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Sudheesh C, Varsha L, Siddiqui SA, Sunooj KV, Pillai S. Exploring urea as a prospective auxiliary for starch functionalization: A concise review on modified starch properties and the sustainable packaging films. Food Chem 2024; 455:139914. [PMID: 38823124 DOI: 10.1016/j.foodchem.2024.139914] [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: 03/26/2024] [Revised: 05/09/2024] [Accepted: 05/28/2024] [Indexed: 06/03/2024]
Abstract
Urea is also known as carbamide, an inexpensive and eco-friendly additive for starch functionalization. This article reviews the potential role of urea in starch modification, with the prominence of the mechanism of urea action, alterations in the starch structure and functional properties. In addition, current literature conveys the prospective effect of urea in fabricating starch films for food packaging, and the relevant areas that need to be covered in the forthcoming research are specified at the end of the article section. Urea can modify the diverse physico-chemical and functional properties of starch. Starch-based films exhibit pronounced effects on their mechanical and barrier properties upon the incorporation of urea, although this effect strongly depends on the urea content and degree of substitution (DS). Overall, urea holds great potential for use in the starch and bioplastic film industries, as it produces biocompatible derivatives with desirable performance.
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Affiliation(s)
- Cherakkathodi Sudheesh
- Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, Kerala 695019, India.
| | - Latha Varsha
- Department of Food Science and Technology, Pondicherry University, Puducherry 605014, India
| | - Shahida Anusha Siddiqui
- Technical University of Munich, Campus Straubing for Biotechnology and Sustainability, Essigberg 3, 94315 Straubing, Germany; German Institute of Food Technologies (DIL e.V.), Prof.-von-Klitzing Str. 7, 49610 D-Quakenbrück, Germany
| | | | - Saju Pillai
- Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, Kerala 695019, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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2
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Teshager AA, Atlabachew M, Alene AN. Development of biodegradable film from cactus ( Opuntia Ficus Indica) mucilage loaded with acid-leached kaolin as filler. Heliyon 2024; 10:e31267. [PMID: 38845886 PMCID: PMC11153097 DOI: 10.1016/j.heliyon.2024.e31267] [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: 01/01/2024] [Revised: 04/30/2024] [Accepted: 05/14/2024] [Indexed: 06/09/2024] Open
Abstract
Nowadays, substituting petroleum-based plastics with biodegradable polymers made from polysaccharides loaded with various reinforcing materials has recently gained attention due to the impact of conventional plastics wastes. In this study, polysaccharidic mucilage from Ethiopian cactus (Opuntia Ficus Indica) was derived using microwave-assisted extraction technique to develop biodegradable polymers that were inexpensive, readily available, simple to make, and ecofriendly. The effect of microwave power 300-800 W, solid-liquid (cactus-sodium hydroxide solution) ratio 1:5-1:25, sodium hydroxide concentration 0.1-0.8 mol/L, and extraction time 2-10 min on mucilage extraction were studied and the maximum yield of mucilage was attained at optimized parameters of 506 W, 1:20, 0.606 mol/L, and 9.5 min, respectively. Biodegradable polymers made with mucilage alone have poor mechanical characteristics and are thermally unstable. Thus, to overcome the stated problems, glycerol as a plasticizer and acid-leached kaolin crosslinked with urea as a reinforcing material were used. Moreover, the effect of acid-leached kaolin and glycerol on the physico-chemical properties of the films was studied, and a maximum tensile strength of 6.74 MPa with 18.45 % elongation at break, thermally improved biodegradability of 26 %, were attained at 10 % acid-leached kaolin and 20 % glycerol crosslinking with 2 % urea. But the maximum degradability of 53.5 % was attained at 30 % glycerol content. The control and reinforced biodegradable films were characterized using TGA, FTIR, SEM, and XRD to determine the thermal, functional group, morphology, and crystallinity of the bioplastics, respectively. These biodegradable plastics may be used for packaging application.
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Affiliation(s)
- Alebel Abebaw Teshager
- Faculty of Chemical and Food Engineering, Bahir Dar Institute of Technology, Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia
| | - Minaleshewa Atlabachew
- Department of Chemistry, College of Science, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia
| | - Adugna Nigatu Alene
- Faculty of Chemical and Food Engineering, Bahir Dar Institute of Technology, Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia
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Xu X, Grohganz H, Rades T. Anti-plasticizing effect of water on prilocaine and lidocaine - the role of the hydrogen bonding pattern. Phys Chem Chem Phys 2024; 26:14149-14159. [PMID: 38712380 DOI: 10.1039/d4cp00995a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
It is generally accepted that water, as an effective plasticizer, decreases the glass transition temperatures (Tgs) of amorphous drugs, potentially resulting in physical instabilities. However, recent studies suggest that water can also increase the Tgs of the amorphous forms of the drugs prilocaine (PRL) and lidocaine (LID), thus acting as an anti-plasticizer. To further understand the nature of the anti-plasticizing effect of water, interactions with different solvents and the resulting structural features of PRL and LID were investigated by Fourier transform infrared spectroscopy (FTIR) and quantum chemical simulations. Heavy water (deuterium oxides) was chosen as a solvent, as the deuterium and hydrogen atoms are electronically identical. It was found that substituting hydrogen with deuterium showed a minimal impact on the anti-plasticization of water on PRL. Ethanol and ethylene glycol were chosen as solvents to compare the hydrogen bonding patterns occurring between the hydroxyl groups of the solvents and PRL and LID. Comparison of the various Tgs showed a weaker anti-plasticizing potential of these two solvents on PRL and LID. The frequency shifts of the amide CO groups of PRL and LID due to the interactions with water, heavy water, ethanol, and ethylene glycol as observed in the FTIR spectra showed a correlation with the binding energies calculated by quantum chemical simulations. Overall, this study showed that the combination of weak hydrogen bonding and strong electrostatic contributions in hydrated PRL and LID could play an important role in inducing the anti-plasticizing effect of water on those drugs.
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Affiliation(s)
- Xiaoyue Xu
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark.
| | - Holger Grohganz
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark.
| | - Thomas Rades
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark.
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Wang S, Li Y, Zhang J, Man J, Nie Y, Ji M, Chen H, Li F, Zhang C. Treatment and mechanism for hot melting starch by reducing the molecular chain winding and crystallinity. Carbohydr Polym 2024; 325:121574. [PMID: 38008485 DOI: 10.1016/j.carbpol.2023.121574] [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: 06/25/2023] [Revised: 09/29/2023] [Accepted: 11/06/2023] [Indexed: 11/28/2023]
Abstract
Unlike thermoplastic petroleum-based materials, starch-based materials rely on aqueous systems but are incapable of hot melting, resulting in low processing efficiency and limited large-scale industrial applications. In this study, the combination of α-amylase liquefaction and urea plasticization was used for the first time to obtain enzymatic thermoplastic starch (ETPS) for hot melting by changing the molecular chain of starch. ETPS showed an apparent hot melting phenomenon when heated below 200 °C. Differential scanning calorimetry revealed that heat absorption peaks were obviously reduced, and the hot melting phenomenon occurred easily depending on the combination of enzymatic hydrolysis and plasticization. Dynamic mechanical analysis indicated that the combined modification effectively increased the number of freely movable chains. The red shift of -OH stretching vibration peaks indicated the formation of strengthened hydrogen bonds in ETPS. X-ray diffraction showed that the crystallinity of ETPS was reduced to 5.68 %, effectively reducing the regenerative phenomenon. Gel permeation chromatography revealed that the molecular weight of ETPS decreased, and the entanglements between molecular chains were reduced. A tensile test showed that the elongation at break of ETPS was as high as 235.29 %, which was much higher than those of enzymatic hydrolysis starch and thermoplastic starch.
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Affiliation(s)
- Shen Wang
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
| | - Yanhui Li
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
| | - Jingxian Zhang
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
| | - Jia Man
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture (M of E), School of Mechanical Engineering, Shandong University, Jinan 250061, China
| | - Yanyan Nie
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture (M of E), School of Mechanical Engineering, Shandong University, Jinan 250061, China
| | - Maocheng Ji
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture (M of E), School of Mechanical Engineering, Shandong University, Jinan 250061, China
| | - Heyu Chen
- College of Mechanical and Electronic Engineering, Northwest A&F University, 22 Xinong Road, Yangling, Shanxi 712100, China
| | - Fangyi Li
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture (M of E), School of Mechanical Engineering, Shandong University, Jinan 250061, China
| | - Chuanwei Zhang
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China.
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Ciaramitaro V, Piacenza E, Meo PL, Librici C, Calvino MM, Conte P, Lazzara G, Chillura Martino DF. From micro to macro: Physical-chemical characterization of wheat starch-based films modified with PEG200, sodium citrate, or citric acid. Int J Biol Macromol 2023; 253:127225. [PMID: 37797849 DOI: 10.1016/j.ijbiomac.2023.127225] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 09/25/2023] [Accepted: 10/01/2023] [Indexed: 10/07/2023]
Abstract
Needing to extend the shelf-life of packaged food and the evolving consumer demands led researchers to seek innovative, eco-friendly, and biocompatible packaging solutions. Starch is among the most promising natural and renewable alternatives to non-degradable plastics. Here, we deeply study the structural features of starch films modified by adding citric acid (CA) or sodium citrate (SC) as a cross-linker and polyethylene glycol 200 (PEG200) as a plasticizer and obtained through solvent casting. The substances' influence on starch films was evaluated through Attenuated Total Reflection Fourier Transform Infrared (ATR-FTIR) and Solid-state Nuclear Magnetic Resonance (ss-NMR) spectroscopies. Films' macroscopic properties, such as swelling index, solubility, thermo-mechanical features, and moisture absorption, were also assessed to foresee potential applications. Proper amounts of CA, CS, and PEG200 improve film properties and inhibit starch chains' retrogradation and recrystallization. Besides, the chemical neighbourhood of nuclei observed through ss-NMR significantly changed alongside the polymer chains' mobility. The latter result indicates a different polymer chain structural organization that could justify the film's higher resistance to thermal degradation and elongation at the break. This methodological approach is effective in predicting the macroscopic behaviour of a polymeric material and could be helpful for the application of such products in food preservation.
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Affiliation(s)
- Veronica Ciaramitaro
- Department of Biological, Chemical, and Pharmaceutical Sciences and Technology (STEBICEF), Università degli Studi di Palermo, Viale delle Scienze pad. 17, 90128 Palermo, Italy
| | - Elena Piacenza
- Department of Biological, Chemical, and Pharmaceutical Sciences and Technology (STEBICEF), Università degli Studi di Palermo, Viale delle Scienze pad. 17, 90128 Palermo, Italy.
| | - Paolo Lo Meo
- Department of Biological, Chemical, and Pharmaceutical Sciences and Technology (STEBICEF), Università degli Studi di Palermo, Viale delle Scienze pad. 17, 90128 Palermo, Italy.
| | - Calogero Librici
- Department of Agricultural, Food and Forest Sciences, Università degli Studi di Palermo, Viale delle Scienze pad. 4, Palermo, Italy
| | - Martina M Calvino
- Department of Physics and Chemistry - Emilio Segrè, Università degli Studi di Palermo, Viale delle Scienze pad. 17, Palermo, Italy
| | - Pellegrino Conte
- Department of Agricultural, Food and Forest Sciences, Università degli Studi di Palermo, Viale delle Scienze pad. 4, Palermo, Italy
| | - Giuseppe Lazzara
- Department of Physics and Chemistry - Emilio Segrè, Università degli Studi di Palermo, Viale delle Scienze pad. 17, Palermo, Italy
| | - Delia F Chillura Martino
- Department of Biological, Chemical, and Pharmaceutical Sciences and Technology (STEBICEF), Università degli Studi di Palermo, Viale delle Scienze pad. 17, 90128 Palermo, Italy
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Ma C, Tao H, Tan C, Gao S, Wu Z, Guo L, Cui B, Yuan F, Zou F, Liu P, Lu L. Effects of polyols with different hydroxyl numbers on the structure and properties of starch straws. Carbohydr Polym 2023; 321:121297. [PMID: 37739530 DOI: 10.1016/j.carbpol.2023.121297] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 07/25/2023] [Accepted: 08/12/2023] [Indexed: 09/24/2023]
Abstract
To study the relationship between the number of hydroxyl groups of polyols and the plasticizing effect, the effects of different polyols including ethylene glycol, glycerol, erythritol, xylitol and sorbitol on the structure and properties of corn starch straws were analyzed and compared. The results showed that the addition of plasticizer significantly improved the performance of starch straws, which greatly improved the mechanical properties, water absorption rate (WAR) and thermal stability. However, there was no linear relationship between the plasticizing effect on starch straws and the number of hydroxyl groups in plasticizers. Fourier transform infrared (FTIR) results showed that erythritol formed the strongest intermolecular interaction with starch. Starch straws with erythritol (S-ERY) had the highest bending force (Fb = 25.78 N) and the lowest WAR. Starch straws with glycerol (S-GLY) showed the lowest relative crystallinity (RC = 12.87 %) and the highest temperature of the maximum degradation (Tdmax = 302.1 °C). In addition, after storing for 180 days, S-GLY showed higher modulus of elasticity in bending (Eb = 4.26 N/cm) and a uniform surface.
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Affiliation(s)
- Chenyu Ma
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Sciences and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Haiteng Tao
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Sciences and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Congping Tan
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Sciences and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Shijun Gao
- Shandong Key Laboratory of Starch Bio-based Materials and Green Manufacturing, Shandong Shouguang Juneng Golden Corn Development Co., Shouguang, China
| | - Zehua Wu
- Shandong Key Laboratory of Starch Bio-based Materials and Green Manufacturing, Shandong Shouguang Juneng Golden Corn Development Co., Shouguang, China
| | - Li Guo
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Sciences and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.
| | - Bo Cui
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Sciences and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.
| | - Fang Yuan
- School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Feixue Zou
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Sciences and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Pengfei Liu
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Sciences and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Lu Lu
- State Key Laboratory of Biobased Material and Green Papermaking, School of Food Sciences and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
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Abas KM, Attia AAM. Thermoplastic starch (TPS)-based composite films for wastewater treatment: synthesis and fundamental characterization. BMC Chem 2023; 17:84. [PMID: 37482611 PMCID: PMC10364412 DOI: 10.1186/s13065-023-00998-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 06/30/2023] [Indexed: 07/25/2023] Open
Abstract
Modification of starch is a potential basic research aiming to improve its water barrier properties. The general purpose of this study is to manufacture cross-linked iodinated starch citrate (ISC) with a degree of substitution (DS) ≈ 0.1 by modifying native corn starch with citric acid in the presence of iodine as an oxidizing agent. Thermoplastic starch (TPS) was generated with urea as a plasticizer and blended with various concentrations of ISC of (2, 4, 6%) (wt/wt) to obtain (UTPS/ISC2, UTPS/ISC4, and UTPS/ISC6). Nanocomposite film was formed from UTPS/ISC2 in presence of stabilized iodinated cellulose nanocrystals UTPS/ISC2/SICNCs via gelatinization at a temperature of 80ºC. Water solubility and water vapor release were studied amongst the water barrier features. The fabricated starch-based composite films were evaluated utilizing Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electronic Microscope analysis (SEM), surface area, and tensile measurements. The adsorption of crystal violet (CV) dye onto produced samples was examined in an aqueous solution. The findings revealed that the UTPS/ISC2/ISCNCs has 83% crystal violet elimination effectiveness. Moreover, the adsorption isotherms were assessed and figured out to vary in the order of Langmuir > Temkin > Freundlich > Dubinin-Radushkevich.
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Affiliation(s)
- Khadiga Mohamed Abas
- Laboratory of Surface Chemistry and Catalysis, National Research Center, 33 El-Bohouth St., Giza, 12622, Egypt
| | - Amina Abdel Meguid Attia
- Laboratory of Surface Chemistry and Catalysis, National Research Center, 33 El-Bohouth St., Giza, 12622, Egypt.
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Zdanowicz M, Rokosa M, Pieczykolan M, Antosik AK, Chudecka J, Mikiciuk M. Study on Physicochemical Properties of Biocomposite Films with Spent Coffee Grounds as a Filler and Their Influence on Physiological State of Growing Plants. Int J Mol Sci 2023; 24:ijms24097864. [PMID: 37175572 PMCID: PMC10178467 DOI: 10.3390/ijms24097864] [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: 03/30/2023] [Revised: 04/20/2023] [Accepted: 04/23/2023] [Indexed: 05/15/2023] Open
Abstract
The aim of the study was to plasticize corn starch with two selected urea (U)-rich plasticizers: choline chloride (CC):U or betaine (B):U eutectic mixtures at a molar ratio of 1:5 with a presence of spent coffee grounds as a filler. The biomaterials were prepared via a solventless one-step extrusion method and then extrudates were thermoformed using compression molding into sheets. The materials were characterized using mechanical and sorption tests, TGA, DMTA and FTIR. Additionally, a study on the biodegradation and remaining nitrogen content in soil was conducted. For the first time, an influence on physiological state of growing plants of the materials presence in soil was investigated. The addition of the coffee filler slightly increased the mechanical properties and decreased the swelling degree of the materials. The DMTA results indicated that biocomposites were easily thermoformable and the high filler addition (20 pph per polymer matrix) did not affect the processability. According to the biodegradation test results, the materials disappeared in soil within ca. 70 days. The results from this study on the physiological state of growing plants revealed that the materials, especially plasticized with CCU, did not exhibit any toxic effect on the yellow dwarf bean. The percentage of total nitrogen in the soil substrate in comparison with the control increased indicating an effective release of nitrogen from the TPS materials into the substrate.
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Affiliation(s)
- Magdalena Zdanowicz
- Center of Bioimmobilisation and Innovative Packaging Materials, Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology in Szczecin, Janickiego St. 35, 71-270 Szczecin, Poland
| | - Marta Rokosa
- Laboratory of Plant Physiology and Entomology, Department of Bioengineering, Faculty of Environmental Management and Agriculture, West Pomeranian University of Technology in Szczecin, Słowackiego St. 17, 70-953 Szczecin, Poland
| | - Magdalena Pieczykolan
- Center of Bioimmobilisation and Innovative Packaging Materials, Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology in Szczecin, Janickiego St. 35, 71-270 Szczecin, Poland
| | - Adrian Krzysztof Antosik
- Center of Bioimmobilisation and Innovative Packaging Materials, Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology in Szczecin, Janickiego St. 35, 71-270 Szczecin, Poland
- Department of Chemical Organic Technology and Polymeric Materials, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastow Ave. 42, 71-065 Szczecin, Poland
| | - Justyna Chudecka
- Department of Environmental Management, Faculty of Environmental Management and Agriculture, West Pomeranian University of Technology in Szczecin, Słowackiego St. 17, 71-434 Szczecin, Poland
| | - Małgorzata Mikiciuk
- Laboratory of Plant Physiology and Entomology, Department of Bioengineering, Faculty of Environmental Management and Agriculture, West Pomeranian University of Technology in Szczecin, Słowackiego St. 17, 70-953 Szczecin, Poland
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Zeghlouli J, Schiavone N, Askanian H, Guendouz A, El Modafar C, Michaud P, Delattre C. Thermal, Morphological and Mechanical Properties of a BioPE Matrix Composite: Case of Shell, Pulp, and Argan Cake as Biofillers. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2241. [PMID: 36984120 PMCID: PMC10055938 DOI: 10.3390/ma16062241] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 02/13/2023] [Accepted: 02/25/2023] [Indexed: 06/18/2023]
Abstract
Extrusion and hot compressing molding processes were used to create bio-polyethylene (BioPE) composites reinforced with argan byproducts (shell, pulp, and argan cake) as bio-fillers. The thermal stability of the composites wass analyzed by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Dynamical mechanical analysis and rheological testing were used to investigate their mechanical properties. The morphological results showed a good adhesion between the argan and BioPE matrix. More efficient mechanical properties have been distinguished in the case of argan byproduct-based composite. A higher Young's modulus was noted for all the biocomposites compared to pure BioPE. Thermal analysis revealed that the addition of bio-filler to polymer reduced decomposition temperatures. This study provides an ecological alternative for upgrading the valorization of abundant and underutilized Moroccan biomass. Furthermore, the possibility of using argan byproducts in composite manufacturing will help open up new markets for what is currently considered waste.
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Affiliation(s)
- Jihane Zeghlouli
- Centre d’Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech, URL-CNRST 05), Faculté des Sciences et Techniques Marrakech, Université Cadi Ayyad, Marrakech 40000, Morocco
- Clermont Auvergne INP, CNRS, Institut Pascal, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France
| | - Nicola Schiavone
- Institut de Chimie de Clermont Ferrand (ICCF), UMR 6296 Université Clermont Auvergne, CNRS, SIGMA Clermont, F-63000 Clermont-Ferrand, France
| | - Haroutioun Askanian
- Institut de Chimie de Clermont Ferrand (ICCF), UMR 6296 Université Clermont Auvergne, CNRS, SIGMA Clermont, F-63000 Clermont-Ferrand, France
| | - Amine Guendouz
- Centre d’Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech, URL-CNRST 05), Faculté des Sciences et Techniques Marrakech, Université Cadi Ayyad, Marrakech 40000, Morocco
| | - Cherkaoui El Modafar
- Centre d’Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech, URL-CNRST 05), Faculté des Sciences et Techniques Marrakech, Université Cadi Ayyad, Marrakech 40000, Morocco
| | - Philippe Michaud
- Clermont Auvergne INP, CNRS, Institut Pascal, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France
| | - Cédric Delattre
- Clermont Auvergne INP, CNRS, Institut Pascal, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France
- Institut Universitaire de France (IUF), 1 Rue Descartes, 75005 Paris, France
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10
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Morozova OV, Vasil'eva IS, Shumakovich GP, Zaitseva EA, Yaropolov AI. Deep Eutectic Solvents for Biotechnology Applications. BIOCHEMISTRY (MOSCOW) 2023; 88:S150-S175. [PMID: 37069119 DOI: 10.1134/s0006297923140092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Deep eutectic solvents (DESs) are an alternative to traditional organic solvents and ionic liquids and meet the requirements of "green" chemistry. They are easy to prepare using low-cost constituents, are non-toxic and biodegradable. The review analyzes literature on the use of DES in various fields of biotechnology, provides data on the types of DESs, methods for their preparation, and properties. The main areas of using DESs in biotechnology include extraction of physiologically active substances from natural resources, pretreatment of lignocellulosic biomass to improve enzymatic hydrolysis of cellulose, production of bioplastics, as well as a reaction medium for biocatalytic reactions. The aim of this review is to summarize available information on the use of new solvents for biotechnological purposes.
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Affiliation(s)
- Olga V Morozova
- Bach Institute of Biochemistry, Federal Research Center "Fundamental Bases of Biotechnology" of the Russian Academy of Sciences, Moscow, 119071, Russia
| | - Irina S Vasil'eva
- Bach Institute of Biochemistry, Federal Research Center "Fundamental Bases of Biotechnology" of the Russian Academy of Sciences, Moscow, 119071, Russia
| | - Galina P Shumakovich
- Bach Institute of Biochemistry, Federal Research Center "Fundamental Bases of Biotechnology" of the Russian Academy of Sciences, Moscow, 119071, Russia
| | - Elena A Zaitseva
- Faculty of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Alexander I Yaropolov
- Bach Institute of Biochemistry, Federal Research Center "Fundamental Bases of Biotechnology" of the Russian Academy of Sciences, Moscow, 119071, Russia.
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11
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Aouaini F, Dhaouadi F, Sellaoui L, Badawi M, Bonilla-Petriciolet A, Lamine AB. Using an enhanced multilayer model to analyze the performance of nickel alginate/graphene oxide aerogel, nickel alginate aerogel/activated carbon, and activated carbon in the adsorption of a textile dye pollutant. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:63622-63628. [PMID: 35460487 DOI: 10.1007/s11356-022-20343-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 04/14/2022] [Indexed: 06/14/2023]
Abstract
This work describes the modeling and analysis of methylene blue molecule on different adsorbents, namely, nickel alginate/graphene oxide (NA/GO) aerogel, nickel alginate/activated carbon (NA/AC) aerogel, and Trichosanthes kirilowii maxim shell activated carbon (TKAC). A multilayer statistical physics model was used to calculate the energetic and steric parameters of the adsorption of methylene blue on these adsorbents. Based on the modeling investigation, it was concluded that the formation of multiple dye adsorbed layers on these adsorbents could be feasible where physical adsorption interactions could be involved. Adsorption capacities at saturation of these adsorbents ranged from 542.97 to 470.03 mg/g, 790.66 to 684.47 mg/g, and 401.11 to 1236.24 mg/g for NA-GO aerogel, NA-AC aerogel, and TKAC, respectively. This research contributes with new findings for the understanding of dye adsorption on novel materials, which can be used in water pollution control.
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Affiliation(s)
- Fatma Aouaini
- Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh, 11671, Saudi Arabia
| | - Fatma Dhaouadi
- Laboratory of Quantum and Statistical Physics, Faculty of Sciences of Monastir, Monastir University, LR18ES18, Monastir, Tunisia
| | - Lotfi Sellaoui
- Laboratory of Quantum and Statistical Physics, Faculty of Sciences of Monastir, Monastir University, LR18ES18, Monastir, Tunisia.
| | - Michael Badawi
- Laboratoire de Physique Et Chimie Théoriques LPCT UMR CNRS 7019, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | | | - Abdelmottaleb Ben Lamine
- Laboratory of Quantum and Statistical Physics, Faculty of Sciences of Monastir, Monastir University, LR18ES18, Monastir, Tunisia
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12
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Effect of starch initial moisture on thermoplastic starch film properties and its performance as agricultural mulch film. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03150-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Baran A, Fričová O, Vrábel P, Popovič Ľ, Peidayesh H, Chodák I, Hutníková M, Kovaľaková M. Effects of urea and glycerol mixture on morphology and molecular mobility in thermoplastic starch/montmorillonite-type nanofiller composites studied using XRD and NMR. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03110-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Preparation and characterization of crosslinked starch films pretreated with sodium hydroxide/amide/water solvent system. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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15
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Applications of Starch Biopolymers for a Sustainable Modern Agriculture. SUSTAINABILITY 2022. [DOI: 10.3390/su14106085] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Protected cultivation in modern agriculture relies extensively on plastic-originated mulch films, nets, packaging, piping, silage, and various applications. Polyolefins synthesized from petrochemical routes are vastly consumed in plasticulture, wherein PP and PE are the dominant commodity plastics. Imposing substantial impacts on our geosphere and humankind, plastics in soil threaten food security, health, and the environment. Mismanaged plastics are not biodegradable under natural conditions and generate problematic emerging pollutants such as nano-micro plastics. Post-consumed petrochemical plastics from agriculture face many challenges in recycling and reusing due to soil contamination in fulfilling the zero waste hierarchy. Hence, biodegradable polymers from renewable sources for agricultural applications are pragmatic as mitigation. Starch is one of the most abundant biodegradable biopolymers from renewable sources; it also contains tunable thermoplastic properties suitable for diverse applications in agriculture. Functional performances of starch such as physicomechanical, barrier, and surface chemistry may be altered for extended agricultural applications. Furthermore, starch can be a multidimensional additive for plasticulture that can function as a filler, a metaphase component in blends/composites, a plasticizer, an efficient carrier for active delivery of biocides, etc. A substantial fraction of food and agricultural wastes and surpluses of starch sources are underutilized, without harnessing useful resources for agriscience. Hence, this review proposes reliable solutions from starch toward timely implementation of sustainable practices, circular economy, waste remediation, and green chemistry for plasticulture in agriscience
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16
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Development of natural rubber with enhanced oxidative degradability. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04240-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Effect of Kenaf Fibre as Reinforcing Fillers in Corn Starch-Based Biocomposite Film. Polymers (Basel) 2022; 14:polym14081590. [PMID: 35458339 PMCID: PMC9029461 DOI: 10.3390/polym14081590] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/24/2022] [Accepted: 04/01/2022] [Indexed: 12/20/2022] Open
Abstract
Biocomposite films were prepared using corn starch (CS), sorbitol as a plasticiser, and multi-scale kenaf fibre as reinforcing filler. The microstructure and the physical, tensile, and water barrier properties of corn starch reinforced with kenaf fibre were characterised and investigated. The biocomposite films were developed via the solution casting technique using 10 g of CS with 0 to 8% kenaf fibre as filler treated with 30% (w/w, starch basis) of sorbitol. The increased amount of kenaf fibre introduced contributed to improvements in film thickness, weight, and density. Conversely, slight reductions in the biocomposite films’ moisture content, water absorption, and solubility rating were 9.86–5.88%, 163.13–114.68%, and 38.98–25.17%, respectively. An X-ray diffraction (XRD) test revealed that the films were amorphous and that there was no effect on the crystallinity structure of films with kenaf fibre reinforcement. Fourier transform infrared (FT-IR) and rheological analysis indicated that kenaf fibre could weaken the molecular interaction of the film matrix. Field emission scanning electron microscope (FESEM) revealed the arrangement and uniform distribution of kenaf fibre at 0.2–0.8%. The incorporation of kenaf increased the tensile strength, Young’s modulus, and elongation at break until (6% wt) of fibre. With the kenaf fibre incorporation, the optimal tensile strength, Young’s modulus, and elongation at break of the films reached 17.74 MPa, 1324.74 MPa, and 48.79%, respectively. Overall, the introduction of kenaf fibre as filler enhanced the physical and mechanical properties of CS films.
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18
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Zhu Y, Mei L, Yin L, Lin L, Du X, Guo L. Complex plasticizer of PEG/water on the gelatinization of corn starch. STARCH-STARKE 2022. [DOI: 10.1002/star.202100258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yu Zhu
- Anhui Engineering Laboratory of Agro‐products Processing Anhui Agricultural University Hefei 230036 China
| | - Liping Mei
- Anhui Engineering Laboratory of Agro‐products Processing Anhui Agricultural University Hefei 230036 China
| | - Liwei Yin
- The Province Key Laboratory of the Biodiversity Study and Ecology Conservation in Southwest College of Life Science Anqing Normal University Anqing Anhui 246133 China
| | - Li Lin
- Anhui Engineering Laboratory of Agro‐products Processing Anhui Agricultural University Hefei 230036 China
| | - Xianfeng Du
- Anhui Engineering Laboratory of Agro‐products Processing Anhui Agricultural University Hefei 230036 China
| | - Li Guo
- State Key Laboratory of Biobased Material and Green Papermaking School of Food Sciences and Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan China
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Biodegradable Thermoplastic Starch/Polycaprolactone Blends with Co-Continuous Morphology Suitable for Local Release of Antibiotics. MATERIALS 2022; 15:ma15031101. [PMID: 35161043 PMCID: PMC8840403 DOI: 10.3390/ma15031101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Revised: 01/21/2022] [Accepted: 01/28/2022] [Indexed: 12/10/2022]
Abstract
We report a reproducible preparation and characterization of highly homogeneous thermoplastic starch/pol(ε‑caprolactone) blends (TPS/PCL) with a minimal thermomechanical degradation and co-continuous morphology. These materials would be suitable for biomedical applications, specifically for the local release of antibiotics (ATB) from the TPS phase. The TPS/PCL blends were prepared in the whole concentration range. In agreement with theoretical predictions based on component viscosities, the co-continuous morphology was found for TPS/PCL blends with a composition of 70/30 wt.%. The minimal thermomechanical degradation of the blends was achieved by an optimization of the processing conditions and by keeping processing temperatures as low as possible, because higher temperatures might damage ATB in the final application. The blends’ homogeneity was verified by scanning electron microscopy. The co-continuous morphology was confirmed by submicron-computed tomography. The mechanical performance of the blends was characterized in both microscale (by an instrumented microindentation hardness testing; MHI) and macroscale (by dynamic thermomechanical analysis; DMTA). The elastic moduli of TPS increased ca four times in the TPS/PCL (70/30) blend. The correlations between elastic moduli measured by MHI and DMTA were very strong, which implied that, in the future studies, it would be possible to use just micromechanical testing that does not require large specimens.
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20
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Skowrońska D, Wilpiszewska K. Deep Eutectic Solvents for Starch Treatment. Polymers (Basel) 2022; 14:polym14020220. [PMID: 35054627 PMCID: PMC8778038 DOI: 10.3390/polym14020220] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 12/13/2021] [Accepted: 01/04/2022] [Indexed: 02/02/2023] Open
Abstract
In this review, the application of deep eutectic solvents (DESs) as starch solvents, plasticizers and for other treatment has been described. Starch, as one of the most abundant biopolymers, is considered for forming new biodegradable materials. This new approach, referring to applying deep eutectic solvents for dissolving starch, its plasticization and other modifications, was presented. A DES could be a good alternative for common starch plasticizers (e.g., glycerol, urea) as well as recently considered ionic liquids. The high variety of DES component combinations makes it possible to obtain materials with the properties specific for given applications.
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21
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Tedeschi AM, Di Caprio F, Piozzi A, Pagnanelli F, Francolini I. Sustainable Bioactive Packaging Based on Thermoplastic Starch and Microalgae. Int J Mol Sci 2021; 23:ijms23010178. [PMID: 35008606 PMCID: PMC8745059 DOI: 10.3390/ijms23010178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 12/21/2021] [Accepted: 12/21/2021] [Indexed: 12/11/2022] Open
Abstract
This study combines the use of corn starch and Tetradesmus obliquus microalgae for the production of antioxidant starch films as flexible packaging material. Starch was plasticized with glycerol and blended with 1 w% polyallylamine chosen as an agent to modify the film physical properties. The addition of polyallylamine improved film water stability and water vapor transmission rate as well as mechanical stiffness and tenacity. The dried Tetradesmus obliquus microalgae, which showed an EC50 value of 2.8 mg/mg DPPH (2.2-Diphenyl-1-picrylhydrazyl radical), was then used as antioxidant filler. The addition of microalgae provided the films with good antioxidant activity, which increased with microalgae content increasing. To our knowledge, this is the first study reporting the development of sustainable bioactive packaging films composed of almost 100% starch, and follows the European union's goals on plastics strategy concerning the promotion of bio-based, compostable plastics and the setting up of approaches to prevent food waste with a simple plastic packaging.
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22
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Starch phosphate carbamate hydrogel based slow-release urea formulation with good water retentivity. Int J Biol Macromol 2021; 190:189-197. [PMID: 34499949 DOI: 10.1016/j.ijbiomac.2021.08.234] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 08/29/2021] [Accepted: 08/31/2021] [Indexed: 11/24/2022]
Abstract
In this work, a novel starch phosphate carbamate hydrogel (SPC-Hydrogel) and its corresponding urea hydrogel (SPCU-Hydrogel) slow-release fertilizer (SRF) were prepared by one-step free radical copolymerization of SPC and acrylamide (AM) without and with urea addition. A series of characterization measurements including FTIR, XRD, EDS, XPS are utilized to confirm the successful formation of the SPC-Hydrogel. The SEM shows SPC-Hydrogel has a porous three-dimensional network architecture. Furthermore, SPC-Hydrogel matrix exhibits superior water absorbency achieving 80.2 g/g than that (70.5 g/g) of the native starch hydrogel (NS-Hydrogel) and desirable water retention capacity in soil with a weight loss of only 48% for 13 days. Compared with pure urea and NS based urea hydrogel (NSU-Hydrogel), the SPCU-Hydrogel releases 50.3% for 15 h, achieving an almost complete release more than 25 h in aqueous phase. While only 46.6% of urea is released in 20 days which extends about 30 days in soil column assays. The maize seedlings growth assays also present an intuitive evaluation on the prominent soil water holding and plant growth promotion role of SPCU-Hydrogel. In conclusion, the present work has demonstrated a novel strategy via preparing biomass hydrogel SRF to enhance the utilization effectiveness of fertilizer and retain soil humidity.
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23
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Characterization the structural property and degradation behavior of corn starch in KOH/thiourea aqueous solution. Carbohydr Polym 2021; 270:118363. [PMID: 34364608 DOI: 10.1016/j.carbpol.2021.118363] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 06/14/2021] [Accepted: 06/16/2021] [Indexed: 11/20/2022]
Abstract
Finding an efficient and eco-friendly solution for starch dissolution has attracted considerable attentions in recent years. This study investigated the structural characteristics, and degradation behavior of corn starch in KOH/thiourea aqueous solution by the comparison with DMSO/LiBr and 1-allyl-3-methylimidazolium chloride (AMIMCl). Results showed that KOH/thiourea solution was an effective solvent for corn starch dissolution (30 min with 97.01% solubility). X-ray diffraction (XRD) and 13C CP-MAS NMR spectroscopy revealed that native crystallinity of the corn starch was altered by all tested solvents, especially DMSO/LiBr and AMIMCl. Conversely, this new solvent did not change the primary molecular structure, chain-length distribution, or thermal stability of starch, compared with the native starch. Furthermore, KOH/thiourea solution was more suitable for measuring the molecular weight of corn starch, with a weight-average molecular weight (Mw) of 7.18 × 107 g/mol. Therefore, KOH/thiourea solution is a promising novel solvent for starch dissolution and structural exploration.
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24
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Development and Characterization of Cornstarch-Based Bioplastics Packaging Film Using a Combination of Different Plasticizers. Polymers (Basel) 2021; 13:polym13203487. [PMID: 34685246 PMCID: PMC8539400 DOI: 10.3390/polym13203487] [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: 08/19/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 01/14/2023] Open
Abstract
This work aims to develop cornstarch (CS) based films using fructose (F), glycerol (G), and their combination (FG) as plasticizers with different ratios for food packaging applications. The findings showed that F-plasticized film had the lowest moisture content, highest crystallinity among all films, and exhibited the highest tensile strength and thermostability. In contrast, G-plasticized films showed the lowest density and water absorption with less crystallinity compared to the control and the other plasticized film. In addition, SEM results indicated that FG-plasticized films had a relatively smoother and more coherent surface among the tested films. The findings have also shown that varying the concentration of the plasticizers significantly affected the different properties of the plasticized films. Therefore, the selection of a suitable plasticizer at an appropriate concentration may significantly optimize film properties to promote the utilization of CS films for food packaging applications.
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25
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Liu H, Guo L, Tao S, Huang Z, Qi H. Freely Moldable Modified Starch as a Sustainable and Recyclable Plastic. Biomacromolecules 2021; 22:2676-2683. [PMID: 34043319 DOI: 10.1021/acs.biomac.1c00361] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Efficiently preparing a starch-based plastic with moisture insensitivity and toughness is a challenge to improve the high-value utilization of polysaccharide resources. Herein, a sustainable, recyclable starch-based plastic was prepared in a facile and eco-friendly way. First, starch acetoacetate (SAA) with different degrees of substitution (DSs) was synthesized by transesterification. Then, the SAA film was obtained through a solvent-free hot-pressing method. Notably, SAA with different DSs exhibited various glass transition temperatures (109-140 °C), and SAA with high DS (>0.84) was insoluble even after boiling in water for 1 h. Also, the maximum fracture strength of SAA film up to 15.5 MPa and a maximum elongation at break up to 30% were reached . In addition, the starch-based plastic film retained the original mechanical properties after three cycles of hot processing. In consideration of the facile preparation process, this protocol provided a new avenue for developing sustainable and recyclable starch-based plastics.
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Affiliation(s)
- Hongchen Liu
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.,College of Textiles, Zhongyuan University of Technology, Zhengzhou 450007, China
| | - Lei Guo
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Shenming Tao
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Zhongyuan Huang
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Haisong Qi
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
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26
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Zdanowicz M. Deep eutectic solvents based on urea, polyols and sugars for starch treatment. Int J Biol Macromol 2021; 176:387-393. [PMID: 33581201 DOI: 10.1016/j.ijbiomac.2021.02.039] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 01/29/2021] [Accepted: 02/04/2021] [Indexed: 11/25/2022]
Abstract
Deep eutectic solvents (DES) based on urea (U), polyols (glycerol -G, sorbitol - S) and monosugars (glucose - Glu, fructose - Fru) were obtained, thermally characterized and used for potato starch treatment: dissolution and plasticization. The polysaccharide was dissolved in U/glycerol mixtures forming transparent, non-retrograded gels. The dissolution process was confirmed by microscopic observations and DSC analysis. Plasticizing efficiency of DES in thermoplasticized starch (TPS) via compression molding was investigated using mechanical tests, DMTA, XRD, TGA and FTIR analysis. Although all studied DES were able to plasticize starch effectively, the most flexible films were with urea/glycerol mixture: the highest elongation at break exceed 200%. XRD analysis confirmed high amorphization of starch with the urea-based DES after thermocompression. Moreover, introduction of urea as DES inhibited its recrystallization in the polysaccharide matrix.
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Affiliation(s)
- Magdalena Zdanowicz
- West Pomeranian University of Technology Szczecin, Faculty of Food Sciences and Fisheries, Center of Bioimmobilisation and Innovative Packaging Materials, Janickiego 35, 71-270 Szczecin, Poland; West Pomeranian University of Technology, Szczecin, Faculty of Chemical Technology and Engineering, Polymer Institute, ul. Pulaskiego 10, 70-322 Szczecin, Poland.
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Šmídová N, Šoltýs A, Hronský V, Olčák D, Popovič Ľ, Chodák I. Aging‐induced structural relaxation in cornstarch plasticized with urea and glycerol. J Appl Polym Sci 2020. [DOI: 10.1002/app.50218] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Natália Šmídová
- Department of Physics, Faculty of Electrical Engineering and Informatics Technical University of Košice Košice Slovakia
| | - Alojz Šoltýs
- Department of Physics, Faculty of Electrical Engineering and Informatics Technical University of Košice Košice Slovakia
| | - Viktor Hronský
- Department of Physics, Faculty of Electrical Engineering and Informatics Technical University of Košice Košice Slovakia
| | - Dušan Olčák
- Department of Physics, Faculty of Electrical Engineering and Informatics Technical University of Košice Košice Slovakia
| | - Ľuboš Popovič
- Institute of Metallurgy, Faculty of Materials, Metallurgy and Recycling Technical University of Košice Košice Slovakia
| | - Ivan Chodák
- Polymer Institute Slovak Academy of Sciences Bratislava Slovakia
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Szwengiel A, Kubiak P. Molecular Dispersion of Starch as a Crucial Parameter during Size-Exclusion Chromatography. Foods 2020; 9:E1204. [PMID: 32882800 PMCID: PMC7555438 DOI: 10.3390/foods9091204] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 08/27/2020] [Accepted: 08/27/2020] [Indexed: 01/27/2023] Open
Abstract
Starch, α-polyglucan consisting of a large number of anhydroglucose units joined by α-1,4- and α-1,6-glycosidic bonds, seems to be characterized by a simple structure when compared to other natural polymers. Nevertheless, starches of various botanical origins have different physicochemical properties that are related to the differences in molecular and supramolecular structure of this polymer. In terms of the functional value of starch, the behavior of its macromolecules in solution is the most important result of its structural features. Extremely high molecular mass is the fundamental structural property of starch. Water, considered simply as a solvent for solubilization, does not provide molecular dispersion of starch without its degradation. The objectives of this study are to characterize the suitability of a new aqueous media (urea/NaOH) for enhancing the dispersion of native corn and potato starches and its effect on the consequent size-exclusion chromatography (SEC) analysis. The results were referred to other aqueous base solvents used for dispersing starch (NaOH and KOH). The samples were separated using SEC with triple detection and phosphate buffer (pH 8.0) with urea as the eluent. The characteristics of tested normal and waxy starches were compared. The results revealed that urea/NaOH did not degrade starch during the dispersion process. The recovery of starches, however, was not higher than 42%. These results prove that while the urea/NaOH solvent allows to obtain cold-water-soluble starch, the degree of disintegration of the intramolecular interactions of amylopectin chains is still insufficient.
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Affiliation(s)
- Artur Szwengiel
- Institute of Food Technology of Plant Origin, Faculty of Food Science and Nutrition, Poznań University of Life Sciences, Wojska Polskiego 31, 60–624 Poznań, Poland
| | - Piotr Kubiak
- Department of Biotechnology and Food Microbiology, Poznań University of Life Sciences, 60–627 Poznań, Poland;
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29
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Yang F, Yu X, Shao W, Guo P, Cao S, Wang M, Wang Y, Wu C, Xu Y. Co-delivery of terbinafine hydrochloride and urea with an in situ film-forming system for nail targeting treatment. Int J Pharm 2020; 585:119497. [PMID: 32504773 DOI: 10.1016/j.ijpharm.2020.119497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 05/20/2020] [Accepted: 05/31/2020] [Indexed: 10/24/2022]
Abstract
Onychomycosis is a chronic nail disorder consisting of a fungal infection that causes physical and psychosocial discomfort to patients. However, its treatment remains challenging owing to the barrier of the highly keratinized nail plate and the short time that conventional formulations reside on nails. In this work, we developed an in situ film-forming system(IFFS) based on Eudragit® RLPO to co-deliver terbinafine hydrochloride (TBH) and urea, i.e., TBH-urea-RLPO IFFS, with the aim of overcoming the nail barrier, prolonging the residence time, and efficiently treating onychomycosis. The IFFS formulation formed a thin film with good appearance and adhesion upon application in situ. The physical states of TBH and urea in the film were evaluated with polarization microscopy and powder X-ray diffraction. TBH and urea were both amorphousmiscible components within the RLPO film. TBH release from TBH-urea-RLPO IFFS fitted to the Korsmeyer-Pappas model, and the cumulative release at 72 h was significantly higher than that from commercial preparations (Lamisil Pedisan® once). In vitro permeation of TBH from TBH-urea-RLPO IFFS through bovine hoof membranes was evaluated in comparison with the film containing TBH alone (TBH-RLPO) and commercial preparations. The retention and cumulative permeated amount of TBH were significantly enhanced for the TBH-urea-RLPO IFFS (170.80 ± 44.63 μg/cm2vs 75.49 ± 21.50 μg/cm2vs 60.25 ± 27.38 μg/cm2; 61.81 ± 16.09 μg/cm2vs 21.80 ± 11.56 μg/cm2vs 7.91 ± 1.03 μg/cm2, respectively), and the membranes treated with different formulations were observed with SEM and FTIR to identify the denaturing effect of urea on bovine hoof keratin. In vitro antifungal tests against Trichophyton rubrum,Microsporum canis, Fusarium, and Aspergillus fumigatus were cultured on Muller-Hinton agar; the findings indicated that TBH-urea-RLPO IFFS enhanced TBH antifungal activity. Overall, the results support that TBH-urea-RLPO IFFS is an efficient and promising approach for onychomycosis targeting treatment.
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Affiliation(s)
- Fengdie Yang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Xiuming Yu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Weiyan Shao
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Penghao Guo
- Department of Clinical Laboratory, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Sisi Cao
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Meng Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Yixuan Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Chuanbin Wu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Yuehong Xu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
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Abera G, Woldeyes B, Demash HD, Miyake G. The effect of plasticizers on thermoplastic starch films developed from the indigenous Ethiopian tuber crop Anchote (Coccinia abyssinica) starch. Int J Biol Macromol 2020; 155:581-587. [PMID: 32234440 PMCID: PMC7271630 DOI: 10.1016/j.ijbiomac.2020.03.218] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 11/25/2022]
Abstract
Anchote (Coccinia abyssinica) starch films were prepared by a solution casting method with glycerol, 1-ethyl-3-methylimidazolium acetate, sorbitol or triethylene glycol as plasticizers. The effect of these plasticizers and their concentration on film microstructure, thermal, and mechanical properties was investigated. Scanning electron microscopy revealed that regardless of plasticizer type, films possessing higher plasticizer content had more homogeneous morphologies than those with lower plasticizer content. The FTIR spectra of films plasticized with 1-ethyl-3-methylimidazolium acetate had higher intensity peaks at 3150, 1400 and 1000 cm-1 when compared to other film peaks. These data show that 1-ethyl-3-methylimidazolium acetate plasticized films have decreased molecular order which results in less hydrogen bonding. For this reason, films developed from 1-ethyl-3-methylimidazolium acetate were more flexible than the others. The effect of plasticizers on the thermal properties of the anchote starch films was investigated using thermogravimetric analysis (TGA). Films made from 30% (w/w) plasticizer concentration exhibited higher thermal stability for all types of plasticizer. Mechanical testing showed that sorbitol films had the highest tensile strength, approximately 2 times that of the triethylene glycol plasticized film and 3 times that of the film made from 1-ethyl-3-methylimidazolium acetate.
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Affiliation(s)
- Getnet Abera
- School of Chemical and Bio-Engineering, Institute of Technology, Addis Ababa University, P.O Box 385, King George VI Street, Addis Ababa, Ethiopia; Department of Chemistry, College of Natural Science, Colorado State University, 301West Pitkin Street, Fort Collins, CO 80523, USA
| | - Belay Woldeyes
- School of Chemical and Bio-Engineering, Institute of Technology, Addis Ababa University, P.O Box 385, King George VI Street, Addis Ababa, Ethiopia
| | - Hundessa Dessalegn Demash
- School of Chemical and Bio-Engineering, Institute of Technology, Addis Ababa University, P.O Box 385, King George VI Street, Addis Ababa, Ethiopia
| | - Garret Miyake
- Department of Chemistry, College of Natural Science, Colorado State University, 301West Pitkin Street, Fort Collins, CO 80523, USA.
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31
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Zhang K, Su T, Cheng F, Lin Y, Zhou M, Zhu P, Li R, Wu D. Effect of sodium citrate/polyethylene glycol on plasticization and retrogradation of maize starch. Int J Biol Macromol 2020; 154:1471-1477. [DOI: 10.1016/j.ijbiomac.2019.11.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 11/03/2019] [Accepted: 11/05/2019] [Indexed: 10/25/2022]
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32
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Fričová O, Hutníková M, Kovaľaková M, Baran A. Influence of aging on molecular motion in PBAT-thermoplastic starch blends studied using solid-state NMR. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2020. [DOI: 10.1080/1023666x.2020.1783495] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Oľga Fričová
- Faculty of Electrical Engineering and Informatics, Department of Physics, Technical University of Košice, Košice, Slovakia
| | - Mária Hutníková
- Faculty of Electrical Engineering and Informatics, Department of Physics, Technical University of Košice, Košice, Slovakia
| | - Mária Kovaľaková
- Faculty of Electrical Engineering and Informatics, Department of Physics, Technical University of Košice, Košice, Slovakia
| | - Anton Baran
- Faculty of Electrical Engineering and Informatics, Department of Physics, Technical University of Košice, Košice, Slovakia
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33
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Antiplasticization of Polymer Materials: Structural Aspects and Effects on Mechanical and Diffusion-Controlled Properties. Polymers (Basel) 2020; 12:polym12040769. [PMID: 32244603 PMCID: PMC7240542 DOI: 10.3390/polym12040769] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/17/2020] [Accepted: 03/26/2020] [Indexed: 11/17/2022] Open
Abstract
Antiplasticization of glassy polymers, arising from the addition of small amounts of plasticizer, was examined to highlight the developments that have taken place over the last few decades, aiming to fill gaps of knowledge in the large number of disjointed publications. The analysis includes the role of polymer/plasticizer molecular interactions and the conditions leading to the cross-over from antiplasticization to plasticization. This was based on molecular dynamics considerations of thermal transitions and related relaxation spectra, alongside the deviation of free volumes from the additivity rule. Useful insights were gained from an analysis of data on molecular glasses, including the implications of the glass fragility concept. The effects of molecular packing resulting from antiplasticization are also discussed in the context of physical ageing. These include considerations on the effects on mechanical properties and diffusion-controlled behaviour. Some peculiar features of antiplasticization regarding changes in Tg were probed and the effects of water were examined, both as a single component and in combination with other plasticizers to illustrate the role of intermolecular forces. The analysis has also brought to light the shortcomings of existing theories for disregarding the dual cross-over from antiplasticization to plasticization with respect to modulus variation with temperature and for not addressing failure related properties, such as yielding, crazing and fracture toughness.
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Giroto AS, Garcia RH, Colnago LA, Klamczynski A, Glenn GM, Ribeiro C. Role of urea and melamine as synergic co-plasticizers for starch composites for fertilizer application. Int J Biol Macromol 2020; 144:143-150. [DOI: 10.1016/j.ijbiomac.2019.12.094] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 12/05/2019] [Accepted: 12/11/2019] [Indexed: 10/25/2022]
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35
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Zhang K, Wang R, Zhang K, Cheng F, Tian Y, Lin Y, Zhou M, Zhu P. Effect of hyperbranched poly(citric polyethylene glycol) with various polyethylene glycol chain lengths on starch plasticization and retrogradation. POLYM INT 2019. [DOI: 10.1002/pi.5946] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kang Zhang
- College of Biomass Science and EngineeringSichuan University Chengdu China
| | - Rong‐rong Wang
- School of Resource and Environmental ScienceWuhan University Wuhan China
| | - Kai‐rui Zhang
- College of Biomass Science and EngineeringSichuan University Chengdu China
| | - Fei Cheng
- College of Biomass Science and EngineeringSichuan University Chengdu China
| | - Yu Tian
- College of Biomass Science and EngineeringSichuan University Chengdu China
| | - Yi Lin
- College of Biomass Science and EngineeringSichuan University Chengdu China
| | - Mi Zhou
- College of Biomass Science and EngineeringSichuan University Chengdu China
| | - Pu‐xin Zhu
- College of Biomass Science and EngineeringSichuan University Chengdu China
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36
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Chen H, Chen L, Dang X, Shan Z, Dai R, Wang Y. The structure and properties of granular cold-water-soluble starch by a NaOH/urea aqueous solution. Int J Biol Macromol 2019; 141:732-737. [DOI: 10.1016/j.ijbiomac.2019.08.226] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 08/26/2019] [Accepted: 08/27/2019] [Indexed: 10/26/2022]
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37
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Crystal structure transformations in extruded starch plasticized with glycerol and urea. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02999-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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38
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Potential of using multiscale corn husk fiber as reinforcing filler in cornstarch-based biocomposites. Int J Biol Macromol 2019; 139:596-604. [DOI: 10.1016/j.ijbiomac.2019.08.015] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Revised: 07/26/2019] [Accepted: 08/01/2019] [Indexed: 11/21/2022]
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39
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Šoltýs A, Hronský V, Šmídová N, Olčák D, Ivanič F, Chodák I. Solid-state 1H and 13C NMR of corn starch plasticized with glycerol and urea. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.04.042] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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40
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Versino F, Urriza M, García MA. Eco-compatible cassava starch films for fertilizer controlled-release. Int J Biol Macromol 2019; 134:302-307. [DOI: 10.1016/j.ijbiomac.2019.05.037] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 04/30/2019] [Accepted: 05/05/2019] [Indexed: 01/22/2023]
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41
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Ibrahim M, Sapuan S, Zainudin E, Zuhri M. Physical, thermal, morphological, and tensile properties of cornstarch-based films as affected by different plasticizers. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2019. [DOI: 10.1080/10942912.2019.1618324] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- M.I.J. Ibrahim
- Advanced Engineering Materials and Composites Research Centre, Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- Department of Mechanical and Manufacturing Engineering, Sabha University, sabha, Libya
| | - S.M. Sapuan
- Advanced Engineering Materials and Composites Research Centre, Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- Biocomposite Technology, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - E.S. Zainudin
- Advanced Engineering Materials and Composites Research Centre, Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - M.Y.M. Zuhri
- Advanced Engineering Materials and Composites Research Centre, Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
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42
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Zdanowicz M, Jędrzejewski R, Pilawka R. Deep eutectic solvents as simultaneous plasticizing and crosslinking agents for starch. Int J Biol Macromol 2019; 129:1040-1046. [DOI: 10.1016/j.ijbiomac.2019.02.103] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 01/29/2019] [Accepted: 02/16/2019] [Indexed: 11/16/2022]
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43
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Effect of hyperbranched poly(trimellitic glyceride) with different molecular weight on starch plasticization and compatibility with polyester. Carbohydr Polym 2018; 195:107-113. [DOI: 10.1016/j.carbpol.2018.04.080] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Revised: 04/19/2018] [Accepted: 04/21/2018] [Indexed: 11/18/2022]
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44
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Zhang K, Zhang K, Cheng F, Lin Y, Zhou M, Zhu P. Aging properties and hydrophilicity of maize starch plasticized by hyperbranched poly(citrate glyceride). J Appl Polym Sci 2018. [DOI: 10.1002/app.46899] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kang Zhang
- Textile Institute; Sichuan University; Chengdu 610065 China
| | - Kairui Zhang
- Textile Institute; Sichuan University; Chengdu 610065 China
| | - Fei Cheng
- Textile Institute; Sichuan University; Chengdu 610065 China
| | - Yi Lin
- Textile Institute; Sichuan University; Chengdu 610065 China
| | - Mi Zhou
- Textile Institute; Sichuan University; Chengdu 610065 China
| | - Puxin Zhu
- Textile Institute; Sichuan University; Chengdu 610065 China
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45
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Naderizadeh S, Shakeri A, Mahdavi H, Nikfarjam N, Taheri Qazvini N. Hybrid Nanocomposite Films of Starch, Poly(vinyl alcohol) (PVA), Starch Nanocrystals (SNCs), and Montmorillonite (Na-MMT): Structure-Properties Relationship. STARCH-STARKE 2018. [DOI: 10.1002/star.201800027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sara Naderizadeh
- Polymer Division; School of Chemistry; College of Science; University of Tehran; PO Box 14155-6455 Tehran Iran
| | - Alireza Shakeri
- Polymer Division; School of Chemistry; College of Science; University of Tehran; PO Box 14155-6455 Tehran Iran
| | - Hossein Mahdavi
- Polymer Division; School of Chemistry; College of Science; University of Tehran; PO Box 14155-6455 Tehran Iran
| | - Nasser Nikfarjam
- Department of Chemistry; Institute for Advanced Studies in Basic Sciences (IASBS); 45137-66731 Zanjan Iran
| | - Nader Taheri Qazvini
- Polymer Division; School of Chemistry; College of Science; University of Tehran; PO Box 14155-6455 Tehran Iran
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46
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Zhang K, Cheng X, Cheng F, Lin Y, Zhou M, Zhu P. Poly(citrate glyceride): a hyperbranched polyester for starch plasticization. POLYM INT 2018. [DOI: 10.1002/pi.5520] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kang Zhang
- Textile Institute; Sichuan University; Chengdu China
| | - XiaoPing Cheng
- Fujian Province Zhenghe County Mining Company Limited; Nanping China
| | - Fei Cheng
- Textile Institute; Sichuan University; Chengdu China
| | - Yi Lin
- Textile Institute; Sichuan University; Chengdu China
| | - Mi Zhou
- Textile Institute; Sichuan University; Chengdu China
| | - PuXin Zhu
- Textile Institute; Sichuan University; Chengdu China
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47
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Mallakpour S, Rashidimoghadam S. Application of ultrasonic irradiation as a benign method for production of glycerol plasticized-starch/ascorbic acid functionalized MWCNTs nanocomposites: Investigation of methylene blue adsorption and electrical properties. ULTRASONICS SONOCHEMISTRY 2018; 40:419-432. [PMID: 28946442 DOI: 10.1016/j.ultsonch.2017.07.032] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Revised: 07/23/2017] [Accepted: 07/24/2017] [Indexed: 06/07/2023]
Abstract
A solution mixing and ultrasonic dispersion method as a green, the fast, inexpensive and effective technique was utilized to prepare glycerol plasticized-starch (GPS)/ascorbic acid (AA)-MWCNTs nanocomposites (NCs) via the introduction of various amounts of AA-MWCNTs (3, 6 and 9wt%) as filler into GPS matrix. The GPS was synthesized by addition of glycerol (50%) as a plasticizer to starch which enhances its flexibility. Characterization of the obtained GPS/AA-MWCNTs NCs was accomplished by different techniques. The optimum filler content for the generation of fine electrical conductivity and good mechanical properties was found to be about 3wt%. The distribution of AA-MWCNTs at the low content (3wt%) in the GPS matrix was better due to the strong linkage between nanofiller and GPS in GPS/AA-MWCNTs NC. The results of adsorption studies showed that the fabricated NC can be a good adsorbent for removal of methylene blue (MB) dye from aqueous solutions.
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Affiliation(s)
- Shadpour Mallakpour
- Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran; Nanotechnology and Advanced Materials Institute, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran.
| | - Shima Rashidimoghadam
- Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran
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48
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Menzel C, Seisenbaeva G, Agback P, Gällstedt M, Boldizar A, Koch K. Wheat starch carbamate: Production, molecular characterization, and film forming properties. Carbohydr Polym 2017; 172:365-373. [DOI: 10.1016/j.carbpol.2017.05.053] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 05/02/2017] [Accepted: 05/18/2017] [Indexed: 10/19/2022]
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49
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Selvanathan V, Azzahari AD, Abd. Halim AA, Yahya R. Ternary natural deep eutectic solvent (NADES) infused phthaloyl starch as cost efficient quasi-solid gel polymer electrolyte. Carbohydr Polym 2017; 167:210-218. [DOI: 10.1016/j.carbpol.2017.03.023] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 03/07/2017] [Accepted: 03/08/2017] [Indexed: 10/20/2022]
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50
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Naz MY, Sulaiman SA. Attributes of natural and synthetic materials pertaining to slow-release urea coating industry. REV CHEM ENG 2017. [DOI: 10.1515/revce-2015-0065] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractUrea is one of the spirited input materials for plant growth. However, more than half of conventional urea applied to the soil may not reach the plants and be washed off by rain and irrigation water. The high lost proportion results not only in economic losses but also in environmental pollution. Alleviation in cost and nitrogen pollution is possible by mitigating the nitrogen release rate and synchronizing it with the plant’s need. A wide range of synthetic and natural materials are being tested for production of slow-release fertilizers. Each one of these materials has its own merits, with accompanying disadvantages. This study critically reviews the most featured natural and synthetic materials pertaining to the slow-release urea industry. The focused review was aimed at elaborating the benefits and limitations of polymeric and nonpolymeric coating materials, release mechanism of conventional and coated urea, methods to characterize the coated urea, slow-release characteristics imparted by a coating to the coated urea, and release patterns of conventional and coated urea. This discussion was further extended to commercially available coatings and slow-release potential of superabsorbent, urethane, and starch-based coatings.
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