POLYMER COMPOSITES
·
2025
·
IF 4.7
Si Zhang,Zifan Wang,Chuanbo An,Nuoyi Wu,Xiaoxue Wang,Yun Chen
Carbon fiber reinforced polyimine (CF/PI) composites had promising applications due to their flame retardancy and ease of recyclability. However, the mechanical properties of CF/PI are generally insufficient, and optimizing the interface between carbon fiber (CF) fabrics and polyimine (PI) matrix could effectively solve this problem. The interfacial bonding between CF fabrics and the PI matrix was enhanced by a combination of CF fabrics pre-treatment and grafting with the silane coupling agent (APTMS). CF/PI laminates were prepared by the “pre-fabrication-lamination” method to optimize the production cycle. Interlaminar delamination failure of CF/PI laminates was analyzed using the cohesive element method. The experimental results showed that the combination of pre-treatment and grafted APTMS treatment increased the impact strength, flexural strength, and interlaminar shear strength (ILSS) of CF/PI laminates by 227.5%, 158.2%, and 259.8%, respectively. The simulation results showed excellent agreement with the experimental results. The scanning electron microscopy morphology of the fracture surface showed that delamination was the primary damage mechanism, which was consistent with the cohesive element simulation delamination. In this paper, a strategy for the optimization of the interface between CF fabrics and the PI matrix was proposed for the first time, and reliable numerical simulation results were provided. Highlights CF/PI laminates were produced by “pre-fabrication-lamination”. Enhanced CF/PI interface by CF fabrics pre-treatment and APTMS grafting. CF/PI laminates showed significant improvements in impact strength, flexural strength, and ILSS. Cohesive element method accurately predicts interlaminar delamination. The error between experimental and numerical simulation results was less than 5%.
研究领域:
材料科学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2018
·
IF 5.16
Renliang Ma,Weiwei Li,Momo Huang,Ming Feng,Xiaojing Liu
The attainment of both strength and toughness was crucial for polymer composites . However, compared with the long fiber composites, conventional short fiber composites showed the low strength and toughness, due to the more stress concentrations generated around the fiber ends . In this work, a new morphological short carbon fiber reinforcement was fabricated by electrodeposition , which presented like the dendritic structure. The enhanced strength and toughness were realized by incorporating the dendritic short carbon fibers into rigid polyurethane (RPU) matrix. The tensile strength , impact strength and interfacial shear strength (ILSS) of the dendritic short carbon fibers/RPU composites were increased by 41.3%, 81.2% and 28.9%, respectively compared with pure RPU. The composites also exhibited the excellent dynamic mechanical properties . The satisfactory performance was mainly attributed to the pinning effect by the dendritic structure.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Li Wang,Ning Wang,Longxuan Yan,Yao Ma,Zhaofa Zhang,Sen Shi,Lanjie Niu,Xiangyang Li,Bingheng Lu
Electromagnetic wave (EMW)-absorbing ceramic metamaterials without doping absorbers were prepared by direct pyrolysis of polymer-derived SiBCN ceramics (PDC-SiBCN). The pyrolytic behavior of the ceramics, the effect of the pyrolysis temperature on the mechanical strength , and the EMW absorption properties of the metamaterials are discussed in detail. The mechanism of the enhanced EMW absorption by the metamaterials was further analyzed. The results indicated that PDC-SiBCN demonstrated the optimum impedance matching and absorption performance at a pyrolysis temperature of 1500 °C. The metamaterial can effectively absorb the full X-band when its thickness is in the range of 4.3–5.7 mm. When the thickness was adjusted to 4.7 mm, the minimum reflection coefficient (RC) reached − 26.6 dB. In addition, the flexural strength of the metamaterial was 31.2 MPa, and the compressive strength was 96.9 MPa, which is 60 times higher than that of the solid structure. This study provides a feasible guide for the simple fabrication of lightweight, high-strength, and high-performance EMW-absorbing materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Yi-Ran Li,Ying-Ming Li,Wen-Juan Hu,Dan-Ping Zhu,Jose Hobson,Antonio Vázquez-López,De-Yi Wang
Epoxy resin (EP) is one kind of widely applicated thermosetting resin with excellent manufacturability, mechanical performance and chemical resistance, but its flammability seriously limited its widely application. In this work, the flame-retarding curing agent (BIPD) with was prepared by a simple one-step substitution reaction between benzimidazole (BI) and phenylphosphonyl dichloride (PD). When the mass fraction of BIPD is 10 %, the flexural strength and impact strength are 174.7 MPa and 14.9 KJ/m 2 , respectively, which are 15.5 % and 69 % higher than those of EP/BI 10 . The EP/BIPD 10 passed the UL-94 V-0 rating with a limiting oxygen index (LOI) reaching to 33 %. Meanwhile, the peak of heat release rate (PHRR) and total heat release rate (THR) of EP/BIPD 10 decreased by 50.2 % and 37.8 %, the total smoke production (TSP) and the mass percentage of residues increased by 10.4% and 204.1 % than that of EP/BI 10 in the cone calorimeter (CC) measurement, showing a jointly flame-retarding process in the condensed and gas phase. Furthermore, the results of Raman spectrum , the thermogravimetric infrared spectroscopy (TG-FTIR) and pyrolysis-gas chromatography/mass spectrometry (PY-GC/MS) confirmed the conclusion.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 6
·1347
·
IF 3.623
Moses Karakouzian,Visar Farhangi,Marzieh Ramezani Farani,Alireza Joshaghani,Mehdi Zadehmohamad,Mohammad Ahmadzadeh
Considering the remarkable characteristics of nanomaterials, previous research studies investigated the effects of incorporating different types of these materials on improving the concrete properties. However, further studies are required to evaluate the complementary hybridization and synergistic influence of nanomaterials. In this research, the combined effect of adding nano silica particles (NS) and multi-walled carbon nanotubes (MWCNT) on enhancing both the compressive and flexural strengths of the cement paste was investigated. Moreover, the morphology of the interface between cement paste and aggregates was studied by scanning electron microscopy (SEM). The mixtures were prepared using three different portions of MWCNT and NS. Electron microscopy images indicated a uniform distribution of nanoparticles in the cement matrix, enhanced hydration reactions, and increased density. Based on the experiments’ outcomes, the combined utilization of silica and carbon nanomaterials in the cement paste did not necessarily result in the maximum compressive and flexural strengths. Furthermore, it was observed that the use of higher percentages of pristine NS in the absence of MWCNT can lead to further enhancement of strength properties of the cement paste.Keywords:silica nanoparticles;carbon nanotube;compressive strength;flexural strength
研究领域:
土木工程
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Materials
·
2024
·Vol. 17
·期 14
·3410
·
IF 3.1
Yixuan He,Xiaohong Wang,Ning Ding,Hai Jiang,Wenzhong Lu
Isobam is widely used for fabricating ceramics through spontaneous gelation and has attracted considerable interest. However, the disadvantage of the Isobam system is the low gelation strength. The effects of suitable additives and the mechanism by which they effectively enhance the green body strength and the rheological behavior of an aluminum nitride (AlN) slurry with 50 vol% solid loading were investigated using polyethyleneimine (PEI), hydantoin epoxy resin, and trimethylolpropane triglycidyl ether (TMPGE). Results showed that the additives acted as both dispersants and cross-linkers in the AlN suspension using the Isobam gelling system. The flexural strength of the AlN green body increased by 42%, 204%, and 268% with the addition of 1 wt% PEI, 1 wt% hydantoin epoxy resin, and 0.5 wt% TMPGE, respectively. After sintering at 1700 °C, the AlN ceramic with 0.5 wt% TMPGE had flexural strength and thermal conductivity of 235 MPa and 166.44 W/(m·K), respectively, showing superior performance to the ceramics without additives.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Wenjing Wang,Qingyu Niu,Xiao Liu,Lingna Su,Jiahuan Zhang,Shuai Meng,Zhiqiang Li,Ying Zhang,Qingqing Xiong
Among stimuli-responsive soft materials, thermal responsive hydrogels are the most attractive one because temperature is the most easily regulated external stimuli. We here report a thermal responsive bilayer smart luminescent hydrogel actuator with tough mechanical strength and thermal reversible deformation behavior. The bilayer hydrogel is composed of Poly(N-isopropylacrylamide)-Laponite-Tb complex (PNIPAM-Lap-Tb·L 3 ) layer and Poly( N,N -dimethylacrylamide)-Laponite-Eu complex (PDMA-Lap-Eu·L 3 ) layer. Upon alternative heating and cooling, the PNIPAM-Lap-Tb·L 3 layer undergoes reversible shrink and expansion, while the PDMA-Lap-Eu·L 3 layer is not affected, leading to asymmetric deformation behavior. The luminescent intensity of the bilayer hydrogel was enhanced by heating, and the maximum bending angle was 371° in 15 min. By processing the bilayer hydrogel into complex 2D and 3D structure, we further demonstrate their great potential as smart soft actuators.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 20
·5126
·
IF 3.1
Ke-Ke Yu,Tai-Qi Zhao,Qi-Ling Luo,Yang Ping
Three-dimensional printed concrete (3DPC) is increasingly recognized in the construction industry for its high design flexibility and the elimination of conventional formwork. However, weak interlayer adhesion remains a significant challenge. The potential of recycled polyethylene terephthalate (PET) fibers for reinforcing 3DPC is being explored, driven by their environmental sustainability and economic advantages. However, there is an inadequate interfacial adhesion between these recycled fibers and the 3DPC matrix. This study investigated the use of dopamine modification to address this issue and enhance the interlayer adhesion of fiber-reinforced 3DPC. Recycled PET fibers were surface-modified using dopamine treatment, forming a polydopamine (PDA) film that improved surface roughness and hydrophilicity. Both unmodified and modified fibers were incorporated into 3DPC at various volume fractions (0.1%, 0.3%, 0.5%). The effects on interlayer adhesion strength, compressive strength, and flexural strength were systematically evaluated and compared. The results showed that the inclusion of 0.3 vol% dopamine-modified fibers resulted in a 22.5% increase in interlayer adhesion strength compared to the control group, and a 14.8% improvement over unmodified fibers at the same content. Additionally, the compressive strength and flexural strength of 3DPC with 0.3 vol% MPET fibers increased by 22.5% and 27.6%, respectively, compared to the control group. Microstructural analysis using SEM and XRD revealed that the dopamine modification significantly improved the interfacial adhesion between fibers and the concrete matrix, explaining the superior performance of modified fibers. This study demonstrates that recycled PET fibers modified with dopamine can effectively enhance the interlayer adhesion of 3DPC. The findings affirm that surface modification techniques can significantly elevate the utility of recycled PET fibers in 3DPC, contributing to the sustainable advancement of construction materials.
研究领域:
土木工程
·
材料科学
·
可持续建筑
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Fei Chen,Mingyong Jia,Yulong She,Yueqi Wu,Qiang Shen,Lianmeng Zhang
In this paper, aluminum nitride (AlN) and molybdenum (Mo) were used for fabrication of AlN/Mo functionally graded materials by spark plasma sintering (SPS). In order to study the influence of microstructure on mechanical properties in AlN/Mo FGMs, the FGMs with different composition exponent p value were analyzed by indentation and bending test . The results showed that the specimens with p < 1 exhibited a metal-rich graded structure comparing to specimens with p ≥ 1. The radial bending and shear strength of AlN/Mo FGMs reached maximum when p < 1, which are 369.78 MPa and 48.01 MPa respectively. Moreover, comparing with the porosity and the ceramic/metal interface, the distribution of the two components is the most important factor for improvement of bending and shear strength. The more the hard metal network content in the graded layer, the higher the bending and shear strength of AlN/Mo FGMs.
研究领域:
材料科学
·
机械工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Ji-Hao Zuo,Chao Wei,Peng Cheng,Xi Yan,Yan Chen,Wan-Zhong Lang
Permeability and mechanical strength normally present an opposite trend for separation membranes . There is a trade-off line of permeability vs. tensile strength for the prepared poly(vinylidene fluoride) (PVDF) membranes via thermally induced phase separation (TIPS) method. In this work, TIPS-prepared PVDF membranes were fabricated with water (PVDF T-water ) and air (PVDF T-air ) as quenching bath for comparatively studying. PVDF T-air membranes present larger average pore size, higher permeability and better mechanical strength than those of PVDF T-water membranes due to the lower cooling rate of air bath. It is wonderful that all PVDF T-air membranes can break though the trade-off line of permeability vs. tensile strength of TIPS-prepared PVDF membranes. The optimal membrane (M-A30) shows superior performance, such as ultrahigh water flux of 3275 L m −2 h −1 ·bar −1 and tensile strength of 5.7 MPa. Additionally, this research provides a feasible method to regulate the morphology, pore size and permeability of TIPS-prepared PVDF membranes.
研究领域:
材料科学
·
膜技术
·
聚合物工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Mengke Qiao,Xiangcheng Li,Pingan Chen,Yingli Zhu,Boquan Zhu
The effect of nano-zirconia addition on the microstructure and properties of corundum castables was studied using corundum, kyanite, alumina powder, gel powder, and nano-ZrO 2 as raw materials. The results showed that adding 1.2(wt)% nano-ZrO 2 could reduce the median pore diameter of the castables from 480 to 200 nm at 110 °C. After the castables were heated at 1100 °C, the cold modulus of rupture increased by 29.95%, to 24.71 MPa, and the cold compressive strength increased by 50.32%, to 116.37 MPa. The hot modulus of rupture increased by 114.95%, to 3.59 MPa after being treatment at 1500 °C, the high surface energy of nano-ZrO 2 can increase the interface energy and bonding strength between adjacent particles.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2016
·
IF 3.12
Shunli Liu,Mengmeng Kang,Imtiaz Hussain,Kewen Li,Fang Yao,Guodong Fu
An alginate-based, stable and high mechanical strength hydrogel was fabricated by trivalent ions coordination in the presence of neodymium Ions. The chemical components and morphology of the hydrogel were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The effects of pH values on the swelling properties of hydrogels were investigated as it reveals that the pH values have an obvious effect on the swelling ratio. The as-prepared hydrogel exhibited high compressive strength and stability, which is much higher than that of the alginate hydrogel formed by Ca 2+ ionic cross-linked. Moreover, the Nd(III)-Alg hydrogel also exhibited the properties of fluorescence. The easy and fast fabrication, outstanding mechanical and stable properties indicated the hydrogel as a promising material that can be used in cartilage tissue.
研究领域:
材料科学
·
生物医学工程
✓ 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）