Article
Chemistry, Multidisciplinary
Huamei Yang, Ju Jiang, Bingzhe Zhang, Wenyuan Zhang, Weining Xie, Jing Li
Summary: This study investigates the effect of [BMIM]HSO4/ethanol pretreatment on the thermal behavior of undissolved cellulose. The results show that the pretreatment effectively lowers the thermal stability of cellulose and promotes its thermal decomposition at low temperature.
Article
Biochemistry & Molecular Biology
Yuki Shigenobu, Aoi Nakashima, Jun-ichi Kadokawa
Summary: In this study, chitin benzoate stearates with thermoplasticity were synthesized through acylation reaction in an ionic liquid. The introduction of benzoyl and stearoyl groups resulted in the formation of products with regular crystalline structures, which exhibited melting points and could be processed into films during melt-pressing.
Article
Chemistry, Multidisciplinary
Wenwen Fang, E. Yee Lim, Kaarlo Leo Nieminen, Herbert Sixta
Summary: Superbase-based ionic liquids are effective for dissolving cellulose and producing high-tenacity regenerated textile fibers. The presence of a small amount of water in the ionic liquid improves the spinning performance without affecting the mechanical properties of the fibers.
Article
Biochemistry & Molecular Biology
Carlos A. Pena, Alberto Puga, Andreas Metlen, Ana Soto, Hector Rodriguez
Summary: Non-dissolving pretreatment can reduce the crystallinity of cellulose and improve its reactivity without affecting its degree of polymerization and thermal stability.
Article
Biochemistry & Molecular Biology
Eduardo Maurina Morais, Alexander Idstrom, Lars Evenaes, Anna Martinelli
Summary: The dynamical properties of four protic ionic liquids containing ethyltriazolium and ethylimidazolium cations were investigated with triflate and bistriflimide anions. The transport properties were strongly influenced by the cation nature, with the ethyltriazolium cation resulting in slower dynamics. The fragility of the ionic liquids was estimated to fall within the range of very fragile glass-forming materials.
Article
Engineering, Chemical
Mi Wang, Yanlei Wang, Tao Zhang, Yu Xia, Hongyan He
Summary: In this study, the regulating mechanism of structural, thermodynamical, and diffusive properties of 18 imidazole ionic liquids (ILs) with different anions was investigated using molecular dynamics simulations and theoretical analysis. It was found that the radial distribution function and coordinate number of these ILs were similar, while the vibrational spectrum and diffusive property varied greatly with the anion structure, resulting in a significant change in the self-diffusive coefficient (SDC). Moreover, the SDC was found to have an exponential relationship with free energy and entropy, suggesting that these can be key indicators in designing high-performance ILs for practical chemical engineering applications.
Article
Chemistry, Physical
Anthony J. Lucio, Iwan Sumarlan, Elena Bulmer, Igor Efimov, Stephen Viles, A. Robert Hillman, Christopher J. Zaleski, Karl S. Ryder
Summary: In this study, a chloroaluminate electrolyte was made by reacting AlCl3 with Acet-Cl salt to obtain a more performant liquid electrolyte. A novel method for extracting ionic conductivity was established and compared to conventional methods. The electrolytes made with Acet-Cl showed significant improvement (5-10x higher) compared to those made with similar Lewis base salts. This study is an important step towards designing cost-effective and performant liquid electrolytes for Al-ion battery applications.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Alex Spiess, Philipp Brandt, Alexa Schmitz, Christoph Janiak
Summary: Water sorption characteristics of six pure hydrophilic ionic liquids were investigated, revealing a steady and high water uptake with a small hysteresis between absorption and desorption. These findings provide valuable insights into the water sorption behavior of ionic liquids.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Biochemistry & Molecular Biology
Dan Chen, Zhe Zhao, Yingying Wu, Sangeeta Prakash, Jie Wan
Summary: The dissolution behavior of three different corn starches (CS, HACS, and WCS) in two ionic liquids ([AMIM]Cl and [BMIM]Cl) was studied, and the structural and thermal properties of the regenerated starch were analyzed. WCS, with the lowest amylose content, showed the fastest dissolution rate, the most extensive structural damage, the lowest solubility, and required the most energy for dissolution. During the dissolution-regeneration process, the A-type crystalline structure of WCS and CS was completely destroyed and transformed into an amorphous structure, while the B-type structure of HACS transformed into an ordered V-shaped structure. Additionally, the thermal stability of the starch improved after dissolution-regeneration in the ILs. Among the two ILs, [AMIM]Cl demonstrated superior ability to dissolve starch with minimal damage.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Analytical
Shuxian Wang, Cunying Xu, Yixin Hua, Xiangyu Ren, Jingling Lu, Jianru Li, Xiao Chen, Qinqin Xiang, Yan Li
Summary: The study investigated the anodic dissolution behaviors of aluminum in AlCl3-[BzMIM]Cl ionic liquid using various electrochemical techniques. Passivation was observed during the process, with an increase in temperature leading to a positive shift in corrosion potential, an increase in corrosion current density, and a decrease in polarisation resistance. Impedance measurements indicated that the anodic dissolution process of aluminum consisted of charge transfer, confinement of the passivated film on the electrode surface, and diffusion-induced Warburg impedance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Review
Chemistry, Multidisciplinary
Keisuke Shigenobu, Taku Sudoh, Junichi Murai, Kaoru Dokko, Masayoshi Watanabe, Kazuhide Ueno
Summary: Highly concentrated electrolytes (HCEs) have similar properties to ionic liquids (ILs) due to their high ionic nature, and some HCEs behave like ILs. HCEs have potential as electrolyte materials for future lithium secondary batteries due to their favorable properties both in bulk and at the electrochemical interface. This study investigates the effects of solvent, counter anion, and diluent of HCEs on the Li+ ion coordination structure and transport properties, revealing the difference in ion conduction mechanisms and their relationship to tLiabc values.
Article
Polymer Science
Michael Sturm, Jussi K. J. Helminen, Aarni Honkasalo, Annariikka Roselli, Niklas von Weymarn, Ilkka Kilpelainen
Summary: This study investigates the application of an advanced solvent ([MTBDH][AcO]) in the Lyocell textile fiber process. Despite an increase in hydrolysis level of the solvent, cellulose can still be dissolved and spun to obtain stable fibers, with little influence on the physical properties of the obtained fibers.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Biomedical
Kevin Peng, Yongsheng Gao, Pavimol Angsantikul, Anthony LaBarbiera, Morgan Goetz, Alexander M. Curreri, Danika Rodrigues, Eden E. L. Tanner, Samir Mitragotri
Summary: Studies have shown that choline-based ionic liquids can significantly enhance the absorption of macromolecular drugs in the gastrointestinal tract by reducing drug interactions with mucus or disrupting the mucus layer, potentially improving the success rate of oral drug delivery.
ADVANCED HEALTHCARE MATERIALS
(2021)
Article
Engineering, Chemical
Jiming Yang, Kai Luo, Xingmei Lu, Wei He, Shuangfei Zhao, Zheng Fang, Yirong Feng, Ning Zhu, Kai Guo
Summary: In this study, hydrophobic ionic liquids (ILs) were used for the dissolution and selective extraction of polyhydroxy compounds. The interaction between ILs and polyhydroxy compounds was analyzed, and it was found that these ILs showed strong selective extraction ability. The regenerated ILs maintained their structure after polyhydroxy compounds were extracted by water. This research provides a promising direction for the development of a green and efficient method for fractionating polyhydroxy compounds based on hydrophobic ILs.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Oscar Cabeza, Luisa Segade, Montserrat Dominguez-Perez, Esther Rilo, David Ausin, Julio A. Seijas, M. Pilar Vazquez-Tato, Vladimir Matleev, Alexandr Ievlev, Josefa Salgado, Luis M. Varela
Summary: This paper presents a study on a new family of ionic liquids, investigating the differences in electrical conductivity, viscosity, and diffusion coefficient among various metal thiocyanate ILs. Despite their chemical similarities, these compounds exhibit significant variations in transport properties.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Organic
Andreas C. Baumruck, Daniel Tietze, Annegret Stark, Alesia A. Tietze
JOURNAL OF ORGANIC CHEMISTRY
(2017)
Article
Environmental Sciences
Ovokeroye A. Abafe, Jana Spath, Jerker Fick, Stina Jansson, Chris Buckley, Annegret Stark, Bjoern Pietruschka, Bice S. Martincigh
Article
Chemistry, Applied
Muhammad Mohsin Azim, Annegret Stark
MICROPOROUS AND MESOPOROUS MATERIALS
(2018)
Article
Chemistry, Applied
Muhammad Mohsin Azim, Alfonso Pensado, Barbara Kirchner, Torsten Gutmann, Pedro B. Groszewicz, Gerd Buntkowsky, Annegret Stark
MICROPOROUS AND MESOPOROUS MATERIALS
(2018)
Article
Environmental Sciences
Denise Schneider, Susan Wassersleben, Michael Weiss, Reinhard Denecke, Annegret Stark, Dirk Enke
WASTE AND BIOMASS VALORIZATION
(2020)
Article
Chemistry, Multidisciplinary
Muhammad Mohsin Azim, Annegret Stark
Article
Materials Science, Multidisciplinary
Kudzai Mugadza, Patrick G. Ndungu, Annegret Stark, Vincent O. Nyamori
JOURNAL OF MATERIALS SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
Kudzai Mugadza, Patrick G. Ndungu, Annegret Stark, Vincent O. Nyamori
MATERIALS CHEMISTRY AND PHYSICS
(2019)
Review
Chemistry, Physical
Kudzai Mugadza, Annegret Stark, Patrick G. Ndungu, Vincent O. Nyamori
Article
Green & Sustainable Science & Technology
Ncamisile Nondumiso Maseko, Denise Schneider, Susan Wassersleben, Dirk Enke, Samuel Ayodele Iwarere, Jonathan Pocock, Annegret Stark
Summary: In this study, a thermo-chemical treatment method was utilized to produce high-quality biogenic amorphous silica from South African sugarcane residues, with citric acid pre-treatment identified as an effective alternative to mineral acids.
Article
Green & Sustainable Science & Technology
Kudzai Mugadza, Annegret Stark, Patrick G. Ndungu, Vincent O. Nyamori
Summary: The research focuses on the synthesis of nitrogen-doped carbon nanotubes (N-CNTs) from biomass as carbon precursors for supercapacitor electrodes. The study investigates the use of ionic liquid and biomass in the synthesis process, analyzing their effects on the physical and electrochemical properties of N-CNTs. The results indicate that biomass sources can significantly impact the properties of N-CNTs, with ILCel-CNTs showing the highest specific capacitance.
Review
Energy & Fuels
Edwin T. Mombeshora, Annegret Stark
Summary: Graphene oxide (GO) has favorable characteristics for a number of applications, particularly in electronic devices. Utilizing GO as carbocatalysts or catalyst supports is an active research area, with emerging reports for biorefinery-related conversions. The unique and tuneable nature of GO-based materials presents a tremendous opportunity for efficient biomass conversion and value creation.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Engineering, Electrical & Electronic
Kudzai Mugadza, Edwin T. Mombeshora, Annegret Stark, Patrick G. Ndungu, Vincent O. Nyamori
Summary: This study evaluated the electrochemical performance of cellulose-based multi-walled carbon nanotubes (MWCNTs) as electrode materials after different treatment protocols. The results showed that treatment methods affect the specific capacitance, cycle stability, and electrochemical properties of the materials.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Agronomy
P. Naidoo, D. Lokhat, A. Stark
INTERNATIONAL SUGAR JOURNAL
(2019)
Meeting Abstract
Chemistry, Multidisciplinary
Muhammad Mohsin Azim, Annegret Stark
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2018)
