Article
Materials Science, Multidisciplinary
Stanislas Le Guisquet, Marco Amabili
Summary: This study characterizes the viscoelastic properties of a hydrogel in sol-gel transition by measuring the vibration response of a rigid circular cylindrical container's bottom silicone membrane. A finite-element numerical model was built for identification of the hydrogel's storage shear modulus and loss tangent. It was found that membrane vibration can be used to characterize the viscoelastic mechanical properties of a hydrogel in sol-gel transition in a more versatile way.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Chemistry, Applied
Ruijing Qu, Mengxue Tang, Yong Wang, Dong Li, Lijun Wang
Summary: Cellulose and TEMPO-oxidized cellulose fibers (TOCF) were prepared from wheat straw with ultrasonic and chemical treatments to investigate their structure and functionalities. Rheology was used to study the sol-gel transition of TOCF suspensions, showing that ultrasonic pretreatment and temperature affected the properties. While the functional groups were similar, XRD and TGA revealed different crystal structures and thermal stabilities. Gelation was independent of ultrasonic pretreatment, but rheological properties were highly influenced by concentration and temperature.
CARBOHYDRATE POLYMERS
(2021)
Article
Electrochemistry
Dawid Kasprzak, Maciej Galinski
Summary: This paper explores the preparation and electrochemical performance of chitin- and chitin-cellulose-based hydrogel electrolytes for use in green electrochemical capacitors. The materials demonstrated high efficiency in terms of specific capacitance, power density, and cyclability, making them promising components for environmentally friendly energy storage devices.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(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
Polymer Science
Biao Zhang, Guillaume Sudre, Guilhem Quintard, Anatoli Serghei, Julien Bernard, Etienne Fleury, Aurelia Charlot
Summary: This study mixed RAFT-made poly(ionic liquid) chains with an ionic liquid, leading to homogeneous and transparent solutions due to similarities in structure and polarity. Rheology investigation showed that the solution's viscoelastic properties can be finely tuned by adjusting the chain molar mass and concentration. The high ionic conductivity and multi-scale local homogeneity of the PIL/IL solutions were confirmed through X-ray scattering experiments and microscopy analysis.
Article
Chemistry, Applied
Ruican Wang, Richard W. Hartel
Summary: This study focused on the impact of sweeteners on the properties of gelatin gels, finding that high-sweetener systems exhibited stronger gel properties at higher temperatures, with the transition depending on bulk viscosity. Gels with high sugar content had weaker internal interactions and more dispersed junction zones, while gel surfaces were mostly hydrophobic except at higher sugar levels. Gel hardness and tackiness increased with gelatin concentration, but did not change significantly with moisture/sugar content.
FOOD HYDROCOLLOIDS
(2022)
Article
Chemistry, Multidisciplinary
Gabriela Huminic, Angel Huminic
Summary: This study investigates the use of new working fluids NH3/IL+ CNMs solutions as an alternative to conventional working fluids. The results indicate that by adding nanomaterials, the thermal conductivity of the solution increases while its viscosity and specific heat decrease.
Article
Chemistry, Applied
Xiaokun Shi, Zhiping Chen, Yonghui He, Qin Lu, Rimei Chen, Chao Zhao, Die Dong, Yupei Sun, Hui He
Summary: A novel wound dressing with rapid hemostasis and antibacterial activity has been developed, which can achieve dual response through white light and NIR irradiation. The dressing exhibits excellent biocompatibility and has promising applications in first-aid hemostasis and wound healing.
CARBOHYDRATE POLYMERS
(2022)
Review
Polymer Science
Ahmad Adlie Shamsuri, Khalina Abdan, Siti Nurul Ain Md. Jamil
Summary: The improvement of ecological conscience has led researchers to focus on reducing processing time and cost of solvents for cellulose dissolution, with ionic liquids being widely employed due to their recyclability and nonvolatility. Various biopolymers, such as chitosan, chitin, starch, protein, and cellulose acetate, can also be processed using ionic liquids for diverse applications. The review discusses examples of imidazolium-based ionic liquids commonly used for cellulose dissolution, as well as organic liquids used as co-solvents for ionic liquids. Additionally, it demonstrates the properties and applications of regenerated cellulose and blends from different types of cellulose/ionic liquid/co-solvent solutions, serving as a model basis for novel applications.
Article
Chemistry, Applied
Tobiasz Gabrys, Beata Fryczkowska, Dorota Binias, Czeslaw Slusarczyk, Janusz Fabia
Summary: The study demonstrates that the addition of graphene oxide can significantly improve the properties of cellulose-based composite fibers, resulting in increased crystallinity and mechanical properties, as well as good dispersion of GO throughout the composite fibers.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Physical
Kodai Kikuchi, Kazuyoshi Kaneko, Jeong Seonju, Ryo Fukaya, Makiko Yamada, Hirotaka Ishii, Toshifumi Inoue, Akio Shimizu
Summary: Cellulose hydrogels were prepared using cellulose/1-butyl-3-methylimidazolium acetate/dimethyl sulfoxide at temperatures ranging from 5 to 60 degrees C. The relationship between gelation temperature and physicochemical properties of the gel was investigated. Interactions between cellulose and ionic liquids and between cellulose and cellulose were studied using molecular simulations, nuclear magnetic resonance, and density functional theory calculations, providing insights into the effects of gelation temperature on gel properties.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Biochemistry & Molecular Biology
Jia Wei, Yan Long, Binqi Wang, Huizheng Wu, Hongshuai Gao, Yi Nie
Summary: The presence of metal ions in ionic liquids can negatively impact the properties of regenerated cellulose fiber, particularly their stress sensitivity.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2024)
Article
Polymer Science
Haruna Mizuno, Kei Hashimoto, Keisuke Shigenobu, Hisashi Kokubo, Kazuhide Ueno, Masayoshi Watanabe
Summary: The use of atomic force microscopy allowed for direct observation of photo-induced reversible changes in a block copolymer self-assembly containing an azobenzene ionic liquid and undergoing sol-gel transition. This transition was accompanied by a structural change from order to disorder, leading to a change in ionic conductivity. Surprisingly, the rapid photo-induced changes in conductivity and rheology occurred within approximately 30 seconds, possibly due to the fast diffusion of the ionic liquid.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Electrochemistry
Dawid Kasprzak, Maciej Galinski
Summary: This study introduces a novel nonaqueous biopolymer-based gel electrolyte containing an ionic liquid for high-voltage electrochemical capacitors. The gel electrolyte exhibits high specific capacitance, energy-power densities, and excellent cyclability, making it a promising eco-friendly material for high-performance supercapacitors.
ELECTROCHEMISTRY COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
David Head
Summary: A family of marginally rigid spring networks with fractal structure was created and their viscoelastic spectra were calculated. Two scaling regimes were observed at different frequencies, consistent with theoretical predictions. The findings were shown to be relevant in real-world applications.
PHYSICAL REVIEW LETTERS
(2022)
