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Benkraled L, Zennaki A, Zair L, Arabeche K, Berrayah A, Barrera A, Bouberka Z, Maschke U. Effect of Plasticization/Annealing on Thermal, Dynamic Mechanical, and Rheological Properties of Poly(Lactic Acid). Polymers (Basel) 2024; 16:974. [PMID: 38611232 PMCID: PMC11013295 DOI: 10.3390/polym16070974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 03/14/2024] [Accepted: 03/23/2024] [Indexed: 04/14/2024] Open
Abstract
This study investigates the use of low molecular weight poly(ethylene glycol) (PEG) as a plasticizer for poly(lactic acid) (PLA). PLA/PEG blend films were prepared using the solvent casting method with varying mixing ratios. The films were analyzed using differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and dynamic rheological analysis. The results indicate that the addition of PEG as a plasticizer affects the thermal and mechanical properties of the PLA/PEG blend films. The study found that the glass transition and cold crystallization temperatures decreased with increasing PEG content up to 20 wt%, while the crystallinity and crystallization rate increased. The blends with up to 20 wt% PEG were miscible, but phase separation occurred when the plasticizer content was increased to 30 wt%. Subsequently, amorphous samples of neat PLA and PLA plasticized with 10 wt% of PEG underwent annealing at various temperatures (Ta = 80-120 °C) for durations ta of 1 and 24 h. The samples were then analyzed using DSC and DMA. The addition of PEG to PLA altered the content of α' and α crystalline forms compared to neat PLA at a given (Ta; ta) and favored the formation of a mixture of α' and α crystals. The crystallinity achieved upon annealing increased with increasing Ta or ta and with the incorporation of PEG.
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Affiliation(s)
- Lina Benkraled
- Laboratoire de Recherche sur les Macromolécules (LRM), Faculté des Sciences, Université Abou Bekr Belkaïd, BP 119, Tlemcen 13000, Algeria
| | - Assia Zennaki
- Laboratoire de Recherche sur les Macromolécules (LRM), Faculté des Sciences, Université Abou Bekr Belkaïd, BP 119, Tlemcen 13000, Algeria
| | - Latifa Zair
- Laboratoire de Recherche sur les Macromolécules (LRM), Faculté des Sciences, Université Abou Bekr Belkaïd, BP 119, Tlemcen 13000, Algeria
| | - Khadidja Arabeche
- Laboratoire de Recherche sur les Macromolécules (LRM), Faculté des Sciences, Université Abou Bekr Belkaïd, BP 119, Tlemcen 13000, Algeria
| | - Abdelkader Berrayah
- Laboratoire de Recherche sur les Macromolécules (LRM), Faculté des Sciences, Université Abou Bekr Belkaïd, BP 119, Tlemcen 13000, Algeria
| | - Ana Barrera
- Unité Matériaux et Transformations (UMET), UMR 8207, Université de Lille, CNRS, INRAE, Centrale Lille, 59000 Lille, France
| | - Zohra Bouberka
- Laboratoire Physico-Chimique des Matériaux, Catalyse et Environnement (LPCMCE), Université des Sciences et de la Technologie Mohammed Boudiaf d’Oran (USTO-MB), Oran 31000, Algeria
| | - Ulrich Maschke
- Unité Matériaux et Transformations (UMET), UMR 8207, Université de Lille, CNRS, INRAE, Centrale Lille, 59000 Lille, France
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Jenix Rino J, Suyambulingam I, Divakaran D, Sunesh NP, Singh MK, Vishnuvarthanan M, Sanjay MR, Siengchin S. Facile exfoliation and physicochemical characterization of Thespesia populnea plant leaves based bioplasticizer macromolecules reinforced with polylactic acid biofilms for packaging applications. Int J Biol Macromol 2024; 261:129771. [PMID: 38286386 DOI: 10.1016/j.ijbiomac.2024.129771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 01/22/2024] [Accepted: 01/24/2024] [Indexed: 01/31/2024]
Abstract
Plasticizers are active ingredients added to the polymer to increase its workability. Since synthetic plasticizer is not ecofriendly and toxic in nature, it is a real cause for concern. On this basis, our study focuses on plasticizer extraction from plant-based resources. In this research work, Thespesia populnea leaves are utilized for the isolation of biological macromolecules with a plasticizing effect for biofilm applications. This extraction process is done through solvent extraction, amination, slow pyrolysis, and surface catalysis process. The physico-chemical and microstructural characterization of novel plasticizer particles were studied for the first time. The lower crystallinity index and crystalline size obtained from X-ray diffraction is 50.08 % and 20.45 nm respectively. Energy dispersive spectroscopy, particle sizer analysis, atomic force microscopy, and scanning electron microscopy are used to assess surface morphology of this plasticizer. The thermogram and differential thermal analysis curves give the information about degradation behavior of plasticizers and their thermal stability. The glass transition temperature of the extracted plasticizer is 60.56 °C. The plasticizing effect of the plasticizer is studied through film fabrication of polylactic acid which was blended with the extracted plasticizer. The mechanical property of biofilm was improved with the addition of plasticizer. The elongation break percentage (for 5 % plasticizer 46.12 %) was increased compared to others with moderate tensile strength. However, the tensile and elongation modulus decreases with the increase of plasticizer content. The crystallinity of the PLA film was improved after the plasticization. The thermal stability also increased with 3 % addition of the plasticizer. The isolated plasticizer was soluble in water and its molecular weight ≈380.
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Affiliation(s)
- J Jenix Rino
- Department of Mechanical Engineering, Stella Mary's College of Engineering, Nagercoil, Tamilnadu 629202, India
| | - Indran Suyambulingam
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok 10800, Thailand.
| | - Divya Divakaran
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok 10800, Thailand
| | - Narayana Perumal Sunesh
- Department of Mechanical Engineering, Rohini College of Engineering and Technology, Palkulam, Kanyakumari, Tamil Nadu 629401, India
| | - Manoj Kumar Singh
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok 10800, Thailand
| | - M Vishnuvarthanan
- Department of Materials Science and Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - M R Sanjay
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok 10800, Thailand
| | - Suchart Siengchin
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok 10800, Thailand.
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Song L, Chi W, Hao Y, Ren J, Yang B, Cong F, Li Y, Yu L, Li X, Wang Y. Improving the properties of polylactic acid/polypropylene carbonate blends through cardanol-induced compatibility enhancement. Int J Biol Macromol 2024; 258:128886. [PMID: 38141698 DOI: 10.1016/j.ijbiomac.2023.128886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 12/15/2023] [Accepted: 12/17/2023] [Indexed: 12/25/2023]
Abstract
Cardanol (CD) is used as a reactive compatibilizer, and blended with polylactic acid (PLA) and polypropylene carbonate (PPC) resin (70/30(w/w)) to obtain a series of PLA/PPC/CD blends. The systematic study was conducted on the thermal properties, optical properties, rheological properties, mechanical properties, and microscopic morphology of the blend, by varying amounts of CD added to the blends. A detailed explanation and comprehensive analysis of the reaction mechanism between CD and PLA/PPC have been made. The study found that CD acts as a "bridge" between the PLA and PPC, forming the structure of a block copolymer (PLA-b-CD-b-PPC), and the copolymer can greatly improve the compatibility of PLA and PPC. When the amount of CD reaches 8 wt%, only one Tg is observed in the blend, simultaneously, PLA/PPC has already transitioned from a partially compatible system to a completely compatible system. At the same time, the addition of CD does not have any negative impact on the thermal stability of the PLA/PPC blend under processing temperature conditions, and the thermal stability of the PLA/PPC/CD blends can even be improved under extreme conditions. In addition, the addition of CD allows the PLA/PPC/CD blends to maintain a high light transmittance while reducing the opacity of the blend (the light transmittance remains above 92 %, and the opacity is reduced from 37 % to about 24 %), demonstrating excellent optical properties. Moreover, the elongation at break and impact strength of the PLA/PPC/CD blend both show a trend of first increasing and then decreasing with the increase of CD amount. When the CD amount varies within the range of 6- 8 wt%, the blends undergoes a brittle-ductile transition, and its toughness is greatly improved while the rigidity can also meet practical needs. When the amount of CD in the system increases to 12 wt%, the toughness of the blend reaches its peak, and its elongation at break and impact strength reach 513.24 % and 9211.5 J/m2 respectively (increased to 2442.84 % and 270.73 % of the PLA/PPC blend). Concurrently, the fracture surface of the blend exhibits large-scale plastic flow in the direction of the applied force, with marked shear yield phenomena, showing obvious characteristics of tough fracture.
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Affiliation(s)
- Lixin Song
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Weihan Chi
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Yongsheng Hao
- College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Jiannan Ren
- AVIC Shenyang Aircraft Corporation, Shenyang 110850, China
| | - Bing Yang
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Fei Cong
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Yongchao Li
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Lingxiao Yu
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Xianliang Li
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
| | - Yuanxia Wang
- Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China.
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Dhal MK, Madhu K, Banerjee A, Prasannavenkadesan V, Kumar A, Katiyar V. Polylactic acid/polycaprolactone/sawdust based biocomposites trays with enhanced compostability. Int J Biol Macromol 2023; 253:126977. [PMID: 37739287 DOI: 10.1016/j.ijbiomac.2023.126977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 09/12/2023] [Accepted: 09/16/2023] [Indexed: 09/24/2023]
Abstract
The major drawback associated with petroleum-based polymer products is pollution, leading to environmental hazards. Biodegradable polymers and biocomposites have the potential to play a major role in replacing the conventional polymers in specific applications on a case to case basis. In the current study, sawdust reinforced polylactic acid/polycaprolactone (PLA/PCL) biocomposites were developed using the melt extrusion technique. Primary processed fine sawdust was reinforced with PLA/PCL blend in a mini twin screw extruder in different weight fractions (10 %, 20 %, 30 %, and 40 %). The developed biocomposites were subjected to tensile testing, which indicated that the increased weight percent of sawdust reduced the tensile strength. The materials were further characterized, using sophisticated analytical such as field emission scanning electron microscopy, differential scanning calorimetry and thermogravimetry analysis. The composite containing 30 % sawdust concentration presented the best results with tensile strength of 26.5 MPa, tensile strain of 4.4 % and onset degradation temperature of 320 °C. The same formulation was successfully scaled up to the pilot level of 5 kg batch. It was further subjected to secondary processing to produce market ready cutlery items. Biodegradability studies in simulated composting environments revealed that addition of sawdust drastically reduces the lag phase in degradation and total degradation may be obtained in approximately 90 days. Based on the investigation, there is optimism that the PLA/PCL composites, blended with sawdust may ensure commercial application of sustainable polymer blends at affordable prices.
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Affiliation(s)
- Manoj Kumar Dhal
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India; Centre for Sustainable Polymers, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Kshitij Madhu
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India; Centre for Sustainable Polymers, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Arnab Banerjee
- Centre for Sustainable Polymers, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India; Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | | | - Amit Kumar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India; Centre for Sustainable Polymers, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Vimal Katiyar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India; Centre for Sustainable Polymers, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India.
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Arifin HR, Utaminingsih F, Djali M, Nurhadi B, Lembong E, Marta H. The Role of Virgin Coconut Oil in Corn Starch/NCC-Based Nanocomposite Film Matrix: Physical, Mechanical, and Water Vapor Transmission Characteristics. Polymers (Basel) 2023; 15:3239. [PMID: 37571131 PMCID: PMC10422339 DOI: 10.3390/polym15153239] [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: 06/06/2023] [Revised: 07/25/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023] Open
Abstract
Corn starch-based nanocomposite films usually have low moisture barrier properties. Adding virgin coconut oil (VCO) as a hydrophobic component can improve the nanocomposite film's characteristics, especially the film's permeability and elongation properties. This study aimed to determine the role of VCO with various concentrations (0, 3, 5 wt%) on the physical, mechanical, and water vapor transmission characteristics of corn starch/NCC-based nanocomposite films. Adding 3% VCO to the film showed the lowest WVTR value by 4.721 g/m2.h. At the same time, the value of tensile strength was 4.243 MPa, elongation 69.28%, modulus of elasticity 0.062 MPa, thickness 0.219 mm, lightness 98.77, and water solubility 40.51%. However, adding 5 wt% VCO to the film increased the film's elongation properties by 83.87%. The SEM test showed that adding VCO formed a finer structure with pores in several areas. The FTIR films showed that adding VCO caused a slightly higher absorption peak shift at the O-H groups and new absorption peaks at wave numbers 1741 cm-1 and 1742 cm-1. The results of this study may provide opportunities for the development of nanocomposite films as biodegradable packaging in the future.
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Affiliation(s)
- Heni Radiani Arifin
- Departement of Food Industrial Technology, Faculty of Agro-Industrial Technology, Universitas Padjadjaran, Sumedang 45363, Indonesia; (F.U.); (M.D.); (B.N.); (E.L.); (H.M.)
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Darie-Niță RN, Irimia A, Doroftei F, Stefan LM, Iwanczuk A, Trusz A. Bioactive and Physico-Chemical Assessment of Innovative Poly(lactic acid)-Based Biocomposites Containing Sage, Coconut Oil, and Modified Nanoclay. Int J Mol Sci 2023; 24:ijms24043646. [PMID: 36835080 PMCID: PMC9962215 DOI: 10.3390/ijms24043646] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/05/2023] [Accepted: 02/08/2023] [Indexed: 02/15/2023] Open
Abstract
The bioactivity of the versatile biodegradable biopolymer poly(lactic acid) (PLA) can be obtained by combining it with natural or synthetic compounds. This paper deals with the preparation of bioactive formulations involving the melt processing of PLA loaded with a medicinal plant (sage) and an edible oil (coconut oil), together with an organomodifed montmorillonite nanoclay, and an assessment of the resulting structural, surface, morphological, mechanical, and biological properties of the biocomposites. By modulating the components, the prepared biocomposites show flexibility, both antioxidant and antimicrobial activity, as well as a high degree of cytocompatibility, being capable to induce the cell adherence and proliferation on their surface. Overall, the obtained results suggest that the developed PLA-based biocomposites could potentially be used as bioactive materials in medical applications.
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Affiliation(s)
- Raluca Nicoleta Darie-Niță
- “Petru Poni” Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487 Iasi, Romania
- Correspondence:
| | - Anamaria Irimia
- “Petru Poni” Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487 Iasi, Romania
| | - Florica Doroftei
- “Petru Poni” Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487 Iasi, Romania
| | - Laura Mihaela Stefan
- National Institute of Research and Development for Biological Sciences, 296 Splaiul Independentei, 060031 Bucharest, Romania
| | - Andrzej Iwanczuk
- Faculty of Environmental Engineering, Wroclaw University of Science and Technology, Wybrzeze Wyspiańskiego 27, 50-370 Wroclaw, Poland
| | - Agnieszka Trusz
- Faculty of Environmental Engineering, Wroclaw University of Science and Technology, Wybrzeze Wyspiańskiego 27, 50-370 Wroclaw, Poland
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Darie-Niță RN, Irimia A, Grigoraș VC, Mustață F, Tudorachi N, Râpă M, Ludwiczak J, Iwanczuk A. Evaluation of Natural and Modified Castor Oil Incorporation on the Melt Processing and Physico-Chemical Properties of Polylactic Acid. Polymers (Basel) 2022; 14:polym14173608. [PMID: 36080683 PMCID: PMC9460240 DOI: 10.3390/polym14173608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 08/26/2022] [Accepted: 08/28/2022] [Indexed: 11/16/2022] Open
Abstract
Bio-based plasticizers derived from renewable resources represent a sustainable replacement for petrochemical-based plasticizers. Vegetable oils are widely available, non-toxic and biodegradable, resistant to evaporation, mostly colorless and stable to light and heat, and are a suitable alternative for phthalate plasticizers. Plasticized poly(lactic acid) (PLA) materials containing 5 wt%, 10 wt%, 15 wt% and 20 wt% natural castor oil (R) were prepared by melt blending to improve the ductility of PLA. Three castor oil adducts with maleic anhydride (MA), methyl nadic anhydride (methyl-5-norbornene-2,3-dicarboxylic anhydride) (NA) and hexahydro-4-methylphthalic anhydride (HA), previously synthesized, were incorporated in a concentration of 15 wt% each in PLA and compared with PLA plasticized with natural R. The physico-chemical properties of PLA/R blends were investigated by means of processability, chemical structure, surface wettability, mechanical, rheological and thermal characteristics. The addition of natural and modified R significantly improved the melt processing by decreasing the melt viscosity by ~95%, increased the surface hydrophobicity, enhanced the flexibility by ~14 times in the case of PLA/20R blend and ~11 times in the case of PLA/15R-MA blend as compared with neat PLA. The TG/DTG results showed that the natural R used up to 20 wt% could significantly improve the thermal stability of PLA, similar to the maleic anhydride-modified R. Based on the obtained results, up to 20 wt% natural R and 15 wt% MA-, HA- or NA-modified R might be used as environmentally friendly plasticizers that can improve the overall properties of PLA, depending on the intended food packaging applications.
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Affiliation(s)
- Raluca Nicoleta Darie-Niță
- Physical Chemistry of Polymers Department, Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Anamaria Irimia
- Physical Chemistry of Polymers Department, Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Vasile Cristian Grigoraș
- Physical Chemistry of Polymers Department, Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Fănică Mustață
- Physical Chemistry of Polymers Department, Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Niță Tudorachi
- Natural Polymers, Bioactive and Biocompatible Materials Department, Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Maria Râpă
- Faculty of Materials Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
- Correspondence:
| | - Joanna Ludwiczak
- Faculty of Environmental Engineering, University of Science and Technology, 50-013 Wrocław, Poland
| | - Andrzej Iwanczuk
- Faculty of Environmental Engineering, University of Science and Technology, 50-013 Wrocław, Poland
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Sahoo SD, Ravikumar A, Prasad E. PVA–Polystyrene-Based Polymer Films with Water-Induced Shape-Memory Effect. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Akhil Ravikumar
- Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras (IITM), Chennai 600036, India
| | - Edamana Prasad
- Department of Chemistry, Indian Institute of Technology Madras (IITM), Chennai 600 036, India
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Chen Y, Tang T, Ayranci C. Moisture‐induced anti‐plasticization of polylactic acid: Experiments and modeling. J Appl Polym Sci 2022. [DOI: 10.1002/app.52369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yu Chen
- Department of Mechanical Engineering University of Alberta Edmonton Alberta Canada
| | - Tian Tang
- Department of Mechanical Engineering University of Alberta Edmonton Alberta Canada
| | - Cagri Ayranci
- Department of Mechanical Engineering University of Alberta Edmonton Alberta Canada
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Carpintero M, Marcet I, Rendueles M, Díaz M. Egg Yolk Oil as a Plasticizer for Polylactic Acid Films. MEMBRANES 2021; 12:membranes12010046. [PMID: 35054572 PMCID: PMC8781037 DOI: 10.3390/membranes12010046] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/23/2021] [Accepted: 12/28/2021] [Indexed: 11/16/2022]
Abstract
Polylactic acid (PLA) is known to be one of the most extensively used biodegradable thermoplastic polyesters, with the potential to replace conventional petroleum-based packaging materials; however, the low flexibility of films prepared using PLA has limited the applications of this biopolymer. In this study, in order to improve the mechanical properties of PLA films and to provide them with antioxidant properties, egg yolk oil was used as a biobased plasticizer. For this purpose, PLA films with increasing concentrations of egg yolk oil were prepared and the effects of this oil on the light transmission, transparency, colour, water vapour permeability, solubility, antioxidant activity and mechanical properties of the films were characterized. In addition, electron microscopy of the structure of the transverse section of the films was also performed. Results showed that the formulations with higher concentrations of egg yolk oil increased the films’ elasticity, and their light barrier and antioxidant properties. Finally, in order to test the films as a packaging material for food applications, extra virgin olive oil and resveratrol, both photosensitive compounds, were packed and exposed to ambient light. Overall, the results show the potential of egg yolk oil as an environmentally friendly plasticizer that can improve the flexibility of PLA films and provide them with additional photoprotective properties.
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Ekielski A, Żelaziński T, Mishra PK, Skudlarski J. Properties of Biocomposites Produced with Thermoplastic Starch and Digestate: Physicochemical and Mechanical Characteristics. MATERIALS (BASEL, SWITZERLAND) 2021; 14:6092. [PMID: 34683684 PMCID: PMC8537029 DOI: 10.3390/ma14206092] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 10/01/2021] [Accepted: 10/11/2021] [Indexed: 11/16/2022]
Abstract
This paper presents the results of a study on the influence of the addition of digestate (DG) sludge from an agricultural biogas plant on the mechanical properties of the coating obtained from thermoplastic starch (TPS). The dried, fragmented digestate, some of which had previously undergone ultrasound treatment, is used in the study. Biocomposites are produced by the pouring method using Teflon moulds as matrices. The physicomechanical study included the determination of the basic parameters of the materials obtained. Strength parameters, the contact angle, thermogravimetric properties (TGA), colour and colour difference and moisture absorption are determined. Photographs of the surface of the samples are taken with a scanning electron microscope (SEM) as well. It is found that the addition of the digestate has an advantageous effect on improving the physical and mechanical parameters. In general, samples with digestate also have a higher strength compared to the pure TPS material. The highest tensile strength and Young's modulus are found in samples with the 14 wt% addition of ultrasound-treated digestate. On the basis of this study, it can be concluded that the addition of digestate is a promising approach for the production of TPS biocomposites with superior mechanical properties.
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Affiliation(s)
- Adam Ekielski
- Department of Production Engineering, Institute of Mechanical Engineering, Warsaw University of Life Sciences (SGGW), Nowoursynowska 164, 02-787 Warsaw, Poland; (A.E.); (J.S.)
| | - Tomasz Żelaziński
- Department of Production Engineering, Institute of Mechanical Engineering, Warsaw University of Life Sciences (SGGW), Nowoursynowska 164, 02-787 Warsaw, Poland; (A.E.); (J.S.)
| | - Pawan Kumar Mishra
- Faculty of Business and Economics, Mendel University in Brno, 61300 Brno, Czech Republic;
| | - Jacek Skudlarski
- Department of Production Engineering, Institute of Mechanical Engineering, Warsaw University of Life Sciences (SGGW), Nowoursynowska 164, 02-787 Warsaw, Poland; (A.E.); (J.S.)
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Ploypetchara T, Gohtani S. Effect of rice starch film blended with sugar (trehalose/allose) and oil (canola oil/coconut oil) on the physical properties and their interaction (Part II). J FOOD PROCESS PRES 2021. [DOI: 10.1111/jfpp.15795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thongkorn Ploypetchara
- Expert Center of Innovative Health Food Thailand Institute of Scientific and Technological Research 35 Mu 3 Technopolis Pathum Thani Thailand
| | - Shoichi Gohtani
- Department of Applied Biological Science Faculty of Agriculture Kagawa University Kita‐gun, Kagawa Japan
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Danko M, Mosnáčková K, Vykydalová A, Kleinová A, Puškárová A, Pangallo D, Bujdoš M, Mosnáček J. Properties and Degradation Performances of Biodegradable Poly(lactic acid)/Poly(3-hydroxybutyrate) Blends and Keratin Composites. Polymers (Basel) 2021; 13:polym13162693. [PMID: 34451232 PMCID: PMC8399615 DOI: 10.3390/polym13162693] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 07/28/2021] [Accepted: 08/09/2021] [Indexed: 01/24/2023] Open
Abstract
From environmental aspects, the recovery of keratin waste is one of the important needs and therefore also one of the current topics of many research groups. Here, the keratin hydrolysate after basic hydrolysis was used as a filler in plasticized polylactic acid/poly(3-hydroxybutyrate) blend under loading in the range of 1–20 wt%. The composites were characterized by infrared spectroscopy, and the effect of keratin on changes in molar masses of matrices during processing was investigated using gel permeation chromatography (GPC). Thermal properties of the composites were investigated using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The effect of keratin loading on the mechanical properties of composite was investigated by tensile test and dynamic mechanical thermal analysis. Hydrolytic degradation of matrices and composites was investigated by the determination of extractable product amounts, GPC, DSC and NMR. Finally, microbial growth and degradation were investigated. It was found that incorporation of keratin in plasticized PLA/PHB blend provides material with good thermal and mechanical properties and improved degradation under common environmental conditions, indicating its possible application in agriculture and/or packaging.
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Affiliation(s)
- Martin Danko
- Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia; (K.M.); (A.V.); (A.K.); (J.M.)
- Correspondence:
| | - Katarína Mosnáčková
- Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia; (K.M.); (A.V.); (A.K.); (J.M.)
| | - Anna Vykydalová
- Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia; (K.M.); (A.V.); (A.K.); (J.M.)
| | - Angela Kleinová
- Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia; (K.M.); (A.V.); (A.K.); (J.M.)
| | - Andrea Puškárová
- Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská cesta 21, 845 51 Bratislava, Slovakia; (A.P.); (D.P.)
| | - Domenico Pangallo
- Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská cesta 21, 845 51 Bratislava, Slovakia; (A.P.); (D.P.)
| | - Marek Bujdoš
- Faculty of Natural Sciences, Institute of Laboratory Research on Geomaterials, Comenius University in Bratislava, Mlynská dolina, 842 15 Bratislava, Slovakia;
| | - Jaroslav Mosnáček
- Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia; (K.M.); (A.V.); (A.K.); (J.M.)
- Centre for Advanced Materials Application, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11 Bratislava, Slovakia
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Sultan M, Elsayed H, Abdelhakim AEF, Taha G. Active packaging gelatin films based on chitosan/Arabic gum/coconut oil Pickering nano emulsions. J Appl Polym Sci 2021. [DOI: 10.1002/app.51442] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Maha Sultan
- Packaging Materials Department National Research Centre Cairo Egypt
| | - Hamed Elsayed
- Chemistry of Tanning Materials and Leather Technology Department National Research Centre Cairo Egypt
| | | | - Ghada Taha
- Pre‐treatment and Finishing of Cellulosic Fibers Department National Research Centre Cairo Egypt
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Żelaziński T. Properties of Biocomposites from Rapeseed Meal, Fruit Pomace and Microcrystalline Cellulose Made by Press Pressing: Mechanical and Physicochemical Characteristics. MATERIALS (BASEL, SWITZERLAND) 2021; 14:890. [PMID: 33668476 PMCID: PMC7918066 DOI: 10.3390/ma14040890] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 02/05/2021] [Accepted: 02/09/2021] [Indexed: 02/03/2023]
Abstract
This paper presents the results of research on biocomposites made of the mixture of post-extraction rapeseed meal, microcrystalline cellulose and various fruit pomace (chokeberry, blackcurrant, apple and raspberry pomace). The biocomposites were made in the process of mechanical thickening by means of a heated mould (die and stamp) which is located between two heating elements installed on a hydraulic press. The presented research combines mechanical engineering and material engineering issues. The physical and mechanical tests of obtained biocomposites included mechanical strength measurements, thermogravimetric analyses (TGA), colour change tests and scanning electron microscopic (SEM) tests of the internal structure after breaking the sample. In addition, Fourier transform infrared spectroscopy (FTIR) tests were carried out. Generally, the bend tests and Young's modulus were significantly increased, for example, biocomposites with an addition of chokeberry pomace had the flexural strength higher by approximately 25% in relation to the primary sample. Furthermore, it is interesting to note the increase of water contact angle of these biocomposites by 40% in relation to the primary sample. The research indicates the potential for using fruit pomace for the needs of biocomposite production.
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Affiliation(s)
- Tomasz Żelaziński
- Department of Production Engineering, Institute of Mechanical Engineering, Warsaw University of Life Sciences-SGGW, Nowoursynowska 164, 02-787 Warsaw, Poland
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Properties and Degradation of Novel Fully Biodegradable PLA/PHB Blends Filled with Keratin. Int J Mol Sci 2020; 21:ijms21249678. [PMID: 33353232 PMCID: PMC7766749 DOI: 10.3390/ijms21249678] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/14/2020] [Accepted: 12/15/2020] [Indexed: 12/25/2022] Open
Abstract
The utilization of keratin waste in new materials formulations can prevent its environmental disposal problem. Here, novel composites based on biodegradable blends consisting of poly(lactic acid) (PLA) and poly(3-hydroxybutyrate) (PHB), and filled with hydrolyzed keratin with loading from 1 to 20 wt % were prepared and their properties were investigated. Mechanical and viscoelastic properties were characterized by tensile test, dynamic mechanical thermal analysis (DMTA) and rheology measurements. The addition of acetyltributyl citrate (ATBC) significantly affected the mechanical properties of the materials. It was found that the filled PLA/PHB/ATBC composite at the highest keratin loading exhibited similar shear moduli compared to the un-plasticized blend as a result of the much stronger interactions between the keratin and polymer matrix compared to composites with lower keratin content. The differences in dynamic moduli for PLA/PHB/ATBC blend filled with keratin depended extensively on the keratin content while loss the factor values progressively decreased with keratin loading. Softening interactions between the keratin and polymer matrix resulted in lower glass transitions temperature and reduced polymer chain mobility. The addition of keratin did not affect the extent of degradation of the PLA/PHB blend during melt blending. Fast hydrolysis at 60 °C was observed for composites with all keratin loadings. The developed keratin-based composites possess properties comparable to commonly used thermoplastics applicable for example as packaging materials.
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Ploypetchara T, Gohtani S. Characteristics of rice starch film blended with sugar (trehalose/allose) and oil (canola oil/coconut oil): Part I - Filmogenic solution behavior and mechanical properties. J Food Sci 2020; 85:3372-3379. [PMID: 32949033 DOI: 10.1111/1750-3841.15455] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 08/16/2020] [Accepted: 08/25/2020] [Indexed: 12/18/2022]
Abstract
The concentrations effects of sugars (trehalose and allose) and oils (canola and coconut oil) on the characteristics of rice starch suspension and mechanical properties of rice starch film were studied. The samples were prepared using 3% (w/w) rice starch, with 10% or 30% (w/w) sugar (trehalose or allose) added and 10% or 30% (w/w) oil (canola or coconut). The droplet size of the film suspension increased with increasing oil concentration both in trehalose and allose, which blended with oil. The flow behavior of the film suspensions showed shear-thinning behavior as calculated by the Power Law model. The apparent viscosity tended to increase with the addition of sugar and oil. The breaking stress of the films blended with sugar and oil was less than that of control. On preparation day and after 7 days' storage, the breaking strain tended to increase more with the addition of coconut oil than with that of canola oil. However, breaking stress and breaking strain decreased after 28 days' storage. Adding sugar had correlation with mechanical properties whereas adding oil had correlation with film suspension characteristics, allowed the sugar and oil to interact and inhibited starch chain mobility due to concentration, sugar type, and oil type. PRACTICAL APPLICATION: Trehalose, allose, canola oil, and coconut oil could be used as a plasticizer in a starch edible/biodegradable film system. The preparation process of filmogenic solution was depended on the combination of sugar and oil that could change the flow behavior and affected the mechanical properties of the edible film. The sugar and oil might improve the mechanical properties of the film by a hydroxyl group of sugar and lubricating properties of the oil.
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Affiliation(s)
- Thongkorn Ploypetchara
- Expert Center of Innovative Health Food, Thailand Institute of Scientific and Technological Research, 35 Mu 3 Technopolis, Tambon Khlong Ha, Amphoe Khlong Luang, Pathum Thani, 12120, Thailand
| | - Shoichi Gohtani
- Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, 2393 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0795, Japan
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De La Rosa‐Ramírez H, Aldas M, Ferri JM, López‐Martínez J, Samper MD. Modification of poly (lactic acid) through the incorporation of gum rosin and gum rosin derivative: Mechanical performance and hydrophobicity. J Appl Polym Sci 2020. [DOI: 10.1002/app.49346] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
| | - Miguel Aldas
- Instituto de Tecnología de Materiales (ITM), Universitat Politècnica de València (UPV) Alicante Spain
- Departamento de Ciencia de Alimentos y Biotecnología, Facultad de Ingeniería Química y AgroindustriaEscuela Politécnica Nacional Quito Ecuador
| | - José Miguel Ferri
- Instituto de Tecnología de Materiales (ITM), Universitat Politècnica de València (UPV) Alicante Spain
| | - Juan López‐Martínez
- Instituto de Tecnología de Materiales (ITM), Universitat Politècnica de València (UPV) Alicante Spain
| | - María Dolores Samper
- Instituto de Tecnología de Materiales (ITM), Universitat Politècnica de València (UPV) Alicante Spain
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20
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Valorization of coal fired-fly ash for potential heavy metal removal from the single and multi-contaminated system. Heliyon 2019; 5:e02562. [PMID: 31667403 PMCID: PMC6812189 DOI: 10.1016/j.heliyon.2019.e02562] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 06/01/2019] [Accepted: 09/30/2019] [Indexed: 01/21/2023] Open
Abstract
In this study, adsorption of three different heavy metals i.e. cadmium (Cd (II)), copper (Cu (II)) and nickel (Ni (II)) was carried out in single and multi-contaminated system using coal-fired fly ash (CFFA). Initially, for the single contaminated system, various physical process parameters were selected for optimization by deploying Box–Behnken design of experiments. Further, the evaluation of CFFA for removal of heavy metals in a multi-component system from aqueous solution was performed by employing Plackett-Burman design of experiments with all the three heavy metals at two different levels by varying their initial concentration (10–50 mg L−1). In both the aforementioned cases, CFFA showed its great potential for heavy metal removal, i.e. single and multi-component system and followed the order: Cu (II) > Ni (II) > Cd (II). Further, FTIR study confirmed the involvement of amide, aldehyde, alkoxy, alkanes, and alkene groups for heavy metal adsorption by CFFA.
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21
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Ageing of plasticized poly(lactic acid)/poly(3-hydroxybutyrate)/carbon black mulching films during one season of sweet pepper production. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.02.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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22
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de Macedo JRN, dos Santos DJ, dos Santos Rosa D. Poly(lactic acid)-thermoplastic starch-cotton composites: Starch-compatibilizing effects and composite biodegradability. J Appl Polym Sci 2019. [DOI: 10.1002/app.47490] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
| | | | - Derval dos Santos Rosa
- Universidade Federal do ABC; Avenida dos Estados 5001, Santo André, 09210-971 São Paulo Brazil
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Pal AK, Bhasney SM, Bhagabati P, Katiyar V. Effect of Dicumyl Peroxide on a Poly(lactic acid) (PLA)/Poly(butylene succinate) (PBS)/Functionalized Chitosan-Based Nanobiocomposite for Packaging: A Reactive Extrusion Study. ACS OMEGA 2018; 3:13298-13312. [PMID: 31458046 PMCID: PMC6644597 DOI: 10.1021/acsomega.8b00907] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 09/10/2018] [Indexed: 06/10/2023]
Abstract
Nanobiocomposites with balanced mechanical characteristics are fabricated from poly(lactic acid) (PLA)/poly(butylene succinate) (PBS)blend at a weight ratio of 80/20 in association with varying concentrations of functionalized chitosan (FCH) through reactive extrusion at a temperature of 185 °C. The combined effect of FCH and dicumyl peroxide (DCP) showed insignificant change in tensile strength with a remarkable increase in % elongation at break (∼45%) values. Addition of DCP also caused increase in the molecular weight (M w ∼ 22%) of the PLA/PBS/1DFCH nanobiocomposite, which is attributed to the cross-linking/branching effect of FCH on the polymers. The interfacial polymer-filler adhesion is also improved, which is observed from the field-emission scanning electron microscopy images of PLA/PBS/1DFCH. For PLA/PBS/1DFCH, the crystallization rate and nucleation density of PLA are increased because of cross-linked/branched structures are developed, which acted as nucleating sites. Therefore, the present work facilitates a simple extrusion processing with a combination of balanced thermal and mechanical properties, improved hydrophobicity (∼27%), and UV-C-blocking efficiency, which draw the possibility for the utilization of the ecofriendly nanobiocomposite in the packing of UV-sensitive materials on a commercial level.
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Selling GW, Hojilla-Evangelista M, Hay WT, Utt KD, Grose GD. Preparation and Properties of Solution Cast Films From Pennycress Protein Isolate. J AM OIL CHEM SOC 2018. [DOI: 10.1002/aocs.12034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Gordon W. Selling
- Plant Polymer Research Unit, National Center for Agricultural Utilization Research (NCAUR); USDA Agricultural Research Service (ARS), 1815 N. University St; Peoria IL 61604 USA
| | - Mila Hojilla-Evangelista
- Plant Polymer Research Unit, National Center for Agricultural Utilization Research (NCAUR); USDA Agricultural Research Service (ARS), 1815 N. University St; Peoria IL 61604 USA
| | - William T. Hay
- Plant Polymer Research Unit, National Center for Agricultural Utilization Research (NCAUR); USDA Agricultural Research Service (ARS), 1815 N. University St; Peoria IL 61604 USA
| | - Kelly D. Utt
- Plant Polymer Research Unit, National Center for Agricultural Utilization Research (NCAUR); USDA Agricultural Research Service (ARS), 1815 N. University St; Peoria IL 61604 USA
| | - Gary D. Grose
- Plant Polymer Research Unit, National Center for Agricultural Utilization Research (NCAUR); USDA Agricultural Research Service (ARS), 1815 N. University St; Peoria IL 61604 USA
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Patwa R, Kumar A, Katiyar V. Effect of silk nano-disc dispersion on mechanical, thermal, and barrier properties of poly(lactic acid) based bionanocomposites. J Appl Polym Sci 2018. [DOI: 10.1002/app.46671] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Rahul Patwa
- Department of Chemical Engineering; Indian Institute of technology Guwahati; Guwahati Assam 781039 India
| | - Amit Kumar
- Department of Chemical Engineering; Indian Institute of technology Guwahati; Guwahati Assam 781039 India
| | - Vimal Katiyar
- Department of Chemical Engineering; Indian Institute of technology Guwahati; Guwahati Assam 781039 India
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26
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Kinetic modelling of thermal degradation and non-isothermal crystallization of silk nano-discs reinforced poly (lactic acid) bionanocomposites. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2434-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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27
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Influence of linear and branched amine functionalization in mesoporous silica on the thermal, mechanical and barrier properties of sustainable poly(lactic acid) biocomposite films. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.06.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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28
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Feng Y, Peng C, Li Y, Hu J. Enhanced Dielectric and Mechanical Properties of Ternary Composites via Plasticizer-Induced Dense Interfaces. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1111. [PMID: 29966239 PMCID: PMC6073615 DOI: 10.3390/ma11071111] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 06/22/2018] [Accepted: 06/26/2018] [Indexed: 11/16/2022]
Abstract
High overall performance, including high dielectric constant, low loss, high breakdown strength, fine flexibility, and strong tensile properties, is difficult to achieve simultaneously in polymer nanocomposites. In our prior work, we modified the surfaces of alpha-SiC nanoparticles and chemically cross-linked the polymeric matrix to simultaneously promote the dielectric and mechanical properties of composites. In this work, a novel strategy of high-temperature plastification towards a polymeric matrix has been proposed to fabricate ternary nanocomposites with balanced dielectric and mechanical characteristics by the solution cast method in order to reduce costs and simplify steps during large-scale preparation. Poly(vinylidene fluoride-chlorotrifluoroethylene) with inner double bonds as matrix, unfunctionalized alpha-SiC nanoparticles (NPs) as filler, and dibutyl phthalate (DBP) as plasticizer were employed. By introducing DBP and high-temperature treatment, the dispersion of NPs and the degree of compactness of the interface regions were both improved due to the reduced cohesion of the fluoropolymer, resulting in an increase in the dielectric constant (by 30%) and breakdown strength (by 57%) as well as the lowering of loss (by 30%) and conductivity (by 16%) in nanocomposites. Moreover, high-temperature plastification contributed to the promotion of flexible and tensile properties. This work might open the door to large-scale fabrication of nanocomposite dielectrics with high overall properties through the cooperation of the plasticizer and high temperature.
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Affiliation(s)
- Yefeng Feng
- School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China.
| | - Cheng Peng
- School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China.
| | - Yandong Li
- School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China.
| | - Jianbing Hu
- School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China.
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29
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Patwa R, Kumar A, Katiyar V. Crystallization kinetics, morphology, and hydrolytic degradation of novel bio-based poly(lactic acid)/crystalline silk nano-discs nanobiocomposites. J Appl Polym Sci 2018. [DOI: 10.1002/app.46590] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Rahul Patwa
- Department of Chemical Engineering; Indian Institute of Technology Guwahati; Guwahati, Assam 781039 India
| | - Amit Kumar
- Department of Chemical Engineering; Indian Institute of Technology Guwahati; Guwahati, Assam 781039 India
| | - Vimal Katiyar
- Department of Chemical Engineering; Indian Institute of Technology Guwahati; Guwahati, Assam 781039 India
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