1
|
Ren H, Huang Y, Yang W, Ling Z, Liu S, Zheng S, Li S, Wang Y, Pan L, Fan W, Zheng Y. Emerging nanocellulose from agricultural waste: Recent advances in preparation and applications in biobased food packaging. Int J Biol Macromol 2024; 277:134512. [PMID: 39111480 DOI: 10.1016/j.ijbiomac.2024.134512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 07/30/2024] [Accepted: 08/03/2024] [Indexed: 08/11/2024]
Abstract
With the increasing emphasis on sustainability and eco-friendliness, a novel biodegradable packaging materials has received unprecedented attention. Nanocellulose, owing to its high crystallinity, degradability, minimal toxicity, and outstanding biocompatibility, has gained considerable interest in the field of sustainable packaging. This review provided a comprehensive perspective about the recent advances and future development of cellulose nanocrystals (CNCs) and cellulose nanofibers (CNFs). We first introduced the utilization of agricultural waste for nanocellulose production, such as straw, bagasse, fruit byproducts, and shells. Next, we discussed the preparation process of nanocellulose from various agricultural wastes and expounded the advantages and shortcomings of different methods. Subsequently, this review offered an in-depth investigation on the application of nanocellulose in food packaging, especially the function and packaged form of nanocellulose on food preservation. Finally, the safety evaluation of nanocellulose in food packaging is conducted to enlighten and promote the perfection of relevant regulatory documents. In short, this review provided valuable insights for potential research on the biobased materials utilized in future food packaging.
Collapse
Affiliation(s)
- Haiwei Ren
- School of Life Science and Engineering, Lanzhou University of Technology, 287 Langongping Road, Lanzhou, Gansu Province 730050, PR China; China Northwest Collaborative Innovation Center of Low-carbon Unbanization Technologies of Gansu and MOE, 287 Langongping Road, Lanzhou, Gansu Province 730050, PR China
| | - Yu Huang
- School of Life Science and Engineering, Lanzhou University of Technology, 287 Langongping Road, Lanzhou, Gansu Province 730050, PR China
| | - Weixia Yang
- School of Life Science and Engineering, Lanzhou University of Technology, 287 Langongping Road, Lanzhou, Gansu Province 730050, PR China; China Northwest Collaborative Innovation Center of Low-carbon Unbanization Technologies of Gansu and MOE, 287 Langongping Road, Lanzhou, Gansu Province 730050, PR China.
| | - Zhe Ling
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, PR China
| | - Sifan Liu
- School of Life Science and Engineering, Lanzhou University of Technology, 287 Langongping Road, Lanzhou, Gansu Province 730050, PR China
| | - Shiyu Zheng
- School of Life Science and Engineering, Lanzhou University of Technology, 287 Langongping Road, Lanzhou, Gansu Province 730050, PR China
| | - Siqi Li
- School of Life Science and Engineering, Lanzhou University of Technology, 287 Langongping Road, Lanzhou, Gansu Province 730050, PR China
| | - Yu Wang
- China Northwest Collaborative Innovation Center of Low-carbon Unbanization Technologies of Gansu and MOE, 287 Langongping Road, Lanzhou, Gansu Province 730050, PR China
| | - Lichao Pan
- School of Life Science and Engineering, Lanzhou University of Technology, 287 Langongping Road, Lanzhou, Gansu Province 730050, PR China
| | - Wenguang Fan
- School of Life Science and Engineering, Lanzhou University of Technology, 287 Langongping Road, Lanzhou, Gansu Province 730050, PR China
| | - Yi Zheng
- Department of Grain Science and Industry, Kansas State University, 101C BIVAP, 1980 Kimball Avenue, Manhattan, KS 66506, United States
| |
Collapse
|
2
|
Dong Y, Xie Y, Ma X, Yan L, Yu HY, Yang M, Abdalkarim SYH, Jia B. Multi-functional nanocellulose based nanocomposites for biodegradable food packaging: Hybridization, fabrication, key properties and application. Carbohydr Polym 2023; 321:121325. [PMID: 37739512 DOI: 10.1016/j.carbpol.2023.121325] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 08/05/2023] [Accepted: 08/21/2023] [Indexed: 09/24/2023]
Abstract
Nowadays, non-degradable plastic packaging materials have caused serious environmental pollution, posing a threat to human health and development. Renewable eco-friendly nanocellulose hybrid (NCs-hybrid) composites as an ideal alternative to petroleum-based plastic food packaging have been extensively reported in recent years. NCs-hybrids include metal, metal oxides, organic frameworks (MOFs), plants, and active compounds. However, no review systematically summarizes the preparation, processing, and multi-functional applications of NCs-hybrid composites. In this review, the design and hybridization of various NCs-hybrids, the processing of multi-scale nanocomposites, and their key properties in food packaging applications were systematically explored for the first time. Moreover, the synergistic effects of various NCs-hybrids on several properties of composites, including mechanical, thermal, UV shielding, waterproofing, barrier, antimicrobial, antioxidant, biodegradation and sensing were reviewed in detailed. Then, the problems and advances in research on renewable NCs-hybrid composites are suggested for biodegradable food packaging applications. Finally, a future packaging material is proposed by using NCs-hybrids as nanofillers and endowing them with various properties, which are denoted as "PACKAGE" and characterized by "Property, Application, Cellulose, Keen, Antipollution, Green, Easy."
Collapse
Affiliation(s)
- Yanjuan Dong
- The Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Xiasha Higher Education Park Avenue 2 No.928, Hangzhou 310018, China
| | - Yao Xie
- The Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Xiasha Higher Education Park Avenue 2 No.928, Hangzhou 310018, China
| | - Xue Ma
- The Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Xiasha Higher Education Park Avenue 2 No.928, Hangzhou 310018, China
| | - Ling Yan
- The Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Xiasha Higher Education Park Avenue 2 No.928, Hangzhou 310018, China
| | - Hou-Yong Yu
- The Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Xiasha Higher Education Park Avenue 2 No.928, Hangzhou 310018, China; Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada.
| | - Mingchen Yang
- The Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Xiasha Higher Education Park Avenue 2 No.928, Hangzhou 310018, China
| | - Somia Yassin Hussain Abdalkarim
- The Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Xiasha Higher Education Park Avenue 2 No.928, Hangzhou 310018, China.
| | - Bowen Jia
- The Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Xiasha Higher Education Park Avenue 2 No.928, Hangzhou 310018, China
| |
Collapse
|
3
|
Bao J, Hu Y, Farag MA, Huan W, Wu J, Yang D, Song L. Carbon dots, cellulose nanofiber, and essential oil from Torreya grandis aril added to fish scale gelatin film for tomato preservation. Int J Biol Macromol 2023:125482. [PMID: 37348576 DOI: 10.1016/j.ijbiomac.2023.125482] [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: 03/25/2023] [Revised: 06/09/2023] [Accepted: 06/17/2023] [Indexed: 06/24/2023]
Abstract
In this study, carbon dots (CDs), cellulose nanofibers (CNF) and essential oil nanoemulsion (EON) were extracted from the aril waste of Torreya grandis following nuts production. These three nanomaterials were formulated for the preparation of a composite film to be employed for postharvest tomato storage. Visual, microscopical and physicochemical properties of the prepared nanocomposite films were analyzed at different levels of CDs and CNF for optimization purposes. The UV absorption and antioxidant capacity of gelatin film with 10 % CDs (G/10CD) were enhanced compared with gelatin (G) film, concurrent with a reduction in water barrier capacity, water contact angle (WCA) and tensile strength (TS). Compared with G/10CD film, the WCA of gelatin film after incorporation of 10 % CDs and 3 % CNF (G/10CD/3CNF) was significantly increased by 14.5°at 55 s. In contrast, TS increased by 1.26 MPa, as well as the significant enhancement in water barrier capacity. The above composite film mixed with NEO (G/10CD/3CNF/EON) exerted further antimicrobial effects against Escherichia coli. G/10CD/3CNF/EON coating effectively extended tomato shift life compared with the control group. Therefore, this new eco-friendly film presents several advantages of biodegradability, sustainability as well as multifunctional properties posing it as potential packaging material for food applications.
Collapse
Affiliation(s)
- Junjun Bao
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an 311300, Zhejiang Province, People's Republic of China
| | - Yuanyuan Hu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an 311300, Zhejiang Province, People's Republic of China
| | - Mohamed A Farag
- Pharmacognosy Department, College of Pharmacy, Cairo University, Kasr el Aini st., 16, Cairo P.B. 11562, Egypt
| | - Weiwei Huan
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an 311300, Zhejiang Province, People's Republic of China
| | - Jiasheng Wu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an 311300, Zhejiang Province, People's Republic of China.
| | - Dapeng Yang
- Fujian Province Key Laboratory for Preparation and Function Development of Active Substances from Marine Algae, College of Oceanology and Food Science, Quanzhou Normal University, Quanzhou, Fujian 362000, China.
| | - Lili Song
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an 311300, Zhejiang Province, People's Republic of China.
| |
Collapse
|
4
|
Mittag A, Rahman MM, Hafez I, Tajvidi M. Development of Lignin-Containing Cellulose Nanofibrils Coated Paper-Based Filters for Effective Oil-Water Separation. MEMBRANES 2022; 13:1. [PMID: 36676808 PMCID: PMC9862162 DOI: 10.3390/membranes13010001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 06/17/2023]
Abstract
New methods of oil-water separation are needed as industrialization has increased the prevalence of oil-water mixtures on Earth. As an abundant and renewable resource with high oxygen and grease barrier properties, mechanically refined cellulose nanofibrils (CNFs) may have promising applications for oil-water separations. The unbleached form of these nanofibrils, lignin-containing CNFs (LCNFs), have also been found to display extraordinary barrier properties and are more environmentally friendly and cost-effective than CNFs. Herein, both wet and dry LCNF-modified filter papers have been developed by coating commercial filter paper with an LCNF suspension utilizing vacuum filtration. The LCNF-modified filters were tested for effectiveness in separating oil-water emulsions, and a positive relationship was discovered between a filter's LCNF coat weight and its oil collection capabilities. The filtration time was also analyzed for various coat weights, revealing a trend of high flux for low LCNF coat weights giving-way-to predictions of a coat weight upper limit. Additionally, it was found that wet filters tend to have higher flux values and oil separation efficiency values than dry filters of the same LCNF coat weight. Results confirm that the addition of LCNF to commercial filter papers has the potential to be used in oil-water separation.
Collapse
Affiliation(s)
- Anna Mittag
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Md Musfiqur Rahman
- Laboratory of Renewable Nanomaterials, School of Forest Resources, University of Maine, 5755 Nutting Hall, Orono, ME 04469, USA
| | - Islam Hafez
- Laboratory of Renewable Nanomaterials, School of Forest Resources, University of Maine, 5755 Nutting Hall, Orono, ME 04469, USA
| | - Mehdi Tajvidi
- Laboratory of Renewable Nanomaterials, School of Forest Resources, University of Maine, 5755 Nutting Hall, Orono, ME 04469, USA
| |
Collapse
|
5
|
Jung K, Ji Y, Jeong TJ, Ciesielski PN, Meredith JC, Harris TAL. Roll-to-Roll, Dual-Layer Slot Die Coating of Chitin and Cellulose Oxygen Barrier Films for Renewable Packaging. ACS APPLIED MATERIALS & INTERFACES 2022; 14:44922-44932. [PMID: 36129845 DOI: 10.1021/acsami.2c09925] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Cellulose and chitin are the two most abundant naturally produced biopolymers and are being extensively studied as candidates for renewable oxygen barrier films used in packaging. It has been shown that bilayers formed from cellulose nanocrystals (CNCs) and chitin nanofibers (ChNFs) exhibit oxygen barrier properties similar to polyethylene terephthalate (PET). However, this prior work explored only coating each layer individually in sequence through techniques such as spray coating. Here, we demonstrate the viability of dual-layer slot die coating of CNC/ChNF bilayers onto cellulose acetate (CA) substrates. The dual-layer slot die method enables significantly lower oxygen permeability versus spray coating while using a roll-to-roll system that applies the bilayer in a single pass. This work discusses suspension properties, wetting, and drying conditions required to achieve well-controlled ChNF/CNC bilayers. Spray-coated bilayer films were on average 25% thinner than the dual-layer bilayer film; however, the thickness-normalized oxygen permeability (OP) of the dual-layer-coated ChNF/CNC bilayer film on CA was 20 times better than that of the spray-coated bilayers. It has been shown that ChNF contributes to the wetting and barrier properties. Values of OP for the slot die-coated bilayers under optimized drying conditions were as low as 1.2 cm3·μm·m-2·d-1·kPa-1, corresponding to a normalized oxygen transmission rate of 0.32 cm3·m-2·d-1 at 23 °C and 50% relative humidity. It is also noted that the adhesive properties of the dual-layer coating are also improved when films are air-dried and that ChNF contributes to the wetting and barrier properties.
Collapse
Affiliation(s)
- Kwangjun Jung
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 United States
| | - Yue Ji
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 United States
| | - Tae-Joong Jeong
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 United States
| | - Peter N Ciesielski
- National Renewable Energy Laboratory, Atlanta, Georgia 30332 United States
| | - J Carson Meredith
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 United States
| | - Tequila A L Harris
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 United States
| |
Collapse
|
6
|
Sharma M, Aguado R, Murtinho D, Valente AJM, Ferreira PJT. Micro-/Nanofibrillated Cellulose-Based Coating Formulations: A Solution for Improving Paper Printing Quality. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12162853. [PMID: 36014716 PMCID: PMC9414902 DOI: 10.3390/nano12162853] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/14/2022] [Accepted: 08/15/2022] [Indexed: 06/01/2023]
Abstract
The use of micro-/nanofibrillated celluloses (M/NFCs) is often considered for the enhancement of paper properties, while it is still challenging to use them in lower weight gain coatings. This work explores how they might be used on the paper surface to improve the printing quality. In this regard, M/NFCs were produced using different pre-treatment methods, including mechanical (m-MFC), enzymatic (e-MFC), TEMPO-mediated oxidation (t-NFC) and cationization (c-NFC), and uniform coating formulations were developed through the cooking of starch and M/NFCs simultaneously. The formulations, at 6-8% of total solid concentration, were applied to the paper surface by roll coating, resulting in a dry coating weight of 1.5 to 3 g/m2. Besides M/NFCs, other components such as starch betainate (a cationic starch ester; SB), Pluronics® (a triblock co-polymer), precipitated calcium carbonate (PCC) and betaine hydrochloride (BetHCl) were also used in the M/NFC-based coating formulations to observe their combined influence on the printing quality. The presence of M/NFCs improved the paper printing quality, which was further enhanced by the increase in cationic charge density due to the presence of BetHCl/SB, and also by Pluronics®. The cationic charge of c-NFC was also found to be effective for improving the gamut area and optical density of coated papers, whereas whiteness was often reduced due to the quenching of the brightening agent. BetHCl, on the other hand, improved the printing quality of the coated papers, even though it was more effective when combined with M/NFCs, PCC and Pluronics®, and also helped to retain paper whiteness.
Collapse
Affiliation(s)
- Mohit Sharma
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, Rua Sílvio Lima, Pólo II–Pinhal de Marrocos, 3030-790 Coimbra, Portugal
| | - Roberto Aguado
- LEPAMAP-PRODIS Research Group, University of Girona, M Aurèlia Capmany 61, 17003 Girona, Spain
| | - Dina Murtinho
- University of Coimbra, CQC, Department of Chemistry, Rua Larga, 3004-535 Coimbra, Portugal
| | - Artur J. M. Valente
- University of Coimbra, CQC, Department of Chemistry, Rua Larga, 3004-535 Coimbra, Portugal
| | - Paulo J. T. Ferreira
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, Rua Sílvio Lima, Pólo II–Pinhal de Marrocos, 3030-790 Coimbra, Portugal
| |
Collapse
|
7
|
Spagnuolo L, D'Orsi R, Operamolla A. Nanocellulose for Paper and Textile Coating: The Importance of Surface Chemistry. Chempluschem 2022; 87:e202200204. [PMID: 36000154 DOI: 10.1002/cplu.202200204] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 07/29/2022] [Indexed: 11/11/2022]
Abstract
Nanocellulose has received enormous scientific interest for its abundance, easy manufacturing, biodegradability, and low cost. Cellulose nanocrystals (CNCs) and cellulose nanofibers (CNFs) are ideal candidates to replace plastic coating in the textile and paper industry. Thanks to their capacity to form an interconnected network kept together by hydrogen bonds, nanocelluloses perform an unprecedented strengthening action towards cellulose- and other fiber-based materials. Furthermore, nanocellulose use implies greener application procedures, such as deposition from water. The surface chemistry of nanocellulose plays a pivotal role in influencing the performance of the coating: tailored surface functionalization can introduce several properties, such as gas or grease barrier, hydrophobicity, antibacterial and anti-UV behavior. This review summarizes recent achievements in the use of nanocellulose for paper and textile coating, evidencing critical aspects of coating performances related to deposition technique, nanocellulose morphology, and surface functionalization. Furthermore, beyond focusing on the aspects strictly related to large-scale coating applications for paper and textile industries, this review includes recent achievements in the use of nanocellulose coating for the safeguarding of Cultural Heritage, an extremely noble and interesting emerging application of nanocellulose, focusing on consolidation of historical paper and archaeological textile. Finally, nanocellulose use in electronic devices as an electrode modifier is highlighted.
Collapse
Affiliation(s)
- Laura Spagnuolo
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, via Giuseppe Moruzzi, 13, 56124, Pisa, Italy.,Interuniversity Consortium of Chemical Reactivity and Catalysis (CIRCC), Via Celso Ulpiani 27, Bari, 70126, Italy
| | - Rosarita D'Orsi
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, via Giuseppe Moruzzi, 13, 56124, Pisa, Italy.,Interuniversity Consortium of Chemical Reactivity and Catalysis (CIRCC), Via Celso Ulpiani 27, Bari, 70126, Italy
| | - Alessandra Operamolla
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, via Giuseppe Moruzzi, 13, 56124, Pisa, Italy.,Interuniversity Consortium of Chemical Reactivity and Catalysis (CIRCC), Via Celso Ulpiani 27, Bari, 70126, Italy
| |
Collapse
|
8
|
Pasquier E, Mattos BD, Koivula H, Khakalo A, Belgacem MN, Rojas OJ, Bras J. Multilayers of Renewable Nanostructured Materials with High Oxygen and Water Vapor Barriers for Food Packaging. ACS APPLIED MATERIALS & INTERFACES 2022; 14:30236-30245. [PMID: 35727693 PMCID: PMC9815692 DOI: 10.1021/acsami.2c07579] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Natural biopolymers have become key players in the preparation of biodegradable food packaging. However, biopolymers are typically highly hydrophilic, which imposes limitations in terms of barrier properties that are associated with water interactions. Here, we enhance the barrier properties of biobased packaging using multilayer designs, in which each layer displays a complementary barrier function. Oxygen, water vapor, and UV barriers were achieved using a stepwise assembly of cellulose nanofibers, biobased wax, and lignin particles supported by chitin nanofibers. We first engineered several designs containing CNFs and carnauba wax. Among them, we obtained low water vapor permeabilities in an assembly containing three layers, i.e., CNF/wax/CNF, in which wax was present as a continuous layer. We then incorporated a layer of lignin nanoparticles nucleated on chitin nanofibrils (LPChNF) to introduce a complete barrier against UV light, while maintaining film translucency. Our multilayer design which comprised CNF/wax/LPChNF enabled high oxygen (OTR of 3 ± 1 cm3/m2·day) and water vapor (WVTR of 6 ± 1 g/m2·day) barriers at 50% relative humidity. It was also effective against oil penetration. Oxygen permeability was controlled by the presence of tight networks of cellulose and chitin nanofibers, while water vapor diffusion through the assembly was regulated by the continuous wax layer. Lastly, we showcased our fully renewable packaging material for preservation of the texture of a commercial cracker (dry food). Our material showed functionality similar to that of the original packaging, which was composed of synthetic polymers.
Collapse
Affiliation(s)
- Eva Pasquier
- Université
Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering), LGP2, F-38000 Grenoble, France
- Department
of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O.
Box 16300, Aalto, FIN-00076 Espoo, Finland
| | - Bruno D. Mattos
- Department
of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O.
Box 16300, Aalto, FIN-00076 Espoo, Finland
| | - Hanna Koivula
- Department
of Food and Nutrition and Helsinki Institute of Sustainability Science, University of Helsinki, Agnes Sjöobergin katu 2, P.O. Box 66, FIN-00014 Helsinki, Finland
| | - Alexey Khakalo
- VTT
Technical Research Centre of Finland Ltd., Tietotie 4E, P.O. Box 1000, FIN-02044 Espoo, Finland
| | - Mohamed Naceur Belgacem
- Université
Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering), LGP2, F-38000 Grenoble, France
- Institut
Universitaire de France (IUF), F-75000 Paris, France
| | - Orlando J. Rojas
- Department
of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O.
Box 16300, Aalto, FIN-00076 Espoo, Finland
- Bioproducts
Institute, Department of Chemical and Biological Engineering, Departments
of Chemistry and Departments of Wood Science, University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada
| | - Julien Bras
- Université
Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering), LGP2, F-38000 Grenoble, France
| |
Collapse
|
9
|
Wang Q, Liu S, Liu J, Sun J, Zhang Z, Zhu Q. Sustainable cellulose nanomaterials for environmental remediation - Achieving clean air, water, and energy: A review. Carbohydr Polym 2022; 285:119251. [DOI: 10.1016/j.carbpol.2022.119251] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/09/2022] [Accepted: 02/09/2022] [Indexed: 01/09/2023]
|
10
|
Liu W, Liu K, Du H, Zheng T, Zhang N, Xu T, Pang B, Zhang X, Si C, Zhang K. Cellulose Nanopaper: Fabrication, Functionalization, and Applications. NANO-MICRO LETTERS 2022; 14:104. [PMID: 35416525 PMCID: PMC9008119 DOI: 10.1007/s40820-022-00849-x] [Citation(s) in RCA: 82] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 03/22/2022] [Indexed: 05/07/2023]
Abstract
Cellulose nanopaper has shown great potential in diverse fields including optoelectronic devices, food packaging, biomedical application, and so forth, owing to their various advantages such as good flexibility, tunable light transmittance, high thermal stability, low thermal expansion coefficient, and superior mechanical properties. Herein, recent progress on the fabrication and applications of cellulose nanopaper is summarized and discussed based on the analyses of the latest studies. We begin with a brief introduction of the three types of nanocellulose: cellulose nanocrystals, cellulose nanofibrils and bacterial cellulose, recapitulating their differences in preparation and properties. Then, the main preparation methods of cellulose nanopaper including filtration method and casting method as well as the newly developed technology are systematically elaborated and compared. Furthermore, the advanced applications of cellulose nanopaper including energy storage, electronic devices, water treatment, and high-performance packaging materials were highlighted. Finally, the prospects and ongoing challenges of cellulose nanopaper were summarized.
Collapse
Affiliation(s)
- Wei Liu
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
- Sustainable Materials and Chemistry, Department of Wood Technology and Wood-Based Composites, University of Göttingen, 37077, Göttingen, Germany
| | - Kun Liu
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Haishun Du
- Department of Chemical Engineering, Auburn University, Auburn, AL, 36849, USA.
| | - Ting Zheng
- Department of Automotive Engineering, Clemson University, Greenville, SC, 29607, USA
| | - Ning Zhang
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Ting Xu
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China.
| | - Bo Pang
- Sustainable Materials and Chemistry, Department of Wood Technology and Wood-Based Composites, University of Göttingen, 37077, Göttingen, Germany.
| | - Xinyu Zhang
- Department of Chemical Engineering, Auburn University, Auburn, AL, 36849, USA
| | - Chuanling Si
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China.
| | - Kai Zhang
- Sustainable Materials and Chemistry, Department of Wood Technology and Wood-Based Composites, University of Göttingen, 37077, Göttingen, Germany.
| |
Collapse
|
11
|
Cherian RM, Tharayil A, Varghese RT, Antony T, Kargarzadeh H, Chirayil CJ, Thomas S. A review on the emerging applications of nano-cellulose as advanced coatings. Carbohydr Polym 2022; 282:119123. [DOI: 10.1016/j.carbpol.2022.119123] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 01/06/2022] [Accepted: 01/06/2022] [Indexed: 12/26/2022]
|
12
|
Pöhler T, Mautner A, Aguilar-Sanchez A, Hansmann B, Kunnari V, Grönroos A, Rissanen V, Siqueira G, Mathew AP, Tammelin T. Pilot-scale modification of polyethersulfone membrane with a size and charge selective nanocellulose layer. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
13
|
Munier P, Hadi SE, Segad M, Bergström L. Rheo-SAXS study of shear-induced orientation and relaxation of cellulose nanocrystal and montmorillonite nanoplatelet dispersions. SOFT MATTER 2022; 18:390-396. [PMID: 34901987 DOI: 10.1039/d1sm00837d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The development of robust production processes is essential for the introduction of advanced materials based on renewable and Earth-abundant resources. Cellulose nanomaterials have been combined with other highly available nanoparticles, in particular clays, to generate multifunctional films and foams. Here, the structure of dispersions of rod-like cellulose nanocrystals (CNC) and montmorillonite nanoplatelets (MNT) was probed using small-angle X-ray scattering within a rheological cell (Rheo-SAXS). Shear induced a high degree of particle orientation in both the CNC-only and CNC:MNT composite dispersions. Relaxation of the shear-induced orientation in the CNC-only dispersion decayed exponentially and reached a steady-state within 20 seconds, while the relaxation of the CNC:MNT composite dispersion was found to be strongly retarded and partially inhibited. Viscoelastic measurements and Guinier analysis of dispersions at the shear rate of 0.1 s-1 showed that the addition of MNT promotes gel formation of the CNC:MNT composite dispersions. A better understanding of shear-dependent assembly and orientation of multi-component nanoparticle dispersions can be used to process materials with improved mechanical and functional properties.
Collapse
Affiliation(s)
- Pierre Munier
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, 10691, Sweden.
| | - Seyed Ehsan Hadi
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, 10691, Sweden.
- Wallenberg Wood Science Center, Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, 10691, Sweden
| | - Mo Segad
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, 10691, Sweden.
| | - Lennart Bergström
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, 10691, Sweden.
| |
Collapse
|
14
|
Liyanage S, Acharya S, Parajuli P, Shamshina JL, Abidi N. Production and Surface Modification of Cellulose Bioproducts. Polymers (Basel) 2021; 13:3433. [PMID: 34641248 PMCID: PMC8512298 DOI: 10.3390/polym13193433] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 09/29/2021] [Accepted: 10/02/2021] [Indexed: 12/17/2022] Open
Abstract
Petroleum-based synthetic plastics play an important role in our life. As the detrimental health and environmental effects of synthetic plastics continue to increase, the renewable, degradable and recyclable properties of cellulose make subsequent products the "preferred environmentally friendly" alternatives, with a small carbon footprint. Despite the fact that the bioplastic industry is growing rapidly with many innovative discoveries, cellulose-based bioproducts in their natural state face challenges in replacing synthetic plastics. These challenges include scalability issues, high cost of production, and most importantly, limited functionality of cellulosic materials. However, in order for cellulosic materials to be able to compete with synthetic plastics, they must possess properties adequate for the end use and meet performance expectations. In this regard, surface modification of pre-made cellulosic materials preserves the chemical profile of cellulose, its mechanical properties, and biodegradability, while diversifying its possible applications. The review covers numerous techniques for surface functionalization of materials prepared from cellulose such as plasma treatment, surface grafting (including RDRP methods), and chemical vapor and atomic layer deposition techniques. The review also highlights purposeful development of new cellulosic architectures and their utilization, with a specific focus on cellulosic hydrogels, aerogels, beads, membranes, and nanomaterials. The judicious choice of material architecture combined with a specific surface functionalization method will allow us to take full advantage of the polymer's biocompatibility and biodegradability and improve existing and target novel applications of cellulose, such as proteins and antibodies immobilization, enantiomers separation, and composites preparation.
Collapse
Affiliation(s)
| | | | | | | | - Noureddine Abidi
- Fiber and Biopolymer Research Institute, Texas Tech University, Lubbock, TX 79409-5019, USA; (S.L.); (S.A.); (P.P.); (J.L.S.)
| |
Collapse
|
15
|
Tyagi P, Salem KS, Hubbe MA, Pal L. Advances in barrier coatings and film technologies for achieving sustainable packaging of food products – A review. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.06.036] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
16
|
Clarkson CM, El Awad Azrak SM, Forti ES, Schueneman GT, Moon RJ, Youngblood JP. Recent Developments in Cellulose Nanomaterial Composites. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2000718. [PMID: 32696496 DOI: 10.1002/adma.202000718] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 02/26/2020] [Indexed: 06/11/2023]
Abstract
Cellulose nanomaterials (CNMs) are a class of materials that have recently garnered attention in fields as varied as structural materials, biomaterials, rheology modifiers, construction, paper enhancement, and others. As the principal structural reinforcement of biomass giving wood its mechanical properties, CNM is strong and stiff, but also nontoxic, biodegradable, and sustainable with a very large (Gton yr-1 ) source. Unfortunately, due to the relatively young nature of the field and inherent incompatibility of CNM with most man-made materials in use today, research has tended to be more basic-science oriented rather than commercially applicable, so there are few CNM-enabled products on the market today. Herein, efforts are presented for preparing and forming cellulose nanomaterial nanocomposites. The focus is on recent efforts attempting to mitigate common impediments to practical commercialization but is also placed in context with traditional efforts. The work is presented in terms of the progress made, and still to be made, on solving the most pressing challenges-getting properties that are competitive with currently used materials, removing organic solvent, solving the inherent incompatibility between CNM and polymers of interest, and incorporation into commonly used industrial processing techniques.
Collapse
Affiliation(s)
- Caitlyn M Clarkson
- School of Materials Engineering, Purdue University, 701 West Stadium Ave., ARMS, West Lafayette, IN, 47907-2045, USA
| | - Sami M El Awad Azrak
- School of Materials Engineering, Purdue University, 701 West Stadium Ave., ARMS, West Lafayette, IN, 47907-2045, USA
| | - Endrina S Forti
- School of Materials Engineering, Purdue University, 701 West Stadium Ave., ARMS, West Lafayette, IN, 47907-2045, USA
| | - Gregory T Schueneman
- Forest Products Laboratory, United States Forest Service, Madison, WI, 53726, USA
| | - Robert J Moon
- Forest Products Laboratory, United States Forest Service, Madison, WI, 53726, USA
| | - Jeffrey P Youngblood
- School of Materials Engineering, Purdue University, 701 West Stadium Ave., ARMS, West Lafayette, IN, 47907-2045, USA
| |
Collapse
|
17
|
Li K, Clarkson CM, Wang L, Liu Y, Lamm M, Pang Z, Zhou Y, Qian J, Tajvidi M, Gardner DJ, Tekinalp H, Hu L, Li T, Ragauskas AJ, Youngblood JP, Ozcan S. Alignment of Cellulose Nanofibers: Harnessing Nanoscale Properties to Macroscale Benefits. ACS NANO 2021; 15:3646-3673. [PMID: 33599500 DOI: 10.1021/acsnano.0c07613] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
In nature, cellulose nanofibers form hierarchical structures across multiple length scales to achieve high-performance properties and different functionalities. Cellulose nanofibers, which are separated from plants or synthesized biologically, are being extensively investigated and processed into different materials owing to their good properties. The alignment of cellulose nanofibers is reported to significantly influence the performance of cellulose nanofiber-based materials. The alignment of cellulose nanofibers can bridge the nanoscale and macroscale, bringing enhanced nanoscale properties to high-performance macroscale materials. However, compared with extensive reviews on the alignment of cellulose nanocrystals, reviews focusing on cellulose nanofibers are seldom reported, possibly because of the challenge of aligning cellulose nanofibers. In this review, the alignment of cellulose nanofibers, including cellulose nanofibrils and bacterial cellulose, is extensively discussed from different aspects of the driving force, evaluation, strategies, properties, and applications. Future perspectives on challenges and opportunities in cellulose nanofiber alignment are also briefly highlighted.
Collapse
Affiliation(s)
- Kai Li
- Chemical Sciences Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831, United States
| | - Caitlyn M Clarkson
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, United States
| | - Lu Wang
- School of Forest Resources, University of Maine, 5755 Nutting Hall, Orono, Maine 04469, United States
- Advanced Structures and Composites Center, University of Maine, 35 Flagstaff Road, Orono, Maine 04469, United States
| | - Yu Liu
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Meghan Lamm
- Manufacturing Demonstration Facility, Manufacturing Science Division, Oak Ridge National Laboratory, 2350 Cherahala Boulevard, Knoxville, Tennessee 37932, United States
| | - Zhenqian Pang
- Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Yubing Zhou
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Ji Qian
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Mehdi Tajvidi
- School of Forest Resources, University of Maine, 5755 Nutting Hall, Orono, Maine 04469, United States
- Advanced Structures and Composites Center, University of Maine, 35 Flagstaff Road, Orono, Maine 04469, United States
| | - Douglas J Gardner
- School of Forest Resources, University of Maine, 5755 Nutting Hall, Orono, Maine 04469, United States
- Advanced Structures and Composites Center, University of Maine, 35 Flagstaff Road, Orono, Maine 04469, United States
| | - Halil Tekinalp
- Manufacturing Demonstration Facility, Manufacturing Science Division, Oak Ridge National Laboratory, 2350 Cherahala Boulevard, Knoxville, Tennessee 37932, United States
| | - Liangbing Hu
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Teng Li
- Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Arthur J Ragauskas
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
- Department of Forestry, Wildlife, and Fisheries, Center for Renewable Carbon, The University of Tennessee Institute of Agriculture, Knoxville, Tennessee 37996, United States
- UTK-ORNL Joint Institute for Biological Science, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jeffrey P Youngblood
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Soydan Ozcan
- Manufacturing Demonstration Facility, Manufacturing Science Division, Oak Ridge National Laboratory, 2350 Cherahala Boulevard, Knoxville, Tennessee 37932, United States
| |
Collapse
|
18
|
Ahankari SS, Subhedar AR, Bhadauria SS, Dufresne A. Nanocellulose in food packaging: A review. Carbohydr Polym 2020; 255:117479. [PMID: 33436241 DOI: 10.1016/j.carbpol.2020.117479] [Citation(s) in RCA: 104] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 11/27/2020] [Accepted: 11/30/2020] [Indexed: 01/17/2023]
Abstract
The research in eco-friendly and sustainable materials for packaging applications with enhanced barrier, thermo-mechanical, rheological and anti-bacterial properties has accelerated in the last decade. Last decade has witnessed immense interest in employing nanocellulose (NC) as a sustainable and biodegradable alternative to the current synthetic packaging barrier films. This review article gathers the research information on NC as a choice for food packaging material. It reviews on the employment of NC and its various forms including its chemico-physical treatments into bio/polymers and its impact on the performance of nanocomposites for food packaging application. The review reveals the fact that the research trends towards NC based materials are quite promising for Active Packaging (AP) applications, including the Controlled Release Packaging (CRP) and Responsive Packaging (RP). Finally, it summarizes with the challenges of sustainable packaging, gray areas that need an improvement/focus in order to commercially exploit this wonderful material for packaging application.
Collapse
Affiliation(s)
- Sandeep S Ahankari
- School of Mechanical Engineering, VIT University, Vellore, TN, 632014, India.
| | - Aditya R Subhedar
- School of Mechanical Engineering, VIT University, Vellore, TN, 632014, India
| | - Swarnim S Bhadauria
- School of Mechanical Engineering, VIT University, Vellore, TN, 632014, India
| | - Alain Dufresne
- University Grenoble Alpes, CNRS, Grenoble INP, LGP2, F-38000, Grenoble, France
| |
Collapse
|
19
|
Yadav C, Saini A, Zhang W, You X, Chauhan I, Mohanty P, Li X. Plant-based nanocellulose: A review of routine and recent preparation methods with current progress in its applications as rheology modifier and 3D bioprinting. Int J Biol Macromol 2020; 166:1586-1616. [PMID: 33186649 DOI: 10.1016/j.ijbiomac.2020.11.038] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 10/20/2020] [Accepted: 11/06/2020] [Indexed: 02/07/2023]
Abstract
"Nanocellulose" have captivated the topical sphere of sturdily escalating market for sustainable materials. The review focuses on the comprehensive understanding of the distinct surface chemistry and functionalities pertaining to the renovation of macro-cellulose at nanodimensional scale to provide an intuition of their processing-structure-function prospective. The abundant availability, cost effectiveness and diverse properties associated with plant-based resources have great economical perspective for developing sustainable cellulose nanomaterials. Hence, emphasis has been given on nanocellulose types obtained from plant-based sources. An overarching goal is to provide the recent advancement in the preparation routes of nanocellulose. Considering the excellent shear thinning/thixotropic/gel-like behavior, the review provids an assemblage of publications specifically dealing with its application as rheology modifier with emphasis on its use as bioink for 3D bioprinting for various biomedical applications. Altogether, this review has been oriented in a way to collocate a collective data starting from the historical perspective of cellulose discovery to modern cellulosic chemistry and its renovation as nanocellulose with recent technological hype for broad spanning applications.
Collapse
Affiliation(s)
- Chandravati Yadav
- Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, Shaanxi 710021, PR China.
| | - Arun Saini
- Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, Shaanxi 710021, PR China
| | - Wenbo Zhang
- Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry & Technology, Shaanxi University of Science & Technology, Xi'an, Shaanxi 710021, PR China
| | - Xiangyu You
- Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, Shaanxi 710021, PR China
| | - Indu Chauhan
- Department of Biotechnology, Dr B. R. Ambedkar National Institute of Technology, Jalandhar 144011, Punjab, India
| | - Paritosh Mohanty
- Functional Materials Laboratory, Department of Chemistry, IIT Roorkee, Roorkee 247667, Uttarakhand, India
| | - Xinping Li
- Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, Shaanxi 710021, PR China.
| |
Collapse
|
20
|
Zhu Z, Fu S, Lavoine N, Lucia LA. Structural reconstruction strategies for the design of cellulose nanomaterials and aligned wood cellulose-based functional materials – A review. Carbohydr Polym 2020; 247:116722. [DOI: 10.1016/j.carbpol.2020.116722] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/30/2020] [Accepted: 06/30/2020] [Indexed: 11/29/2022]
|
21
|
Silva FAGS, Dourado F, Gama M, Poças F. Nanocellulose Bio-Based Composites for Food Packaging. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2041. [PMID: 33081126 PMCID: PMC7602726 DOI: 10.3390/nano10102041] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 10/04/2020] [Accepted: 10/12/2020] [Indexed: 02/07/2023]
Abstract
The food industry is increasingly demanding advanced and eco-friendly sustainable packaging materials with improved physical, mechanical and barrier properties. The currently used materials are synthetic and non-degradable, therefore raising environmental concerns. Consequently, research efforts have been made in recent years towards the development of bio-based sustainable packaging materials. In this review, the potential of nanocelluloses as nanofillers or as coatings for the development of bio-based nanocomposites is discussed, namely: (i) the physico-chemical interaction of nanocellulose with the adjacent polymeric phase, (ii) the effect of nanocellulose modification/functionalization on the final properties of the composites, (iii) the production methods for such composites, and (iv) the effect of nanocellulose on the overall migration, toxicity, and the potential risk to human health. Lastly, the technology readiness level of nanocellulose and nanocellulose based composites for the market of food packaging is discussed.
Collapse
Affiliation(s)
- Francisco A. G. S. Silva
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; (F.A.G.S.S.); (F.D.)
| | - Fernando Dourado
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; (F.A.G.S.S.); (F.D.)
| | - Miguel Gama
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; (F.A.G.S.S.); (F.D.)
| | - Fátima Poças
- Escola Superior de Biotecnologia, Laboratório Associado, CBQF–Centro de Biotecnologia e Química Fina, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal;
| |
Collapse
|
22
|
Tan P, Diao S, Huang T, Yang Z, Zhou H, Zhang Y. Mechanism and Control of the Trailing Edge in Intermittent Slot Die Coating. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c02743] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Penghui Tan
- State Key Laboratory of Material Processing and Die & Mold Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
| | - Simian Diao
- Yejiawei Technology Co. Ltd., Shenzhen 518172, Guangdong, China
| | - Tianlun Huang
- State Key Laboratory of Material Processing and Die & Mold Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
| | - Zhiming Yang
- Xinyuren Technology Co. Ltd., Shenzhen 518172, Guangdong, China
| | - Huamin Zhou
- State Key Laboratory of Material Processing and Die & Mold Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
| | - Yun Zhang
- State Key Laboratory of Material Processing and Die & Mold Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
- Xinyuren Technology Co. Ltd., Shenzhen 518172, Guangdong, China
| |
Collapse
|
23
|
Liu H, Liu K, Han X, Xie H, Si C, Liu W, Bae Y. Cellulose Nanofibrils-based Hydrogels for Biomedical Applications: Progresses and Challenges. Curr Med Chem 2020; 27:4622-4646. [DOI: 10.2174/0929867327666200303102859] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 12/15/2019] [Accepted: 12/25/2019] [Indexed: 02/06/2023]
Abstract
Background:
Cellulose Nanofibrils (CNFs) are natural nanomaterials with nanometer
dimensions. Compared with ordinary cellulose, CNFs own good mechanical properties, large specific
surface areas, high Young's modulus, strong hydrophilicity and other distinguishing characteristics,
which make them widely used in many fields. This review aims to introduce the preparation
of CNFs-based hydrogels and their recent biomedical application advances.
Methods:
By searching the recent literatures, we have summarized the preparation methods of
CNFs, including mechanical methods and chemical mechanical methods, and also introduced the
fabrication methods of CNFs-based hydrogels, including CNFs cross-linked with metal ion and
with polymers. In addition, we have summarized the biomedical applications of CNFs-based hydrogels,
including scaffold materials and wound dressings.
Results:
CNFs-based hydrogels are new types of materials that are non-toxic and display a certain
mechanical strength. In the tissue scaffold application, they can provide a micro-environment for
the damaged tissue to repair and regenerate it. In wound dressing applications, it can fit the wound
surface and protect the wound from the external environment, thereby effectively promoting the
healing of skin tissue.
Conclusion:
By summarizing the preparation and application of CNFs-based hydrogels, we have
analyzed and forecasted their development trends. At present, the research of CNFs-based hydrogels
is still in the laboratory stage. It needs further exploration to be applied in practice. The development
of medical hydrogels with high mechanical properties and biocompatibility still poses significant
challenges.
Collapse
Affiliation(s)
- Huayu Liu
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Kun Liu
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Xiao Han
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Hongxiang Xie
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Chuanling Si
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Wei Liu
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Youngsoo Bae
- Jiangxi Academy of Forestry, Nanchang 33032, China
| |
Collapse
|
24
|
Koppolu R, Blomquist N, Dahlström C, Toivakka M. High-Throughput Processing of Nanographite–Nanocellulose-Based Electrodes for Flexible Energy Devices. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c01112] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rajesh Koppolu
- Laboratory of Natural Materials Technology, Åbo Akademi University, 20500 Turku, Finland
| | - Nicklas Blomquist
- Department of Natural Sciences, Mid Sweden University, SE-851 70 Sundsvall, Sweden
| | - Christina Dahlström
- Department of Chemical Engineering, Mid Sweden University, SE-851 70 Sundsvall, Sweden
| | - Martti Toivakka
- Laboratory of Natural Materials Technology, Åbo Akademi University, 20500 Turku, Finland
| |
Collapse
|
25
|
Paper-Based Oil Barrier Packaging using Lignin-Containing Cellulose Nanofibrils. Molecules 2020; 25:molecules25061344. [PMID: 32188070 PMCID: PMC7146371 DOI: 10.3390/molecules25061344] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 03/05/2020] [Accepted: 03/06/2020] [Indexed: 01/16/2023] Open
Abstract
Environmental and health concerns are driving the need for new materials in food packaging to replace poly- or perfluorinated compounds, aluminum layers, and petroleum-based polymers. Cellulose nanofibrils (CNF) have been shown by a number of groups to form excellent barrier layers to oxygen and grease. However, the influence of lignin-containing cellulose nanofibrils (LCNF) on film barrier properties has not been well reported. Herein, thin films (16 g/m2) from LCNF and CNF were formed on paper substrates through a filtration technique that should mimic the addition of material at the wet end of a paper machine. Surface, barrier and mechanical attributes of these samples were characterized. The analysis on the surface free energy and water contact angle pointed to the positive role of lignin distribution in inducing a certain degree of water repellency. The observed oxygen transmission rate (OTR) and water vapor permeability (WVP) values of LCNF-coated samples were nearly similar to those with CNF. However, the presence of lignin improved the oil proof performance; these layered designs exhibited an excellent resistance to grease (kit No. 12). The attained papers with LCNF coat were formed into bowl-like containers using metal molds and a facile oven drying protocol to evaluate their resistance to oil penetration over a longer period. The results confirmed the capability of LCNF layer in holding commercially available cooking oils with no evidence of leakage for over five months. Also, an improvement in the tensile strength and elongation at break was observed in the studied papers. Overall, the proposed packaging material possesses viable architecture and can be considered as a fully wood-based alternative for the current fluorocarbon systems.
Collapse
|
26
|
Wang L, Chen C, Wang J, Gardner DJ, Tajvidi M. Cellulose nanofibrils versus cellulose nanocrystals: Comparison of performance in flexible multilayer films for packaging applications. Food Packag Shelf Life 2020. [DOI: 10.1016/j.fpsl.2020.100464] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
27
|
Stimuli induced cellulose nanomaterials alignment and its emerging applications: A review. Carbohydr Polym 2020; 230:115609. [DOI: 10.1016/j.carbpol.2019.115609] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 11/07/2019] [Accepted: 11/10/2019] [Indexed: 02/03/2023]
|
28
|
High shear capillary rheometry of cellulose nanocrystals for industrially relevant processing. Carbohydr Polym 2019; 231:115735. [PMID: 31888852 DOI: 10.1016/j.carbpol.2019.115735] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 12/10/2019] [Accepted: 12/11/2019] [Indexed: 11/24/2022]
Abstract
A microcapillary rheometer was employed to study the rheological characteristics of CNCs at temperatures between 15 °C and 50 °C and aqueous concentrations between 1.5 wt% and 12.1 wt%, at rates up to 8 × 105 s-1. Time-temperature and time-concentration superposition were applied to analyze the data. A master curve of shear rate sweeps at temperatures between 15 °C and 50 °C was successfully generated to a reference temperature of 25 °C with the shift factor plot suggesting an Arrhenius relationship over the entire measured temperature range. Concentration-dependent data indicate a high shear Newtonian plateau at the limit of low concentration. Repeated testing of the same sample volume was implemented to represent extended times at elevated stress, with repeated experiments leading to a permanent decrease in viscosity. Atomic force microscopy (AFM) suggests sensitivity of the CNC geometry to moderate stress in a flow field.
Collapse
|
29
|
Affiliation(s)
- Bruno Frka-Petesic
- Department of Chemistry, University of Cambridge Lensfield Road, Cambridge CB2 1EW, UK
| | - Silvia Vignolini
- Department of Chemistry, University of Cambridge Lensfield Road, Cambridge CB2 1EW, UK
| |
Collapse
|
30
|
Koppolu R, Lahti J, Abitbol T, Swerin A, Kuusipalo J, Toivakka M. Continuous Processing of Nanocellulose and Polylactic Acid into Multilayer Barrier Coatings. ACS APPLIED MATERIALS & INTERFACES 2019; 11:11920-11927. [PMID: 30829474 DOI: 10.1021/acsami.9b00922/asset/images/large/am-2019-00922c_0005.jpeg] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Recent years have seen an increased interest toward utilizing biobased and biodegradable materials for barrier packaging applications. Most of the abovementioned materials usually have certain shortcomings that discourage their adoption as a preferred material of choice. Nanocellulose falls into such a category. It has excellent barrier against grease, mineral oils, and oxygen but poor tolerance against water vapor, which makes it unsuitable to be used at high humidity. In addition, nanocellulose suspensions' high viscosity and yield stress already at low solid content and poor adhesion to substrates create additional challenges for high-speed processing. Polylactic acid (PLA) is another potential candidate that has reasonably high tolerance against water vapor but rather a poor barrier against oxygen. The current work explores the possibility of combining both these materials into thin multilayer coatings onto a paperboard. A custom-built slot-die was used to coat either microfibrillated cellulose or cellulose nanocrystals onto a pigment-coated baseboard in a continuous process. These were subsequently coated with PLA using a pilot-scale extrusion coater. Low-density polyethylene was used as for reference extrusion coating. Cationic starch precoating and corona treatment improved the adhesion at nanocellulose/baseboard and nanocellulose/PLA interfaces, respectively. The water vapor transmission rate for nanocellulose + PLA coatings remained lower than that of the control PLA coating, even at a high relative humidity of 90% (38 °C). The multilayer coating had 98% lower oxygen transmission rate compared to just the PLA-coated baseboard, and the heptane vapor transmission rate reduced by 99% in comparison to the baseboard. The grease barrier for nanocellulose + PLA coatings increased 5-fold compared to nanocellulose alone and 2-fold compared to PLA alone. This approach of processing nanocellulose and PLA into multiple layers utilizing slot-die and extrusion coating in tandem has the potential to produce a barrier packaging paper that is both 100% biobased and biodegradable.
Collapse
Affiliation(s)
- Rajesh Koppolu
- Laboratory of Paper Coating and Converting, Center for Functional Materials , Åbo Akademi University , 20500 Turku , Finland
| | - Johanna Lahti
- Paper Converting and Packaging , Tampere University of Technology , 33100 Tampere , Finland
| | - Tiffany Abitbol
- Bioeconomy-Biorefinery and Energy , RISE Research Institutes of Sweden , 114 28 Stockholm , Sweden
| | - Agne Swerin
- Division of Surface and Corrosion Science, School of Engineering Sciences in Chemistry, Biotechnology and Health , KTH Royal Institute of Technology , 100 44 Stockholm , Sweden
| | - Jurkka Kuusipalo
- Paper Converting and Packaging , Tampere University of Technology , 33100 Tampere , Finland
| | - Martti Toivakka
- Laboratory of Paper Coating and Converting, Center for Functional Materials , Åbo Akademi University , 20500 Turku , Finland
| |
Collapse
|
31
|
Koppolu R, Lahti J, Abitbol T, Swerin A, Kuusipalo J, Toivakka M. Continuous Processing of Nanocellulose and Polylactic Acid into Multilayer Barrier Coatings. ACS APPLIED MATERIALS & INTERFACES 2019; 11:11920-11927. [PMID: 30829474 PMCID: PMC6727189 DOI: 10.1021/acsami.9b00922] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 03/04/2019] [Indexed: 05/14/2023]
Abstract
Recent years have seen an increased interest toward utilizing biobased and biodegradable materials for barrier packaging applications. Most of the abovementioned materials usually have certain shortcomings that discourage their adoption as a preferred material of choice. Nanocellulose falls into such a category. It has excellent barrier against grease, mineral oils, and oxygen but poor tolerance against water vapor, which makes it unsuitable to be used at high humidity. In addition, nanocellulose suspensions' high viscosity and yield stress already at low solid content and poor adhesion to substrates create additional challenges for high-speed processing. Polylactic acid (PLA) is another potential candidate that has reasonably high tolerance against water vapor but rather a poor barrier against oxygen. The current work explores the possibility of combining both these materials into thin multilayer coatings onto a paperboard. A custom-built slot-die was used to coat either microfibrillated cellulose or cellulose nanocrystals onto a pigment-coated baseboard in a continuous process. These were subsequently coated with PLA using a pilot-scale extrusion coater. Low-density polyethylene was used as for reference extrusion coating. Cationic starch precoating and corona treatment improved the adhesion at nanocellulose/baseboard and nanocellulose/PLA interfaces, respectively. The water vapor transmission rate for nanocellulose + PLA coatings remained lower than that of the control PLA coating, even at a high relative humidity of 90% (38 °C). The multilayer coating had 98% lower oxygen transmission rate compared to just the PLA-coated baseboard, and the heptane vapor transmission rate reduced by 99% in comparison to the baseboard. The grease barrier for nanocellulose + PLA coatings increased 5-fold compared to nanocellulose alone and 2-fold compared to PLA alone. This approach of processing nanocellulose and PLA into multiple layers utilizing slot-die and extrusion coating in tandem has the potential to produce a barrier packaging paper that is both 100% biobased and biodegradable.
Collapse
Affiliation(s)
- Rajesh Koppolu
- Laboratory
of Paper Coating and Converting, Center for Functional Materials, Åbo Akademi University, 20500 Turku, Finland
| | - Johanna Lahti
- Paper
Converting and Packaging, Tampere University
of Technology, 33100 Tampere, Finland
| | - Tiffany Abitbol
- Bioeconomy—Biorefinery
and Energy, RISE Research Institutes of
Sweden, 114 28 Stockholm, Sweden
| | - Agne Swerin
- Division
of Surface and Corrosion Science, School of Engineering Sciences in
Chemistry, Biotechnology and Health, KTH
Royal Institute of Technology, 100 44 Stockholm, Sweden
| | - Jurkka Kuusipalo
- Paper
Converting and Packaging, Tampere University
of Technology, 33100 Tampere, Finland
| | - Martti Toivakka
- Laboratory
of Paper Coating and Converting, Center for Functional Materials, Åbo Akademi University, 20500 Turku, Finland
| |
Collapse
|
32
|
Oguzlu H, Jiang F. Nanopolysaccharides in Surface Coating. SPRINGER SERIES IN BIOMATERIALS SCIENCE AND ENGINEERING 2019. [DOI: 10.1007/978-981-15-0913-1_8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
33
|
Hosseini SF, Gómez-Guillén MC. A state-of-the-art review on the elaboration of fish gelatin as bioactive packaging: Special emphasis on nanotechnology-based approaches. Trends Food Sci Technol 2018. [DOI: 10.1016/j.tifs.2018.07.022] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
34
|
Tarrés Q, Oliver-Ortega H, Alcalà M, Merayo N, Balea A, Blanco Á, Mutjé P, Delgado-Aguilar M. Combined effect of sodium carboxymethyl cellulose, cellulose nanofibers and drainage aids in recycled paper production process. Carbohydr Polym 2018; 183:201-206. [DOI: 10.1016/j.carbpol.2017.12.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 11/17/2017] [Accepted: 12/12/2017] [Indexed: 10/18/2022]
|
35
|
Oh K, Lee JH, Im W, Rajabi Abhari A, Lee HL. Role of Cellulose Nanofibrils in Structure Formation of Pigment Coating Layers. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b02750] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kyudeok Oh
- Department
of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Korea
- Research Institute of Agriculture and Life Sciences, Seoul 151-921, Korea
| | - Jee-Hong Lee
- Department
of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Korea
| | - Wanhee Im
- Department
of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Korea
| | - Araz Rajabi Abhari
- Department
of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Korea
| | - Hak Lae Lee
- Department
of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Korea
- Research Institute of Agriculture and Life Sciences, Seoul 151-921, Korea
| |
Collapse
|
36
|
Leppiniemi J, Lahtinen P, Paajanen A, Mahlberg R, Metsä-Kortelainen S, Pinomaa T, Pajari H, Vikholm-Lundin I, Pursula P, Hytönen VP. 3D-Printable Bioactivated Nanocellulose-Alginate Hydrogels. ACS APPLIED MATERIALS & INTERFACES 2017; 9:21959-21970. [PMID: 28598154 DOI: 10.1021/acsami.7b02756] [Citation(s) in RCA: 171] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We describe herein a nanocellulose-alginate hydrogel suitable for 3D printing. The composition of the hydrogel was optimized based on material characterization methods and 3D printing experiments, and its behavior during the printing process was studied using computational fluid dynamics simulations. The hydrogel was biofunctionalized by the covalent coupling of an enhanced avidin protein to the cellulose nanofibrils. Ionic cross-linking of the hydrogel using calcium ions improved the performance of the material. The resulting hydrogel is suitable for 3D printing, its mechanical properties indicate good tissue compatibility, and the hydrogel absorbs water in moist conditions, suggesting potential in applications such as wound dressings. The biofunctionalization potential was shown by attaching a biotinylated fluorescent protein and a biotinylated fluorescent small molecule via avidin and monitoring the material using confocal microscopy. The 3D-printable bioactivated nanocellulose-alginate hydrogel offers a platform for the development of biomedical devices, wearable sensors, and drug-releasing materials.
Collapse
Affiliation(s)
- Jenni Leppiniemi
- Faculty of Medicine and Life Sciences and BioMediTech, University of Tampere , Lääkärinkatu 1, 33520 Tampere, Finland
- Fimlab Laboratories , Biokatu 4, 33520 Tampere, Finland
| | - Panu Lahtinen
- VTT Technical Research Centre of Finland Ltd , P.O. Box 1000, 02044 VTT, Finland
| | - Antti Paajanen
- VTT Technical Research Centre of Finland Ltd , P.O. Box 1000, 02044 VTT, Finland
| | - Riitta Mahlberg
- VTT Technical Research Centre of Finland Ltd , P.O. Box 1000, 02044 VTT, Finland
| | | | - Tatu Pinomaa
- VTT Technical Research Centre of Finland Ltd , P.O. Box 1000, 02044 VTT, Finland
| | - Heikki Pajari
- VTT Technical Research Centre of Finland Ltd , P.O. Box 1000, 02044 VTT, Finland
| | - Inger Vikholm-Lundin
- Faculty of Medicine and Life Sciences and BioMediTech, University of Tampere , Lääkärinkatu 1, 33520 Tampere, Finland
- Fimlab Laboratories , Biokatu 4, 33520 Tampere, Finland
| | - Pekka Pursula
- VTT Technical Research Centre of Finland Ltd , P.O. Box 1000, 02044 VTT, Finland
| | - Vesa P Hytönen
- Faculty of Medicine and Life Sciences and BioMediTech, University of Tampere , Lääkärinkatu 1, 33520 Tampere, Finland
- Fimlab Laboratories , Biokatu 4, 33520 Tampere, Finland
| |
Collapse
|