JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Weiwei He,Puye Zhang,Zhonglue Hu,Shuai Yang,Wei Chen,Tianlong He,Lei Tang,Jiajia Zheng,Runsheng Li,Boce Xue,Guoqing Hu,Yanzhen Zhang
Amid the global wave of intelligentization, flexible pressure sensors have emerged as core sensing components owing to their excellent flexibility, portability, and highly sensitive response to pressure signals in fields such as human-computer interaction, health monitoring, smart wearable devices, and artificial-intelligence terminals. Herein, we developed a flexible pressure sensor with a hierarchically porous structure via a hybrid manufacturing strategy integrating three-dimensional (3D) printing and electrospinning. A MXene/silver nanowires/polydimethylsiloxane (MAP) conductive ink modified with nano silicon dioxide (SiO 2 ) was formulated to optimize printability, and the multi-scale porous sensing unit was constructed by direct ink writing (DIW) combined with a sacrificial template method, followed by encapsulation with a fibrous film electrode. Benefiting from the synergistic effect of macro-micro porous structure and the structural-mechanical matching design, the sensor exhibits high sensitivity (0.813 kPa −1 ), fast response (37 ms/30 ms), and an extremely low detection limit (1.47 Pa), thus enabling the effective monitoring of various human physiological motion signals and demonstrating significant potential in health monitoring applications. Furthermore, by integrating deep learning algorithms, high-accuracy recognition (94.9 %) of several spoken phrases is achieved, extending the sensor's applicability to human-computer interaction and intelligent speech perception. In summary, this study proposes a strategy based on a hybrid manufacturing technology for fabricating hierarchically porous flexible pressure sensors, demonstrating broad application prospects in health monitoring and smart human-computer interaction, thus providing new pathways for the innovative design and functional expansion of wearable electronic devices.
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DOI
PubMed
高影响因子
LAB ON A CHIP
·
2024
·Vol. 24
·期 17
·4073-4084
·
IF 6.1
Shiyu Wang,Shucong Li,Wenchang Zhao,Ying Zhou,Liqiu Wang,Joanna Aizenberg,Pingan Zhu
Microactuators, capable of executing tasks typically repetitive, hazardous, or impossible for humans, hold great promise across fields such as precision medicine, environmental remediation, and swarm intelligence. However, intricate motions of microactuators normally require high complexity in design, making it increasingly challenging to realize at small scales using existing fabrication techniques. Taking inspiration from the hierarchical-anisotropy principle found in nature, we program liquid crystalline elastomer (LCE) microactuators with multimodal actuation tailored to their molecular, shape, and architectural anisotropies at (sub)nanometer, micrometer, and (sub)millimeter scales, respectively. Our strategy enables diverse deformations with individual LCE microstructures, including expanding, contracting, twisting, bending, and unwinding, as well as re-programmable shape transformations of assembled LCE architectures with negative Poisson's ratios, locally adjustable actuation, and changing from two-dimensional (2D) to three-dimensional (3D) structures. Furthermore, we design tetrahedral microactuators with well-controlled mobility and precise manipulation of both solids and liquids in various environments. This study provides a paradigm shift in the development of microactuators, unlocking a vast array of complexities achievable through manipulation at each hierarchical level of anisotropy.
研究领域:
材料科学
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机器人学
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微工程
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生物医学工程
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纳米技术
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DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-14
·
IF 16.6
Chen Feipeng,Li Xiufeng,Yu Yafeng,Li Qingchuan,Lin Haisong,Xu Lizhi,Shum Ho Cheung
Engineering heterogeneous hydrogels with distinct phases at various lengths, which resemble biological tissues with high complexity, remains challenging by existing fabricating techniques that require complicated procedures and are often only applicable at bulk scales. Here, inspired by ubiquitous phase separation phenomena in biology, we present a one-step fabrication method based on aqueous phase separation to construct two-aqueous-phase gels that comprise multiple phases with distinct physicochemical properties. The gels fabricated by this approach exhibit enhanced interfacial mechanics compared with their counterparts obtained from conventional layer-by-layer methods. Moreover, two-aqueous-phase gels with programmable structures and tunable physicochemical properties can be conveniently constructed by adjusting the polymer constituents, gelation conditions, and combining different fabrication techniques, such as 3D-printing. The versatility of our approach is demonstrated by mimicking the key features of several biological architectures at different lengths: macroscale muscle-tendon connections; mesoscale cell patterning; microscale molecular compartmentalization. The present work advances the fabrication approach for designing heterogeneous multifunctional materials for various technological and biomedical applications.
研究领域:
材料科学
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生物医学工程
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组织工程
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高分子化学
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生物材料
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DOI
PubMed
高影响因子
Journal of Manufacturing Processes
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2025
·
IF 6.8
Zhihui Zhang,Jianxin Deng,Yang Lu,Xujie Tang,Yichen Bao
This study investigates the cutting performance of textured composite coatings deposited on cutting tool surfaces via electrohydrodynamic atomization (EHDA). The resulting jagged-textured coatings exhibited high surface integrity, with well-bonded soft and hard phases with clearly defined interfacial boundaries. In dry cutting of 304 stainless steel, the C3ZT-coated tools exhibited significantly reduced cutting force, friction coefficient, and cutting temperature, alongside improved surface finish, reduced tool wear, and favorable chip formation. The micro-textured hard layers minimized the tool-chip contact zone and enhanced wear resistance, while the tailored soft phases enhanced lubrication effectiveness. These combined effects contributed to consistently improved tribological behavior across varying cutting speeds. The findings provide useful insights for the development of advanced multifunctional coated tools.
研究领域:
材料科学
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机械工程
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表面工程
·
制造技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2021
·
IF 8.067
Guo-Xiang Zhou,Zhe Zhao,Yan-zhao Zhang,Wen-jin Liu,Zhi-Hua Yang,De-Chang Jia,Yu Zhou
The study of Frequency Selective Surface (FSS) by Direct ink writing (DIW) has attracted much attention due to the convenience and effectiveness of 3D printing technology. However, the limited printing precision of DIW has heavily restricted its applications as the electromagnetic performance is highly sensitive to it, especially the precision at the microscale. Herein, the ultra-high printing precision of FSS was achieved through DIW by the uniformly dispersed graphene sheets to deeply modify the rheological behavior and the steric hindrance effect. Thus, the highly precision of the printed filament width as thin as 67 μm with a space of only 42 μm were achieved, which is difficult for conventional DIW, and no structural distortion is found after 3D printing, no matter it was 2D printed on a flat surface or the sharply skewed hook face, or even 3D printed to architectural structures. According to the highly improved precision, the electromagnetic performance matching between the designed model and the printed physical FSS device was perfectly achieved, reducing the center frequency error less than 0.3 GHz, and the transmission coefficient error less than 0.046. Our work promises an effective and easy preparation of high-quality FSS from the aid of graphene.
研究领域:
材料科学
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电磁学
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制造技术
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DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 72
·44323-44331
·
IF 3.119
Hanyu Xue,Xinzhong Li,Jianrong Xia,Qi Lin
Improving the adhesion between layers and achieving the recycling of resins are challenges in additive manufacturing (AM) technology. In this work, a new type of photo-reversible crosslinking resin based on polyvinyl alcohol (PVA) and coumarin (HMC) was prepared via grafting reaction. The critical idea was to create a coumarin based photo-reversible crosslinking resin by carefully tailoring the photo-crosslinking time and temperature, so that the resin could be extruded through the nozzle and then maintain the proper shape during UV-curing. Photo-reversible crosslinking of AM resin was realized without the use of monomers, photo-initiators or propagating. A reasonable irradiation time with 354 nm (crosslink) or 254 nm UV light (cleavage) of 10 min was critical for photo-reversible crosslinking of PVA-g-HMC at 120 °C. An important result of this work was that the developed photo-reversible crosslinked resin could be reused and the printed resin exhibits excellent adhesion properties, thermal conductivity and oxygen barrier performance.
研究领域:
材料科学
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化学工程
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制造技术
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DOI
高影响因子
CARBON
·
2020
·
IF 8.821
Yuxin Zuo,Xinran Su,Xinwei Li,Zhengjun Yao,Tingting Yu,Jintang Zhou,Jing Li,Jiong Lu,Jun Ding
Impedance matching and enhanced microwave attenuation have been proven to be effective strategies for improving reflection loss (R L ) and widening of the effective absorption (R L < −10 dB) bandwidth of absorbers. Herein, we present novel multimaterial bilayer absorbing composites consisting of graphene/Li 0.35 Zn 0.3 Fe 2.35 O 4 /polymethyl methacrylate (GFP) as the matching layer and graphene/carbonyl iron powder/polymethyl methacrylate (GIP) as the absorption layer via our multimaterial digital light processing (DLP) 3D printing method. Through numerical calculations, microwave absorption performance of the bilayer absorber is found to be greatly enhanced as compared to its constituents. In addition, the effective absorption bandwidth can be also tuned via differing ratios of the GFP/GIP layer thicknesses under a fixed total thickness. A GFP/GIP bilayer of 1.4/2.6 mm was optimized based on R L . Experimented maximum R L peaks of −46.1 and −17.9 dB were revealed at frequencies of 4.7 and 15.7 GHz, respectively, with effective absorption bandwidth up to 3.5 GHz (4.15–5.35, 14.7–17.0 GHz). The microwave absorption performance of the GFP + GIP bilayer absorber is significantly improved by proper impedance matching and multiple-type loss forms. Overall this work provides a new strategy to manufacture efficient, broadband, and adjustable microwave absorbers by 3D printing .
研究领域:
材料科学
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电磁学
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制造技术
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DOI
高影响因子
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
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2015
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IF 1.517
Jiqing Cai,Ping Zhou,Renke Kang,Kun Shan,Dongming Guo
In the electrogenerated chemical polishing (EGCP), material removal rate (MRR) is inversely proportional to the processing gap. To polish a workpiece with a large area, high and uniform MRR is necessary, which prefers a small and uniform processing gap. Based on the principle of the hydrostatic support, a novel micro-gap control method is proposed. The method uniformly controls the gap between the electrode and workpiece to a micro level over a large area. A relationship between the gap size and the inlet pressure is derived theoretically and verified experimentally. The proposed method is successfully applied to the polishing of a Cu surface with a diameter of 50 mm. Promising results are obtained that surface roughness and flatness are reduced from average roughness (Ra) 82 nm and peak-to-valley (PV) value 290 nm to Ra 4 nm and PV 120 nm, respectively.
研究领域:
精密工程
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电化学加工
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表面处理
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制造技术
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DOI
高影响因子
Journal of Manufacturing Processes
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2021
·
IF 5.01
Wulin Zhang,Changbao Liu,Yongjie Yuan,Pengfei Zhang,Xiaoqiang Fan,Minhao Zhu
Grinding behaviour and wear mechanism of self-fabricated rail grinding stones (GS) using zirconia alumina (ZA), white fused alumina (WA) and brown fused alumina (A) were investigated in detail. The results illustrated that the grinding efficiency grew from GS-ZA and GS-A to GS-WA, and the GS-ZA gave the best ground rail surface quality. GS-ZA primarily consumed as attrition wear, while abrasive pull-out and fracture were dominant for the GS-WA and GS-A, thus making a better self-sharpness. The splintering mechanism of ZA was intergranular and transgranular fracture , and the macro-fracture and micro-fracture were presented by WA and A, respectively. Based on the experimental results, some suggestions about regulating the grinding performance of different GS, such as improving the grinding load of GS-ZA, reducing grinding heat of GS-WA, and the abrasive/bond interface modification of GS-A, were finally proposed.
研究领域:
材料科学
·
机械工程
·
摩擦学
·
制造技术
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DOI
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 38
·14122-14128
·
IF 8.307
Chenchao Huang,Zishou Hu,Yuan-Qiu-Qiang Yi,Xiaolian Chen,Xinzhou Wu,Wenming Su,Zheng Cui
Manufacturing cost is a major concern for electrochromic device (ECD) applications in smart windows for energy saving and low-carbon economy. Fully printing instead of a vacuum-based chemical vapor deposition (CVD) process is favored for large-scale fabrication of ECDs. To adapt to the screen printing process, a UV curable solid-state electrolyte based on lithium bis(trifluoromethane-sulfonyl) imide (LiTFSI) was specially formulated. It contains poly(ethylene glycol) diacrylate (PEG-DA), LiTFSI, water, and ethyl acetate. The optimized ECDs have achieved a 0.6 s bleaching time at 0.6 V and a 1.4 s coloring time at −0.5 V. The ECDs also exhibited excellent stability, which could endure 100 000 cycles of color switching while still maintaining 35% of transmittance change at a 550 nm wavelength. A demo ECD has been fabricated with a screen printed electrolyte, exhibiting stable switching between the clear state and patterned color state.
研究领域:
材料科学
·
电化学
·
能源效率
·
制造技术
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DOI
高影响因子
LANGMUIR
·
2021
·
IF 3.882
Jixi Zhang,Ligui Zhang,Xiao Gong
With the rapid development of bionic science and manufacturing technology, superhydrophobic surfaces have received extensive attention and research. However, the cumbersome steps, high cost, fluorine pollution, and poor durability greatly restrict its commercial promotion and application. Here, a simple spraying method is used to construct wear-resistant superhydrophobic coatings on various substrates such as glass, filter paper, copper sheets, and polyethylene terephthalate films, using an integrated fluorine-free suspension consisting of silica micropowder, nanofumed silica, epoxy resin, and polydimethylsiloxane. The prepared superhydrophobic coating can withstand 75 sandpaper abrasion cycles and can still maintain good superhydrophobic performance after other physical tests (e.g., hand kneading and tape peeling after knife scraping). In addition, the coating is extremely water-repellent under harsh conditions such as strong UV irradiation and extreme chemical corrosive media. In the buoyancy test, the coated filter paper can bear 39 times its own gravity. This water-repellent interface also has the ability to self-clean in air and oil environments due to its ultralow adhesion to water droplets. Thanks to its simplicity, cheapness, and environmental friendliness, this superhydrophobic coating has promising applications in the fields of construction, chemicals, transportation, and electronics.
研究领域:
材料科学
·
环境科学
·
制造技术
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DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
Zhou Chenchen,Liang Shuaishuai,Qi Bin,Liu Chenxu,Cho Nam-Joon
In the quest for miniaturization across technical disciplines, microscale ceramic blocks emerge as pivotal components, with performance critically dependent on precise scales and intricate shapes. Sharp-edged ceramic microparticles, applied from micromachining to microelectronics, require innovative fabrication techniques for high-throughput production while maintaining structural complexity and mechanical integrity. This study introduces a “one-pot microfluidic fabrication” system incorporating two device fabrication strategies, “groove & tongue” and sliding assembling, achieving an unprecedented array of microparticles with diverse, complex shapes and refined precision, outperforming traditional methods in production rate and quality. Optimally designed sintering profiles based on derivative thermogravimetry enhance microparticles’ shape retention and structural strength. Compression and scratch tests validate the superiority of microparticles, suggesting their practicability for diverse applications, such as precise micromachining, sophisticated microrobotics and delicate microsurgical tools. This advancement marks a shift in microscale manufacturing, offering a scalable solution to meet the demanding specifications of miniaturized technology components.
研究领域:
材料科学
·
微工程
·
制造技术
·
纳米技术
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）