1
|
Oliveira JPD, Silva IBD, Costa JDSS, Oliveira JSD, Oliveira EL, Coutinho ML, Almeida MEFD, Landim LB, Silva NMCD, Oliveira CPD. Bibliometric study and potential applications in the development of starch films with nanocellulose: A perspective from 2019 to 2023. Int J Biol Macromol 2024:133828. [PMID: 39084985 DOI: 10.1016/j.ijbiomac.2024.133828] [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: 03/17/2024] [Revised: 07/01/2024] [Accepted: 07/10/2024] [Indexed: 08/02/2024]
Abstract
This study aimed to perform a bibliometric analysis of starch films with nanocellulose, using the Scopus database and VOSviewer and Bibliometrix software. A total of 258 documents were identified between 2019 and 2023, reflecting a growing interest in research, particularly in journals such as the International Journal of Biological Macromolecules, Polymers, and Carbohydrate Polymers. The most common terms were "starch" (349 occurrences), "cellulose" (207), and "tensile strength" (175). China (58 articles), Brazil (38), and India (33) led scientific production, with authors like Ilyas (13 articles) and Sapuan (10) at the forefront. Approximately 41.7 % of the studies used corn starch. The analysis revealed that 66 % of the studies investigated films with cellulose nanofibrils (CNF), 32 % with cellulose nanocrystals (CNC), and 2 % with bacterial nanocellulose (CB). The majority of studies (94.1 %) used the casting method for film production. Additionally, 35.44 % focused on reinforcing films with nanocellulose, while 7 % developed blends with other biopolymers. About 59.44 % examined the performance of starch films for food packaging, 11.25 % explored practical applications in various foods. Furthermore, 7.94 % incorporated active agents to improve antioxidant and antimicrobial properties, 1.30 % investigated active packaging. Moreover, 2.36 % explored the use of films in materials engineering, and 2.36 % explored biomedical potential. Only 0.40 % evaluated the impact of films on wastewater treatment. The analysis highlights the potential of starch films with nanocellulose, demonstrating their diverse applications and the growing interest in the field.
Collapse
Affiliation(s)
- Jocilane Pereira de Oliveira
- Graduate Program in Food Engineering and Science, State University of Bahia, Itapetinga, Bahia 45700-000, Brazil.
| | - Isaac Borges da Silva
- Department of Agribusiness Technology, Federal Institute of Bahia, Guanambi, Bahia 46430-000, Brazil
| | | | - Jéssica Santos de Oliveira
- Graduate Program in Food Engineering and Science, State University of Bahia, Itapetinga, Bahia 45700-000, Brazil
| | - Esaul Lucas Oliveira
- Graduate Program in Food Engineering and Science, State University of Bahia, Itapetinga, Bahia 45700-000, Brazil
| | - Mateus Lima Coutinho
- Department of Chemistry, Federal Institute of Bahia, Guanambi, Bahia 46430-000, Brazil
| | | | - Lucas Brito Landim
- Department of Agribusiness Technology, Federal Institute of Bahia, Guanambi, Bahia 46430-000, Brazil
| | | | | |
Collapse
|
2
|
Niu L, He X, Zhang X, Liang W, Lin Q, Li W. Insights into the enhanced mechanism of electron beam pretreatment on application performance for poly (butylene adipate-co-terephthalate)/acetylated cellulose composite plastics. Carbohydr Polym 2024; 330:121840. [PMID: 38368116 DOI: 10.1016/j.carbpol.2024.121840] [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: 10/31/2023] [Revised: 01/15/2024] [Accepted: 01/17/2024] [Indexed: 02/19/2024]
Abstract
In this work, we developed a strategy to construct poly (butylene adipate-co-terephthalate) (PBAT) composite plastics with excellent mechanical properties, superior thermal stability and enhanced biodegradability by combining acetylated celluloses (ECs) mediated by electron beam irradiation (EBI), which works as a toughening agent. With findings, the EBI pretreatment assisted with acetylation was applied to develop ECs materials with a higher degree of acetylation than acetylation alone. The pretreated ECs with increased hydrophobicity tended to decrease the chance of self-aggregation and enhanced the interfacial compatibility and adhesion with PBAT in PBAT/ECs composite plastics. Thus, PBAT/ECs composite plastics exhibited a smoother and more uniform surface structure during preparation and offered higher tensile strength, water vapor transmission rate, water absorption rate, thermal stability and degradation rate, and lower elongation at a break during application. On top of that, the PBAT/ECs composite plastics were characterized by a series of methods containing Fourier transform infrared spectroscopy and X-ray diffraction, indicating that these properties are mainly caused by the acetylation of hydroxyl groups from cellulose and carboxyl groups of PBAT. The work is expected to expand the application scope of PBAT and cellulose and provide an attainable solution for a biodegradable substitute for traditional plastics.
Collapse
Affiliation(s)
- Li Niu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, PR China
| | - Xinyi He
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, PR China
| | - Xiuyun Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, PR China
| | - Wei Liang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, PR China
| | - Qian Lin
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, PR China
| | - Wenhao Li
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, PR China.
| |
Collapse
|
3
|
Dordevic D, Dordevic S, Abdullah FAA, Mader T, Medimorec N, Tremlova B, Kushkevych I. Edible/Biodegradable Packaging with the Addition of Spent Coffee Grounds Oil. Foods 2023; 12:2626. [PMID: 37444364 DOI: 10.3390/foods12132626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 07/03/2023] [Accepted: 07/05/2023] [Indexed: 07/15/2023] Open
Abstract
BACKGROUND Following petroleum, coffee ranks as the second most extensively exchanged commodity worldwide. The definition of spent coffee ground (SCG) can be outlined as the waste generated after consuming coffee. The aims of the study are to produce edible/biodegradable packaging with the addition of spent coffee grounds (SCG) oil and to investigate how this fortification can affect chemical, textural, and solubility properties of experimentally produced films. METHODS The produced films were based on κ-carrageenan and pouring-drying techniques in petri dishes. Two types of emulsifiers were used: Tween 20 and Tween 80. The films were analyzed by antioxidant and textural analysis, and their solubility was also tested. RESULTS Edible/biodegradable packaging samples produced with the addition of SCG oil showed higher (p < 0.05) antioxidant capacity in comparison with control samples produced without the addition of SCG oil. The results of the research showed that the fortification of edible/biodegradable packaging with the addition of SCG oil changed significantly (p < 0.05) both chemical and physical properties of the films. CONCLUSIONS Based on the findings obtained, it was indicated that films manufactured utilizing SCG oil possess considerable potential to serve as an effective and promising material for active food packaging purposes.
Collapse
Affiliation(s)
- Dani Dordevic
- Department of Plant Origin Food Sciences, Faculty of Veterinary Hygiene and Ecology, University of Veterinary Sciences Brno, Palackého tř. 1946/1, 612 42 Brno, Czech Republic
| | - Simona Dordevic
- Department of Plant Origin Food Sciences, Faculty of Veterinary Hygiene and Ecology, University of Veterinary Sciences Brno, Palackého tř. 1946/1, 612 42 Brno, Czech Republic
| | - Fouad Ali Abdullah Abdullah
- Department of Meat Hygiene and Technology, Faculty of Veterinary Hygiene and Ecology, University of Veterinary Sciences, 612 42 Brno, Czech Republic
- Department of Medical Laboratory Technology, College of Health and Medical Techniques, Duhok Polytechnic University, Duhok 42001, Iraq
| | - Tamara Mader
- University North, Dr. Zarka Dolinar Square 1, 48000 Koprivnica, Croatia
| | - Nino Medimorec
- University North, Dr. Zarka Dolinar Square 1, 48000 Koprivnica, Croatia
| | - Bohuslava Tremlova
- Department of Plant Origin Food Sciences, Faculty of Veterinary Hygiene and Ecology, University of Veterinary Sciences Brno, Palackého tř. 1946/1, 612 42 Brno, Czech Republic
| | - Ivan Kushkevych
- Department of Experimental Biology, Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic
| |
Collapse
|
4
|
Hernández-Varela JD, Medina DI. Revalorization of Coffee Residues: Advances in the Development of Eco-Friendly Biobased Potential Food Packaging. Polymers (Basel) 2023; 15:2823. [PMID: 37447469 DOI: 10.3390/polym15132823] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 06/21/2023] [Accepted: 06/22/2023] [Indexed: 07/15/2023] Open
Abstract
One of the main limitations in the creation of bioplastics is their large-scale development, referred to as the industrial-scale processing of plastics. For this reason, bioplastic engineering emerges as one of the main objectives of researchers, who are attempting to create not only more environmentally friendly but also sustainable, low-cost, and less polluting materials. This review presents the advances in the development of biodegradable and compostable films/containers using eco-friendly components of by-products of the coffee industry, such as coffee flour (CF), coffee mucilage (CM), coffee husks (CH), coffee silverskin (CS), and spent coffee grounds (SCGs), and a brief review of the common industrial processing techniques for the production of food packaging, including extrusion, compression molding, injection molding, and laboratory-scale techniques such as solvent casting. Finally, this review presents various advances in the area that can be scalable or applicable to different products using by-products generated from the coffee industry, taking into account the limitations and drawbacks of using a biomaterial.
Collapse
Affiliation(s)
- Josué D Hernández-Varela
- Institute of Advanced Materials for Sustainable Manufacturing, Tecnológico de Monterrey, Monterrey 64849, Nuevo Leon, Mexico
| | - Dora I Medina
- Institute of Advanced Materials for Sustainable Manufacturing, Tecnológico de Monterrey, Monterrey 64849, Nuevo Leon, Mexico
| |
Collapse
|
5
|
Sultana A, Kumar L, Gaikwad KK. Lignocellulose nanofibrils/guar gum-based ethylene scavenging composite film integrated with zeolitic imidazolate framework-8 for food packaging. Int J Biol Macromol 2023:125031. [PMID: 37244327 DOI: 10.1016/j.ijbiomac.2023.125031] [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: 04/19/2023] [Revised: 05/11/2023] [Accepted: 05/20/2023] [Indexed: 05/29/2023]
Abstract
Ethylene, a ripening hormone, is critical in limiting the shelf life of fresh produce, specifically climacteric fruits and vegetables. A simple and benign fabrication approach is used to transform sugarcane bagasse, an agro-industrial waste into lignocellulosic nanofibrils (LCNF). In this investigation, biodegradable film was fabricated using LCNF (extracted from sugarcane bagasse) and guar gum (GG) which was reinforced with zeolitic imidazolate framework (ZIF)-8/zeolite. The LCNF/GG film not only acts as a biodegradable matrix to hold the ZIF-8/zeolite composite, but also possesses ethylene scavenging, antioxidant, and UV-blocking properties. The characterization results suggested that pure LCNF showed antioxidant activity of around 69.55 %. The LCNF/GG/MOF-4 film has shown lowest UV-transmittance (5.06 %) and highest ethylene scavenging capacity (40.2 %) among all the samples. After 6 days of storage at 25 ± 2 °C, packaged control bananas samples underwent significant degradation. In contrast, a banana package consisting of LCNF/GG/MOF-4 film maintained their high quality in terms of colour. Fabricated novel biodegradable film has potential application prospects for being used in prolonging the shelf life of fresh produce.
Collapse
Affiliation(s)
- Afreen Sultana
- Department of Paper Technology, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Lokesh Kumar
- Department of Paper Technology, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Kirtiraj K Gaikwad
- Department of Paper Technology, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| |
Collapse
|
6
|
Debnath B, Duarah P, Haldar D, Purkait MK. Improving the properties of corn starch films for application as packaging material via reinforcement with microcrystalline cellulose synthesized from elephant grass. Food Packag Shelf Life 2022. [DOI: 10.1016/j.fpsl.2022.100937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
7
|
Marano S, Laudadio E, Minnelli C, Stipa P. Tailoring the Barrier Properties of PLA: A State-of-the-Art Review for Food Packaging Applications. Polymers (Basel) 2022; 14:1626. [PMID: 35458376 PMCID: PMC9029979 DOI: 10.3390/polym14081626] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 04/07/2022] [Accepted: 04/08/2022] [Indexed: 02/01/2023] Open
Abstract
It is now well recognized that the production of petroleum-based packaging materials has created serious ecological problems for the environment due to their resistance to biodegradation. In this context, substantial research efforts have been made to promote the use of biodegradable films as sustainable alternatives to conventionally used packaging materials. Among several biopolymers, poly(lactide) (PLA) has found early application in the food industry thanks to its promising properties and is currently one of the most industrially produced bioplastics. However, more efforts are needed to enhance its performance and expand its applicability in this field, as packaging materials need to meet precise functional requirements such as suitable thermal, mechanical, and gas barrier properties. In particular, improving the mass transfer properties of materials to water vapor, oxygen, and/or carbon dioxide plays a very important role in maintaining food quality and safety, as the rate of typical food degradation reactions (i.e., oxidation, microbial development, and physical reactions) can be greatly reduced. Since most reviews dealing with the properties of PLA have mainly focused on strategies to improve its thermal and mechanical properties, this work aims to review relevant strategies to tailor the barrier properties of PLA-based materials, with the ultimate goal of providing a general guide for the design of PLA-based packaging materials with the desired mass transfer properties.
Collapse
Affiliation(s)
- Stefania Marano
- Department of Science and Engineering of Matter, Environment and Urban Planning, Marche Polytechnic University, 60131 Ancona, Italy; (E.L.); (P.S.)
| | - Emiliano Laudadio
- Department of Science and Engineering of Matter, Environment and Urban Planning, Marche Polytechnic University, 60131 Ancona, Italy; (E.L.); (P.S.)
| | - Cristina Minnelli
- Department of Life and Environmental Sciences, Marche Polytechnic University, 60131 Ancona, Italy;
| | - Pierluigi Stipa
- Department of Science and Engineering of Matter, Environment and Urban Planning, Marche Polytechnic University, 60131 Ancona, Italy; (E.L.); (P.S.)
| |
Collapse
|
8
|
Valorization of starch nanoparticles on microstructural and physical properties of
PLA
‐starch nanocomposites. J Appl Polym Sci 2022. [DOI: 10.1002/app.51757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
9
|
Gonçalves BMM, Camillo MDO, Oliveira MP, Carreira LG, Moulin JC, Fantuzzi Neto H, de Oliveira BF, Pereira AC, Monteiro SN. Surface Treatments of Coffee Husk Fiber Waste for Effective Incorporation into Polymer Biocomposites. Polymers (Basel) 2021; 13:polym13193428. [PMID: 34641246 PMCID: PMC8512342 DOI: 10.3390/polym13193428] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 09/21/2021] [Accepted: 09/28/2021] [Indexed: 11/16/2022] Open
Abstract
Natural lignocellulose fibers have been extensively investigated and applied as a reinforcement of polymer composites in industrial applications from food packing to automotive parts. Among the advantages of natural fibers stands their relatively low cost and sustainable characteristics. These are accentuated in the case of residual fibers such as those obtained from coffee husks, an agribusiness waste, usually burnt or disposed into the environment. As composite reinforcement, hydrophilic natural fibers display adhesion problems to the most hydrophobic polymer matrices. This adhesion might be improved with distinct types of fibers surface treatments. In the present work, the effectiveness of three surface treatments applied to coffee husk fiber wastes (CHFW) were investigated, aiming to improve the tensile performance of castor oil-based polyurethane (COPU) biocomposites. The effects of treatments associated with (i) chemical with sodium hydroxide, (ii) physical by temperature and pressure and hydrothermic treatment, and (iii) biological by fermentation with Phanerochaete Chrysosporium fungus were evaluated by means of Fourier transformed infrared spectroscopy, X-ray diffraction, thermal analyses and morphology by scanning electron microscopy for different concentration of NaOH, different hydrothermic times at 121 °C/98 kPa and exposition to P. chrysosporium. The most effective treatment was the hydrothermal one at 121 °C and 98.06 kPa for 30 min. Preliminary tensile tests were performed in COPU biocomposites reinforced with 20% CHFWs subjected to the optimized conditions for each distinct type of treatment. The results indicated that the hydrothermal treatment promoted significant enhancement in the fiber/matrix interfacial bond, increasing the tensile strength up to 60% compared to COPU reinforced with in natura CHFWs fibers. It is important to mention that these composites can be applied as plastic wood for household items’ internal parts and in the automobile industry.
Collapse
Affiliation(s)
- Bárbara Maria Mateus Gonçalves
- Forest and Wood Sciences Department, Federal University of Espírito Santo, Jeronimo Monteiro, Vitória 29550-000, Brazil; (B.M.M.G.); (M.d.O.C.); (M.P.O.); (J.C.M.); (H.F.N.)
| | - Mayara de Oliveira Camillo
- Forest and Wood Sciences Department, Federal University of Espírito Santo, Jeronimo Monteiro, Vitória 29550-000, Brazil; (B.M.M.G.); (M.d.O.C.); (M.P.O.); (J.C.M.); (H.F.N.)
| | - Michel Picanço Oliveira
- Forest and Wood Sciences Department, Federal University of Espírito Santo, Jeronimo Monteiro, Vitória 29550-000, Brazil; (B.M.M.G.); (M.d.O.C.); (M.P.O.); (J.C.M.); (H.F.N.)
| | - Lilian Gasparelli Carreira
- Rural Engineering Department, Federal University of Espírito Santo, Alto Universitário, sn., Alegre 29500-000, Brazil;
| | - Jordão Cabral Moulin
- Forest and Wood Sciences Department, Federal University of Espírito Santo, Jeronimo Monteiro, Vitória 29550-000, Brazil; (B.M.M.G.); (M.d.O.C.); (M.P.O.); (J.C.M.); (H.F.N.)
| | - Humberto Fantuzzi Neto
- Forest and Wood Sciences Department, Federal University of Espírito Santo, Jeronimo Monteiro, Vitória 29550-000, Brazil; (B.M.M.G.); (M.d.O.C.); (M.P.O.); (J.C.M.); (H.F.N.)
| | - Bárbara Ferreira de Oliveira
- Advanced Materials Department, Darcy Ribeiro Northern Fluminense State University, Campos dos Goytacazes 28013-602, Brazil;
| | - Artur Camposo Pereira
- Military Institute of Engineering—IME, Materials Science Program, Praça General Tibúrcio 80, Urca, Rio de Janeiro 22290-270, Brazil;
| | - Sergio Neves Monteiro
- Military Institute of Engineering—IME, Materials Science Program, Praça General Tibúrcio 80, Urca, Rio de Janeiro 22290-270, Brazil;
- Correspondence: or
| |
Collapse
|
10
|
Gürler N, Paşa S, Temel H. Silane doped biodegradable starch-PLA bilayer films for food packaging applications: Mechanical, thermal, barrier and biodegradability properties. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.05.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
11
|
Torres Castillo NE, Ochoa Sierra JS, Oyervides-Muñoz MA, Sosa-Hernández JE, Iqbal HM, Parra-Saldívar R, Melchor-Martínez EM. Exploring the potential of coffee husk as caffeine bio-adsorbent – A mini-review. CASE STUDIES IN CHEMICAL AND ENVIRONMENTAL ENGINEERING 2021. [DOI: 10.1016/j.cscee.2020.100070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
|
12
|
Oliveira G, Passos CP, Ferreira P, Coimbra MA, Gonçalves I. Coffee By-Products and Their Suitability for Developing Active Food Packaging Materials. Foods 2021; 10:foods10030683. [PMID: 33806924 PMCID: PMC8005104 DOI: 10.3390/foods10030683] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 03/18/2021] [Accepted: 03/19/2021] [Indexed: 01/30/2023] Open
Abstract
The coffee industry generates a wide variety of by-products derived from green coffee processing (pulp, mucilage, parchment, and husk) and roasting (silverskin and spent coffee grounds). All these fractions are simply discarded, despite their high potential value. Given their polysaccharide-rich composition, along with a significant number of other active biomolecules, coffee by-products are being considered for use in the production of plastics, in line with the notion of the circular economy. This review highlights the chemical composition of coffee by-products and their fractionation, evaluating their potential for use either as polymeric matrices or additives for developing plastic materials. Coffee by-product-derived molecules can confer antioxidant and antimicrobial activities upon plastic materials, as well as surface hydrophobicity, gas impermeability, and increased mechanical resistance, suitable for the development of active food packaging. Overall, this review aims to identify sustainable and eco-friendly strategies for valorizing coffee by-products while offering suitable raw materials for biodegradable plastic formulations, emphasizing their application in the food packaging sector.
Collapse
Affiliation(s)
- Gonçalo Oliveira
- CICECO–Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; (G.O.); (P.F.)
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (C.P.P.); (M.A.C.)
| | - Cláudia P. Passos
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (C.P.P.); (M.A.C.)
| | - Paula Ferreira
- CICECO–Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; (G.O.); (P.F.)
| | - Manuel A. Coimbra
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (C.P.P.); (M.A.C.)
| | - Idalina Gonçalves
- CICECO–Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; (G.O.); (P.F.)
- Correspondence:
| |
Collapse
|
13
|
Hejna A. Potential applications of by-products from the coffee industry in polymer technology - Current state and perspectives. WASTE MANAGEMENT (NEW YORK, N.Y.) 2021; 121:296-330. [PMID: 33406477 DOI: 10.1016/j.wasman.2020.12.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 12/09/2020] [Accepted: 12/12/2020] [Indexed: 06/12/2023]
Abstract
Coffee is one of the most popular beverages in the world, and its popularity is continuously growing, which can be expressed by almost doubling production over the last three decades. Cultivation, processing, roasting, and brewing coffee are known for many years. These processes generate significant amounts of by-products since coffee bean stands for around 50% of the coffee cherry. Therefore, considering the current pro-ecological trends, it is essential to develop the utilization methods for the other 50% of the coffee cherry. Among the possibilities, much attention is drawn to polymer chemistry and technology. This industry branch may efficiently consume different types of lignocellulosic materials to use them as fillers for polymer composites or as intermediate sources of particular chemical compounds. Moreover, due to their chemical composition, coffee industry by-products may be used as additives modifying the oxidation resistance, antimicrobial, or antifungal properties of polymeric materials. These issues should be considered especially important in the case of biodegradable polymers, whose popularity is growing over the last years. This paper summarizes the literature reports related to the generation and composition of the coffee industry by-products, as well as the attempts of their incorporation into polymer technology. Moreover, potential directions of research based on the possibilities offered by the coffee industry by-products are presented.
Collapse
Affiliation(s)
- Aleksander Hejna
- Department of Polymer Technology, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland.
| |
Collapse
|
14
|
Preparation and Characterization of Biodegradable Composited Films Based on Potato Starch/Glycerol/Gelatin. J FOOD QUALITY 2021. [DOI: 10.1155/2021/6633711] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The use of plastics is resisted worldwide. Therefore, finding alternatives to plastic packaging products is an urgent issue. This work was dedicated to the preparation of biodegradable composited films with potato starch, glycerol, and gelatin. The formulation of the biodegradable film was first optimized via response surface methodology combined with the multi-index comprehensive evaluation method that considered physical properties (thickness, water solution (WS), tensile strength (TS) and elongation at break (E%)) and barrier property (light transmittance (T%)). Results indicated that the optimal conditions were 2.5% starch, 2.0% glycerol, and 1.5% gelatin (based on water). The optimized film presented excellent properties with TS of 4.47 MPa, E% of 109.91%, WS of 43.64%, and T% of 41.21% at 500 nm, and the comprehensive evaluation score of the composite film was 28.68. Moreover, a model verification experiment was further conducted, which proved that the predicted value highly matched experimental values, indicting the credibility and accuracy of the model. The resulting films were further characterized on the basis of rheological measurements, Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The rheological measurements proved that the film-forming solution exhibited low shear viscosity and non-Newtonian fluid behavior. FTIR and SEM revealed excellent compatibility among starch, glycerol, and gelatin. Hence, the resulting optimized film may be expected to provide theoretical basis and technical support for the food packing industry.
Collapse
|