Article
Forestry
Danchen Shi, Wenxuan Wang, Daxin Liang, Zengcheng He, Yonggui Wang, Zefang Xiao, Yang Yu, Haigang Wang, Yanjun Xie
Summary: In this study, titanium dioxide (TiO2) nanoparticles were deposited onto a wood surface via a bridge of 3-isocyanatopropyltriethoxysilane (IPTS). Accelerated weathering tests were conducted to evaluate the treatment effect on the anti-weathering properties of poplar wood. The results suggest that IPTS-TiO2 modification is feasible for improving the anti-weathering properties of poplar wood and may provide an effective strategy for industrial wood modification.
EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS
(2023)
Article
Biochemistry & Molecular Biology
Gary Chinga-Carrasco, Jenny Johansson, Ellinor Baevre Heggset, Ingebjorg Leirset, Camilla Bjorn, Karin Agrenius, Jasna S. Stevanic, Joakim Hakansson
Summary: Chemical pretreatment and autoclaving altered the characteristics of cellulose nanofibrils (CNFs). In vitro tests revealed the potential application of CNFs in cytotoxicity evaluation and skin irritation assessment.
Article
Chemistry, Multidisciplinary
Weiqing Kong, Chaoji Chen, Gegu Chen, Chengwei Wang, Dapeng Liu, Siddhartha Das, Guang Chen, Tian Li, Jianguo Li, Yang Liu, Zhihan Li, Bryson Callie Clifford, Liangbing Hu
Summary: This study reports a wood ionic cable made of aligned nanofibrils, showcasing a combination of biocompatibility, high mechanical strength, high ionic conductivity, and excellent stability. The nanochannels and negative charges on the surfaces of the nanofibrils provide opportunities for ion regulation at low salt concentrations. The Na+ ion conductivity of the wood ionic cable is significantly higher than that of bulk NaCl solution at the same concentration, opening up new possibilities for novel ionic device designs.
Article
Polymer Science
Tomislav Grzan, Lucianna Grieco, Vjekoslav Zivkovic, Goran Mihulja
Summary: Various surface modification techniques have been developed to enhance the wetting, adhesion, and printing properties of synthetic polymer surfaces by adding functional groups. UV irradiation has shown potential as a suitable method for surface modification of polymers, which can also improve the bonding properties of wood-glue systems. This study aimed to assess the feasibility of UV irradiation as a pretreatment for wood surfaces before gluing and evaluate the properties of wooden glued joints. The research found that UV irradiation improved the bonding properties of differently machined wood.
Article
Chemistry, Applied
Vanja Kokol, Sara Novak, Veno Kononenko, Monika Kos, Vera Vivod, Nina Gunde-Cimerman, Damjana Drobne
Summary: Dialdehyde cellulose nanofibrils (CNF) and nanocrystals (CNC) were prepared and subsequently functionalized to create partially crosslinked micro-sized particles (CNF/CNC-ox-HMDA). CNF/CNC-ox-HMDA showed higher antibacterial activity, especially against S. aureus.
CARBOHYDRATE POLYMERS
(2023)
Article
Chemistry, Multidisciplinary
Jianhua Zhou, Hong Li, Yannan Li, Xiang Li
Summary: Cellulose nanocrystals (CNCs) were successfully modified using an amphiphilic triblock copolymer bearing epoxy functionalities, resulting in improved surface properties and dispersion in various solvents. The modified CNCs exhibited pH responsive properties and stability in Pickering emulsions, with droplet size increasing gradually with time or increasing pH. This work demonstrates a method to design sophisticated CNC-based materials with enhanced properties conferred by multifunctional grafted chains.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Review
Biochemistry & Molecular Biology
Qing Shen
Summary: Renewed interests in lignin and its derivatives have led to increased research on their potential to replace petroleum and produce new sustainable materials. Studies have resulted in a comprehensive database on the surface properties characterization and modification of these renewable materials. This review summarizes recent advancements in methods for characterizing and modifying the surface properties of lignin, and provides a perspective for future research.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Polymer Science
Branimir Jambrekovic, Emi Govorcin Bajsic, Nikola Spanic, Tomislav Sedlar, Tomislav Sinkovic
Summary: This study investigates the dynamic mechanical and thermal behavior of styrene modified wood. The results show that the modification with styrene can increase the glass transition temperature and thermal stability of the wood.
Review
Engineering, Manufacturing
Suman Chhetri, Habiba Bougherara
Summary: The review summarized the current state of research on surface modification of UHMWPE fiber and UHMWPE/polymer interfacial properties. Various surface modifications of UHMWPE fiber classified as 'wet' chemical and 'dry' techniques have been detailed with relevant examples. In addition, the relationship between fiber/matrix adhesion and mechanical properties of the composites has been explored. Lastly, the potential and challenges of each modification method have been discussed.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Materials Science, Paper & Wood
Oleg V. Surov, Marina I. Voronova, Anatoly G. Zakharov
Summary: In this study, methods for synthesizing cellulose nanocrystal (CNC) conjugates with chlorotriazine reactive dyes (RDs) were successfully developed. Characterization using various techniques confirmed the successful covalent bonding of the dyes to the CNC surface, with high colloidal stability observed in aqueous suspensions. Additionally, the CNC-RD conjugates effectively stabilized n-decane emulsions in water, demonstrating their potential in applications such as Pickering emulsions.
Article
Biochemistry & Molecular Biology
Jing Gao, Li Zhang, Shejiang Liu, Xiuli Liu
Summary: This study synthesized a series of magnetic adsorbents for the removal of Cu(II) from water. The adsorption process was found to follow pseudo-second-order kinetics and Langmuir model, indicating monolayer chemical adsorption. FTIR and XPS analysis confirmed the adsorption mechanism to be electrostatic attraction and chemical coordination.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Materials Science, Paper & Wood
Arthur Bouchut, Bernard Cathala, Celine Moreau, Michael Lecourt, Michel Petit-Conil, Asja Pettignano, Julien Bernard, Aurelia Charlot, Etienne Fleury
Summary: This study reports a strategy to functionalize cellulosic surfaces through physical adsorption of xyloglucan (XG) and carboxymethyl cellulose (CMC) derivatives bearing allyl or alkyne groups. The derivatives with degrees of substitution ranging from 0.10 to 0.44 are prepared through the opening of the epoxide ring under mild basic aqueous medium. The deposition of these functionalized polysaccharides onto Whatman paper and wood pine fibers shows that the physisorption of the polymer chains is not altered by the extent of the modification or the nature of the substituents.
Article
Materials Science, Paper & Wood
A. A. Vjuginova, A. A. Novik, S. N. Vjuginov, V. A. Ivanov
Summary: This study evaluated the effect of ultrasonic densification technology on the surface hardness of different wood species. The treatment increased surface density and hardness without damaging the internal structure of the wood.
WOOD MATERIAL SCIENCE & ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Nassima El Miri, Ellinor Baevre Heggset, Sara Wallsten, Anna Svedberg, Kristin Syverud, Magnus Norgren
Summary: This study aimed to modulate the properties of cellulose nanocrystals (CNCs) by introducing different functional groups on the surface through various chemical modifications. The results showed that the properties of CNCs varied depending on the grafted functionalities. Interestingly, the modifications maintained colloidal stability and improved thermal stability and oxygen barrier properties.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Environmental Sciences
Xiangrui Kong, Christian Mark Salvador, Staffan Carlsson, Ravikant Pathak, Kent O. Davidsson, Michael Le Breton, Samuel Mwaniki Gaita, Kalyan Mitra, Asa M. Hallquist, Mattias Hallquist, Jan B. C. Pettersson
Summary: Modern small-scale biomass burners are considered as an important renewable energy source due to their economic and environmental advantages over fossil fuels. However, the emissions of gas and particulate matter are not fully understood, causing uncertainty about their impacts on health and climate. Research on emissions from residential wood-burning boilers identified six factors, with lignin and cellulose/hemicellulose pyrolysis products being the major sources of brown carbon.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Victoria Rigual, Gabriella Papa, Alberto Rodriguez, Maren Wehrs, Kwang Ho Kim, Mercedes Oliet, M. Virginia Alonso, John M. Gladden, Aindrila Mukhopadhyay, Blake A. Simmons, Seema Singh
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Chemistry, Applied
M. Mar Villar-Chavero, Juan C. Dominguez, M. Virginia Alonso, Mercedes Oliet, Francisco Rodriguez
CARBOHYDRATE POLYMERS
(2020)
Article
Engineering, Chemical
Miguel Ayuso, Pablo Navarro, Andre M. Palma, Marcos Larriba, Noemi Delgado-Mellado, Julian Garcia, Francisco Rodriguez, Joao A. P. Coutinho, Pedro J. Carvalho
SEPARATION AND PURIFICATION TECHNOLOGY
(2020)
Article
Biotechnology & Applied Microbiology
Sandra Rivas, Victoria Rigual, Juan Carlos Dominguez, M. Virginia Alonso, Mercedes Oliet, Juan Carlos Parajo, Francisco Rodriguez
FOOD AND BIOPRODUCTS PROCESSING
(2020)
Article
Biochemistry & Molecular Biology
Antonio Ovejero-Perez, Victoria Rigual, Juan Carlos Dominguez, M. Virginia Alonso, Mercedes Oliet, Francisco Rodriguez
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2020)
Article
Chemistry, Applied
Juan Carlos Dominguez, Belen Del Saz-Orozco, Mercedes Oliet, M. Virginia Alonso, Francisco Rodriguez
Summary: The thermal degradation kinetics of phenolic foam, lignin particle-reinforced phenolic foam, and lignin reinforcement were studied using the discrete DAEM and MFK methods to obtain activation energy values. The effect of reinforcement on LRPF kinetics was analyzed, showing a modification in the degradation process. No compensation effect for kinetic parameters was found between Vyazovkin method and DAEM results.
JOURNAL OF CELLULAR PLASTICS
(2021)
Article
Chemistry, Multidisciplinary
Antonio Ovejero-Perez, Miguel Ayuso, Victoria Rigual, Juan Carlos Dominguez, Julian Garcia, M. Virginia Alonso, Mercedes Oliet, Francisco Rodriguez
Summary: This study offers a technoeconomical analysis of the IL recovery step in a real biorefinery pretreatment process by analyzing the influence of washing water volumes on enzymatic hydrolysis and IL recovery costs. The results showed that incremental volumes of water led to higher operating costs in the IL recovery step, which can be compensated with less IL makeup costs.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Review
Chemistry, Applied
Cynthia Hopson, M. Mar Villar-Chavero, Juan C. Dominguez, M. Virginia Alonso, Mercedes Oliet, Francisco Rodriguez
Summary: Cellulose ionogels are extensively studied for their versatile properties and wide-ranging applications. The ability to encapsulate an ionic liquid in a biodegradable matrix makes it a promising alternative to fossil fuel-derived materials. The flexibility in formulation, choice of additives, and different cellulose types allow for customization for specific applications in various fields.
CARBOHYDRATE POLYMERS
(2021)
Article
Biochemistry & Molecular Biology
Antonio Ovejero-Perez, Victoria Rigual, Mercedes Oliet, Francisco Rodriguez, Juan Carlos Dominguez, M. Virginia Alonso
Summary: Biomass fractionation plays a crucial role in the development of competitive biorefineries, especially in the isolation and recovery of lignin. This study compared two fractionation processes, organosolv and ionosolv, using autohydrolyzed hemicellulose-free poplar as feedstock. The results showed that the ionosolv process at higher temperature achieved higher lignin recovery and produced more thermally stable lignin. The two processes had different effects on lignin recovery and properties.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Energy & Fuels
Tamara M. Santos, Victoria Rigual, Juan C. Dominguez, M. Virginia Alonso, Mercedes Oliet, Francisco Rodriguez
Summary: Lignocellulosic materials have great potential as feedstock for biofuel and bioproduct production. This study focused on the fractionation of Pinus radiata wood using an organosolv process. The effects of temperature, time, and ethanol concentration on the yield, degree of delignification, hemicellulose content, and glucan content of the delignified solid were evaluated. Increasing severity of the organosolv process and reducing ethanol concentration resulted in higher glucan enrichment in the delignified solid. The liquid fraction obtained during the process was used to recover lignin and hemicellulosic fractions. The hemicellulose and lignin content of the delignified solid were correlated with thermal stability measurements.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Agricultural Engineering
Cynthia Hopson, Victoria Rigual, Juan C. Dominguez, M. Virginia Alonso, Mercedes Oliet, Francisco Rodriguez
Summary: The increase in environmental problems and the need for substituting fossil fuels has led to a demand for new raw materials and formulation methods. This study utilized a cellulose-rich solid from a biorefinery process to create gel-type materials and ionogels. The ionogels demonstrated higher rheological properties and important characteristics due to the utilization of a phosphate anion ionic liquid. Additionally, the presence of lignin in the ionogels enhanced their rheological properties without affecting their internal structure and morphology.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Education, Scientific Disciplines
J. C. Dominguez, M. V. Alonso, E. J. Gonzalez, M. I. Guijarro, R. Miranda, M. Oliet, V. Rigual, J. M. Toledo, M. M. Villar-Chavero, P. Yustos
Summary: The study aims to develop teaching materials for chemical engineering students to encourage self-learning, support teaching courses, and develop problem generators and lecturing tools to facilitate student learning.
EDUCATION FOR CHEMICAL ENGINEERS
(2021)