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3D Printing of Periodic Porous Metamaterials for Tunable Electromagnetic Shielding Across Broad Frequencies

Nano-Micro Letters 2024年第12期16卷 533-552页

作者： Qinniu Lv Zilin Peng Haoran Pei Xinxing Zhang Yinghong Chen Huarong Zhang Xu Zhu Shulong Wu State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan UniversityNo.24 South Section 1Yihuan RoadChengdu 610065People’s Republic of China Baosheng Technology Innovation Corporation Limited No.1Suzhong RoadBaoying CountyYangzhou 225800People’s Republic of China

The new-generation electronic components require a balance between electromagnetic interference shielding efficiency and open structure factors such as ventilation and heat *** addition,realizing the tunable shielding of porous shields over a wide range of wavelengths is even more *** this study,the well-prepared thermoplastic polyurethane/carbon nanotubes composites were used to fabricate the novel periodic porous flexible metamaterials using fused deposition modeling 3D ***,the investigation focuses on optimization of pore geometry,size,dislocation configuration and material thickness,thus establishing a clear correlation between structural parameters and shielding *** experimental and simulation results have validated the superior shielding performance of hexagon derived honeycomb structure over other designs,and proposed the failure shielding size(D_(f)≈λ/8-λ/5)and critical inclined angle(θf≈43°-48°),which could be used as new benchmarks for tunable electromagnetic *** addition,the proper regulation of the material thickness could remarkably enhance the maximum shielding capability(85-95 dB)and absorption coefficient A(over 0.83).The final innovative design of the porous shielding box also exhibits good shielding effectiveness across a broad frequency range(over 2.4 GHz),opening up novel pathways for individualized and diversified shielding solutions.

关键词： polymeric component 3D printing Tunable electromagnetic shielding Periodic porous metamaterials Honeycomb pore structure

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Preliminary study on polyisoprene-modified natural rubber via in-situ polymerization of isoprene in deproteinized natural rubber latex

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Materials Today: Proceedings 2022年 66卷 2962-2966页

作者： Safuan, M.A. Ong, S.K. Solehah, M.N. Ibrahim, D.A. Hashim, A.S. Section of Polymer Engineering Technology Malaysian Institute of Chemical & Bioengineering Technology Universiti Kuala Lumpur Lot 1988 Kawasan Perindustrian Bandar Vendor Taboh Naning Melaka Alor Gajah 78000 Malaysia

Modification of natural rubber (NR) using vinyl monomers, particularly styrene, has been widely studied. Compared to unmodified NR, the resulting graft copolymer is stronger and stiffer but sacrificed on NR elasticity. This is because of the higher glass transition temperature (Tg) of styrene as compared to NR. Therefore, the modification of NR via isoprene monomer was investigated as isoprene will have the same Tg as NR. The focus of this research is to study the effect of in-situ polymerization of isoprene in deproteinized natural rubber (DPNR) latex with unmodified DPNR latex. The success of the modification was evidenced by the degree of conversion and Fourier Transform Infrared (FTIR). The average degree conversion of polyisoprene modified natural rubber (I-DPNR) obtained was 81.42%. Comparing the FTIR of I-DPNR and DPNR, the presence of trans-1,4 polyisoprene peaks and lower transmission of cis-1,4 polyisoprene was observed. The dynamic mechanical analysis (DMA) showed that I-DPNR and DPNR has a similar Tg. Stress–strain curves obtained from the tensile test of both the unvulcanized and vulcanized rubbers revealed that I-DPNR is more elastic as compared to the DPNR. These results obtained are consistent with the hypothesis that modification of NR with the isoprene monomer can result in similar properties as the DPNR. Higher elasticity reported for I-DPNR is a result of its higher entanglement as compared to unmodified NR. © 2022

关键词： Emulsion polymerization

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Redox-Active High-Performance Polyimides as Versatile Electrode Materials for Organic Lithium- and Sodium-Ion Batteries

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ACS Applied Materials and Interfaces 2024年第37期16卷 48722-48735页

作者： Lubis, Andre Lammiduk Baskoro, Febri Lin, Ting-Hsuan Wong, Hui Qi Liou, Guey-Sheng Yen, Hung-Ju Institute of Chemistry Academia Sinica 128 Academia Road Section 2 Nankang Taipei11529 Taiwan Academia Sinica and National Taiwan University Taipei11529 Taiwan Department of Chemical Engineering National Taiwan University Taipei10617 Taiwan Department of Chemical Engineering National Taiwan University of Science and Technology Taipei106 Taiwan Institute of Polymer Science and Engineering National Taiwan University Taipei10617 Taiwan

Organic electrode materials for rechargeable batteries show great promise for improving the storage capacity, reducing production costs, and minimizing environmental impact toward sustainability. In this study, we report a series of newly synthesized arylamine-based polyimides, TPPA-PIs, with three different bridge functionalizations on the imide rings and isomeric constituents that can work as versatile battery electrodes. As a lithium-ion battery cathode, a maximum energy density of 248 Wh kg-1 with high voltage operation up to 4.0 V can be achieved. As a lithium-ion battery anode, the TPPA-PIs showed a reversible storage capacity of 806 mA h g-1 at 100 mA g-1 current density with good rate capability up to a current density of 2000 mA g-1. Moreover, when applied as sodium-ion battery anodes, TPPA-PIs delivered an optimum specific capacity of up to 218 mA h g-1 after 50 cycles at a 50 mA g-1 current density and revealed a long cycling stability up to 1000 cycles under a high current density of 1000 mA g-1. More importantly, these electrochemical performances of TPPA-PIs are among the best compared with other reported polymer-based electrodes. The mechanistic studies show that both bridge functionalization on the imide units and isomerism impact the electrochemical performance by regulating their intrinsic properties such as charge storage behavior, ion diffusivity, and activation energy. We believe that such a detailed study of the structural design to electrochemical performance of these polymeric electrodes will offer insights into materials development and optimization for next-generation multifunctional energy storage devices in a wide range of applications. © 2023 American Chemical Society.

关键词： Sodium-ion batteries

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Alkali Metal Ion Substituted Carboxymethyl Cellulose as Anode polymeric Binders for Rapidly Chargeable Lithium-Ion Batteries

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Energy & Environmental Materials 2024年第1期7卷 77-82页

作者： Seoungwoo Byun Zhu Liu Dong Ok Shin Kyuman Kim Jaecheol Choi Youngjoon Roh Dahee Jin Seungwon Jung Kyung-Geun Kim Young-Gi Lee Stefan Ringe Yong Min Lee Department of Energy Science and Engineering Daegu Gyeongbuk Institute of Science and Technology(DGIST)Daegu 42988Korea ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang UniversityHangzhou 311215China Intelligent Sensors Research Section Electronics and Telecommunications Research Institute(ETRI)Daejeon 34129Korea Department of Advanced Device Technology University of Science and Technology(UST)Daejeon 34113Korea Intelligent Polymer Research Institute and ARC Centre of Excellence for Electromaterials Science University of WollongongWollongong NSW 2522Australia Department of Chemistry Korea UniversitySeoul 02841Korea Energy Science and Engineering Research Center Daegu Gyeongbuk Institute of Science and Technology(DGIST)Daegu 42988Korea

The increasing demand for short charging time on electric vehicles has motivated realization of fast chargeable lithium-ion batteries(LIBs).However,shortening the charging time of LIBs is limited by Li^(+)intercalation process consisting of liquid-phase diffusion,de-solvation,SEI crossing,and solid-phase ***,we propose a new strategy to accelerate the de-solvation step through a control of interaction between polymeric binder and solvent-Li^(+)*** this purpose,three alkali metal ions(Li^(+),Na^(+),and K^(+))substituted carboxymethyl cellulose(Li-,Na-,and K-CMC)are prepared to examine the effects of metal ions on their *** lowest activation energy of de-solvation and the highest chemical diffusion coefficient were observed for ***,Li-CMC cell with a capacity of 3 mAh cm^(-2)could be charged to>95%in 10 min,while a value above>85%was observed after 150 ***,the presented approach holds great promise for the realization of fast charging.

关键词： de-solvation digital twins fast charging graphite anodes polymeric binders

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The feasible application ofmicrofluidic tissue/organ-on-a-chip as an impersonator of oral tissues and organs:a direction for future research

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Bio-Design and Manufacturing 2023年第4期6卷 478-506页

作者： Nima Farshidfar Sahar Assar Mohammad Amin Amiri Sarina Sahmeddini Shahram Hamedani Moein Zarei Lobat Tayebi Orthodontic Research Center School of DentistryShiraz University of Medical SciencesShirazIran Section for Oral Ecology and Caries Control Department of Dentistry and Oral HealthAarhus UniversityAarhusDenmark Student Research Committee Shiraz University of Medical SciencesShirazIran Oral and Dental Disease Research Center School of DentistryShiraz University of Medical SciencesShirazIran Department of Polymer and Biomaterials Science Faculty of Chemical Technology and EngineeringWest Pomeranian University of TechnologySzczecinAl.Piastow 4571-311 SzczecinPoland Marquette University School of Dentistry MilwaukeeWI 53233USA

Currently,cell culture models play a key role in determining cell behavior under various ***,the accurate simulation of cellular behavior that imitates the body’s conditions remains a ***,to overcome this obstacle,three-dimensional cell culture models have been *** tissues/organs-on-chips(TOOCs)are new devices that have provided the opportunity to culture cells in a medium that is almost similar to the physiological conditions of the *** can be designed in simple or complex models,which are mostly fabricated by soft *** novel structures have been developed to mimic the conditions of various tissues and organs;however,microfluidic models for oral and dental tissues have not yet been widely *** application of TOOCs for oral tissues/organs can provide the opportunity to study cell interactions with biomaterials used in ***,TOOCs can provide the opportunity to study the cellular interactions and developmental stages of oral tissues/organs more *** review of the current advances in the field of TOOC development for oral tissues provides a comprehensive understanding of this burgeoning concept,shows the progress and applications of these novel models in the imitation of oral tissues/organs thus far,and reveals the limitations that TOOCs ***,it suggests further perspectives for future applications.

关键词： Microfluidics Tissue-on-a-chip Organ-on-a-chip Tooth-on-a-chip Oral mucosa-on-a-chip Salivary gland-on-a-chip

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Enhanced Removal of Tn in Shale Gas Wastewater by a Novel Porous polymer Monolith Immobilized Microorganisms

SSRN

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SSRN 2024年

作者： Shi, Shuling Tang, Peng Zhang, Xiang Chen, Guijing Yang, Chunyan Zhang, Di Li, Fengming Zhu, Mengting Yang, Ping Liu, Baicang College of Architecture and Environment Institute of New Energy and Low-Carbon Technology Institute for Disaster Management and Reconstruction Sichuan University Sichuan Chengdu610207 China Yibin Institute of Industrial Technology Sichuan University Yibin Park Section 2 Lingang Ave. Cuiping District Sichuan Yibin644000 China College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Sichuan Chengdu610065 China

Shale gas flowback and produced water (SGFPW) pose significant challenges to biotechnology due to their high salinity. In this study, we explored a novel method utilizing an amphiphilic copolymer of methyl methacrylate and acrylamide (p(MMA-AAM)) and powdered activated carbon (PAC) to modify poly(ether sulfone) (PES). We prepared a series of monoliths for microorganism immobilization using both thermal-induced phase separation and non-solvent-induced phase separation. Characterization of the monoliths via FTIR, SEM, BET analysis revealed improved hydrophilicity in the p(MMA-AAM)-modified monoliths and increased specific surface area (SSA) in monoliths with PAC addition. Particularly, the highest SSA was observed for the 0.5 g PAC (0.5-PAC/PES) monolith at 235.1861 m2/g. Wastewater treatment experiments demonstrated that the 0.5-PAC/PES system exhibited superior pollutant removal performance. It enhanced microbial immobilization efficiency and promoted microorganism growth, thereby boosting biological efficacy and pollutant removal efficiency. The 0.5-PAC/PES system achieved nearly 100% removal of NO3- and total nitrogen (TN) in simulated SGFPW. Besides, the removal rates of TN and total organic carbon (TOC) in actual SGFPW by the 0.5-PAC/PES system were 1.5 times and 1.3 times higher, respectively, than those achieved with suspended microorganisms. This work introduces a new approach to immobilize microorganisms, enhancing biological activity for SGFPW treatment under high salinity conditions. © 2024, The Authors. All rights reserved.

关键词： Microorganisms

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Enhanced Removal of Tn in Shale Gas Wastewater by a Novel Porous polymer Monolith Immobilized Microorganisms

SSRN

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SSRN 2024年

作者： Shi, Shuling Tang, Peng Zhang, Xiang Chen, Guijing Yang, Chunyan Zhang, Di Li, Fengming Zhu, Mengting Yang, Ping Liu, Baicang Key Laboratory of Deep Earth Science and Engineering Ministry of Education College of Architecture and Environment Institute of New Energy and Low-Carbon Technology Institute for Disaster Management and Reconstruction Sichuan University Sichuan Chengdu610207 China Yibin Institute of Industrial Technology Sichuan University Yibin Park Section 2 Lingang Ave. Cuiping District Yibin Sichuan644000 China College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Sichuan Chengdu610065 China

关键词： Wastewater treatment

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Enhanced Removal of Tn in Shale Gas Wastewater by a Novel Porous polymer Monolith Immobilized Microorganisms

SSRN

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SSRN 2024年

作者： Shi, Shuling Tang, Peng Zhang, Xiang Chen, Gui-Jing Yang, Chunyan Zhang, Di Li, Fengming Zhu, Mengting Yang, Ping Liu, Baicang Key Laboratory of Deep Earth Science and Engineering Ministry of Education College of Architecture and Environment Institute of New Energy and Low-Carbon Technology Institute for Disaster Management and Reconstruction Sichuan University Sichuan Chengdu610207 China Yibin Institute of Industrial Technology Sichuan University Yibin Park Section 2 Lingang Ave. Cuiping District Sichuan Yibin644000 China College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Sichuan Chengdu610065 China

关键词： Microorganisms

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Microwave-assisted synthesis of Pd-Ru-Re/f-MWCNTs nanocatalyst for efficient catalytic reduction of chromium and pesticide

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Colloids and Surfaces A: Physicochemical and engineering Aspects 2023年第1期673卷

作者： Veerakumar, Pitchaimani Sangili, Arumugam Chen, Shen-Ming Manavalan, Shaktivel Karuppusamy, Naveen Chennai600 077 India Department of Chemistry National Taiwan University No. 1 Roosevelt Road Section 4 Taipei10617 Taiwan Electroanalysis and Bioelectrochemistry Lab Department of Chemical Engineering and Biotechnology National Taipei University of Technology No.1 Section 3 Chung-Hsiao East 8 Road Taipei106 Taiwan Institute of Polymer Science and Engineering National Taiwan University 1 Roosevelt Road 4th Sec Taipei10617 Taiwan

Hexavalent chromium (Cr(VI)) and imidacloprid (IMI, pesticide) are well recognized as an acute hazardous pollutant in living environments. Herein, palladium-ruthenium-rhenium colloidal particles decorated on functionalized multi-walled carbon nanotubes (Pd-Ru-Re/f-MWCNTs) was synthesized via simple microwave (MW) method. The as-synthesized nanocatalyst was confirmed through PXRD, FE-TEM, FE-SEM-EDX, XPS, UV–vis, and FT-IR measurement. These reduction catalytic activity tested towards Cr(VI) and IMI pollutants evaluated using formic acid (FA), and compared to commercial Pd/C catalyst. FA act as green reducing agent. Because of to its well-dispersed ultrafine Pd-Ru-Re colloidal NPs, the synergistic impact between metal colloidal NPs and f-MWCNTs supports, and availability of multiple active sites, which are crucial for the rapid catalytic reduction process. Moreover, this catalyst additionally shown outstanding recyclability and strong stability with rate constants. The study provided new perspectives on the catalytic removal of Cr(VI) and IMI for the treatment of industrial wastewater. © 2023 Elsevier B.V.

关键词： Palladium

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Ovarian Cancer Biomarker Ca-125 Based on Ultrasensitive Sandwich Type Detection by Electrochemical Immunosensor

SSRN

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SSRN 2022年

作者： Krathumkhet, Nattinee Imae, Toyoko Wang, Fu-Ming Gaol, Jusni Manidae Lumban Paradee, Nophawan Sustainable Polymer & Innovative Composite Materials Research Group Department of Chemistry Faculty of Science King Mongkut's University of Technology Thonburi 126 Pracha Uthit Road Bangmod Thungkru Bangkok10140 Thailand Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology 43 Keelung Road Section 4 Taipei10607 Taiwan Department of Materials Science and Engineering National Taiwan University of Science and Technology 43 Keelung Road Section 4 Taipei10607 Taiwan Department of Chemical Engineering National Taiwan University of Science and Technology 43 Keelung Road Section 4 Taipei10607 Taiwan

In this work, we demonstrate a novel cancer antigen 125 (CA125) biomarker detection based on electrochemically immunisensor. The biomarker on conductive composite materials of carbon ink/carbon dot/zine oxide (C-ink/CD/ZnO) was employed as an electrode platform by using ITO substrate to enhance the interaction of antibodies (Ab) with supporting catalytic performance of ZnO as a labeling signal molecule. They are showed scientist attention for biosensor with chemical stability, strong biocompatibility, high conductive signal, and accuracy. Moreover, the nanocomposite of silver@polypyrrole (Ag@PPy) was used as a potential redox mediator. The labeled construction with Ag@PPy showed more accuracy than that of a free-labeled. The created immunosensor was a wide linear range (100 ng•mL−1 −0.001 fg•mL−1) and a low limitation of detection as 0.1 fg•mL−1 under optimal condition. This suggested that the immunosensor is an accurate and efficient diagnostic tool for CA125 and other biomarkers detection in actual sample analysis for clinic. © 2022, The Authors. All rights reserved.

关键词： Zinc oxide

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