CERAMICS INTERNATIONAL
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2021
·
IF 4.527
Qihuang Deng,Wei Xiong,Bingshuang Mao,Maolin Bo,Yefeng Feng
Increasing the dielectric constant of polymer/sulfide ceramic composites by using wide-bandgap semiconducting sulfide ceramic fillers like ZnS is difficult because of their low interface polarization. To increase the dielectric constant, in this study, ternary polymer-based composite films were designed and fabricated using a hybrid filler consisting of shell-like ZnS particles and core-like V 2 C MXene particles. First, V 2 C MXene with a multi-layered structure was synthesized from the simplest raw materials followed by the in-situ hydrothermal growth of ZnS particles around the V 2 C particles. Then, binary polymer/ZnS and ternary polymer/V 2 C–ZnS composites were fabricated, and their dielectric, conductive, and electrical breakdown properties were investigated. Finally, the effect of interfacial bonding between the V 2 C and ZnS phases was investigated by density functional theory calculations, and the contribution of V 2 C/ZnS interfacial bonding to the higher dielectric constant of the ternary composites than that of the binary composites was explained. The ternary composites exhibited balanced electrical properties suitable for energy storage applications. The ternary composite with 10 wt% hybrid filler loading exhibited a high dielectric constant of ~52, a low dielectric loss of ~0.11 at 100 Hz, and a high electrical breakdown strength of ~202 MV m −1 . This study paves the way for the facile fabrication of high-performance composite dielectrics for application in advanced capacitors.
研究领域:
材料科学
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电气工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 12
·2048
·
IF 3.164
Qinrui Zhu,Dagang Li
Interface optimization in preparing natural fiber based biocomposite becomes a key factor that determines overall properties, especially mechanical performance. The solution for upgrading interfacial adhesion stemmed from polar fiber and nonpolar polymer remains unclear. Here, a kind of pulp fiber/acrylonitrile-butadiene-styrene (ABS) composite with content ratio of 1:1 was fabricated by functionalizing the cellulose fiber to coordinate interaction between fiber and ABS. With addition of 5 wt % polyacrylamide (PAM) there existed an interlinked three-element structure in composite. Three types of treatment to cellulose fiber, including alkali immersion, pivaloyl chloride grafting for 10 h and 20 h were conducted. Pulp fiber that was treated with alkali for one hour, followed by pivaloyl chloride reaction for ten hours, proved to be effective for interfacial adhesion. X-ray Photoelectron Spectroscopy (XPS) analysis reveals 21.9% of carbonyl and 12.1% of ester function in this fiber, which corresponds to oxidation and grafting. For its composite SEM picture displays that most of cellulose fiber are rooted in ABS and evident traces of tearing or fracture can be observed after tension test. DMA test indicates that this modified pulp fiber/ABS composite exhibits great compatibility, because of combined loss modulus peak ranging from 80 °C to 100 °C. Moreover, the well miscible composite has a tensile strength of 58.1 MPa and elastic modulus of 2515 MPa, increasing by nearly 50% and 60% from those of pure ABS, respectively.Keywords:ABS;modification;interfacial adhesion;compatibility;interlinked structure
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
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IF 3.779
X.Q. Liu,C.J. Li,J.H. Yi,K.G. Prashanth,N. Chawake,J.M. Tao,X. You,Y.C. Liu,J. Eckert
Achieving effective load transfer at the interface between carbon nanotubes (CNTs) and aluminum (Al) is a crucial issue for fabricating high-performance CNTs reinforced Al matrix (CNT/Al) composites. In this work, CNT/Al composites with different Ti additions and the compared materials were prepared by powder metallurgy . Micro-sized Ti particles in which CNTs are well-dispersed firstly circumvent the difficulty of CNT dispersion, and subsequently act as nucleation site for sandwiched TiAl 3 layers that lock the dispersed CNTs in place and improve the CNT-Al interface bonding. Additionally, Ti addition not only allows modification of the dispersed CNTs but also enhances the strength of the composites by enhancing the load-bearing capacity of the CNTs through in situ formation of nano-sized titanium carbide (TiC). This work provides a new approach to improve the load transfer efficiency of CNTs by strengthening the interface bonding for fabricating high strength CNT/Al composites.
研究领域:
材料科学
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力学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2019
·
IF 5.77
Yuxuan Wang,Jie Sheng,Lidong Wang,Yu Zhao,Miao Wang,Ziyue Yang,Han Xue,Weidong Fei
Ferroelectric ceramic with negative thermal expansion during the phase transformation from T-phase to C-phase can be used as reinforcement to obtain low thermal expansion metal matrix composites. Interface bonding plays an important role in determining thermal and mechanical properties of the composites. Here, we designed and applied Cu 2 O coating on the surface of Sr 0.2 Ba 0.8 TiO 3 (SBT) particles by heterogeneous precipitation method, and subsequently obtained low thermal expansion Cu 2 O/SBT/Cu composites with excellent mechanical properties. It was found that the semi-coherent relationship can be formed in both Cu/Cu 2 O and Cu 2 O/SBT interfaces, which benefits the reduction of composites thermal expansion. The relationship among Cu 2 O content, SBT phase transformation and thermal expansion has been discussed. Compared with SBT/Cu composite, the average coefficient of thermal expansion of 6%Cu 2 O/SBT/Cu composite can be reduced from 12.97 × 10 −6 °C −1 to 11.44 × 10 −6 °C −1 . Moreover, with the introduction of Cu 2 O coating, the compressive strength of the composite can reach up to 722.7 MPa. This work provides a promising method to improve the thermal expansion and mechanical property of ferroelectric reinforcement metal matrix composites.
研究领域:
材料科学
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复合材料
✓ 已验证
DOI
高影响因子
Polymers
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2019
·Vol. 11
·期 11
·1892
·
IF 3.164
Luhao Wang,Bin Luo,Danni Wu,Yi Liu,Li Li,Hongguang Liu
Intelligent responsive materials have become one of the most exciting fields in the research of new materials in the past few decades due to their practical and potential applications in aerospace, biomedicine, textile, electronics, and other relative fields. Here, a novel thermal-responsive biomimetic shape memory wood composite is fabricated utilizing polycaprolactone-based (PCL) shape-memory polymer to modify treated-wood. The shape memory wood inherits visual characteristics and the unique three-dimension structure of natural wood that endows the shape memory wood (SMW) with outstanding tensile strength (10.68 MPa) at room temperature. In terms of shape memory performance, the shape recovery ratio is affected by multiple factors including environment temperature, first figuration angle, cycle times, and shows different variation tendency, respectively. Compared with shape recovery ratio, the shape fixity ratio (96%) is relatively high and stable. This study supplies more possibilities for the functional applications of wood, such as biomimetic architecture, self-healing wood veneering, and intelligent furniture.Keywords:shape memory wood;thermal-response;biomimetic materials;interface bonding
研究领域:
材料科学
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仿生学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2018
·Vol. 6
·期 23
·3859-3864
·
IF 4.776
Zhitong Zhao,Weiwei Gao,Hao Bai
Hydrogel coating has been attractive to improve titanium implants’ compatibility with biological surroundings and their performance in clinic. Herein, a CaCO3 layer is fabricated at the interface of hydrogel–titanium to achieve strong interfacial bonding. This strategy does not require complicated surface modifications and has good prospects in the field of biomedical applications.
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
Nuclear Materials and Energy
·
2023
·
IF 2.6
Xin Chen,Yichao Gong,Kun Kang,Yuefei Wang,Jiarui Li,Zhaokun Li,Tao Wu,Guojun Zhang
Li 2 TiO 3 /Li 4 SiO 4 ceramics have been regarded as promising tritium breeders due to their numerous merits. In this work, chitosan was employed as an effective binder to provide adhesion of Li 2 TiO 3 particles to Li 4 SiO 4 particles, resulting in Li 2 TiO 3 /Li 4 SiO 4 ceramics with improved performance. Chitosan could be removed during the sintering process and had little influence on the phase composition. The resulting Li 2 TiO 3 /Li 4 SiO 4 ceramics had higher density (92.5%T.D.), greater crushing loads (115.2 ± 20.8 N) and superior thermal properties (3.61 W/m∙K) when compared to the samples prepared without chitosan. SEM analyses displayed a dual-scale structure and the inter- and trans -granular fracture mode. Thermal cycling tests revealed that the phase composition was stable but the crushing load fell slightly. The crushing load remained at 92.4 ± 17.1 N after 12 cycles. Overall, chitosan plays an important role in the amelioration of interface combination between Li 4 SiO 4 and Li 2 TiO 3 , and thus significantly improve density, crushing load and thermal conductivity of Li 2 TiO 3 /Li 4 SiO 4 .
研究领域:
材料科学
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核能工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2025
·
IF 6.2
Zhicheng Ding,Chenghao Zhang,Yang Liu,Chun Li,Xiaoqing Si,Zongjing He,Zhiquan Wang,Jian Cao
AlN metallization substrates hold broad application potential in the field of electronic packaging due to their high thermal conductivity and unique electrical insulation properties. The present work reports a method for preparing Ag coatings by directly pressing and sintering micro-Ag particles on the AlN surface in air without additional brazing fillers or pre-treatment. The in-situ formation of the Ag-containing Al 2 O 3 interlayer (~200 nm) is critical for the interfacial bonding at the AlN/Ag interface. The diffusion of Ag particles into Al 2 O 3 not only enhances the interfacial adhesion of the Ag layer but also improves thermal conductivity. Notably, AlN/Ag exhibits a high bonding strength of 67.6 MPa with an excellent thermal conductivity of 178.7 W·m -1 ·K -1 at 950°C. The Ag layer demonstrates superior surface hardness and electrical conductivity at 900°C due to its high density and low grain boundary density.
研究领域:
材料科学
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电子封装技术
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产品关联
DOI
高影响因子
Energetic Materials Frontiers
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2023
·
IF 0
Shao-cong Deng,Ya-jun Luo,Yan-zhou Qu,Xin-ru Yang,Zhi-jian Yang,Xu Zhao,Yi-ding Liu,Fu-de Nie
To improve the mechanical properties of 2,4,6-trinitrobenzene-1,3,5-triamine (TATB)-based polymer bonded explosives (PBXs), four kinds of polythiourea binders, namely the polyetherthiourea (P1), aliphatic polythiourea (P2), aromatic polythiourea (P3) and silane polythiourea (P4), were prepared and used in the PBXs. These four polythioureas were synthesized via the copolymerization of carbon disulfide (CS 2 ) and diamines with various structures under mild conditions. They were then characterized using nuclear magnetic resonance (NMR) and Fourier-transform infrared spectroscopy (FTIR). The interfacial binding energy between polythioureas and TATB was calculated via molecular dynamics simulations. The tensile and compression mechanical properties of various PBXs (PBX-P n , n = 1–4) were studied through Brazilian and compression tests and were then compared with those of the PBX with a conventional fluoro polymer binder (PBX-FP). The results show that the PBX-P1 possessed the strongest interfacial interaction energy and the best mechanical properties among all the prepared PBXs. Its Brazilian strength and strain was 11.0 MPa and 0.56%, which was 89% and 256% higher than those of the PBX-FP with the same binder proportion, respectively. Furthermore, PBX-P1 showed excellent compression mechanical properties, with a compression strength of 40.7 MPa and a compression strain of 3.53%. Moreover, its Brazilian and compression fracture energy was 600% and 101% higher than those of PBX-FP, respectively, which was beneficial for improving the PBX stability. The results of this study provide a new idea for designing TATB-based PBX with improved mechanical properties using polyetherthiourea binders.
研究领域:
材料科学
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爆炸物工程
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高分子化学
✓ 已验证
DOI
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2019
·
IF 4.029
Limeng Liu,Jozef Vleugels,Shuigen Huang,Jie Wei,Yujin Wang
TaC ceramics with 0-0.237 wt% B addition were prepared by hot pressing. The effect of B addition on the phase constitution, interfacial chemistry/bonding and mechanical properties of the TaC ceramics were investigated. Upon B addition, the elimination of O impurity and segregation of B at grain boundaries were evidenced, accompanied by an increase in bonding strength of the TaC grains, to result in a fracture mode change from intergranular to transgranular and a reduced fracture toughness. Addition of excessive B resulted in the formation of TaB 2 and C within TaC ceramics. Further, TaC-TaB 2 -SiC composites were prepared by Si addition. Coherent bonding between TaB 2 and TaC was preserved in the TaC-TaB 2 -SiC composites, and residual stresses due to thermal expansion mismatch of the different phases increased flexural strength and fracture toughness of the composites.
研究领域:
材料科学
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工程学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2020
·Vol. 60
·期 4
·710-716
·
IF 1.917
Hui Fang,Denghui Li,Fangjuan Wu,Xiangfang Peng,Anlin Chen,Lingjie Zhang,Sheng Chen
Polyamide 6/boron nitride (PA6/BN) composites were synthesized via anionic ring-opening polymerization using ε-caprolactam as the monomer and functional boron nitride (f-BN) as the thermal conductive filler. Besides the homopolymerized PA6, some PA6 molecule chains would grow from the f-BN sheets through the “grafting from” strategy. Compared with unfunctional hexagonal BN (h-BN), the introduction of f-BN not only improved the dispersion of f-BN in the matrix but also enhanced the interface bonding between f-BN and PA6. The homogeneous dispersion of f-BN in the PA6/f-BN composite favored the formation of the continuous thermal conductive paths or network at a low f-BN loading, and the good interface bonding reduced the phonon scattering in the interface, which improved the thermal conductivity (TC) of the PA6/f-BN composite by 66.0% compared with that of the pure PA6, when only 5 wt% f-BN was added. In contrast, with the same content of unfunctional h-BN loading, the TC of the corresponding composite merely improved by 29.7%. Moreover, Young's modulus and yield strength of PA6/f-BN composites had increased obviously with the introduction of f-BN, whereas those of PA6/h-BN composites showed small fluctuation with the same contents of BN. POLYM. ENG. SCI., 60:710–716, 2020. © 2020 Society of Plastics Engineers
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Research
·
2022
·Vol. 26
·期 1
·
IF 15.863
Pei Feng,Jiye Jia,Shuping Peng,Yang Shuai,Hao Pan,Xinna Bai,Cijun Shuai
Background The reinforcement effect of fiber-reinforced polymer composites is usually limited because of the poor interfacial interaction between fiber and polymer, though fiber reinforcement is regarded as an effective method to enhance the mechanical properties of polymer. Methods In this study, nano-SiO 2 particles grafted by 3-Glycidoxypropyltrimethoxysilane (KH560) were introduced onto the surface of 3-Aminopropyltriethoxysilane (KH550) modified carbon fiber (CF) by a self-assembly strategy to improve the interfacial bonding between CF and biopolymer poly (lactic acid) (PLLA). Results The results indicated that PLLA chains preferred to anchor at the surface of nano-SiO 2 particles and then formed high order crystalline structures. Subsequently, PLLA spherulites could epitaxially grow on the surface of functionalized CF, forming a transcrystalline structure at the CF/PLLA interface. Meanwhile, the nano-SiO 2 particles were fixed in the transcrystalline structure, which induced a stronger mechanical locking effect between CF and PLLA matrix. The results of tensile experiments indicated that the PLLA/CF-SiO 2 scaffold with a ratio of CF to SiO 2 of 9:3 possessed the optimal strength and modulus of 10.11 MPa and 1.18 GPa, respectively. In addition, in vitro tests including cell adhesion and fluorescence indicated that the scaffold had no toxicity and could provide a suitable microenvironment for the growth and proliferation of cell. Conclusion In short, the PLLA/CF-SiO 2 scaffold with good mechanical properties and cytocompatibility had great potential in the application of bone tissue engineering.
研究领域:
材料科学
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生物医学工程
·
组织工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）