Article
Chemistry, Multidisciplinary
Emil Petrescu, Cristina Cirtoaje
Summary: By using a proper dispersion of nanotubes in the liquid crystal sample and a theoretical model, the dielectric permittivities of multiwalled carbon nanotubes are calculated, and their influence on the Freedericksz transition threshold is discussed.
Article
Chemistry, Physical
S. J. Shivaraja, R. K. Gupta, V Manjuladevi
Summary: Polymer dispersed liquid crystals (PDLCs) containing ODA-SWCNT dispersions were prepared and their electro-optical properties were studied. Compared to pure PDLCs, the PDLCs with ODA-SWCNT dispersions showed a shorter response time, lower threshold voltage, higher optical transparency, and better image sharpness in the ON-state.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Materials Science, Multidisciplinary
Meng Lan, Xiaohua Jia, Rui Tian, Jin Yang, Dan Shao, Sizhe Wang, Yong Li, Lei Feng, Jiayin Yuan, Miao Zhang, Haojie Song
Summary: A highly concentrated carbon nanotube (CNT) dough is achieved by using ionic liquid crystal (ILC) as auxiliaries. The CNTs are successfully transformed into a highly processable dough with excellent properties, such as electrical conductivity, flame retardancy, and redispersibility, even after long-term storage. The CNT dough shows self-healing and reshaping capabilities, and can be easily processed into various forms. Furthermore, hybrid nanocomposite papers with excellent photothermal conversion and Joule heating properties are realized. The redispersible CNT doughs presented in this study have the potential to revolutionize CNT-based architectures and promote the large-scale application of CNTs.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Electrochemistry
Ahmed Galal, Yousef M. Ahmed, Mansour H. M. Ahmed, Nada F. Atta
Summary: Favipiravir is an antiviral drug used for treating pulmonary infections and lung inflammation in COVID-19 patients. An electrode modified with ILCs and CNTs has been developed for sensitive and selective detection of Favipiravir in human serum and medications. The electrode allows for the preconcentration of the drug on its surface, with detection and quantification limits for Favipiravir in blood serum of 0.0161 and 0.119 μmol L-1 respectively. The sensor is also effective for concurrent determination of multiple drugs used for virus treatment or other chronic diseases.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Zongcheng Miao, Zuhui Shi, Shiyan Gao, Cheng Ma, Dong Wang, Lei Wang
Summary: Polymer-dispersed liquid crystal (PDLC) films were prepared using the polymerisation-induced phase separation (PIPS) method with a mixture of prepolymer, liquid crystal, and reticular nanofibre films containing multi-walled carbon nanotubes (MWCNT). The electro-optical properties of PDLC were significantly improved by modifying the pore size pairs of the polymer network and introducing loaded MWCNT reticular nanofibre films into the liquid crystal mixture. The resulting PDLC with improved electro-optical properties and resistance to ageing has promising technological applications in optical windows, displays, energy storage, and flexible devices.
Article
Engineering, Environmental
Hussein K. Srour, Nada F. Atta, Mohamed W. Khalil, Ahmed Galal
Summary: This study introduces a newly developed composite modifier consisting of nanoparticles, carbon nanotubes, and ionic liquid crystals for electrochemical treatment. The modified electrode shows outstanding catalytic current for urea oxidation. The inclusion of ionic liquid crystals and the change in the carbon-based component significantly improve the performance of the catalyst.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Polymer Science
Camila Mouta Caldas, Bluma Guenther Soares, Tamara Indrusiak, Guilherme Mariz Oliveira Barra
Summary: By modifying PMMA nanocomposites and incorporating GNP with different fluorinated ionic liquids, composites with high thermal stability and conductivity can be obtained, showing excellent absorption properties in terms of microwave absorption.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
S. J. Shivaraja, Mudit Sahai, R. K. Gupta, V. Manjuladevi
Summary: This work presents the results of electro-optical switching properties in polymer dispersed liquid crystal (PDLC) devices for switchable window applications. PDLC cells were prepared by mixing octadecylamine functionalized single-walled carbon nanotubes (ODA-SWCNT) nanocomposites of liquid crystals (LC) and acrylate-based monomer using polymerization induced phase separation method. The important parameters of the switchable devices, such as threshold voltage, switching voltage, response time, contrast ratio, and effective refractive index, were investigated. The experimental results show that PDLC cells prepared with 0.05 wt% ODA-SWCNT nanocomposites exhibit lower threshold and driving fields compared to those prepared with pure LC. Additionally, a distinct optical phenomenon (frequency doubling) was observed for PDLC cells prepared with 0.03 and 0.05 wt% ODA-SWCNT nanocomposites. The physical mechanism behind this unique optical behavior is discussed. Prototype PDLC devices for switchable window applications were also tested, and it was found that the PDLC prepared with 0.05 wt% ODA-SWCNT nanocomposites of LC shows improved clarity and opacity compared to those prepared with pure LC and lower concentrations of ODA-SWCNT.
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
Polymer Science
Meina Yu, Jianjun Xu, Tianyang Wang, Luoning Zhang, Huiyun Wei, Cheng Zou, Yanzi Gao, Huai Yang
Summary: This study investigates the impact of chain structure on the electro-optical performance of PDLC films. It is found that adjusting the alkyl chain length can improve the contrast ratio, while introducing branched chains can compensate for the increased driving voltages. The optimized PDLC film achieves a high contrast ratio and shows two distinct states: highly transparent state and strong scattering state.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Patricia C. Vargas, Claudia Merlini, Sebastien Livi, Johnny de Nardi Martins, Bluma G. Soares, Guilherme M. O. Barra
Summary: The non-covalent modification of CNTs and xGnP with ILs had a significant impact on the PU matrix. The electrical conductivity and EMI SE of the composites were influenced by the loading, dispersion of the fillers, and the nature of IL. Composites with IL105 showed higher electrical conductivity and EMI SE due to better interaction with the PU matrix compared to composites with IL101.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Physical
Yunyun Ji, Fei Fan, Ziyang Zhang, Jierong Cheng, Shengjiang Chang
Summary: This study presents a strategy to overcome the challenges of liquid crystal materials in the THz regime by using a super-aligned carbon nanotube film as both transparent electrodes and the aligning layer. The LC molecules are uniformly aligned along the orientation direction of the CNT film, enabling active THz polarization conversions.
Article
Chemistry, Physical
Olawale Monsur Sanusi, Abdelkibir Benelfellah, Lazaros Papadopoulos, Zoi Terzopoulou, Lamprini Malletzidou, Isaak G. Vasileiadis, Konstantinos Chrissafis, Dimitrios N. Bikiaris, Nourredine Ait Hocine
Summary: In this study, a hybrid nanofiller of Mt and MWCNT was successfully prepared and incorporated into PLA matrix to improve the material properties. Physicochemical studies and structural analyzes revealed strong hybrid-polymer interaction and synergy between nanoclay and carbon nanotubes. Thermal characterizations and mechanical properties testing demonstrated that the Mt/MWCNT hybrid nanofillers effectively restricted the motion of PLA segments and enhanced the mechanical performance of the polymer matrix.
APPLIED CLAY SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Khadidja Taleb, Salima Saidi-Besbes, Isabelle Pillin, Yves Grohens
Summary: Biocomposites based on PBS and OMt were prepared by melt blending process. Gemini surfactant-modified organoclays showed a uniform dispersion and exfoliation in the PBS matrix, leading to improved properties. Adding a small amount of PBS/OMt significantly reduced the water vapor permeability, making it a promising material for food packaging applications.
Article
Chemistry, Multidisciplinary
Hannah Collins, Jiacheng Liu, Lingyu Yang, Jennifer L. Schaefer
Summary: Advancements in energy storage technology are crucial for sustainable improvements in electrified transportation and power distribution. This study investigates the effects of anion density and cation coordination sites on blended electrolytes for rechargeable lithium-ion batteries using organic ionic crystals and ionic liquid crystals as promising materials.
APPLIED SCIENCES-BASEL
(2022)
