CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Muhammad Saqib,Weilong Ren,Qumail Arshad,Ali Asghar,Mohsin Raza,Muhammad Hamza,Zhangwei Chen
Silicon nitride ceramics demonstrate significant promise for additive manufacturing, particularly in the fabrication of complex geometries. However, challenges such as a high refractive index and natural hydrophilicity hinder the stability and printability of Si 3 N 4 slurries for vat photopolymerization-based stereolithography. This study addresses these limitations by optimizing slurry parameters, including viscosity, sedimentation stability, and curing depth, to enhance printing performance. A systematic investigation was conducted using the Taguchi method to analyze the effect of solid content, dispersant concentration, and resin ratio on slurry behaviors. Rheological analysis revealed shear-thinning behavior in all tested slurries, a characteristic that facilitates smooth and uniform layer deposition during printing. Sedimentation and stability tests over 50 days identified a slurry formulation with 50 vol% solid content, 3 wt% dispersants, and a 1:2 resin ratio as optimal for minimizing sedimentation and ensuring homogeneity. Curing depth analysis indicated that increased solid content reduces light penetration due to scattering, necessitating a carefully balanced formulation. The addition of E51 resin enhanced light penetration and slurry uniformity, optimizing the curing process. The optimized slurry formulations enabled the precise 3D printing of complex green bodies, achieving excellent layer adhesion and dimensional accuracy. This study establishes a detailed framework for enhancing the printability of Si 3 N 4 slurries, addressing key challenges associated with viscosity, stability, and curing behavior, and advancing the application of non-oxide ceramic in additive manufacturing.
研究领域:
材料科学
·
增材制造
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Tianya Hu,Duan Yuan,Xiao Fu,Shuai Zhang,Fanfan Cui,Fengchen Li,Huixia Zhou,Xiaoyu Wang,Yong Hong Meng,Yurong Guo
The K + -induced pectin-based vitrimer hydrogel ink, with dynamic exchange properties, offers an innovative solution for single-channel extrusion-based 3D food printing. However, forming hydrogen-bonded cross-linked vitrimer traditionally requires over 150 mM of K + to overcome the electrostatic repulsion between enzyme-modified pectin (EMP) molecules, which raises health concerns due to the high K + content. This study developed a novel strategy to introduce Ca 2+ bridges to partially weaken the electrostatic repulsion, fabricating low-K + vitrimer gel inks. Using 67 mM K + and 0.9 mM Ca 2+ , a densely cross-linked gel (Ca-EMP-K 67 mM) was formed at 25 °C, exhibiting excellent mechanical performance (~140 g hardness). Meanwhile, the gel possessed excellent self-healing properties, with a relaxation time of 8.3 s at 80 °C, confirming its vitrimer status. Notably, the Ca-EMP-K 67 mM gel ink achieved a ~ 55 % reduction in K + doses while enabling an increase in shaping temperature from 4 °C to 25 °C, compared to the traditional EMP-K 150 mM gel ink. These advancements enabled a low-K + pectin ink for ambient 3D printing. The introduction of Ca 2+ not only reduces the K + concentration requirement but also increases the shaping temperature, broadening the gel ink's applications in the food industry.
研究领域:
食品科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Meiqiong Zheng,Leqi Li,Xinyuan Ye,Zichong Ji,Yuli Wang,Zonglei Wang,Shihong Lin,Mingzhe Wang,Wenqing Yan,Jiawei Yang,Pengcheng Zhou,Yujie Zhang,Runzi Niu,Hossam Haick,Yan Wang
The rapid advancement of wearable electrophysiological monitoring has driven a growing demand for soft, conductive materials, particularly hydrogels, due to their exceptional mechanical properties, high conductivity, and biocompatibility. However, hydrogel materials are prone to freezing at subzero temperatures, which leads to material failure. Additionally, prefabricated hydrogel electrodes often lack sufficient conformability and long-term stability, thereby limiting their practical applications. We report a skin-printable hydrogel-based epidermal bioelectrode designed for continuous, high-precision wireless electrophysiological monitoring. The hydrogel, synthesized via an effective one-pot process, comprises gelatin, glycerol, ammonium chloride, and water. Its reversible thermal phase transition enables precise printing onto glabrous and hairy human skin. The in-situ formed hydrogel electrode exhibits excellent adhesion at both the hydrogel/skin and hydrogel/electrode interfaces, with adhesion force reaching 0.9 N/cm and 2.6 N/cm, respectively. The incorporation of glycerol and ammonium chloride imparts remarkable anti-freezing properties, allowing the hydrogel to maintain outstanding mechanical flexibility across a broad temperature range, from ultra-low temperatures of −80 °C to the phase transition temperature of 43.9 °C. Remarkably, the hydrogel retains its optical transparency even when immersed in liquid nitrogen. Additionally, the hydrogel demonstrates superior self-healing, high water retention, and recyclable properties. We successfully validated the hydrogel’s potential for personalized healthcare through high-fidelity electrocardiogram recordings over 80 min during various daily activities, demonstrating its practical applicability. This work highlights the versatility and functionality of skin-printable hydrogel as a promising material for next-generation epidermal electronics.
研究领域:
生物医学工程
·
材料科学
·
电子皮肤
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Kun Zhang,Kuanjun Fang,Fuyun Sun,Yawei Song,Haibo Qin
Textile coated by natural polymer is an industrial method for enhancing the inkjet printing qualities. However, the hydrophobic modified polymer coating has been rarely reported. Here, the effect of hydrophobic methyl cellulose (MC) coating on the inkjet printing qualities of cotton fabric was investigated and compared with commonly used sodium alginate (SA) and sodium carboxymethyl cellulose (CMC) coatings. The results show that all three polymers could improve the sharpness and color depth of inkjet printing. However, the effect of the MC coating was far better than the SA and CMC coatings, which results from the different functional groups of the three polymers. Methyl groups make MC coating hydrophobic, while the SA and CMC coatings exhibit hydrophilicity. The hydrophobicity and swelling of the MC coating could synergistically reduce the spreading and penetrating of ink droplets. SA and CMC coatings rarely reduced the flow of ink droplets and only preserved part of ink by the swelling property. This work reveals the action mechanism of the polymer coating. And it is confirmed that the hydrophobic natural polymer coating is more effective than the hydrophilic coating to enhance the inkjet printing qualities.
研究领域:
纺织科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2024
·
IF 4.9
Yang Jingjing,Zhao Jiyang,Xie Rui,Wu Cheng,Huang Fang
To address the challenges of low fixation and poor resistance to staining on white ground of reactive dyes in the dyeing and printing industry, two new polyfunctional reactive dyes (MFA-1 and MFA-2) were developed. These dyes, which contained m-phenylenediamine derivatives with sulfonic and methyl groups as bridge groups, demonstrated high solubility (above 350 g/L) and low affinity to fibers. Detailed investigations were conducted to understand the factors affecting printing performance. The two dyes exhibited exceptionally high fixations of 94.35% and 95.75%, respectively, on cotton fabrics at a high dye concentration of 5.0%. This represented a 24% and 43% improvement over C.I. Reactive Red 111 and C.I. Reactive Red 120, respectively. Notably, MFA-2 achieved a fixation above 95% even at a higher dye concentration of 10.0%. Additionally, both MFA-1 and MFA-2 showed minimal staining on white ground, with fastness properties of grades 3 and 4, respectively, representing 2–3 grades higher than C.I. Reactive Red 111 and C.I. Reactive Red 120. The mechanism behind the exceptional fixation and low staining properties of these dyes was proposed, suggesting that the unique structure of the bridge group disrupted the co-planarity of the dye molecule and evenly distributed the negative charge in the dye molecule. Furthermore, the cotton fabrics printed with MFA-1 and MFA-2 demonstrated good color uniformity, with low ΔE values of 0.46 and 0.32, respectively. The printed fabrics also exhibited good dry and wet rubbing fastness (grades 4 and 3, respectively), wash fastness (grades 4–5), light fastness (grade 4), and perspiration fastness (grades 4 or 4–5).
研究领域:
纺织化学
·
染料工业
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Haibo Ouyang,Wenlu Li,Cuiyan Li,Tianzhan Shen,Leer Bao,Sirui Wu
ZrO 2 @C spherical powder was synthesized via a solvothermal method and utilized in the fabrication of ZrC ceramics through direct ink writing (DIW) to enhance rheological properties and reduce sintering temperature. The effects of solid content on the rheological behavior and printability of the ZrO 2 @C paste were systematically investigated. The ZrO 2 @C paste exhibited typical pseudoplastic fluid characteristics and viscoelastic properties, demonstrating excellent shape retention and shear-thinning behavior. Optimal solid content and printing speed were determined to be 54 wt% and 100 mm/s, respectively, leading to superior printability. Using these optimized parameters, green bodies with planar and lattice structures were rapidly and precisely fabricated. After reactive sintering at 1600 °C, the resulting ZrC ceramic achieved a promising bending strength of 30.9 MPa. This study provides a robust strategy for the rapid fabrication of ultrahigh-temperature ceramics with complex geometries.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2025
·Vol. 14
·期 2
·198
·
IF 5.1
Huajiang Zhang,Shihui Hua,Mengzhuo Liu,Rui Chuang,Xin Gao,Hanyu Li,Ning Xia,Chaogeng Xiao
Meringue has limited the use of meringue for personalization because of its thermally unstable system. Citric acid (CA) enhancement of egg white protein (EWP) foaming properties is proposed for the preparation of 3D-printed meringues. The results showed that CA increased the viscosity, exposure of hydrophobic groups (79.8% increase), and free sulfhydryl content (from 5 µmol/g to 34.8 µmol/g) of the EWP, thereby increasing the foaminess (from 50% to 178.2%). CA treatment increased the rates of adsorption, stretching, and orientation of EWP at the air–water interface to form multiple layers, resulting in a delay in foam thinning. The secondary structure of CA-treated EWP remained intact, and the exposure of amino acid residues in the tertiary structure increased with the expansion of the hydrophobic region. CA-treated EWP-prepared protein creams had a suitable viscosity (from 233.4 Pa·s to 1007 Pa·s at 0.1 s−1), shear thinning, structural restorability, and elasticity, which ensured good fidelity of their printed samples. Experiments involving 3D printing of CA-treated EWP showed that CA could significantly enhance the 3D printing fidelity of EWP. Our study could provide new ideas for the development of customizable 3D-printed foam food products.
研究领域:
食品科学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
Nano-Micro Letters
·
2021
·Vol. 13
·期 1
·1-14
·
IF 16.419
Lin Xiuzhu,Li Fan,Bing Yu,Fei Teng,Liu Sen,Zhao Hongran,Zhang Tong
A printable multifunctional electronic skin (e-skin) with an excellent self-healing ability was developed via a simple, clean and universally applicable method.
Water served as both the only solvent throughout the fabrication process and the trigger of the self-healing process. Each e-skin component was biocompatible.
Combined with conventional electronics, signals collected by the e-skin could be transmitted to smartphones via Bluetooth for post-processing.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Shen Saiji,Shen Jiayin,Shen Hongdou,Wu Chu,Chen Ping,Wang Qigang
Polymer hydrogels are ideal bioprinting scaffolds for cell-loading and tissue engineering due to their extracellular-matrix-like structure. However, polymer hydrogels that are easily printed tend to have poor strength and fragile properties. The gradually polymerized reinforcement after hydrogel printing is a good method to solve the contradiction between conveniently printed and high mechanical strength requirement. Here, a new succinct approach has been developed to fabricate the printable composite hydrogels with tunable strength. We employed the HRP@GOx dual enzyme system to initiate the immediate crosslinking of chondroitin sulfate grafted with tyrosine and the gradual polymerization of monomers to form the composite hydrogels. The detailed two-step gelation mechanism was confirmed by the Fluorescence spectroscopy, Electron paramagnetic resonance spectroscopy and Gel permeation chromatography, respectively. The final composite hydrogel combines the merits of enzymatic crosslinking hydrogels and polymerized hydrogels to achieve adjustable mechanical strength and facile printing performance. The dual-enzyme regulated polymer composite hydrogels are the promising bioscaffolds as organoid, implanted materials, and other biomedical applications.
研究领域:
生物材料学
·
组织工程学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
Jiang Haojie,Yuan Bin,Guo Hongtao,Pan Fei,Meng Fanmao,Wu Yongpeng,Wang Xiao,Ruan Lingyang,Zheng Shuhuai,Yang Yang,Xiu Zheng,Li Lixin,Wu Changsheng,Gong Yongqing,Yang Menghao,Lu Wei
Integration of functional fillers into liquid metals (LM) induces rheology modification, enabling the free-form shaping of LM at the micrometer scale. However, integrating non-chemically modified low-dimensional materials with LM to form stable and uniform dispersions remain a great challenge. Herein, we propose a solvent-assisted dispersion (SAD) method that utilizes the fragmentation and reintegration of LM in volatile solvents to engulf and disperse fillers. This method successfully integrates MXene uniformly into LM, achieving better internal connectivity than the conventional dry powder mixing (DPM) method. Consequently, the MXene/LM (MLM) coating exhibits high electromagnetic interference (EMI) shielding performance (105 dB at 20 μm, which is 1.6 times that of coatings prepared by DPM). Moreover, the rheological characteristic of MLM render it malleable and facilitates direct printing and adaptation to diverse structures. This study offers a convenient method for assembling LM with low-dimensional materials, paving the way for the development of multifunctional soft devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Building Engineering
·
2024
·
IF 6.7
Kang Han,Fei Gu,Huashan Yang,Xinchen Tian,Xiangqin Du
Red mud-based geopolymers are an efficient alternative to resolve the high cement consumption in 3D printed concrete (3DPC). From a materials perspective, good printability and mechanical properties are critical to adopting red mud-based geopolymers in 3DPC. In this study, we selected bauxite tailings-red mud and blast furnace slag to prepare geopolymers. Polyvinyl alcohol (PVA) fibers with 0, 0.3 %, 0.6 %, 0.9 %, and 1.2 % volume fractions were used to reinforce 3D printed red mud-based geopolymers. To evaluate the influence of PVA fiber on the printability and mechanical properties of 3D printed red mud-based geopolymer. We tested the workability, extrudability, structural build-up ability, shape stability, and mechanical properties of the red mud-based geopolymer containing different volume fraction PVA fibers, and a microstructural analysis was performed to reveal the interface bond between the fibers and the geopolymer matrix. The results showed that adding PVA fibers impaired the workability of the red mud-based geopolymer mortar. The red mud-based geopolymer mortar showed a more than threefold increase in extrusion pressure compared to the control mixture (P0) when adding 1.2 % vol fiber. For all other mixtures, the increase was less than twice that of the control mixture. The PVA fiber had a significant positive impact on the structural build-up ability and shape stability of the 3D printable red mud-based geopolymer. In addition, PVA fibers promoted the bending strength of the hardened geopolymer specimens better than the compression strength, and the geopolymer gel on the fibers indicated the good interfacial bonding ability of the PVA fiber. This study demonstrates the feasibility of 3D printed red mud-based geopolymer and the reinforcement of 3D printed red mud-based geopolymer by PVA fibers, providing a material perspective to increase the range of red mud applications in 3D printed concrete.
研究领域:
材料科学
·
土木工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Rui Yin,Chen Zhang,Youyou Chen,Yu Wang,Qiang Feng,Yaming Liu,Minghan Yu,Yunhuan Yuan,Cheng-Yan Xu,Feihua Liu,Weiwei Zhao
Transient and recyclable elastic materials have gained tremendous attention in the development of next-generation electronics. However, the fabrication of robust and printable electronic materials at mild conditions with biopolymer-based materials remains challenging. As a common and benign natural polymer, gelatin has easy availability, water solubility, good flexibility, and full biodegradability, yet its electromechanical performance is poor. Herein, a transient and recyclable gelatin hydrogel with remarkable mechanical resilience, conductivity and printability is constructed by a mild two-step reduction of the incorporated graphene oxide (GO) in ascorbic acid and sodium citrate solutions. The integration of reduced graphene oxide (rGO) in the gelatin hydrogel not only provides abundant multiple non-covalent interactions to dissipate the mechanical energy but also endows the hydrogel with desirable electrical conductivity, with the fracture stress and conductivity improved by 53 and 33 times, respectively. Under the synergistic merits, the hydrogel can be assembled as a compliant electromagnetic shielding layer with a shielding effectiveness of 29.4 dB, as well as resistive and capacitive sensors with high sensitivity (0.84 kPa −1 ), large gauge factor (8.2) and excellent stability (>20000 cycles under 60 kPa). As a proof-of-concept, the hydrogel was directly injected onto skin and assembled into a fully degradable self-powered sensing system for Morse code demonstration, and the hydrogel is permeable, photothermally healable, and washable. This work is a step towards the low-cost, ambient and scalable fabrication of green, reliable and versatile flexible electronics.
研究领域:
材料科学
·
生物医学工程
·
柔性电子学
✓ 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）