CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Li Wan,Xueqi Chen,Peng Hu,Lijie Wang,Guowen Xiong,Yuxin Gou,Fanrong Ai
Currently, ceramic dentures are mainly obtained by using computer-assisted cutting block of material to obtain the shape as the removing a model of patient's mouth. Followed by immersion coloring, porcelain stacking, and sintering to obtain dentures similar to a patients' tooth, this is a large-loss and complex process. In this study, 16 standard tooth samples were successfully reduced by adding Fe 2 O 3 , Pr 6 O 10 , Er 2 O 3 , and MnO 2 . After the colorful ceramic powder and photosensitive resin were configured into a slurry, a close to the sample tooth dentures was successfully prepared using digital light processing (DLP). The flexural strength and compressive strength of the ceramic specimens prepared by this method reached 821.01 ± 51.72 MPa and 2.67 GPa ± 0.22 MPa. To verify the biosafety of the prepared ceramics, we performed an in vitro biological evaluation of rat fibroblasts (L929). The resulting showed that the extracts of the prepared ceramic teeth had good biosafety, and the cells could also attach to the surface of the prepared ceramics. Hemolysis experiments confirmed good blood compatibility. Thus, our results show that DLP-printed standard tooth-colored ceramic dentures have good mechanical properties and biocompatibility, and can provide a solution to patients seeking quick access to aesthetic dentures.
研究领域:
材料科学
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生物医学工程
·
口腔医学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Guoan Qi,Yong Zeng,Jimin Chen
Porous tin oxide-based (SnO 2 -based) ceramics with lattice structures were prepared by digital light processing (DLP) 3D printing technology. A 57 wt% SnO 2 -based DLP slurry was prepared by rheological experiments. By optimizing the exposure time, the DLP process for preparing SnO 2 based ceramics had better molding accuracy. The printing size error could be controlled at about 1.8%. The degreasing and sintering curves were obtained by thermogravimetric-differential scanning calorimetry (TG-DSC) analysis, and the SnO 2 -based porous ceramics with porosity of 50%–71% were prepared. The SnO 2 -based ceramics with high densification could be obtained by sintering at 1300 °C for 2 h. The relative density of printed SnO 2 -based ceramics was about 92%. In this paper, zinc oxide (ZnO) was selected as a sintering additive to promote the densification of SnO 2 ceramics. According to the characterization methods of scanning electron microscopy(SEM), X-ray diffraction(XRD), Energy dispersive spectrometer (EDS) and relative density, the optimum doping amount of ZnO was 9 wt%. The influence of pore structure on compressive strength was analyzed by finite element simulation and compressive test. The compressive strength of porous ceramics could be reduced from 1.56 MPa to 0.27 MPa by controlling the porosity of the porous lattice from 50% to 71%. The compressive strength of the solid block was 160 MPa. In this study, the porous SnO 2 -based ceramics prepared can be used in porous electrodes, lithium-ion batteries, supercapacitors , catalysts, sensors and other fields in the future.
研究领域:
材料科学
·
陶瓷工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yiru Shen,Ying Sun,Bocheng Jin,Ming Li,Bohang Xing,Zhe Zhao
With no extra assistance of CIP or HIP, YAG transparent ceramics were successfully fabricated by digital light processing (DLP) stereolithography method followed by careful debinding and vacuum sintering. We systematically studied the effect of heating rate, atmosphere during debinding and the heating rate, holding time during sintering on the light transmittance of YAG ceramics. All results indicated that debinding in the 95N 2 /5H 2 mixture is the key controlling factor for achieving better densification and optical properties , regardless of the sintering profile. However, a lower heating rate can indeed promote the densification process and balance some shortcomings linked with the debinding in air. At least, three different debinding processes and three different sintering profiles are combined, which leads to a high in-line transmittance of ∽77%.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
Virtual and Physical Prototyping
·
2024
·
IF 10.2
Wang Guo,Ping Li,Yanting Wei,Lei Zhao,Yuanheng Pang,Yanjian Huang,Xiaotong Ye,Shan Wang,Bin Liu,Hui You,Yu Long
Hydroxyapatite (HA) is widely used in bone scaffold development, but still faces problems of forming difficulty, slow degradation, and limited biological performance. In this study, triply periodic minimal surface (TPMS) porous HA scaffolds were prepared using desktop-level DLP and then doped with bredigite (BR) to enhance their performance through ion substitution to adjust microstructure. The DLP-prepared scaffolds displayed intricate curved surface porous structure, and their micro-porosity decreased while grain size increased with sintering holding time. During sintering, Mg2+ from BR substituted Ca2+ in HA, forming new secondary phases, which slightly decreased grain size while significantly increased micro-porosity. These factors slightly reduced mechanical properties while significantly enhanced degradation. The rapid release of inorganic active ions from BR and new phases enhanced the biomineralization and cell response. This study demonstrated the potential of using desktop-level DLP to construct complex porous ceramic scaffolds and using ion substitution to modulate their microstructure and performance.
研究领域:
生物材料学
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骨组织工程
·
3D打印技术
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产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Da Bian,Junnai Wang,Jie Guo,Xinjian Cao,Shanhua Qian,Jun Yang,Weimin Liu
Digital light processing (DLP) has been widely utilized in ceramic additive manufacturing, while research on its application for fabricating metallic materials remains in the initial stages. In this paper, the geometric accuracy, mechanical and tribocorrosion properties of AISI 316 L prepared by DLP (DLP-316L) are systematically evaluated. DLP technology exhibits high forming accuracy in additive manufacturing of metal parts, with dimensional errors controllable within ± 70 μm and surface roughness of 1.6 μm. The microstructure of DLP-316L comprises austenite with minor δ-ferrite and M 23 C 6 /M 7 C 3 carbides. The carbides originate from residual carbon due to incomplete decomposition of photosensitive resin during debinding, while δ-ferrite forms during prolonged high-temperature sintering at 1380 °C for 6 h. It not only has a high ultimate tensile strength of 543.5 MPa, but more importantly, the fracture elongation can reach 58.73 %, which is at a high level in the preparation of AISI 316 L using DLP. In addition, the tribocorrosion performance of DLP-316L in 3.5 wt% NaCl solution is better than that of the commercial as-rolled AISI 316 L. This is mainly attributed to the presence of a small amount of high-hardness carbides in the microstructure, which improves the wear and corrosion resistance of the material.
研究领域:
材料科学
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增材制造
·
表面工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Guoxuan Xu,Ketao Hu,Rui Zhou,Ruizhe Xing,Jie Kong
This work introduces a novel digital light processing (DLP) printable SiBCN(O) ceramic precursor (UV-hPBSZ), derived through a straightforward aminolysis approach. The unique hyperbranched molecular structure of UV-hPBSZ leads to remarkable UV curing efficiency, excellent printability, satisfied ceramic yield, and consistent shrinkage ratio. UV-hPBSZ also exhibits superior resistance against cracking and collapse during the polymer-to-ceramic process, thus enabling the fabrication of intricate SiBCN(O) ceramic structures. Upon pyrolysis at 1200 °C, the resulting SiBCN(O) ceramic demonstrates outstanding electromagnetic wave (EMW) absorption performance, achieving full coverage in the X band ( R L min = -36.68 dB). To showcase the design flexibility, a distinctive metastructure is proposed and successfully fabricated using DLP printing technique. This SiBCN(O) metastructure absorber enables impressive EMW absorption in the Ku band (94.6 % coverage), attributed to surface resonance effects and multiple internal reflections. Moreover, SiBCN(O) ceramics exhibit excellent high-temperature stability, with less than a 1.63 % total mass change from room temperature to 1400 °C. UV-hPBSZ offers a simple but versatile way to control dielectric properties, which opens up new possibilities for multifunctional integrated EMW absorbers suitable for both ambient and high-temperature conditions.
研究领域:
材料科学
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陶瓷工程
·
电磁学
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产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2023
·
IF 8.4
Yue Wang,Yancheng Wang,Chenhao Mao,Deqing Mei
Vat photopolymerization is a widely employed additive manufacturing (AM) technique that commonly applying a digital light processing (DLP) light engine to provide a patterned light source. Notably, printing extreme-size structures is challenging, and the selection of printing parameters was currently highly reliant on repeatable trial-and-error experiments. In this work, a theoretical model for curing depth prediction was established by observing the effect of light intensity. A correction factor n was introduced to optimize the relationship among the critical curing energy, exposure time, and light intensity. Forming experiments verified the accuracy of the proposed theoretical curing depth prediction model, and a correction factor n equal to 0.75 was obtained. Optical rheological characterization experiments and Fourier transform infrared spectroscopy (FTIR) supported the quantitative characterization of the DLP printing process while revealing a stepwise transition during photocuring. Finally, a guidance for quick selection of the optimal curing time for 3D structure was obtained and applied to the high-precision microstructure printing process. High-fidelity microneedle arrays with 12 μm details were printed. This method of rapid selection of printing parameters and printing microstructures with high-precision details can potentially be used in the field of 3D bioprinting.
研究领域:
材料科学
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生物制造
·
光学工程
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产品关联
DOI
高影响因子
International Journal of Bioprinting
·
2023
·
IF 8.4
Jianpeng Gao,Hufei Wang,Ming Li,Zhongyang Liu,Junyao Cheng,Xiao Liu,Jianheng Liu,Xing Wang,Licheng Zhang
Intramembranous ossification (IMO) and endochondral ossification (ECO) are two pathways of bone regeneration. The regeneration of most bone, such as limb bone, trunk bone, and skull base bone, mainly occurs in the form of endochondral ossification, which has also become one of the effective ways for bone tissue engineering. In this work, we prepared a well-structured and biocompatible methacrylated gelatin/polymethacrylic acid (GelMA/PMAA) hydrogel by digital light processing (DLP) printing technology, which could effectively chelate iron ions and continuously activate the hypoxia-inducible factor-1 alpha (HIF-1α) signaling pathway to promote the process of endochondral ossification and angiogenesis. The incorporation of PMAA endowed the hydrogel with remarkable viscoelasticity and high efficacy in chelation of iron ions, giving rise to the activation of HIF-1α signaling pathway, improving chondrogenic differentiation in the early stage, and facilitating vascularization in the later stage and bone remodeling. Therefore, the findings have significant implications on DLP printing technology of endochondral osteogenesis induced by the iron-chelating property of biological scaffold, which will provide an effective way in the development of novel bone regeneration.
研究领域:
组织工程
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生物材料
·
再生医学
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产品关联
DOI
PubMed
高影响因子
International Journal of Applied Ceramic Technology
·
2019
·Vol. 17
·期 3
·844-853
·
IF 1.074
Xingbang Li,He Zhong,Jingxian Zhang,Yusen Duan,Jingjing Li,Dongliang Jiang
Zirconia ceramics have shown a wide applicable prospect in dental prosthetics because it possesses excellent mechanical performance and biocompatibility. The rheological behavior and curing properties of zirconia stereolithography slurry were studied, as well as the microstructure of the green, pyrolyzed, and sintered body. Variquat CC-42 NS was proved to be effective for zirconia powder dispersing in photocurable resin (SP-RC700). The curing characteristic of slurry showed that the depth of penetration tended to increase with the solid loading. Finally, the zirconia all-ceramic crowns were fabricated via DLP-based stereolithography printer. Results showed that the particles were evenly distributed in the cured resin matrix without obvious agglomeration, and the interlayered structure disappeared after binder burnout. The sample with a major crystalline phase of tetragonal zirconia and a porosity of 10(1)% were obtained after sintering at 1550°C.
研究领域:
口腔材料学
·
生物医学工程
·
陶瓷材料科学
·
增材制造
·
牙体修复学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaomin Zhang,Youjie Rong,Huijie Li,Jianhua Fei,Xiaobo Huang,Qingbo Bao,Jian An
Due to good stretchability, conductive gels have significant advantages in the field of manufacturing wearable flexible electronic devices. However, hydrogel-based and ionogel-based conductive materials reported in previous studies are prone to solvent evaporation and leakage, which would seriously affect the gel electromechanical performance in extreme working environments. In addition, how to manufacture gel-based flexible devices with complex structures is also a significant challenge in this field. Based on this, a photocurable 3D-printed eutectogel system was designed in this work. The precursor solution was composed of N-hydroxymethyl acrylamide (NAM), hydroxyethyl methacrylate (HEMA), and DES solvents. The prepared eutectogel had excellent comprehensive properties, such as good transparency (>80 % in the visible region), high tensile performance (up to 648 %), strong mechanical strength (breaking strength up to 938 kPa), electrical conductivity (up to 78 mS/m at 25 ℃), environmental tolerance (-80 ℃ − 60 ℃), and so on. In addition, flexible wearable devices with complex microstructures can be constructed efficiently by DLP printing technology. In the low-pressure detection range (0–––2.5 kPa), the sensitivity of the printed eutectogel-based microarray was 8.78 times higher than that of the block or sheet gel structure, and various weak deformation signals can be timely and accurately detected. Therefore, the combination of photo-cured 3D printing and eutectic gels will provide new possibilities for the development and promotion of intelligent, flexible wearable devices.
研究领域:
材料科学
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生物医学工程
·
柔性电子
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产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Lisheng Zhu,Youjie Rong,Yueyue Wang,Qingbo Bao,Jian An,Di Huang,Xiaobo Huang
Conductive gels are highly desirable for wearable electronics and sensors. Photocurable 3D printing technology provides an efficient way for the preparation of gel-based microstructured electrodes. However, how to obtain gels with both high stretchability and 3D printability, is still one of the current challenges to customize wearable sensors through 3D printing. Herein, we constructed a photocurable composite mainly composed of N -methylol acrylamide (NAM) and ethylene glycol (EG) for the successful 3D printing of gel-based wearable sensing devices. After printing, abundant hydrogen bonds formed among the hydroxyl groups on the side chains works synergistically with the covalent bonds, enabling the gel to reach excellent mechanical properties and the elongation at break reach 730%. The as-printed gel incorporated with sodium chloride has excellent resistance signal detection ability, which can accurately and stably detect human motion. In addition, the EG endows the printed gels with excellent anti-freezing and anti-drying properties, enabling the wearable sensors to be used in harsh environments. In summary, this work introduced a facile strategy for the rapid preparation of gel-based flexible sensors with microstructure by photocurable 3D printing, which provides the possibilities for the manufacturing of artificial intelligence and smart electronics.
研究领域:
材料科学
·
电子工程
·
可穿戴技术
·
3D打印
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）