Article
Chemistry, Multidisciplinary
Mohammad Alroaithi, Wei Xu
Summary: A PPC nanocomposite with highly exfoliated nanoclay was prepared through a solution intercalation process. The highly exfoliated nanoclay contributed to a viscosity reduction and a slight reduction in molecular weight of PPC, with the minimum or critical concentration of nanoclay found to be between about 0.5% and 2.0%. The PPC nanocomposites with lower viscosity showed excellent precursors for making PU coating materials, which exhibited higher anticorrosive properties compared to non-modified PU coatings.
Article
Chemistry, Analytical
Periyasamy Sundaresan, Tae Yoon Lee
Summary: In this study, a facile synthetic route was developed to obtain an exfoliated graphite-supported cobalt ferrite nanocomposite. The nanocomposite was used to fabricate electrochemical sensors for the detection of DCF in human urine samples. The sensor exhibited excellent sensitivity and a low detection limit.
MICROCHEMICAL JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Lili Xu, Kunpeng Wang, Jun Wang, Darrell Alec Patterson
Summary: The study developed PANI/EG composite membranes with stimuli responsive properties and good electrical conductivity. The membranes showed efficient fouling removal ability under applied electrical potential. The dynamic response and recovery of the membranes to potential changes suggest potential applications in fouling control.
Article
Chemistry, Physical
Qian Wu, Yinghong Zhu, Haojie Duan, Lin Zhu, Yuting Zhang, Hongqiang Xu, Ishioma Laurene Egun, Haiyong He
Summary: In this study, a Si@EG composite was prepared using liquid phase mixing and elevated temperature solid phase method, while polyaniline was synthesized to coat the surface of the composite. The coated composite effectively alleviates the volume expansion effect of silicon electrodes and forms a conductive network. The electrochemical properties of Si@EG@p-PANI were tested and it showed excellent stability and reversibility with a high initial specific capacity and maintenance of capacity after cycling.
Article
Engineering, Multidisciplinary
Balint Morlin, Katalin Litauszki, Roland Petreny, Akos Kmetty, Laszl Meszaros
Summary: This research found that the presence of nanoparticles, especially halloysite, in polymeric foams can increase the specific compressive strength, with the use of 3% halloysite showing the most significant improvement. Additionally, the addition of nanoparticles reduced the standard deviation of this ratio and decreased the average cell diameter compared to the reference material.
Article
Energy & Fuels
Qi Li, Ye Tan, Chuan -Huang Lin, Yu-Hao Ning, Lin-Ping Yu, Zhong Cao, Li-Xian Sun, Ju-Lan Zeng
Summary: This study proposed a new method and prepared a series of multifunctional sugar alcohol@polyaniline microencapsulated phase change materials (MePCMs) with thermal conductive and photothermal conversion enhancement fillers. The prepared MePCMs showed good anti-leakage performance, high latent heat storage capacity, enhanced thermal conductivity, and excellent photothermal conversion performance.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Hong-Yue Zhu, Qi-Bo Wang, Jian-Zhong Yin
Summary: A method using high-pressure supercritical carbon dioxide to mix with graphite for graphene preparation was studied. The optimal conditions were found to be mixing at 45 MPa for 48 hours followed by centrifugation for 30 minutes, resulting in the highest concentration of graphene. The number of layers and lateral dimensions of graphene sheets could be controlled by adjusting process parameters.
Review
Chemistry, Inorganic & Nuclear
Leelakrishna Saikam, P. Arthi, Senthil Bakthavatchalam, Shanmugam Mahalingam
Summary: Carbon nanomaterials have become crucial solutions for two important issues in modern society, namely environmental pollution and energy storage, due to their high surface area, electrical conductivity, thermal stability, and electrochemical stability.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Polymer Science
Antonio Montes, Diego Valor, Laura Delgado, Clara Pereyra, Enrique Martinez de la Ossa
Summary: This study focuses on the development of three-dimensional scaffolds composed of conductive and non-conductive polymers to overcome the rigidity and brittleness of conjugated polymers in medical applications. The best operating conditions were determined through experiments, and various properties of the scaffolds were evaluated.
Article
Chemistry, Physical
D. D. L. Chung
Summary: Carbon materials in the graphite allotrope family, such as exfoliated graphite (EG), exhibit high electromagnetic interference (EMI) shielding performance. The cellular structure and preferred orientation of the carbon layers in EG contribute to its resilience perpendicular to the plane of preferred orientation, which is beneficial for EMI gasketing.
Article
Chemistry, Multidisciplinary
Zahra Rezaee, Toraj Mohammadi, Omid Bakhtiari
Summary: In this study, nanocomposite membranes with uniform dispersion of amorphous PANI nanofibers were prepared using different concentrations of Pebax 1657 and PANI. The membranes exhibited defect-free structures and lower crystallinities. As the nanofiber loading increased, the CO2 permeability and selectivity of the membranes increased, surpassing the Robeson upper bound limit and approaching the values in 2008. The CO2 permeability and ideal CO2/CH4 selectivity of the nanocomposite membrane loaded with 10 wt.% PANI nanofibers increased to 121.2 Barrer and 33, respectively, showing increments of 64% and 40%.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Physical
Shiyu Hou, Shuaijie He, Tianle Zhu, Jihui Li, Liqiang Ma, Hongda Du, Wanci Shen, Feiyu Kang, Zheng-Hong Huang
Summary: The traditional method of exfoliated graphite production faces challenges in energy conservation and pollution abatement. A new preparation method under room temperature conditions has been developed to acquire high-performance exfoliated graphite with significant potential for industrial applications.
JOURNAL OF MATERIOMICS
(2021)
Article
Chemistry, Physical
Rahul Navik, Huijun Tan, Zhiyuan Liu, Qixuan Xiang, Yaping Zhao
Summary: A highly-efficient and green exfoliation process for graphene was developed using high-energy planetary ball-milling coupled with supercritical carbon dioxide. The yield of graphene reached up to 59% and the exfoliated flakes were highly dispersible in organic solvents. This new process has great potential for commercial applications.
Article
Engineering, Manufacturing
Wen-hua Xu, Ling-cao Tan, Sen Qin, Yue He, Ting Wu, Jin-ping Qu
Summary: A one-step melt mixing strategy is developed based on the synergism of steam explosion and alternating convergent-divergent flow to fabricate high-performance HDPE/EG nanocomposites within 4 minutes. The nanocomposites feature excellent mechanical and electrical properties, with low dielectric loss even with increased EG content, showing potential for 5G communication materials.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Engineering, Environmental
Maher T. Alshamkhani, Lutfi Kurnianditia Putri, Pooya Lahijani, Keat Teong Lee, Abdul Rahman Mohamed
Summary: In this study, an electrochemically exfoliated graphene/graphite carbon nitride ((EG)/g-C3N4) heterojunction photocatalyst was synthesized for CO2 photoreduction to methane. The best-performing photocatalyst (0.075 EG-CN) showed a significant enhancement in CH4 production with 98.6% selectivity after 6 hours of light irradiation compared to pure CN. The developed photocatalyst exhibited high stability after consecutive cycles of CO2 photoreduction to CH4.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
P. Belmonte, J. M. Garcia-Vargas, J. F. Rodriguez, I. Garrido, M. T. Garcia, M. J. Ramos
Summary: In this study, four polythiourethane films with different types of polyols and isocyanates were synthesized, characterized, and foamed. The results showed that the type of isocyanate greatly influenced the crystallinity and stiffness of the polymers, while the type of polyol modified the FT-IR spectra and the decomposition curve of the material with temperature. Furthermore, the choice of isocyanate also affected the properties of the foams obtained from the polymeric material.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Xutao Zhu, Jianguo Yan, Shouchun Liu, Fengling Zhu
Summary: This study experimentally assessed the hydrodynamic characteristics of supercritical-pressure R134a in a horizontal circular tube. It was found that the hydrodynamic characteristic curve of R134a under supercritical pressure does not have a negative-slope region but a transition region. The transition region becomes more evident with increasing heat flux, while it weakens with increasing pressure and inlet temperature. Moreover, the onset of the transition region shifts in the direction of high mass flow rate with increasing heat flux.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Stefania Mottola, Iolanda De Marco
Summary: In this study, corticosteroids were micronized with cyclodextrin using Supercritical Assisted Atomization (SAA), resulting in spherical micrometric particles with improved dissolution time.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Honghai Liu, Yu Xie, Zhilan Li, Xiaokai Zhang
Summary: This study compared the effects of supercritical carbon dioxide dewatering (SCD) and conventional kiln drying (CKD) at a temperature of 55 degrees C on the dewatering rate, moisture transfer and distribution, shrinkage, and stress characteristics of bamboo strips. The results showed that SCD had a faster dewatering rate and lower shrinkage compared to CKD, but was less effective in reducing drying stress in bamboo.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Tahmasb Hatami, Ozan N. Ciftci
Summary: This study fills the gap in previous research by establishing a hierarchy of significance for factors affecting SFE profitability, providing a deeper understanding of how technical and economic factors impact profitability. The findings highlight that the SFE facility becomes profitable when the extractor capacity surpasses 42 L.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Tingshan Guo, Chuang He, Zhiyuan Liang, Qinxin Zhao
Summary: The initial oxidation behavior of Fe10Cr and Fe20Cr alloys in supercritical H2O and supercritical CO2 with O2 has been investigated. The results show that O2 has the highest adsorption energy on FeCr alloys and reacts faster than H2O and CO2.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Vikash Chandra Roy, Jin-Seok Park, Ahmed Redwan Haque, Md Sadek Ali, Hee-Jeong Lee, Byung-Soo Chun
Summary: This research aimed to valorize brewery spent grain (BSG) using subcritical water hydrolysis (SWH) modified by six different natural deep eutectic solvents (DES) and determining their bipotentialities. The findings showed that BSG hydrolysates obtained through DES-induced SWH contained high levels of sugars, proteins, flavonoids, phenolic compounds, and essential amino acids. The hydrolysates also demonstrated antimicrobial activities, and the presence of bioactive compounds was confirmed through FT-IR analysis. This comprehensive profiling of bioactive compounds from BSG using DES-mediated SWH can contribute to the efficient valorization of BSG for industrial purposes.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Kailiang Zhang, Hanyu Wang, Tong Liu, Zhu Wang, Lvxing Wang, Ping Fan, Feng Chen, Mingqiang Zhong, Bozhen Wu, Shanqiu Liu, Jintao Yang
Summary: This study investigates the influence of foam cell structure on the electromagnetic interference shielding performance of conductive polymer composite foam. The results suggest that foamed composites exhibit improved EMI shielding performance, and bimodal cell foams have higher electric conductivity but lower EMI shielding compared to uniform cell foams.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Jaromir Valtr, Petr Roztocil, David Dasek, Radek Musalek, Frantisek Lukac, Jakub Klecka, Marek Janata, Mariana Arnoult-Ruzickova, Eva Mistova, Ludek Jelinek, Petr Sajdl, Jan Macak
Summary: This paper focuses on the design of an experimental facility for in-situ electrochemical testing at supercritical water conditions, including the design of the electrode system and surface insulation coating for electrode leads.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Richard Djimasbe, Mikhail A. Varfolomeev, Nailya M. Khasanova, Ameen A. Al-Muntaser, Rustam R. Davletshin, Muneer A. Suwaid, Gazinur Z. Mingazov
Summary: This study confirms the capability of supercritical water to generate active hydrogen that interacts with different fractions in unconventional feedstocks, leading to synthetic oil production during hydrothermal reactions. The findings suggest that a maximum yield of 16.78% can be achieved at a temperature of 380 oC and a reaction time of 1-12 hours.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)