ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Binbin Dong,Yahao Guo,Shuangjie Sun,Hao-Yang Mi,Ping He,Maxwell Fordjour Antwi-Afari,Chuntai Liu,Changyu Shen
High-performance low-cost superhydrophobic sponges are desired for selective recycling of leaking oils from open water. Herein, an ingenious method is proposed to fabricate an ultrathin superhydrophobic coating layer on a commercial sponge. The coating layer is composed of a shish–kebab-structured porous ultrahigh molecular weight polyethylene (UHMWPE) film that is fabricated from a UHMWPE/xylene solution by shear flow-induced crystallization. A strong relationship between the shish–kebab crystallite morphology and the superwetting performance is confirmed. The UHMWPE coating layer fabricated at a 900 rpm rotation rate possesses a lamellae size of 95.1 nm and a lamellae distance of 27.4 nm, which lead to a high water contact angle of 157° and a low contact angle hysteresis of 4.5°. The UHMWPE layer prepared in 4 min of treatment is thick enough to prevent the intrusion of water even under vacuum and remain superoleophilic. The developed UHMWPE-coated sponge (UCS) exhibited a high absorption capability of 70–191 g/g toward various oils and solvents, which is comparable with the neat melamine sponge. Its excellent compressibility and durability enabled fast recovery of absorbed oil with a high recovery rate (over 85%) by mechanical squeezing. The UCS could be assembled into small devices to selectively collect oil from open water and a water/oil mixture using a pump, which manifests its promising practical applicability. Apart from these extraordinary properties, the approach developed has the lowest material cost and the shortest processing time hitherto.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yang Sui,Peng Wei,Kunhang Yan,Chuanbo Cong,Xiaoyu Meng,Zhichao Yang,Pengpeng Bai,Yu Tian,Qiong Zhou
The entanglement degree of ultra-high molecular weight polyethylene (UHMWPE) exhibits an inverse correlation with its rheological properties and wear resistance, creating a fundamental challenge in simultaneously enhancing melt processability while preserving superior anti-wear performance. The fabrication of polymer nanocomposites with reasonable structure is expected to solve this intractable problem. Graphene has excellent wear resistance and can reduce the viscosity of polymers. Therefore, we prepared a series of UHMWPE/Graphene composites in this paper. The effects of graphene on the microstructure, rheological behavior, crystallization behavior, and wear resistance of UHMWPE were investigated by transmission electron microscopy, small-angle x-ray scattering, dynamic mechanical analysis, and differential scanning calorimeter characterization methods, and hence the rheological and wear mechanisms of the composites were analyzed. The results show the optimized composite with 0.4 wt% graphene demonstrates remarkable performance synergies: a 68% reduction in complex viscosity and a 4.5-fold enhancement in wear resistance (the specific wear rate decreased from 2.45 × 10 −4 to 0.56 × 10 −4 mm 3 /N m). This work establishes a materials design paradigm for overcoming the intrinsic property trade-offs in UHMWPE, particularly relevant for applications demanding both processability and durability.
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产品关联
DOI
高影响因子
MATERIALS & DESIGN
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2018
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IF 4.525
Kui Wang,Mingqiao Liu,Changyuan Song,Lu Shen,Peng Chen,Shian Xu
Surface-conductive ultra-high molecular weight polyethylene (UHMWPE) fibres were prepared via in situ reduction and deposition of graphene oxide (GO). GO was dispersed in water to form a uniform and stable suspension. Subsequently, GO was chemically reduced into rGO and spontaneously deposited onto gel-spun, ultra-drawn UHMWPE fibres. The UHMWPE was coated with polydopamine (PDA), emulating the surface coating in mussels, prior to the rGO deposition to improve the bonding between rGO and the fibre surface. Characterizations using SEM, EDX , FTIR and XPS confirmed the effectiveness of the PDA coating and rGO deposition and the covalent bonding between PDA and rGO. The electrical resistance of UHMWPE-PDA-rGO decreased monotonically with increasing GO percentage in the suspension and deposition cycle. The UHMWPE-PDA-rGO exhibited an electrical resistance of 10 5 Ω/cm, whereas UHMWPE and UHMWPE-PDA showed a resistivity of >10 12 Ω/cm. Using Ag deposited UHMWPE-PDA as the benchmark, UHMWPE-PDA-rGO was superior in durability, conductivity and retention of ultrahigh tensile properties . Analysis using the TGA data and linear density confirmed the partial reduction of GO during processing. Furthermore, a plausible log-log linear relationship was revealed between the resistance and the weight ratio of UHMWPE-PDA + G TGA and pure UHMWPE-PDA ( χ ), which tentatively explained the deposition mechanisms .
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 4
·1-12
·
IF 2.8
Yang Qun,Zhang Run,Tian Jing,He Hailong,Xue Ping,Chen Xiaonong,Jia Mingyin
Ultra High Molecular Weight Polyethylene (UHMWPE), a captivating material, presents incomparable physical and chemical properties due to very high molecular weight and intricate crystalline process. In this study, two kinds of nano-materials, one-dimensional multi-walled carbon nanotubes (MWCNT) and two-dimensional lamellar graphene nanoplatelets (GNP), were added to UHMWPE, investigating the isothermal and non-isothermal crystallization processes of UHMWPE/nano-materials composites. Jeziorny and Mo method are all suitable for describing the non-isothermal crystallization process. Interestingly, both MWCNT and GNP did not play the role of heterogeneous nucleating agents. The crystallization activation energy of UHMWPE/nano-materials composites is slightly enlarged, proving that the addition of these two nanomaterials is unfavorable to the crystallization process. In addition, during the non-isothermal crystallization process, the neat UHMWPE exhibits a lower crystallization rate than that of samples modified by nano-materials at initial crystallization stage, and possesses a slower crystallization rate than that of samples modified by nano-materials at end crystallization stage. This phenomenon may be attributed to the fact that the incorporated nano-materials abate the number of the physical entanglement points of UHMWPE molecular chains, which weakens the restriction on the movement of molecular chains and increases the crystallization rate at the initial stage. However, the crystallization rate of the samples incorporated with nano-materials decreases rapidly with time. Besides, the Avrami exponent is about 2 in both isothermal and non-isothermal crystallization process, which may be related to the geometry of crystal growth.
研究领域:
材料科学
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聚合物工程
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2019
·Vol. 137
·期 19
·48667
·
IF 2.188
Rui Wang,Yanyu Zheng,Lihao Chen,Shaoyun Chen,Dongxian Zhuo,Lixin Wu
Using conventional mixing techniques, the mechanical properties of prepared carbon nanotube (CNT)/polymer composites are not impressive enough, because of their aggregation problem at a high loading of CNTs. In this article, high mechanical performance ultrahigh molecular weight polyethylene (UHMWPE) nanocomposites with high loading of multiwalled CNTs were successfully fabricated by a new manufacturing technique. Specifically, the tensile strength and storage modulus at 25 °C of UHMWPE nanocomposites with 32 wt % of nanotubes prepared by the novel technique reaches 107.6 MPa and 6.0 GPa, respectively, about 4.7 times and 5.0 times of that of pure UHMWPE resin, which are also very high experimental results compared with polyethylene nanocomposite prepared by traditional hot-compression techniques. These attractive results suggest that the high-loading CNTs without sacrificing their dispersion and the impregnation quality of polymer-impregnated buckypapers are essential for fabricating CNTs/polymer composites with superior mechanical properties. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 137 , 48667.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2017
·Vol. 218
·期 7
·1600443
·
IF 2.5
Yulong Jin,Ruihua Cheng,Xuelian He,Zhen Liu,Ning Zhao,Boping Liu
Novel vanadium-oxide-based catalysts supported on alumina, zirconia, or titania-modified silica, which are able to synthesize ultrahigh molecular weight polyethylene (UHMWPE), are successfully developed. Compared with the unmodified silica supported catalyst, the activities of the modified catalysts are substantially enhanced. By changing the polymerization temperature ( T p ) from 90 to 60 °C, the molecular weight of the produced UHMWPE can be easily regulated from 2 × 10 6 to more than 6 × 10 6 g mol −1 . It is the first time that chloride-free nonsingle site catalysts have been developed to synthesize UHMWPE within such a broad range of T p . Catalyst characterization by NH 3 -temperature-programmed desorption and pyridine-Fourier transform infrared spectroscopy reveals that the modified catalysts have increased acidity derived from both Lewis and Brønsted acid sites. The X-ray photoelectron spectroscopy characterization indicates that the vanadium on the modified catalysts is more electron deficient. Thus, the acidity of the catalysts and the electronic state of the vanadium play a critical role in determining the activity of the vanadium active sites for ethylene polymerization.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
Friction
·
2024
·Vol. 12
·期 11
·2480-2490
·
IF 6.3
Hou Yacong,Chen Lei,Zhang Zheng,Chang Jinlin,Weng Ding,Ma Yuan,Wang Jiadao
Low friction ice sliding interfaces were critical for ski performance optimization. Traditional fluorinated ski waxes have attracted considerable attention for enhancing the hydrophobicity, anti-wearing, and oxidation resistance of ski-ice base. However, the toxicity and complexity of the waxing process limited batch manufacturing of low-cost and non-toxic ski-ice base, what is more, the wax covering on the base wore and failed during skiing due to the friction between ski and ice. Herein, we demonstrated a novel ultra-high molecular weight polyethylene (UHMWPE) composite that could maintain a low coefficient of friction (COF) with about 0.026 for at least 160 min when skiing on the ice. Microcapsule (MS) could release liquid (liquid paraffin (LP)). The released LP further enhanced the hydrophobicity of UHMWPE’s surfaces when friction occurred, which would maintain the stability and durability of the water film, and achieved superior and long-lasting friction resistance. Compared with other microcapsules with lower hydrophobic core, microcapsules with LP performed the best in reducing the friction of ski base from 0.126 to 0.024. Meanwhile, the COF of the surface kept at about 0.02 even after 12 rapid temperature changes. The presented UHMWPE composite of encapsulated liquids showed great potential and broad application owing to its simplicity and efficiency in winter sports.
研究领域:
材料科学
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冬季运动工程
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产品关联
DOI
高影响因子
WEAR
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2021
·
IF 3.892
Chaobao Wang,Xiuqin Bai,Zhiwei Guo,Conglin Dong,Chengqing Yuan
The insufficient lubrication caused by the low viscosity of water has greatly limited the application of water-lubricated bearing, especially under the conditions of heavy load and low speed. In order to solve this problem, a composited strategy is proposed by using the hydration lubrication of polyacrylamide (PAAm) hydrogel to improve the tribological performances of UHMWPE . The PAAm hydrogel microspheres were synthesized by emulsion polymerization , and the PAAm hydrogel microsphere/UHMWPE composites were prepared by melt blending method. The effects of particle size, crosslinking density and filling content of PAAm microspheres on the tribological performances of the composites were tested and analyzed. The results show that the PAAm fragments can form a hydration lubrication layer and improve the tribological performances of the composite. The design of PAAm microsphere/UHMWPE composite provides a novel method to develop high-performance materials for water-lubricated stern tube bearing.
研究领域:
材料科学
·
摩擦学
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2022
·Vol. 29
·期 10
·1-13
·
IF 3.061
Liu Zhipeng,Du Yue,Li Jiangshan,Kang Da,Ye Chunlin,Zhao Shicheng
The flowability of Ultra-high molecular weight polyethylene (UHMWPE) is very poor so flow modification is needed to improve its processing efficiency, but flow modification could significantly deteriorate its wear resistance. To solve this technical problem, it is necessary to recognize the reasons why flow modifiers deteriorate the wear resistance of UHMWPE. In current research, influence of calcium stearate (CaSt) which is a commonly used flow modifier on the wear resistance of UHMWPE was investigated, the experimental results showed that a small amount of CaSt (0.5wt%) could significantly deteriorate the wear resistance of UHMWPE (11%). Subsequently, the effect of CaSt on the three-phase structure (amorphous, crystalline and interphase) of UHMWPE was investigated to explain why CaSt deteriorates the wear resistance of UHMWPE in terms of structure–property relationship. The study of crystallization and melting behavior indicates that the incorporation of CaSt makes the matrix produce more well-formed crystals thus increasing the hardness of the matrix, and the increase in hardness can alleviate the degree of abrasive wear. The study of the amorphous region found that CaSt has a unique disentanglement effect, which reduces the degree of entanglement of molecular chains of the matrix, and the reduction of the degree of entanglement deteriorates the shear resistance of the matrix, thus aggravating the shear damage of the sample during the wear process. Meanwhile, the disentanglement effect of CaSt can also improve the recrystallization ability of the matrix, reducing the interphase of the matrix thus making the matrix more susceptible to structural damage during the wear process. Furthermore, the incorporation of CaSt significantly reduces the heat resistance of the matrix, which makes the wear resistance of the matrix deteriorate more caused by the friction heat during the wear process. This paper can provide theoretical guidance to solve the problem of severe degradation of wear resistance after flow modification of UHMWPE and provide inspiration for the structural design of other wear-resistant materials.
研究领域:
材料科学
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机械工程
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产品关联
DOI
高影响因子
APPLIED RADIATION AND ISOTOPES
·
2021
·
IF 1.513
Oussama Mehelli,Mehdi Derradji,Raouf Belgacemi,Slimane Abdous,Abdelmalek Habes,Wenbin Liu
Aiming the development of advanced and lightweight thermal neutrons shields, a new hybrid composite was developed from UHMWPE fibers, epoxy and boron carbide (B 4 C) particles. The UHMWPE fibres were chosen because of their high hydrogen contents and exceptional mechanical properties. The neutrons shielding tests were performed using an optimized experimental setup at NUR research reactor, Algiers. Overall, the developed materials displayed remarkable neutrons screening performances. Meanwhile, the best performance was recorded at B 4 C amount of 20 wt% with a macroscopic cross-section (Σ) of with a 0.313 cm −1 equivalent to a mean free path (λ) of 2.2 cm.
研究领域:
材料科学
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核工程
·
复合材料
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产品关联
DOI
PubMed
高影响因子
POLYMER
·
2023
·
IF 4.6
Lijie Yin,Jianjun Yang,Xiaoming Shao,Ming Tian,Nanying Ning,Wencai Wang
A plasma-assisted surface modification method was introduced to enhance the interfacial adhesion of rubber composites reinforced with ultra-high molecular weight polyethylene (UHMWPE) fibers. First various reactive monomers were grafted onto the fiber surface via a plasma-assisted radical polymerization reaction . Subsequently, the grafted fibers underwent RFL (resorcinol-formaldehyde-latex) dipping process to bolster their interfacial adhesion with rubber. Compared with the original UHMWPE fibers, the modified fiber-reinforced rubber composites showed an increase in H pull-out force by 105.3 %–165.7 N and peel strength by 145.2 % to 10.3 N/mm, reaching the level of general-purpose fabric-core conveyor belt (≥4.5 N/mm). After the modification, the dynamic fatigue life and aging stability of the fiber-reinforced rubber composites were significantly improved, thereby enhancing the service life and safety of the composites. The results show that this method greatly improves the chemical activity, hydrophilicity , and surface roughness of UHMWPE fibers with minimal damage, rendering it a promising choice for industrial applications.
研究领域:
材料科学
·
高分子科学
·
复合材料
·
表面工程
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产品关联
DOI
高影响因子
Defence Technology
·
2025
·
IF 5.9
Yiting Meng,Heyu Chen,Hengyu Lin,Zhehong Lu,Yubing Hu,Yanan Zhang
Inspired by the thermal stability mechanism of thermophilic protein, which presents ionic bonds that have better stability at higher temperatures, this paper proposes the introduction of electrostatic interactions by adding carboxyl-modified silica (C-SiO 2 ), PAA, and CaCl 2 to achieve higher viscosity over 25 °C. The rheological behavior of C-SiO 2 -based shear thickening fluid (CS-STF) was investigated at a temperature range of 25–55 °C. Unlike SiO 2 -based STF, which exhibits single-step thickening and a negative correlation between viscosity and temperature. As the C-SiO 2 content was 41% (w/w) and the mass ratio of PAA:CaCl 2 :C-SiO 2 was 3:1:10, the CS-STF displayed a double-thickening behavior, and the peak viscosity reached 1330 Pa·s at 35 °C. From the yarn pull-out test, the inter-yarn force was significantly increased with the increasing CS-STF content. Treating UHMWPE fabrics with CS-STF improved the impact resistance effectively. In the blunt impact test, the U-CS fabrics with high CS-STF content (121.45 wt%) experienced penetration failure under high impact energy (18 J) due to stress concentration caused by the shear thickening behavior. The knife stabbing test demonstrated that U-CS fabrics with appropriate content (88.38 wt%) have the best stabbing resistance in various impact energies. Overall, this study proposed a high-performence STF showing double-thickening and enhancing shear-thickening behavior at a wide temperature range, the composite fabrics with the performance of resisting both the blunt and stab impact had broad application prospects in the field of personal protection.
研究领域:
材料科学
·
力学
·
防护工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）