CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Kui Wang,Lu Shen,Qixuan Zhu,Rouyu Bo,Rong Lu,Xiaoshu Lu,Zixuan Fu
A type of MXene nanosheets with “organic–inorganic” structure was constructed through chemical reactions of 3-aminopropyltriethoxysilane and ethylene glycol diglycidyl ether on MXene surface to improve the interfacial and mechanical properties of ultrahigh-molecular weight polyethylene (UHMWPE) fiber-reinforced epoxy composite. The soft “organic” portion was conducive to good dispersion of epoxy-modified MXene nanosheets (M−MXene) in epoxy resin, whereas the “inorganic” part guaranteed the excellent mechanical performance of M−MXene. Then, M−MXene nanosheets were added into the epoxy matrix or deposited onto the surface of modified UHMWPE fibers to investigate the effect of M−MXene on composites’ properties. Results indicated the introduction of M−MXene could increase friction force and mechanical interlocking, produce excellent wettability with epoxy matrix, and form chemical bonds with the curing agent. Then, reduced stress concentration and complicated crack path were formed due to the unique “organic–inorganic” structure. Compared with UHMWPE/Epoxy, UHMWPE-PAS@M−MXene/Epoxy and UHMWPE-PAS/Epoxy@M−MXene illustrated significant improvements of 39% and 56%, respectively, in tensile strength and 311% and 324%, respectively, in interfacial shear strength (IFSS). Improved mechanical and interfacial properties of UHMWPE-PAS/Epoxy@M−MXene were attributed to the uniform distribution of M−MXene in the epoxy matrix, which generated a longer crack path from fiber to matrix and more crack deflections compared with those of UHMWPE-PAS@M−MXene/Epoxy.
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2025
·Vol. 36
·期 3
·e70151
·
IF 3.4
Kaijun Yu,Fanmin Kong,Guodong Jiang
Due to low surface energy, high chemical inertness, and poor interfacial properties of ultra-high molecular weight polyethylene (UHMWPE) fibers, it was difficult to achieve good adhesion with the matrix interface. Surface coating modification based on polydopamine (PDA) was widely applied to build high-performance and specifically functional surface modifications. In order to improve the interfacial adhesion between UHMWPE fibers and epoxy resin, this study used a one-step process with ammonium polyphosphate (APP) as a template to deposit a hybrid coating of PDA and N -(2-aminoethyl)-3-aminopropyltrimethoxysilane (KH792)/3-aminopropyltriethoxysilane (KH550)/nano silicon carbide (SiC) on the surface of UHMWPE fibers. Additionally, corona treatment was applied to increase oxygen-containing functional groups on fibers while also improving the processing technology of composites. Due to the polymerization of PDA, the deposition of SiC, and the hydrolysis-condensation of silanes, the nanohybrid coating can provide rich connection points and nanoparticles for hybrid fabrics without affecting the inherent strength of fibers. Corona improved surface roughness, and hybrid coatings enhanced the interfacial adhesion between the resin matrix and fibers. The UHMWPE fiber/epoxy composite material after improved composite technology exhibited excellent mechanical properties. Compared with untreated composite laminates, interfacial shear strength (IFSS) was increased by 88.81%, flexural strength was enhanced by 87.89%, impact strength was improved by 64.39%, and tensile strength was raised by 26.58%. The study showed that the nanohybrid coating co-deposited with PDA and corona enhanced the interfacial bond between epoxy resin and UHMWPE fibers, increased relative friction at the fracture interface, and improved load transfer between UHMWPE fibers and matrix.
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITE INTERFACES
·
2025
·
IF 2.4
Yan Sun,Maryam Mudasir,Ye Qian
The Ultra-High Molecular Weight Polyethylene (UHMWPE) fibers are significantly considered for Fiber-Reinforced Cementitious Composites (FRCC) development due to their excellent tensile strength and elastic modulus. However, due to the hydrophobic nature of the fibers, strong fiber-matrix interfacial bonding is still challenging. Mussel-inspired polydopamine coating has gained attention for its ability to preserve the fiber’s tensile strength while also serving as a platform for bi-layer applications. Polymerization through auto-oxidation of dopamine monomer proceeds very slowly, taking 12 to 24 h minimum for an efficient film formation. This study suggests an expeditious and feasible strategy to convert hydrophobic UHMWPE fibers into hydrophilic ones using catalytic polydopamine deposition mechanism. The reaction time was reduced by 75–88% while still achieving the desired surface properties. Following, a nanoclay coating procedure was developed for modified fibers. Water contact angle, SEM-EDX, XPS, and FTIR analysis were conducted, revealing enhanced wettability, varied surface morphology, and the presence of new functional groups in the modified fibers, respectively. The FRCC using coated fibers showed improved mechanical performance under tensile loads in terms of first-cracking strength, ultimate tensile strength, and strain capacity compared to uncoated fibers FRCC. Thus, quick strategies were explored for PDA and nanoclay coated surfaces considering strong fiber-matrix bridging in FRCC.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2024
·
IF 4.7
Chen Li,Liting Wei,Min Chen,Jiayi Zhang,Yang Yang,Boping Liu,Yulong Jin
CrO x /VO x /TiO 2 -SiO 2 was prepared via solvent-free and conventional wet-impregnation process with ethanol as solvent. The results of ICP-OES, N 2 adsorption-desorption, SEM-EDX, Raman and DR-Uv-vis spectra indicate that well-dispersed Cr and V sites in isolated state were the main species. Bimodal ultra-high molecular weight polyethylene/high-density polyethylene in-reactor blends (UHMWPE/HDPE IRBs) could be synthesized with polymerization activity ＞ 1×10 7 gPE·mol −1 Cr·h −1 . Moreover, the two catalysts displayed similar catalytic behaviors in temperature sensitivity, H 2 response and 1-hexene copolymerization efficiency, and their polymer products also show comparable molecular weight and molecular weight distribution , which implies analogous structures of their well-dispersed active sites. By contrast, the catalyst prepared by wet-impregnation process with water as solvent exhibited poor dispersity, which is reflected by its much lower activity and very different catalytic behaviors and polymer properties when compared with the well-dispersed catalysts. Therefore, the economic and green solvent-free process is promising for preparing highly-active CrO x /VO x /TiO 2 -SiO 2 .
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2020
·Vol. 42
·期 1
·462-473
·
IF 2.265
Raouf Belgacemi,Mehdi Derradji,Djalal Trache,Abdeldjalil Zegaoui,Oussama Mehelli
In this work, a new high-performance hybrid material was designed targeting excellent static and dynamic mechanical properties. To achieve this goal, the hybrid constituents, namely the ultra-high molecular weight polyethylene fibers and silicon carbide nanoparticles, were respectively, surface modified to graft the proper chemical species in order to maximize the interactions between the reinforcing phases and the epoxy matrix. The adopted grafting procedures were characterized by vibrational and morphological analyses. The generation a fully connected network resulted in consequent ameliorations in the mechanical and thermomechanical properties. Meanwhile, the effect of various amounts of the treated silicon carbide nanoparticles was also investigated. The finding indicated a gradual improvement in the overall mechanical properties up to 5 wt% for which the tensile strength reached its maximum value of about 477 MPa. The same hybrid materials displayed the remarkable storage modulus of 7.7 GPa at 25°C and a glass transition temperature of about 66°C. The synergistic stress transfer between the constituents was further evidenced by a proper investigation of the sample's fractured surfaces. Overall, the study revealed the great advantage of a fully connected network in developing lightweight and high-performance materials for exigent applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2026
·
IF 4.2
Jianyi Liu,Jialei Liu,Yang Yang,Jianhao Guo,Xiaofeng Xue,Ning Zhao,Yibin Zhan,Tiedong Xie,Boping Liu,Yulong Jin
Support modification is a simple but effective method to promote olefin polymerization catalysts, which is often correlated with enhanced acidity. Here, following this rule, the bimetallic catalyst CrOx/VOx/silica for UHMWPE/HDPE in-reactor blends was modified by alumina, sulfate, and alumina/sulfate. All modified catalysts were promoted notably, with ethylene polymerization activities about twice that of the unmodified one. Similarly, NH3-TPD and FTIR-pyridine confirmed their enhanced acidity. Theoretical studies emphasized the importance of Lewis acidic Al³⁺ site, which induced geometric and electronic rearrangement of the active site, thus reducing steric hindrance and improving LUMO reactivity. Sulfation further strengthened Al³⁺ acidity, exacerbating rearrangement and lowering the insertion barrier. Contrary to expectations, the alumina/sulfate-modified catalyst—with much stronger Brønsted and Lewis acidity—was only moderately promoted. XPS, DRS UV-vis, elemental analysis, and DFT results indicate that, while modification improves metal center electron deficiency and facilitates ethylene insertion, stronger acidity also weakens the anchoring of Cr(VI) and V(V) active precursors and promotes inactive Cr(III) and V(III) species. This effect was more pronounced for the superacidic alumina/sulfate modifier, partially counteracting its promotional effect.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 36
·21991-21999
·
IF 3.361
Kaixuan Zhang,Xu Peng,Can Cheng,Yang Zhao,Xixun Yu
In order to solve the problem of aseptic loosening of artificial joints resulting from the wear particles of artificial joint components in total joint replacement (TJR), we synthesized a new kind of metalo-organic particle (Sr/Zn-doped CPP/GNS) using spark plasma sintering (SPS) as a filler to enhance the comprehensive performance of UHMWPE. Sr/Zn-doped CPP/GNS was interfused evenly with UHMWPE particles and cured in a hot press instrument to prepare Sr/Zn-doped CPP/GNS/UHMWPE composites. FTIR and SEM were carried out to characterize Sr/Zn-doped CPP/GNS particles. EDS was carried out to characterize Sr/Zn-doped CPP/GNS/UHMWPE. The micro-structure, hardness, impact strength, tribology and bio-activities of Sr/Zn-doped CPP/GNS/UHMWPE composite materials were also investigated. The results confirmed the effectiveness of this method. The hardness, impact strength, and tribology of the composites were enhanced by adding homodispersed Sr/Zn-doped CPP/GNS particles into UHMWPE. In the meantime, Sr/Zn-doped CPP/GNS/UHMWPE composites could significantly promote the growth of osteoblasts due to the bio-activity of Sr/Zn-doped CPP/GNS. Furthermore, the addition of Sr/Zn-doped CPP/GNS particle-fillers into UHMWPE could promote the secretion of OPG from osteoblasts and inhibit the secretion of RANKL from osteoblasts, and thus increase the OPG/RANKL ratio. All the results above showed that Sr/Zn-doped CPP/GNS/UHMWPE composites with appropriate Sr/Zn-doped CPP/GNS content possessed superior physicochemical performances and bio-properties, and could be considered as promising materials to treat aseptic loosening in total joint replacement.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 10
·3125-3136
·
IF 3.348
Bin Yang,Shun Wang,Mengya Ding,Chengjun Wang,Cheng Lv,Yang Wang,Yuqing Yang,Nuo Zhang,Zhiqiang Shi,Jiasheng Qian,Ru Xia,Yirong Fang
In this study, HDPE/UHMWPE microporous films were prepared by blending UHMWPE and HDPE with DOP as the diluent via thermally-induced phase separation (TIPS) method. Morphological studies showed that the phase separation mode of the mixed systems was hardly changed in the presence of UHMWPE. Both average pore size and porosity of the blend films increased firstly and then decreased with increasing UHMWPE content. When UHMWPE content reached 1.5 wt%, both porosity and average pore size of the film reached their maximum values (with a porosity of 84.8% and an average pore size of 0.79 μm). The addition of UHMWPE was found to not only enhance the thermal stability of the HDPE/UHMWPE blend films, but also greatly reduce their thermal shrinkage rate as well as the closed cell temperature, which made the diaphragms containing UHMWPE have good prospect for the application in lithium-ion batteries (LIBs).
✓ 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）