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Rheological properties and screen printability of UV curable conductive ink for flexible and washable E-textiles

Journal of Materials Science & Technology 2021年第8期67卷 145-155页

作者： Hong Hong Jiyong Hu Kyoung-Sik Moon Xiong Yan Ching-ping Wong Key Laboratory of Textile Science STechnology Ministry of EducationDong hua UniversityShanghai 201620China Key Laboratory of High Performance Fibers&Products Ministry of EducationDonghua UniversityShanghai 201620China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGeorgia 30332United States

As a critical component for the realization of flexible electronics,multifunctional electronic textiles(etextiles)still struggle to achieve controllable printing accuracy,excellent flexibility,decent washability and simple *** printing process of conductive ink plays an important role in manufacturing e-textiles and meanwhile is also the main source of printing *** this work,we report the preparation of fully flexible and washable textile-based conductive circuits with screen-printing method based on novel-developed UV-curing conductive ink that contains low temperature and fast cure *** work systematically investigated the correlation between ink formulation,rheological properties,screen printability on fabric substrates,and the electrical properties of the e-textile made *** rheological behaviors,including the thixotropic behavior and oscillatory stress sweep of the conductive inks was found depending heavily on the polymer to diluent ratio in the ***,the rheological response of the inks during screen printing showed determining influence to their printability on textile,that the proper control of ink base viscosity,recovery time and storage/loss modulus is key to ensure the uniformity of printed conductive lines and therefore the electrical conductivity of fabricated e-textiles.A formulation with 24 wt%polymer and 10.8 wt%diluent meets all these stringent *** conductive lines with 1.0 mm width showed exceptionally low resistivity of 2.06×10^(-5)Ωcm Moreover,the conductive lines presented excellent bending tolerance,and there was no significant change in the sample electrical resistance during 10 cycles of washing and drying *** is believed that these novel findings and the promising results of the prepared product will provide the basic guideline to the ink formulation design and applications for screen-printing electronics textiles.

关键词： conductive ink Rheology Screen printing UV curing Washable E-textiles

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Synthesis of Cu Nano-particle in Toluene Used for conductive ink with a Binder of Polyurethane

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Journal of Wuhan University of Technology(Materials Science) 2013年第6期28卷 1246-1250页

作者： LI Song LIU Peng WANG Qisui CHEN Xia XIAO Jing Department of Logistics Automation School of Logistics EngineeringWuhan University of Technology Department of Chemistry School of SciencesWuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Copper nanoparticles with a size of about 150 nm were prepared in toluene using oleic acid as protecting agent. The nanoparticles were used to prepare conductive Cu ink with a polyurethane binder. Oleic acid was used to prevent the nanoparticles from oxidization and agglomeration. The prepared Cu nanoparticles were characterized by X-ray diffraction （XRD） and transmission electron microscopy （TEM）. The resistivity of the copper film on glass substrate that was prepared using Cu nanoparticle ink reached about 1.5× 10-4 2. cm-1 after it was annealed to 120 ~C. Both the nanoparticle ink and the films were characterized by XRD, fourier transform infrared （FT-IR）, and the thermogravimetry-differential scanning calorimetry instrument （TG- DSC）.

关键词： copper nanoparticles oleic acid toluene conductive ink copper film

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Preparation of Cu@Ag Nanoparticles for conductive ink

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Journal of Materials Science and Chemical Engineering 2021年第9期9卷 1-10页

作者： Sijie Wang Helong Yu National Engineering Research Center for Mechanical Product Remanufacturing Army Academy of Armored Forces Beijing China

In order to overcome the shortcomings of low-cost anti-oxidation conductive ink and its preparation method in the field of printing electronics, core-shell coated Cu@Ag nanoparticles were used to prepare conductive ink, and a printed circuit was obtained by inkjet printing. Copper nanoparticles were prepared by a chemical reduction method and then coated with Cu@Ag particles by a copper-based self-catalytic reaction. conductive ink was prepared by ball milling and dispersion and printed on PI film to form a conductive coating. After characterization and analysis, the particle size and dispersion of the obtained Cu@Ag meet the requirements and can be stored stably under normal atmospheric conditions. The resistivity of the conductive film sintered at 300˚C is only 10.6 μΩ∙cm.

关键词： Printed Electronics conductive ink Core-Shell Nanoparticles Antioxidant

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CuCl_(2)-doped graphene-based screen printing conductive inks

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Science China Materials 2022年第7期65卷 1890-1901页

作者： Lixin Liu Xiaojing Zhang Han Ma Zhigang Shen School of Materials Science and Engineering Beihang UniversityBeijing 100191China Beijing Key Lab.for Powder Technology Research and Development Beihang UniversityBeijing 100191China School of Aeronautic Science and Engineering Beihang UniversityBeijing 100191China School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094China

The preparation of graphene-based conductive inks and their application in the field of flexible electronics have been extensively ***,improving the conductivity of the printed patterns always induces the neglect of the rheological properties of the graphene-based conductive inks or the mechanical properties of the as-printed *** this study,the p-type doping of graphene with CuCl_(2)as the dopant is realized through liquid phase reaction,and the doped graphene powders are used to prepare the graphenebased conductive inks with a conductivity of 3.13×10^(4)S m^(-1).Subsequently,to simplify the preparation of inks,CuCl_(2)is directly added into the graphene-based conductive inks,achieving the p-type doped graphene ink with the conductivity of 3.64×10^(4)S m^(-1).The read range of ultrahigh-frequency radio frequency identification antenna and the temperature of the flexible electrothermal film printed with the CuCl_(2)-doped graphene-based conductive inks can reach 7.15 m and 200℃,respectively when the equivalent isotropically radiated power is equal to 4 W and the input power density is 0.94 W cm^(-2).Moreover,good rheological properties of the conductive inks and high mechanical properties of the printed patterns are also obtained.

关键词： graphene CuCl_(2) doping conductive ink UHF RFID antenna flexible electrothermal film

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Recent progress in printing flexible electronics: A review

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Science China(Technological Sciences) 2024年第8期67卷 2363-2386页

作者： BI Sheng GAO BuHan HAN Xu HE ZhengRan METTS Jacob JIANG ChengMing ASARE-YEBOAH Kyeiwaa Key Laboratory for Precision and Non-traditional Machining Technology of the Ministry of Education School of Mechanical EngineeringDalian University of TechnologyDalian 116024China Center for Materials for Information Technology The University of AlabamaTuscaloosaAL 35487USA Department of Electrical and Computer Engineering Penn State BehrendEriePA 16563USA

Miniaturization and flexibility are becoming the trend in the development of electronic products. These key features are driving new methods in the manufacturing of such products. Printed electronics technology is a novel additive manufacturing technique that uses active inks to print onto a diverse set of substrates, realizing large-area, low-cost, flexible and green manufacturing of electronic products. These advantageous properties make it extremely compatible with flexible electronics fabrication and extend as far as offering revolutionary methods in the production of flexible electronic devices. In this paper, the details of a printing process system are introduced, including the materials that can be employed as inks, common substrates, and the most recently reported printing strategies. An assessment of future setbacks and developments of printed flexible electronics is also presented.

关键词： flexible electronics printing process conductive ink flexible substrate

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Naturally Crosslinked Biocompatible Carbonaceous Liquid Metal Aqueous ink Printing Wearable Electronics for Multi-Sensing and Energy Harvesting

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Nano-Micro Letters 2024年第8期16卷 148-168页

作者： King Yan Chung Bingang Xu Di Tan Qingjun Yang Zihua Li Hong Fu Nanotechnology Center School of Fashion and TextilesThe Hong Kong Polytechnic UniversityHong Kong 999077People’s Republic of China Department of Mathematics and Information Technology The Education University of Hong KongHong KongPeople’s Republic of China

Achieving flexible electronics with comfort and durability comparable to traditional textiles is one of the ultimate pursuits of smart *** printing is desirable for e-textile development using a simple and inexpensive ***,fabricating high-performance atop textiles with good dispersity,stability,biocompatibility,and wearability for high-resolution,large-scale manufacturing,and practical applications has remained ***,waterbased multi-walled carbon nanotubes(MWCNTs)-decorated liquid metal(LM)inks are proposed with carbonaceous gallium–indium *** the assistance of biopolymers,the sodium alginate-encapsulated LM droplets contain high carboxyl groups which non-covalently crosslink with silk sericin-mediated MWCNTs.E-textile can be prepared subsequently via printing technique and natural waterproof triboelectric coating,enabling good flexibility,hydrophilicity,breathability,wearability,biocompatibility,conductivity,stability,and excellent versatility,without any artificial *** obtained e-textile can be used in various applications with designable patterns and ***-sensing applications of recognizing complex human motions,breathing,phonation,and pressure distribution are demonstrated with repeatable and reliable ***-powered and energy-harvesting capabilities are also presented by driving electronic devices and lighting *** proof of concept,this work provides new opportunities in a scalable and sustainable way to develop novel wearable electronics and smart clothing for future commercial applications.

关键词： Biocompatible conductive ink Biopolymer E-textile Carbonaceous liquid metal

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Preparation of low-temperature sintered high conductivity inks based on nanosilver self-assembled on surface of graphene

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Journal of Central South University 2019年第11期26卷 2953-2960页

作者： LIU Piao HE Wen-qiang LU An-xian Hunan LEED Electronic ink Co. Ltd.Zhuzhou 412007China School of Materials Science and Engineering Central South UniversityChangsha 410083China

Finer nanoplates of silver are prepared by self-assembly on the surface of graphene,and the low-temperature sintered high conductivity ink containing the silver nanoplates is *** importantly,graphene is added to the solution before the chemical reduction reaction ***,it is found that silver nanoplates have self-assembly phenomenon on the surface of ***,the Ag nano hexagonal platelets(AgNHPs)with small particle sizes(10 nm),narrow distribution and good dispersion are ***,smaller sizes(10 nm)and narrower particle size distribution of AgNHPs particles can be easily controlled by using this ***,the conductivity of the ink is *** example,when the printed patterns were sintering at 150℃,the resistivity of the ink(GE:0.15 g/L)reached the minimum value of 2.2×10^-6 *** the resistivity value was 3.7×10^-6Ωcm,when it was sintered at 100℃ for 30 *** conductive ink prepared can be used for the field of printing electronics as ink-jet printing ink.

关键词： Ag nanoparticles graphene self-assembly conductive ink electrical properties

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