51
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Lee D, Sun Y, Youe W, Gwon J, Cheng HN, Wu Q. 3D‐printed wood‐polylactic acid‐thermoplastic
starch composites: Performance features in relation to biodegradation treatment. J Appl Polym Sci 2021. [DOI: 10.1002/app.50914] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Danbee Lee
- School of Renewable Natural Resources Louisiana State University AgCenter Baton Rouge Louisiana USA
| | - Yufeng Sun
- School of Renewable Natural Resources Louisiana State University AgCenter Baton Rouge Louisiana USA
- Collaborative Innovation Center of Biomass Energy, College of Mechanical and Electrical Engineering Henan Agricultural University Zhengzhou China
| | - Won‐Jae Youe
- Forest Products Department National Institute of Forest Science Seoul South Korea
| | - Jaegyoung Gwon
- Forest Products Department National Institute of Forest Science Seoul South Korea
| | - Huai N. Cheng
- Southern Regional Research Center USDA Agriculture Research Service New Orleans Louisiana USA
| | - Qinglin Wu
- School of Renewable Natural Resources Louisiana State University AgCenter Baton Rouge Louisiana USA
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52
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Gulati K, Lal S, Kumar S, Arora S. Effect of agar and walnut ( Juglans regia.L) shell fibre addition on thermal stability, water barrier, biodegradability and mechanical properties of corn starch composites. Chem Ind 2021. [DOI: 10.1080/00194506.2021.1967205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Kapil Gulati
- Department of Chemistry, Kurukshetra University, Kurukshetra, India
- Department of Chemistry, Dyal Singh College, Karnal, India
| | - Sohan Lal
- Department of Chemistry, Kurukshetra University, Kurukshetra, India
| | - Satish Kumar
- Department of Chemistry, Kurukshetra University, Kurukshetra, India
- Department of Chemistry, Institute of Integrated and Honors studies, Kurukshetra University, Kurukshetra, India
| | - Sanjiv Arora
- Department of Chemistry, Kurukshetra University, Kurukshetra, India
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53
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Madadi R, Maljaee H, Serafim LS, Ventura SPM. Microalgae as Contributors to Produce Biopolymers. Mar Drugs 2021; 19:md19080466. [PMID: 34436305 PMCID: PMC8398342 DOI: 10.3390/md19080466] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/09/2021] [Accepted: 08/16/2021] [Indexed: 12/15/2022] Open
Abstract
Biopolymers are very favorable materials produced by living organisms, with interesting properties such as biodegradability, renewability, and biocompatibility. Biopolymers have been recently considered to compete with fossil-based polymeric materials, which rase several environmental concerns. Biobased plastics are receiving growing interest for many applications including electronics, medical devices, food packaging, and energy. Biopolymers can be produced from biological sources such as plants, animals, agricultural wastes, and microbes. Studies suggest that microalgae and cyanobacteria are two of the promising sources of polyhydroxyalkanoates (PHAs), cellulose, carbohydrates (particularly starch), and proteins, as the major components of microalgae (and of certain cyanobacteria) for producing bioplastics. This review aims to summarize the potential of microalgal PHAs, polysaccharides, and proteins for bioplastic production. The findings of this review give insight into current knowledge and future direction in microalgal-based bioplastic production considering a circular economy approach. The current review is divided into three main topics, namely (i) the analysis of the main types and properties of bioplastic monomers, blends, and composites; (ii) the cultivation process to optimize the microalgae growth and accumulation of important biobased compounds to produce bioplastics; and (iii) a critical analysis of the future perspectives on the field.
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Affiliation(s)
- Rozita Madadi
- Department of Agricultural Biotechnology, University College of Agriculture and Natural Resources, University of Tehran, Karaj 77871-31587, Iran;
| | - Hamid Maljaee
- CICECO—Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal; (H.M.); (L.S.S.)
| | - Luísa S. Serafim
- CICECO—Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal; (H.M.); (L.S.S.)
- Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Sónia P. M. Ventura
- CICECO—Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal; (H.M.); (L.S.S.)
- Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
- Correspondence:
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54
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Alqahtani N, Alnemr T, Ali S. Development of low-cost biodegradable films from corn starch and date palm pits (Phoenix dactylifera). FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2021.101199] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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55
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Direct Powder Extrusion of Paracetamol Loaded Mixtures for 3D Printed Pharmaceutics for Personalized Medicine via Low Temperature Thermal Processing. Pharmaceutics 2021; 13:pharmaceutics13060907. [PMID: 34205280 PMCID: PMC8234073 DOI: 10.3390/pharmaceutics13060907] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/11/2021] [Accepted: 06/16/2021] [Indexed: 01/20/2023] Open
Abstract
Three-dimensional printed drug development is nowadays an active area in the pharmaceutical industry, where the search for an appropriate edible carrier that permits the thermal processing of the mixture at temperature levels that are safe for the drug is an important field of study. Here, potato starch and hydroxypropyl cellulose based mixtures loaded with paracetamol up to 50% in weight were processed by hot melt extrusion at 85 °C to test their suitability to be thermally processed. The extruded mixtures were tested by liquid chromatography to analyze their release curves and were thermally characterized. The drug recovery was observed to be highly dependent on the initial moisture level of the mixture, the samples being prepared with an addition of water at a ratio of 3% in weight proportional to the starch amount, highly soluble and easy to extrude. The release curves showed a slow and steady drug liberation compared to a commercially available paracetamol tablet, reaching the 100% of recovery at 60 min. The samples aged for 6 weeks showed slower drug release curves compared to fresh samples, this effect being attributable to the loss of moisture. The paracetamol loaded mixture in powder form was used to print pills with different sizes and geometries in a fused deposition modelling three-dimensional printer modified with a commercially available powder extrusion head, showing the potential of this formulation for use in personalized medicine.
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56
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Jariyasakoolroj P, Supthanyakul R, Laobuthee A, Lertworasirikul A, Yoksan R, Phongtamrug S, Chirachanchai S. Structure and properties of in situ reactive blend of polylactide and thermoplastic starch. Int J Biol Macromol 2021; 182:1238-1247. [PMID: 33971234 DOI: 10.1016/j.ijbiomac.2021.05.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 04/09/2021] [Accepted: 05/04/2021] [Indexed: 11/27/2022]
Abstract
In this study, in situ reactive extrusion of polylactide and thermoplastic starch modified with chloropropyl trimethoxysilane coupling agent (PLA/mTPS) is proposed. The success of covalent bond formation between PLA matrix and mTPS phase is clarified by two-dimensional nuclear magnetic resonance (2D-NMR) spectroscopy with 1H1H TOCSY mode. This chemically bound PLA with starch gives the remarkable compatibility in the PLA/mTPS film, with not only a decreased glass transition temperature (47 °C) but also an increased crystallinity of PLA (Χc of 50%). It consequently increases oxygen barrier significantly and also enhances the film flexibility as observed from the drastic increase of elongation at break (from 3% to 50%). Moreover, the PLA/mTPS 60/40 (w/w) film exhibits the accelerated degradation as compared with pure PLA film.
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Affiliation(s)
- Piyawanee Jariyasakoolroj
- Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand.
| | - Raksit Supthanyakul
- PTT MCC Biochem Co., Ltd., Energy Complex, B Building, Chatuchak, Bangkok 10900, Thailand
| | - Apirat Laobuthee
- Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
| | - Amornrat Lertworasirikul
- Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
| | - Rangrong Yoksan
- Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand
| | - Suttinun Phongtamrug
- Department of Industrial Chemistry, Faculty of Applied Science, King Mongkut's University of Technology North Bangkok, Bangkok 10800, Thailand
| | - Suwabun Chirachanchai
- The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand; Bioresources Advanced Materials (B2A), The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand.
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57
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Lackner M, Ivanič F, Kováčová M, Chodák I. Mechanical properties and structure of mixtures of poly(butylene-adipate-co-terephthalate) (PBAT) with thermoplastic starch (TPS). INTERNATIONAL JOURNAL OF BIOBASED PLASTICS 2021. [DOI: 10.1080/24759651.2021.1882774] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Maximilian Lackner
- University of Applied Sciences Technikum Wien, Faculty of Industrial Engineering, Wien, Austria
| | - František Ivanič
- Dúbravská cesta 5799/9, 845 41 Karlova Ves, Polymer Institute SAS, Bratislava, Slovakia
| | - Mária Kováčová
- Dúbravská cesta 5799/9, 845 41 Karlova Ves, Polymer Institute SAS, Bratislava, Slovakia
| | - Ivan Chodák
- Dúbravská cesta 5799/9, 845 41 Karlova Ves, Polymer Institute SAS, Bratislava, Slovakia
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58
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Ibáñez-García A, Martínez-García A, Ferrándiz-Bou S. Recyclability Analysis of Starch Thermoplastic/Almond Shell Biocomposite. Polymers (Basel) 2021; 13:polym13071159. [PMID: 33916363 PMCID: PMC8038610 DOI: 10.3390/polym13071159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 03/30/2021] [Accepted: 04/01/2021] [Indexed: 11/24/2022] Open
Abstract
This article is focused on studying the effect of the reprocessing cycles on the mechanical, thermal, and aesthetic properties of a biocomposite. This process is based on starch thermoplastic polymer (TPS) filled with 20 wt% almond shell powder (ASP) and epoxidized linseed oil (ELO) as a compatibilizing additive. To do so, the biocomposite was prepared in a twin-screw extruder, molded by injection, and characterized in terms of its mechanical, thermal, and visual properties (according to CieLab) and the melt flow index (MFI). The analyses carried out were tensile, flexural, Charpy impact tests, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA). The effects of the reprocessing were also studied for the biodegradable unfilled TPS polymer. The results showed that TPS and TPS/ASP biocomposite suffer changes progressively on the properties studied after each reprocessing cycle. Furthermore, it was observed that the addition of ASP intensified these effects regarding TPS. However, in spite of the progressive degradation in both cases, it is technically feasible to reprocess the material at least three times without needing to incorporate virgin material.
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Affiliation(s)
- Ana Ibáñez-García
- AIJU, Technological Institute for Children’s Products & Leisure, 03440 Ibi, Alicante, Spain;
- Correspondence: ; Tel.: +34-965-554-475
| | | | - Santiago Ferrándiz-Bou
- Technological Institute of Materials (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Alicante, Spain;
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59
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Momeni S, Rezvani Ghomi E, Shakiba M, Shafiei-Navid S, Abdouss M, Bigham A, Khosravi F, Ahmadi Z, Faraji M, Abdouss H, Ramakrishna S. The Effect of Poly (Ethylene glycol) Emulation on the Degradation of PLA/Starch Composites. Polymers (Basel) 2021; 13:1019. [PMID: 33806074 PMCID: PMC8036416 DOI: 10.3390/polym13071019] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 03/22/2021] [Accepted: 03/23/2021] [Indexed: 02/07/2023] Open
Abstract
As a hydrophilic renewable polymer, starch has been widely used in biocompatible plastics as a filler for more than two decades. The present study aimed at investigating the effects of polyethylene glycol (PEG), as a plasticizer, on the physicochemical properties of a hybrid composite-polylactic acid (PLA) and thermoplastic starch (TPS). A solvent evaporation process was adopted to gelatinize the starch and disparate PEG contents ranging from 3 to 15 wt.% (with respect to the sample weight) were examined. It was revealed that the increase in the PEG content was accompanied by an increment in the starch gelatinization degree. Referring to the microstructural analyses, the TPS/PLA mixture yielded a ductile hybrid composite with a fine morphology and a uniform phase. Nevertheless, two different solvents, including acetone and ethanol, were used to assess if they had any effect on the hybrid's morphology, tensile strength and thermal properties. It was found that ethanol culminated in a porous hybrid composite with a finer morphology and better starch distribution in the PLA structure than acetone. As the result of PEG addition to the composite, the crystallinity and tensile strength were decreased, whereas the elongation increased. The hydrolytic degradation of samples was assessed under different pH and thermal conditions. Moreover, the microbial degradation of the PLA/TPS hybrid composite containing different PEG molar fractions was investigated in the soil for 45 days. The rate of degradation in both hydrolytic and biodegradation increased in the samples with a higher amount of PEG with ethanol solvent.
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Affiliation(s)
- Sarieh Momeni
- Department of Chemistry, Amirkabir University of Technology, Tehran 15875-4413, Iran; (S.M.); (Z.A.)
| | - Erfan Rezvani Ghomi
- Center for Nanotechnology and Sustainability, Department of Mechanical Engineering, National University of Singapore, Singapore 117581, Singapore;
| | - Mohamadreza Shakiba
- Department of Chemistry, Amirkabir University of Technology, Tehran 15875-4413, Iran; (S.M.); (Z.A.)
| | - Saied Shafiei-Navid
- Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar 47416-95447, Iran;
| | - Majid Abdouss
- Department of Chemistry, Amirkabir University of Technology, Tehran 15875-4413, Iran; (S.M.); (Z.A.)
| | - Ashkan Bigham
- Institute of Polymers, Composites and Biomaterials—National Research Council (IPCB-CNR), Viale J.F. Kennedy 54—Mostra d’Oltremare pad. 20, 80125 Naples, Italy;
| | - Fatemeh Khosravi
- Center for Nanotechnology and Sustainability, Department of Mechanical Engineering, National University of Singapore, Singapore 117581, Singapore;
| | - Zahed Ahmadi
- Department of Chemistry, Amirkabir University of Technology, Tehran 15875-4413, Iran; (S.M.); (Z.A.)
| | - Mehdi Faraji
- School of Chemistry, College of Science, University of Tehran, Tehran 14155-6455, Iran;
| | - Hamidreza Abdouss
- Department of Polymer, Amirkabir University of Technology, Tehran 15875-4413, Iran;
| | - Seeram Ramakrishna
- Center for Nanotechnology and Sustainability, Department of Mechanical Engineering, National University of Singapore, Singapore 117581, Singapore;
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60
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Zarski A, Bajer K, Kapuśniak J. Review of the Most Important Methods of Improving the Processing Properties of Starch toward Non-Food Applications. Polymers (Basel) 2021; 13:832. [PMID: 33803238 PMCID: PMC7967182 DOI: 10.3390/polym13050832] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/25/2021] [Accepted: 03/02/2021] [Indexed: 12/20/2022] Open
Abstract
Starch is the second most abundantly available natural polymer in the world, after cellulose. If we add its biodegradability and non-toxicity to the natural environment, it becomes a raw material very attractive for the food and non-food industries. However, in the latter case, mainly due to the high hydrophilicity of starch, it is necessary to carry out many more or less complex operations and processes. One of the fastest growing industries in the last decade is the processing of biodegradable materials for packaging purposes. This is mainly due to awareness of producers and consumers about the dangers of unlimited production and the use of non-degradable petroleum polymers. Therefore, in the present review, an attempt was made to show the possibilities and limitations of using starch as a packaging material. The most important physicochemical features of this biopolymer are discussed, and special attention is paid to more or less environmentally friendly methods of improving its processing properties.
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Affiliation(s)
- Arkadiusz Zarski
- Department of Dietetics and Food Studies, Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, Armii Krajowej 13/15 Ave., 42-200 Czestochowa, Poland;
| | - Krzysztof Bajer
- Lukasiewicz Research Network—Institute for Engineering of Polymer Materials and Dyes, Marii Sklodowskiej-Curie 55 Str., 87-100 Torun, Poland;
| | - Janusz Kapuśniak
- Department of Dietetics and Food Studies, Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, Armii Krajowej 13/15 Ave., 42-200 Czestochowa, Poland;
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61
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Casamento F, D'Anna A, Arrigo R, Frache A. Rheological behavior and morphology of poly(lactic acid)/low‐density polyethylene blends based on virgin and recycled polymers: Compatibilization with natural surfactants. J Appl Polym Sci 2021. [DOI: 10.1002/app.50590] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Francesco Casamento
- Department of Applied Science and Technology Polytechnic of Turin, INSTM Local Unit Alessandria Italy
| | - Alessandra D'Anna
- Department of Applied Science and Technology Polytechnic of Turin, INSTM Local Unit Alessandria Italy
| | - Rossella Arrigo
- Department of Applied Science and Technology Polytechnic of Turin, INSTM Local Unit Alessandria Italy
| | - Alberto Frache
- Department of Applied Science and Technology Polytechnic of Turin, INSTM Local Unit Alessandria Italy
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62
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Abraham A, Park H, Choi O, Sang BI. Anaerobic co-digestion of bioplastics as a sustainable mode of waste management with improved energy production - A review. BIORESOURCE TECHNOLOGY 2021; 322:124537. [PMID: 33341713 DOI: 10.1016/j.biortech.2020.124537] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/08/2020] [Accepted: 12/08/2020] [Indexed: 05/24/2023]
Abstract
The world of bioplastics has expanded rapidly in recent decades, and the new waste stream generated is creating major barriers to waste processing. Anaerobic co-digestion is to be considered one of the best options for the efficient processing of bioplastic waste due to its minimal space requirements, lower degrees of environmental pollution, and renewable energy generation. The higher carbon to nitrogen (C/N) ratio of bioplastics poses a challenge to anaerobic digestion, but co-digestion with lower C/N ratio biowastes can efficiently degrade bioplastics and improve biogas production in the system. In the future, the collection of organic waste in biodegradable plastic bags makes the waste management process easier for anaerobic digestion plants. The present review paper discusses current trends of bioplastic usage, degradation strategies, and the potential of anaerobic co-digestion for waste management with improved energy production in anaerobic digesters.
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Affiliation(s)
- Amith Abraham
- Department of Chemical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Hyojung Park
- Department of Chemical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Okkyoung Choi
- Department of Chemical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Byoung-In Sang
- Department of Chemical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea.
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63
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Use of Water-Soluble Curcumin in TPS/PBAT Packaging Material: Interference on Reactive Extrusion and Oxidative Stability of Chia Oil. FOOD BIOPROCESS TECH 2021. [DOI: 10.1007/s11947-021-02584-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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64
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A Life Cycle Engineering Perspective on Biocomposites as a Solution for a Sustainable Recovery. SUSTAINABILITY 2021. [DOI: 10.3390/su13031160] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Composite materials, such as carbon fibre reinforced epoxies, provide more efficient structures than conventional materials through light-weighting, but the associated high energy demand during production can be extremely detrimental to the environment. Biocomposites are an emerging material class with the potential to reduce a product’s through-life environmental impact relative to wholly synthetic composites. As with most materials, there are challenges and opportunities with the adoption of biocomposites at the each stage of the life cycle. Life Cycle Engineering is a readily available tool enabling the qualification of a product’s performance, and environmental and financial impact, which can be incorporated in the conceptual development phase. Designers and engineers are beginning to actively include the environment in their workflow, allowing them to play a significant role in future sustainability strategies. This review will introduce Life Cycle Engineering and outline how the concept can offer support in the Design for the Environment, followed by a discussion of the advantages and disadvantages of biocomposites throughout their life cycle.
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65
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Sanders JM, Misra M, Mustard TJL, Giesen DJ, Zhang T, Shelley J, Halls MD. Characterizing moisture uptake and plasticization effects of water on amorphous amylose starch models using molecular dynamics methods. Carbohydr Polym 2021; 252:117161. [PMID: 33183612 DOI: 10.1016/j.carbpol.2020.117161] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 09/03/2020] [Accepted: 09/26/2020] [Indexed: 11/30/2022]
Abstract
Dynamics and thermophysical properties of amorphous starch were explored using molecular dynamics (MD) simulations. Using the OPLS3e force field, simulations of short amylose chains in water were performed to determine force field accuracy. Using well-tempered metadynamics, a free energy map of the two glycosidic angles of an amylose molecule was constructed and compared with other modern force fields. Good agreement of torsional sampling for both solvated and amorphous amylose starch models was observed. Using combined grand canonical Monte Carlo (GCMC)/MD simulations, a moisture sorption isotherm curve is predicted along with temperature dependence. Concentration-dependent activation energies for water transport agree quantitatively with previous experiments. Finally, the plasticization effect of moisture content on amorphous starch was investigated. Predicted glass transition temperature (Tg) depression as a function of moisture content is in line with experimental trends. Further, our calculations provide a value for the dry Tg for amorphous starch, a value which no experimental value is available.
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Affiliation(s)
| | | | | | | | - Teng Zhang
- Schrödinger Inc., New York, NY, 10036, USA
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66
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Ordered long polyvinyl alcohol fiber-reinforced thermoplastic starch composite having comparable mechanical properties with polyethylene and polypropylene. Carbohydr Polym 2020; 250:116913. [PMID: 33049833 DOI: 10.1016/j.carbpol.2020.116913] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 07/07/2020] [Accepted: 08/05/2020] [Indexed: 01/15/2023]
Abstract
A novel strategy is proposed to fabricate ordered long polyvinyl alcohol fiber (PVAF)-reinforced thermoplastic starch (TPS) composites with significantly improved mechanical properties. The PVAFs were uniformly fixed on two rods first; then sandwich-like TPS/fibers/TPS composite films were prepared by hot pressing, and PVAFs (0-4.08 wt%) with the same orientation were added to the composite films. The tensile test demonstrated that the tensile strength of the PVAF/TPS composite film improved from 2.13 MPa for TPS to 20.98 MPa with 4.08 wt% PVAFs, which is higher than the tensile strength of polyethylene (PE) (11.88 MPa) and polypropylene (PP) (19.29 MPa) and ten times higher than that of TPS. The sandwich-like cross-section of the composite film was observed by scanning electron microscopy to prove the better compatibility between PVAF and TPS. The nanoindentation test revealed that the addition of fibers improved the elastic modulus and hardness of the surface of the material. The strengthening mechanism for different PVAF contents was simulated by finite element analysis and attributed to the reduced maximum von Mises stress at the interface between the fiber and the TPS matrix, avoiding the stress concentration and corresponding fracture. This study provides a new way to prepare degradable composite films with suitable mechanical properties to replace PE or PP.
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67
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Yimnak K, Thipmanee R, Sane A. Poly(butylene adipate-co-terephthalate)/thermoplastic starch/zeolite 5A films: Effects of compounding sequence and plasticizer content. Int J Biol Macromol 2020; 164:1037-1045. [PMID: 32693142 DOI: 10.1016/j.ijbiomac.2020.07.169] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 07/03/2020] [Accepted: 07/14/2020] [Indexed: 10/23/2022]
Abstract
This work investigated the effect of the compounding sequence and the glycerol content on poly(butylene adipate-co-terephthalate)/thermoplastic starch/zeolite 5A (PBAT/TPS/Z5A) composites. The composite pellets and films were prepared by an extrusion process using a PBAT:TPS ratio of 60:40, Z5A loading of 3 wt%, and glycerol contents of 35 and 40 parts per hundred parts of starch (phs). Prior to blown film extrusion, the composite pellets were produced by two compounding sequences: sequence I (SI)-mixing PBAT with Z5A prior to blending with TPS; sequence II (SII)-mixing TPS with Z5A before blending with PBAT. The SII compounding sequence provided improved mixing between PBAT and TPS, leading to increased continuous phase region and a reduced TPS dispersed phase size. Increasing the glycerol content decreased the viscosity and size of the TPS dispersed phase and gave rise to a more uniform dispersion of the TPS domains and Z5A particles. Compounding Z5A via the SII sequence with a glycerol content of 40 phs effectively improved the mixing and the performance of the PBAT/TPS blend.
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Affiliation(s)
- Kannika Yimnak
- Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand
| | - Ranumas Thipmanee
- Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand; Center for Advanced Studies for Agriculture and Food (CASAF), Kasetsart University, Bangkok 10900, Thailand
| | - Amporn Sane
- Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand; Center for Advanced Studies for Agriculture and Food (CASAF), Kasetsart University, Bangkok 10900, Thailand.
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Boonsuk P, Sukolrat A, Bourkaew S, Kaewtatip K, Chantarak S, Kelarakis A, Chaibundit C. Structure-properties relationships in alkaline treated rice husk reinforced thermoplastic cassava starch biocomposites. Int J Biol Macromol 2020; 167:130-140. [PMID: 33249147 DOI: 10.1016/j.ijbiomac.2020.11.157] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 11/23/2020] [Accepted: 11/23/2020] [Indexed: 11/28/2022]
Abstract
The study focuses on structure-properties relationships in thermoplastic cassava starch (TPS) based biocomposites comprising 5-20 wt% of untreated and treated rice husk (RH). Alkaline treatment with 11% w/v NaOH removed the hemicellulose layer of RH as confirmed by Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA), and resulted in a larger population of -OH groups exposing on the fibril surface. Consequently, the filler-matrix interactions between treated RH and TPS were enhanced, although Brunauer-Emmett-Teller (BET) surface area analysis indicated that the surface area of treated RH was not increased. Interestingly, the biocomposites contained 20 wt% treated RH showed substantially improved tensile strength by a factor of 220% compared to the neat TPS. The biocomposite at 15 wt% treated RH showed high water absorption. TPS with all treated RH contents showed high biodegradation rate, while the thermal stability of the TPS/treated RH biocomposites was slightly decreased. These novel composites showed promising properties for applications as absorbents.
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Affiliation(s)
- Phetdaphat Boonsuk
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Apinya Sukolrat
- Office of Scientific Instrument and Testing, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Sain Bourkaew
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Kaewta Kaewtatip
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Sirinya Chantarak
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Antonios Kelarakis
- UCLan Research Centre for Smart Materials, School of Natural Sciences, University of Central Lancashire, Preston PR1 2HE, UK
| | - Chiraphon Chaibundit
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
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Panrong T, Karbowiak T, Harnkarnsujarit N. Effects of acetylated and octenyl-succinated starch on properties and release of green tea compounded starch/LLDPE blend films. J FOOD ENG 2020. [DOI: 10.1016/j.jfoodeng.2020.110057] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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70
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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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71
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Zarski A, Bajer K, Raszkowska-Kaczor A, Rogacz D, Zarska S, Kapusniak J. From high oleic vegetable oils to hydrophobic starch derivatives: II. Physicochemical, processing and environmental properties. Carbohydr Polym 2020; 243:116499. [PMID: 32532383 DOI: 10.1016/j.carbpol.2020.116499] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 05/20/2020] [Accepted: 05/20/2020] [Indexed: 10/24/2022]
Abstract
Medium-substituted esters of starch and higher fatty acids, structurally identified in the first part of paper were subjected to further analyses, mainly to check application potential. In order to determine the possibility of using the esters in the packaging industry, the glycerol-plasticized starch esters were extruded on a single screw extruder in the form of a film. The mechanical properties tests consisted of tensile and tear strength. Hydrophobicity, water absorption and oil absorption were checked as the processing and functional properties. Environmental tests, such as phytotoxicity on monocotyledonous and dicotyledonous plants and biodegradability in soil under strictly controlled conditions of the vegetation hall were carried out. Esterification increased the hydrophobicity of the starch and the tensile and tear strength, without losing important environmental features such as biodegradability and non-toxicity. The obtained polymer materials give hope for their use in the production of new ecofriendly and biodegradable packaging.
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Affiliation(s)
- Arkadiusz Zarski
- Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, 42-200, Czestochowa, Poland
| | - Krzysztof Bajer
- Łukasiewicz Research Network - Institute for Engineering of Polymer Materials and Dyes, 87-100, Torun, Poland
| | - Aneta Raszkowska-Kaczor
- Łukasiewicz Research Network - Institute for Engineering of Polymer Materials and Dyes, 87-100, Torun, Poland
| | - Diana Rogacz
- Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, 42-200, Czestochowa, Poland
| | - Sandra Zarska
- Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, 42-200, Czestochowa, Poland
| | - Janusz Kapusniak
- Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, 42-200, Czestochowa, Poland.
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72
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An Innovative Method for the Recycling of Waste Carbohydrate-Based Flours. Polymers (Basel) 2020; 12:polym12061414. [PMID: 32599918 PMCID: PMC7362212 DOI: 10.3390/polym12061414] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 06/16/2020] [Accepted: 06/22/2020] [Indexed: 01/27/2023] Open
Abstract
This work represents an innovative study that, for the first time, explores the possibility to use waste flours to produce thermoplastic polymeric bio-films. To the best of our knowledge, this is the first time that waste flours, derived from bakeries, pizzerias or pasta factories, have been proposed for the production of bio-polymers, as a replacement of neat starch. To this aim, durum waste flour derived from a pasta factory, soft waste flour derived from pizzerias and neat maize starch used as control material were firstly analyzed from dimensional, morphological and chemical points of view. Afterwards, waste flour films were produced by the addition of a nature-based plasticizer, glycerol. Mechanical characterization of the plasticized thermoplastic films, produced by compression molding, evidenced low performances, even in the case of the neat maize starch. In order to improve the mechanical properties, the possibility to include polylactic acid and cardanol-based plasticizer was also investigated. Mass transport properties of all the produced bio-films were investigated by measuring their water vapor permeability and hygroscopic absorption. The durability properties of the bio-films were assessed by accelerated ageing tests, while the bio-degradability of the waste-based films was evaluated by measuring the solubility and the degradation in water. The physicochemical analyses of the novel bio-films evidenced good mechanical properties; specifically, the waste-based films showed a lower hygroscopic absorption and water solubility than those of the blends containing neat starch.
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73
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Altayan MM, Al Darouich T, Karabet F. Thermoplastic starch from corn and wheat: a comparative study based on amylose content. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03262-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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74
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Mysiukiewicz O, Barczewski M, Skórczewska K, Matykiewicz D. Correlation between Processing Parameters and Degradation of Different Polylactide Grades during Twin-Screw Extrusion. Polymers (Basel) 2020; 12:polym12061333. [PMID: 32545388 PMCID: PMC7362239 DOI: 10.3390/polym12061333] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/05/2020] [Accepted: 06/08/2020] [Indexed: 11/16/2022] Open
Abstract
This article presents the effect of twin-screw extrusion processing parameters, including temperature and rotational speed of screws, on the structure and properties of four grades of polylactide (PLA). To evaluate the critical processing parameters for PLA and the possibilities for oxidative and thermomechanical degradation, Fourier-transform infrared spectroscopy (FT-IR), oscillatory rheological analysis, and differential scanning calorimetry (DSC) measurements were used. The influence of degradation induced by processing temperature and high shearing conditions on the quality of the biodegradable polyesters with different melt flow indexes (MFIs)was investigated by color analysis within the CIELab scale. The presented results indicate that considering the high-temperature processing of PLA, the high mass flow index and low viscosity of the polymer reduce its time of residence in the plastifying unit and therefore limit discoloration and reduction of molecular weight due to the degradation process during melt mixing, whereas the initial molecular weight of the polymer is not an essential factor.
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Affiliation(s)
- Olga Mysiukiewicz
- Institute of Materials Technology, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland;
- Correspondence: (O.M.); (M.B.); Tel.: +48-61-647-5858 (M.B.)
| | - Mateusz Barczewski
- Institute of Materials Technology, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland;
- Correspondence: (O.M.); (M.B.); Tel.: +48-61-647-5858 (M.B.)
| | - Katarzyna Skórczewska
- Faculty of Chemical Technology and Engineering, UTP University of Science and Technology, Seminaryjna 3, 85-326 Bydgoszcz, Poland;
| | - Danuta Matykiewicz
- Institute of Materials Technology, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland;
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75
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Prapruddivongs C, Wongpreedee T. Use of eggshell powder as a potential hydrolytic retardant for citric acid-filled thermoplastic starch. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2020.05.076] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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76
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Sikora J, Majewski Ł, Puszka A. Modern Biodegradable Plastics-Processing and Properties: Part I. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E1986. [PMID: 32344558 PMCID: PMC7215468 DOI: 10.3390/ma13081986] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 04/21/2020] [Accepted: 04/22/2020] [Indexed: 11/16/2022]
Abstract
This paper presents a characterization of a plastic extrusion process and the selected properties of three biodegradable plastic types, in comparison with LDPE (low-density polyethylene). The four plastics include: LDPE, commercial name Malen E FABS 23-D022; potato starch based plastic (TPS-P), BIOPLAST GF 106/02; corn starch based plastic (TPS-C), BioComp®BF 01HP; and a polylactic acid (polylactide) plastic (PLA), BioComp®BF 7210. Plastic films with determined geometric parameters (thickness of the foil layer and width of the flattened foil sleeve) were produced from these materials (at individually defined processing temperatures), using blown film extrusion, by applying different extrusion screw speeds. The produced plastic films were tested to determine the geometrical features, MFR (melt flow rate), blow-up ratio, draw down ratio, mass flow rate, and exit velocity. The tests were complemented by thermogravimetry, differential scanning calorimetry, and chemical structure analysis. It was found that the biodegradable films were extruded at higher rate and mass flow rate than LDPE; the lowest thermal stability was ascertained for the film samples extruded from TPS-C and TPS-P, and that all tested biodegradable plastics contained polyethylene.
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Affiliation(s)
- Janusz Sikora
- Department of Technology and Polymer Processing, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland;
| | - Łukasz Majewski
- Department of Technology and Polymer Processing, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland;
| | - Andrzej Puszka
- Department of Polymer Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University in Lublin, ul. Gliniana 33, 20-614 Lublin, Poland;
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77
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Zhao X, Cornish K, Vodovotz Y. Narrowing the Gap for Bioplastic Use in Food Packaging: An Update. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:4712-4732. [PMID: 32202110 DOI: 10.1021/acs.est.9b03755] [Citation(s) in RCA: 122] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Plastic production has outgrown most other man-made materials, with more than 90% being petroleum-based and nonbiodegradable. Packaging, primarily food packaging, consumes the most plastic and is the largest contributor to municipal solid waste. In addition, its dependence on crude oil feedstock makes the plastic industry unsustainable and renders plastic markets vulnerable to oil price volatility. Therefore, the development of bioalternatives to conventional plastics is now a priority of the food packaging industry. Bioplastics are polymers that are either biobased (fully or partially), or biodegradable, or both. This review aims to provide an insightful overview of the most recent research and development successes in bioplastic materials, focusing on food packaging applications. Bioplastics are compared to their conventional counterparts with respect to their mechanical, thermal, barrier, and processability properties. The gaps between bio- and conventional plastics in food packaging are elucidated. Potential avenues for improving bioplastic properties to broaden their food packaging applications are critically examined. Furthermore, two of the most controversial topics on bioplastic alternatives, sustainability assessment and their impact on the plastic waste management system, are discussed.
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Affiliation(s)
- Xiaoying Zhao
- The Ohio State University, Department of Food Science and Technology, 2015 Fyffe Road, Columbus, Ohio 43210 United States
| | - Katrina Cornish
- The Ohio State University, Department of Horticulture and Crop Science, Department of Food, Agricultural and Biological Engineering, 1680 Madison Avenue, Wooster, Ohio 44691-4096 United States
| | - Yael Vodovotz
- The Ohio State University, Department of Food Science and Technology, 2015 Fyffe Road, Columbus, Ohio 43210 United States
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78
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Narancic T, Cerrone F, Beagan N, O’Connor KE. Recent Advances in Bioplastics: Application and Biodegradation. Polymers (Basel) 2020; 12:E920. [PMID: 32326661 PMCID: PMC7240402 DOI: 10.3390/polym12040920] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/07/2020] [Accepted: 04/13/2020] [Indexed: 12/12/2022] Open
Abstract
The success of oil-based plastics and the continued growth of production and utilisation can be attributed to their cost, durability, strength to weight ratio, and eight contributions to the ease of everyday life. However, their mainly single use, durability and recalcitrant nature have led to a substantial increase of plastics as a fraction of municipal solid waste. The need to substitute single use products that are not easy to collect has inspired a lot of research towards finding sustainable replacements for oil-based plastics. In addition, specific physicochemical, biological, and degradation properties of biodegradable polymers have made them attractive materials for biomedical applications. This review summarises the advances in drug delivery systems, specifically design of nanoparticles based on the biodegradable polymers. We also discuss the research performed in the area of biophotonics and challenges and opportunities brought by the design and application of biodegradable polymers in tissue engineering. We then discuss state-of-the-art research in the design and application of biodegradable polymers in packaging and emphasise the advances in smart packaging development. Finally, we provide an overview of the biodegradation of these polymers and composites in managed and unmanaged environments.
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Affiliation(s)
- Tanja Narancic
- UCD Earth Institute and School of Biomolecular and Biomedical Science, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland; (T.N.); (F.C.); (N.B.)
- BiOrbic - Bioeconomy Research Centre, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland
| | - Federico Cerrone
- UCD Earth Institute and School of Biomolecular and Biomedical Science, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland; (T.N.); (F.C.); (N.B.)
- BiOrbic - Bioeconomy Research Centre, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland
| | - Niall Beagan
- UCD Earth Institute and School of Biomolecular and Biomedical Science, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland; (T.N.); (F.C.); (N.B.)
| | - Kevin E. O’Connor
- UCD Earth Institute and School of Biomolecular and Biomedical Science, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland; (T.N.); (F.C.); (N.B.)
- BiOrbic - Bioeconomy Research Centre, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland
- School of Biomolecular and Biomedical Sciences, Earth Institute, O’Brien Centre for Science, University College Dublin, Belfield, 4, D04 N2E5 Dublin, Ireland
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79
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Phillips J, Venter JL, Atanasova M, Wesley-Smith J, Oosthuizen H, Emmambux MN, Du Toit EL, Focke WW. Dextrin Nanocomposites as Matrices for Solid Dosage Forms. ACS APPLIED MATERIALS & INTERFACES 2020; 12:16969-16977. [PMID: 32191427 DOI: 10.1021/acsami.0c02061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Safe application of water-insoluble acaricides requires fast release from solid dosage systems into aquatic environments. Dextrin is a water-soluble form of partially hydrolyzed starch, which may be used as matrix material for these systems if retrogradation can be inhibited by the inclusion of nanofillers. Several glycerol-plasticized thermoplastic dextrin-based nanocomposites were prepared with a twin-screw extrusion-compounding process. The nanofillers included a layered double hydroxide (LDH), cellulose nanofibers (CNF), and stearic acid. The time-dependent retrogradation of the compounds was monitored by X-ray diffraction (XRD) and dynamic mechanical thermal analysis (DMA). XRD showed that composite samples that included stearic acid in the formulation led to the formation of an amylose-lipid complex and a stable crystallinity during aging. The most promising nanocomposite included both stearic acid and CNF. It was selected as the carrier material for the water-insoluble acaricide Amitraz. Fast release rates were observed for composites containing 5, 10, and 20% (w/w) of the pesticide. A significant reduction in the particle size of the released Amitraz powder was observed, which is ascribed to the high-temperature compounding procedure.
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Affiliation(s)
- Justin Phillips
- Department of Chemical Engineering, University of Pretoria, Private Bag X20, Hatfield, Pretoria 0028, South Africa
| | - Jaco-Louis Venter
- Department of Chemical Engineering, University of Pretoria, Private Bag X20, Hatfield, Pretoria 0028, South Africa
| | - Maria Atanasova
- Department of Chemical Engineering, University of Pretoria, Private Bag X20, Hatfield, Pretoria 0028, South Africa
| | - James Wesley-Smith
- Sefako Makgatho Health Sciences University, Ga-Rankuwa 0208,South Africa
| | - Hester Oosthuizen
- Department of Chemical Engineering, University of Pretoria, Private Bag X20, Hatfield, Pretoria 0028, South Africa
| | - M Naushad Emmambux
- Department of Consumer and Food Sciences, University of Pretoria, Private Bag X20, Hatfield, Pretoria0028, South Africa
| | - Elizabeth L Du Toit
- Department of Chemical Engineering, University of Pretoria, Private Bag X20, Hatfield, Pretoria 0028, South Africa
| | - Walter W Focke
- Department of Chemical Engineering, University of Pretoria, Private Bag X20, Hatfield, Pretoria 0028, South Africa
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80
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Chhabra R, Peshattiwar V, Pant T, Deshpande A, Modi D, Sathaye S, Tibrewala A, Dyawanapelly S, Jain R, Dandekar P. In Vivo Studies of 3D Starch–Gelatin Scaffolds for Full-Thickness Wound Healing. ACS APPLIED BIO MATERIALS 2020; 3:2920-2929. [DOI: 10.1021/acsabm.9b01139] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Roha Chhabra
- Department of Pharmaceutical Sciences & Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400019, India
| | - Vaibhavi Peshattiwar
- Department of Pharmaceutical Sciences & Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400019, India
| | - Tejal Pant
- Department of Chemical Engineering, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400019, India
| | - Aparna Deshpande
- Department of Physics, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune 411008, India
| | - Deepak Modi
- Department of Molecular and Cellular Biology, National Institute For Research In Reproductive Health, Jehangir Merwanji Street, Parel, Mumbai 400012, India
| | - Sadhana Sathaye
- Department of Pharmaceutical Sciences & Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400019, India
| | - Anil Tibrewala
- Consultant Plastic and Cosmetic Surgeon, P.D. Hinduja National Hospital and Medical Research Centre, Veer Sawarkar Marg, Asavari, Shivaji Park, Mumbai 400016, India
| | - Sathish Dyawanapelly
- Department of Pharmaceutical Sciences & Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400019, India
| | - Ratnesh Jain
- Department of Chemical Engineering, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400019, India
| | - Prajakta Dandekar
- Department of Pharmaceutical Sciences & Technology, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400019, India
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81
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Machado CM, Benelli P, Tessaro IC. Study of interactions between cassava starch and peanut skin on biodegradable foams. Int J Biol Macromol 2020; 147:1343-1353. [PMID: 31669657 DOI: 10.1016/j.ijbiomac.2019.10.098] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 09/10/2019] [Accepted: 10/09/2019] [Indexed: 01/05/2023]
Abstract
The present work reports the effects of adding an agro-industrial residue (peanut skin) to cassava starch-based foams developed by thermopressing process. For this purpose, foams composed of cassava starch (CS foams) and cassava starch added of 24% (w/w) of peanut skin (CS/PS foams) were compared regarding their chemical structures, thermal, morphological and mechanical properties, moisture sorption isotherms, contact angle, and biodegradation. Results of dynamic mechanical analysis (DMA) showed the addition of peanut skin reduced the stiffness due to the increase of mobility of the starch chains. CS/PS foams exhibited a decrease in the storage modulus and glass transition temperatures as observed DMA. The addition of peanut skin did not influence on tensile stress and Young's modulus but reduced the tensile strain of the foams. The water contact angle of CS/PS foam was higher than CS foam, and as a result, CS/PS foams were found less hydrophilic than CS foams, which broaden the application of these materials. The reduction of hydrophilicity was related to the composition of the additive, mainly regarding lipids and proteins fractions, as well as to the interactions between cassava starch and peanut skin, reducing the availability of OH groups to bond with water.
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Affiliation(s)
- Caroline Martins Machado
- Universidade Federal do Rio Grande do Sul - UFRGS, Chemical Engineering Department, Ramiro Barcelos Street, 2777, ZIP Code: 90035-007, Porto Alegre, Rio Grande do Sul, Brazil.
| | - Patrícia Benelli
- Universidade Federal do Rio Grande do Sul - UFRGS, Chemical Engineering Department, Ramiro Barcelos Street, 2777, ZIP Code: 90035-007, Porto Alegre, Rio Grande do Sul, Brazil
| | - Isabel Cristina Tessaro
- Universidade Federal do Rio Grande do Sul - UFRGS, Chemical Engineering Department, Ramiro Barcelos Street, 2777, ZIP Code: 90035-007, Porto Alegre, Rio Grande do Sul, Brazil
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82
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Scognamiglio F, Gattia DM, Roselli G, Persia F, De Angelis U, Santulli C. Thermoplastic Starch (TPS) Films Added with Mucilage from Opuntia Ficus Indica: Mechanical, Microstructural and Thermal Characterization. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E1000. [PMID: 32102225 PMCID: PMC7078619 DOI: 10.3390/ma13041000] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 02/20/2020] [Accepted: 02/21/2020] [Indexed: 11/23/2022]
Abstract
Opuntia cladodes are a typical vegetable waste, from which mucilage in gel form can be extracted. This work proposes blending it with a self-produced thermoplastic starch (TPS), originating from potato starch with a high content in glycerol (ca. 30%). Three methods were compared for extraction, bare maceration (MA), mechanical blending (ME) and mechanical blending following maceration (MPM) to produce films with an approximate thickness of 150 μm. For the comparison, tensile testing, differential scanning calorimetry and scanning electron microscopy were used. The MPM process proved the most effective, not only for extraction yielding, but also to obtain a larger deformation of the samples with respect to the one allowed by the pure TPS films. A considerable plasticization effect was observed. Despite this, the mechanical performance is still not completely satisfactory, and the expected effect of the calcium and magnesium salts contained in the mucilage to improve the rigidity of the TPS film was not really revealed. Prospected improvements would concern the fabrication process and the investigation of other possible loading modes and sample geometries.
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Affiliation(s)
- Fabrizio Scognamiglio
- Technologies and Diagnostics for Conservation and Restoration Laboratory, School of Science and Technology, University of Camerino, Via Pacifici Mazzoni 2, 63100 Ascoli Piceno, Italy;
| | - Daniele Mirabile Gattia
- Department of Sustainability SSPT-ENEA—Casaccia Research Center, Via Anguillarese 301, 00123 Rome, Italy; (D.M.G.); (F.P.); (U.D.A.)
| | - Graziella Roselli
- School of Science and Technology, Chemistry Division, University of Camerino, Via S. Agostino 1, 62032 Camerino, Italy;
| | - Franca Persia
- Department of Sustainability SSPT-ENEA—Casaccia Research Center, Via Anguillarese 301, 00123 Rome, Italy; (D.M.G.); (F.P.); (U.D.A.)
| | - Ugo De Angelis
- Department of Sustainability SSPT-ENEA—Casaccia Research Center, Via Anguillarese 301, 00123 Rome, Italy; (D.M.G.); (F.P.); (U.D.A.)
| | - Carlo Santulli
- School of Science and Technology, Geology Division, University of Camerino, via Gentile III da Varano, 62032 Camerino, Italy
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83
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Zdanowicz M. Starch treatment with deep eutectic solvents, ionic liquids and glycerol. A comparative study. Carbohydr Polym 2020; 229:115574. [DOI: 10.1016/j.carbpol.2019.115574] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 10/31/2019] [Accepted: 11/05/2019] [Indexed: 01/10/2023]
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84
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Aldas M, Rayón E, López-Martínez J, Arrieta MP. A Deeper Microscopic Study of the Interaction between Gum Rosin Derivatives and a Mater-Bi Type Bioplastic. Polymers (Basel) 2020; 12:polym12010226. [PMID: 31963296 PMCID: PMC7023580 DOI: 10.3390/polym12010226] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Revised: 01/13/2020] [Accepted: 01/14/2020] [Indexed: 11/24/2022] Open
Abstract
The interaction between gum rosin and gum rosin derivatives with Mater-Bi type bioplastic, a biodegradable and compostable commercial bioplastic, were studied. Gum rosin and two pentaerythritol esters of gum rosin (Lurefor 125 resin and Unik Tack P100 resin) were assessed as sustainable compatibilizers for the components of Mater-Bi® NF 866 polymeric matrix. To study the influence of each additive in the polymeric matrix, each gum rosin-based additive was compounded in 15 wt % by melt-extrusion and further injection molding process. Then, the mechanical properties were assessed, and the tensile properties and impact resistance were determined. Microscopic analyses were carried out by field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM) and atomic force microscopy with nanomechanical assessment (AFM-QNM). The oxygen barrier and wettability properties were also assayed. The study revealed that the commercial thermoplastic starch is mainly composed of three phases: A polybutylene adipate-co-terephthalate (PBAT) phase, an amorphous phase of thermoplastic starch (TPSa), and a semi-crystalline phase of thermoplastic starch (TPSc). The poor miscibility among the components of the Mater-Bi type bioplastic was confirmed. Finally, the formulations with the gum rosin and its derivatives showed an improvement of the miscibility and the solubility of the components depending on the additive used.
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Affiliation(s)
- Miguel Aldas
- Departamento de Ciencia de Alimentos y Biotecnología, Facultad de Ingeniería Química y Agroindustria, Escuela Politécnica Nacional (EPN), Quito 170517, Ecuador
- Correspondence: (M.A.); (E.R.); (M.P.A.); Tel.: +593-999-736-444 (M.A.); +34-660-806-113 (E.R.); +34-913-944-231 (M.P.A.)
| | - Emilio Rayón
- Instituto de Tecnología de Materiales, Universitat Politècnica de València (UPV), 03801 Alcoy-Alicante, Spain;
- Correspondence: (M.A.); (E.R.); (M.P.A.); Tel.: +593-999-736-444 (M.A.); +34-660-806-113 (E.R.); +34-913-944-231 (M.P.A.)
| | - Juan López-Martínez
- Instituto de Tecnología de Materiales, Universitat Politècnica de València (UPV), 03801 Alcoy-Alicante, Spain;
| | - Marina P. Arrieta
- Facultad de Ciencias Químicas, Universidad Complutense de Madrid (UCM), Avenida Complutense s/n, Ciudad Universitaria, 28040 Madrid, Spain
- Correspondence: (M.A.); (E.R.); (M.P.A.); Tel.: +593-999-736-444 (M.A.); +34-660-806-113 (E.R.); +34-913-944-231 (M.P.A.)
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85
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Baran A, Vrábel P, Kovaľaková M, Hutníková M, Fričová O, Olčák D. Effects of sorbitol and formamide plasticizers on molecular motion in corn starch studied using NMR and DMTA. J Appl Polym Sci 2020. [DOI: 10.1002/app.48964] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- A. Baran
- Department of Physics, Faculty of Electrical Engineering and InformaticsTechnical University of Košice Park Komenského 2 042 00 Košice Slovakia
| | - P. Vrábel
- Department of Physics, Faculty of Electrical Engineering and InformaticsTechnical University of Košice Park Komenského 2 042 00 Košice Slovakia
| | - M. Kovaľaková
- Department of Physics, Faculty of Electrical Engineering and InformaticsTechnical University of Košice Park Komenského 2 042 00 Košice Slovakia
| | - M. Hutníková
- Department of Physics, Faculty of Electrical Engineering and InformaticsTechnical University of Košice Park Komenského 2 042 00 Košice Slovakia
| | - O. Fričová
- Department of Physics, Faculty of Electrical Engineering and InformaticsTechnical University of Košice Park Komenského 2 042 00 Košice Slovakia
| | - D. Olčák
- Department of Physics, Faculty of Electrical Engineering and InformaticsTechnical University of Košice Park Komenského 2 042 00 Košice Slovakia
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86
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Wang DW, Sun LS, Peng XL, Runt J, Kuo MC, Huang KS, Yeh JT. Tapioca/polyvinyl alcohol thermoplastic starch materials processed with the aid of supercritical CO2. Food Packag Shelf Life 2019. [DOI: 10.1016/j.fpsl.2019.100425] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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87
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Mi S, Sun L, Runt J, Kuo M, Huang K, Yeh J. Sodium Hexametaphosphate‐Modified Thermoplastic Starch Materials Prepared with the Assistance of Supercritical CO
2. STARCH-STARKE 2019. [DOI: 10.1002/star.201900055] [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)
- Si‐yu Mi
- Hubei Collaborative Innovation Center for Advanced Organic Chemical MaterialsMinistry of Education Key Laboratory for the Green Preparation and Application of Functional MaterialsHubei Key Laboratory of Polymer MaterialsFaculty of Materials Science and EngineeringHubei University Wuhan 430062 China
| | - Liang‐shuang Sun
- Hubei Collaborative Innovation Center for Advanced Organic Chemical MaterialsMinistry of Education Key Laboratory for the Green Preparation and Application of Functional MaterialsHubei Key Laboratory of Polymer MaterialsFaculty of Materials Science and EngineeringHubei University Wuhan 430062 China
| | - James Runt
- Department of Materials Science and EngineeringPenn State University University Park PA 19104 USA
| | - Mu‐chen Kuo
- Department of Materials EngineeringKun Shan University Tainan 71070 Taiwan
| | - Kuo‐shien Huang
- Department of Materials EngineeringKun Shan University Tainan 71070 Taiwan
| | - Jen‐taut Yeh
- Hubei Collaborative Innovation Center for Advanced Organic Chemical MaterialsMinistry of Education Key Laboratory for the Green Preparation and Application of Functional MaterialsHubei Key Laboratory of Polymer MaterialsFaculty of Materials Science and EngineeringHubei University Wuhan 430062 China
- Department of Materials Science and EngineeringPenn State University University Park PA 19104 USA
- Department of Materials EngineeringKun Shan University Tainan 71070 Taiwan
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88
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Nevoralová M, Koutný M, Ujčić A, Horák P, Kredatusová J, Šerá J, Růžek L, Růžková M, Krejčíková S, Šlouf M, Kruliš Z. Controlled biodegradability of functionalized thermoplastic starch based materials. Polym Degrad Stab 2019. [DOI: 10.1016/j.polymdegradstab.2019.108995] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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89
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Plasticizing and anti-plasticizing effects of polyvinyl alcohol in blend with thermoplastic starch. Int J Biol Macromol 2019; 140:775-781. [DOI: 10.1016/j.ijbiomac.2019.08.185] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 08/11/2019] [Accepted: 08/21/2019] [Indexed: 11/22/2022]
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90
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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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91
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Influence of Nano Titanium Dioxide and Clove Oil on Chitosan-Starch Film Characteristics. Polymers (Basel) 2019; 11:polym11091418. [PMID: 31470594 PMCID: PMC6780724 DOI: 10.3390/polym11091418] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 08/23/2019] [Accepted: 08/27/2019] [Indexed: 11/21/2022] Open
Abstract
The combined effects of nano titanium dioxide (TiO2-N) and clove oil (CO) on the physico-chemical, biological and structural properties of chitosan (CH)/starch (ST) films were investigated by using a solvent casting method. Results indicated that the incorporation of TiO2-N could improve the compactness of the film, increase the tensile strength (TS) and antioxidant activity, and decrease the water vapour permeability (WVP). As may be expected, the incorporation of CO into the film matrix decreased TS but increased the hydrophobicity as well as water vapour barrier antimicrobial and antioxidant properties. Fourier-transform infrared spectroscopy (FTIR) data supported intermolecular interactions between TiO2-N, CO and the film matrix. Use of a scanning electron microscope (SEM) showed that TiO2-N and CO were well dispersed and emulsified in the film network. Thermogravimetric (TG) and derivative thermogravimetric (DTG) curves demonstrated that TiO2-N and CO were well embedded in the film matrix, hence this blend film system could provide new formulation options for food packaging materials in the future.
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92
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Zdanowicz M, Staciwa P, Jędrzejewski R, Spychaj T. Sugar Alcohol-Based Deep Eutectic Solvents as Potato Starch Plasticizers. Polymers (Basel) 2019; 11:polym11091385. [PMID: 31450743 PMCID: PMC6780061 DOI: 10.3390/polym11091385] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 08/16/2019] [Accepted: 08/21/2019] [Indexed: 11/16/2022] Open
Abstract
The aim of this work was to prepare sugar alcohol-based deep eutectic solvents (DES) and test them as starch plasticizers. Thermoplastic starch (TPS) films were obtained via a simple and convenient thermocompression method. Influence of starch/DES premixtures conditioning (preheating, storage time) on TPS properties was investigated. TPS/sorbitol (S)-based DES exhibited similar tensile strength (TS) (8.6 MPa) but twice higher elongation at the break (ε) (33%) when compared with TPS plasticized only with S. Extra treatment, i.e., heating or prolonged storage time, facilitated starch/DES plasticizing. Starch with selected DES was also extruded and the influence of preconditioning and extrusion rotational speed were subsequently studied on thermocompressed films. Extrusion at 100 rpm led to films with TS up to ca. 10 MPa and ε up to 52%. Some differences in film samples morphology obtained via two processing methods were observed. X-ray diffractograms revealed that extruded samples exhibited a V-type peak at 18.2°, with intensity depending on plasticizer total molecular size. Applied techniques (mechanical tests, XRD, Dynamic Mechanical Analysis (DMA), FTIR-Attenuated Total Reflection (ATR), and moisture sorption) indicated that S-based DES forms stronger interactions with starch than glycerol (G) only used as conventional plasticizer, thus leading to better mechanical properties and inhibited tendency to starch recrystallization (studied up to one year).
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Affiliation(s)
- Magdalena Zdanowicz
- Polymer Institute, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology Szczecin, Ul. Pulaskiego 10, 70-322 Szczecin, Poland.
| | - Piotr Staciwa
- Polymer Institute, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology Szczecin, Ul. Pulaskiego 10, 70-322 Szczecin, Poland
| | - Roman Jędrzejewski
- Institute of Materials Engineering, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology Szczecin, Al. Piastow 10, 70-310 Szczecin, Poland
| | - Tadeusz Spychaj
- Polymer Institute, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology Szczecin, Ul. Pulaskiego 10, 70-322 Szczecin, Poland
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93
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Balakrishnan P, Geethamma V, Gopi S, Thomas MG, Kunaver M, Huskić M, Kalarikkal N, Volova T, Rouxel D, Thomas S. Thermal, biodegradation and theoretical perspectives on nanoscale confinement in starch/cellulose nanocomposite modified via green crosslinker. Int J Biol Macromol 2019; 134:781-790. [DOI: 10.1016/j.ijbiomac.2019.05.088] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 05/09/2019] [Accepted: 05/13/2019] [Indexed: 10/26/2022]
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94
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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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95
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Ivanič F, Kováčová M, Chodák I. The effect of plasticizer selection on properties of blends poly(butylene adipate-co-terephthalate) with thermoplastic starch. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.03.042] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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96
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Crystalline morphology of thermoplastic starch/talc nanocomposites induced by thermal processing. Heliyon 2019; 5:e01877. [PMID: 31211261 PMCID: PMC6562224 DOI: 10.1016/j.heliyon.2019.e01877] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 04/15/2019] [Accepted: 05/29/2019] [Indexed: 11/29/2022] Open
Abstract
A structural study about the changes induced by plasticization of native corn starch was carried out in this work. The influence of talc nanoparticles presence during starch thermal processing was also evaluated. Macroscopic observation of the granules appearance evolution during melt-mixing and thermo-compression was supported by a theoretical description related to these processing methods. Melt-mixing induced a polymorphic transformation from A- to Vh-type and a reduction in the degree of crystallinity. Homogenous appearance of the plasticized starch was in accordance to the disruption of granules integrity, evidenced by SEM. This observation agreed to the distinctive XRD pattern of plasticized starch from unprocessed granules. Talc incorporation did not require the adjustment of processing parameters in order to obtain a homogenous thermoplastic material, with an adequate particles distribution within the matrix. Regardless talc presence, plasticized starch presented a Vh-type crystalline structure. Thermo-compression led to particles alignment promoted by talc laminar morphology.
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97
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Cui JF, Li FY, Li JY, Li JF, Zhang CW, Chen S, Sun X. Effects of magnesium hydroxide on the properties of starch/plant fiber composites with foam structure. RSC Adv 2019; 9:17405-17413. [PMID: 35519863 PMCID: PMC9064602 DOI: 10.1039/c9ra01992h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 05/28/2019] [Indexed: 11/21/2022] Open
Abstract
In this study, magnesium hydroxide (MH) flame-retarded starch/plant fiber composites containing various MH contents (0%, 5%, 15%, 15%) were prepared and named as TF-MH0, TF-MH5, TF-MH10, TF-MH15. Thermal degradation, flame retardancy, mechanical and microscopic characteristics were discussed. The reduction in the maximum thermal degradation rate revealed that the addition of MH provided improvement in the thermal stability of the composite. The horizontal burning test and the limiting oxygen index analysis suggested enhancement in flame retardancy with increasing MH content. Moreover, the density of composites initially decreased and then increased as the MH content increased. The tensile strength was positively correlated with the density, whereas the cushioning performance was negatively correlated with the density. Microscopic analysis showed that there was an interfacial interaction between MH and thermoplastic starch, which not only improves the thermal stability, but also promotes bubble nucleation as a nucleating agent. The cells of TF-MH10 were uniform and dense, thus TF-MH10 had the best buffering performance. Furthermore, the cell structure of TF-MH15 was short in diameter, small in number, and large in skeleton thickness; therefore, TF-MH15 had the highest tensile strength.
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Affiliation(s)
- Jin-Feng Cui
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Ministry of Education), School of Mechanical Engineering, Shandong University Jinan 250061 China
- National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University Jinan 250061 China
| | - Fang-Yi Li
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Ministry of Education), School of Mechanical Engineering, Shandong University Jinan 250061 China
- National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University Jinan 250061 China
| | - Jian-Yong Li
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Ministry of Education), School of Mechanical Engineering, Shandong University Jinan 250061 China
- National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University Jinan 250061 China
| | - Jian-Feng Li
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Ministry of Education), School of Mechanical Engineering, Shandong University Jinan 250061 China
- National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University Jinan 250061 China
| | - Chuan-Wei Zhang
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Ministry of Education), School of Mechanical Engineering, Shandong University Jinan 250061 China
- National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University Jinan 250061 China
| | - Shuai Chen
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Ministry of Education), School of Mechanical Engineering, Shandong University Jinan 250061 China
- National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University Jinan 250061 China
| | - Xu Sun
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Ministry of Education), School of Mechanical Engineering, Shandong University Jinan 250061 China
- National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University Jinan 250061 China
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98
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Effects of Citric Acid on Structures and Properties of Thermoplastic Hydroxypropyl Amylomaize Starch Films. MATERIALS 2019; 12:ma12091565. [PMID: 31086040 PMCID: PMC6539472 DOI: 10.3390/ma12091565] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 05/02/2019] [Accepted: 05/09/2019] [Indexed: 12/03/2022]
Abstract
Hydroxypropyl amylomaize starch (HPAS) films were prepared by hot press. The effects of initial pH of HPAS on the mechanical properties, molecular interaction, structure, and cross-linking degree of the resultant films were investigated. A weak acidic condition was suitable for cross-linking of citric acid and HPAS by reactive extrusion. The film of HPAS with an initial pH of 5.66 had the maximum tensile strength of 7.20 MPa and elongation-at-break of 94.53%, and the weight average molecular weight of HPAS increased to 4.17 × 105 g/mol. An appropriate initial pH facilitated the formation of diester bonds between HPAS and citric acid during extrusion, but too low initial pH levels resulted in hydrolysis of starch molecules and reduced the mechanical properties.
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99
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Lai YH, Puspanadan S, Lee CK. Nutritional optimization of Arthrospira platensis for starch and Total carbohydrates production. Biotechnol Prog 2019; 35:e2798. [PMID: 30828976 DOI: 10.1002/btpr.2798] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 01/24/2019] [Accepted: 02/27/2019] [Indexed: 01/17/2023]
Abstract
Present study aims to optimize the production of starch and total carbohydrates from Arthrospira platensis. Growing concerns toward unprecedented environmental issues associated with plastic pollution has created a tremendous impetus to develop new biomaterials for the production of bioplastic. Starch-based biopolymers from algae serve as sustainable feedstock for thermoplastic starch production due to their abundant availability and low cost. A. platensis was cultivated in Zarrouk's medium at 32 ± 1°C and exposed to red light with a photoperiod of 12:12 hr light/dark. Growth kinetics studies showed that the maximum specific growth rate (μmax ) obtained was 0.059 day-1 with the doubling time (td ) of 11.748 days. Subsequently, Zarrouk's medium with different concentrations of sulfur, phosphorus and nitrogen was prepared to establish the nutrient-limiting conditions to enhance the accumulation of starch and total carbohydrates. In this study, the highest starch accumulated was 6.406 ± 0.622 mg L-1 under optimized phosphorus limitation (0.025 g L-1 ) conditions. Nitrogen limitation (0.250 g L-1 ) results demonstrated significant influenced (p < 0.05) on total carbohydrates (67.573 ± 2.893 mg L-1 ) accumulation in A. platensis. The starch accumulation in A. platensis was significantly affected (p < 0.05) by phosphorus limitation (0.0025 g L-1 ). Subsequently, the optimized phosphorus concentration was coupled with mixotrophic cultivation to further enhance the starch accumulation. The results obtained indicated that, the starch (11.426 ± 0.314 mg L-1 ) and carbohydrates (43.053 ± 2.986 mg L-1 ) concentration obtained was significantly high (p < 0.05) under mixotrophic cultivation. Therefore, it shown that nutrient limitation and mixotrophic cultivation are viable strategies to enhance the accumulation of starch and total carbohydrates in A. platensis.
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Affiliation(s)
- Yuen Hing Lai
- Bioprocess Technology Division, School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia
| | - Soopna Puspanadan
- Bioprocess Technology Division, School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia
| | - Chee Keong Lee
- Bioprocess Technology Division, School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia
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100
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Jaiswal L, Shankar S, Rhim JW. Applications of nanotechnology in food microbiology. METHODS IN MICROBIOLOGY 2019. [DOI: 10.1016/bs.mim.2019.03.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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