Article
Chemistry, Multidisciplinary
Katherine S. Lefroy, Brent S. Murray, Michael E. Ries
Summary: This study investigates the effect of oil addition on the dissolving capacity of the ionic liquid BmimAc for cellulose. The results indicate that the order of mixing constituents plays a key role in the dissolution process, with hydrophobic interactions being crucial. The findings highlight the need for further evaluation of accepted mechanisms for cellulose dissolution in ionic liquids.
Article
Chemistry, Physical
Xiucan Jia, Yutian Ma, Xiaopo Wang
Summary: In this study, the vapor-liquid equilibrium of 3, 3, 3-Trifluoropropene (R1243zf) with [Emim][BF4] and [Bmim][BF4] ionic liquids was measured, and the experimental results were correlated using the NRTL model. The effects of different anions and cations on the liquid phase molar fraction of R1243zf were studied. In addition, thermodynamic properties and phase behavior of different HFO refrigerants with [Emim][BF4] were compared and analyzed.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Thermodynamics
P. V. S. S. Rama Rao, T. S. Krishna, Ponnuri Bharath, Ranjan Dey, D. Ramachandran
Summary: This study examines the properties of binary blends of 1-butyl-3-methylimidazolium bis(trifluromethylsulfonyl)imide ionic liquid with Ethyl acetate at various temperatures, discussing molecular interactions and temperature effects through excess properties. The results are adequately fitted with the Redlich-Kister polynomial equation, providing insight into molecular interactions and temperature effects.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2021)
Article
Chemistry, Physical
Jared Beshai, Thomas DiSorbo, Jacob Hutfles, Jacob Segil, Richard F. ff Weir, John Pellegrino
Summary: This study presents the key characteristics of implementing cellulose acetate (CA) coatings on carbon cloth used as a fuel diffusion layer in aqueous fuel-fed cells, and demonstrates their functionality. The results show that these coatings enhance aqueous solution permeation and adhesion properties, leading to a two-fold increase in maximum power generation in alkaline DGFCs.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Xiucan Jia, Yong Luo, Xiaopo Wang
Summary: This study measured the solubility of HFO1243zf in [HMIM][PF6] and [OMIM][PF6], and correlated the experimental data using appropriate models. The mixing thermodynamic properties of R1243zf + [HMIM][PF6] and R1243zf + [OMIM][PF6] solutions were computed, and the dissolving performances of different HFOs were compared and analyzed.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Materials Science, Paper & Wood
Nora S. Alrefaei, Peter J. Hine, Michael E. Ries
Summary: This study investigated the dissolution of hemp yarns in an ionic liquid and found that the dissolution process is affected by time and temperature. The yarns were observed to swell in water, and the swelling ratios of different regions were measured. Additionally, the study discovered that the growth of the coagulated region follows a diffusion process, which can be modeled mathematically.
Article
Materials Science, Paper & Wood
Ling Yang, Hong Peng, Hongwei He, Ling Liu, Guiming Fu, Yuhuan Liu, Yin Wan
Summary: In this study, cellobiose was used as a model of cellulose to investigate the dissolution mechanism in imidazolium halide-based ionic liquids (ILs). The interaction between ILs and cellobiose was analyzed using carbon-13 nuclear magnetic resonance (13C NMR). The results revealed that the strength of hydrogen bonds formed between the hydroxyl groups of cellobiose and ILs was influenced by the position of the hydroxyl groups and the electro-negativity and size of the anions. The formation of hydrogen bonds between the halogen anions and cellobiose was identified as the main reason for the dissolution of cellobiose in ILs.
Article
Chemistry, Physical
Yafei Xiao, Minghua Zhang, Dawei Dong, Peixin Gong, Yingqing Ye, Shuhua Peng, Mingyu Deng, Minmin Fan, Ya Cao, Ke Wang
Summary: Ionic liquids provide an efficient way for dissolving cellulose, but the dissolution mechanism remains a major challenge. In this study, various spectroscopic techniques were used to investigate the interaction between cellulose and [Amim][Cl] during heating, revealing that the destruction of hydrogen-bonding interaction between cellulose and [Amim][Cl] is due to the evaporation of water in [Amim][Cl] as temperature increases.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Shiyu Nie, Fengfeng Chen, Tianbo Shen, Tingting Wang, Ningyu Di, Junkuo Gao
Summary: Adjusting the internal porous environment of MOFs to enhance their adsorption properties is considered an effective strategy to improve their gas separation performance. In this study, UiO-66 was encapsulated with 1-ethyl-3-methyl-imidazolium acetate ([Emim][Ac]) to improve CO2 capture performance. The [Emim][Ac]@UiO-66 exhibited higher CO2 adsorption capacity and selectivity compared to the original UiO-66, indicating its potential as an efficient absorbent for gas separations.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Applied
Mohammad Hossein Naeli, Jafar M. Milani, Jamshid Farmani, Azizollaah Zargaraan
Summary: This study aimed to develop and optimize low saturated oleogel shortenings using ethylcellulose or ethylcellulose/hydroxypropyl methylcellulose biopolymers as oleogelators, sunflower oil as the base oil, and palm stearin as the source of saturated fatty acids. Oleogel shortenings had significantly lower saturation levels compared to commercial shortening samples, with similar melting point, firmness, and rheological properties. However, they had lower solid fat content and oxidation induction period. Oleogel made using ethylcellulose/hydroxypropyl methylcellulose biopolymers had even lower saturation level, solid fat content, oxidation induction period, and firmness but a higher melting point compared to that made using ethylcellulose.
Article
Chemistry, Physical
Md Rabiul Islam, Maroof Ali
Summary: This study investigates the molecular level behavior of ternary mixture of ionic liquid (IL) 1-butyl-3-methyl imidazolium tetrafluoroborate ([bmim][BF4]) with water (H2O) and methanol (MeOH). The results demonstrate that the addition of aqueous methanol to [bmim][BF4] modulates the physicochemical properties of the IL in an interesting and favorable manner, with higher polarity and dipolarity/polarizability values observed in the ternary mixture compared to neat IL or aqueous methanol.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Mwadham M. Kabanda, Indra Bahadur
Summary: A theoretical study investigated the solute-solvent interactions between 1-ethyl-3methyl-imidazolium ([EMIM]+) dicyanamide ([DCA]-) ionic liquid (IL) and traditional molecular solvents (water, methanol, and chloroform). The study revealed strong interactions between the IL and co-solvents at nearly all possible interaction sites, with polar solvents showing stronger interactions compared to nonpolar solvents.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Agricultural Engineering
Maria Catalina Quesada-Salas, Marie E. Vuillemin, Justine Dillies, Rebecca Dauwe, Loubna Firdaous, Muriel Bigan, Virginie Lambertyn, Dominique Cailleu, Arash Jamali, Renato Froidevaux, Eric Husson, Catherine Sarazin
Summary: Pre-treatment of Miscanthus x giganteus with the ionic liquid 1-ethyl-3-methylimidazolium acetate ([Emim] [OAc]) followed by enzymatic hydrolysis and oxidative depolymerization efficiently produced monomeric sugars and selected phenolic intermediates. The liquid fractions yielded high yields of monomeric sugars (>80%), while a solid fraction enriched with lignin (>50% w.w(-1)) was obtained. The release of phenolic monomers was identified and quantified during [Emim][OAc]-pretreatment. This strategy offers a promising platform for the production of free p-hydroxybenzaldehyde.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Chemistry, Physical
Bruno Zezere, Joao Iglesias, Ines Portugal, Jose R. B. Gomes, Carlos Manuel Silva
Summary: This study investigates the diffusivity of quercetin in two compressed liquid cosolvents (ethanol and ethyl acetate) as alternatives to harmful organic compounds. The research highlights the impact of temperature, pressure, and hydrodynamic coordinates on diffusion coefficients, and discusses the unreliability of predicting equations for D-12 data. Various models are used to fit the data, with differences observed in the accuracy of predictions.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Polymer Science
Muhammad Shahid Latif, Abul Kalam Azad, Asif Nawaz, Sheikh Abdur Rashid, Md. Habibur Rahman, Suliman Y. Al Omar, Simona G. Bungau, Lotfi Aleya, Mohamed M. Abdel-Daim
Summary: Transdermal drug delivery systems (TDDSs) are innovative methods for drug delivery through the skin, aiming to achieve systemic effects. The study focused on designing and optimizing methotrexate-loaded transdermal patches with different concentrations of ethyl cellulose (EC) and hydroxypropyl methyl cellulose (HPMC) for local management of psoriasis. The F5 formulation showed 82.71% sustained drug release and non-Fickian diffusion, with good stability for 180 days.
Article
Biochemistry & Molecular Biology
Coraline Chartier, Sytze Buwalda, Helene Van Den Berghe, Benjamin Nottelet, Tatiana Budtova
Summary: Highly porous chitosan-based materials were prepared using different methods to tune their morphology and properties. The absorption capacity of chitosan cryogels was found to be higher than that of chitosan aerogels.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Engineering, Chemical
Nur Amalina Ramli, Fatmawati Adam, Khairatun Najwa Mohd Amin, Adibi M. Nor, Michael E. Ries
Summary: In this study, hydroxypropyl methylcellulose (HPMC) was used as a reinforcing agent to improve the mechanical properties and thermal stability of carrageenan hard capsules. The results showed that increasing HPMC concentration significantly enhanced the tensile strength, elongation at break, and loop strength of the capsules. Molecular interaction analysis indicated the formation of intermolecular hydrogen bonding between carrageenan and HPMC. This research provides new possibilities for the application of carrageenan-HPMC hard capsules as an alternative to gelatin.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Katherine S. Lefroy, Brent S. Murray, Michael E. Ries
Summary: This study demonstrates a novel approach to modify cellulose properties and stabilize emulsions using ionic liquid (IL). The cellulose is dissolved and reprecipitated in the presence of oil to form hydrophobic cellulose microgels (CMGs). By employing a bottom-up approach and high-pressure homogenization (HPH), the size of CMGs is drastically reduced, leading to more stable water-in-oil (W/O) emulsions.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Applied
Yunhao Liang, Michael E. Ries, Peter J. Hine
Summary: This study establishes three methods to explore the dissolution kinetics of cellulosic fibers in a specific ionic liquid. By analyzing the microscopic images of processed samples and comparing the temperature, it is found that the dissolution follows an Arrhenius behavior. The study also develops a new method to determine the swelling ratio and water content in different regions of the processed samples.
CARBOHYDRATE POLYMERS
(2022)
Article
Engineering, Manufacturing
Ashley Victoria, Michael Edward Ries, Peter John Hine
Summary: This study successfully produced cellulose composites with excellent mechanical properties by improving the preparation method. The addition of interleaved film improves the strength and peel strength of the composites, and optimizing the solvent combination further enhances the mechanical properties of the composites.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Nur Amalina Ramli, Fatmawati Adam, Khairatun Najwa Mohd Amin, Noor Fitrah Abu Bakar, Michael E. Ries
Summary: Improving the mechanical and thermal properties of carrageenan biocomposite is crucial for its use as a hard capsule material. By incorporating carboxymethyl sago starch (CMSS), the intermolecular hydrogen bonding between carrageenan and CMSS was established, leading to increased strength and thermal stability of the biocomposite film. The findings suggest that CMSS is a promising alternative to gelatin-based hard capsules.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Applied
Yunhao Liang, Michael E. Ries, Peter J. Hine
Summary: The pyrolysis kinetics of cellulosic fibres, specifically a natural cotton yarn (NCY) and a mercerized cotton yarn (MCY), were investigated using a modified first order global analysis method (FOG) and thermogravimetric analysis (TGA). The results showed that the intrinsic pyrolysis activation energy of NCY and MCY was independent of heating rate and approximation used, with average values of 153 +/- 2 kJ/mol and 192 +/- 7 kJ/mol, respectively. The difference in chemical composition and crystalline structure were hypothesized to be the reasons for the different values. This study provides a new approach for studying the pyrolysis kinetics of biomass and factors influencing their pyrolytic behavior.
CARBOHYDRATE POLYMERS
(2023)
Review
Chemistry, Physical
James A. King, Xin Zhang, Michael E. Ries
Summary: This review focuses on the structure and properties of silk-based composites, with a particular emphasis on employing the time-temperature superposition principle to reveal the kinetics of the formation process. A variety of applications derived from silk-based composites will be explored, and the benefits and constraints of each application will be presented and discussed.
Article
Materials Science, Paper & Wood
Fatimah A. Albarakati, Peter J. Hine, Michael E. Ries
Summary: This study investigated the dissolution rate of flax fibers in the ionic liquid [C2mim][OAc] with the addition of water. The addition of even small amounts of water was found to significantly decrease the speed of dissolution. The measurement of the activation energy for the dissolution of flax fiber showed that the hypothetical dry ionic liquid could dissolve cellulose 23% faster than the ionic liquid as received.
Article
Materials Science, Paper & Wood
Maer Alanazi, Michael E. Ries, Peter J. Hine
Summary: Wide-angle X-ray diffraction (WAXS) and mechanical testing techniques were used to investigate the dissolution process of a viscose rayon multifilament yarn in an ionic liquid. The dissolution involved the regeneration of cellulose fibres and the formation of a matrix phase. The growth of the dissolved matrix volume fraction and the decrease in Young's modulus followed a time-temperature superposition behavior. The results from WAXS measurements and mechanical testing were consistent with the Voigt upper bound parallel Rule of Mixtures.
Article
Materials Science, Paper & Wood
Nora S. Alrefaei, Peter J. Hine, Michael E. Ries
Summary: This study investigated the dissolution of hemp yarns in an ionic liquid and found that the dissolution process is affected by time and temperature. The yarns were observed to swell in water, and the swelling ratios of different regions were measured. Additionally, the study discovered that the growth of the coagulated region follows a diffusion process, which can be modeled mathematically.
Article
Materials Science, Paper & Wood
Ashley Victoria, Peter John Hine, Keeran Ward, Michael Edward Ries
Summary: In this study, statistical design of experiments (DoE) was used to optimize all cellulose composites (ACCs) made from cotton textile and interleaf films. The optimized samples showed improved mechanical properties and density, highlighting the potential of DoE for understanding and optimizing ACC processes.
Article
Materials Science, Composites
Xin Zhang, Michael E. Ries, Peter J. Hine
Summary: Single layer woven all-silk composites (ASCs) were prepared using the ionic liquid 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]), with the dissolution carried out under different times and temperatures. The dissolution and coagulation of silk matrix were observed in both fibre directions, with a thicker matrix layer along the warp direction. Analysis of the collected intensity distribution curves revealed the average crystal orientation through radial integration. Time-temperature superposition (TTS) and linear mixing rule were used to determine the dissolution activation energy (Ea) and coagulated matrix (Vm).
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Review
Green & Sustainable Science & Technology
Chigozie Charity Okwuwa, Fatmawati Adam, Farhan Mohd Said, Michael E. Ries
Summary: Organic solvents pose risks to the environment and human health, leading to the search for green alternatives such as deep eutectic solvents (DESs). DESs have shown significant progress in various industries, but further research is needed to overcome challenges in the field of edible biocomposites.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Physical
Mazin Nasralla, Harrison Laurent, Daniel L. Baker, Michael E. Ries, Lorna Dougan
Summary: This study investigates the impact of TMAO and urea on water structure and finds that TMAO enhances the total hydrogen bonding in water, which can be neutralized by urea. Urea has little effect on the strength of water's hydrogen bonding network and the dynamics of water molecules. Weak interactions are found between TMAO and urea. These results shed light on the mechanism of TMAO as a protective osmolyte and its interaction with urea.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
