JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Yuyao Li,Leitao Cao,Xia Yin,Yang Si,Jianyong Yu,Bin Ding
Frequent outbreaks of emerging infectious diseases (EIDs) make personal protective filter media in high demand. Electrospun nanofibrous materials are proved to be very effective in resisting virus-containing fine particles owing to their small fiber diameters; however, hindered by the intrinsic close-packing character of fine fibers, electrospun filters suffer from a relatively high air resistance, thereby poor breathing comfort. Here, we report a biomimetic and one-step strategy to create ultrafine and curly wool-like nanofibers, named nano-wool, which exhibit fluffy assembly architecture and powerful electret effect. By achieving the online self-crimp and in-situ charging of nanofibers, the curly electret nano-wool shows a small diameter of ~0.6 μm (two orders of magnitude lower than natural wool: ~20 μm) and an ultrahigh porosity of 98.7% simultaneously, together with an ultrahigh surface potential of 13260 V (one order of magnitude higher than previous filters). The structural advantages and powerful electret effect enable nano-wool to show excellent filtration efficacy (>99.995% for PM 0.3 ) and low air resistance (55 Pa). Additionally, nano-wool can be easily scaled up, not only holding great industrial prospect in personal protective respirators, but also paving the way for developing next-generation wool in a cost-efficient and multifunctional form.
研究领域:
材料科学
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生物医学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Chengdong Xiong,Liming Wang,Jinlin Yu,Xiaohong Qin,Rongwu Wang,Jianyong Yu
Micro-nanofiber with crimped structure can be promising in advanced functional application, but its preparation method is still challenged by complex processing, uncontrollable structure and elusive formation mechanism. Herein, a novel continuous self-crimped micro-nanofiber forming method is developed by one-step electrospinning. Through morphological observation, crystal characterization, electrical-performance measurement, mathematical simulation and mechanical analysis, it is shown that the trigger of crimp of polystyrene (PS) electrospinning fiber deposited on wool substrate is the comprehensive differences in diameter size, dielectric constant and electrical conductivity between them and the gap width between substrate fibers. Additionally, the degree of crimp can be adjusted by combining position and form. The theoretical model of multiple forces is established to explain the forming mechanism of crimp, which is further validated by experimental results. Conclusively, this work offers a facile means to inspire crimping of various specific fibers, which can endow them with functional application potentials in wide field.
研究领域:
材料科学
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纺织工程
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高分子化学
✓ 已验证
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 16
·2201118
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IF 17.521
Minghang Li,Wenjie Zhu,Xin Li,Hailong Xu,Xiaomeng Fan,Hongjing Wu,Fang Ye,Jimei Xue,Xiaoqiang Li,Laifei Cheng,Litong Zhang
Heterogeneous interface design to boost interfacial polarization has become a feasible way to realize high electromagnetic wave absorbing (EMA) performance of dielectric materials. However, interfacial polarization in simple structures such as particles, rods, and flakes is weak and usually plays a secondary role. In order to enhance the interfacial polarization and simultaneously reduce the electronic conductivity to avoid reflection of electromagnetic wave, a more rational geometric structure for dielectric materials is desired. Herein, a Ti 3 C 2 T x /MoS 2 self-rolling rod-based foam is proposed to realize excellent interfacial polarization and achieve high EMA performance at ultralow density. Different surface tensions of Ti 3 C 2 T x and ammonium tetrathiomolybdate are utilized to induce the self-rolling of Ti 3 C 2 T x sheets. The rods with a high aspect ratio not only remarkably improve the polarization loss but also are beneficial to the construction of Ti 3 C 2 T x /MoS 2 foam, leading to enhanced EMA capability. As a result, the effective absorption bandwidth of Ti 3 C 2 T x /MoS 2 foam covers the whole X band (8.2–12.4 GHz) with a density of only 0.009 g cm −3 , at a thickness of 3.3 mm. The advantages of rod structures are verified through simulations in the CST microwave studio. This work inspires the rational geometric design of micro/nanostructures for new-generation EMA materials.
研究领域:
材料科学
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电磁吸收
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纳米材料
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介电性能
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Likai Hou,Zhongjun Liang,Xu Fan,Jian Yu,Fubing Bao
Many soft coiled actuators are mimic the desirable structures of plant tendril. Here, we present a facile microfluidic spinning method to fabricate self-coiling Janus microfiber actuator with tunable morphology, spontaneous coiling performance and reversible traction property. By adjusting the component of hydrogel Janus fiber in a microfluidic spinning device with theta-shaped channels, tens of hundreds of homogeneous coils can be spontaneously and rapidly generated due to asymmetric contraction upon dehydration process, and three different forms of coiled fibers with various screw diameters are presented. Furthermore, the coiled Janus microfiber with hygroscopic properties possesses a reversible coiling/uncoiling performance under humidity gradients, which can serve as a micro-actuator to lift a certain weight with enough tensile strain and long-range tractive displacement. In addition, local reversible coiling/uncoiling morphing is achieved under water contact and near infrared light optothermal stimulations. As a verification of this coiled microfiber actuator, a smart switch is designed to control different colored LED lights for sensing an ambient moisture content.
研究领域:
生物医学工程
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软体机器人
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功能高分子材料
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微纳制造
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生物传感器
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刺激响应材料
✓ 已验证
DOI
高影响因子
NATURE MATERIALS
·
2025
·Vol. 24
·期 11
·1716-1725
·
IF 38.5
Zhang Zhi,Zhang Yuwei,Lu Kangjun,Zhang Jun-Jie,Zhang Nannan,Feng Rui,Ye Haoran,Zhou Xiaoli,Li Linglong,Wan Dongyang,Lu Junpeng,Ni Zhenhua,Wang Jinlan,Chen Qian,Lu Jiong,Li Zejun
Rolling two-dimensional materials into one-dimensional nanoscrolls introduces curvature, chirality and symmetry breaking, enabling emergent properties. Conventional methods relying on external driving forces, however, exhibit poor control, low yield and limited reproducibility. Here we report spontaneous scrolling in polar van der Waals materials via an electrochemical intercalation/exfoliation process, enabling scalable nanoscroll production. This self-rolling is driven intrinsically by out-of-plane electric polarization ( P ⊥ ), where the magnitude of P ⊥ is modulated by the intercalant size. Validated across eight polar materials, this approach achieves virtually 100% yield and reproducibility with defined scrolling direction, surpassing external driving force limitations. The nanoscrolls exhibit layer-independent inversion symmetry breaking and coherently enhanced second-harmonic generation, exceeding two-dimensional flakes by ~100-fold and rivalling leading two-dimensional nonlinear materials. Electrochemical initiation further facilitates metal-ion co-intercalation, yielding ten hybrid nanoscroll architectures. These findings establish a scalable route to create one-dimensional nanostructures and hybrid heterostructures, paving the way for designer quantum solids and van der Waals superlattices in quantum nanodevices.
研究领域:
材料科学
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纳米技术
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凝聚态物理
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非线性光学
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量子材料
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Hongye Qin,Bendong Liu,Runqiu Wu,Lezhi Ye,Jiahui Yang
Micromotors demonstrate significant potential in environmental sensing, targeted biomedical therapeutics, and microscale engineering applications due to their miniaturized architecture and ability to harness environmental energy for autonomous propulsion. Nevertheless, current magnesium (Mg)-based micromotors predominantly utilize Mg microspheres as their structural foundation, restricting geometric diversity and limiting performance improvements. This paper presents a self-propelled Mg-based micromotor fabricated via the self-rolling of titanium (Ti)/magnesium (Mg) bilayer nanomembranes. Through synergistic integration of nanomembrane patterning, bilayer stress engineering, and directional sacrificial layer release, we achieved programmable assembly of three-dimensional (3D) single-tube and V-shaped double-tube architectures. The V-shaped double-tube micromotor features a hollow, asymmetric architecture with expanded Mg-acetic acid (CH₃COOH) interfacial contact area. This configuration enables directional ejection of the generated hydrogen bubbles, thereby enhancing propulsion force and increasing speed. The double-tube micromotor achieved a propulsion speed of approximately 203 μm/s in a solution of 1.2 % CH 3 COOH, significantly outperforming the 52 μm/s speed of single-tube and surpassing the speed of Janus Mg microspheres in strong acid. The Mg-based micromotor proposed in this study features structural versatility and preferable motion performance. Combined with the known biocompatibility of Ti/Mg and the therapeutic potential of hydrogen, this work may hold potential for future applications in targeted drug delivery and hydrogen-mediated synergistic therapy.
研究领域:
微纳机器人
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生物医学工程
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环境传感
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靶向药物递送
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氢气治疗
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Zhiyu Zheng,Ruxin Xiao,Xiaochen Ma,Ziqian Yu,Jiaxin Zeng,Liqiong Liao
Three-dimensional (3D) cell culture technology can mimic the physiological characteristics of tissues and organs, making it highly suitable for cell therapy, organ chips, and tissue engineering applications. However, achieving a uniform cell distribution within the 3D matrix while mitigating the effects of reactive oxygen species (ROS) accumulation generated during the 3D cell culture remains a critical challenge. Hydrogel actuators, with their excellent bioactivity and controllable self-rolling behavior, provide an optimal microenvironment for the 3D cell culture. To support normal cellular function, hydrogel actuators must be triggered by external stimuli that are biocompatible with the cell culture process. Glucose, a key intermediate in energy metabolism and biological processes, is ubiquitous in cell culture media and physiological systems. In this work, a glucose-responsive hydrogel actuator (AP@Que/gelatin) with controllable self-rolling behaviors and ROS scavenging capability was constructed for 3D cell culture, which consists of an active layer composed of phenylboronic acid (PBA)–quercetin (Que) complexes and a passive layer of a biocompatible gelatin hydrogel. The hydrogel actuator exhibited excellent glucose response performance, characterized by notable reswelling behavior, favorable ductility, and cytocompatibility. Its self-rolling behavior in high-glucose culture media was synchronized with cell adhesion timelines, enabling its application as a 2D-to-3D dynamic substrate for cell culture and expansion. Meanwhile, Que was released from the hydrogel actuator through the competitive reaction of PBA with glucose and Que. The formation of the 3D tubular architecture during cell culture facilitated cell growth, while the sustained release of Que effectively eliminated ROS generated during cell passaging. These findings highlight the potential of AP@Que/gelatin hydrogel actuators as an advanced platform for a 3D cell culture.
研究领域:
生物材料
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组织工程
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细胞培养技术
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药物递送系统
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生物执行器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）