1
|
Sharma S, Asolekar SR, Thakur VK, Asokan P. Valorization of cellulosic fiber derived from waste biomass of constructed wetland as a potential reinforcement in polymeric composites: A technological approach to achieve circular economy. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 340:117850. [PMID: 37105106 DOI: 10.1016/j.jenvman.2023.117850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 03/27/2023] [Accepted: 03/29/2023] [Indexed: 05/12/2023]
Abstract
This study establishes the suitability of cellulosic fibers derived from Canna indica waste biomass for utilization as a reinforcement in natural fiber polymeric composites. The waste biomass was harvested from constructed wetlands engaged in the treatment of municipal wastewater from a gated community. The extracted Canna indica (CI) fibers were studied for their physicochemical, mechanical, structural, crystallographic, and thermal characteristics and proposed as a potential alternative to synthetic fiber. The CI fibers contained a relatively higher amount of cellulose (60 wt%) and a low wax fraction (0.5 wt%) - which is advantageous for its gainful utilization as a reinforcement. The CI fibers were thermally stable up to 237 °C and have an average fiber length, diameter, and density of 4.3 mm, 842 μm, and 0.75 g/cm3, respectively. The mean maximum tensile strength and Young's modulus were found to be 113 ± 6.82 MPa and 0.8 ± 7.91 GPa, respectively. The nano-indentation test displayed the nano hardness and modulus as 0.3 ± 0.6 GPa and 1.62 ± 0.2 GPa, respectively. The crystallographic properties of CI fibers consisted of an 87.45% crystallinity index and 3.2 nm crystallite size. The morphological attributes of CI fibers showed rough surfaces and shallow cavities on the surfaces of the fibers suggesting the suitability for its utilization as a reinforcement. It is argued that this technological approach can potentially achieve circular economy through valorization of Canna indica biomass harvested from natural wastewater treatment plants.
Collapse
Affiliation(s)
- Shruti Sharma
- Environmental Science and Engineering Department, Indian Institute of Technology Bombay, Mumbai, 400076, India.
| | - Shyam R Asolekar
- Environmental Science and Engineering Department, Indian Institute of Technology Bombay, Mumbai, 400076, India.
| | - Vijay Kumar Thakur
- Biorefining and Advanced Materials Research Centre, Scotland's Rural College (SRUC), Kings Buildings, West Mains Road, Edinburgh, EH9 3JG, UK; School of Engineering, University of Petroleum & Energy Studies (UPES), Dehradun, 248007, Uttarakhand, India.
| | - P Asokan
- Green Engineered Materials and Additive Manufacturing Department, CSIR-Advanced Materials and Processes, Research Institute (AMPRI), Bhopal, 462026, India.
| |
Collapse
|
2
|
Dalmis R. Description of a new cellulosic natural fiber extracted from Helianthus tuberosus L. as a composite reinforcement material. PHYSIOLOGIA PLANTARUM 2023; 175:e13960. [PMID: 37339003 DOI: 10.1111/ppl.13960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 05/31/2023] [Accepted: 06/18/2023] [Indexed: 06/22/2023]
Abstract
Natural fiber-reinforced composites are generally known as eco-friendly, long-lasting, and recyclable materials. This study characterizes cellulosic Helianthus tuberosus L. fiber for polymer-based green composites for the first time. Helianthus tuberosus L. fiber has many advantages as a reinforcement material in polymer-based composites. For example, the high roughness of the fiber surface increases the locking into the composite body. One of the most critical advantages is its high thermal stability temperature of 247.3°C. Other advantages of the Helianthus tuberosus L. fiber are high cellulose content, high crystallinity, and high tensile strength. The hollow fiber structure allows its use in insulation materials. Finally, the high cellulose content of 62.65% supports its usage in various industries, including paper and paperboard manufacturing.
Collapse
Affiliation(s)
- Ramazan Dalmis
- Department of Metallurgical and Materials Engineering, Dokuz Eylul University, Izmir, Turkey
| |
Collapse
|
3
|
Jhang J, Cheng C, Huang C, Chen Y, Lin J, Lou C. Application of polyhexamethylene guanidine hydrochloride to polylactic acid/polyphenylene block copolymer antibacterial composite membranes: Manufacturing technique and property evaluations. J Appl Polym Sci 2022. [DOI: 10.1002/app.52504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Jia‐Ci Jhang
- Department of Textiles and Clothing Fu Jen Catholic University New Taipei Taiwan
| | - Chiao‐Chi Cheng
- Laboratory of Fiber Application and Manufacturing, Department of Fiber and Composite Materials Feng Chia University Taichung Taiwan
| | - Chen‐Hung Huang
- Department of Aerospace and Systems Engineering Feng Chia University Taichung City Taiwan
| | - Yueh‐Sheng Chen
- School of Chinese Medicine China Medical University Taichung Taiwan
| | - Jia‐Horng Lin
- Laboratory of Fiber Application and Manufacturing, Department of Fiber and Composite Materials Feng Chia University Taichung Taiwan
- School of Chinese Medicine China Medical University Taichung Taiwan
- College of Textile and Clothing Qingdao University Qingdao Shangdong China
- Fujian Key Laboratory of Novel Functional Fibers and Materials Minjiang University Fuzhou China
- Advanced Healthcare and Protective Technology Research Center Qingdao University Qingdao Shangdong China
| | - Ching‐Wen Lou
- College of Textile and Clothing Qingdao University Qingdao Shangdong China
- Fujian Key Laboratory of Novel Functional Fibers and Materials Minjiang University Fuzhou China
- Advanced Healthcare and Protective Technology Research Center Qingdao University Qingdao Shangdong China
- Feng Chia University Taichung Taiwan
- Innovation Platform of Intelligent and Energy‐Saving Textiles, School of Textiles Tianjin Polytechnic University Tianjin China
| |
Collapse
|
4
|
Rodríguez LJ, Álvarez‐Láinez ML, Orrego CE. Optimization of processing conditions and mechanical properties of banana fiber‐reinforced polylactic acid/high‐density polyethylene biocomposites. J Appl Polym Sci 2022. [DOI: 10.1002/app.51501] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- L. Joana Rodríguez
- Department of Industrial Engineering Universidad Nacional of Colombia Manizales Colombia
| | | | - Carlos E. Orrego
- Instituto de Biotecnología y Agroindustria, Departamento de Física y Química Universidad Nacional de Colombia Manizales Caldas Colombia
| |
Collapse
|
5
|
Siddiqui MN, Redhwi HH, Tsagkalias I, Vouvoudi EC, Achilias DS. Development of Bio-Composites with Enhanced Antioxidant Activity Based on Poly(lactic acid) with Thymol, Carvacrol, Limonene, or Cinnamaldehyde for Active Food Packaging. Polymers (Basel) 2021; 13:polym13213652. [PMID: 34771206 PMCID: PMC8588526 DOI: 10.3390/polym13213652] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 10/10/2021] [Accepted: 10/21/2021] [Indexed: 01/05/2023] Open
Abstract
The new trend in food packaging films is to use biodegradable or bio-based polymers, such as poly(lactic acid), PLA with additives such as thymol, carvacrol, limonene or cinnamaldehyde coming from natural resources (i.e., thyme, oregano, citrus fruits and cinnamon) in order to extent foodstuff shelf-life and improve consumers’ safety. Single, triple and quadruple blends of these active compounds in PLA were prepared and studied using the solvent-casting technique. The successful incorporation of the active ingredients into the polymer matrix was verified by FTIR spectroscopy. XRD and DSC data revealed that the crystallinity of PLA was not significantly affected. However, the Tg of the polymer decreased, verifying the plasticization effect of all additives. Multicomponent mixtures resulted in more intense plasticization. Cinnamaldehyde was found to play a catalytic role in the thermal degradation of PLA shifting curves to slightly lower temperatures. Release of thymol or carvacrol from the composites takes place at low rates at temperatures below 100 °C. A combined diffusion-model was found to simulate the experimental release profiles very well. Higher antioxidant activity was noticed when carvacrol was added, followed by thymol and then cinnamaldehyde and limonene. From the triple-component composites, higher antioxidant activity measured in the materials with thymol, carvacrol and cinnamaldehyde.
Collapse
Affiliation(s)
- Mohammad Nahid Siddiqui
- Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
| | - Halim Hamid Redhwi
- Chemical Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
| | - Ioannis Tsagkalias
- Lab of Polymer and Color Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.T.); (E.C.V.)
| | - Evangelia C. Vouvoudi
- Lab of Polymer and Color Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.T.); (E.C.V.)
| | - Dimitris S. Achilias
- Lab of Polymer and Color Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.T.); (E.C.V.)
- Correspondence: ; Tel.: +30-2310-997822
| |
Collapse
|
6
|
Mendes JF, Norcino LB, Martins HH, Manrich A, Otoni CG, Carvalho EEN, Piccolli RH, Oliveira JE, Pinheiro ACM, Mattoso LHC. Development of quaternary nanocomposites made up of cassava starch, cocoa butter, lemongrass essential oil nanoemulsion, and brewery spent grain fibers. J Food Sci 2021; 86:1979-1996. [PMID: 33822378 DOI: 10.1111/1750-3841.15689] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 01/26/2021] [Accepted: 02/18/2021] [Indexed: 11/28/2022]
Abstract
We report on production of novel quaternary nanocomposite films based on thermoplastic starch (TPS, 8% w/v) derived from cassava, cocoa butter, (CB, 30% wt.%), and lemongrass essential oil (LEO, 1:1) nanoemulsions reinforced with different concentrations of brewery spent grain (BSG, 5 or 10 wt.%) fibers, by continuous casting. The chemical composition, the morphological, thermal, mechanical properties, film barrier, biodegradability in the vegetable compound, in addition to the application in chocolates, have been widely studied. The addition of CB, LEO, and BSG caused relevant changes in the starch-based films, such as increased extensibility (from 2.4-BSG5 to 9.4%-BSG10) and improved barrier to moisture (2.9 and 2.4 g.mm.kPa-1 .h-1 .m-2 ). Contrastingly, the thermal stability of the starch film was slightly decreased. The biodegradability of the herein developed quaternary nanocomposite films was the same as that of TPS films, eliminating concerns on the supplementation with active ingredients that are expected to have some biocidal effect. Despite checking antimicrobial activity only by contact under the biocomposites, chocolates packed with the films were well accepted by consumers, especially the samples of white chocolate stored in the BSG5 biocomposite. Overall, this new approach towards quaternary active, biodegradable films produced in a pilot-scale lamination unit was successful in either improving or at least maintaining the essential properties of TPS-based films for food packaging applications, while providing them with unique features and functionalities. PRACTICAL APPLICATION: This contribution relates to new approach toward quaternary films produced in a pilot-scale lamination unit. It relates to sustainability as it is both biodegradable and based on plant biomass, as well as produced via a clean, through high-yield process. The four components of the edible films we developed provide it with good in properties performance, as both a passive barrier (i.e. purely physical), and active, related to the sensory attributes of food, essential to be applied in food packaging. The valorization of a BSG also adds to the relevance of our contribution within the circular bioeconomy framework.
Collapse
Affiliation(s)
- Juliana Farinassi Mendes
- Food Department, Graduate Program in Food Sciences, Federal University of Lavras, Lavras, Minas Gerais, Brazil
| | - Laís Bruno Norcino
- Forest Sciences Department, Graduate Program in Biomaterials Engineering, Federal University of Lavras, Lavras, Minas Gerais, Brazil
| | - Heloísa Helena Martins
- Food Department, Graduate Program in Food Sciences, Federal University of Lavras, Lavras, Minas Gerais, Brazil
| | - Anny Manrich
- National Laboratory of Nanotechnology for Agriculture (LNNA), Embrapa Instrumentation, São Carlos, São Paulo, Brazil
| | - Caio Gomide Otoni
- Department of Materials Engineering (DEMa), Federal University of São Carlos (UFSCar), São Carlos, São Paulo, Brazil
| | | | | | | | | | | |
Collapse
|
7
|
Kaur G, Moudgil R, Shamim M, Gupta VK, Banerjee B. Camphor sulfonic acid catalyzed a simple, facile, and general method for the synthesis of 2-arylbenzothiazoles, 2-arylbenzimidazoles, and 3H-spiro[benzo[d]thiazole-2,3′-indolin]-2′-ones at room temperature. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2020.1870043] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Gurpreet Kaur
- Department of Chemistry, Indus International University, Una, India
| | - Radha Moudgil
- Department of Chemistry, Indus International University, Una, India
| | - Mussarat Shamim
- Department of Chemistry, Indus International University, Una, India
| | - Vivek Kumar Gupta
- Post-Graduate Department of Physics, University of Jammu, Tawi, India
| | - Bubun Banerjee
- Department of Chemistry, Indus International University, Una, India
| |
Collapse
|
8
|
Development of active agents filled polylactic acid films for food packaging application. Int J Biol Macromol 2020; 163:1451-1457. [DOI: 10.1016/j.ijbiomac.2020.07.209] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/22/2020] [Accepted: 07/26/2020] [Indexed: 12/15/2022]
|
9
|
Development of PLA-PBSA based biodegradable active film and its application to salmon slices. Food Packag Shelf Life 2019. [DOI: 10.1016/j.fpsl.2019.100393] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
10
|
Milovanovic S, Markovic D, Mrakovic A, Kuska R, Zizovic I, Frerich S, Ivanovic J. Supercritical CO 2 - assisted production of PLA and PLGA foams for controlled thymol release. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:394-404. [PMID: 30889714 DOI: 10.1016/j.msec.2019.01.106] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 11/21/2018] [Accepted: 01/23/2019] [Indexed: 12/19/2022]
Abstract
Amorphous, medical grade poly(d,l-lactic acid) (PLA) and poly(d,l-lactic-co-glycolic acid) (PLGA) were used to develop systems for controlled release of a natural bioactive substance - thymol. Supercritical carbon dioxide (scCO2) was successfully used both as an impregnation medium for thymol incorporation into the polymer matrix and a foaming agent in a single-step batch process. Impregnation of samples using low to moderate scCO2 densities (273 kg/m3 and 630 kg/m3) and short processing times (2 h and 4 h) enabled thymol loading of 0.92%-6.62% and formation of microcellular foams upon system depressurization. Thymol effect on structural and thermal properties on foamed samples was proven by FTIR and DSC. The effect of CO2 under elevated pressure on the neat polymers was analysed by high pressure DSC. Foaming of polymers with lower molecular weight by CO2 of higher density yielded foams with smaller pores. All tested foams released thymol in a controlled manner in phosphate buffered saline (PBS) at 37 °C within 3 to 6 weeks. Higher loading and lower cell density favoured thymol release rate, while its concentration in PBS for the tested period depended on foam interaction with the medium. Representative PLGA foam sample with the highest thymol loading (6.62%) showed controlled thymol release within 72 h in mediums having pH values from 1.1 to 7.4.
Collapse
Affiliation(s)
- Stoja Milovanovic
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Darka Markovic
- University of Belgrade, Innovation Centre of Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Ana Mrakovic
- Vinča Institute of Nuclear Sciences, Department of Theoretical and Condensed Matter Physics, 11001 Belgrade, Serbia
| | - Robert Kuska
- Ruhr-University Bochum, Institute of Thermo and Fluid Dynamics, Universitätsstraβe 150, 44801 Bochum, Germany
| | - Irena Zizovic
- Wroclaw University of Science and Technology, Faculty of Chemistry, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Sulamith Frerich
- Ruhr-University Bochum, Institute of Thermo and Fluid Dynamics, Universitätsstraβe 150, 44801 Bochum, Germany
| | - Jasna Ivanovic
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia.
| |
Collapse
|
11
|
Ardekani NT, Khorram M, Zomorodian K, Yazdanpanah S, Veisi H, Veisi H. Evaluation of electrospun poly (vinyl alcohol)-based nanofiber mats incorporated with Zataria multiflora essential oil as potential wound dressing. Int J Biol Macromol 2018; 125:743-750. [PMID: 30543881 DOI: 10.1016/j.ijbiomac.2018.12.085] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 12/04/2018] [Accepted: 12/08/2018] [Indexed: 02/07/2023]
Abstract
Infections, especially those caused by multi-drug resistant pathogens, result in serious problems in wound healing process. In this study, Zataria multiflora (ZM) essential oil, as a strong natural antimicrobial agent, is incorporated into poly (vinyl alcohol)-based nanofiber mats to fabricate a novel wound dressing. Different amounts of ZM essential oil (0, 2, 5 and 10% (v/v)) were incorporated into chitosan/poly(vinyl alcohol)/gelatin (CS/PVA/Gel) solutions and then were successfully electrospun into beadless and uniform fibers with 95 ± 14, 154 ± 27, 187 ± 40 and 218 ± 58 nm in diameters, respectively. The produced nanofiber mats (CS/PVA/Gel/ZM) were chemically crosslinked by glutaraldehyde vapor. The chemical compositions of ZM essential oil and nanofiber mats were analyzed using Gas Chromatography-Mass Spectrometry (GC-MS) and Fourier Transform Infrared Spectroscopy (FTIR), respectively. The antimicrobial activity of the CS/PVA/Gel/ZM nanofiber mats was determined by the AATCC100 method. The nanofiber mat loaded with 10% of ZM essential oil completely inhibited the growth of Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans after 24 h of incubation. Swelling investigations showed that the produced nanofibers have a substantial ability to take up water, in the range of 400-900%. Mechanical properties of the nanofiber mats were studied by tensile testing. Furthermore, they were found to be non-toxic by biocompatibility assays on mouse fibroblast (L929) cells. The obtained results have demonstrated that CS/PVA/Gel nanofiber mats, loaded with ZM essential oil, are promising alternatives to conventional wound dressings.
Collapse
Affiliation(s)
| | - Mohammad Khorram
- School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, Iran.
| | - Kamiar Zomorodian
- Basic Sciences in Infectious Diseases Research Center, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Somayeh Yazdanpanah
- Departments of Medical Mycology and Parasitology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hamed Veisi
- Department of Chemistry, Payame Noor university, Tehran, Iran
| | - Hojat Veisi
- Department of Chemistry, Payame Noor university, Tehran, Iran
| |
Collapse
|
12
|
Randazzo W, Fabra MJ, Falcó I, López-Rubio A, Sánchez G. Polymers and Biopolymers with Antiviral Activity: Potential Applications for Improving Food Safety. Compr Rev Food Sci Food Saf 2018; 17:754-768. [DOI: 10.1111/1541-4337.12349] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 03/08/2018] [Accepted: 03/10/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Walter Randazzo
- Dept. of Microbiology and Ecology; Univ. of Valencia.; Av. Dr. Moliner, 50. 46100 Burjassot Valencia Spain
- Dept. of Preservation and Food Safety Technologies; IATA-CSIC; Avda. Agustin Escardino 7 46980 Paterna Valencia Spain
| | - María José Fabra
- Dept. of Preservation and Food Safety Technologies; IATA-CSIC; Avda. Agustin Escardino 7 46980 Paterna Valencia Spain
| | - Irene Falcó
- Dept. of Microbiology and Ecology; Univ. of Valencia.; Av. Dr. Moliner, 50. 46100 Burjassot Valencia Spain
- Dept. of Preservation and Food Safety Technologies; IATA-CSIC; Avda. Agustin Escardino 7 46980 Paterna Valencia Spain
| | - Amparo López-Rubio
- Dept. of Preservation and Food Safety Technologies; IATA-CSIC; Avda. Agustin Escardino 7 46980 Paterna Valencia Spain
| | - Gloria Sánchez
- Dept. of Preservation and Food Safety Technologies; IATA-CSIC; Avda. Agustin Escardino 7 46980 Paterna Valencia Spain
| |
Collapse
|
13
|
Supercritical CO 2 impregnation of PLA/PCL films with natural substances for bacterial growth control in food packaging. Food Res Int 2018; 107:486-495. [PMID: 29580511 DOI: 10.1016/j.foodres.2018.02.065] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 02/03/2018] [Accepted: 02/25/2018] [Indexed: 12/13/2022]
Abstract
Biodegradable polymers with antibacterial properties are highly desirable materials for active food packaging applications. Thymol, a dietary monoterpene phenol with a strong antibacterial activity is abundant in plants belonging to the genus Thymus. This study presents two approaches for supercritical CO2 impregnation of poly(lactic acid)(PLA)/poly(ε-caprolactone)(PCL) blended films to induce antibacterial properties of the material: (i) a batch impregnation process for loading pure thymol, and (ii) an integrated supercritical extraction-impregnation process for isolation of thyme extract and its incorporation into the films, operated in both batch or semi-continuous modes with supercritical solution circulation. The PCL content in films, impregnation time and CO2 flow regime were varied to maximize loading of the films with thymol or thyme extract with preserving films' structure and thermal stability. Representative film samples impregnated with thymol and thyme extract were tested against Gram (-) (Escherichia coli) and Gram(+) (Bacillus subtilis) model strains, by measuring their metabolic activity and re-cultivation after exposure to the films. The film containing thymol (35.8 wt%) showed a strong antibacterial activity leading to a total reduction of bacterial cell viability. Proposed processes enable fast, controlled and organic solvent-free fabrication of the PLA/PCL films containing natural antibacterial substances at moderately low temperature, with a compact structure and a good thermal stability, for potential use as active food packaging materials.
Collapse
|
14
|
Supercritical impregnation of thymol in poly(lactic acid) filled with electrospun poly(vinyl alcohol)-cellulose nanocrystals nanofibers: Development an active food packaging material. J FOOD ENG 2018. [DOI: 10.1016/j.jfoodeng.2017.08.008] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
15
|
Torres A, Ilabaca E, Rojas A, Rodríguez F, Galotto MJ, Guarda A, Villegas C, Romero J. Effect of processing conditions on the physical, chemical and transport properties of polylactic acid films containing thymol incorporated by supercritical impregnation. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.01.019] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
|
16
|
Tawakkal ISMA, Cran MJ, Bigger SW. Effect of Poly(Lactic Acid)/Kenaf Composites Incorporated with Thymol on the Antimicrobial Activity of Processed Meat. J FOOD PROCESS PRES 2016. [DOI: 10.1111/jfpp.13145] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Intan S. M. A. Tawakkal
- College of Engineering and Science; Victoria University, PO Box 14428; Melbourne 8001 Australia
| | - Marlene J. Cran
- Institute for Sustainability and Innovation, Victoria University, PO Box 14428; Melbourne 8001 Australia
| | - Stephen W. Bigger
- College of Engineering and Science; Victoria University, PO Box 14428; Melbourne 8001 Australia
| |
Collapse
|
17
|
Development and characterisation of HPMC films containing PLA nanoparticles loaded with green tea extract for food packaging applications. Carbohydr Polym 2016; 156:108-117. [PMID: 27842804 DOI: 10.1016/j.carbpol.2016.08.094] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 08/12/2016] [Accepted: 06/27/2016] [Indexed: 11/24/2022]
Abstract
A novel active film material based on hydroxypropyl-methylcellulose (HPMC) containing poly(lactic acid) (PLA) nanoparticles (NPs) loaded with antioxidant (AO) green tea extract (GTE) was successfully developed. The PLA NPs were fabricated using an emulsification-solvent evaporation technique and the sizes were varied to enable a controlled release of the AO from the HPMC matrix. A statistical experimental design was used to optimise the synthesis of the NPs in order to obtain different sizes of nanoparticles and the loading of these into the HPMC matrix was also varied. The physico-chemical properties of the composite films were investigated and the release of the AO was confirmed by migration studies in 50% v/v ethanol/water food simulant. The AO capacity of the GTE released from the active films was studied using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical method and the results suggest that the material could potentially be used for extending the shelf-life of food products with high fat content.
Collapse
|