Article
Chemistry, Applied
Ana F. Lourenco, Daniela Martins, Fernando Dourado, Pedro Sarmento, Paulo J. T. Ferreira, Jose A. F. Gamelas
Summary: This study found that mechanically treated bacterial nanocellulose (BNC) can improve the mechanical, optical, and structural properties of paper without affecting filler retention. However, the improvement in paper strength was only slight. Additionally, coating the paper surface with BNC can significantly enhance printing quality.
CARBOHYDRATE POLYMERS
(2023)
Article
Chemistry, Applied
Ursula Fillat, Priscilla Vergara, Juan Carlos Villar, Nuria Gomez
Summary: This study evaluates the impact of cellulose nanofibres (CNFs) on the barrier properties of commercial paper and finds that CNFs coatings can improve the quality and air permeability of cardboard packaging. The results show that T-CNFs and c-CNFs coatings exhibit good coverage on the paper with low air permeance values, making them potential coating materials for paper packaging.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Engineering, Multidisciplinary
Sungjun Hwang, Yousoo Han, Douglas J. Gardner
Summary: Bleached Kraft pulp, unbleached Kraft pulp, and old corrugated cardboard pulp are suitable for producing cellulose nanofibril suspensions. Spray drying is a fast, simple, cost-effective, and scalable drying method. Spray-dried cellulose nanofibrils can be used as reinforcing materials in polypropylene matrices. The particle size of cellulose nanofibrils affects the material properties.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Chemistry, Applied
Haishun Du, Mahesh Parit, Kun Liu, Miaomiao Zhang, Zhihua Jiang, Tung-Shi Huang, Xinyu Zhang, Chuanling Si
Summary: This study demonstrated a simple and efficient method to functionalize cellulose nanopaper with water resistance, high transparency, excellent antibacterial, and barrier properties, expanding its potential applications. By impregnating chitosan and conducting halogenation, the functionalized CNP showed significant enhancements in strength, transmittance, optical haze, and antibacterial performance.
CARBOHYDRATE POLYMERS
(2021)
Article
Materials Science, Multidisciplinary
Gengye Lin, Jun Xu, Minghong Wu, Qianqian Sun, Shiyun Zhu, Bin Wang, Wei Zhang
Summary: Cellulose-based materials offer a promising alternative to non-biodegradable plastics in packaging applications due to their biodegradability and abundance. The study focuses on improving the barrier properties of cellulose-based materials by incorporating talc platelets into a cellulose nanofibril matrix. The fabricated CNF-talc composite films demonstrated improved oxygen and water vapor barrier properties, as well as excellent UV blocking and thermal stability. The prepared CNF-based films also exhibited excellent biodegradability compared to conventional plastic films.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Gengye Lin, Jun Xu, Minghong Wu, Qianqian Sun, Shiyun Zhu, Bin Wang, Wei Zhang
Summary: Cellulose-based materials have been considered as a promising alternative to non-biodegradable plastics in packaging applications. In this study, a hierarchical structure was constructed by incorporating talc platelets into a cellulose nanofibril matrix, resulting in cellulose nanofibril-talc composite films with improved barrier properties against oxygen and water vapor. The composite films also exhibited excellent UV blocking and thermal stability, while maintaining good biodegradability.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Sungjun Hwang, Colleen C. Walker, Donna Johnson, Yousoo Han, Douglas J. Gardner
Summary: Enzyme-treated cellulose nanofibrils (CNFs) were prepared and spray-dried to investigate their effect on the mechanical properties of composites. The results showed that adding enzyme-treated SDCNFs enhanced the strength of PP and maintained the strength properties.
Article
Chemistry, Applied
Yi Zheng, Hale Oguzlu, Alberto Baldelli, Yeling Zhu, Mingyao Song, Anubhav Pratap-Singh, Feng Jiang
Summary: In this study, cellulose nanofibrils (CNFs) were used as emulsifiers to stabilize paraffin Pickering emulsion by ultrasonication, resulting in a uniform PCM emulsion. The CNF-stabilized paraffin emulsion exhibited excellent stability and high thermal stability after long-term storage and multiple heating-cooling cycles.
CARBOHYDRATE POLYMERS
(2022)
Article
Biochemistry & Molecular Biology
Darrel Sarvesh Naidu, Maya Jacob John
Summary: In this study, cellulose nanofibrils (CNFs) were incorporated into xylan-alginate films to enhance mechanical and barrier properties for food packaging applications. The CNFs had fiber diameters between 10 and 80 nm and formed a highly entangled web-like structure. The incorporation of CNFs into the xylan-alginate matrix increased tensile strength and Young's modulus of the films, while improving water vapor permeability without significant impact on thermal properties.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Nanoscience & Nanotechnology
Qing Chen, Calvin J. Brett, Andrei Chumakov, Marc Gensch, Matthias Schwartzkopf, Volker Koerstgens, L. Daniel Soderberg, Anton Plech, Peng Zhang, Peter Mueller-Buschbaum, Stephan Roth
Summary: The study demonstrates the fabrication of AgNP/CNF thin films through layer-by-layer spray-coating method, showing a more uniform distribution and higher surface hydrophilicity compared to SiO2 substrates. This approach provides a convenient and scalable platform for producing AgNP/CNF films with low agglomeration rate.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Paper & Wood
Arif Ozcan, Ayhan Tozluoglu, Emine Arman Kandirmaz, Ahmet Tutus, Hakan Fidan
Summary: By improving the paper surface with CNF/CNF-OX coating, better printability properties can be achieved. The study found that papers coated with CNF/CNF-OX have smoother surfaces and perform better in terms of both gloss properties and printability.
Article
Agricultural Engineering
Carine Setter, Adriano Reis Prazeres Mascarenhas, Matheus Cordazzo Dias, Ana Cristina Freitas de Oliveira Meira, Nayara Tamires da Silva Carvalho, Mario Sergio Lorenco, Maria Alice Martins, Gustavo Henrique Denzin Tonoli, Tiago Jose Pires de Oliveira
Summary: This study examined the impact of adding cationic surfactant CTAB to cellulose nanofibril suspensions on the efficiency of the spray drying process and the properties of the dried microparticles. The results showed that pretreating and modifying the CNF with surfactant led to higher drying yields and smaller particle sizes. The spray-dried material exhibited higher crystalline fraction and thermostability, making it suitable for composites. The addition of surfactant also enhanced water stability and offered potential cost reduction and commercialization prospects.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Polymer Science
Noverra Mardhatillah Nizardo, Noor Athifah Dzahyrah Sugandi, Aniek Sri Handayani
Summary: This study investigated the effect of CMC on PVA/CMC/CNF nanocomposites and found that the addition of CMC can effectively improve their physical and tensile properties, as well as the barrier properties and tear strength of the coated paper.
POLYMER-PLASTICS TECHNOLOGY AND MATERIALS
(2023)
Article
Materials Science, Ceramics
Mackenzie Ridley, Eugenio Garcia, Kenneth Kane, Sanjay Sampath, Bruce Pint
Summary: Environmental barrier coatings for SiC/SiC composites are limited by the melting temperature of the Si bond coating near 1414 degrees C. Systems without a bond coating may be required for future turbine applications where material temperatures go beyond 1350 degrees C. Enhanced roughness SiC substrates were developed to assess coating adhesion without the bond coating. Two EBCs with different YbMS/YbDS ratios were produced via modified plasma spraying parameters. Coating microstructure, thermal expansion, and modulus were measured for comparison of coating properties. Cyclic steam exposures at 1350 degrees C were performed to assess oxidation resistance. The EBC with increased concentration of Yb2SiO5 secondary phase displayed a higher CTE, which is typically expected to decrease adhesion lifetimes due to an increase in stress upon thermal cycling. Yet, the EBC chemistry with increased Yb2SiO5 concentration was able to experience longer cycling times prior to coating delamination, likely due to interface interactions with the substrate and the thermally grown oxide.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Biochemistry & Molecular Biology
Farid Torabizadeh, Milad Fadaie, Esmaeil Mirzaei, Shaghayegh Sadeghi, Gholam-Reza Nejabat
Summary: This study compared the physical properties and cellular performance of physically cross-linked collagen hydrogel reinforced with cellulose nanocrystals (CNCs) and cellulose nanofibrils (CNFs). The results showed that the addition of nanofillers improved the mechanical properties of the hydrogel and had different effects on cell viability and morphology.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Engineering, Chemical
Marina S. Azeredo, Mario A. B. S. Nunes, Lucas R. F. Figueiredo, Juliano E. Oliveira, Gustavo D. Tonoli, Silvio de Barros, Eliton S. Medeiros
Summary: The biodegradable, renewable, and environmentally friendly glycerol-based wood adhesives were synthesized through polycondensation reaction involving dicarboxylic acids and glycerol. The thermal properties of the synthesized polymers were evaluated after cross-linking, showing that the presence of citric acid in the polymer improves adhesion and reduces adhesive flexibility. This research opens up new possibilities for utilizing glycerol as a by-product of biodiesel production to produce tailor-made adhesives.
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Barbara Maria Ribeiro Guimaraes, Mario Vanoli Scatolino, Maria Alice Martins, Saulo Rocha Ferreira, Lourival Marin Mendes, Jose Tarcisio Lima, Mario Guimaraes Junior, Gustavo Henrique Denzin Tonoli
Summary: This study demonstrated the production of bio-based films/nanopapers using cellulose nanofibrils (CNFs) from banana tree pseudostem (BTPT) wastes and Eucalyptus kraft cellulose (EKC), showing attractive mechanical properties and biodegradability. Increasing the number of fibrillation cycles resulted in more transparent films with significant reduction in water absorption.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Materials Science, Textiles
Livia Ribeiro Costa, Luiz Eduardo Silva, Lays Camila Matos, Gustavo Henrique Denzin Tonoli, Paulo Ricardo Gherardi Hein
Summary: The study aimed to enhance the physical and mechanical properties of paper by adding cellulose nanofibrils (CNF) as reinforcement. Results showed that incorporating 10% CNF led to denser, more compact, and air-tight paper with improved mechanical performance compared to control samples. The findings highlight the potential of CNF as additives in papermaking process to boost paper properties.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Construction & Building Technology
Leticia Oliveira de Souza, Matheus Cordazzo, Lourdes Maria Silva de Souza, Gustavo Tonoli, Flavio de Andrade Silva, Viktor Mechtcherine
Summary: The study aimed to find a suitable methodology for dispersing and mixing microcrystalline cellulose (MCC) and nano-fibrillated cellulose (NFC) into cement pastes. Ultrasonication and superplasticizer were identified as the most suitable methods for MCC and NFC respectively, resulting in significant improvements in strength and flexural modulus at optimal fiber content.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Chemistry, Applied
Camily Aparecida Reis, Mario Guimaraes Junior, Francys Kley Vieira Moreira, Jose Manoel Marconcini, Livia Elisabeth Vasconcellos de Siqueira Brandao Vaz
Summary: Edible coatings, especially those made of chitosan/montmorillonite nanocomposites, have the potential to improve the shelf life of fruits by reducing water permeability, enhancing mechanical properties, and providing antimicrobial effects.
FOOD SCIENCE AND TECHNOLOGY INTERNATIONAL
(2023)
Article
Materials Science, Paper & Wood
Thiago Moreira Cruz, Adriano Reis Prazeres Mascarenhas, Mario Vanoli Scatolino, Douglas Lamounier Faria, Lays Camila Matos, Paulo Junio Duarte, Joao Moreira Neto, Lourival Marin Mendes, Gustavo Henrique Denzin Tonoli
Summary: The accumulation of petroleum polymers has negative impacts on biodiversity and the environment. The use of nanocellulose can enhance biodegradability and improve the physical-mechanical performance of materials. This study aimed to produce and characterize hybrid films made of bacterial cellulose and plant nanocellulose, and evaluate their properties.
NORDIC PULP & PAPER RESEARCH JOURNAL
(2022)
Article
Construction & Building Technology
Joabel Raabe, Danillo Wisky Silva, Claudio Henrique Soares Del Menezzi, Gustavo Henrique Denzin Tonoli
Summary: The study examined the impact of modified and unmodified cellulose pulp fibers on the properties of fiber-cement composites. Modified fibers showed improved compressive strength and reduced density, yet these properties decreased with higher fiber content.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Environmental Sciences
Mario Vanoli Scatolino, Lina Bufalino, Matheus Cordazzo Dias, Lourival Marin Mendes, Mateus Souza da Silva, Gustavo Henrique Denzin Tonoli, Tiago Marcolino de Souza, Francisco Tarcisio Alves Junior
Summary: By functionalizing cellulose nanofibrils (CNFs), films with potential for packaging can be produced, which have low permeability and high mechanical strength. Bio-based nanomaterials have the potential for applications in packaging, allowing efficient utilization of forest waste.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Matheus Cordazzo Dias, Mohamed Naceur Belgacem, Jaime Vilela De Resende, Maria Alice Martins, Renato Augusto Pereira Damasio, Gustavo Henrique Denzin Tonoli, Saulo Rocha Ferreira
Summary: Lignin-cellulose nanofibrils (LCNF) have attracted increasing interest due to their ability to maintain lignin in nanomaterial composition. This study demonstrates that a combined enzymatic pretreatment of laccase and endoglucanase can effectively improve the quality of LCNF and save energy.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Materials Science, Paper & Wood
Adriano Reis Prazeres Mascarenhas, Mario Vanoli Scatolino, Allan de Amorim dos Santos, Lais Bruno Norcino, Paulo Junio Duarte, Rafael Rodolfo de Melo, Matheus Cordazzo Dias, Caik Elisio Tonelli de Faria, Maressa Carvalho Mendonca, Gustavo Henrique Denzin Tonoli
Summary: This study evaluated the influence of cellulose micro/nanofibrils (MFC/NFC) on the properties of hydroxypropyl methylcellulose (HPMC) films. The results showed that adding more than 50% MFC/NFC significantly improved the physical, barrier, and mechanical properties of the films, as well as reduced degradation in water.
NORDIC PULP & PAPER RESEARCH JOURNAL
(2022)
Article
Environmental Sciences
Lucas Oliveira Souza, Ingrid Alves Santos, Iasnaia Maria de Carvalho Tavares, Igor Carvalho Fontes Sampaio, Matheus Cordazzo Dias, Gustavo Henrique Denzin Tonoli, Elisangela Elena Nunes de Carvalho, Eduardo Valerio de Barros Vilas Boas, Muhammad Irfan, Muhammad Bilal, Julieta Rangel de Oliveira, Marcelo Franco
Summary: The objective of this study was to investigate the effect of adding nanocellulose gel from cocoa bean husk (NAC) on nanocellulose gels of Eucalyptus sp. and Pinus sp. The results showed that the addition of NAC improved the degradation, solubility, and biodegradability of the films, especially for Eucalyptus sp., suggesting the potential use of NAC in the formulation of biodegradable packaging.
WASTE AND BIOMASS VALORIZATION
(2023)
Article
Engineering, Chemical
Bruna Rage Baldone Lara, Paulo Sergio de Andrade, Ana Carolina Salgado de Oliveira, Mario Guimaraes Junior, Lays Camila Matos, Gustavo Henrique Denzin Tonoli, Marali Vilela Dias
Summary: The study demonstrates that corona treatment improves the adhesion between the two layers of biocomposite films and enhances their wear resistance and ductility. The lamination process and corona treatment increase the affinity of the films with water, resulting in higher permeability.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Polymer Science
Fabiola Martins Delatorre, Gabriela Fontes Mayrinck Cupertino, Michel Picanco Oliveira, Felipe da Silva Gomes, Luciene Paula Roberto Profeti, Demetrius Profeti, Mario Guimaraes Junior, Marcia Giardinieri de Azevedo, Daniel Saloni, Ananias Francisco Dias Junior
Summary: This study evaluates the potential of charcoal fines as reinforcing agents in biocomposites, exploring the effects of pyrolysis temperatures. Charcoal fines produced at 800 degrees C show promising properties as fillers in polymeric matrices, improving strength and elasticity of biocomposites. The results indicate that biocomposites incorporating charcoal fines from high-temperature pyrolysis exhibit enhanced mechanical properties and morphology, making them a promising alternative in engineering applications.
Article
Materials Science, Multidisciplinary
Amanda Carneiro, Michelly Oliveira, Camila Souza, Thais Paim, Angelica Cruz, Joao Victor Alves, Mario Guimaraes Junior
Summary: The reactive flotation of silica-carbonated phosphate ore was investigated using sulfuric and phosphoric acids and PVA as reagents. Phosphoric acid reduced the CaO/P2O5 ratio and increased the P2O5 grade. The best result was achieved with 10% phosphoric acid and 0.5% PVA, providing a 30% increase in P2O5 grade.
MATERIA-RIO DE JANEIRO
(2023)
