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Rajeshkumar L, Kumar PS, Ramesh M, Sanjay MR, Siengchin S. Assessment of biodegradation of lignocellulosic fiber-based composites - A systematic review. Int J Biol Macromol 2023; 253:127237. [PMID: 37804890 DOI: 10.1016/j.ijbiomac.2023.127237] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/29/2023] [Accepted: 10/01/2023] [Indexed: 10/09/2023]
Abstract
Lignocellulosic fiber-reinforced polymer composites are the most extensively used modern-day materials with low density and better specific strength specifically developed to render better physical, mechanical, and thermal properties. Synthetic fiber-reinforced composites face some serious issues like low biodegradability, non-environmentally friendly, and low disposability. Lignocellulosic or natural fiber-reinforced composites, which are developed from various plant-based fibers and animal-based fibers are considered potential substitutes for synthetic fiber composites because they are characterized by lightweight, better biodegradability, and are available at low cost. It is very much essential to study end-of-life (EoL) conditions like biodegradability for the biocomposites which occur commonly after their service life. During biodegradation, the physicochemical arrangement of the natural fibers, the environmental conditions, and the microbial populations, to which the natural fiber composites are exposed, play the most influential factors. The current review focuses on a comprehensive discussion of the standards and assessment methods of biodegradation in aerobic and anaerobic conditions on a laboratory scale. This review is expected to serve the materialists and technologists who work on the EoL behaviour of various materials, particularly in natural fiber-reinforced polymer composites to apply these standards and test methods to various classes of biocomposites for developing sustainable materials.
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Affiliation(s)
- L Rajeshkumar
- Centre for Machining and Materials Testing, KPR Institute of Engineering and Technology, Coimbatore, Tamil Nadu, India
| | - P Sathish Kumar
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, Thailand
| | - M Ramesh
- Department of Mechanical Engineering, KIT-Kalaignarkarunanidhi Institute of Technology, Coimbatore, Tamil Nadu, India
| | - M R Sanjay
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, Thailand.
| | - Suchart Siengchin
- Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok (KMUTNB), Bangkok, Thailand
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2
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Barreira-Pinto R, Carneiro R, Miranda M, Guedes RM. Polymer-Matrix Composites: Characterising the Impact of Environmental Factors on Their Lifetime. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16113913. [PMID: 37297046 DOI: 10.3390/ma16113913] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/02/2023] [Accepted: 05/15/2023] [Indexed: 06/12/2023]
Abstract
Polymer-matrix composites are widely used in engineering applications. Yet, environmental factors impact their macroscale fatigue and creep performances significantly, owing to several mechanisms acting at the microstructure level. Herein, we analyse the effects of water uptake that are responsible for swelling and, over time and in enough quantity, for hydrolysis. Seawater, due to a combination of high salinity and pressures, low temperature and biotic media present, also contributes to the acceleration of fatigue and creep damage. Similarly, other liquid corrosive agents penetrate into cracks induced by cyclic loading and cause dissolution of the resin and breakage of interfacial bonds. UV radiation either increases the crosslinking density or scissions chains, embrittling the surface layer of a given matrix. Temperature cycles close to the glass transition damage the fibre-matrix interface, promoting microcracking and hindering fatigue and creep performance. The microbial and enzymatic degradation of biopolymers is also studied, with the former responsible for metabolising specific matrices and changing their microstructure and/or chemical composition. The impact of these environmental factors is detailed for epoxy, vinyl ester and polyester (thermoset); polypropylene, polyamide and poly etheretherketone (thermoplastic); and for poly lactic acid, thermoplastic starch and polyhydroxyalkanoates (biopolymers). Overall, the environmental factors mentioned hamper the fatigue and creep performances, altering the mechanical properties of the composite or causing stress concentrations through microcracks, promoting earlier failure. Future studies should focus on other matrices beyond epoxy as well as on the development of standardised testing methods.
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Affiliation(s)
- Rui Barreira-Pinto
- Departamento de Engenharia Mecânica Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Rodrigo Carneiro
- Departamento de Engenharia Mecânica Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Mário Miranda
- Departamento de Engenharia Mecânica Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Rui Miranda Guedes
- Departamento de Engenharia Mecânica Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- INEGI-Instituto de Engenharia Mecânica e Gestão Industrial, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
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3
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Navya PV, Gayathri V, Samanta D, Sampath S. Bacterial cellulose: A promising biopolymer with interesting properties and applications. Int J Biol Macromol 2022; 220:435-461. [PMID: 35963354 DOI: 10.1016/j.ijbiomac.2022.08.056] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 07/24/2022] [Accepted: 08/08/2022] [Indexed: 11/24/2022]
Abstract
The ever-increasing demands for materials with desirable properties led to the development of materials that impose unfavorable influences on the environment and the ecosystem. Developing a low-cost, durable, and eco-friendly functional material with biological origins has become necessary to avoid these consequences. Bacterial cellulose generated by bacteria dispenses excellent structural and functional properties and satisfies these requirements. BC and BC-derived materials are essential in developing pure and environmentally safe functional materials. This review offers a detailed understanding of the biosynthesis of BC, properties, various functionalization methods, and applicability in biomedical, water treatment, food storage, energy conversion, and energy storage applications.
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Affiliation(s)
- P V Navya
- Department of Materials Science, School of Technology, Central University of Tamil Nadu, Thiruvarur 610101, India.
| | - Varnakumar Gayathri
- Polymer Science and Technology Department, CSIR-Central Leather Research Institute, Adyar, Chennai 600020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Debasis Samanta
- Polymer Science and Technology Department, CSIR-Central Leather Research Institute, Adyar, Chennai 600020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Srinivasan Sampath
- Department of Materials Science, School of Technology, Central University of Tamil Nadu, Thiruvarur 610101, India.
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Erdal NB, Hakkarainen M. Degradation of Cellulose Derivatives in Laboratory, Man-Made, and Natural Environments. Biomacromolecules 2022; 23:2713-2729. [PMID: 35763720 PMCID: PMC9277587 DOI: 10.1021/acs.biomac.2c00336] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Biodegradable polymers complement recyclable materials in battling plastic waste because some products are difficult to recycle and some will end up in the environment either because of their application or due to wear of the products. Natural biopolymers, such as cellulose, are inherently biodegradable, but chemical modification typically required for the obtainment of thermoplastic properties, solubility, or other desired material properties can hinder or even prevent the biodegradation process. This Review summarizes current knowledge on the degradation of common cellulose derivatives in different laboratory, natural, and man-made environments. Depending on the environment, the degradation can be solely biodegradation or a combination of several processes, such as chemical and enzymatic hydrolysis, photodegradation, and oxidation. It is clear that the type of modification and especially the degree of substitution are important factors controlling the degradation process of cellulose derivatives in combination with the degradation environment. The big variation of conditions in different environments is also briefly considered as well as the importance of the proper testing environment, characterization of the degradation process, and confirmation of biodegradability. To ensure full sustainability of the new cellulose derivatives under development, the expected end-of-life scenario, whether material recycling or "biological" recycling, should be included as an important design parameter.
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Affiliation(s)
- Nejla B Erdal
- KTH Royal Institute of Technology, FibRe - Centre for Lignocellulose-based Thermoplastics, Department of Fibre and Polymer Technology, Teknikringen 58, SE-100 44 Stockholm, Sweden
| | - Minna Hakkarainen
- KTH Royal Institute of Technology, FibRe - Centre for Lignocellulose-based Thermoplastics, Department of Fibre and Polymer Technology, Teknikringen 58, SE-100 44 Stockholm, Sweden
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5
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Su M, Wu J, Pan P, Wang H. Preparation and characterization of a water-resistant polyamide-oxidized starch-methyl methacrylate eco-friendly wood adhesive. Int J Biol Macromol 2022; 194:763-769. [PMID: 34826452 DOI: 10.1016/j.ijbiomac.2021.11.123] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 10/20/2021] [Accepted: 11/17/2021] [Indexed: 02/06/2023]
Abstract
A water-resistant polyamide-oxidized starch-methyl methacrylate (P-OS-M) adhesive with zero formaldehyde-emission was successfully synthesized, using natural corn starch, KMnO4, polyamide and methyl methacrylate as raw material, oxidant, crosslinking agent and comonomer, respectively. The P-OS-M25 adhesive synthesized with the optimal amount of methyl methacrylate (25 ml) could reach wet shear strength of 1.04 MPa, which was far greater than natural starch (NS) and oxidized starch (OS). Fourier transforms infrared spectrometer (FTIR) and X-ray diffraction (XRD) results showed that polyamide and methyl methacrylate were successfully cross-linked and copolymerized with oxidized starch. In addition, thermogravimetric analysis (TGA), rheology, scanning electron microscope (SEM) and contact angle respectively indicated that P-OS-M adhesive was suitable for wood adhesives in terms of thermal stability, viscosity, morphological and water resistence. These advantages increased the possibility of P-OS-M adhesive instead of petroleum-based wood adhesives.
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Affiliation(s)
- Mengdie Su
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Jinfu Wu
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Peidi Pan
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Haijun Wang
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
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Lu Q, Yu X, Yagoub AEA, Wahia H, Zhou C. Application and challenge of nanocellulose in the food industry. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2021.101285] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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7
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Bari E, Sistani A, Morrell JJ, Pizzi A, Akbari MR, Ribera J. Current Strategies for the Production of Sustainable Biopolymer Composites. Polymers (Basel) 2021; 13:2878. [PMID: 34502919 PMCID: PMC8434032 DOI: 10.3390/polym13172878] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 08/20/2021] [Accepted: 08/21/2021] [Indexed: 11/16/2022] Open
Abstract
Rapid global population growth has led to an exponential increase in the use of disposable materials with a short life span that accumulate in landfills. The use of non-biodegradable materials causes severe damage to the environment worldwide. Polymers derived from agricultural residues, wood, or other fiber crops are fully biodegradable, creating the potential to be part of a sustainable circular economy. Ideally, natural fibers, such as the extremely strong fibers from hemp, can be combined with matrix materials such as the core or hurd from hemp or kenaf to produce a completely renewable biomaterial. However, these materials cannot always meet all of the performance attributes required, necessitating the creation of blends of petroleum-based and renewable material-based composites. This article reviews composites made from natural and biodegradable polymers, as well as the challenges encountered in their production and use.
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Affiliation(s)
- Ehsan Bari
- Department of Wood Sciences and Engineering, Technical Faculty of No. 2, Mazandaran Branch, Technical and Vocational University (TVU), Sari 4816831168, Iran;
| | - Asghar Sistani
- Department of Wood Sciences and Engineering, Technical Faculty of No. 2, Mazandaran Branch, Technical and Vocational University (TVU), Sari 4816831168, Iran;
| | - Jeffrey J. Morrell
- National Centre for Timber Durability and Design Life, University of the Sunshine Coast, Brisbane, QLD 4102, Australia;
| | - Antonio Pizzi
- LERMAB-ENSTIB, University of Lorraine, 27 rue Philippe Seguin, 88000 Epinal, France;
| | - Mohammad Reza Akbari
- Department of Wood and Paper Sciences, Tarbiat Modares University, Jalal AleAhmad, Nasr, Tehran P.O. Box 14115-111, Iran;
| | - Javier Ribera
- Laboratory for Cellulose & Wood Materials, Empa-Swiss Federal Laboratories for Materials Science and Technology, CH-9014 St. Gallen, Switzerland
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Ding R, Hu S, Xu M, Hu Q, Jiang S, Xu K, Tremblay PL, Zhang T. The facile and controllable synthesis of a bacterial cellulose/polyhydroxybutyrate composite by co-culturing Gluconacetobacter xylinus and Ralstonia eutropha. Carbohydr Polym 2021; 252:117137. [DOI: 10.1016/j.carbpol.2020.117137] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/24/2020] [Accepted: 09/21/2020] [Indexed: 10/23/2022]
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Brebu M. Environmental Degradation of Plastic Composites with Natural Fillers-A Review. Polymers (Basel) 2020; 12:polym12010166. [PMID: 31936374 PMCID: PMC7022390 DOI: 10.3390/polym12010166] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 12/23/2019] [Accepted: 01/01/2020] [Indexed: 02/07/2023] Open
Abstract
Polymer composites are widely used modern-day materials, specially designed to combine good mechanical properties and low density, resulting in a high tensile strength-to-weight ratio. However, materials for outdoor use suffer from the negative effects of environmental factors, loosing properties in various degrees. In particular, natural fillers (particulates or fibers) or components induce biodegradability in the otherwise bio inert matrix of usual commodity plastics. Here we present some aspects found in recent literature related to the effect of aggressive factors such as temperature, mechanical forces, solar radiation, humidity, and biological attack on the properties of plastic composites containing natural fillers.
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Affiliation(s)
- Mihai Brebu
- "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
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10
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Uma V, Gandhimathi R. Organic removal and synthesis of biopolymer from synthetic oily bilge water using the novel mixed bacterial consortium. BIORESOURCE TECHNOLOGY 2019; 273:169-176. [PMID: 30445269 DOI: 10.1016/j.biortech.2018.11.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 10/31/2018] [Accepted: 11/01/2018] [Indexed: 06/09/2023]
Abstract
Synthetic oily bilge water (OBW) treatment and subsequent production of biopolymer were studied by using a sequential batch reactor (SBR). The effect of various influencing parameters such as solids retention time (SRT), cycle time (CT), substrate concentration, pH level on the organic removal and synthesis of polyhydroxyalkanoates (PHA) was examined by novel soil bacteria isolated from hydrocarbon contaminated site near Karaikal port, India. The isolates were identified as Pseudomonas tuomuerensis and Pseudomonas nitroreducens using 16S rRNA. Sudan Black B staining was performed to visualize the presence of PHA. The experimental results showed that a decrease in substrate concentration to 5000 mg/L of soluble COD (CODs) showed maximum organic removal (81%) and maximum PHA yields of its cell dry mass (81%). The PHA yield was maximum at SRT of 5 d, pH = 7 and CT of 24 h. The produced PHA was characterized by using FTIR, XRD and SEM analysis.
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Affiliation(s)
- V Uma
- Department of Civil Engineering, National Institute of Technology, Tiruchirappalli, Tamilnadu 620 015, India
| | - R Gandhimathi
- Department of Civil Engineering, National Institute of Technology, Tiruchirappalli, Tamilnadu 620 015, India.
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Synthesis and characterization of starch-g-poly(vinyl acetate-co-butyl acrylate) bio-based adhesive for wood application. Int J Biol Macromol 2018; 114:1186-1193. [PMID: 29625220 DOI: 10.1016/j.ijbiomac.2018.03.178] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 03/28/2018] [Accepted: 03/29/2018] [Indexed: 01/27/2023]
Abstract
Enhancing the performance of wood adhesive is important for its industrial applications. Accordingly, we designed and demonstrated the use of two co-monomers vinyl acetate (VAc) and butyl acrylate (BA) for promoting the graft copolymerization while improving the bonding performance of wood adhesive. The results showed that the addition of co-monomers in the ratio of VAc/BA 6:4 (v/v, volume basis of VAc) could improve the shear strength to 6.68MPa and 3.32MPa in dry and wet states, respectively. 1H-nuclear magnetic resonance (1H NMR) and fourier transform infrared spectroscopy (FT-IR) analysis revealed successful graft copolymerization reaction while the morphologies were observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Furthermore, the grafting reaction and thermal stabilities of wood adhesive were analyzed by X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA). The results showed that the properties of wood adhesive could improve dramatically by using two co-monomers VAc and BA during the graft copolymerization reaction.
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12
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Abdul Rashid ES, Muhd Julkapli N, Yehye WA. Nanocellulose reinforced as green agent in polymer matrix composites applications. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4264] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Erfan Suryani Abdul Rashid
- Nanotechnology and Catalysis Research Centre (NANOCAT); University of Malaya; Block A, Level 3, Institute of Postgraduate Studies Building Kuala Lumpur 50603 Malaysia
| | - Nurhidayatullaili Muhd Julkapli
- Nanotechnology and Catalysis Research Centre (NANOCAT); University of Malaya; Block A, Level 3, Institute of Postgraduate Studies Building Kuala Lumpur 50603 Malaysia
| | - Wageeh A. Yehye
- Nanotechnology and Catalysis Research Centre (NANOCAT); University of Malaya; Block A, Level 3, Institute of Postgraduate Studies Building Kuala Lumpur 50603 Malaysia
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13
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Electrospun carboxyl multi-walled carbon nanotubes grafted polyhydroxybutyrate composite nanofibers membrane scaffolds: Preparation, characterization and cytocompatibility. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 82:29-40. [DOI: 10.1016/j.msec.2017.08.005] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 07/17/2017] [Accepted: 08/02/2017] [Indexed: 12/15/2022]
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14
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Effect of Cellulose Nanocrystals and Bacterial Cellulose on Disintegrability in Composting Conditions of Plasticized PHB Nanocomposites. Polymers (Basel) 2017; 9:polym9110561. [PMID: 30965865 PMCID: PMC6418597 DOI: 10.3390/polym9110561] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 10/23/2017] [Accepted: 10/26/2017] [Indexed: 11/17/2022] Open
Abstract
Poly(hydroxybutyrate) (PHB)-based films, reinforced with bacterial cellulose (BC) or cellulose nanocrystals (CNC) and plasticized using a molecular (tributyrin) or a polymeric plasticizer (poly(adipate diethylene)), were produced by solvent casting. Their morphological, thermal, wettability, and chemical properties were investigated. Furthermore, the effect of adding both plasticizers (20 wt % respect to the PHB content) and biobased selected nanofillers added at different contents (2 and 4 wt %) on disintegrability in composting conditions was studied. Results of contact angle measurements and calorimetric analysis validated the observed behavior during composting experiments, indicating how CNC aggregation, due to the hydrophilic nature of the filler, slows down the degradation rate but accelerates it in case of increasing content. In contrast, nanocomposites with BC presented an evolution in composting similar to neat PHB, possibly due to the lower hydrophilic character of this material. The addition of the two plasticizers contributed to a better dispersion of the nanoparticles by increasing the interaction between the cellulosic reinforcements and the matrix, whereas the increased crystallinity of the incubated samples in a second stage in composting provoked a reduction in the disintegration rate.
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Volova TG, Prudnikova SV, Vinogradova ON, Syrvacheva DA, Shishatskaya EI. Microbial Degradation of Polyhydroxyalkanoates with Different Chemical Compositions and Their Biodegradability. MICROBIAL ECOLOGY 2017; 73:353-367. [PMID: 27623963 DOI: 10.1007/s00248-016-0852-3] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 08/29/2016] [Indexed: 06/06/2023]
Abstract
The study addresses degradation of polyhydroxyalkanoates (PHA) with different chemical compositions-the polymer of 3-hydroxybutyric acid [P(3HB)] and copolymers of P(3HB) with 3-hydroxyvalerate [P(3HB/3HV)], 4-hydroxybutyrate [P(3HB/4HB)], and 3-hydroxyhexanoate [P(3HB/3HHx)] (10-12 mol%)-in the agro-transformed field soil of the temperate zone. Based on their degradation rates at 21 and 28 °C, polymers can be ranked as follows: P(3HB/4HB) > P(3HB/3HHx) > P(3HB/3HV) > P(3HB). The microbial community on the surface of the polymers differs from the microbial community of the soil with PHA specimens in the composition and percentages of species. Thirty-five isolates of bacteria of 16 genera were identified as PHA degraders by the clear zone technique, and each of the PHA had both specific and common degraders. P(3HB) was degraded by bacteria of the genera Mitsuaria, Chitinophaga, and Acidovorax, which were not among the degraders of the three other PHA types. Roseateles depolymerans, Streptomyces gardneri, and Cupriavidus sp. were specific degraders of P(3HB/4HB). Roseomonas massiliae and Delftia acidovorans degraded P(3HB/3HV), and Pseudoxanthomonas sp., Pseudomonas fluorescens, Ensifer adhaerens, and Bacillus pumilus were specific P(3HB/3HHx) degraders. All four PHA types were degraded by Streptomyces.
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Affiliation(s)
- Tatiana G Volova
- Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok 50/50, Krasnoyarsk, Russia.
| | - Svetlana V Prudnikova
- Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok 50/50, Krasnoyarsk, Russia
| | - Olga N Vinogradova
- Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok 50/50, Krasnoyarsk, Russia
| | - Darya A Syrvacheva
- Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok 50/50, Krasnoyarsk, Russia
| | - Ekaterina I Shishatskaya
- Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok 50/50, Krasnoyarsk, Russia
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16
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Garcia-Garcia D, Ferri JM, Montanes N, Lopez-Martinez J, Balart R. Plasticization effects of epoxidized vegetable oils on mechanical properties of poly(3-hydroxybutyrate). POLYM INT 2016. [DOI: 10.1002/pi.5164] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Daniel Garcia-Garcia
- Instituto de Tecnología de Materiales (ITM); Universitat Politècnica de València (UPV); Plaza Ferrándiz y Carbonell 1 03801 Alcoy Alicante Spain
| | - Jose M Ferri
- Instituto de Tecnología de Materiales (ITM); Universitat Politècnica de València (UPV); Plaza Ferrándiz y Carbonell 1 03801 Alcoy Alicante Spain
| | - Nestor Montanes
- Instituto de Tecnología de Materiales (ITM); Universitat Politècnica de València (UPV); Plaza Ferrándiz y Carbonell 1 03801 Alcoy Alicante Spain
| | - Juan Lopez-Martinez
- Instituto de Tecnología de Materiales (ITM); Universitat Politècnica de València (UPV); Plaza Ferrándiz y Carbonell 1 03801 Alcoy Alicante Spain
| | - Rafael Balart
- Instituto de Tecnología de Materiales (ITM); Universitat Politècnica de València (UPV); Plaza Ferrándiz y Carbonell 1 03801 Alcoy Alicante Spain
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