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direct ink writing of multifunctional gratings with gel-like MXene/norepinephrine ink for dynamic electromagnetic interference shielding and patterned Joule heating

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Nano Research 2024年第3期17卷 1585-1594页

作者： Pei-Zhu Jiang Zhiming Deng Peng Min Lvxuan Ye Cheng-Zhang Qi Hao-Yu Zhao Ji Liu Hao-Bin Zhang Zhong-Zhen Yu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China School of Chemistry CRANN and AMBERTrinity College DublinDublin D02PN40Ireland

Intelligent electromagnetic interference(EMI)shielding modulators with a wide tuning range and cyclic stability are urgently needed but their fabrication remains challenging.A gel-like MXene/norepinephrine ink is developed and multifunctional MXene gratings with wide EMI shielding effectiveness(SE)tuning range,superior reversibility,and high mechanical flexibility are constructed by direct ink writing approach for dynamic EMI shielding and patterned Joule heating *** modulable MXene/norepinephrine grating with a high conductivity of 3510 S·cm-1 can conveniently realize the seamless modulation of the EMI SE by adjusting the angle between the MXene grating filaments and the electric field of the incident electromagnetic waves,offering highly reversible switching between shielding“On”(28.0 dB)and“Off”(0.5 dB)***,due to the optimized integration of the MXene ink and the rationally designed pattern,a superior specific EMI SE of 95,688.2 dB·cm^(2)·g^(-1) is achieved in the“On”***,the MXene/norepinephrine ink can be used to fabricate many complex patterned gratings with superior stability,instant responsibility,and superb mechanical flexibility,exhibiting a unique patterned Joule heating *** writing of multifunctional gratings paves a means for developing intelligent EMI shielding materials,wearable electronic devices,and advanced thermal management materials.

关键词： MXene ink direct ink writing electromagnetic interference shielding multifunctional gratings Joule heating

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direct ink writing of conductive materials for emerging energy storage systems

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Nano Research 2022年第7期15卷 6091-6111页

作者： Ting Huang Wenfeng Liu Chenliang Su Ya-yun Li Jingyu Sun College of Materials Science and Engineering Shenzhen Key Laboratory of Special Functional Materials&Shenzhen Engineering Laboratory for Advance Technology of CeramicsShenzhen UniversityShenzhen 518060China College of Energy Soochow Institute for Energy and Materials InnovationsJiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou 215006China Institute of Microscale Optoelectronics International Collaborative Laboratory of 2D Materials for Optoelectronic Science&Technology of Ministry of EducationShenzhen UniversityShenzhen 518060China

direct ink writing(DIW)has recently emerged as an appealing method for designing and fabricating three-dimensional(3D)*** 3D structures can be built layer-by-layer via digitally controlled extrusion and deposition of aqueous-based colloidal *** formulation of well-dispersed suspensions with specific rheological behaviors is a prerequisite for the use of this *** this review article,the fundamental concepts of DIW are presented,including the operation principles and basic *** strategies used for ink formulation are discussed with a focus on the most widely used electrode materials,including graphene,Mxenes,and carbon *** recent progress in printing design of emerging energy storage systems,encompassing rechargeable batteries,supercapacitors,and hybrid capacitors,is *** and future perspectives are also covered to provide guidance for the future development of DIW.

关键词： direct ink writing energy storage ink formulation conductive materials structure-performance relationship

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direct ink writing of Highly Conductive MXene Frames for Tunable Electromagnetic Interference Shielding and Electromagnetic Wave-Induced Thermochromism

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Nano-Micro Letters 2021年第10期13卷 14-28页

作者： Xinyu Wu Tingxiang Tu Yang Dai Pingping Tang Yu Zhang Zhiming Deng Lulu Li Hao-Bin Zhang Zhong-Zhen Yu State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China

The highly integrated and miniaturized next-generation electronic products call for high-performance electromagnetic interference(EMI)shielding materials to assure the normal operation of their closely assembled ***,the most current techniques are not adequate for the fabrication of shielding materials with programmable structure and controllable shielding ***,we demonstrate the direct ink writing of robust and highly conductive Ti3C2Tx MXene frames with customizable structures by using MXene/AlOOH inks for tunable EMI shielding and electromagnetic wave-induced thermochromism *** as-printed frames are reinforced by immersing in AlCl_(3)/HCl solution to remove the electrically insulating AlOOH nanoparticles,as well as cross-link the MXene sheets and fuse the filament interfaces with aluminum *** freeze-drying,the resultant robust and porous MXene frames exhibit tunable EMI shielding efficiencies in the range of 25-80 dB with the highest electrical conductivity of 5323 S m−***,an electromagnetic wave-induced thermochromic MXene pattern is assembled by coating and curing with thermochromic polydimethylsiloxane on a printed MXene pattern,and its color can be changed from blue to red under the high-intensity electromagnetic *** work demonstrates a direct ink printing of customizable EMI frames and patterns for tuning EMI shielding efficiency and visualizing electromagnetic waves.

关键词： MXene Electromagnetic interference shielding direct ink writing Electrical conductivity Thermochromism

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direct ink writing to fabricate porous acetabular cups from titanium alloy

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Bio-Design and Manufacturing 2023年第2期6卷 121-135页

作者： Naima Valentin Weijian Hua Ashish K.Kasar Lily Raymond Pradeep L.Menezes Yifei Jin Mechanical Engineering Department University of NevadaRenoRenoNV 89557USA

Acetabular cups,which are among themost important implants in total hip arthroplasty,are usually made from titanium alloys with high porosity and adequate mechanical *** current three-dimensional(3D)printing approaches to fabricate customized acetabular cups have some inherent disadvantages such as high cost and energy consumption,residual thermal stress,and relatively low ***,in this work,a direct ink writing method was developed to print a cup structure at room temperature,followed by multi-step heat treatment to form microscale porous structure within the acetabular *** method is facilitated by the development of a self-supporting titanium-6 aluminum-4 vanadium(Ti64)ink that is composed of Ti64 particles,bentonite yield-stress additive,ultraviolet curable polymer,and *** effects of Ti64 and bentonite concentrations on the rheological properties and printability of inks were systematically ***,the printing conditions,geometrical limitations,and maximum curing depth were ***,some complex 3D structures,including lattices with different gap distances,honeycomb with a well-defined shape,and an acetabular cup with uniformly distributed micropores,were successfully printed/fabricated to validate the effectiveness of the proposed method.

关键词： Acetabular cup direct ink writing Titanium alloy Bentonite Heat treatment

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direct ink writing of 3D-Honeycombed CL-20 structures with low critical size

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Defence Technology（防务技术） 2020年第3期16卷 588-595页

作者： Bao-yun Ye Chang-kun Song Hao Huang Qian-bing Li Chong-wei An Jing-yu Wang School of Environment and Safety Engineering North University of China030051 TaiyuanChina Shanxi Engineering Technology Research Center for Ultrafine Powder North University of China030051 TaiyuanChina China North Industries Group Corporation Limited 100821BeijingChina

3D-Honeycombed CL-20 structures with low critical size of detonation have been fabricated successfully for intelligent weapon systems using a micro-flow direct ink writing(DIW) *** CL-20-based explosive ink for DIW technology was prepared by a two-component adhesive system with waterborne polyurethane(WPU) and ethyl cellulose(EC).Not only the preparation of the explosive ink but also the principle of DIW process have been investigated *** explosive ink displayed stro ng shea rthinning behavior that permitted layer-by-laye r deposition from a fine nozzle onto a substrate to produce complex *** EC content was varied to alter the pore structure distribution and rheological behavior of ink samples after *** deposited explosive composite materials are of a honeycombed structure with high porosity,and the pore size distribution increases with the increase of EC *** phase change was observed during the preparation *** WPU and EC show good compatibility with CL-20 *** high activation energy was realized in the CL-20-based composite ink compared with that of the refined CL-20 due to the presence of non-energetic but stable *** detonation performance of the composite materials can be precisely controlled by an adjustment in the content of *** 3D honeyco mbed CL-20 structures,which are fabricated by DIW technology,have a very small critical detonation size of less than 69 μm,as demonstrated by wedge shaped charge *** ink can be used to create 3D structures with complex geometries not possible with traditional manufacturing techniques,which presents a bright future for the development of intelligent weapon systems.

关键词： Hexanitrohexaazaisowurtzitane(CL-20) direct ink writing Micro-electro-mechanical system(MEMS) Pore structure Detonation performance

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direct ink writing of polycaprolactone/polyethylene oxide based 3D constructs

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Progress in Natural Science:Materials International 2021年第2期31卷 180-191页

作者： Bin Zhang Se Hun Chung Susan Barker Duncan Craig Roger J.Narayan Jie Huang Department of Mechanical Engineering University College London Medway School of Pharmacy Universities of Greenwich and Kent School of Pharmacy University College London Joint Department of Biomedical Engineering University of North Carolina and North Carolina State University

There has been increasing interest over recent years in the application of three-dimensional(3 D) printing technologies in the biomedical field. One such method is direct ink writing(DIW); this approach has the potential advantage of allowing room-temperature deposition of materials, presented as an ink, to build complex architectures. DIW offers the ability to process biomaterials containing temperature-sensitive components. Due to the fabrication principles of DIW, there are specific rheological requirements that the ink must exhibit for the 3 D construction. For this reason, hydrogel-based liquid feed stocks have been the focal point of ink development. As a consequence, studies based on inks comprising hydrophobic biomaterials, which are insoluble in water and hence unsuited to the hydrogel approach, have been *** this study, we investigate novel inks that utilize polycaprolactone(PCL), a hydrophobic polymer, as the primary constituent by dissolving the polymer in solvent systems based on dichloromethane(DCM) and acetone(ACE). Moreover, polyethylene oxide(PEO) was incorporated into the PCL systems in order to extend the range of hydrophilicity of the systems. The rheological properties of the inks were investigated as a function of polymer composition and solvent system. Woodpile constructs of PCL and PCL/PEO were fabricated using DIW method and were assessed by a series of material characterisation. The type of solvent system had a noticeable impact on the ink rheology, which ultimately affected the surface properties. The incorporation of PEO particularly enhanced the roughness and wettability of the constructs. Our results support the use of DIW as a new means to process hydrophobic polymers for biomedical applications.

关键词： direct ink writing Polycaprolactone Polyethylene oxide ink rheology Material characterisation 3D construct

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direct ink writing of metal-based electrocatalysts for Li–S batteries with efficient polysulfide conversion

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Interdisciplinary Materials 2023年第4期2卷 589-608页

作者： Ting Meng Zeyu Geng Fei Ma Xiaohan Wang Haifeng Zhang Cao Guan Xi'an Key Laboratory of Flexible Electronics Institute of Flexible ElectronicsNorthwestern Polytechnical UniversityXi'anChina Key laboratory of Flexible Electronics of Zhejiang Province Ningbo Institute of Northwestern Polytechnical UniversityNingboChina

Thanks to the significantly higher energy density compared with universal commercialized Li-ion batteries,lithium–sulfur(Li–S)batteries are being investigated for use in prospective energy storage ***,the inadequate electrochemical kinetics of reactants and intermediates hinder commercial *** limitation results in substantial capacity degradation and short battery lifespans,thereby impeding the battery's power ***,the capacity attenuation induced by the undesirable shuttle effect further hinders their *** effort has been invested in developing electrocatalysts to fix lithium polysulfides and boost their conversion *** the conventional process,the planar electrodes are prepared by slurry-casting,which limits the electron and ion transfer paths,especially when the thickness of the electrodes is relatively *** with traditional manufacturing methods,direct ink writing(DIW)technology offers unique advantages in both geometry shaping and rapid prototyping,and even complex three-dimensional structures with high sulfur ***,this review presents a detailed description of the current developments in terms of Li–S batteries in DIW of metal-based electrocatalysts.A thorough exploration of the behavior chemistry of electrocatalysis is provided,and the adhibition of metal-based catalysts used for Li–S batteries is summarized from the aspect of material usage and performance ***,the working principle of DIW technology and the requirements of used inks are presented,with a detailed focus on the latest advancements in DIW of metal-based catalysts in Li–S battery *** challenges and prospects are discussed to guide their future development.

关键词： direct ink writing efficient polysulfides conversion Li-S batteries metal-based electrocatalysts

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direct ink writing of programmable functional silicone-based composites for 4D printing applications

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Interdisciplinary Materials 2022年第4期1卷 507-516页

作者： Zhiyang Lyu J.ustin Koh Gwendolyn J.H.Lim Danwei Zhang Ting Xiong Lei Zhang Siqi Liu Junfei Duan Jun Ding John Wang Jinlan Wang Yunfei Chen Chaobin He Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments School of Mechanical EngineeringSoutheast UniversityNanjingChina Department of Materials Science and Engineering National University of SingaporeSingaporeSingapore Agency for Science Technologyand Research(A*STAR)Institute of Materials Research and EngineeringSingaporeSingapore School of Materials Science and Engineering Changsha University of Science and TechnologyChangshaChina School of Physics Southeast UniversityNanjingChina

Polydimethylsiloxane(PDMS)has been widely used in flexible electronics,soft robotics,and ***,the fabrication of PDMS-based devices has mostly relied on conventional approaches,such as casting and molding,thereby limiting their *** we fabricate PDMS-based composites with programmable microstructures by direct ink writing and realize their practical functionalities of four-dimensional(4D)*** mechanical,thermomechanical and magnetic properties of the three-dimensional-printed composites can be well tailored by using carbon,metal,or ceramic functional *** taking advantage of the printable,flexible,and magnetic PDMS composites,we demonstrate new practical functionalities of 4D printing by designing programmable architectures,including magnetic-field-driven battery cases and patchworks,as well as arbitrary morphing ceramic *** particular,4D-printed batteries are constructed by PDMS-based battery cases for the first time,which can be actuated via external magnetic *** study broadens the paradigm of 4D printing for prospective applications,such as implant batteries,biomimetic engineering,and customized biomedical devices.

关键词： 4D printing 4D-printed batteries direct ink writing PDMS polymer-derived ceramics

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A systematic printability study of direct ink writing towards high-resolution rapid manufacturing

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International Journal of Extreme Manufacturing 2023年第3期5卷 500-517页

作者： Qingyang Zheng Bin Xie Zhoulong Xu Hao Wu Flexible Electronics Research Center State Key Laboratory of Digital Manufacturing Equipment and TechnologySchool of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhanHubei 430074People’s Republic of China Guangdong Sygole Intelligent Technology Co. LtDongguanGuangdongPeople’s Republic of China

direct ink writing(DIW)holds enormous potential in fabricating multiscale and multi-functional architectures by virtue of its wide range of printable materials,simple operation,and ease of rapid *** it is well known that ink rheology and processing parameters have a direct impact on the resolution and shape of the printed objects,the underlying mechanisms of these key factors on the printability and quality of DIW technique remain poorly *** tackle this issue,we systematically analyzed the printability and quality through extrusion mechanism modeling and experimental *** non-Newtonian fluid inks were first prepared,and their rheological properties were ***,finite element analysis of the whole DIW process was conducted to reveal the flow dynamics of these *** obtained optimal process parameters(ink rheology,applied pressure,printing speed,etc)were also validated by experiments where high-resolution(70 mm s^(-1)).Finally,as a process research demonstration,we printed a series of microstructures and circuit systems with hybrid inks and silver inks,showing the suitability of the printable process *** study provides a strong quantitative illustration of the use of DIW for the high-speed preparation of high-resolution,high-precision samples.

关键词： direct ink writing extrusion mechanism modelling computational fluid dynamic(CFD) printability process parameters high-resolution printing

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Porous bio-high entropy alloy scaffolds fabricated by direct ink writing

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Journal of Materials Science & Technology 2023年第26期157卷 21-29页

作者： Guangbin Zhao Xiaoxi Shao Qingxian Zhang Yanlong Wu Yaning Wang Xu Chen Hang Tian Yaxiong Liu Yanpu Liu Bingheng Lu State Key Laboratory for Manufacturing System Engineering School of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710054China State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Clinical Research Center for Oral Diseases Department of Oral and Maxillofacial SurgerySchool of StomatologyThe Fourth Military Medical UniversityXi’an 710032China School of Mechatronic Engineering and Automation Foshan UniversityFoshan 528000China Ji Hua Laboratory Foshan 528200China College of Mechanical Engineering Xi’an University of Science and TechnologyXi’an 710054China

Porous tantalum-titanium-niobium-zirconium(Ta-Ti-Nb-Zr)bio-high entropy alloy(bioHEA)scaffolds are fabricated using direct ink writing 3D printing technology in this study.A composite ink is prepared using four metal powders as raw materials:Ta,Ti,Nb and *** extrusion is used to build 3D scaf-folds with interconnected porous structures at room temperature,which are then sintered in a vacuum *** interdiffusion of metal elements yields porous bioHEA scaffolds with a body-centered cubic(BCC)*** fabricated scaffolds have uniform compositions with a significant alloying ef-fect and good *** scaffolds have a compressive strength of 70.08-149.95 MPa and an elastic modulus of 0.18-0.64 GPa,indicating that the mechanical properties can be controlled over a wide *** scaffolds have a compressive strength close to that of human cortical bone and thus meet the requirements for porous structure characteristics and biological and mechanical properties of orthopedic implants.

关键词： direct ink writing Bio-high entropy alloy Porous scaffolds Sintering Biocompatibility Orthopedic applications

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