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Chinese Journal of Chemical Engineering 2024年第3期67卷 106-116页

作者： Yifang Mi Wenqiang Wang Sen Zhang Yalong Guo Yufeng Zhao Guojin Sun Zhihai Cao Key Laboratory of advanced Textile Materials and manufacturing technology and Engineering Research center for Eco-dyeing&finishing of Textiles Ministry of EducationZhejiang Provincial Engineering Research Center for Green and Low-carbon Dyeing&FinishingZhejiang Sci-Tech UniversityHangzhou 310018China Key Laboratory for technology in Rural Water Management of Zhejiang Province Zhejiang University of Water Resources and Electric PowerHangzhou 310018China

Cyanobacteria-based activated carbon(CBAC)was successfully prepared by pyrolysis-activation of Taihu cyanobacteria.When the impregnation ratio and activated temperature were 2 and 800-C,respectively,the optimal CBACs possessed an ultra-high specific surface(2178.90 m^(2)·g^(-1))and plenty of micro-and meso-pores,as well as a high pore volume(1.01 cm^(3)·g^(-1)).Ascribed to ultra-high surface area,π-π interaction,electrostatic interaction,as well as hydrogen-bonding interactions,the CBACs displayed huge superiority in efficient dye removal.The saturated methylene blue adsorption capacity by CBACs could be as high as 1143.4 mg·g^(-1),superior to that of other reported biomass-activated carbons.The adsorption was endothermic and modeled well by the pseudo-second-order kinetic,intra-particle diffusion,and Langmuir models.This work presented the effectiveness of Taihu cyanobacteria adsorbent ascribed to its super large specific surface area and high adsorption ability.

关键词： Activated carbon Biomass Dye adsorption Taihu cyanobacteria

Biomimetic leaf structures for ultra-thin electromagnetic wave absorption

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Nano Research 2024年第5期17卷 4507-4516页

作者： Shikun Hou Ying Wang Feng Gao Fei Jin Benfeng Zhu Qiong Wu Hongliang Ge Zhihai Cao Hua Yang Magnetism Key Laboratory of Zhejiang Province&College of Optical and Electronic technology China Jiliang UniversityHangzhou 310018China Department of Materials Science and Engineering Guangdong Technion-Israel Institute of TechnologyShantou 515063China Key Laboratory of advanced Textile Materials and manufacturing technology and Engineering Research center for Eco-dyeing&finishing of Textiles Ministry of EducationZhejiang Sci-Tech UniversityHangzhou 310018China

Ultra-thin electromagnetic wave(EMW)absorbers present challenging demands on EMW absorption performance.Drawing inspiration from heather leaf structures,this study introduces an innovative design strategy for EMW absorbing material,proposing biomimetic leaf SnO_(2) structures(bio-SnO_(2))on carbon fabric(CF).By employing leaf-shaped SnS2 as precursors,biomimetic leaf SnO_(2) nanostructures are constructed on CF surface after a simple thermal treatment,resulting in bio-SnO_(2)@CF composite.Experimental results indicate that bio-SnO_(2)@CF exhibits an exceptional minimum reflection loss of-54.8 dB at an incredibly thin thickness of 1.2 mm.Radar cross section(RCS)simulations further validate the outstanding EMW attenuation ability of bio-SnO_(2)@CF,attaining a maximum RCS reduction value of 16.9 dBm^(2) at an incident wave angle ofθ=0°.This novel research showcases the biomimetic structural design strategy and its remarkable function in enhancing the EMW absorbing performance at ultra-thin absorber thickness.

关键词： biomimetic leaf structures electromagnetic wave absorption ultra-thin thickness

Study on preparation,characterization and application of mixed-colorants thermochromic microcapsules

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Particuology 2024年第5期88卷 89-97页

作者： Lan Zhou Jingpeng Ye Qinze Cai Guojin Liu Mehran Dadgar Guocheng Zhu Guoqing Zhang College of Textile Science and Engineering (International Institute of Silk) Zhejiang Sci-Tech UniversityHangzhou310018China School of Materials Science& Engineering Zhejiang Sci-Tech UniversityHangzhou310018China Department of Textile University of NeyshaburAdib BoulevardKhorasan Razavi ProvinceIran Zhejiang Charming dyeing and finishing Co. LtdJiaxing314500China Zhejiang Provincial innovation center of advanced Textile technology Shaoxing312000China

In order to expand the color-change range and make the discoloration temperature suitable for the daily textiles,a new formulation of mixed-colorants thermochromic core material is designed,in which crystal violet lactone(CVL)is the basic color former,bisphenol A(BPA)is the developer,especially the solvent-based dye and dodecyl dedecanoate are used as the extended dye and the solvent,respectively.Scanning electron microscope(SEM),differential scanning calorimeter(DSC)and thermogravimetric analyzer(TGA)were applied to study the morphology,encapsulation rate,non-isothermal crystallization behavior and thermal stability of the mixed-colorant thermochromic microcapsules(MCTMs)prepared by in-situ polymerization.The results show that MCTMs have good sphericity,uniform particle size,good thermal stability and the encapsulation rate can reach 86.73%.Under the non-isothermal conditions,the encapsulation of formaldehyde-melamine resin wall material can slightly reduce the crystallization rate of the solvent,but does not affect the relative crystallinity,thermal properties and discoloration sensitivity of the core materials.With the variety of ambient temperatures in the range of 20–35°C,the printed cotton fabrics with MCTMs could change color reversibly between different tones with good reliability and durability,and exhibit more gorgeous colors than the common thermochromic materials.

关键词： Thermochromic microcapsule Color-change range Phase-change material Crystallization behavior

A novel breathable flexible metallized fabric for wearable heating device with flame-retardant and antibacterial properties

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Journal of Materials Science & technology 2022年第27期122卷 200-210页

作者： Peibo Du Jinping Zhang Zhiguang Guo Helan Wang Zhenmeng Luo Zhiying Fan Bo Li Zaisheng Cai Fengyan Ge College of Chemistry Chemical Engineering and BiotechnologyDonghua University Institute of functional materials Donghua University technology innovation center of Hebei for fiber material Shijiazhuang University national innovation center of advanced dyeing and finishing technology

Currently,there is an imperative demand for developing a novel flexible heater with high adhesion,breathability,and extreme condition resistance,such as ultra-high temperatures and even fire.Herein,a high-adhesion,flame-retardancy,and anti-bacteria copper nanoparticles networks/nylon 6 woven fabric(CNNs/NWF)wearable heater with a“sandwich-like”structure has been designed and fabricated based on phatic acid/aminopropyltriethoxysilane(PA/APTES)hybrid coating.On the one hand,the CNNs/NWF wearable heater exhibited superb electrothermal behavior working at a peak temperature of 208.8℃powered with 2.0 V,better than that of wearable heaters in the recently reported literature.On the other hand,the vertical burning test showed that the heater possesses splendid flame retardancy.Furthermore,the PA/APTES coating could deposit a nanoscale porous protective film on the surface of CNNs/NWF,which imparts the heater with relatively excellent oxidation resistance and breathability.In addition,the antibacterial efficiency against Escherichia coli(E.coli)and Staphylococcus aureus(S.aureus)still reached100%after 50 times of standard washing and being electrified at 2.0 V for 5 min,keeping humans away from the threat of bacterial infections.We think that the heater in this research could be extended to wearable heating devices.

关键词： PA/APTES coating Electrothermal behavior Breathability Flame retardancy Anti-bacteria

Cutting edge preparation of microdrills by shear thickening polishing for improved hole quality in electronic PCBs

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Frontiers of Mechanical Engineering 2024年第2期19卷 99-107页

作者： Jiahuan WANG Mingfeng KE Jiepei LIAO Yu ZHOU Saurav GOEL Jaya VERMA Xu WANG Weigang GUO Julong YUAN Binghai LYU College of Mechanical Engineering Zhejiang University of TechnologyHangzhou 310000China Ultra-precision Machining center Key Laboratory of Special Purpose Equipment and Advanced Manufacturing TechnologyZhejiang University of TechnologyHangzhou 310000China School of Engineering London South Bank UniversityLondon SE10AAUK Shenzhen Jinzhou Precision technology Corporation Shenzhen 518116China Department of Mechanical Engineering University of Petroleum and Energy StudiesDehradun 248007India Special Equipment Institute Hangzhou Vocational&Technical CollegeHangzhou 310018China

Printed circuit boards(PCBs)are representative composite materials,and their high-quality drilling machining remains a persistent challenge in the industry.The finishing of the cutting edge of a microdrill is crucial to drill performance in machining fine-quality holes with a prolonged tool life.The miniature size involving submicron scale geometric dimensions,a complex flute shape,and low fracture toughness makes the cutting edge of microdrills susceptible to breakage and has been the primary limiting factor in edge preparation for microdrills.In this study,a newly developed cutting edge preparation method for microdrills was tested experimentally on electronic printed circuit boards.The proposed method,namely,shear thickening polishing,limited the cutting edge burrs and chipping on the cutting edge,and this in turn transformed the cutting edge’s radius from being sharp to smooth.Moreover,the edge–edge radius could be regulated by adjusting the processing time.PCB drilling experiments were conducted to investigate the influence of different cutting edge radii on wear,hole position accuracy,nail head value,and hole wall roughness.The proposed approach showed 20%enhancement in hole position accuracy,33%reduction in the nail head value,and 19%reduction in hole wall roughness compared with the original microdrill.However,a threshold is needed;without it,excessive shear thickening polishing will result in a blunt edge,which may accelerate the wear of the microdrill.Wear was identified as the primary factor that reduced hole quality.The study indicates that in printed circuit board machining,microdrills should effectively eliminate grinding defects and maintain the sharpness of the cutting edge as much as possible to obtain excellent drilling quality.Overall,shear thickening polishing is a promising method for cutting edge preparation of microdrills.Further research and optimization can lead to additional improvements in microdrill performance and contribute to the continued advancement of printed circuit board manufa

关键词： microdrill shear thickening polishing cutting edge preparation electronic printed circuit boards hole quality

Green Plant Leaf-inspired Smart Camouflage Fabrics for Visible Light and Near-infrared Stealth

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Journal of Bionic Engineering 2022年第3期19卷 788-798页

作者： Qixin Lu Min Li Anli Tian Shaohai Fu Jiangsu Engineering Research Centre for Digital Textile Inkjet Printing Key Laboratory of Eco-TextileMinistry of EducationJiangnan UniversityWuxi214122China national manufacturing innovation Centre of advanced dyeing and finishing technology Ministry of EducationJiangnan UniversityWuxi214122China

Due to Visible light and Near-Infrared(Vis–NIR)stealth play an important role in the commercial,military,and scientific fields,camouflage materials related to it attracted increasing attention in decades.Green plant leaves,as the most extensive background materials on the earth,were widely simulated in the camouflage materials.However,difficult full-spectrum simulation(380–2500 nm),low-similarity simulation and the complex preparation have been great challenges for Vis–NIR Camouflage Materials(Vis–NIR-CMs).Herein,basing on the color-matching principle,two novel Vis–NIR-CMs including Dark Green Materials and Light Green Materials(DGM and LGM)were facilely fabricated by simple printing organic disperse dyes including C.I.Disperse Blue 291,C.I.Disperse Yellow 114,and C.I.Disperse Orange 30(B-291,Y-114 and O-30),and titanium dioxide(TiO_(2))on the viscose fabrics.Based on the excellent red edge property of B-291 and high scattering ability of TiO2,DGM and LGM exhibited generally high spectral correlation coefficients r_(m)(>0.95)with green plant leaves.Moreover,with the great color performance,excellent objects covering performance,low areal density(7.7 MPa),high softness(>81.27),high air permeability(>45.848 mm s^(−1)),DGM and LGM showed good simulation performance and wearing comfort to satisfy the application needs.This work presents a high-similarity Vis–NIR-CMs as a reference for full-spectrum camouflage materials,as well as low-cost and efficient preparation method is beneficial to the development of camouflage field.

关键词： Vis-NIR Camouflage materials Plant leaves Organic dyes Viscose fabrics

高灵敏度,超宽响应范围,环境耐受性高的多模式离子凝胶基传感器

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Science China Materials 2023年第5期66卷 1899-1910页

作者：铁建飞毛志平张琳萍钟毅隋晓锋徐红 Key Lab of Science and technology of Eco-textile Ministry of EducationCollege of ChemistryChemical Engineering and BiotechnologyInnovation Center for Textile Science and TechnologyDonghua UniversityShanghai 201620China national manufacturing innovation center of advanced dyeing and finishing technology Taian 271000China

近年来,离子类皮肤传感器因其高性能和良好的兼容性等优点而备受关注.然而,开发一种多功能、稳定、高灵敏度和耐用的离子类皮肤传感器仍面临挑战.本文通过简单的紫外引发聚合制备了具有良好耐用性、环境(抗冻、耐真空)稳定性、离子导电... 详细信息

近年来,离子类皮肤传感器因其高性能和良好的兼容性等优点而备受关注.然而,开发一种多功能、稳定、高灵敏度和耐用的离子类皮肤传感器仍面临挑战.本文通过简单的紫外引发聚合制备了具有良好耐用性、环境(抗冻、耐真空)稳定性、离子导电性、自愈性、高粘附性和拉伸性的复合离子凝胶.该离子凝胶可以组装为应变、压力和温度传感器,用于检测外部环境的变化.无论是作为应变传感器还是压力传感器,离子凝胶基传感器都具有高灵敏度(GF=14.7)、宽响应范围(1%-1600%)、快速响应时同(95.8 ms)、优异的稳定性和可重复性(1000次).因此,它不仅可以追踪关节运动,还可以监测细微的表情变化(皱眉).该离子凝胶还可以组装成敲击传感器和高精度书写板传感器,用于信息传递.此外,该传感器对温度变化具有较高的灵敏度,温度感知范围在0-120℃之间,且检测阈值较低(0.1℃).因此,基于离子凝胶的传感器有望应用于多功能电子和传感设备.

关键词： stretchability environmental tolerance high sensitivity wide range strain/temperature sensor

Robot Positioning Based on Multiple Quick Response Code Landmarks

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Journal of Donghua University(English Edition) 2023年第6期40卷 667-675页

作者：李锋余彦君盛守祥 College of Computer Science and technology Donghua UniversityShanghai 201620China national innovation center of advanced dyeing&finishing technology Tai′an 271000China Huafang Co. Ltd.Binzhou 256600China

The scheme of robot positioning based on multiple quick response(QR)code landmarks is proposed.Firstly,the pose of the robot relative to the QR code landmarks is obtained by extracting the feature points of the QR code,combined with the visual computing technology.Then,the conversion of the absolute pose of the robot is completed based on the absolute position of the QR code landmark,and thus the real-time position of the robot is obtained.The proposed scheme makes full use of the QR code fault tolerance and multiple QR code landmarks to improve the calculation accuracy.It has good robustness and versatility,and it is easy to implement.It can help the robot to complete the positioning in the actual work,making robot navigation more accurate.

关键词： computer vision quick response(QR)code robot positioning robot orientation

Preparation and Characterization of Sepiolite Microfibers with High Aspect Ratio

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Journal of Donghua University(English Edition) 2022年第6期39卷 542-548页

作者：续通胡叶蕾钱迪朱元昭钟毅张琳萍徐红毛志平 Key Laboratory of Science&technology of Eco-Textile Ministry of EducationDonghua UniversityShanghai 201620China national dyeing and finishing Engineering technology Research center Donghua UniversityShanghai 201620China national manufacturing innovation center of advanced dyeing and finishing technology Taian 271000China Key Laboratory of Bioorganic Phosphorus Chemistry&Chemical Biology Ministry of EducationDepartment of ChemistryTsinghua UniversityBeijing 100084China Sino-German Engineering College Shanghai Technical Institute of Electronics&InformationShanghai 201411China

It is difficult to access exfoliated sepiolite(Sep)fibers with high aspect ratio from Sep ore.The traditional method used to purify Sep ore also reduces its aspect ratio.In this study,impurities in the Sep ore were removed by acid activation followed by a cetyltrimethylammonium chloride(C16)treatment to organically modify the purified Sep by cation exchange.Then,the organically-modified Sep(O-Sep)was stripped and processed by an ultrasonic cell crusher to obtain Sep microfibers at a specific frequency for a given period.These Sep samples had relatively high aspect ratio,compared with the Sep fibers gotten by traditional method.Scanning electron microscopy(SEM)and transmission electron microscopy(TEM)demonstrate the micro-morphology of exfoliated Sep samples in an intuitive way.Moreover,pure inorganic membrane prepared only with the exfoliated Sep fibers exhibited excellent flexibility,further demonstrating the excellent properties of Sep fibers with high aspect ratio.

关键词： sepiolite microfiber high aspect ratio inorganic membrane flexibility

Temperature‑Arousing Self‑Powered Fire Warning E‑Textile Based on p-n Segment Coaxial Aerogel Fibers for Active Fire Protection in Firefighting Clothing

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Nano-Micro Letters 2023年第12期15卷 141-160页

作者： Hualing He Yi Qin Zhenyu Zhu Qing Jiang Shengnan Ouyang Yuhang Wan Xueru Qu Jie Xu Zhicai Yu State Key Laboratory of New Textile Materials and advanced Processing Technologies School of Textile Science and EngineeringWuhan Textile UniversityWuhan 430200People’s Republic of China national Local Joint Laboratory for advanced Textile Processing and Clean Production Hubei Key Laboratory of Biomass Fibers and Eco‑Dyeing and FinishingWuhan Textile UniversityWuhan 430200People’s Republic of China Jiangsu New Horizon advanced Functional Fiber innovation center Co. Ltd.Suzhou 215000People’s Republic of China

Firefighting protective clothing is a crucial protective equipment for firefighters to minimize skin burn and ensure safety firefighting operation and rescue mission.A recent increasing concern is to develop self-powered fire warning materials that can be incorporated into the firefighting clothing to achieve active fire protection for firefighters before the protective clothing catches fire on fireground.However,it is still a challenge to facilely design and manufacture thermoelectric(TE)textile(TET)-based fire warning electronics with dynamic surface conformability and breathability.Here,we develop an alternate coaxial wet-spinning strategy to continuously produce alternating p/n-type TE aerogel fibers involving n-type Ti_(3)C_(2)T_(x)MXene and p-type MXene/SWCNT-COOH as core materials,and tough aramid nanofiber as protective shell,which simultaneously ensure the flexibility and high-efficiency TE power generation.With such alternating p/n-type TE fibers,TET-based self-powered fire warning sensors with high mechanical stability and wearability are successfully fabricated through stitching the alternating p-n segment TE fibers into aramid fabric.The results indicate that TET-based fire warning electronics containing 50 p-n pairs produce the open-circuit voltage of 7.5 mV with a power density of 119.79 nW cm-2 at a temperature difference of 300℃.The output voltage signal is then calculated as corresponding surface temperature of firefighting clothing based on a linear relationship between TE voltage and temperature.The fire alarm response time and flame-retardant properties are further displayed.Such self-powered fire warning electronics are true textiles that offer breathability and compatibility with body movement,demonstrating their potential application in firefighting clothing.

关键词： Self-powered fire warning Coaxial wet spinning P-n segment thermoelectric fiber Thermoelectric textiles Active fire protection