Journal of Materials Research and Technology-JMR&T
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2023
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IF 6.4
Jingyi Chen,Ruyue Su,Xiaofei Zhai,Yaru Wang,Xiong Gao,Xueqin Zhang,Yanpeng Zhang,Yan Zhang,Sheng Liu,Rujie He
Ceramic microcomponents have a wide range of applications in microfluidic, sensors, etc. Stereolithography 3D printing technology provided a shortcut for the preparation of this small-size and complex component. With the development of device miniaturization, the existing stereolithography forms cannot meet the demand. To prepare smaller components, it is necessary to decrease the slice thickness ( C s ). But during the stereolithography 3D printing, ceramic is usually easy to over-cure, leading to the key issue in the stereolithography of ceramic microcomponents: the mismatching between the curing thickness ( C p ) and the slice thickness ( C s ). To solve the problem above, this paper started from the stereolithography mechanism of the ceramic/resin slurry and adjusted the matching relationship between C p and C s theoretically by adding a photoabsorber. Then, from the experiments, the influence of different content of photoabsorber (carbon black) on curing thickness, printing accuracy, and sintering accuracy, were studied. Al 2 O 3 ceramic microcomponents that met the design requirements were thus prepared. These results would help in the development of stereolithography 3D printing of ceramic microcomponents.
研究领域:
材料科学
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制造工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2018
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IF 3.057
Xiangquan Wu,Qin Lian,Dichen Li,Xiaoning He,Jiali Meng,Xiaodong Liu,Zhongmin Jin
Mask projection stereolithography can be used to fabricate complex ceramic parts layer by layer through the photopolymerisation of ceramic suspensions. The broadening or lateral overcure of the curing shape occurs because of light scattering effects. Achieving a better dimension and strength quality by adjusting light energy delivery in the boundary mask area has been insufficiently investigated thus far. In this study, the conventional mask was segmented into boundary and interior masks. The exposure time and power of the boundary mask (two pixels wide) were varied to investigate the effects of segmented exposure. The segmented exposure constrained the dimension errors to a width of within two pixels for a feature dimension of less than 1200 µm. It further smoothed the lateral surface of the green part to achieve Ra values of below 6 µm. Moreover, enhancing the boundary mask increased the flexural strength and Weibull modulus to 248 MPa and 11.1, respectively. The results indicate that segmented exposure can potentially be used in complex lattice ceramic structures.
研究领域:
生物医学工程
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材料科学
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增材制造
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DOI
高影响因子
Nature Communications
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2020
·Vol. 11
·期 1
·1-11
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IF 12.121
Xie Junyao,You Xueqiu,Huang Yuqing,Ni Zurong,Wang Xinchang,Li Xingrui,Yang Chaoyong,Zhang Dechao,Chen Hong,Sun Huijun,Chen Zhong
Magnetic resonance (MR) technology has been widely employed in scientific research, clinical diagnosis and geological survey. However, the fabrication of MR radio frequency probeheads still face difficulties in integration, customization and miniaturization. Here, we utilized 3D printing and liquid metal filling techniques to fabricate integrative radio frequency probeheads for MR experiments. The 3D-printed probehead with micrometer precision generally consists of liquid metal coils, customized sample chambers and radio frequency circuit interfaces. We screened different 3D printing materials and optimized the liquid metals by incorporating metal microparticles. The 3D-printed probeheads are capable of performing both routine and nonconventional MR experiments, including in situ electrochemical analysis, in situ reaction monitoring with continues-flow paramagnetic particles and ions separation, and small-sample MR imaging. Due to the flexibility and accuracy of 3D printing techniques, we can accurately obtain complicated coil geometries at the micrometer scale, shortening the fabrication timescale and extending the application scenarios.
研究领域:
生物医学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2024
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IF 5.8
Tao Li,Yuzhen Zhang,Wenyan Duan,Baojie Jin,Zihuan Chen,Shan Li,Bingshan Liu,Gong Wang
The printing accuracy in ceramic stereolithography is deteriorated by shrinkage due to photopolymerization of monomers and broadening owing to scattering of light. To improve the accuracy of printed alumina parts, a series of experiments involving the reduce of shrinkage and broadening were conducted. Firstly, the dependence of conversion of monomers , shrinkage of suspensions and warpage of parts on energy doses was quantitively investigated and correlated, with which the shrinkage was well controlled through optimization. Besides, the warpage problem was effectively resolved when adding 30 wt% PEG-200 in the suspensions to release the accumulated internal stress . Next, the broadening under different energy doses was observed and reduced by addition of absorbers, after which a self-defined parameter C d / W e was applied to suggest strategies in the selection of appropriate processing parameters and absorber content. On this basis, the holes with a diameter ranging from 50–200 μm were successfully printed.
研究领域:
材料科学
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制造工程
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产品关联
DOI
高影响因子
DESALINATION
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2025
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IF 9.8
Shiqiang Liang,Wenbin Wang,Tongyao Wu,Jinkai Zhang,Qindong Wang,Shu Bi,Fan Yang,Chi Wang,Zhi Geng,Zhongmin Su
Nanofiltration (NF) membrane technology, distinguished for high separation performance and energy efficiency, has been extensively employed in desalination and wastewater treatment. Herein, high-precision 3D printing is used to fabricate robust support layers featuring ideal straight-through micropores, effectively minimizing permeation resistance. To ensure the generation of a high-quality PA selective layer, electrospinning deposits a thin nanofiber layer that divides the support layer surface into fine grids. Finally, interfacial polymerization (IP) forms a PA selective layer on the membrane substrate, which is integrated by 3D-printed support layer and nanofiber layer, yielding a highly permeable composite NF membrane. With reduced permeation resistance and enhanced mechanical strength, the novel 3D-printed composite NF membrane maintains a long-term water permeance of above 22.5 L m −2 h −1 bar −1 , about double that of commercial NF270 membranes. Meanwhile, it achieves exceptional Na 2 SO 4 rejection of 97.8 % and superior anti-fouling performance. This study offers a promising approach to fabricating high-performance NF membranes using high-precision 3D printing, providing an innovative and scalable strategy for developing next-generation functional membranes.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Shuo Geng,Shu Min Lin,Shi Gang Liu,Wei Zhang,Nian Bing Li,Hong Qun Luo
We synthesized polyethyleneimine capped ZnO quantum dots (PEI-ZnO QDs) which dispersed well in ethanol by using a two-step method. UV–visible absorption spectroscopy, photoluminescence, Fourier transform infrared spectroscopy, high resolution transmission electron microscope, and field emission scanning electron microscope were used to characterize the as-prepared PEI-ZnO QDs. It emitted green-yellow fluorescence (527 nm) for excitation at 355 nm. We used the PEI-ZnO QDs to determine the alcoholic strength because of its different property in water and ethanol which caused decrease in the PEI-ZnO QDs fluorescence intensity with increasing water content. With this method, we determined the alcoholic strength of different artificial samples with a linear range from 20% to 60% vol and detected commercial spirits with satisfactory results.
研究领域:
化学
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材料科学
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产品关联
DOI
高影响因子
SENSORS
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2019
·Vol. 19
·期 11
·2442
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IF 3.031
Jianpeng Zhang,Yuhang Li,Yufeng Xing
Epidermal electronic sensors (EESs) possess great advantages in the real-time and enduring monitoring of human vital information compared to the traditional medical device for intimately making contact with human skin. Skin strain is a significant and effective routine to monitor motion, heart rate, wrist pulse, and skin growth in wound healing. In this paper, a novel skin sensor combined with a ternary conductive nanocomposite (Carbon black (CB)/Decamethylcyclopentasiloxane (D5)/Silbione) and a two-stage serpentine connector is designed and fabricated to monitor skin strain. The ultrasoft (~2 kPa) and adhesive properties of the ternary conductive nanocomposite ensure the capacity of the EES to intimately couple with human skin in order to improve accuracy with a relative error of 3.39% at strain 50% as well as a large strain range (0~50%) and gauge factor (GF ~2.5). The millimeter scale EES (~5 mm × 1 mm × 100 μm), based on the micro-nano fabrication technique, consisted of a two-stage serpentine connector and screen print of the ternary conductive nanocomposite. EESs with high comprehensive performance (electrical and mechanical properties) are fabricated to confirm the analytical results and monitor the motion of a human hand. The good agreement between experimental and analytical results paves the way for bettering monitoring of skin growth during wound healing in order to avoid necrosis and scarring. This EES in monitoring the motion of a human exhibit presents a promising application for assisting prosthetic movement.Keywords:epidermal electronic sensors;skin strain;high accuracy;millimeter scale
研究领域:
生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Lang Zhang,Haibo Wu,Zehua Liu,Yitian Yang,Huan Liu,Xishi Wu,Bingbing Pei,Jianshen Han,Zhengren Huang
The mullite-whisker-modified SiC porous ceramics were prepared by the oxide bonding method, using two additives (MoO 3 as a mineralizer and AlF 3 as a crystallization catalyst) to promote the growth of mullite whiskers. The microstructure and comprehensive properties of the sintered bodies were adjusted by controlling the sintering temperature and the additive content. The mullite whiskers obtained by controlling the sintering temperature and additives exhibit excellent microstructural characteristics (diameter: 0.1–0.5 μm, length: 3–6 μm, length-to-diameter ratio: 15–25). These formed mullite whiskers effectively intercepted particulate matter, and their interlocking structure provided higher strength to the sintered body. The resultant mullite-whisker-modified SiC porous ceramics demonstrated remarkable mechanical strength (43.8 ± 0.1 MPa) while maintaining high porosity (41.27 %) and excellent gas permeability (1.96 × 10 −14 m 2 ). After undergoing five thermal shock cycles at 850 °C, the material retained 92.69 % of its original strength and exhibited superior filtration efficiency of 99.6 % for PM2.5 particles.
研究领域:
材料科学
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陶瓷工程
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产品关联
DOI
高影响因子
Analytical Methods
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2024
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IF 2.7
Chu Cheng,Qingzhou Cheng,Wei Zhou,Yulong Chen,Wenbin Liu,Zhiling Zhang,Jingsi Ye,Pengfeng Xiao
Eliminating errors in next-generation sequencing has proven to be challenging. Here we present a novel strategy for DNA sequencing, called correctable two-color fluorogenic DNA decoding sequencing, which can significantly improve sequencing accuracy and throughput by employing a dual-nucleotide addition combined with fluorogenic sequencing-by-synthesis (SBS) chemistry. This sequencing method involves introducing a mixture of natural nucleotide X, labeled unblocked nucleotide X′, 3′ blocked nucleotide Y*, and labeled 3′ blocked nucleotide Y* into each reaction cycle. By cyclically interrogating a template twice with different nucleotide combinations, two sets of base-encoding are sequentially obtained, enabling accurate deduction of base sequence. We demonstrate the remarkable efficacy of this approach in detecting and correcting sequencing errors, achieving a theoretical error rate of 0.0005%, which is twice as accurate as Sanger sequencing. Furthermore, we show the capability to detect known mutation sites using information from only a single sequencing run. The correctable two-color fluorogenic DNA decoding sequencing approach should enable accurate identification of extremely rare genomic variations in diverse applications in biology and medicine.
研究领域:
分子生物学
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基因组学
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医学遗传学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yongkang Yang,Boran Wang,Jie Li,Jianglin Wang,Ke Wang,Yue Wang,Shuxin Niu,Xin Li,Xiqing Xu
In the vat photopolymerization (VPP) 3D printing of ceramic cores, the solid loading is generally conducive to the microstructure and performance of products, owing to the improved bonding between adjacent layers and enhanced dimensional accuracy with increasing solid loading. In this work, the content of ceramic powder in photosensitive resin was optimized, the solid loading increased from 56 vol% to 68 vol%, and a novel curing model was established to explain the impact of solid loading on the printing precision. During sintering, the shrinkage is regulated to approximately 3 %, demonstrating a more homogeneous structure. The interlayer strength increased to 11.43 MPa while maintaining an apparent porosity of 23.47 %. Furthermore, the anisotropy of VPP-3D printed ceramic cores dependent on the solid loading was investigated. The ratio of vertical strength to horizontal strength (σ V /σ H ) increased from 0.57 to 0.68 when the solid loading grew from 56 vol% to 68 vol%. At 1540 °C, the value of σ V /σ H was further enhanced to 0.81. This value met the precision casting criteria for ceramic cores effectively. This work can provide a reference for the investigation of high-solid-loading ceramic cores.
研究领域:
材料科学
·
制造工程
✓ 已验证
产品关联
DOI
高影响因子
Virtual and Physical Prototyping
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2025
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IF 8.8
Yongkang Yang,Xiqing Xu,Boran Wang,Shiyuan Li,Ziqi Jia,Xusen Guo,Shuhuai Wang,Shuxin Niu,Xin Li
Vat photopolymerization (VPP) 3D printing technology is suited for intricate ceramic core forming due to its design freedom. However, solving the lateral over-cure width while formation is crucial. Graphene was used in VPP-3D printing of silica-based ceramic cores to examine its effects on forming and sintering, and a desirable curing coefficient was presented to evaluate the forming accuracy of single layer. A straightforward model using a modified Beer–Lambert law based on exposure time rather than exposure power predicts the effect of graphene on the VPP process at consistent curing depth and exposure time and clarifies how the curing process affects flexural strength and surface quality. The optimal graphene content was determined by double bond conversion rate, structural anisotropy, and mechanical properties. Increasing graphene concentration reduces curing sensitivity and exposure time threshold, allowing more liquid phase to cure and improving double bond conversion and interlayer bonding. However, excess graphene increases the conversion rate and stress concentration of green body. According to microstructural studies, extra graphene enhanced the likelihood of crack reformation after sintering. The ceramic cores had optimal forming and sintering capabilities with 0.6 wt.‰ graphene content. The approach offers significant insights for enhancing VPP ceramic 3D printing.
研究领域:
材料科学
·
增材制造
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2018
·
IF 2.311
Yangong Zheng,Hanyu Li,Wenfeng Shen,Jiawen Jian
Human skin odor is an important pheromone that can serve as an indicator for physiological status, or as a “fingerprint” for individual identification. It is a complex task to identify the organic components that constitute skin odor. An electronic nose is proposed to identify skin odors. This paper consists four parts. First is to prepare a gas sensor array, two functionalized carbon nanotubes (CNTs) are encapsulated by three different polymers to form six sensing materials, and they are deposited on a substrate to form a sensing array. A circuit is designed for data acquisition and wireless transmission. Second, gas chromatograph-mass spectrometry (GS-MC) is carried out to demonstrate the organic components of skin odors. Then, humidity and gas sensing properties of the sensor array are evaluated and tested in the laboratory. Third, human study is designed and conducted for monitoring of skin odor using the prepared electronic nose. The last is signal processing, to achieve highly accurate odor identification, contrast response is extracted as the feature. The best clustering accuracy, which is computed by unsupervised K-means, is 91.67%. This paper represents an important step in the research and development of electronic nose for human skin odor identification.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）