Article
Engineering, Electrical & Electronic
Omer Guler, Oykum Basgoz, Seval Hale Guler, Canan A. Canbay, Sehzat Acikgoz, Mustafa Boyrazli
Summary: The addition of carbon nanotubes (CNTs) and graphene nanoplates (GNPs) into polyester matrix affects the mechanical properties and electrical conductivity of the composite materials. With increasing reinforcement ratio, the mechanical properties and electrical conductivity of both polyester-CNTs composite and polyester-CNT + GNP composite improved. However, the mechanical properties of CNTs-GNPs reinforced polyester composite were found to be lower than composites reinforced only with CNTs.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Multidisciplinary
Mohammed Al-Bahrani, Alistair Cree
Summary: Self-sensing nanocomposites based on MWCNTs demonstrate improved electrical and mechanical properties, with increasing concentrations of MWCNTs resulting in enhanced hardness and electrical conductivity. Structural damage at the micro-scale level can lead to changes in electrical resistance and permanent electric damage. A micro-scale model is suggested to predict resistance changes caused by micro-indentation damage.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Chemistry, Physical
Zhangjie Li, Maolin Liu, Shufei Ma, Zhixin Jia, Demin Jia
Summary: In this study, carbon nanotubes (CNTs) were used as carbon source and combined with Ti3C2 MXene sheets under liquid-phase conditions to fabricate CNTs@Ti3C2 skeleton. Then, ruthenium (Ru) chloride and cobalt (Co) nitrate were introduced as metal source and carbonized the mixture at high temperature to obtain carbon/MXene composites loaded with cobalt-ruthenium metal nanoparticles (CoRu/CNTs@Ti3C2). The obtained composite exhibited excellent hydrogen evolution reaction (HER) performance, with low HER overpotential and stable electrochemical activity.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Engineering, Chemical
Amirreza Dana, Saeed Sheibani
Summary: A CuxO/CNTs nanocomposite was prepared and studied for its photocatalytic activity. Lowering the copper oxide content was found to decrease the bandgap and electron-hole pair recombination rate. The material showed good degradation efficiency towards methyl orange and methylene blue under visible light irradiation.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Materials Science, Composites
Long Fu, Kun Li, Hua Qin, Junji Hou, Xiaoli Zhang, Guangjian He, Baochen Liu, Chenxing Ren, Jingbo Chen
Summary: Polymer-based nanocomposite foams with a sandwich structure consisting of a micro-foamed core layer and nano-foamed skin layers were prepared using iPP and CNTs. The foam exhibited a strong EMI shielding performance attributed to the absorption mechanism.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Salma Ahmed Al-Zahrani, Imran Khan
Summary: A new and novel heavy metal ion selective organic-inorganic composite was successfully prepared and used for the preparation of an ion-selective membrane electrode with excellent selectivity for Hg2+ ions.
ALEXANDRIA ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Yue Yuan, Shicheng Wei, Yi Liang, Bo Wang, Yujiang Wang, Wei Xin, Xinlei Wang, Yu Zhang
Summary: The cobalt ferrite/carbon nanotubes nanocomposite absorber materials synthesized by a solvothermal method demonstrate excellent absorption properties and a wide absorption bandwidth, making them suitable for microwave absorbers in various technological applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Jingyun Luo, Dexian Yin, Kejing Yu, Hongfu Zhou, Bianying Wen, Xiangdong Wang
Summary: In this paper, a biodegradable nanocomposite foam with outstanding electromagnetic interference shielding was fabricated by blending poly (butylene succinate) (PBS) with carbon nanotubes (CNTs) followed by foaming with supercritical CO2. The addition of CNTs significantly improved the crystallization temperature and melting temperature of PBS nanocomposites, as well as enhanced the electrical properties. The CNTs also endowed the PBS foam with adjustable electromagnetic interference (EMI) shielding property.
Article
Chemistry, Physical
Vitaly Gurylev, Tzu-Kang Chin, Artur Useinov
Summary: The study investigated the correlation between field emission characteristics of TiO2@CNTs nanocomposite and TiO2 crystallinity by charge transfer mechanism. Results showed that CNTs covered with amorphous TiO2 exhibited the best field emission properties due to more efficient charge transfer caused by oxygen vacancies in amorphous TiO2.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Xiaofei Liu, Jian Wang, Zhonghui Shen, Hongjian Zhang, Baowen Li, Yong Zhang, Xin Zhang
Summary: This study proposes a flexible piezoelectric polymer nanocomposite based on CNTs@PZT nanofibers network, which improves the electrical conductivity and mechanical strength of the composite material by introducing carbon nanotubes. The experiments show that the piezoelectric generator based on the CNTs@PZT nanofibers network with an optimal addition of 0.6 wt% CNTs exhibits higher electrical output performance and power density.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Multidisciplinary
Ali Dabbagh, Farzad Ebrahimi
Summary: This study investigates the postbuckling characteristics of thin beams made from auxetic carbon nanotube-reinforced nanocomposites for the first time, using a bi-stage micromechanical homogenization technique to obtain the effective modulus and analyzing the effect of auxetic angles on beam strength. The results show that selecting smaller auxetic angles enhances the buckling resistance of meta-nanocomposite beams, while employing a wide auxetic lattice leads to structural failure under smaller buckling loads.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Chemistry, Multidisciplinary
Jianwei Wang, Qian Ding, Caihui Bai, Feifei Wang, Shiguo Sun, Yongqian Xu, Hongjuan Li
Summary: The CNTs/CoNiFe-LDH hybrid material was successfully prepared using a one-step hydrothermal approach, which improved the conductivity and surface area of the electrode, leading to enhanced electrochemical performance. This material showed promising application in hybrid supercapacitor electrodes.
Article
Electrochemistry
Muhammad Aadil, Sonia Zulfiqar, Muhammad Shahid, Philips O. Agboola, Najeeb Faud Al-Khalli, Muhammad Farooq Warsi, Imran Shakir
Summary: In this study, CoS2/CNTs nanocomposite electrodes were successfully prepared via a two-step hydrothermal and post-annealing approach, showing excellent performance and cyclic stability for energy storage applications. The CNTs-supported CoS2 sample exhibited outstanding rate capability and improved electrochemical properties.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Fangxin Wang, Yongyang Sun, Wenyan Liang, Hailing He, Bin Yang, Alex Osei Bonsu
Summary: This study investigated the three-line synergistic icephobicity based on CNTs/PDMS nanocomposites, and elucidated the underlying mechanisms.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
Irshad Ahmad, Shazia Shukrullah, Muhammad Yasin Naz, Muhammad Athar Rasheed, Mukhtar Ahmad, Ejaz Ahmed, Muhammad Shoaib Akhtar, N. R. Khalid, Abid Hussain, Sadia Khalid
Summary: Decorating carbon nanotubes onto Sr doped ZnO nanoparticles resulted in a highly efficient photocatalyst for hydrogen evolution under visible light illumination. The improved hydrogen evolution activity of Sr doped ZnO/CNTs is attributed to high surface area, Sr doping, and construction of heterojunction, extending light absorption and improving charge separation. The proposed photocatalytic mechanism is based on Mott-Schottky study, explaining the interfacial charge transfer process from ZnO to CNTs and Sr.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Jinhu Chen, Agnieszka Lekawa-Raus, James Trevarthen, Tomasz Gizewski, Damian Lukawski, Kalyan Hazra, Sameer S. Rahatekar, Krzysztof K. K. Koziol
Article
Archaeology
Christine Romano, Thomas Lam, G. Asher Newsome, Joshua A. Taillon, Nicole Little, Jia-sun Tsang
STUDIES IN CONSERVATION
(2020)
Article
Chemistry, Physical
Sindhu Seethamraju, Jan Obrzut, Jack F. Douglas, Jeremiah W. Woodcock, Jeffrey W. Gilman
JOURNAL OF PHYSICAL CHEMISTRY B
(2020)
Article
Chemistry, Multidisciplinary
Jochen Campo, Sofie Cambre, Bea Botka, Jan Obrzut, Wim Wenseleers, Jeffrey A. Fagan
Summary: Specific and tunable modification of the optical properties of single-wall carbon nanotubes (SWCNTs) is demonstrated through direct encapsulation of guest molecules with varying dielectric constants into the nanotube interior. The insertion of over 30 different compounds covering a wide range of dielectric constants results in a monotonic energy reduction of optical transitions with increasing dielectric constant. The overall trend of filler dielectric on nanotube optical properties, including fluorescence intensity and line narrowing, is observed with some exceptions that defy existing theory.
Article
Chemistry, Analytical
Aleksandra Popowich, Thomas Lam, Edward P. Vicenzi
Summary: A new standards-based SEM-EDS method was used to analyze the thin-film coating of an 18th-century French textile decorated with metal threads. The study found that the thread coating was an alloy of approximately 80% Au and 20% Ag on a nominally pure Ag substrate, matching the minimum gold standard allowed for goods around the time of manufacture. The computed gilding thicknesses vary from single digit nm to 300 nm due to surface inhomogeneities formed during production.
ANALYTICAL CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Huyen Vu, Jeremiah W. Woodcock, Ajay Krishnamurthy, Jan Obrzut, Jeffrey W. Gilman, E. Bryan Coughlin
Summary: This study investigates the effect of polymer dynamics in CNC nanocomposites by attaching a water-sensitive dye to the polymer and using fluorescence lifetime imaging microscopy. The research shows that polymer chains with high mobility improve the strain and toughness of CNC films.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Humanities, Multidisciplinary
Miriam E. Hiebert, Thomas Lam, Sarah Oakman, Shannon Brogdon-Grantham
Summary: The National Museum of American History's Photographic History Collection at the Smithsonian houses the largest collection of Eadweard Muybridge's Animal Locomotion glass plate photographs. These images are the immediate predecessor to motion pictures and serve as an invaluable research tool in understanding Muybridge's process and place in the history of photography. As part of a survey of the condition of this collection, analysis was conducted on the materials and deterioration products found on the plates. This article focuses on observations made during the analysis of the gelatin emulsion layer carrying the images on these objects, as the deterioration and loss of this layer is most compromising to the identity and significance of the objects themselves. The analysis was conducted on image plates and fragments that have dissociated from their original composite panels. The results of the analysis included: identification of gelatin and image forming materials, new information about the photographic processes used in the production of these plates, namely the use of mercury intensification, and significant insights into the various deterioration mechanisms found on these objects including silver mirroring, water damage, and gelatin cracking, that threaten the long-term stability of this collection.
JOURNAL OF THE AMERICAN INSTITUTE FOR CONSERVATION
(2022)
Article
Humanities, Multidisciplinary
Edward P. Vicenzi, Thomas Lam, Jamie L. Weaver, Andrew A. Herzing, John S. McCloy, Rolf Sjoblom, Carolyn Pearce
Summary: This study analyzed dark and clear silicate glasses formed during an iron age vitrification event approximately 1500 years ago using a scanning electron microscope equipped with a micro-X-ray fluorescence (mu XRF) spectrometer. The results showed that the dark glass is enriched in iron, calcium, magnesium, titanium, etc., while the clear glass is enriched in silicon, aluminum, potassium, etc. Multivariate statistical analysis was also used to measure the area fractions of different components, providing important insights for future high-resolution and high-sensitivity studies.
Article
Materials Science, Ceramics
Miriam E. Hiebert, Sarah Oakman, Shannon Brogdon-Grantham, Thomas Lam
Summary: The National Museum of American History at the Smithsonian Institution houses the largest collection of inter-positive composite glass plate images from Eadweard Muybridge's Animal Locomotion series. These 150-year-old photographs show various degradation phenomena and alteration of the glass plates. Analyzing the composition of the image-bearing glass plates and support glass panels, researchers observed a visible sodium-depleted glass alteration layer and the delamination of the gelatin layer. Evidence suggests that interfacial stresses between the glass alteration layer and the unaltered glass contribute to the delamination process.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Polymer Science
Derek E. Huang, Anthony P. Kotula, Chad R. Snyder, Kalman B. Migler
Summary: Motivated by the issue of brittle mechanical behavior in recycled blends of HDPE and iPP, this study investigates the composition dependence of their crystallization kinetics using optical microscopy, rheo-Raman, and DSC. The results show that the crystallization behavior of iPP varies with blend composition, with three distinct two-phase morphologies observed. The crystallization temperature of iPP decreases sharply with increasing HDPE composition in the HDPE droplet regime, while it is delayed but shows little change in the onset temperature in cocontinuous morphologies. In the iPP droplet regime, the two components crystallize nearly concurrently. Rheological measurements support these findings. DSC analysis suggests that the enthalpy of crystallization of the blends is less than the weighted values of the individual components.
Article
Humanities, Multidisciplinary
Teresa T. Duncan, Edward P. Vicenzi, Thomas Lam, Shannon A. Brogdon-Grantham
Summary: This study compares the cleaning effectiveness of different materials on three different roughness samples of paper, using black lamp soot as a model for soot removal. Ten different dry surface cleaning materials, including sponges, hard and soft erasers, eraser crumbs, cleaning putty, solvent-free polydimethylsiloxane elastomer, and dry swabs, were evaluated using a portable spectrophotometer and image analysis of photomicrographs. Inspection of the cleaned substrates using a portable optical microscope provided detailed information on how the physical properties of cleaning materials influenced the location of soot residues on the surface. 3D digital light microscopy was used to evaluate physical changes to the paper surface and Fourier-transform infrared spectroscopy was used to identify potential cleaning material residues. The results of this model study were compared with spot cleaning tests conducted on a fire-damaged book cover. Limited access to laboratory spaces during the COVID-19 lockdown motivated this research to focus on affordable technical research methods that can be done outside of the laboratory, with details noted throughout the article.
JOURNAL OF THE AMERICAN INSTITUTE FOR CONSERVATION
(2023)
Article
Chemistry, Physical
Miriam E. Hiebert, Jamie Weaver, Thomas Lam, Nicole Little, Ethan Hyde, Edward P. Vicenzi, Raymond J. Phaneuf
Summary: The study investigates the use of ALD amorphous aluminium oxide and titanium oxide coatings in reducing the rate of silicate glass alteration. The results show that the ALD coating can decrease the concentration of released Na and Si from the glass, indicating a protective effect. The formation of secondary phase sediment is also prevented by the ALD coating. However, the delamination of the ALD coating after prolonged immersion limits its efficacy.
PHYSICS AND CHEMISTRY OF GLASSES-EUROPEAN JOURNAL OF GLASS SCIENCE AND TECHNOLOGY PART B
(2022)
Article
Archaeology
Meredith C. Sharps, Maria M. Martinez, Michael Brandl, Thomas Lam, Edward P. Vicenzi
Summary: X-ray fluorescence spectrometry was utilized to identify the geochemical sources of obsidian artifacts, confirming two tablets sourced from Ucareo in Michoacan, Mexico, and revealing a potential new source for a mahogany obsidian tablet within the Los Azufres complex. The study compared major, minor, and trace element compositions using SEM-based energy dispersive X-ray spectrometry and micro-XRF spectrometry, providing valuable insights into archaeological sources and discussing differences in data between portable and micro-XRF methods.
JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS
(2021)
Article
Crystallography
Anthony P. Kotula, Kalman B. Migler
Summary: The article details recent experimental developments in polymer crystallization rheology and modeling efforts, revealing key rheological evolutions during crystallization and explaining these phenomena through the concept of percolation. The experimental results provide important references for expanding the semicrystalline polymer materials space and developing new techniques.
POLYMER CRYSTALLIZATION
(2021)
Article
Humanities, Multidisciplinary
Christine Romano, Thomas Lam, Christopher A. Maines, Jia-sun Tsang
Summary: The translation discusses the investigation and analysis of the cracking and delamination of African American artist Felrath Hines' works in the National Museum of African American History and Culture, exploring the potential causes of deterioration including the inherent flaws of modern materials. Through detailed research and instrumental analysis, it was found that despite Hines' meticulous technique, the materials used in modern art contributed to the current conditions of the paintings.
JOURNAL OF THE AMERICAN INSTITUTE FOR CONSERVATION
(2021)
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.
