1
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Madlala NC, Khanyile N, Masenya A. Examining the Correlation between the Inorganic Nano-Fertilizer Physical Properties and Their Impact on Crop Performance and Nutrient Uptake Efficiency. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1263. [PMID: 39120369 PMCID: PMC11314324 DOI: 10.3390/nano14151263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 07/19/2024] [Accepted: 07/24/2024] [Indexed: 08/10/2024]
Abstract
The physical properties of nano-fertilizers (NFs) are important in determining their performance, efficacy, and environmental interactions. Nano-fertilizers, due to their small size and high surface area-to-volume ratio, enhance plant metabolic reactions, resulting in higher crop yields. The properties of nano-fertilizers depend on the synthesis methods used. The nanoparticle's nutrient use efficiency (NUE) varies among plant species. This review aims to analyze the relationship between the physical properties of NF and their influence on crop performance and nutrient uptake efficiency. The review focuses on the physical properties of NFs, specifically their size, shape, crystallinity, and agglomeration. This review found that smaller particle-sized nanoparticles exhibit higher nutrient use efficiency than larger particles. Nano-fertilizer-coated additives gradually release nutrients, reducing the need for frequent application and addressing limitations associated with chemical fertilizer utilization. The shapes of nano-fertilizers have varying effects on the overall performance of plants. The crystalline structure of nanoparticles promotes a slow release of nutrients. Amorphous nano-fertilizers improve the NUE and, ultimately, crop yield. Agglomeration results in nanoparticles losing their nanoscale size, accumulating on the outer surface, and becoming unavailable to plants. Understanding the physical properties of nano-fertilizers is crucial for optimizing their performance in agricultural applications.
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Affiliation(s)
| | - Nokuthula Khanyile
- School of Chemical and Physical Sciences, University of Mpumalanga, Mbombela 1200, South Africa
| | - Absalom Masenya
- School of Agricultural Sciences, University of Mpumalanga, Mbombela 1200, South Africa (A.M.)
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2
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Zhou X, Zhou X, Zhou L, Jia M, Xiong Y. Nanofillers in Novel Food Packaging Systems and Their Toxicity Issues. Foods 2024; 13:2014. [PMID: 38998521 PMCID: PMC11241462 DOI: 10.3390/foods13132014] [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: 12/17/2023] [Revised: 06/14/2024] [Accepted: 06/14/2024] [Indexed: 07/14/2024] Open
Abstract
Background: Environmental concerns about petroleum-based plastic packaging materials and the growing demand for food have inspired researchers and the food industry to develop food packaging with better food preservation and biodegradability. Nanocomposites consisting of nanofillers, and synthetic/biopolymers can be applied to improve the physiochemical and antimicrobial properties and sustainability of food packaging. Scope and approach: This review summarized the recent advances in nanofiller and their applications in improved food packaging systems (e.g., nanoclay, carbon nanotubes), active food packaging (e.g., silver nanoparticles (Ag NPs), zinc oxide nanoparticles (ZnO NPs)), intelligent food packaging, and degradable packaging (e.g., titanium dioxide nanoparticles (e.g., TiO2 NPs)). Additionally, the migration processes and related assessment methods for nanofillers were considered, as well as the use of nanofillers to reduce migration. The potential cytotoxicity and ecotoxicity of nanofillers were also reviewed. Key findings: The incorporation of nanofillers may increase Young's modulus (YM) while decreasing the elongation at break (EAB) (y = -1.55x + 1.38, R2 = 0.128, r = -0.358, p = 0.018) and decreasing the water vapor (WVP) and oxygen permeability (OP) (y = 0.30x - 0.57, R2 = 0.039, r = 0.197, p = 0.065). Meanwhile, the addition of metal-based NPs could also extend the shelf-life of food products by lowering lipid oxidation by an average of approx. 350.74% and weight loss by approx. 28.39% during the longest storage period, and significantly increasing antibacterial efficacy against S. aureus compared to the neat polymer films (p = 0.034). Moreover, the migration process of nanofillers may be negligible but still requires further research. Additionally, the ecotoxicity of nanofillers is unclear, as the final distribution of nanocomposites in the environment is unknown. Conclusions: Nanotechnology helps to overcome the challenges associated with traditional packaging materials. Strong regulatory frameworks and safety standards are needed to ensure the appropriate use of nanocomposites. There is also a need to explore how to realize the economic and technical requirements for large-scale implementation of nanocomposite technologies.
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Affiliation(s)
- Xiangyu Zhou
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China;
| | - Xiaoyu Zhou
- The Fine Arts Academy, Hunan Normal University, Changsha 410012, China;
| | - Longli Zhou
- Department of Metabolism, Digestion and Reproduction, Imperial College London, London SW7 2AZ, UK;
| | - Ming Jia
- College of Computer and Mathematics, Central South University of Forestry and Technology, Changsha 410004, China
| | - Ying Xiong
- College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
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3
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Wang Y, Ju J, Diao Y, Zhao F, Yang Q. The application of starch-based edible film in food preservation: a comprehensive review. Crit Rev Food Sci Nutr 2024:1-34. [PMID: 38712440 DOI: 10.1080/10408398.2024.2349735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Using renewable resources for food packaging not only helps reduce our dependence on fossil fuels but also minimizes the environmental impact associated with traditional plastics. Starch has been a hot topic in the field of current research because of its low cost, wide source and good film forming property. However, a comprehensive review in this field is still lacking. Starch-based films offer a promising alternative for sustainable packaging in the food industry. The present paper covers various aspects such as raw material sources, modification methods, and film formation mechanisms. Understanding the physicochemical properties and potential commercial applications is crucial for bridging the gap between research and practical implementation. Finally, the application of starch-based films in the food industry is discussed in detail. Different modifications of starch can improve the mechanical and barrier properties of the films. The addition of active substances to starch-based films can endow them with more functions. Therefore, these factors should be better investigated and optimized in future studies to improve the physicochemical properties and functionality of starch-based films. In summary, this review provides comprehensive information and the latest research progress of starch-based films in the food industry.
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Affiliation(s)
- Yihui Wang
- Special Food Research Institute, Qingdao Agricultural University, Qingdao, People's Republic of China
- Qingdao Special Food Research Institute, Qingdao, People's Republic of China
- Key Laboratory of Special Food Processing (Co-construction by Ministry and Province), Ministry of Agriculture Rural Affairs, People's Republic of China
- Shandong Technology Innovation Center of Special Food, Qingdao, People's Republic of China
| | - Jian Ju
- Special Food Research Institute, Qingdao Agricultural University, Qingdao, People's Republic of China
- Qingdao Special Food Research Institute, Qingdao, People's Republic of China
- Key Laboratory of Special Food Processing (Co-construction by Ministry and Province), Ministry of Agriculture Rural Affairs, People's Republic of China
- Shandong Technology Innovation Center of Special Food, Qingdao, People's Republic of China
| | - Yuduan Diao
- Institute of Animal Husbandry & Veterinary Science, Shanghai Academy of Agricultural Science
| | - Fangyuan Zhao
- Special Food Research Institute, Qingdao Agricultural University, Qingdao, People's Republic of China
- Qingdao Special Food Research Institute, Qingdao, People's Republic of China
- Key Laboratory of Special Food Processing (Co-construction by Ministry and Province), Ministry of Agriculture Rural Affairs, People's Republic of China
- Shandong Technology Innovation Center of Special Food, Qingdao, People's Republic of China
| | - Qingli Yang
- Special Food Research Institute, Qingdao Agricultural University, Qingdao, People's Republic of China
- Qingdao Special Food Research Institute, Qingdao, People's Republic of China
- Key Laboratory of Special Food Processing (Co-construction by Ministry and Province), Ministry of Agriculture Rural Affairs, People's Republic of China
- Shandong Technology Innovation Center of Special Food, Qingdao, People's Republic of China
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4
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Fatima S, Khan MR, Ahmad I, Sadiq MB. Recent advances in modified starch based biodegradable food packaging: A review. Heliyon 2024; 10:e27453. [PMID: 38509922 PMCID: PMC10950564 DOI: 10.1016/j.heliyon.2024.e27453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 12/20/2023] [Accepted: 02/28/2024] [Indexed: 03/22/2024] Open
Abstract
This study reviews the importance of resistant starch (RS) as the polymer of choice for biodegradable food packaging and highlights the RS types and modification methods for developing RS from native starch (NS). NS is used in packaging because of its vast availability, low cost and film forming capacity. However, application of starch is restricted due to its high moisture sensitivity and hydrophilic nature. The modification of NS into RS improves the film forming characteristics and extends the applications of starch into the formulation of packaging. The starch is blended with other bio-based polymers such as guar, konjac glucomannan, carrageenan, chitosan, xanthan gum and gelatin as well as active ingredients such as nanoparticles (NPs), plant extracts and essential oils to develop hybrid biodegradable packaging with reduced water vapor permeability (WVP), low gas transmission, enhanced antimicrobial activity and mechanical properties. Hybrid RS based active packaging is well known for its better film forming properties, crystalline structures, enhanced tensile strength, water resistance and thermal properties. This review concludes that RS, due to its better film forming ability and stability, can be utilized as polymer of choice in the formulation of biodegradable packaging.
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Affiliation(s)
- Saeeda Fatima
- Kauser Abdulla Malik School of Life Sciences, Forman Christian College (A Chartered University), Lahore, 54600, Pakistan
| | - Muhammad Rehan Khan
- Department of Agricultural Science, University of Naples Federico II, Via Università 133, 80055, Portici, NA, Italy
| | - Imran Ahmad
- Food Agriculture and Biotechnology Innovation Lab (FABIL), Florida International University, Biscayne Bay Campus, North Miami, Florida, USA
| | - Muhammad Bilal Sadiq
- Kauser Abdulla Malik School of Life Sciences, Forman Christian College (A Chartered University), Lahore, 54600, Pakistan
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5
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Santhosh R, Sarkar P. Fabrication of jamun seed starch/tamarind kernel xyloglucan bio-nanocomposite films incorporated with chitosan nanoparticles and their application on sapota (Manilkara zapota) fruits. Int J Biol Macromol 2024; 260:129625. [PMID: 38266863 DOI: 10.1016/j.ijbiomac.2024.129625] [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: 04/26/2023] [Revised: 01/16/2024] [Accepted: 01/18/2024] [Indexed: 01/26/2024]
Abstract
The present work develops bio-nanocomposite packaging films by valorizing agricultural byproducts jamun seed starch (JaSS) and tamarind kernel xyloglucan (XG), and adding varying concentrations of chitosan nanoparticles (ChNPs). The blending of JaSS and XG promotes a dense polymer network in the composite films with enhanced packaging attributes. However, ChNPs incorporation significantly reduced the viscosity and dynamic moduli of the JaSS/XG film-forming solutions. The FTIR and XRD results reveal improved intermolecular interactions and crystallinity. The DSC and TGA thermograms showed improved thermal stability in the ChNP-loaded JaSS/XG films. The addition of 3 % w/w ChNPs significantly enhanced the tensile strength (20.42 MPa), elastic modulus (0.8 GPa), and contact angle (89°), along with reduced water vapor transmission rate (13.26 g/h.m2) of the JaSS/XG films. The films exhibited strong antimicrobial activity against Bacillus cereus and Escherichia coli. More interestingly, the JaSS/XG/ChNPs coating on the sapota fruits retarded the weight loss and color change up to 12 days of storage. Overall, the JaSS/XG/ChNP bio-nanocomposites are promising packaging materials.
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Affiliation(s)
- R Santhosh
- Department of Food Process Engineering, National Institute of Technology Rourkela, India
| | - Preetam Sarkar
- Department of Food Process Engineering, National Institute of Technology Rourkela, India.
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6
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Fronza P, Batista MJPA, Franca AS, Oliveira LS. Bionanocomposite Based on Cassava Waste Starch, Locust Bean Galactomannan, and Cassava Waste Cellulose Nanofibers. Foods 2024; 13:202. [PMID: 38254503 PMCID: PMC10814067 DOI: 10.3390/foods13020202] [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: 11/20/2023] [Revised: 12/27/2023] [Accepted: 01/05/2024] [Indexed: 01/24/2024] Open
Abstract
Natural polysaccharides are among the renewable sources with great potential for replacing petroleum-derived chemicals as precursors to produce biodegradable films. This study aimed to prepare biopolymeric films using starch extracted from the periderm and cortex of cassava roots (waste from cassava root processing), locust bean galactomannan, and cellulose nanofibers also obtained from cassava waste. The films were prepared by casting, and their physicochemical, mechanical, and biodegradability properties were evaluated. The content of cellulose nanofibers varied from 0.5 to 2.5%. Although the addition of cellulose nanofibers did not alter the mechanical properties of the films, it significantly enhanced the vapor barrier of the films (0.055 g mm/m2 h kPa-2.5% nanofibers) and their respective stabilities in aqueous acidic and alkaline media. All prepared films were biodegradable, with complete degradation occurring within five days. The prepared films were deemed promising alternatives for minimizing environmental impacts caused by the disposal of petroleum-derived materials.
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Affiliation(s)
- Pãmella Fronza
- Programa de Pós-Graduação em Ciência de Alimentos, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil; (P.F.); (M.J.P.A.B.); (L.S.O.)
| | - Michelle J. P. A. Batista
- Programa de Pós-Graduação em Ciência de Alimentos, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil; (P.F.); (M.J.P.A.B.); (L.S.O.)
| | - Adriana S. Franca
- Programa de Pós-Graduação em Ciência de Alimentos, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil; (P.F.); (M.J.P.A.B.); (L.S.O.)
- Departamento de Engenharia Mecânica, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil
| | - Leandro S. Oliveira
- Programa de Pós-Graduação em Ciência de Alimentos, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil; (P.F.); (M.J.P.A.B.); (L.S.O.)
- Departamento de Engenharia Mecânica, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil
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7
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Jia R, Huang M, Zeng M, Liu S, Chen W, Guo Z. Structural Properties of Lotus Seed Starch Nanocrystals Prepared Using Ultrasonic-Assisted Acid Hydrolysis. Foods 2023; 12:foods12102050. [PMID: 37238868 DOI: 10.3390/foods12102050] [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: 03/29/2023] [Revised: 04/24/2023] [Accepted: 05/14/2023] [Indexed: 05/28/2023] Open
Abstract
This study provides a novel method of preparing lotus seed starch nanocrystals (LS-SNCs) using acid hydrolysis combined with ultrasonic-assisted acid hydrolysis (U-LS-SNCs) and evaluates the structural characteristics of starch nanocrystals using scanning electron microscopy; analysis of particle size, molecular weight, and X-ray diffraction patterns; and FT-IR spectroscopy. The results showed that the preparation time of U-LS-SNCs could be reduced to 2 days less than that for LS-SNCs. The smallest particle size and molecular weight were obtained after a 30 min treatment with 200 W of ultrasonic power and 5 days of acid hydrolysis. The particle size was 147 nm, the weight-average molecular weight was 3.42 × 104 Da, and the number-average molecular weight was 1.59 × 104 Da. When the applied ultrasonic power was 150 W for 30 min and acid hydrolysis was applied for 3 days, the highest relative crystallinity of the starch nanocrystals was 52.8%. The modified nanocrystals can be more widely used in various applications such as food-packaging materials, fillers, pharmaceuticals, etc.
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Affiliation(s)
- Ru Jia
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- China-Ireland International Cooperation Centre for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Minli Huang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- China-Ireland International Cooperation Centre for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Muhua Zeng
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- China-Ireland International Cooperation Centre for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Sidi Liu
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- China-Ireland International Cooperation Centre for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Wenjing Chen
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- China-Ireland International Cooperation Centre for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Zebin Guo
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- China-Ireland International Cooperation Centre for Food Material Science and Structure Design, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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8
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Wan S, Liu Q, Yang D, Guo P, Gao Y, Mo R, Zhang Y. Characterization of high amylose corn starch-cinnamaldehyde inclusion films for food packaging. Food Chem 2023; 403:134219. [DOI: 10.1016/j.foodchem.2022.134219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 08/27/2022] [Accepted: 09/09/2022] [Indexed: 11/29/2022]
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9
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Accelerated Shelf-Life and Stability Testing of Hydrolyzed Corn Starch Films. Polymers (Basel) 2023; 15:polym15040889. [PMID: 36850173 PMCID: PMC9967754 DOI: 10.3390/polym15040889] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 02/03/2023] [Accepted: 02/07/2023] [Indexed: 02/15/2023] Open
Abstract
Nonbiodegradable food packaging films are made from plastics such as polyethylene and polypropylene, which can take hundreds of years to decompose and create environmental hazards. On the other hand, biodegradable food packaging films are made from renewable materials such as corn starch or cellulose, that degrade within a few weeks or months and prove to be more sustainable and environmentally friendly. In this work, we used corn starch hydrolyzed (CSH) with α-amylase to prepare a film with biodegradable properties. The film was tested for 60 days at different accelerated temperatures and relative humidity (RH), 13 ± 2 °C and 65 ± 5% RH, 23 ± 2 °C and 45 ± 5% RH, and 33 ± 2 °C and 30 ± 5% RH, to test its durability and stability. Soil biodegradation of the CSH film was evaluated by visual appearance, microscopic observation, weight loss, scanning electron microscopy (SEM), and Fourier-transformed infrared spectroscopy (FTIR) every 6 days. The film was found to have strong hygroscopic properties and was able to last up to 10 months if it is maintained at 20 ± 5 °C and 45 ± 5% RH. After the biodegradability test for at least 30 days, the film showed a significantly higher weight loss rate and microbial activity on the surface of the film, which indicates that the film is biodegradable. The present work recommends biodegradable CSH films as an excellent environmentally friendly choice for dried foods packaging, due to their good shelf life at room temperature, which is beneficial when shipping and storing products, but these films are not suitable for foods with high moisture content.
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10
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Cassava Starch Films Containing Quinoa Starch Nanocrystals: Physical and Surface Properties. Foods 2023; 12:foods12030576. [PMID: 36766104 PMCID: PMC9914035 DOI: 10.3390/foods12030576] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/24/2023] [Accepted: 01/24/2023] [Indexed: 01/31/2023] Open
Abstract
Quinoa starch nanocrystals (QSNCs), obtained by acid hydrolysis, were used as a reinforcing filler in cassava starch films. The influence of QSNC concentrations (0, 2.5, 5.0, 7.5 and 10%, w/w) on the film's physical and surface properties was investigated. QSNCs exhibited conical and parallelepiped shapes. An increase of the QSNC concentration, from 0 to 5%, improved the film's tensile strength from 6.5 to 16.5 MPa, but at 7.5%, it decreased to 11.85 MPa. Adequate exfoliation of QSNCs in the starch matrix also decreased the water vapor permeability (~17%) up to a 5% concentration. At 5.0% and 7.5% concentrations, the films increased in roughness, water contact angle, and opacity, whereas the brightness decreased. Furthermore, at these concentrations, the film's hydrophilic nature changed (water contact angle values of >65°). The SNC addition increased the film opacity without causing major changes in color. Other film properties, such as thickness, moisture content and solubility, were not affected by the QSNC concentration. The DSC (differential scanning calorimetry) results indicated that greater QSNC concentrations increased the second glass transition temperature (related to the biopolymer-rich phase) and the melting enthalpy. However, the film's thermal stability was not altered by the QSNC addition. These findings contribute to overcoming the starch-based films' limitations through the development of nanocomposite materials for future food packaging applications.
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11
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Moradi M, Jouki M, Emtiazjoo M, Mooraki N, Shakouri MJ. Biocompatible pH-sensitive intelligent film made by bioactive compounds of Dutch rose, potato starch and nanocrystals in detection of trout fillet spoilage. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2022. [DOI: 10.1007/s11694-022-01710-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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12
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Goiana ML, Mattos ALA, de Azeredo HMC, de Freitas Rosa M, Fernandes FAN. Influence of Dielectric Barrier Discharge Cold Plasma Treatment on Starch, Gelatin, and Bacterial Cellulose Biodegradable Polymeric Films. Polymers (Basel) 2022; 14:polym14235215. [PMID: 36501609 PMCID: PMC9741050 DOI: 10.3390/polym14235215] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/24/2022] [Accepted: 11/26/2022] [Indexed: 12/05/2022] Open
Abstract
The environmental damage caused by plastic packaging and the need to reduce pollution requires actions to substitute plastic materials for more sustainable and biodegradable materials. Starch, gelatin, and bacterial cellulose films are three potential biodegradable polymeric films for use in packaging. However, these materials need improvements in their physical, chemical, and mechanical properties to be used in packaging. In this work, these films were treated with cold plasma to evaluate the effects of treatment conditions on several physical, chemical, and mechanical properties. The dielectric barrier discharge plasma technology was applied with varying treatment times (0 to 20 min) and excitation frequencies (50 to 900 Hz) at 20 kV. The optimal excitation frequency for starch films (50 Hz) was different from the optimal frequency for gelatin and bacterial cellulose films (900 Hz), indicating a high dependency on the treatment in this variable that is often neglected. Plasma treatment improved the hydrophobicity, surface morphology, water resistance, and mechanical properties of all three films, with the advantage of not recurring to chemical or biological additives.
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Affiliation(s)
- Mayara Lima Goiana
- Departamento de Engenharia Química, Universidade Federal do Ceará, Fortaleza 60440-900, CE, Brazil
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13
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Production of Thermoplastic Starch- Aloe vera Gel Film with High Tensile Strength and Improved Water Solubility. Polymers (Basel) 2022; 14:polym14194213. [PMID: 36236161 PMCID: PMC9571595 DOI: 10.3390/polym14194213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 09/12/2022] [Accepted: 09/23/2022] [Indexed: 11/19/2022] Open
Abstract
Biodegradable film packaging made from thermoplastic starch (TPS) has low mechanical performance and high water solubility, which is incomparable with synthetic films. In this work, Aloe vera (AV) gel and plasticized soluble potato starch were utilised to improve the mechanical stability and water solubility of TPS. Dried starch was mixed with glycerol and different AV gel concentrations (0% to 50%). The TPS + 50% AV gel (30 g TPS + 15 g AV gel) showed the best improvement compared to TPS alone. When compared to similar TPS films with AV gel added, this film is stronger and dissolves better in water. Mechanical qualities improved the tensile strength and Young's modulus of the TPS film, with 1.03 MPa to 9.14 MPa and 51.92 MPa to 769.00 MPa, respectively. This was supported by the improvement of TPS water solubility from 57.44% to 46.6% and also by the increase in decomposition temperature of the TPS. This promises better heat resistance. The crystallinity percentage increase to 24.26% suggested that the formation of hydrogen bonding between TPS and AV gel enhanced crosslinking in the polymeric structure. By adding AV gel, the TPS polymeric structure is improved and can be used as a biodegradable food-packaging film.
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14
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Martins PC, Latorres JM, Martins VG, Machado AV. Effect of starch nanocrystals addition on the physicochemical, thermal, and optical properties of low‐density polyethylene (
LDPE
) films. POLYM ENG SCI 2022. [DOI: 10.1002/pen.25964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Paola Chaves Martins
- School of Chemistry and Food, Laboratory of Food Technology Federal University of Rio Grande (FURG) Rio Grande Brazil
| | - Juliana Machado Latorres
- School of Chemistry and Food, Laboratory of Food Technology Federal University of Rio Grande (FURG) Rio Grande Brazil
| | - Vilásia Guimarães Martins
- School of Chemistry and Food, Laboratory of Food Technology Federal University of Rio Grande (FURG) Rio Grande Brazil
| | - Ana Vera Machado
- Institute for Polymers and Composites Minho University Guimarães Portugal
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15
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Martins PC, Latorres JM, Machado AV, Martins VG. Enhancement of polylactic acid films properties by incorporation of starch nanocrystals. J Appl Polym Sci 2022. [DOI: 10.1002/app.52188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Paola Chaves Martins
- School of Chemistry and Food Engineering, Laboratory of Food Technology Federal University of Rio Grande (FURG) Rio Grande Brazil
| | - Juliana Machado Latorres
- School of Chemistry and Food Engineering, Laboratory of Food Technology Federal University of Rio Grande (FURG) Rio Grande Brazil
| | - Ana Vera Machado
- Institute for Polymers and Composites Minho University Braga Portugal
| | - Vilásia Guimarães Martins
- School of Chemistry and Food Engineering, Laboratory of Food Technology Federal University of Rio Grande (FURG) Rio Grande Brazil
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