APPLIED SURFACE SCIENCE
·
2014
·
IF 2.538
Lichun Ma,Linghui Meng,Dapeng Fan,Jinmei He,Jiali Yu,Meiwei Qi,Zhongwu Chen,Yudong Huang
PAN-based carbon fibers (CF) were functionalized with generation ( n ) 1–3 dendritic hexamethylenetetramine (HMTA) (denoted as CF-G n -HMTA, n = 1, 2 and 3) in an attempt to improve the interfacial properties between carbon fibers and epoxy matrix. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), dynamic contact angle analysis (DCA), interfacial shear strength (IFSS) and single fiber tensile testing were carried out to investigate the functionalization process of carbon fibers and the interfacial properties of the composites. Experimental results showed that generation ( n ) 1–3 dendritic hexamethylenetetramine was grafted uniformly on the fiber surface through the chemical reaction, and then it increased significantly the fiber surface polarity and roughness. The surface energy and IFSS of carbon fibers increased obviously after the graft CF-G 3 -HMTA, by 147.6% and 81%, respectively. Generation ( n ) 1–3 dendritic hexamethylenetetramine enhanced effectively the interfacial adhesion of the composites by improving resin wettability, increasing chemical bonding and mechanical interlocking, and the interfacial adhesion increased with dendritic generation number. Moreover, the grafting of generation ( n ) 1–3 dendritic hexamethylenetetramine on the carbon fiber surface improved the fiber tensile strength, which is beneficial to the in-plane properties of the resulting composites.
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
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yuye Zhu,Kangli Cao,Min Chen,Limin Wu
Advanced polymer composite coatings in the spacecraft are threatened by harsh space environment factors, such as strong UV radiation, atomic oxygen, thermal cycles, space debris, etc. Their service life can be drastically shortened by the unavoidable formation of cracks caused by these factors (especially strong and abundant UV radiation) during long-term flight. Herein, a UV-responsive microcapsule-based coating is developed for in-orbit damage repairing. UV-responsive microcapsules of which the inner polymeric shell can be degraded rapidly by the outer pure TiO2 shell under UV radiation are produced by UV-initiated polymerization of Pickering emulsions and subsequently embedded into silicon resin matrices. When damaged, some microcapsules will be ruptured under the stimulus of external force, afterward the unbroken ones around the scratched areas will be degraded by UV radiation, as a result, encapsulated healing agents can be released and finally repair cracks. In this system, UV-responsive microcapsules can release more agents more effectively due to the dual release mode, compared with the traditional crack-repairing system. Moreover, the damage of UV radiation in space can be transferred into the favorable ones, which makes it have a potential application in aerospace coatings.
研究领域:
材料科学
·
航空航天工程
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER COMPOSITES
·
2020
·Vol. 41
·期 5
·2046-2053
·
IF 2.265
Chuyuan Jia,Runze Zhang,Chengce Yuan,Zhenyu Ma,Yunzhe Du,Li Liu,Yudong Huang
The 3-aminopropyltriethoxysilane (APS) grafted aramid fibers were prepared by γ-ray irradiation and chemical treatment to improve the interfacial properties between aramid fibers and epoxy matrix. The functionalization process of aramid fibers was investigated by scanning electron microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectrum. After grafted with APS, the surface roughness of aramid fibers increased obviously, and the element content and composition of functional groups changed significantly in the modification process. Dynamic contact analysis indicated the wettability, and surface free energy of the fibers were greatly improved after the APS treatment. Monofilament pull-out measurement showed that the interfacial shear strength of aramid fiber reinforced composite increased by 51.03%, from 36.33 to 54.87 MPa after the surface modification. Moreover, benefited from the appropriate radiation and the APS grafting, the functionalization process did not damage fiber tensile strength.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2023
·
IF 9.1
Jian Gao,Kangning Wu,Zongliang Xie,Jianying Li,Shengtao Li
Thermochromic phase change composites (TPC) exhibit versatile functions under electrothermal stimuli, which are extensively applied as packaging, insulation and circuit components in considerable advanced smart electronics. However, space charge accumulation under DC voltages is still a critical and universal issue for the serious deterioration of functionalities and life-span of TPC and electronics. This study presents a novel strategy of suppressing space charge in thermochromic phase change epoxy composites (TPCE) by constructing interfacial barrier from tribo-positive shell thermochromic phase change microcapsules. The strong tribo-positive melamine-formaldehyde (MF) shell of microcapsules can establish negative charge barriers in the interfaces between microcapsules and epoxy matrix through triboelectrification, which is directly verified by Kelvin probe force microscopy. Pulsed electroacoustic measurement results exhibit the space charge accumulation in TPCE under an extreme electric field strength of 50 kV/mm and an elevated temperature of 70 °C can be significantly diminished by 39.3% compared to that of neat epoxy resin after incorporating merely 1 phr MF shell microcapsules, affirming the effect of interfacial barrier on space charge inhibition. The interfacial barrier could improve the charge carrier dissipation and mitigating the space charge accumulation as confirmed by hopping conduction analysis. Moreover, DC breakdown strength of TPCE can also be enhanced by 12.3% and 6.1% with 1phr microcapsules at 30 °C and 70 °C compared to that of neat epoxy resin owing to the suppressed space charge. The results provide a potential approach of designing high-performance thermochromic phase change composites for smart electrical and electronic devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2018
·Vol. 40
·期 7
·2734-2744
·
IF 1.943
Yannan He,Zhiqiang Yu
Bisphenol A epoxy resin (BAEP) was modified with high performance zirconium diboride (ZrB 2 ) ceramic particles using an in-situ polymerization method for the improvement of its dielectric and thermal properties. The dielectric properties of ZrB 2 /BAEP composites were investigated by numerical simulation and experiment. Thermal gravimetric analysis (TGA) and differential scanning calorimeter (DSC) were used to study thermal stability of the composites. Microstructures of filling composites were also observed by transmission electron microscopy (TEM). Results indicated that ZrB 2 particles were well dispersed in the polymer matrix. The dielectric constant of composites firstly decreased with the introduction of ZrB 2 particles. The composite filled with 2 wt% ZrB 2 particles exhibited the optimal dielectric properties. Data obtained from finite element analysis (FEA) were reasonable agreement with the experimental values. The thermal stability of BAEP also significantly increased due to the addition of ZrB 2 particles. The initial decomposition temperature of 2 wt% ZrB 2 /BAEP composite increased by 10°C compared with that of the pure BAEP. POLYM. COMPOS., 40:2734–2744, 2019. © 2018 Society of Plastics Engineers
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2020
·
IF 4.495
Zhenyue Zou,Yan Qin,Huadong Fu,Di Zhu,Zhuangzhuang Li,Zhixiong Huang
Carbon fiber-reinforced ceramicizable phenolic resin matrix composites have been widely used in the field of thermal protection materials. In this paper, the ZrO 2f -coated C f (ZrO 2f /C f ) hybrid fibrous reinforcements were designed to improve oxidation resistance of carbon fiber and ceramicizable composites reinforced by ZrO 2f /C f hybrid fibrous reinforcements were prepared to investigated oxidation resistance and mechanical properties of the composites at high temperature. The results show that ZrO 2f /C f hybrid fibrous reinforcements have good thermal stability and high oxidation resistance, and its ceramicizable composites have good bending strength at high temperature. Weight loss rate of the composites is only 21 %, and bending strength can be as high as 39 MPa when ablation time was 12 min at 1400 °C.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Jiayi Zhou,Ruobing Yu,Jinyu Shi
Carbon quantum dots (CQDs) with extended fluorescence lifetime and high quantum yield (>50 %) were successfully synthesized through a hydrothermal method from citric acid and polyethylene glycol (PEG) as carbon precursors. Then cetyltrimethylammonium bromide (CTAB) was used to modify CQDs. The as-prepared modified CQDs possess excellent dispersibility in both aqueous and organic media. When modified CQDs were incorporated into an acrylic resin matrix, the light conversion coating with good comprehensive properties was formed. The coating possesses high fluorescence quantum yield (16.52 %), the fluorescence lifetime (9.86 ns), low water contact angle (less than 10°), and high transmittance (>80 %). Also, the coating is characteristic of excellent anti-fog properties. The high-quantum-yield photoconversion coatings holds significant promise for applications in optoelectronic devices, advanced anti-counterfeiting systems, and efficient light-conversion technologies.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
高分子科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Chang Su,Jue Cheng,Junying Zhang,Feng Gao
Since its first report in 2011, researches on vitrimer transesterification catalyst systems had been gradually focused on three aspects: low toxicity and low corrosion, good compatibility with resin matrix, and high catalytic performance for bond exchange reactions. However, it is difficult to obtain a catalytic system that can simultaneously meet the above three expectations. This research conducted the preparation of autocatalytic transesterification epoxy vitrimers by directly mixing small tertiary amine molecules with epoxy-anhydride systems and covalent incorporating tertiary amine structures into curing systems. And the influence of tertiary amine structures and covalent incorporation on the various properties of vitrimers was also discussed. A tertiary amine promoter composed of isofunctional group ratio reaction from di-n-hexamine and epoxy resin provided by this research overcame the problem of poor compatibility between tertiary amine and epoxy resin, introduced a highly active catalytic structure into vitrimer curing system. And the result indicated that the vitrimer prepared according to our new strategy had excellent comprehensive performance. In conclusion, a new idea of covalent incorporation was proposed to provide ideas and inspiration for the development of new tertiary amine-based autocatalytic transesterification epoxy vitrimers.
研究领域:
材料科学
·
聚合物化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2020
·
IF 7.094
Jianjie Qin,Chengguo Wang,Ruijiao Lu,Shunsheng Su,Zhiqiang Yao,Linbao Zheng,Quan Gao,Yanxiang Wang,Qifen Wang,Huazhen Wei
The uniform growth of carbon nanotubes (CNTs) on the surface of carbon fiber cloth (CFC) was carried out using quasi-vacuum chemical vapor deposition (CVD). It was found that the oxidation of CFC by H 2 O 2 was critical to the uniform growth of CNTs. A large number of oxygen-containing functional groups were introduced on the surface of the fiber during oxidation, the content of activated carbon had increased by 27.06%, which could improve the wettability of the fiber and the binding property to the catalyst precursor. After prepared into composites, the interlaminar shear strength (ILSS) was increased by 6.28%, as measured by the short beam test. The analysis of the fracture surfaces revealed that the growth of CNTs enhanced the mechanical interlocking and improved the mechanical properties . For the CNTs-grown CFC/epoxy composite, the strength and toughness can be increased and the stress concentration can be reduced due to the long-distance diffusion of destructive cracks from the resin matrix to the carbon fiber. Finally, the mechanism of improvement in composite performance was explained from the perspective of multiscale enhancement.
研究领域:
材料科学
·
纳米技术
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Fukang Li,Ning Ding,Jean Jacques Kouadjo Tchekwagep,Martin Pengou,Hervé Kouamo Tchakouté,Qiuyue Ding,Nan Hou,Huixia Xu
Carbon fiber reinforced polymers (CFRP) composites, prized for their outstanding mechanical properties, have garnered extensive applications across critical industries including aerospace, transportation, new energy systems, and power infrastructure. However, under increasingly demanding service environments, improving the interlaminar fracture toughness of CFRP composites has become a pivotal challenge to ensure structural integrity and longevity. The present work presents an effective design strategy to address this issue for the carbon fiber/epoxy/core-shell rubber composite by integrating multi-scale reinforcements. The mechanical performance of specimens with different compositions was systematically analyzed. Synergistic multi-scale toughening mechanisms were rigorously elucidated through fracture surface morphology analysis and correlative mechanical data interpretation. The results demonstrate that incorporating short carbon fibers (SCF) into CFRP (i) and adding core-shell rubber (CSR) to CFRP (ii) both significantly enhance the toughness. CFRP (iii), which contains both SCF and CSR, exhibits an even more pronounced toughening effect. The subsequent grafting of carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) onto SCF, resulting in CFRP (iv) with SCF-CNTs and CSR mixed, demonstrates superior interlaminar fracture toughness compared to CFRP (iii). Specifically, the G IC $$ {G}_{\mathrm{IC}} $$ and G IC $$ {G}_{\mathrm{IC}} $$ of CFRP (iv) increase by 12.89% and 15.46%, respectively, compared to CFRP (iii). This improvement is attributed to the strengthened interfacial bonding between MWCNTs-COOH and the matrix through mechanical interlocking, which enhances fiber bridging and the effects of core-shell rubber. This multi-scale reinforcement paradigm provides critical insights into the design of damage-tolerant CFRP composites for extreme operational scenarios, advancing their deployment in next-generation engineering systems subjected to complex mechanical loads.
研究领域:
材料科学
·
复合材料
·
聚合物基复合材料
·
机械工程
·
纳米复合材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Weiya Tan,Wenjie Zhao
Addition of Ti 3 C 2 T x nanosheets into epoxy matrix is crucial for improving the mechanical and anti-corrosion properties, depending on their unique structures and properties. However, randomly-arranged Ti 3 C 2 T x nanosheets failed to meet higher corrosion protection requirements especially under alternating hydrostatic pressure (AHP) environment. Herein, inspired by the unique structure of mille crepe cake, the tannic acid (TA)-functionalized Ti 3 C 2 T x nanosheets were distributed parallelly in the epoxy matrix using a simple blade-coating method to form layer-by-layer (LBL) coating. Particularly, epoxy matrix incorporated with TA@Ti 3 C 2 T x exhibited a nearly perfect internal parallel arrangement structure due to shear force during blade-coating, excellent compatibility, and higher binding force. As being immersed 60 days at 1 atm and 240 h at 20 MPa AHP in 3.5 wt% NaCl solution, the worst frequency impedance values was enhanced by 1–3 orders of magnitude for the parallel alignment in comparison to the randomly-arranged TA@Ti 3 C 2 T x composite coating. The results were mainly due to the fact that parallelly-arranged TA@Ti 3 C 2 T x could maximize tortuosity and got the utmost out of the barrier properties of composite coating. Moreover, electrochemical characterization of defects and Molecular Dynamics (MD) simulations results proved that TA could react with Q235 steel in three ways to form ferric-tannates, which could further prevent the corrosion of steel. Prospectively, the parallelly alignment of TA@Ti 3 C 2 T x nanosheets in epoxy would greatly increase the corrosion resistance of composite coating, especially suitable for AHP environment.
研究领域:
材料科学
·
腐蚀工程
·
表面涂层
·
纳米技术
✓ 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）