Article
Polymer Science
Yevgen Mamunya, Oleksii Maruzhenko, Roman Kolisnyk, Maksym Iurzhenko, Andrii Pylypenko, Olha Masiuchok, Marcin Godzierz, Igor Krivtsun, Barbara Trzebicka, Sebastien Pruvost
Summary: Electrothermal processes were investigated in pyroresistive composites of high-density polyethylene with carbon black and carbon fibers. The kinetic heating curves showed an exponential dependence with a heating rate constant for each composite. Equilibrium temperature was reached after a short heating time, and decreased with the presence of positive temperature coefficient of resistance (PTC) effect. The composites exhibited self-regulating capability and the equilibrium temperature depended on the applied voltage and electric power with different relationships. An application of using HDPE-CB composite as a heating element for resistance welding was demonstrated.
Article
Polymer Science
Basheer A. Alshammari, Asma M. Alenad, Fahad S. Al-Mubaddel, Abdullah G. Alharbi, Abdulaziz Salem Al-shehri, Hanan A. Albalwi, Fehaid M. Alsuabie, Hassan Fouad, Abdel-Hamid I. Mourad
Summary: The main objective of this study is to develop hybrid high-density polyethylene (HDPE) micro- and nanocomposites and investigate their thermal, mechanical, and morphological characteristics based on the number and content of fillers. The research findings reveal that the types, sizes, quantities, and dispersion states of fillers have a significant influence on the mechanical properties of the prepared composites.
Article
Engineering, Manufacturing
Francesco Casamento, Elisa Padovano, Stefano Pappalardo, Alberto Frache, Claudio Badini
Summary: Fused Filament Fabrication (FFF) is widely used for polymeric materials, but limited materials can be processed. Polypropylene and its composites, being versatile, have not been extensively studied in FFF due to adhesion and warping issues. In this study, composites of polypropylene with carbonaceous fillers (carbon nanotubes and carbon fibers) were developed using FFF. Processes for compounding, filament extrusion, and FFF were optimized, and the effect of fillers on the thermo-physical properties of the materials was investigated. The addition of carbon fibers significantly improved mechanical properties, while carbon nanotubes showed a moderate increase.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Review
Polymer Science
Yeon-Ju Kwon, Jung-Bin Park, Young-Pyo Jeon, Jin-Yong Hong, Ho-Seok Park, Jea-Uk Lee
Summary: With the development of electronic devices, carbon-based thermal conductive polymer composites have become an important technology for thermal management of next-generation electronic devices. Researchers have explored ways to improve thermal conductivity by designing a three-dimensional network structure, suppressing the electrical conductivity of carbon fillers, vertically aligning carbon fillers, and enhancing the durability of the composite materials.
Article
Materials Science, Multidisciplinary
Emily Miller, Missoury Wolff, Graham Tindall, Keturah Bethel, Bronson Lynn, Katarina Keppler, Mark C. Thies, Eric M. Davis
Summary: In this study, the influence of lignin molecular weight, lignin concentration, and accelerator concentration on the mechanical and transport properties of soft composites containing lignin, PNIPAm, and PVA was systematically investigated. The results showed that the addition of lignin significantly decreased permeability and increased Young's modulus. Furthermore, increasing lignin concentration and molecular weight improved the network structure and modified the transport properties of the thermoresponsive soft composites.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Composites
Lu Jing, Weili Li, Chang Gao, Menglu Li, Weidong Fei
Summary: A novel structure design of lamellar-structured MgO and BiFeO3/MgO fillers is proposed, and a series of PVDF-based composites are fabricated. The composites exhibit significantly improved breakdown strength and high energy storage performance due to the large heterojunction electric field produced by BFO and MgO.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Energy & Fuels
Harikrishnan Pulikkalparambil, M. Saravana Kumar, Ajish Babu, Vinod Ayyappan, Jiratti Tengsuthiwat, Sanjay Mavinkere Rangappa, Suchart Siengchin
Summary: This study investigates the effect of graphite nanoparticles on the thermal, mechanical, physical, and fatigue properties of woven bamboo fiber hybrid composites. Different weight fractions of graphite nanoparticles are added to the epoxy matrix to produce hybrid composites. Results show that the addition of graphite nanoparticles improves the tensile strength, flexural strength, and impact properties of the composites, as well as their thermal and hydrophilic properties. Furthermore, the composites exhibit good long-term stability under cyclic loading.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Materials Science, Multidisciplinary
Emily Miller, Missoury Wolff, Graham Tindall, Keturah Bethel, Bronson Lynn, Katarina Keppler, Mark C. Thies, Eric M. Davis
Summary: Here, the influence of lignin molecular weight, lignin concentration, and accelerator concentration on the properties of soft composites was systematically investigated. The addition of lignin decreased permeability and increased Young's modulus. The concentration and molecular weight of lignin further improved the mechanical and transport properties of the composites.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Engineering, Civil
Selim Gurgen, Mehmet Alper Sofuoglu
Summary: Polymer matrix composites have become widely used engineering materials due to developments in polymers and advanced fillers. However, machining operations on these materials can affect their engineering properties, and ceramic reinforced polymer composites exhibit different machinability properties compared to fiber-reinforced composites. Regression analyses were performed to investigate the relationships between the process parameters in this study.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Engineering, Manufacturing
Kimiyasu Sato, Yuichi Tominaga, Yuji Hotta, Yusuke Imai
Summary: Layered solid particles like h-BN and graphite have been utilized as anisotropic thermo-conductive fillers in polymer composites, but there is a desire for methods to prepare polymer composites with isotropic thermal conductivity. This study successfully prepared epoxy composites with isotropic thermal conductivity using these fillers, achieving solid loadings exceeding 60 vol% and thermal conductivity values of approximately 8 Wm(-1)K(-1) for h-BN/epoxy and 28-29 Wm(-1)K(-1) for graphite/epoxy composites. The internal solid fillers configuration achieved through integration of spherical particles was studied using X-ray diffraction analysis.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Trong Danh Nguyen, Thi Thu Trinh Phan, Jun Seop Lee
Summary: This study proposes a method for fabricating composite materials of carbon nanofibers and polydisulfide networks and analyzes their changes in properties. The composite materials exhibit excellent thermal conductivity, tensile performance, as well as self-healing and shape memory properties.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yiran Zhao, Jingyao Ma, Xia Yu, Min-Hui Li, Jun Hu
Summary: In this study, three UCST thermoresponsive polymers were synthesized with phase transition temperatures easily tunable to around 37 degrees Celsius for potential biological applications. The UCST of these polymers can be adjusted by the content of glycyrrhetinic acid and polymer concentrations, as well as host-guest interactions with cyclodextrins. These polymers may have practical applications in biomedical chemistry due to their suitable UCST value and biocompatible nature of glycyrrhetinic acid and cyclodextrins.
CHINESE CHEMICAL LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Cristina Cazan, Alexandru Enesca, Luminita Isac, Luminita Andronic, Mihaela Cosnita
Summary: This study investigates the properties of composites made from polymeric waste, organic fillers, and inorganic fillers, before and after accelerated aging for indoor or outdoor applications. The researchers evaluated the effects of moisture, temperature, UV radiation, and salt fog on the mechanical properties of the composites. Structural and molecular changes were observed through different analytical techniques. The durability performance of the waste composites was tested before and after accelerated aging. The mechanical properties of the composites depended on the interface between the different components and the characteristics of accelerated aging.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Shanjun Ding, Guocui Zhu, Shuai Zhao, Wei Wu, Peng Jin, Yuke Jiao, Wenrui Zhai, Lin Zhou, Yunjun Luo
Summary: The study fabricated self-healing hard polymer composites and self-healing thermoplastic elastomers with high mechanical strength, self-healing efficiency, and reshape ability.
Review
Materials Science, Composites
Ramesh Periyasamy, Mohit Hemanth Kumar, Sanjay Mavinkere Rangappa, Suchart Siengchin
Summary: Additive manufacturing (AM) is increasingly used due to its simple operating procedures and material-saving advantages. Fused deposition modeling (FDM), a well-known AM process, faces the challenge of lack of strength and durability in pure thermoplastic-based products. This article explores the use of natural reinforced polymer composites as a solution, presenting their mechanical and thermal properties based on natural filler percentage for the FDM process.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
Mun Sek Kim, Zewen Zhang, Jingyang Wang, Solomon T. Oyakhire, Sang Cheol Kim, Zhiao Yu, Yuelang Chen, David T. Boyle, Yusheng Ye, Zhuojun Huang, Wenbo Zhang, Rong Xu, Philaphon Sayavong, Stacey F. Bent, Jian Qin, Zhenan Bao, Yi Cui
Summary: In this study, the researchers found that Li3N can guide lithium deposition on its surface, decrease the coordination between lithium ions and solvents, induce an organic-poor solid-electrolyte interface (SEI) on the lithium metal anode, and facilitate lithium ion transport in the electrolyte, thereby improving the electrochemical performance of lithium metal batteries (LMBs).
Article
Nanoscience & Nanotechnology
Amnahir Pena-Alcantara, Shayla Nikzad, Lukas Michalek, Nathaniel Prine, Yunfei Wang, Huaxin Gong, Elisa Ponte, Sebastian Schneider, Yilei Wu, Samuel E. Root, Mingqian He, Jeffrey B. -H. Tok, Xiaodan Gu, Zhenan Bao
Summary: The study investigates the effects of molecular weight on the blend morphology, mechanical, and electrical properties of a polymer semiconductor (PSCs)/elastomer blend. The molecular weight of both the PSC and the elastomer has a significant influence on the resulting blend morphology and device performance. The findings highlight the importance of molecular weight in stretchable electronic devices.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Kyun Kyu Kim, Min Kim, Kyungrok Pyun, Jin Kim, Jinki Min, Seunghun Koh, Samuel E. Root, Jaewon Kim, Bao-Nguyen T. Nguyen, Yuya Nishio, Seonggeun Han, Joonhwa Choi, C-Yoon Kim, Jeffrey B. -H. Tok, Sungho Jo, Seung Hwan Ko, Zhenan Bao
Summary: With the help of machine learning, electronic devices such as gloves and skins can track human hand movements and recognize objects and gestures. However, these devices are bulky and cannot adapt to the body's curvature. This study introduces a substrate-less nanomesh receptor coupled with unsupervised meta-learning framework, allowing user-independent recognition of various hand tasks with minimal labeled data.
NATURE ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Philaphon Sayavong, Wenbo Zhang, Solomon T. Oyakhire, David T. Boyle, Yuelang Chen, Sang Cheol Kim, Rafael A. Vila, Sarah E. Holmes, Mun Sek Kim, Stacey F. Bent, Zhenan Bao, Yi Cui
Summary: This study quantitatively and comparatively investigates the solubility of solid electrolyte interfaces (SEIs) derived from ether-based electrolytes optimized for Limetal anodes (LMAs) using in-operando electrochemical quartz crystal microbalance (EQCM). The results suggest that solubility of SEIs directly affects their formation and growth, and is closely related to the properties of the electrolyte. This provides crucial information to minimize capacity loss caused by SEI formation and growth during battery cycling and aging.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Polymer Science
Chibueze V. Amanchukwu, Anna B. Gunnarsdottir, Snehashis Choudhury, Tamsin L. Newlove, Pieter C. M. M. Magusin, Zhenan Bao, Clare P. Grey
Summary: Lithium metal batteries have the potential to revolutionize energy storage and electric transportation, but face challenges in morphology and electro-chemo-mechanics. Polymer-based solid-state electrolytes show promise in replacing liquid electrolytes, but have issues with ionic conductivity and stability. Perfluoropolyether (PFPE)-based electrolytes have improved oxidative stability, but little is known about their lithium solvation and transport mechanism. This study uses solid-state magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy to investigate lithium cation environment and mobility in PFPE electrolytes and compare it to polyethylene glycol (PEG) electrolytes. The results show weaker interaction between lithium cation and PFPE polymer backbone, resulting in stronger ion pairing. The mobility of lithium ions is lower in PFPE electrolytes, attributed to polymer backbone fluctuations. Differences in polymer backbones have a greater effect on mobility than differences in ion binding modes within each polymer class. The ability to study polymer electrolytes in their native state opens opportunities for development of next-generation lithium metal batteries.
Article
Multidisciplinary Sciences
Ying Jiang, Shaobo Ji, Jing Sun, Jianping Huang, Yuanheng Li, Guijin Zou, Teddy Salim, Changxian Wang, Wenlong Li, Haoran Jin, Jie Xu, Sihong Wang, Ting Lei, Xuzhou Yan, Wendy Yen Xian Peh, Shih-Cheng Yen, Zhihua Liu, Mei Yu, Hang Zhao, Zechao Lu, Guanglin Li, Huajian Gao, Zhiyuan Liu, Zhenan Bao, Xiaodong Chen
Summary: Stretchable hybrid devices have been developed for high-fidelity monitoring of physiological signals. A universal interface, consisting of interpenetrating polymer and metal nanostructures, can reliably connect soft, rigid, and encapsulation modules together without using pastes. This interface enables the formation of robust and highly stretchable devices for various applications.
Article
Nanoscience & Nanotechnology
Yu Zheng, Lukas Michalek, Qianhe Liu, Yilei Wu, Hyunjun Kim, Philaphon Sayavong, Weilai Yu, Donglai Zhong, Chuanzhen Zhao, Zhiao Yu, Jerika A. Chiong, Huaxin Gong, Xiaozhou Ji, Deyu Liu, Song Zhang, Nathaniel Prine, Zhitao Zhang, Weichen Wang, Jeffrey B. -H. Tok, Xiaodan Gu, Yi Cui, Jiheong Kang, Zhenan Bao
Summary: This research reports a surface-tethered stretchable molecular protecting layer for achieving environmental stability of stretchable polymer electronics in direct contact with physiological fluids. The densely packed nanostructures formed by covalently functionalizing fluoroalkyl chains onto the surface of stretchable polymer semiconductor films enable the operational stability of PSCs for an extended period and maintain protection under mechanical deformation. The hydrophobicity and high fluorination surface density of the nanostructured fluorinated molecular protection layer contribute to its ability to block water absorption and diffusion.
NATURE NANOTECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Sruthi Santhanam, Vivian R. R. Feig, Kelly W. W. McConnell, Shang Song, Emily E. E. Gardner, Jainith J. J. Patel, Dingying Shan, Zhenan Bao, Paul M. M. George
Summary: Stem cells are a promising treatment option for neurological diseases, but the ideal environment to optimize their therapeutic potential is still unclear. This study develops a conducting polymer hydrogel with tunable mechanical properties as a platform for interactions with mesenchymal stem cells (MSCs). The hydrogel formulation is optimized for maximum viability of MSCs and increased cytoskeletal protein expression. Electrical stimulation alters the trophic factor secretion of MSCs, increasing the expression of VEGFA and HSPB1 genes. In addition, substrate stiffness of the hydrogel enhances the secretion of VEGFB. The conducting polymer hydrogel system creates a tunable physical and electrical niche to enhance the therapeutic potential of stem cells for neurological injuries.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Gun-Hee Lee, Hyeonji Kim, Juhyun Lee, Jae-Young Bae, Congqi Yang, Hanul Kim, Heemin Kang, Siyoung Q. Choi, Seongjun Park, Seung-Kyun Kang, Jiheong Kang, Zhenan Bao, Jae-Woong Jeong, Steve Park
Summary: This article presents a method for large-area multi-layered patterning of 'polystyrene sulfonate-attached eutectic gallium-indium particle (EGaIn*:PSS)' thin-film using conventional cleanroom process. The method enhances the stability of EGaIn* and allows uniform thin-film coating and photographic lift-off, enabling initial electrical conductivity without an additional activation process. Demonstrations prove the versatility and reliability of this manufacturing strategy for soft electronics.
Article
Multidisciplinary Sciences
Anqi Zhang, Kang Yong Loh, Chandan S. S. Kadur, Lukas Michalek, Jiayi Dou, Charu Ramakrishnan, Zhenan Bao, Karl Deisseroth
Summary: We have developed a method to express enzymes on the plasma membrane of primary neurons, specifically and efficiently. This allows us to form dense extracellular clusters of synthesized polymers on targeted cell membranes, while maintaining neuron viability. This method is highly versatile and can incorporate a wide range of materials onto specific cell membranes, enabling the development of next-generation biological interfaces.
Article
Engineering, Biomedical
Wenjianlong Zhou, Yuanwen Jiang, Qin Xu, Liangpeng Chen, Hui Qiao, Yi-Xuan Wang, Jian-Cheng Lai, Donglai Zhong, Yuan Zhang, Weining Li, Yanru Du, Xuecheng Wang, Jiaxin Lei, Gehong Dong, Xiudong Guan, Shunchang Ma, Peng Kang, Linhao Yuan, Milin Zhang, Jeffrey B. -H. Tok, Deling Li, Zhenan Bao, Wang Jia
Summary: Soft conducting polymer electrodes were developed for continuous and precise localization of a target nerve during microsurgeries, leading to improved post-operative prognoses after tumour-resection surgeries in rats. The electrodes offered higher signal-to-noise ratios and reduced invasiveness compared to handheld clinical probes, allowing for continuous recording of near-field action potentials. The system enabled precise identification of neural anatomy throughout the procedure, enhancing the overall outcomes of the surgeries.
NATURE BIOMEDICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Tomoko Nogusa, Christopher B. Cooper, Zhiao Yu, Yu Zheng, Yuran Shi, Zhenan Bao
Summary: This study found that hydrophobic perfluoropolyether (PFPE) dynamic polymers can act as effective underwater adhesives by enhancing van der Waals interactions and minimizing water uptake. The optimized bonding interactions and bulk dynamics of the polymers enable high cohesive strength while maintaining a hydrophobic, nanophase-separated morphology. The resulting adhesives can be reversibly applied to various substrates in fully underwater conditions without any solvent or covalent crosslinking.
Meeting Abstract
Cell Biology
Artem A. Trotsyuk, Serena Jing, Kellen Chen, Dominic Henn, Yuanwen Jiang, Simiao Niu, Dharshan Sivaraj, Ronjon Nag, Michael Snyder, Zhenan bao, Geoffrey C. Gurtner
WOUND REPAIR AND REGENERATION
(2023)
Meeting Abstract
Cell Biology
Artem A. Trotsyuk, Yuanwen Jiang, Simiao Niu, Kellen Chen, Dominic Henn, Dharshan Sivaraj, Zhenan Bao, Geoffrey C. Gurtner
WOUND REPAIR AND REGENERATION
(2023)
Article
Materials Science, Multidisciplinary
Zhuojun Huang, Jian-Cheng Lai, Xian Kong, Ivan Rajkovic, Xin Xiao, Hasan Celik, Hongping Yan, Huaxin Gong, Paul E. Rudnicki, Yangju Lin, Yusheng Ye, Yanbin Li, Yuelang Chen, Xin Gao, Yuanwen Jiang, Snehashis Choudhury, Jian Qin, Jeffrey B. -H. Tok, Yi Cui, Zhenan Bao
Summary: We propose a novel liquid-state polymer electrolyte composed of LiFSI salts, DME solvents, and polysiloxane tethered with ion-solvating moieties. Anchored solvent molecules can increase the ionic conductivity of the electrolyte without undermining its non-flammability. The resulting non-flammable polymer electrolyte has a room-temperature ionic conductivity of 1.6 mS/cm and a wide operation window of 25?-100?, and can pair with commercially available electrodes without further cell engineering.