Polymers
·
2020
·Vol. 12
·期 3
·521
·
IF 3.426
Lei Han,Haifeng Cai,Xu Chen,Cheng Zheng,Weihong Guo
Ultra-high molecular weight polyethylene (UHMWPE)/epoxy composites with excellent adhesive properties were prepared by forming an interface membrane on the UHMWPE fiber surface. The interface membrane of the UHMWPE fiber and epoxy resin was polymerized by an aldol condensation between polyvinyl alcohol (PVA) and glutaraldehyde. Different surface treatment methods of UHMWPE fibers were optimized and the two-step PVA-glutaraldehyde condensation (Corona-PG-2S) method is the best. The interfacial adhesion between UHMWPE fiber and epoxy resin was enhanced, and the adhesive properties of the composite were improved. X-ray photoelectron spectroscopy (XPS) and energy dispersive spectrum (EDS) results of the fiber treated by Corona-PG-2S shows that the surface oxygen content was up to 25.0 wt %, with an increase of 17.3 wt % compared with the surface oxygen content of unmodified UHMWPE fiber, which indicated that the surface polarity was greatly enhanced. The adhesive properties were improved by improving the polarity of the surface. The peel strength, ultimate cohesive force, tensile strength and flexural strength of the composite treated by Corona-PG-2S were greatly increased to 262.8%, 166.9%, 139.7%, 200.6% compared with those of unmodified samples. The composite prepared by Corona-PG-2S had excellent adhesive properties, demonstrating that the Corona-PG-2S method plays a major role in significantly improving the composite adhesive properties.Keywords:UHMWPE fiber;epoxy resin;PVA;adhesive property;aldol condensation
研究领域:
材料科学
·
复合材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2024
·Vol. 64
·期 7
·2988-3002
·
IF 3.2
Sun Yun,Xuefeng Pan,Feng Zhang,Xuelian He
The cavitation process of high-performance HDPE/UHMWPE blends with a uniform dispersion of UHMWPE during cold stretching was investigated. It was observed that incorporating a small amount of UHMWPE into the HDPE matrix resin can serve as a nucleating agent, increasing the number of contact sites and accelerating the crystallization rate. This leads to the formation of thicker lamellar crystals and tethered molecules, ultimately enhancing the mechanical properties of the HDPE matrix. Furthermore, the relationship between the natural tensile ratio and strain-hardening modulus was confirmed. Microstructural changes within the blends were also explored. As the drawing tangles in the middle, the cavities subsequently evolve by collapsing and merging to align parallel to the tensile direction, culminating in tensile damage forming a large crack in the final macroscopic form. As a result, the presence of more tethered molecules in the later stages of stretching inhibits further cavity growth. Highlights The HDPE/UHMWPE blends were prepared by solution blending and ultrasound-assisted twin-screw extrusion. The mechanisms underlying the formation and evolution of cavities in HDPE/UHMWPE blends, which lead to stress whitening during tensile damage, were examined by using DSC and SAXS/WAXD. The relationship between microstructure and mechanical properties was analyzed by cold-drawing the molded blended sheets at room temperature.
研究领域:
材料科学
·
高分子物理
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2022
·
IF 5.62
Shifan Li,Conglin Dong,Chengqing Yuan,Xiuqin Bai
High performance materials with low friction and high vibration-absorbing properties play a vital role in stable operation of water-lubricated ship stern bearings. Therefore, a TPU composite material reinforced by WS 2 and UHMWPE was prepared. After friction and vibration tests, it was found that WS 2 reduced the coefficient of friction of TPU matrix with its excellent lubricating properties, and after adding UHMWPE, the coefficient of friction continued to drop to 0.07 and became more stable during the whole friction process . The synergistic effect of WS 2 and UHMWPE effectively reduced the friction and amplitude of the composite and made the composite present the best tribological and vibration-absorbing performance. This research provided a basis for the design of new water-lubricated ship bearing materials .
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 8
·51674
·
IF 3.125
Yudong Lin,Zhiwei Guo,Chengqing Yuan
Aboard ship, the use of lubricating oil in mechanical equipment is sometimes difficult to achieve and applied oil can easily leak. The use of self-lubricating materials can largely solve this problem. In this study, three kinds of solid lubricant-enhanced 304 stainless steel-backed ultrahigh molecular weight polyethylene (UHMWPE) fabric composites were fabricated with the addition of graphite, molybdenum (IV) disulfide, or polytetrafluoroethylene (PTFE). They were tested under various rotating speeds and compared with pure steel-backed UHMWPE fabric composites. The tribological performance of these composites was evaluated by analysis of friction coefficient, wear rate, and worn face morphology. The results showed that PTFE-enhanced composites exhibited the best friction reduction performance under all test conditions, better antiwear ability at rotating speeds under 200 rpm, and optimized wear surface morphology, thus indicating better synergy between PTFE and UHMWPE fabric.
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
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Lijie Yin,Wei Li,Yichen Lu,Yang Meng,Ming Tian,Nanying Ning,Wencai Wang
To enhance the interfacial adhesion between ultra-high molecular weight polyethylene (UHMWPE) fibers and rubber, a novel environmentally friendly low-temperature dipping system was developed. This system involves reacting polyethylene glycol, butanone oxime-capped hexamethylene diisocyanate, and a cross-linking agent to form a network structure, which is then blended with latex to create a polypolyol-isocyanate-latex (PIL) dipping solution. Initially, the UHMWPE fiber surface was activated using continuous plasma treatment, serving as an alternative to traditional activation solution. Subsequently, the fibers were dipped by the PIL solution. The H pull-out force between the modified UHMWPE fibers and rubber increased by 114 % to 137.6 N, outperforming the conventional resorcinol–formaldehyde-latex (RFL) system. In addition, the PIL system avoids the use of toxic resorcinol and formaldehyde and can cure at lower temperatures, making it more suitable for UHMWPE fibers with low melting points. The modified UHMWPE fiber/rubber composites also exhibited good aging and fatigue stability. This method is characterized by its simplicity, minimal damage to the fibers, and advantages in continuity and scalability, offering new guidance for the interface design of UHMWPE fiber/rubber composites.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yang Xiao,Lin Zhang,Bin Wei,ChangFeng Lu,Ling Li
Generally, modification of materials by adding multiple types of nano particles could cause dispersion problems, generally limited the performance improvement effect. Herein, we report the modification of UHMWPE materials by organic-inorganic core-shell particles with PTFE as the core and Al(OH) 3 as the shell, which prepared by in-situ polymerization of sodium bicarbonate and aluminum sulfate solution . Core-shell particles were filled in UHMWPE matrix and sintered into composite by spark plasma sintering (SPS). The mechanical and tribological properties of the composites were characterized by tensile compression testing machine, universal micro tribometer (UMT-5), three-dimensional white light interferometer and scanning electron microscope (SEM). The results showed that the addition of core-shell structural materials effectively improved the tribological properties (friction coefficient decreased by 40%, wear rate decreased by 30%) and mechanical properties (compression strength increased by 2.4 times) of the composites. It was demonstrated that the inorganic framework provided strength to improve the mechanical properties and wear resistance of materials, and the organic phase was used as a lubricating phase to reduce the friction coefficient of materials. Surface treatment of core-shell particles both improved the binding between particles and matrix and decreased the formation of agglomerations, thus significantly reducing ploughing phenomena’s effect produced by abrasive wear of agglomeration
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
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Jiajing Zhang,Zhuan Fu,Chunhua Zhang,Feng Qiu,Jiahao Xu,Liangjun Xia,Yuhai Guo,Weilin Xu
The development of textile wearable electronics has increased demands and requirements for thermal management materials due to integrated and miniaturized soft equipment. In this work, the surface of ultrahigh molecular weight polyethylene (UHMWPE) fibers was first decorated by polydopamine (PDA) to improve the surface activity and construct a steady interface layer. Then the boron nitride/polyurethane coating surface modified UHMWPE composite yarns with good thermal conductivity were produced using a coaxial wet forming process. The thermally conductive composite yarns demonstrated great mechanical properties (5.09 % strain, 0.79 N/tex strength) and thermal conductivity (0.54 ± 0.02 W·mK −1 ) with the BN/PU weight ratio of 1. Furthermore, the resistance to failure cycles was taken place, and the composite yarns kept good thermal conductivity after multiple cycles twisting, bending, washing, cooling and heating cycles. By the coaxial wet fabrication, the thermally conductive composite yarns were constructed, offering a viable and trustworthy method for creating polymer-based thermal interface materials with high thermal conductivity.
研究领域:
材料科学
·
纺织工程
·
热管理
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 27
·18480-18487
·
IF 3.9
Yunan Zhu,Rong Liu,Xiaoxiao Xu,Yijun Fu,Jiamu Dai,Wei Zhang,Guangyu Zhang,Junxiong Zhang,Xiaomin Ma,Pin Chen
Water pollution caused by the continuous development of industrialization has always been a common concern of mankind. Herein, a novel strategy to fabricate a high-performance composite membrane based on dual-network structured nonwoven net/UHMWPE nanopores via a thermal phase separation and composite technique is reported. By thermal phase separation of ultra-high-molecular weight polyethylene (UHMWPE)/liquid paraffin (LP), this approach enables 3D nanopores to tightly bond with a nonwoven net to form a dual-network structure. The dual-network composite membrane possesses the integrated features of pore structure and high porosity (89.9%). After modification with hyperbranched polymers (HBPs), the composite membrane with the desirable surface chemistry achieves high-efficiency filtration (water flux = 1054 L m−2 h−1, rejection rate = 50 nm PS nanospheres almost close to 100%, and antibacterial properties). The fabrication of such composites may provide new insights into the design and development of high-performance filtration and separation materials for various applications.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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.
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
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 .
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
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.
研究领域:
生物医学工程
·
材料科学
·
骨科医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULES
·
2019
·
IF 5.997
Yuming Chen,Peng Liang,Zhen Yue,Wei Li,Chuanding Dong,Binbo Jiang,Jingdai Wang,Yongrong Yang
Chain entanglement was very important for adjusting the processability and mechanical property of nascent ultrahigh molecular weight polyethylene (UHMWPE). So far, it is still a mystery to unravel the formation mechanism of entanglements when the ethylene polymerization is conducted by the heterogeneous catalysts. In this study, a series of weakly entangled UHMWPE was synthesized by the polyhedral oligomeric silsesquioxane/MgCl2 nanoaggregates modified Ziegler–Natta catalysts. The structure of nanoaggregates was evaluated by X-ray photoelectron spectroscopy, density functional theory simulations, and scanning probe microscope experiments, where the coordination strategy of MgCl2 and hydroxyl of POSS was investigated. These nanoaggregates presented extremely low activity on ethylene polymerization and were proved to serve as isolators for separating the active sites and growing chains. The entanglement density of nascent UHMWPE (reflected by the value of initial storage modulus G′(t=0)) was exponentially decayed with the polymerization activity of increased numbers of nanoaggregates. Importantly, this exponentially decayed effect contributed by increased numbers of POSS/MgCl2 isolators offset the rapid power function increment of entanglements upon rising the temperature, which was the essential reason for the successful synthesis of weakly entangled UHMWPE even at 85 °C. Finally, we have proposed the dependence and sensitivity of G′(t=0) (i.e., indicating the initial entanglement density of nascent polymers) on the polymerization activity, which was able to trace the formation of entanglements during polymerization through the POSS modified heterogeneous catalyst.
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
危险品化学品经营许可证（带存储）