Article
Biochemistry & Molecular Biology
Qihan Sun, Jiani Gong, Yujia Sun, Yao Song, Changyao Liu, Baocai Xu
Summary: Typically, the addition of salts or additives is required for the formation of vesicles. However, in the case of catanionic surfactants, vesicles can spontaneously form upon dilution of the micellar solutions. Our study explores the spontaneous vesicle-to-micelle transition in catanionic surfactant systems and provides insights into the changes occurring at the interface. This study may have implications for the design of morphologies in catanionic and other surfactant systems.
Article
Biotechnology & Applied Microbiology
Li Sun, Jierong Liang
Summary: This study presents a modeling study on the solubilities of hydrogen sulfide in water and aqueous sodium salt solutions, proving that the electrolyte version of the equation of state model can accurately calculate the solubilities over wide ranges of temperature, pressure, and salt molality, which is crucial for gas exploitation and geological storage.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Chemistry, Multidisciplinary
Bo Ning, Yan Wang, Mi Zhang, Yanyun Bai, Xiumei Tai, Wanxu Wang, Guoyong Wang
Summary: A new surfactant FEP-Na was synthesized for use in a 50% ethanol-water mixed system, showing good foam properties. High concentration solutions with high surface activity have lower foam stability, and the phenomenon of bubble burst is dominated by coalescence. This research provides insights into the mechanism of foam stability in the ethanol-water mixed system at a concentration of 50%.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
A. Khaleghi Dehghan, M. Manteghian, S. M. Sadrameli
Summary: Sodium sulfate decahydrate is a significant salt hydrate used for phase change thermal energy storage. Experimental evaluation of kinetic parameters and thermodynamic properties of the salt solution was conducted using a novel constant temperature experimental method. The data showed consistency in solubility, and analysis was done using classical nucleation theory and secondary nucleation models.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Physics, Applied
Himanshi Singh, Sugam Kumar, Vinod K. Aswal
Summary: This study investigates the evolution of phase behavior and interactions between anionic silica nanoparticles, surfactants, and salt. The results show that the phase behavior can be controlled by the concentration of salt and the type of surfactants, providing insights into the design of nanoparticle-surfactant solutions.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Zhenhuan Dong, Lingqi Kong, Zhen Liu, Anming Yang
Summary: The solubility of sodium theophylline salt in water and aqueous sodium hydroxide solutions was investigated. The experimental results showed that the solubility increased with temperature and decreased with higher concentrations of NaOH. The correlation analysis revealed that the modified Apelblat equation provided the best fit. The obtained solubility data and correlation results are important for the cooling crystallization, separation, and purification of sodium theophylline, as well as for the research and development of sodium theophylline and caffeine production.
JOURNAL OF CHEMICAL RESEARCH
(2023)
Article
Engineering, Chemical
Jiashu Liu, Shengnan Zhao, Song Song, Haifeng Cong, Wei Luo, Tong Ding, Ye Tian, Xingang Li
Summary: In this study, a new strategy combining salt-promoted phase separation and heteroazeotropic distillation was reported to enhance water removal and achieve efficient LD synthesis.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Yuhuan Deng, Bin Liang, Xingtang Liang, Songlin Fan, Yanjuan Zhang, Yanzhen Yin, Huayu Hu, Zuqiang Huang, Yuben Qin
Summary: The study utilized mechanical activation-metal salt technology to pretreat chitin and improve its solubility, with FeCl3 showing a particularly good synergistic effect. The MAFCCT-treated chitin exhibited a significant decrease in crystallinity and a notable increase in solubility in NaOH/urea solution.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Yanrong Cheng, Wenlin Xu, Yaqiong Wang, Xia Guo
Summary: In this study, a water-soluble calixarene, p-sulfonatocalix[4]arene (SC[4]), was used as an adjuvant to improve the performance of the PEG 600/(NH4)(2)SO4 ATPS through multiple interactions. It was found that the formation of the ATPS was enhanced and the transfer of the target molecules into the polymer phase was promoted when SC[4] and SC[4]/imidazole ionic liquid ([C(n)mim]Br) complex were used as the adjuvants.
Article
Chemistry, Multidisciplinary
Yue Zheng, Cole R. Davis, John A. Howarter, Kendra A. Erk, Carlos J. Martinez
Summary: In this study, the HLD framework was used to predict spontaneous emulsification with a mixture of Span-80 and SLES surfactants. Emulsion formation was influenced by the HLDmix range, resulting in either o/w or w/o emulsions, with high spontaneity observed when HLDmix was close to 0.
Article
Chemistry, Multidisciplinary
Amir Dashti, Farid Amirkhani, Amir-Sina Hamedi, Amir H. Mohammadi
Summary: In this study, four hybrid machine learning methods were developed to evaluate CO2 and AAs equilibrium data, with RBF-NN showing promising performance in estimating the CO2 loading capacities of AAs aqueous solutions, surpassing other models. The accuracies of the models' results were verified through graphical and statistical analyses.
Article
Chemistry, Physical
Mohammad Mehdi Zarei, Mostafa Hosseini, Amir H. Mohammadi, Ali Moosavi
Summary: A new model based on CSA-LSSVM was developed to accurately predict the solubility of various forms of calcium sulfate in different aqueous solutions. The reliability of the model was supported by experimental data and it demonstrated superiority in various mixed solutions.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Chemical
Arnaud Delanney, Alain Ledoux, Lionel Estel
Summary: Aqueous solutions of potassium amino acid salts have the potential to capture carbon dioxide, but accurately predicting their viscosity is crucial for process design. The study builds an artificial neural network model to predict the viscosity of different potassium amino acid salt solutions and determine the influence of functionalized groups on dynamic viscosity.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Physical
Sakshi Bhagat, Samanwita Pal
Summary: In this study, heteronuclear NMR approaches were used to investigate the solution behavior of l-alanine in the presence of lithium salts. The effect of different salts on the dynamics and solvation of alanine was examined using H-1, Li-7, and C-13 nuclei. The study revealed the solvation shell of Li ion depending on the anionic counterpart.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Engineering, Chemical
Grzegorz Tyl, Juliusz Kondracki, Magdalena Jasinska
Summary: This paper examines the aggregation of small solid particles in the perikinetic and orthokinetic regimes through solving the convection-diffusion equation for the pair probability function of the particles. It is found that simplified collision kernels from literature are applicable within certain Peclet number ranges. Additionally, the influence of flow patterns and process parameters on aggregation rate is discussed.
CHEMICAL AND PROCESS ENGINEERING-INZYNIERIA CHEMICZNA I PROCESOWA
(2021)
Article
Chemistry, Medicinal
Ana Teresa Silva, Isabel S. Oliveira, Joana Gomes, Luisa Aguiar, Diana Fontinha, Denise Duarte, Fatima Nogueira, Miguel Prudencio, Eduardo F. Marques, Catia Teixeira, Ricardo Ferraz, Paula Gomes
Summary: By combining room-temperature ionic liquids derived from primaquine and cinnamic acids with natural fatty acids, novel surface-active ionic liquids with enhanced antimalarial activity have been developed, offering new perspectives for the cost-effective recycling of classical drugs.
Article
Chemistry, Physical
Barbara Abreu, Ana Sofia Pires, Andreia Guimaraes, Ricardo M. F. Fernandes, Isabel S. Oliveira, Eduardo F. Marques
Summary: This study investigates the ability of mixed polymer/surfactant (P/S) systems to effectively separate carbon nanotubes (CNTs) in water. The results show that all P/S mixtures have beneficial effects on the dispersibility of CNTs compared to the individual components, with potential synergistic effects. The morphology of the obtained dispersions is characterized, and the interaction mechanisms between the CNTs and P/S mixtures are analyzed using surface tension and zeta potential measurements.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Raquel C. F. G. Lopes, Bruno G. M. Rocha, Ermelinda M. S. Macoas, Eduardo F. Marques, Jose M. G. Martinho
Summary: The development of functional materials with advanced properties is crucial in nanoscience and nanotechnology. Metal nanoclusters and carbon nanomaterial hybrids have emerged as highly attractive materials for imaging, sensing, and catalysis. Metal nanoclusters provide exceptional luminescent and electronic properties, while carbon nanomaterials offer versatility and unique properties that can be utilized for various applications.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2022)
Article
Infectious Diseases
Daniela Araujo, Ricardo Gaspar, Dalila Mil-Homens, Mariana Henriques, Bruno F. B. Silva, Sonia Silva
Summary: This study aimed to investigate the complexation of cationic liposomes with anti-EFG1 2 ' OMe oligomers and evaluate its efficacy in controlling Candida albicans filamentation in vitro and in vivo using a Galleria mellonella model. The results showed that DOTAP-based lipoplexes were able to release the anti-EFG1 2 ' OMe oligomers and inhibit C. albicans filamentation. In vivo, the DOTAP/DOPC 80/20 rho(chg )= 3 formulation was the most effective, enhancing the G. mellonella survival.
Article
Chemistry, Physical
Barbara Abreu, Bernardo Almeida, Pedro Ferreira, Ricardo M. F. Fernandes, Diana M. Fernandes, Eduardo F. Marques
Summary: This study systematically investigates the dispersibility of MoS2, WS2 and MoSe2 in aqueous medium using cationic and anionic dispersants, providing insights on the influence of metal type, chalcogen type, surfactant charge, and concentration on exfoliation and stabilization. The methodology yields well-exfoliated nanosheets with controlled lateral dimension and thickness. Different profiles of dispersibility curves are proposed based on the type and concentration of ionic surfactants.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Environmental
Catarina Costa, Andre Viana, Carla Silva, Eduardo F. Marques, Nuno G. Azoia
Summary: Chemical recycling is an effective method to separate mixed fibers and reduce textile waste. This study focuses on extracting cellulose from mixed textile waste through acid hydrolysis and transforming it into cellulose derivatives. The obtained cellulose derivatives are valuable additives in the textile industry, promoting the concept of a circular economy.
Correction
Chemistry, Medicinal
Ana Teresa Silva, Isabel S. Oliveira, Joana Gomes, Luisa Aguiar, Diana Fontinha, Denise Duarte, Fatima Nogueira, Miguel Prudencio, Eduardo F. Marques, Catia Teixeira, Ricardo Ferraz, Paula Gomes
Article
Biochemistry & Molecular Biology
Isabel S. Oliveira, Sandra G. Silva, Maria Luisa do Vale, Eduardo F. Marques
Summary: This study investigated the aggregation properties of two catanionic mixtures containing biomimetic surfactants derived from serine. One of the mixtures formed vesicles that only existed within a very narrow compositional range, with average diameters of 80 and 300 nm and a bimodal population. These vesicles are promising for application as drug/gene nanocarriers.
Article
Materials Science, Paper & Wood
Catarina Costa, Carla Silva, Eduardo F. Marques, Nuno G. Azoia
Summary: Long-chain cellulose esters (LCCEs) are cellulose derivatives with properties relevant to diverse applications. In this study, LCCEs were evaluated as eco-friendly hydrophobic additives in textiles with different compositions. The LCCE-based formulations were applied using a conventional textile dry-cleaning process. Water-repellent textiles were obtained through sustainable flourine-free compounds, without the need for crosslinkers or pre-treatments.
Article
Materials Science, Paper & Wood
Catarina Costa, Carla Silva, Eduardo F. Marques, Nuno G. Azoia
Summary: The textile industry is interested in developing waterproof, self-cleaning, and stain-resistant clothing and textiles. This study developed fluorine-free formulations based on long-chain cellulose esters, synthesized from recycled cellulose, to enhance hydrophobicity in textiles. These eco-friendly and sustainable formulations provide a simple and effective alternative to current compounds used for water repellency in textiles, with non-toxicity and ease of application.
Article
Biochemistry & Molecular Biology
Catarina Costa, Andre Viana, Isabel S. S. Oliveira, Eduardo F. F. Marques
Summary: Interactions between polymers and surfactants in aqueous solution have significant implications in physical chemistry and industrial applications. By synthesizing two ionic derivatives from recycled cellulose, we explored the interactions of these polymers with different types of surfactants commonly used in the textile industry. The results showed that oppositely charged polymer/surfactant mixtures exhibited strong associations, while similarly charged mixtures showed minimal interactions except for the QC/CTAB system. Furthermore, the P/S mixtures significantly enhanced the hydrophilicity of a hydrophobic textile substrate at lower surfactant concentrations compared to surfactant alone.
Article
Chemistry, Multidisciplinary
Juan L. Paris, Ricardo Gaspar, Filipe Coelho, Pieter A. A. De Beule, Bruno F. B. Silva
Summary: Hybrid core-shell lipid-polycation-nucleic acid nanoparticles (LPNPs) present a unique delivery strategy for nonviral gene therapy. This study proposes a method using fluorescence cross-correlation spectroscopy to investigate the association between the three components of LPNPs. The results demonstrate that cationic lipid shells do not displace polycations or DNA from the polycation-DNA cores, indicating that oppositely charged polyplexes and liposomes are required to form stable LPNPs. The liposome:polyplex number ratio (ρ(N)), previously unknown, is identified as the primary parameter predicting the stability of LPNPs, with ρ(N) ≥ 1 ensuring complete envelopment of every polyplex by a liposome to prevent aggregation of oppositely charged species.
Article
Chemistry, Physical
Dmitriy Moreira, Oren Regev, Nuno Basilio, Eduardo F. Marques
Summary: This study develops a delivery system based on dual light and pH responsive vesicles, which can achieve precise drug release. By adjusting the acid and base conditions and UV irradiation, the release of the drug is successfully controlled, demonstrating the potential application of vesicles as nano-carriers in acidic environments such as tumors.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Meeting Abstract
Cell & Tissue Engineering
Sandra Barata-Antunes, Rui A. Sousa, Bruno F. B. Silva, Antonio J. Salgado
TISSUE ENGINEERING PART A
(2022)
Article
Chemistry, Multidisciplinary
Filipe Coelho, Laura M. Salonen, Bruno F. B. Silva
Summary: Cationic lipid-deoxyribonucleic acid complexes (CL-DNAs) are promising delivery systems for gene therapy applications. The insertion of PEG molecules on the surface of CL-DNAs improves their circulation time, but decreases the rate of endosomal escape. By inserting a pH-cleavable bond, the shedding of PEG can be triggered inside the endosome. The use of the new hemiacetal-based methoxy PEG lipids in CL-DNAs shows increased stability and transfection efficiency.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Physical
Yiping Yin, Zhe Wang, Hua Zou
Summary: This study presents a novel method for preparing dimpled polymer-silica nanocomposite particles using interfacial swelling-based seeded polymerization. The optimized conditions allow for a relatively high percentage of dimpled particles to be achieved.
Article
Chemistry, Physical
Brenden D. Hoehn, Elizabeth A. Kellstedt, Marc A. Hillmyer
Summary: Porous materials with nanometer-scale pores have important applications as nanoporous membranes. In this study, ABA triblock copolymers were used as precursors to produce nanoporous polymeric membranes (NPMs) in thin film form by degrading the end blocks. Polycyclooctene (PCOE) NPMs with tunable pore sizes were successfully prepared using solvent casting technique. Oxygen plasma etching was employed to improve the surface porosity and hydrophilicity of the membranes. This study provides a straightforward method to produce tough NPMs with high porosity and hydrophilic surface properties.
Article
Chemistry, Physical
Vladislav S. Petrovskii, Stepan I. Zholudev, Igor I. Potemkin
Summary: This article investigates the behavior of linear and ring polypeptide chains in aqueous solution and explores the properties of the complexes formed by these chains with oppositely charged surfactants. The results demonstrate that the complexes of linear supercharged unfolded polypeptides and the corresponding surfactants exhibit impressive adhesive properties.
Article
Chemistry, Physical
Merve Cevik, Serkan Dikici
Summary: Cardiovascular diseases are a leading cause of death globally, and vascular grafts are a promising treatment option. This study focuses on tissue-engineered vascular grafts (TEVGs) using decellularized parsley stems as a potential biomaterial. The decellularized parsley stems showed suitable properties for TEVGs, providing a suitable environment for human endothelial cells to form a pseudo endothelium. This study showcases the potential of using parsley stems for TEVGs.
Article
Chemistry, Physical
Gustavo A. Vasquez-Montoya, Tadej Emersic, Noe Atzin, Antonio Tavera-Vazquez, Ali Mozaffari, Rui Zhang, Orlando Guzman, Alexey Snezhko, Paul F. Nealey, Juan J. de Pablo
Summary: The optical properties of liquid crystals are typically controlled by electric fields. In this study, we investigate the effects of microfluidic flows and acoustic fields on the molecular orientation and optical response of nematic liquid crystals. We identify several previously unknown structures and explain them through calculations and simulations. These findings hold promise for the development of new systems combining sound, flow, and confinement.
Article
Chemistry, Physical
Xinjun Wu, Xin Guan, Shushu Chen, Jiangpeng Jia, Chongyi Chen, Jiawei Zhang, Chuanzhuang Zhao
Summary: This research presents a novel shape memory hydrogel with a remodelable permanent shape and programmable cold-induced shape recovery behavior. The hydrogel is prepared using specific treatment methods to achieve shape fixation by heating and shape recovery by cooling. Additionally, deformable devices can be obtained by assembling hydrogel blocks with different concentrations.
Article
Chemistry, Physical
Rebecca Hengsbach, Gerhard Fink, Ulrich Simon
Summary: This study examines the properties of DNA functionalized pNipmam microgels and pure pNipmam microgels at different concentrations of sodium chloride and in PBS solutions using temperature dependent H-1-NMR measurements. The results show that DNA modification affects the volume phase transition temperature and the addition of salt and PBS further enhances this effect.
Article
Chemistry, Physical
Ningyi Li, Junhong Li, Lijingting Qing, Shicheng Ma, Yao Li, Baohui Li
Summary: This paper investigates the self-assembly behavior of colloids with competing interactions under spherical confinement and finds that different ordered structures can be formed under different sized spherical confinements. Moreover, more perforated structures are formed in smaller spheres.