Article
Crystallography
Bin Fang, Jing Wei, Shuling Qiu, Jianan Zhu, Lin Wu, Yiguo Li
Summary: By controlled stepwise evaporative crystallization, double ring-banded PEA spherulites consisting of periodically twisted lamellae are formed in solution-cast films, and a novel transitional morphology of negatively birefringent, single ring-banded PEA spherulites is also reported.
JOURNAL OF CRYSTAL GROWTH
(2021)
Article
Polymer Science
Lanfang Hu, Xun Zhang, Xiaohan Cao, Danjing Chen, Yue Sun, Chengjian Zhang, Xinghong Zhang
Summary: The study presents an easy and efficient method to synthesize semicrystalline polyesters via copolymerization of IBO and cyclic anhydrides, yielding polymers with high alternation degree, high molecular weights, and elevated melting temperatures. Besides, by manipulating the cis/trans isomerization of the C=C bond, unsaturated polyesters can exhibit a unique crystalline-amorphous-crystalline transformation.
Review
Food Science & Technology
A. R. Alias, M. Khairul Wan, N. M. Sarbon
Summary: This paper provides an overview of the development of biodegradable natural polymer multi-layer films for packaging applications in the food industry. It discusses the properties of different polymers used in multi-layer packaging and highlights the advantages of using multi-layer films in terms of physical, mechanical, and gas barrier properties. The results show that multi-layer films outperform single-layer films in these aspects. Suggestions for future research on the compatibility of multi-layer films in packaging applications are also addressed in this review.
Article
Polymer Science
Baihui Li, Yue Zhao, Xiaotong Chen, Zhiqi Wang, Jun Xu, Weichao Shi
Summary: The crystallization behavior of double emulsion droplets formed by PBA, PCL, and their blends was studied. It was found that crystal growth drives spherical liquid droplets to anisotropic solid microcapsules with orientation-sensitive birefringence. The composition of two polymers can regulate the transition from PBA-dominated shell to PCL-dominated shell.
Article
Physics, Applied
Go Itami, Osamu Sakai
Summary: This study demonstrates the formation of Dirac cone using double-layer ring dipole arrays (RDAs) and proposes a method for dynamically controlling the band gap. It is found that the Dirac cone appears at the optimum separation in double-layer RDAs and the band gap can be formed and controlled by decreasing the separation between the two layers. This research has significant implications for the development of new applications for artificial electronic materials.
PHYSICAL REVIEW APPLIED
(2023)
Article
Engineering, Civil
Ruoqiang Feng, Shen Liu, Chenglong Dai
Summary: Through experimental and numerical studies, it was found that the reticulated shell with double-ring joints does not damage the joints when the structure fails, with a buckling capacity of about 70% of the rigidly jointed shell. The nonlinear buckling capacity and initial stiffness of the reticulated shell with double-ring joints are approximately 66% of that of the rigidly jointed shell.
ENGINEERING STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Roman Stano, Jan Smrek, Christos N. Likos
Summary: Concentrated solutions of semiflexible polyelectrolyte ring polymers can form nanoscopic cylindrical stacks, and the morphology and dynamics of these clusters can be controlled by the presence of counterions. Addition of trivalent ions stabilizes the formation of clusters, while monovalent ions affect the density of the clusters.
Article
Multidisciplinary Sciences
Serena R. Alfarano, Simone Pezzotti, Christopher J. Stein, Zhou Lin, Federico Sebastiani, Sarah Funke, Claudius Hoberg, Inga Kolling, Chun Yu Ma, Katja Mauelshagen, Thorsten Ockelmann, Gerhard Schwaab, Li Fu, Jean-Blaise Brubach, Pascale Roy, Martin Head-Gordon, Kristina Tschulik, Marie-Pierre Gaigeot, Martina Havenith
Summary: The study combines experiments and simulations to provide a molecular picture of double-layer formation under applied voltage, showing the stripping away of cation/anion hydration shells for an NaCl electrolyte at the Au surface at varying bias potentials. Results indicate that Na+ is attracted towards the electrode at the smallest negative potentials, while stripping of the Cl- hydration shell occurs only at higher potential values. The phenomena are measured directly by THz spectroscopy using ultrabright synchrotron light and rationalized by molecular dynamics simulations and electronic-structure calculations.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Materials Science, Multidisciplinary
Yun Liu, Yuan Zhang, Rui-Ning Zheng, Ya-Qi Zheng, Lian-Sheng Chen
Summary: Novel degradable Zn-1 Mg-0.25Nd-xSn alloys were fabricated and investigated for their microstructure, degradation, and film formation mechanism using various microscopy techniques. The optimal corrosion rate was observed in the Zn-1 Mg-0.25Nd-0.3Sn alloy, attributed to the formation of insoluble compounds and reduction in reaction activities of the Zn matrix. Incorporation of rare earth products into the passive layer also contributed to the uniform and dense degradation layer.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Ceramics
Weiwei Cao, Bo Wang, Yang Yang, Bingli Zhu, Junjiang Guo, Peng Xu, Xiaohong Bai, Junjun Qin, Chao Wang, Jingping Zhu, Yonglin Bai
Summary: In this study, an Al2O3/MgO double-layer structure was fabricated as a secondary electron emission layer using ALD technology. Various tests were conducted to evaluate its performance, revealing that the SEY value of the Al2O3/MgO double-layer decreased as the Al2O3 thickness increased, which is beneficial for its application in the channels of microchannel plates.
CERAMICS INTERNATIONAL
(2021)
Article
Electrochemistry
Sofia B. Davey, Amanda P. Cameron, Kenneth G. Latham, Scott W. Donne
Summary: This study used step potential electrochemical spectroscopy to characterize the dynamics of charge storage on a planar non-porous glassy carbon electrode in an aqueous electrolyte, revealing diffuse nature of electrolyte charge storage that extends a substantial distance even for concentrated electrolytes. This finding challenges the expected parallel planes of charge for double layer formation at the interface and has implications for the use of porous materials.
ELECTROCHIMICA ACTA
(2021)
Article
Physics, Applied
M. C. Marshall, M. G. Gorman, D. N. Polsin, J. H. Eggert, M. K. Ginnane, J. R. Rygg, G. W. Collins, L. D. Leininger
Summary: We present measurements of diamond formation in doubly shocked epoxy and find that diamond can precipitate not only from carbon and hydrogen-based polymers but also from polymers with the addition of oxygen, nitrogen, and chlorine.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Golrokh Akhgar, Qile Li, Iolanda Di Bernardo, Chi Xuan Trang, Chang Liu, Ali Zavabeti, Julie Karel, Anton Tadich, Michael S. Fuhrer, Mark T. Edmonds
Summary: Understanding the air stability of MnBi2Te4 thin films is crucial for electronic devices. After exposure to air, a 2 nm thick oxide layer forms on the surface, protecting the underlying layers. The samples still exhibit metallic conduction and minimal doping. This research opens up new possibilities for handling and preparing MnBi2Te4 devices.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Composites
Yudong Liang, Yan Xiong, Jiajia Zheng, Zuoxiang Xie, Chao Chen, Ling Xu
Summary: This research investigates the thermoelectric properties of Tellurium (Te) and Poly(3,4ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hybrid composite thin film as well as double-layer structured of PEDOT/Te thin film. The results show that the PEDOT:PSS/Te double-layer structure offers improved conductivity and Seebeck coefficient compared to the hybrid structure, due to the formation of an ohmic contact interface between PEDOT:PSS and Te. The study provides experimental and theoretical support for the development of thin-film thermoelectric materials and devices.
COMPOSITES COMMUNICATIONS
(2021)
Article
Polymer Science
Mathias Stanzel, Ulrike Kunz, Annette Andrieu-Brunsen
Summary: By selectively functionalizing the double-layer mesoporous films, asymmetrical charge distribution was achieved, enhancing the transport properties of ionic species.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Juan Zhang, Andrew N. Keith, Sergei S. Sheiko, Xuehui Wang, Zhigang Wang
Summary: In order to mimic the mechanical behaviors of skin, a reprocessable bottlebrush copolymer elastomer was designed with renewable and rigid cellulose as backbones, while poly(n-butyl acrylate)-b-poly(methyl methacrylate) (PBA-b-PMMA) diblocks were designed as grafted side chains. The resulting elastomers underwent a step-cyclic tensile deformation, leading to internal structures becoming oriented nanofibers and exhibiting stress-strain behaviors similar to real skin. Our current research work is expected to be important in the development of a series of biomimetic skinlike polymer materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Multidisciplinary
Huagao Fang, Wujin Ye, Kangjie Yang, Kai Song, Haibing Wei, Yunsheng Ding
Summary: Segregated MWCNTs/epoxy composites demonstrate a low conductive percolation threshold at 0.066 wt% and an EMI SE of 22 dB even with only 2 wt% loading of MWCNTs, achieving mechanical robustness and structural integrity.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Chemical
Cui Xu, Juan Zhang, Jing Bai, Shuangshuang Ding, Xuehui Wang, Zhigang Wang
Summary: In this study, long-chain branched polylactide (LCB PLA)/poly(D-lactic acid) (PDLA) blends with different low amounts of PDLA were prepared by a solution blending method. The formation of stereocomplex (SC) crystallites in the blends and their content increase with higher PDLA composition were confirmed through differential scanning calorimetry (DSC) and dynamic rheological frequency sweep. The morphological evolution during crystallization at 130 degrees C was traced by polarized optical microscopy (POM), revealing the separate growths of SC crystallites and PLA homocrystallites, and the crystallization kinetics were studied by rheometry, accelerated with increasing PDLA composition mainly due to nucleation density enhancement.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Polymer Science
Hang Li, Juan Zhang, Feng Wei, Juan Yan, Zhen Da, Yijian Chu, Xuehui Wang, Zhigang Wang
Summary: The study examined the influence of different processing conditions on the glass transition of soft PVC compounds filled with calcium carbonate. It was found that using a one-step procedure for adding CaCO3 powder, increasing the discharge temperature, or using a higher mixing frequency can shift the glass transition temperature of the plasticized PVC component to lower values in soft PVC compounds. Additionally, the one-step procedure is preferred over the two-step procedure for preparing soft PVC compounds with lower glass transition temperatures.
JOURNAL OF POLYMER RESEARCH
(2021)
Article
Chemistry, Physical
Yaqiong Zhang, Jiawei Chen, Shuangshuang Ding, Weiming Kong, Mingxin Xing, Mang Wu, Zhigang Wang, Zhongkai Wang
Summary: By blending PLA with EGMA and PUDA-co-BUDA, the impact strength of PLA can be significantly improved, along with enhanced stretchability. The unique particle microstructures in the ternary blend and interfacial adhesions between components play crucial roles in achieving these improvements.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Chemical
Fan Zhang, Wujin Ye, Wenjuan Zhou, Xinchen Gao, Huagao Fang, Yunsheng Ding
Summary: In this study, the selective distribution of multiwalled carbon nanotubes and hexagonal boron nitride in an epoxy vitrimer matrix was achieved through compression molding, resulting in polymer composites with enhanced thermal conductivity and electrical insulation.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Polymer Science
Cui Xu, Shuangshuang Ding, Xin Liu, Feng Wang, Yulin Shi, Xuehui Wang, Zhigang Wang
Summary: This study found that mechanical tensile properties of thermoplastic polyurethanes (TPUs) can be greatly improved by step-cycle tensile deformation, especially for PTMG-based and PCL-based TPUs. The formation of oriented microstructures at lower strains is crucial for achieving high strength TPUs.
Article
Engineering, Chemical
Xin Liu, Shuangshuang Ding, Feng Wang, Yulin Shi, Xuehui Wang, Zhigang Wang
Summary: The dependencies of energy dissipation during deformation on the microstructures of two typical commercial TPUs were investigated. The selection of suitable hard segment domains plays a key role in controlling the energy dissipation of TPUs during deformation.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Zhaofei Wang, Xuemin Zhang, Wansheng Yao, Yong Dong, Baiyao Zhang, Xiaoyu Dong, Huagao Fang, Guobing Zhang, Yunsheng Ding
Summary: This study presents the design and synthesis of cross-linked thermosetting waterborne polyurethanes (WPUs) with excellent reprocessability. The cross-linked WPUs exhibit classic vitrimer performance and high mechanical properties, with a recovery ratio of over 80% for the recycled samples. Moreover, the cross-linked WPUs show significant antibacterial activity. This research provides a new method for the reprocessing of thermosetting WPUs and demonstrates the potential of WPU CANs as sustainable materials.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Polymer Science
Huagao Fang, Xingchen Gao, Fan Zhang, Wenjuan Zhou, Guobin Qi, Kai Song, Sheng Cheng, Yunsheng Ding, H. Henning Winter
Summary: This study introduces the vitrimer chemistry of boronic transesterification into a triblock thermoplastic elastomer, enabling associative bond exchange in its nanoscale domains. The localized dynamic cross-linking improves the material's creep resistance and allows for reprocessing. The study also explores the potential application of the elastomer as a hot-melt adhesive, showing excellent lap shear strength.
Article
Biochemistry & Molecular Biology
Huanjuan Sun, Xuehui Wang, Quan Chen, Zhigang Wang
Summary: A series of cellulose-graft-diblockbottlebrushcopolymer elastomers with short side chains were synthesized to study the influence of composition and length of the graft diblock side chains on microphase morphologies and properties. The microphase-separated morphologies were observed by atomic force microscopy and small-angle X-ray scattering. These elastomers possessed enhanced mechanical properties due to the self-assembly of the outer block into hard microdomains. The rheological behaviors were analyzed to establish the connection between microstructures and properties for high-performance thermoplastic elastomer applications.
Article
Polymer Science
Huagao Fang, Fan Zhang, Yongpu Zhao, Xingchen Gao, Wenjuan Zhou, Guobin Qi, Yunsheng Ding, H. Henning Winter
Summary: Liquid crystal elastomer networks (LCEs) are highly versatile materials with unique mechanical and optical properties. The addition of dynamic covalent bonds allows for network renewal and further opportunities. Through increasing the content of liquid crystal mesogens (LCM), elastomeric vitrimer epoxies (EV, m-EV, and vLCE) were synthesized with varying rheological properties. The specific contributions of the smectic structure in vLCE were discussed, and the underlying mechanisms were explored.
Article
Engineering, Electrical & Electronic
Guangsheng Deng, Linjie Wang, Baihong Chi, Huagao Fang, Jingyao Sun, Ying Li, Jun Yang, Zhiping Yin
Summary: This letter proposes a novel way of realizing broadband absorbers with a block building method, which broadens their absorptivity to different application scenarios. The self-supported carbon nanotube-cellulose nanocrystal (CNT-CNC) film, acting as a resistive layer, can be synthesized independently of selecting substrates, making it easy to replace and meet different application requirements. Experimental demonstration of a high temperature-resistant and self-repairing EM wave absorber incorporating the CNT-CNC film with ceramics and supramolecular thermoplastic urethane substrates shows the effectiveness of the block building method.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Polymer Science
Jia Wang, Cui Xu, Juan Zhang, Xue-hui Wang, Zhi-gang Wang
Summary: In this study, crosslinked PCL/SAN blends were prepared using electron beam irradiation, showing that PCL and SAN components were compatible. It was observed that crystallization kinetics slowed down with increasing SAN content, and also slowed down with increased degree of crosslinking.
ACTA POLYMERICA SINICA
(2021)
Article
Chemistry, Multidisciplinary
Kai Song, Wujin Ye, Xingchen Gao, Huagao Fang, Yaqiong Zhang, Qi Zhang, Xueliang Li, Shanzhong Yang, Haibing Wei, Yunsheng Ding
Summary: The novel supramolecular polyurethane elastomers (SPUEs) developed in this study achieved mechanical robustness and highly efficient self-healing at room temperature, demonstrating the highest tensile toughness for self-healable polymers and excellent ultimate tensile strength and fracture energy.
MATERIALS HORIZONS
(2021)
Article
Chemistry, Multidisciplinary
Abu Talha Aqueel Ahmed, Sankar Sekar, Shubhangi S. Khadtare, Nurul Taufiqu Rochman, Bathula Chinna, Abu Saad Ansari
Summary: In this study, MnCo2S4 nanosheet catalyst was successfully synthesized and found to exhibit superior performance in hydrogen evolution. Compared to MnCo2S4, MnCo2S4 showed low overpotentials, moderate Tafel slope, and excellent sustainability. The outstanding performance can be attributed to the increased number of electrochemically active sites and enhanced electronic conductivity on the catalyst surface.
Article
Chemistry, Multidisciplinary
Victor V. Maltsev, Elena A. Volkova, Elizaveta V. Koporulina, Diana D. Mitina, Vladimir L. Kosorukov, Anna I. Jiliaeva, Daniil A. Naprasnikov, Konstantin N. Gorbachenya, Viktor E. Kisel
Summary: The phase relationships, crystal properties and luminescence kinetics of two complex systems were studied, including unit cell parameters, segregation coefficients of impurities, and lifetimes of energy levels.
Article
Chemistry, Multidisciplinary
Xiaoman Zhang, Wangwang Xu, W. J. Meng, Andrew C. Meng
Summary: This study successfully grew high-quality single crystal AlScN nanowires through ultra-high vacuum reactive sputtering technique and characterized their structure and properties. The nanowires exhibit significantly reduced mosaic spread and predominantly single ferroelectric domains, as well as a high piezoelectric constant.
Article
Chemistry, Multidisciplinary
Tom E. de Vries, Elias Vlieg, Rene de Gelder
Summary: Networks are important for describing relationships between people, roads between cities, reactions between chemicals, and other interactions. Bipartiteness, dividing the network into two groups, can facilitate the study of the network's structure. We have developed an algorithm that can find a near-optimal bipartisation within a reasonable time frame and used it to uncover the hidden structure of the CSD cocrystal network.
Article
Chemistry, Multidisciplinary
Chuchu Han, Jing Yang, Xin Zhang, Aisen Li, Jiang Peng
Summary: An elastic crystal based on a photo-reactive acylhydrazone derivative is reported, which exhibits reversible bending behavior under UV irradiation and heating. The crystal undergoes reversible E<->Z isomerization under light and heating conditions. The crystal demonstrates excellent elastic properties and the bending can be controlled to control the output direction of red light.
Article
Chemistry, Multidisciplinary
Lingfeng Zhang, Yu Wang, Yefeng Wang, Shuai Liu, Na Zhang, Mingmin Yang, Haixia Ma, Zhaoqi Guo
Summary: This study designs and synthesizes a series of high-energy salts compounds without heavy metal ions and azide groups. The molecular structures and stability of the compounds are confirmed through single-crystal X-ray diffraction and intermolecular interaction analysis. Furthermore, the thermal stability, energetic properties, and electrical initiation properties of the compounds are investigated, suggesting their potential as primary explosives.
