Journal of Environmental Sciences
·
2020
·
IF 4.302
Yonghao Wang,Wenqi Wei,Yuzhi Lin,Mian Zhang,Yongjing Wang,Minghua Liu
In this work, magnesium silicate-based sulfonated polystyrene sphere composites (SPS/MgSi) were synthesized by one-step (SMD1) and two-step (SMD2) methods. For SMD1, MgSi particles were densely assembled on the surface of SPS, assisted by complexation between Fe 3+ and hydroxyl phenol. For SMD2, SPS/SiO 2 was firstly obtained by the same method as SMD1, and then SPS/SiO 2 was transformed directly to SPS/MgSi under hydrothermal conditions. Therefore, MgSi obtained by the two-step method had an interwoven structure. Compared to SPS, MgSi and SMD1, SMD2 presented a larger specific surface area and more negative surface charges. Therefore, SMD2 showed superior adsorption performance toward CIP with concentrations of 5, 10 and 50 mg/L, and for 50 mg/L, the equilibrium adsorption capacity could reach 329.7 mg/g. The adsorption process is fast and can be described by the pseudo-second-order kinetic model. The relationship between pH value and Zeta potential demonstrated that electrostatic interaction dominated the adsorption process. In addition, competitive adsorption showed that the effect of Na + was negligible but the effect of Ca 2+ was dependent on its concentration. Humid acid (HA) could slightly promote the absorption of CIP by SMD2. After five rounds of adsorption-desorption, the equilibrium adsorption capacity of SMD2 still remained at 288.6 mg/L for 50 mg/L CIP. Notably, SMD2 presented likewise superior adsorption capacity for CIP with concentrations of 10 and 50 mg/L in Minjiang source water. All the results indicated that this synthesis method is universal and that SMD2 has potential as an adsorbent for CIP removal from aquatic environments.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Siyue Wei,Xue Chen,Guangzhi Dong,Laijun Liu,Qi Zhang,Biaolin Peng
Ferroelectric ceramic with a large electrocaloric ( EC ) effect at a very low electric field is very attractive in the next solid state refrigeration technology. In this work, two Pb(Sc 0.25 In 0.25 Nb 0.25 Ta 0.25 )O 3 (PSINT) medium-entropy ceramics were successfully synthesized by a spark plasma sintering (SPS) technology, including one-step-SPS processed and two-step-SPS processed samples. A large EC effect (△ T ∼ 0.85 K) with a high EC strength (△ T /△ E ∼ 0.021 K cm/kV) around room temperature are obtained at a very low electric field (∼40 kV/cm) in the two-step-SPS processed sample. Moreover, the working temperature range is very broad (∼120 K), which can be responsible for the high relaxation degree of the dielectric peak. It can be believed that the PSINT medium-entropy ceramics can be promising candidates for application in the next-generation EC cooling devices.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
TISSUE & CELL
·
2020
·
IF 1.837
Biao Hu,Zeng-Dong Meng,Yu-Qin Zhang,Li-Yuan Ye,Cheng-Jian Wang,Wei-Chun Guo
Background Ideal bone defect repair scaffolds should be biodegradable, biocompatible, bioactive, porous, and provide adequate mechanical support. However, it is challenging to fabricate such an ideal bone repair scaffold. Previously, we showed that 5 wt.% strontium-doped hydroxyapatite (Sr-HA) scaffolds prepared by spark plasma sintering (SPS) technology exhibited good biocompatibility. Moreover, unlike pure hydroxyapatite (HA) scaffolds, HA scaffolds containing strontium (Sr) exhibited superior bioactivity, higher proliferation rate of BMSCs and MG-63 osteoblast cells, as well as enhanced BMSCs differentiation. Methods In this study, we prepared pure HA scaffolds and 5 wt.% strontium containing Sr-HA scaffolds by SPS technology without adhesive, ammonium bicarbonate as pore former. Subsequently, scanning electron microscope (SEM) and X-Ray diffraction (XRD) were used to characterize the properties of Sr-HA and HA scaffolds. The ability of the scaffolds to repair bone defects was evaluated using a critical-sized rabbit tibia-bone defect rabbit model. Thirty 3-month-old New Zealand white rabbits were randomly divided into three groups (blank control group, Sr-HA scaffolds implanted group and HA scaffolds implanted group) with 10 rabbits in each group. These rabbits are sacrificed after 8 weeks and 16 weeks of surgery, and the repair effects of each scaffold were evaluated with X-ray, micro-CT, and HE staining. The three-point bending test was employed to assess the mechanical property of repaired bones. Results XRD pattern indicated that Sr-HA and HA scaffolds possess a similar crystal structure after sintering, and that incorporation of strontium did not form impure phase. SEM showed that the porosity of Sr-HA and HA scaffolds was about 40 %. Universal Testing Machine tests showed that Sr-HA scaffolds had better compressive strength than HA scaffolds. Bone defect was obvious, and the fibrous tissue was formed in the bone defects of rabbits in the blank control group after 8 weeks of surgery. Sr-HA and HA scaffolds enhanced osteointegration of the host bone, and extensive woven bone was formed on the surface of the Sr-HA scaffolds. After 16 weeks, the bone strump became blunt and a small amount of callus was formed in the blank control group. Comparatively, the scaffolds were substantially degraded in the Sr-HA scaffolds implanted group while scaffolds shadows still were observed in the HA implanted group. Bone remodeling and cavity recanalization were completely developed in the Sr-HA scaffolds group. The compressive strength of repaired bone in the Sr-HA scaffolds implantation group was higher than that of HA scaffolds implantation group after 8 weeks and 16 weeks of surgery. Conclusions Our results show that the Sr-HA composite scaffolds can effectively repair bone defects and have good biodegradable properties.
研究领域:
生物材料学
·
骨组织工程
·
生物医学工程
·
再生医学
·
生物力学
·
口腔颌面外科
·
纳米医学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 2
·707-717
·
IF 4.5
Sui Yudong,Yuan Yanru,Tan Pan,Jiang Yehua,Han Lina
This paper presents the experimental investigation of the effect of Nb 2 O 5 content on the phase composition, microstructure, and physical and mechanical performance of the zirconia-toughened alumina (ZTA) ceramics, aimed to optimize the additional amount of Nb 2 O 5 , refine the ceramic grains, and improve the densification, hardness and fracture toughness. ZTA ceramics with various Nb 2 O 5 contents were prepared using the spark plasma sintering method. The addition of trace amounts of Nb 2 O 5 did not produce a new Nb-rich phase; the Nb atoms were dissolved in the ZrO 2 grains. The addition of trace amounts of Nb 2 O 5 led to grain refinement and an increase in density, but the addition of excessive Nb 2 O 5 resulted in grain growth and a decrease in relative density. Furthermore, the addition of Nb 2 O 5 promoted uniformity of the microstructure. The sample with 0.25 wt.% Nb 2 O 5 had the maximum Vickers hardness and indentation fracture toughness, which were 1228.40 HV and 9.17 MPa √m, respectively. Mechanical properties of the composite mainly depended on the grain size, which was influenced to some extent by the relative density.
研究领域:
材料科学
·
无机非金属材料
·
陶瓷学
·
结构陶瓷
·
粉末冶金
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Qianqian Ye,Kai Chen,Xiaocui Yang,Kaijun Xiao,Yi Shen
Although collagen peptides have been proved to possess wide applications in functional foods, cosmetics, medical materials and pharmaceuticals, the production of collagen peptides are deeply affected by proteases and substrate. In this study, the scalable-synthesis sulfonated polystyrene (SPS) nanospheres were utilized as accessible supports for efficient subtilisin immobilization. Detailed characterizations through SEM-EDS, TEM, TGA and FT-IR confirmed the undamaged formation of the SPS-subtilisin. Owing to the moderate hydrophobic effect and electrostatic interaction, the SPS-subtilisin could achieve 397.15 mg/g enzyme loading and 77.3% activity recovery. The tilapia skin collagen, as a resource-rich raw material, was hydrolyzed by the prepared immobilized subtilisin. The antioxidant activity of the attained peptides was verified. With the mass spectrometry and molecular docking analysis of product peptides sequences, representative peptides were synthesized and their anti-oxidation capacity and mechanism were affirmed, which further verified the undiminished catalytic ability of immobilized subtilisin.
研究领域:
生物化学
·
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Qingguo Chen,Xiaofeng Zhao,Yuancheng Teng,Weipeng Wang,Hang Liu,Kuibao Zhang,Junjie Wen,Zhengjun Zhang
LnPO 4 ·nH 2 O rhabdophane/monazite is an important actinide-bearing material in the back end of the nuclear fuel cycle. In this work, using Nd 3+ to simulate trivalent actinides, Ce 0.5 Nd 0.5 PO 4 ·0.667H 2 O rhabdophane was synthesized by the wet-chemistry method in 90 °C and pH = 1 solution. The sintering behavior of associated Ce 0.5 Nd 0.5 PO 4 monazite ceramics was investigated by pressureless sintering and spark plasma sintering (SPS), along with appraising their chemical stability. The results reveal that Ce 3+ is successfully replaced by Nd 3+ in the rhabdophane lattice, and rhabdophane can transform to monazite with a temperature over 750 °C. SPS can compact the ceramic sample at a lower temperature compared to pressureless sintering even if the grain size is smaller. Adding a pre-sintering process of 900 °C before SPS and pressureless sintering will further improve the density and Vickers hardness of ceramics. For the chemical stability of Ce 0.5 Nd 0.5 PO 4 monazite ceramics, Ce is more likely to be leached compared to Nd, and the ceramics prepared by SPS with a pre-sintering process have the lowest normalized leaching rates, associated with the values of 2.03 × 10 −5 g·m −2· d −1 and 0.75 × 10 −5 g·m −2 ·d −1 for Ce and Nd, respectively.
研究领域:
材料科学
·
核燃料循环
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Xiao-Hui Yang,Guo-Hua Zhang
The preparation of dense single-phase boride ceramics has always been a challenge. In this paper, single-phase W 2 B 5 ceramic with excellent performance was successfully prepared using W 2 B 5 powder and SPS-HF technology. Under the sintering condition of 1800 °C and 50 MPa, a nearly dense W 2 B 5 ceramic material with excellent mechanical properties was obtained. The relative density of the as-sintered W 2 B 5 ceramic achieved 96.72 % without any sintering additive. Additionally, the Vickers hardness , fracture toughness as well as bending strength were 30 GPa (9.8 N), 5.39 MPa·m 1/2 and 522.7 MPa, respectively. The outstanding hardness and bending strength of W 2 B 5 ceramic could be attributed to its monophase W 2 B 5 structure and high densification degree. The primary fracture mode of W 2 B 5 ceramic was transgranular fracture , and the toughening mechanisms included crack deflection, crack bridging, and crack branching.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Ao Li,Renkai Chang,Zhidong Zhang,Jie Tang,Qipeng Liu,Bing Liu,Mengdong Ma,Qisong Li,Xiaozhe Cheng,Xiaoyan Guan,Qian Zhang,Yunchao Mu,Quan Huang
Silicon carbide (SiC) is a key structural ceramic renowned for its excellent comprehensive properties. However, its inherent brittleness often limits its service lifetime and reliability in high-wear applications. To address this issue, the present work combined the polymer-derived ceramic (PDC) route with spark plasma sintering (SPS), aiming to achieve additive-free densification of SiC-WC composites. Composite powders were prepared from liquid polycarbosilane (PCS) and nano-sized WC, and the resulting ceramics were systematically characterized. With increasing WC content, the composites exhibited synergistic improvements in hardness, fracture toughness, and tribological properties. The sample containing 50 wt% WC (SW-50) achieved a balanced set of properties, including a Vickers hardness of 22.7 ± 0.81 GPa, a fracture toughness of 6.0 ± 0.26 MPa m 1/2 , and a wear rate of 8.5 × 10 −7 mm 3 N −1 m −1 . These values represented improvements of approximately 11%, 46%, and 78%, respectively, relative to the WC-free sample (SW-0). All these findings demonstrates that the PDC-SPS process holds promising for achieving synergistic improvements in composite ceramics via microstructural regulation. This work provides a new and practical strategy for fabricating high-performance SiC-WC composites without sintering additives.
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2026
·
IF 7.3
Yong Wei,Ling-Zi Tao,Hui-Ling Yang,Xiao-Yun Sun,Cheng-Yang Wang,Lai-Ma Luo
To address the high brittleness and insufficient toughness of Titanium–Zirconium–Molybdenum (TZM) composites, this study successfully prepared a TZM-0.5 wt% Y 2 O 3 composite with high ductility using spark plasma sintering (SPS), and systematically investigated the influence of sintering temperature on its tensile properties and fracture mechanism. At 1900 °C, the composite grains are refined to 3.75 μm, the relative density reaches 99.2 %, and the hardness is 214.2 HV 0.2 . Its room-temperature yield strength (YS), ultimate tensile strength (UTS), and elongation (EL) reach 548 MPa, 631 MPa, and 18 % respectively, with a strength-ductility product (PSE) of 11.4 GPa·%, exhibiting a ductile fracture feature dominated by microporous aggregation. Compared with the samples sintered at 1800 °C, those sintered at 1900 °C have finer and more uniform grains, as well as higher density. However, the mechanical properties of the samples sintered at 2000 °C show a slight decrease, which is caused by the over-sintering behavior. The composite sintered at 1900 °C exhibits the optimal matching between microstructure and mechanical properties. Its excellent performance stems from the synergistic effect of dispersion strengthening by nanoscale second phase particles within grains and grain refinement strengthening.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yao Yang,Jianqiang Bi,Kangning Sun,Linjing Qiao,Yi Liu,Yonghan Li,Hongyi Wang,Yanjie Liang,Mengmeng Shang
The composition and synthesis approach of high entropy ceramics have significant influences on their microstructures and mechanical properties. A new (Hf 0.2 Zr 0.2 Ta 0.2 V 0.2 Nb 0.2 )B 2 high entropy diboride ceramic with excellent mechanical properties was successfully prepared by spark plasma sintering (SPS) at a relatively “low temperature” (1800 °C) in this work. The effects of two mixing strategies, grinding and ball milling, on the solid solubility of the calcined powders were studied. Furthermore, the effects of these two mixing strategies on the phase and morphology of the calcined powders and the mechanical properties of the SPS sintered ceramics were analyzed. Experimental results indicated that, compared with a single solid solution phase within the high entropy boride powders obtained by ball milling, incomplete solid-solution presented in the high entropy boride powders obtained using grinding treatment. It promoted the solid-state diffusion and in-situ reaction of the diborides in the ceramics during the sintering process, thereby improving the densification and the hardness of the high entropy diboride ceramics. By grinding treatment, (Hf 0.2 Zr 0.2 Ta 0.2 V 0.2 Nb 0.2 )B 2 high entropy ceramic with a relative density of 94% and a hardness of up to 25.34 ± 1.5 GPa at an indentation load of 9.8 N was obtained at 1800 °C. This work not only expanded the family of high-entropy diboride ceramics but also proved the advantage of grinding treatment in preparation of high entropy diboride ceramics.
研究领域:
材料科学
·
陶瓷
·
高熵合金
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2023
·
IF 6.4
Shu-Xin Yan,Guo-Dong Sun,Jian-Ping Xu,Jia Xu,Fu-Fa Wu
Simultaneous achieving the second-phase particle strengthening, high density, and fine grain is a great difficulty for designing and preparing Mo alloys . In this study, the effects of γ-Al 2 O 3 and Y 2 O 3 nanoparticles on the microstructures and properties of Mo composites prepared via spark plasma sintering (SPS) were systematically investigated. It was found that for pure Mo and Mo–Y 2 O 3 powders, Mo compact with both high density and fine grain size can't be achieved. However, Mo-Al 2 O 3 composite with both a relatively high density (98%) and a fine grain size (1.67 μm) was synthesized successfully. The small γ-Al 2 O 3 particles transformed into larger κ-Al 2 O 3 particles by obvious grain boundary migration and grain growth in the sintering process, which effectively pinned the migration of Mo grain boundary with few effects on the surface atom diffusion of Mo. Moreover, there was a crystallographic orientation relationship between the κ-Al 2 O 3 particles and Mo matrix (Mo (110)//Al 2 O 3 ( 13 4 ‾ 1 )). Ultrafine Mo composite containing dispersed Al 2 O 3 particles with stable boundary adhesion can efficiently hinder dislocation movement and crack propagation , resulting in the obvious enhancements of bending strength , hardness and compressive yield strength.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 10
·6301-6316
·
IF 3.9
Xiao-Tong Jia,Zhao-Hui Zhang,Tian-Hao Xu,Luo-Jin Liu,Yuan-Hao Sun,Xian-Yu Li,Qiang Wang,Zhao-Hu Jia,Yang-Yu He,Xing-Wang Cheng
Aluminum oxynitride (AlON) ceramics doped with different sintering aids were synthesized by spark plasma sintering process. The microstructures, mechanical, and optical properties of the ceramics were investigated. The results indicate that the optimal amount of sintering aids is 0.06 wt% La 2 O 3 + 0.16 wt% Y 2 O 3 + 0.30 wt% MgO. The addition of La 3+ and Mg 2+ decreases the rate of grain boundary migration in ceramics, promotes pore elimination, and inhibits grain growth. The addition of Y 3+ facilitates liquid-phase sintering of AlON ceramics. Moreover, the addition of Mg 2+ effectively promotes twin formation in the ceramics, which hinders crack propagation and dislocation motion when the ceramics are loaded. Hence, the AlON ceramic doped with 0.06 wt% La 2 O 3 + 0.16 wt% Y 2 O 3 + 0.30 wt% MgO exhibits a relative density of 99.95%, an average grain size of 9.42 μm, and a twin boundary content of 10.3%, which contributes to its excellent mechanical and optical properties.
研究领域:
材料科学
·
陶瓷
·
烧结技术
✓ 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）