Abhilash Sasidharan
- Department of Fish Processing Technology, Kerala University of Fisheries and Ocean Studies, Kerala, India
| | - Bindu Murali Krishna
- Sophisticated Test and Instrumentation Centre, Cochin University of Science and Technology, Kerala, India
| | - Sarsan Sabu
- School of Industrial Fisheries, Cochin University of Science and Technology, Kerala, India
| | | | - Kiliyanamkandy Anoop
- Department of Physics, Cochin University of Science and Technology, Kerala, India
| | - Johnsy George
- Food Engineering & Packaging, Defence Food Research Laboratory, Mysuru, India
| |
Collapse
|
4
|
Arman Alim AA, Baharum A, Mohammad Shirajuddin SS, Anuar FH. Blending of Low-Density Polyethylene and Poly(Butylene Succinate) (LDPE/PBS) with Polyethylene-Graft-Maleic Anhydride (PE-g-MA) as a Compatibilizer on the Phase Morphology, Mechanical and Thermal Properties. Polymers (Basel) 2023; 15:polym15020261. [PMID: 36679142 PMCID: PMC9860711 DOI: 10.3390/polym15020261] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/27/2022] [Accepted: 12/27/2022] [Indexed: 01/06/2023] Open
Abstract
It is of significant concern that the buildup of non-biodegradable plastic waste in the environment may result in long-term issues with the environment, the economy and waste management. In this study, low-density polyethylene (LDPE) was compounded with different contents of poly(butylene succinate) (PBS) at 10-50 wt.%, to evaluate the potential of replacing commercial plastics with a biodegradable renewable polymer, PBS for packaging applications. The morphological, mechanical and thermal properties of the LDPE/PBS blends were examined in relation to the effect of polyethylene-graft-maleic anhydride (PE-g-MA) as a compatibilizer. LDPE/PBS/PE-g-MA blends were fabricated via the melt blending method using an internal mixer and then were compression molded into test samples. The presence of LDPE, PBS and PE-g-MA individually in the matrix for each blend presented physical interaction between the constituents, as shown by Fourier-transform infrared spectroscopy (FTIR). The morphology of LDPE/PBS/PE-g-MA blends showed improved compatibility and homogeneity between the LDPE matrix and PBS phase. Compatibilized LDPE/PBS blends showed an improvement in the tensile strength, with 5 phr of compatibilizer providing the optimal content. The thermal stability of LDPE/PBS blends decreased with higher PBS content and the thermal stability of compatibilized blends was higher in contrast to the uncompatibilized blends. Therefore, our research demonstrated that the partial substitution of LDPE with a biodegradable PBS and the incorporation of the PE-g-MA compatibilizer could develop an innovative blend with improved structural, mechanical and thermal properties.
Collapse
Affiliation(s)
- Aina Aqila Arman Alim
- Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Selangor, Malaysia
| | - Azizah Baharum
- Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Selangor, Malaysia
- Polymer Research Center (PORCE), Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Selangor, Malaysia
| | | | - Farah Hannan Anuar
- Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Selangor, Malaysia
- Polymer Research Center (PORCE), Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Selangor, Malaysia
- Correspondence:
| |
Collapse
|
5
|
Ahmad H, Rodrigue D. Crosslinked polyethylene: A review on the crosslinking techniques, manufacturing methods, applications, and recycling. POLYM ENG SCI 2022. [DOI: 10.1002/pen.26049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hibal Ahmad
- Department of Chemical Engineering Université Laval Quebec City Quebec Canada
| | - Denis Rodrigue
- Department of Chemical Engineering Université Laval Quebec City Quebec Canada
| |
Collapse
|
6
|
Kondo MY, Montagna LS, Morgado GFDM, Castilho ALGD, Batista LAPDS, Botelho EC, Costa ML, Passador FR, Rezende MC, Ribeiro MV. Recent advances in the use of Polyamide-based materials for the automotive industry. Polímeros 2022. [DOI: 10.1590/0104-1428.20220042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | | | | | | | | | | | - Michelle Leali Costa
- Universidade Estadual Paulista, Brasil; Instituto de Pesquisas Tecnológicas, Brasil
| | | | | | | |
Collapse
|
7
|
Affiliation(s)
- Alexis Morinval
- BioTeam/ICPEES-ECPM, UMR CNRS 7515, Université de Strasbourg, Strasbourg, Cedex 2, France
| | - Luc Averous
- BioTeam/ICPEES-ECPM, UMR CNRS 7515, Université de Strasbourg, Strasbourg, Cedex 2, France
| |
Collapse
|
8
|
Schweighuber A, Gall M, Fischer J, Liu Y, Braun H, Buchberger W. Development of an LC-MS method for the semiquantitative determination of polyamide 6 contaminations in polyolefin recyclates. Anal Bioanal Chem 2021; 413:1091-1098. [PMID: 33244685 PMCID: PMC7813719 DOI: 10.1007/s00216-020-03071-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 11/09/2020] [Accepted: 11/13/2020] [Indexed: 11/30/2022]
Abstract
Recycling will be of increasing importance in the future, especially for plastic packaging waste mainly consisting of polyolefins. One major problem of recyclates comprises impurities which can have a significant negative impact on future product properties. Polyamide 6 can be found widely as contaminant in recycled polyolefins, leading to a need of quantification methods thereof. In this paper, a method development for the quantitative analysis of polyamide 6 is presented based on analysing ε-caprolactam and related cyclic oligomers as marker compounds in model recyclates of high- and low-density polyethylene and polypropylene compounded with low amounts of polyamide 6. For the method development and tentative identification of the different cyclic compounds, a HPLC-QTOF-MS was used and it was possible to detect six different compounds, ε-caprolactam and the corresponding cyclic di- to hexamer. The quantification was performed with a HPLC-QQQ-MS, equipped with a HILIC column, after sample preparation via microwave-assisted extraction. It could be shown that a good linearity from 0.2 up to 5 wt% polyamide 6 in the different polyolefins can be achieved. The cyclic trimer and tetramer show a low limit of quantification and are therefore well-suited for the quantification, whereas the other cyclic compounds can be then used as qualifiers to avoid false positives. To guarantee the applicability of the method, six real recyclate materials were analysed, whereby in three of them low amounts of polyamide 6 could be detected. Graphical abstract.
Collapse
Affiliation(s)
- Andrea Schweighuber
- Institute of Analytical Chemistry, Johannes Kepler University, 4040, Linz, Austria.
| | - Markus Gall
- Institute of Polymeric Materials and Testing, Johannes Kepler University, 4040, Linz, Austria
| | - Jörg Fischer
- Institute of Polymeric Materials and Testing, Johannes Kepler University, 4040, Linz, Austria
| | - Yi Liu
- CES - Circular Economy Solutions - Innovation & Technology, Borealis Polyolefine GmbH, 4021, Linz, Austria
| | - Hermann Braun
- CES - Circular Economy Solutions - Innovation & Technology, Borealis Polyolefine GmbH, 4021, Linz, Austria
| | - Wolfgang Buchberger
- Institute of Analytical Chemistry, Johannes Kepler University, 4040, Linz, Austria
| |
Collapse
|
9
|
López de Dicastillo C, Velásquez E, Rojas A, Guarda A, Galotto MJ. The use of nanoadditives within recycled polymers for food packaging: Properties, recyclability, and safety. Compr Rev Food Sci Food Saf 2020; 19:1760-1776. [PMID: 33337105 DOI: 10.1111/1541-4337.12575] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 04/17/2020] [Accepted: 04/21/2020] [Indexed: 12/29/2022]
Abstract
Nanotechnology is considered a highly valued technology to reduce the current environmental problem that is derived from plastic accumulation. The need to recycle and reuse packaging materials is essential to create a sustainable society towards a circular economy. However, the reprocessing of polymers leads to the deterioration of their characteristic mechanical, optical, thermal, and barrier properties due to the degradation of their polymeric chains. When recycled polymers are reinforced with nanoadditives, aforementioned properties improve and their use in the circular economy is more viable. In this review, different types of nanoadditives and recent advances in the development of recycled polymer nanocomposites reinforced with nanoadditives will be presented. In addition, there is a description of two research topics of current interest, recyclability of nanocomposites and safety for food packaging applications. Recyclability of nanocomposites requires a study that includes the nature of the polymer matrix, the type of polymer and the concentration of nanofiller, the morphology, the presence of additives, and the conditions of the thermal-mechanical cycles. Finally, safety section is dedicated to clarify the migration process in nanoreinforced-recycled polymers in order to assess their safety for food contact applications.
Collapse
Affiliation(s)
- Carol López de Dicastillo
- Center of Innovation in Packaging (LABEN), Technology Faculty. CEDENNA (Center for the Development of Nanoscience and Nanotechnology), University of Santiago de Chile (USACH), Santiago, Chile
| | - Eliezer Velásquez
- Center of Innovation in Packaging (LABEN), Technology Faculty. CEDENNA (Center for the Development of Nanoscience and Nanotechnology), University of Santiago de Chile (USACH), Santiago, Chile
| | - Adrián Rojas
- Center of Innovation in Packaging (LABEN), Technology Faculty. CEDENNA (Center for the Development of Nanoscience and Nanotechnology), University of Santiago de Chile (USACH), Santiago, Chile
| | - Abel Guarda
- Center of Innovation in Packaging (LABEN), Technology Faculty. CEDENNA (Center for the Development of Nanoscience and Nanotechnology), University of Santiago de Chile (USACH), Santiago, Chile
| | - María José Galotto
- Center of Innovation in Packaging (LABEN), Technology Faculty. CEDENNA (Center for the Development of Nanoscience and Nanotechnology), University of Santiago de Chile (USACH), Santiago, Chile
| |
Collapse
|
10
|
|
11
|
Affiliation(s)
- Diego David Pinzón Moreno
- Department of Materials Engineering, Engineering School of Lorena; University of São Paulo - LOM-EEL/USP; Polo Urbo Industrial, Gleba AI-6, s/n, CEP, 12602-810 Lorena São Paulo Brazil
| | - Clodoaldo Saron
- Department of Materials Engineering, Engineering School of Lorena; University of São Paulo - LOM-EEL/USP; Polo Urbo Industrial, Gleba AI-6, s/n, CEP, 12602-810 Lorena São Paulo Brazil
| |
Collapse
|