Materials Research Express
·
2023
·Vol. 10
·期 4
·045303
·
IF 2.3
Chengqi Yan,Junyue Chen,Zhuying Jia,Zhanjun Li
Hydrogels have similar structural and functional properties to natural articular cartilage, so they have been widely used in the research of biomimetic articular cartilage. In this research, polyvinyl alcohol (PVA) and betaine monomer were used as raw materials to prepare hydrogel on polyetheretherketone (PEEK) surface by Uv light molding and casting molding respectively. The results showed that two methods were used to prepare hydrogel film on PEEK surface successfully. The diameter of the internal hole of the hydrogel prepared by Uv light molding was larger than that prepared by casting molding. Compared with the hydrogels prepared by Uv light molding, the hydrogels prepared by casting molding have a lower friction coefficient because of their high load-carrying capacity. Different preparation methods seriously affect the formation of hydrogel structure. This study provides an important reference value for the preparation of high performance hydrogels.
研究领域:
生物材料学
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仿生学
·
tribology（摩擦学）
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DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2024
·
IF 8.1
Yiwei Zhang,Jiewei Hu,Wenbo Song,Fasheng Zou,Jie Zhang
Polypropylene/elastomer/filler composites are one of the most commonly used materials for spray-free automotive parts to meet the requirements of lightweight. However, its application is serious affected by the flow marks on the surface. Therefore, the reduction or elimination of flow marks defect is important to improve surface quality. In this work, polyolefin elastomer was slightly crosslinked to study its effect on flow marks. The results show that the slightly crosslinking significantly increases the elasticity of elastomer, which makes the melt flow more stable. Meanwhile, the enhanced elasticity is beneficial not only to resist shear deformation of elastomer, but also to recover from deformation during injection molding. As a result, the difference of dispersed phase morphology and surface gloss is reduced, and the flow marks defect is improved. The slightly crosslinked elastomer has little effect on the processability and tensile properties of composites, while the impact properties increase marginally.
研究领域:
材料科学
·
高分子科学
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DOI
高影响因子
Additive Manufacturing
·
2024
·
IF 10.3
Xiang Li,Haijun Su,Dong Dong,Hao Jiang,Yuan Liu,Zhonglin Shen,Yinuo Guo,Zhuo Zhang,Min Guo
Vat photopolymerization (VPP) 3D printing technology allows the fabrication of complex ceramic structure components through the layer-by-layer stacking strategy. The curing depth is a crucial parameter for the stacking process, as it directly impacts the printing quality. Furthermore, this parameter exerts a profound effect on the final quality of the printed part. However, there is currently a lack of comprehensive research on how the curing depth affects VPP ceramic 3D printing . This study aims to thoroughly evaluate the impact of curing depth parameters on critical aspects of the 3D printing process, including the forming accuracy, surface quality, monomer conversion , resin pyrolysis , interlayer defects, and mechanical properties. The results of our investigation clearly demonstrate the significant influence of curing depth on the precision and performance of VPP 3D printed ceramic parts. Ceramic samples produced with higher curing depth exhibited superior surface quality (Ra<1.6 μm) but lower forming accuracy. Increasing the curing depth improved interlayer adhesion but excessive depth led to a decreased monomer conversion content from 5.2 % to 2.0 % and an internal stress in the green body. Moreover, increasing the curing depth intensified the pyrolysis process and increased the propensity for cracks forming, as confirmed by simultaneous thermal analysis and microstructure observations . The flexural strength of the sintered samples reached its maximum value of 630 MPa at three times the printing layer thickness. This study provides valuable insights for selecting appropriate curing depth parameters in VPP ceramic 3D printing.
研究领域:
材料科学
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增材制造
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陶瓷工程
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DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2016
·
IF 3.42
Jie Fei,Ran Liu
Wiping out counterfeit drugs is a great task for public health care around the world. The boost of these drugs makes treatment to become potentially harmful or even lethal. In this paper, biodegradable drug-laden QR code label for anti-counterfeiting of drugs is proposed that can provide the non-fluorescence recognition and high capacity. It is fabricated by the laser cutting to achieve the roughness over different surface which causes the difference in the gray levels on the translucent material the QR code pattern, and the micro mold process to obtain the drug-laden biodegradable label. We screened biomaterials presenting the relevant conditions and further requirements of the package. The drug-laden microlabel is on the surface of the troches or the bottom of the capsule and can be read by a simple smartphone QR code reader application. Labeling the pill directly and decoding the information successfully means more convenient and simple operation with non-fluorescence and high capacity in contrast to the traditional methods.
研究领域:
药学
·
材料科学
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Chi Zhang,Ning Wang,Hai Chang,Yingna Wu,Rui Yang,Dongxu Yao,Zirong Zhai
This study addresses challenges in manufacturing high-quality silicon nitride (Si 3 N 4 ) products using vat photopolymerization (VPP), a method that enables highly precise and complex manufacturing that was previously unachievable. A comparison of VPP and cold isostatic pressing (CIP) showed that the intergranular phases of VPP samples exhibited continuous network assembly, while the intergranular phases of CIP samples were dispersed and aggregated. For densification, VPP samples required more aggressive sintering conditions and a higher MgO content. This prolonged densification process adversely affected thermal conductivity, only reaching a maximum of 70.91 W m −1 ·K −1 . Through annealing, thermal conductivity of VPP sample improved by 72.44 %, narrowing the gap with CIP sample (90.28 W m −1 ·K −1 ) and reaching up to 96.20 W m −1 ·K −1 . Si 3 N 4 sample exhibiting high flexural strength of 908.28 ± 46.90 MPa were prepared using VPP. This study proposes a viable approach for producing high-performance Si 3 N 4 heat exchangers and other complex devices via VPP.
研究领域:
材料科学
·
制造工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 14
·12161-12168
·
IF 2.324
Xie Fan,Qin Panliang,Zhuo Longhai,Lu Zhaoqing,Wang Yafang
The synthesis of ZnO nanowires (NWs) on aramid fiber (AF) surface via a facile in situ hydrothermal method was studied and the as-obtained AFs@ZnO NWs acting as the thermal conductive fiber fillers in the fabrication of aramid paper-based materials by wet-forming process were also investigated. SEM showed a dense and uniform ZnO NWs layer with vertical alignment was well established on surface of AFs. EDS and XRD characterization further confirmed the formation of ZnO NWs on AFs surface. Compared with the pristine paper, the composite paper exhibited better thermal conductivity increased by 129% from 0.0867 to 0.1985 W/m K and kept good insulating properties inherent to aramid paper. The excellent thermal conductivity of aramid paper was mainly attributed to the effective heat conduction networks formed by the AFs@ZnO NWs within the aramid paper. This study proposed an innovative way to fabricate fibrous thermally conductive filler, which effectively improved the dispersion, retention of fillers and interfacial bonding between fillers and fibers.
研究领域:
材料科学
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纳米技术
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DOI
高影响因子
Science Advances
·
2025
·Vol. 11
·期 17
·
IF 12.5
Zhenggang Gong,Xianggang Weng,Deli Wu,Zhendong Lei,Guangxu Yang,Li Shuai
Increasing efforts have been devoted to developing biobased and biodegradable plastics and composites from lignocellulosic biomass. Current bioplastic production entails multiple challenging steps including monomer production from biomass as well as polymer synthesis and modification. Here, we report a practical recombination strategy to transform agricultural residues into moldable cellulose-reinforced lignin (CRL) composites. The strategy involves deconstruction of biomass particles followed by thermo-compression molding of cellulose fibers and lignin mixtures. The resulting CRL composites demonstrated excellent mechanical and thermal properties as well as water, abrasive, and flame resistance. Mechanistic studies reveal that small particle size, removal of water-soluble fractions, as well as reservation of lignin and its cross-linking reactivity have considerably positive effects on preparation of high-quality composite items. These insights offer a versatile strategy for transforming various types of low-grade biomass, such as corn stover, into eco-friendly and potentially biodegradable or compostable composites that can serve as sustainable alternatives to traditional duroplast materials.
研究领域:
材料科学
·
生物工程
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Guangren Qu,Yawen Bo,Qihan Gong,Yanxi Li,Hua Xu,Jinbo Lai,Jiayu Ding,Sheng Liu,Kebin Chi,Dejun Shi,Rongguan Li,Chun Deng,Xili Cui,Huabin Xing
Metal-organic framework (MOF) ZnAtzPO 4 enables precise control of the pore size to achieve C 2 H 4 /C 2 H 6 adsorption separation. However, the industrial application of MOF powder faces problems such as pipe clogging and dust pollution, and the key to solving these problems lies in shaping. The shaped material should enhance mechanical stability while maintaining its physicochemical properties. This study aimed to explore the effects of shaping on the physicochemical properties of ZnAtzPO 4 using different binders. Hydroxypropyl cellulose (HPC), polyethylene glycol (PEG), sodium alginate (SA), and starch were used as binders, and the shaping body of ZnAtzPO 4 was prepared by extrusion shaping in different proportions. A series of characterization experiments such as XRD, BET, XPS, and mechanical strength testing, were carried out, then C 2 H 4 and C 2 H 6 adsorption isotherms were collected, and breakthrough experiments were performed on C 2 H 4 /C 2 H 6 (50:50 and 80:20 v/v) gas mixture. The selection of binders and the different proportions have significant impacts on the mechanical strength and adsorption properties of the shaped body, in which the shaped adsorbent with 5 % HPC shows a considerably high mechanical strength of 70.50N/cm, the ethylene adsorption capacity of that is up to 89 % of the powder, and the breakthrough experiments showed about 80 % adsorption separation time of ethylene/ethane compared to powder, exhibiting the best overall performance. Additionally, the 5 % HPC-shaped extrudate exhibits excellent cyclic stability and maintains crystalline integrity in both acidic and alkaline environments. The comprehensive investigation provides valuable insights into the shaping of MOF materials and helps to promote the practical application of MOFs in gas separation technology.
研究领域:
材料科学
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化学工程
·
工业应用
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DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2024
·
IF 11
Yin Xiong,Zilong Zhao,Nana Zhang,Zixian Zhu,Yu Liu,Hao Zhang,Wei Chen,Daming Fan
Microwave 3D printing of surimi has temperature limitations and transglutaminase dependence. The current study aimed to achieve microwave 3D printing of surimi at higher temperatures (45–80 °C) with the combination of thermally reversible gelatin and κ-carrageenan to eliminate reliance on the transglutaminase and improve the molding capacity of products. Our results showed single surimi cannot be stacked when printed at 45 °C while it can be successfully extruded and molded at 80 °C after adding a combination of gelatin and κ-carrageenan to surimi paste. According to rheological data, κ-carrageenan provided the surimi paste with good elastic properties while gelatin lowered the paste's viscosity when heated. Particularly, the microwave 3D printed surimi with 4.5% κ-carrageenan and 1.5% gelatin at 80 °C exhibited relatively optimum gel strength and mechanical characteristics. The results concerning water distribution and microstructure suggested that the microwave printing process could limit the flow of water and enhance the ability of the products to retain moisture, meanwhile, the products printed at 80 °C displayed a relatively more comprehensive gel network structure. Furthermore, molecular force analysis showed hydrophobic and disulfide bond contents increased significantly with the increase of κ-carrageenan at 80 °C, suggesting the promoted protein-colloid cross-linking during microwave heating. In general, gelatin and κ-carrageenan can effectively regulate the surimi gel process during microwave 3D printing at higher temperatures, and improve the molding capacity of final products, which provide a new pattern for the future food manufacturing.
研究领域:
食品科学
·
生物化学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Guocheng Ma,Huihui Zhang,Chengyu Wang,Haibo Wu,Ming Yuan,Xuejian Liu,Zhengren Huang
In this study, high-performance zirconium carbide (ZrC) ceramics prepared by gel-casting method were reported for the first time. A water-based slurry with 40 vol% solids was prepared using TMAH and PVP as dispersants, and the resulting green body had a flexural strength of 21.11 ± 1.84 MPa after curing, which was sufficient for machining. Dense ZrC ceramics (relative density >97 %) were obtained by sintering at 2000 °C under atmospheric pressure, and a 387 ± 23.21 MPa flexural strength and 15.48 ± 0.28 GPa hardness were achieved. This study offers a new strategy for preparing ZrC ceramics with complex structures.
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
Advanced Optical Materials
·
2024
·
IF 8
Moushira. A. Mohamed,Mohamed. A. Ali,Guo Shaorun,Xiaofeng Liu,Jianrong Qiu
Phosphor-in-silica glass (PiSG) composite is an excellent candidate for highly stable and efficient color converter in high power white light emitting diodes (wLEDs). However, the high-throughput fabrication of PiSG with different shapes is still challenging for current techniques. Here this study reports the manufacture of transparent PiSG based on YAG:Ce (Y 3 Al 5 O 12 :Ce 3+ ) using injection molding (IM) technique. In this approach, different shapes of centimeter-sized YAG:Ce-PiSG pieces are fabricated by using IM of a YAG:Ce/amorphous silica nanoparticles/thermoplastic polymer composite at low temperatures (@ 150 °C) which afterward are debound (@ 600 °C) and densified (@ 1150 °C). Interestingly, the molding time to produce YAG:Ce/silica/polymer green parts is 5 s per piece, implying the capability for high-throughput production of YAG:Ce-PiSG. Furthermore, the as-fabricated YAG:Ce-PiSG exhibits high luminescence efficiency (>91%) and high chemical/thermal stabilities. Accordingly, high power wLEDs (10 W) are fabricated using the YAG:Ce-PiSG which demonstrates high luminous efficiency of 144 lm W −1 at 50 mA, closing to that of the wLEDs fabricated by expensive YAG:Ce ceramic plate (i.e., 149 lm W −1 @ 50 mA). The work provides a facile and universal approach for industry-scale production of PiSG that can be promising for various photonic applications.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 132
·期 5
·
IF 1.64
Meng Su,Jianqiang Chen,Zhenhong Pan,Xiaobao Li,Anqi Xu,Jianguo Hong
The objectives of this study were to prepare injection-moulded wood-based plastics and to characterize their mechanical properties. Injection-moulded wood-based plastics with satisfactory flexural (65.7 MPa) and tensile strengths (30.1 MPa) were successfully obtained through a simple reaction of mulberry branch meal with phthalic anhydride (PA) in 1-methylimidazole under mild condition. The X- ray diffraction results indicated complete disruption of the crystallinity of cellulose because the pattern obtained for esterified fiber was almost a straight line without any peaks. The peaks in the Fourier transform infrared spectroscopy spectra (1738 and 748 cm −1 ) and NMR spectra (173.3 and 133.5 ppm) indicated the attachment of 0-carboxybenzoyl groups onto the wood fibers via ester bonds. The differential scanning calorimetry curves showed that the glass transition temperature decreased with increasing weight percentage gain (WPG). The derivative thermogravimetric analysis curves indicated that esterified wood fiber was less thermally stable than the untreated fiber and that the component tends to be homogeneous with increasing WPG. Scanning electron microscope revealed that the fractured surfaces of most samples were smooth and uniform but that high temperature and less PA dosage could lead to the appearance of holes and cracks. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41376.
研究领域:
材料科学
·
化学工程
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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）