Article
Polymer Science
Jacek Mirowski, Rafal Oliwa, Mariusz Oleksy, Jolanta Tomaszewska, Joanna Ryszkowska, Grzegorz Budzik
Summary: Adding 20% of raspberry pomace filler after extraction significantly extended the thermal stability time for the composites, but as the concentration of filler in the PVC matrix increased, the composite density, impact strength, and tensile strength values decreased significantly while their modulus of elasticity and Shore hardness increased.
Article
Chemistry, Multidisciplinary
Anying Zhang, Wenhui Wang, Zhenfeng Dong, Jianfei Wei, Lifei Wei, Weiwen Gu, Guo Zheng, Rui Wang
Summary: In this study, an antidroplet flame retardant system based on FRPET was developed by adding DOPO-POSS as an additive flame retardant. The results showed that DOPO-POSS improved the fire resistance and limiting oxygen index of FRPET, and also enhanced the combustion characteristics.
Article
Engineering, Manufacturing
Jongho Kim, Minsik Choi, Nam-Ho You, Jaesang Yu, Heejoun Yoo, Bon-Cheol Ku
Summary: Polyacrylonitrile (PAN)-based flame retardants with dihydroxy styrene monomers and catechol units were synthesized as high-flame retardants using an efficient thermal oxidative stabilization (TOS) process. Composite materials of PAN copolymers with graphene oxide (GO) and sulfur-doped reduced GO (SrGO) showed improved flame-retarding properties, attributed to the high char layer produced by TOS and radical scavenging effect of sulfur-functionalized SrGO. Incorporating SrGO into PAN copolymers with catechol units is a promising approach for developing environmentally friendly high-flame retardants.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Polymer Science
Lingmin Hu, Zhiang Fu, Xiaoying Gu, Hengti Wang, Yongjin Li
Summary: A new strategy involving the addition of boehmite nanorods at the interface of PLLA/PP blends has been proposed to enhance compatibility and flame retardancy, leading to significant improvements in mechanical properties and flame retardancy. The strengthened interface plays a crucial role in the synergetic enhancements observed in the materials.
Article
Engineering, Chemical
Eyob Wondu, Jooheon Kim
Summary: This study focuses on the development of composite materials using thermoplastic polyurethane (TPU) and poly(lactic acid) (PLA) with fillers such as barium titanate (BaTiO3) and graphene. The results demonstrate a three-fold improvement in the dielectric constant and an improved tensile strength for the 40 wt.% BaTiO3 and graphene-TPU-PLA blends composites, as well as a doubled thermal conductivity compared to the neat TPU-PLA matrix.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Chemistry, Applied
Sensen Han, Fei Yang, Qingshi Meng, Jun Li, Guoxin Sui, Xiao Su, Hsu-Chiang Kuan, Chun H. Wang, Jun Ma
Summary: This study presents a method to assemble renewable adenosine triphosphate (ATP), melamine, and graphene nanoplatelets (GNPs) into hybrid particles (ATP-melamine-GNPs) for flame-retarding polymer nanocomposites. These hybrid particles showed uniform dispersion and strong interfacial adhesion in an epoxy matrix. The addition of ATP-melamine-GNPs improved the mechanical properties and flame retardancy of the nanocomposites. The findings of this work provide a new platform for developing environmentally friendly and mechanically resilient polymer nanocomposites with flame-retardant properties.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Engineering, Manufacturing
Wenduo Wang, Zhengzhou Wang
Summary: Layered zinc N, N'-piperazine (bismethylene phosphonate) functionalizing reduced graphene oxide (rGO@ZnPB) can enhance the flame retardancy and thermal mechanical properties of epoxy resin, as well as improve its thermal stability and glass transition temperature. The EP/rGO@ZnPB composites exhibit significant advantages in flame retardancy and thermal performance.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Engineering, Manufacturing
Wonyoung Yang, Jihoon Kim, Jooheon Kim
Summary: In this study, a composite material consisting of hyperbolic boron nitride and graphene oxide with surface treatment using phosphorus-containing functional groups was developed. The composite achieved improved thermal conductivity and tensile strength, along with flame-retardant properties. This composite holds promise for various applications that require enhanced heat transfer and mechanical performance.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Engineering, Chemical
Rong Ma, Ruiqing Shen, Yufeng Quan, Qingsheng Wang
Summary: Graphene quantum dots were decorated onto montmorillonite to create nanohybrids, which were then incorporated into a polystyrene matrix. The resulting nanocomposites showed enhanced interfacial interaction and improved flame retardancy. This study proposes a novel method to modify montmorillonite and produce well-dispersed polymeric materials with enhanced fire safety.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Yunfei Guo, Anna M. M. Cristadoro, Julian Kleemann, Stefan Bokern, Rint P. P. Sijbesma, Zeljko Tomovic
Summary: Polyurethane can be modified with thermally stable aromatic imide structures to enhance its mechanical and thermal properties. In this study, imide-containing isocyanate-terminated prepolymers were synthesized in solvent-free conditions and used to prepare PUI elastomers with improved char formation and stiffness. The aromatic PUI elastomer also showed enhanced flame retardancy. This work demonstrates the potential use of imide prepolymers in high thermal stability and flame retardant PU applications.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Florian Tomiak, Kevin Schneider, Angelina Schoeffel, Klaus Rathberger, Dietmar Drummer
Summary: Expandable graphite and graphite are effective additives for improving the flame retardancy and thermal conductivity of polyamide 6-based materials. The thermal conductivity significantly influences the time to ignition, but does not provide effective fire resistance once ignited. Good thermal conductivity properties are particularly effective in scenarios with low heat impact and good heat dissipation and convective cooling possibilities.
Article
Polymer Science
Borys M. Gorelov, Oleksandr Mischanchuk, Nadia Sigareva, Sergey Shulga, Alla M. Gorb, Oleksiy Polovina, Volodymyr O. Yukhymchuk
Summary: Multilayered graphene nanoplatelets (MLGs) were prepared using an electrochemical technique from thermally expanded graphite flakes. The morphological characterization and studies on DGEBA-epoxy-based nanocomposites filled with MLGs showed enhancements in compression strength, Young's modulus, thermal stability, and dielectric properties at varying loadings. Discussions on the physical mechanisms of MLG-epoxy interactions underlying the observed effects were also included in the study.
Review
Chemistry, Multidisciplinary
Deepak Rawtani, Swath Satish, Piyush Rao
Summary: Industrial and academic communities are closely following the advancements in polymer nanocomposite technology, which aims to enhance specific characteristics through the combination of nanomaterials. The properties of resulting nanocomposites depend on factors such as the choice of clay, pretreatment, choice of polymers, and the method of incorporating polymers. The addition of nanoparticles to polymers significantly changes the properties of the composites, with the effects relying on the processing and surface treatment of the nanomaterials. Halloysite nanotubes (HNTs) have surface features that allow for surface modifications, and their inter-tubular and interfacial interactions with polymers enhance the thermal properties of the nanocomposites. Halloysite has been recognized as a suitable nanomaterial to improve the thermal stability and flame retardancy of resulting nanocomposites.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Applied
Zhi-cheng Wang, Wan-an Cai, Jia-xin Cheng, Liang Qi, Wen-bin Liu, Yanhui Wang, Jun Wang
Summary: The conditions for synthesizing soluble polybenzoxazine precursors were discovered, and the influence of vacuum degree on gelation of polybenzoxazine precursors was found for the first time. The synthesized hyperbranched benzoxazole polymers exhibited good thermal stability and flame retardancy, making them suitable for nonignitable materials.
REACTIVE & FUNCTIONAL POLYMERS
(2023)
Review
Materials Science, Multidisciplinary
Urszula Szeluga, Slawomira Pusz, Bogumila Kumanek, Karolina Olszowska, Anastasiia Kobyliukh, Barbara Trzebicka
Summary: This review discusses the application of graphene materials as fillers in epoxy composites, highlighting the significance of functionalization methods in improving the properties of graphene-epoxy composites. It also considers the influence of graphene filler structure and dispersion preparing procedure on the final properties of the composites.
CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES
(2021)
Article
Chemistry, Physical
Jie Sheng, Jingshan He, Dun Ma, Yuanbo Wang, Wu Shao, Tian Ding, Ronghao Cen, Jingwen He, Zhihao Deng, Wenjun Wu
Summary: This study presents an innovative approach to improve the photovoltaic conversion characteristics and stability of perovskite solar cells through carbon electrode interface modification. By in-situ polymerization and carbonization on the surface of nano-graphite, a dendritic structure carbon electrode is formed, reducing the work function and aligning the energy levels with perovskite. This leads to improved charge and hole collection efficiency, resulting in increased photovoltaic conversion efficiency. Furthermore, the modified carbon electrode-based perovskite solar cells exhibit exceptional stability, maintaining high efficiency even without encapsulation.
Article
Chemistry, Physical
Guodong Shi, Jian Song, Xiaoxiao Tian, Tongtong Liu, Zhanjun Wu
Summary: This study demonstrates the improvement of mechanical properties and reduction of coefficient of thermal expansion (CTE) in graphene oxide (GO)/epoxy (EP) nanocomposites by enhancing the interface between GO and EP through functionalization and incorporating rigid-flexible interphases. The results reveal that the SiO2-PEA-GO hybrid exhibits better strengthening and toughening effects, as well as lower CTE, compared to the PEA-GO hybrid due to the presence of rigid-flexible interfaces with higher bonding strength and better energy dissipation mechanisms. Additionally, the nanocomposites with longer polyetheramine (PEA) molecules in the rigid-flexible interphases demonstrate higher strength and toughness, while maintaining a lower CTE. This work provides a promising strategy for constructing adjustable flexible-rigid interfacial structures and offers potential in developing GO/EP nanocomposites with high mechanical properties and low CTE.
Article
Chemistry, Physical
Rafal Janus, Sebastian Jarczewski, Jacek Jagiello, Piotr Natkanski, Mariusz Wadrzyk, Marek Lewandowski, Marek Michalik, Piotr Kustrowski
Summary: In this study, a facile procedure for the synthesis of CMK-1 and CMK-2 carbon replicas was developed. The method utilizes basic laboratory equipment and a renewable carbon source, and operates under mild conditions. The resulting carbon mesostructures exhibit exquisite replication fidelity and structural homogeneity, making them suitable for applications in various fields.
Article
Chemistry, Physical
Anqi Wang, Connor J. MacRobbie, Alex Baranovsky, Jean-Pierre Hickey, John Z. Wen
Summary: In this study, a novel polymer-free nanothermite aerogel with a wide range of nanoparticle loading was fabricated via a new additive manufacturing process. The SEM images showed a unique porous structure formed by extra thin rGO sheets, wrapping individual nanothermite clusters. The DSC-TGA results and high-speed combustion videos confirmed the enhanced energetic performance of the printed specimen.
Article
Chemistry, Physical
Wanze Wu, Misheng Zhao, Shiwei Miao, Xiaoyan Li, Yongzhong Wu, Xiao Gong, Hangxiang Wang
Summary: Superhydrophobic solar-driven interfacial evaporator is an energy-efficient technology for seawater desalination, which is easily fabricated using robust photothermal superhydrophobic coating and substrate. The created bifunctional coating on the melamine sponge substrate shows stable and highly efficient photothermal and superhydrophobic performance for seawater desalination. This superhydrophobic solar-driven interfacial evaporator is expected to have wide applications in seawater desalination.
Article
Chemistry, Physical
Zichen Xiang, Zhi Song, Tiansheng Wang, Menghang Feng, Yijing Zhao, Qitu Zhang, Yi Hou, Lixi Wang
Summary: This study presents a co-electrospinning synthesis strategy to fabricate lightweight and porous Co@C composite nanofibres with wideband microwave attenuation capacity. The addition of MOF-derived Co additives enhances the low-frequency absorption performance.
Article
Chemistry, Physical
J. Snow, C. Olson, E. Torres, K. Shirley, E. Cazalas
Summary: This study investigates the use of a perovskite-based graphene field effect transistor (P-GFET) device for X-ray detection. The sensitivity and responsivity of the device were found to be influenced by factors such as X-ray tube voltage, current, and source-drain voltage. Simulation experiments were conducted to determine the dose rate and energy incident on the device during irradiation.
Article
Chemistry, Physical
Zuzana Jankovska, Lenka Matejova, Jonas Tokarsky, Pavlina Peikertova, Milan Dopita, Karolina Gorzolkova, Dominika Habermannova, Michal Vastyl, Jakub Belik
Summary: This study provides new insights into microwave-assisted pyrolysis of scrap tyres, demonstrating that it can produce microporous carbon black with potential application in xylene adsorption. Compared to conventional pyrolysis, microwave pyrolysis requires less time and energy while maintaining similar adsorption capacity.
Article
Chemistry, Physical
Max Bommert, Bruno Schuler, Carlo A. Pignedoli, Roland Widmer, Oliver Groning
Summary: A detailed understanding of the interaction between molecules and two-dimensional materials is crucial for incorporating functional molecular films into next-generation 2D material-organic hybrid devices. This study compares the energy level alignment of different-sized fullerenes on a Moire superstructure and finds that C-84 fullerenes can be either neutral or negatively charged depending on slight variations of the electrostatic potential. This discovery suggests a new path to achieve ambipolar charge transfer without overcoming the electronic gap of fullerenes.
Article
Chemistry, Physical
Yuanjing Cheng, Xianxian Sun, Ye Yuan, Shuang Yang, Yuanhao Ning, Dan Wang, Weilong Yin, Yibin Li
Summary: The dual-structure aerogel (GS) consisting of flexible silica fibers and graphene honeycomb structures exhibits excellent resilience, flexibility, and reliability. It also shows remarkable wave absorbing performance, making it an ideal candidate for microwave absorption applications such as flexible electronics and aerospace.
Article
Chemistry, Physical
Shuyu Fan, Yinong Chen, Shu Xiao, Kejun Shi, Xinyu Meng, Songsheng Lin, Fenghua Su, Yifan Su, Paul K. Chu
Summary: Graphene coatings are promising solid lubrication materials due to their mechanical properties. This study presents a new method for in situ deposition of high-quality graphene coatings on hard substrates using NiCo solid solution and competitive reaction strategies. The graphene coating deposited on substrates with deep NiCo solid solution demonstrates superior low-friction and durability.
Article
Chemistry, Physical
Mengdi Wang, Sanyin Qu, Yanling Chen, Qin Yao, Lidong Chen
Summary: The improved thermoelectric properties of conducting polymers are achieved by selectively capturing single-walled carbon nanotubes (SWNTs) in a conducting polymer film, leading to increased carrier mobility and reduced thermal conductivity. The resulting composite film exhibits significantly higher electrical conductivity and lower thermal conductivity compared to films with a mixture of SWNTs. This work provides a convenient and efficient method to enhance the thermoelectric properties of conducting polymers.
Review
Chemistry, Physical
Heng Wei, Weihua Li, Kareem Bachagha
Summary: This article reviews the research progress of carbon nanotube-based microwave absorbing materials (MAMs) in recent years, covering the fundamental theory, design strategies, synthesis methods, and future development directions.
Article
Chemistry, Physical
Chenguang Shi, Junlong Huang, Zongheng Cen, Tan Yi, Shaohong Liu, Ruowen Fu
Summary: This study developed a high-performance Li metal host material, which achieved dendrite-free Li deposition with a low nucleation overpotential and high Coulombic efficiencies through the combination of Ti3C2-g-PV4P sheets and Ag nanoparticles. The full cells assembled with the Li@host anode and LiFePO4 cathode exhibited high discharge capacity and excellent cycling stability, demonstrating a perspective design for future energy storage devices.
Article
Chemistry, Physical
Tomotaro Mae, Kentaro Kaneko, Hiroki Sakurai, Suguru Noda
Summary: A new partial prelithiation method for SiO/C-CNT electrodes was developed, which showed reduced irreversible capacity and achieved high energy densities with good reversibility. The method allows for precise control of the degree of prelithiation and is applicable to various chemistries.