JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2025
·Vol. 40
·期 3
·842-851
·
IF 1.1
Zhu Yongfei,Li Yuxuan,Xiao Jianrui,Li Jiayi,Yu Shujuan
Separating oil/water mixtures via superhydrophobic stainless steel mesh (SSM) is a kind of efficient methods of treating oily wastewater, and the superhydrophobic SSM with a low cost, simple fabrication process and robust usability remains a challenge. Herein, urushiol-based benzoxazine (U-D) with a strong substrate adhesion and low surface free energy was used to anchor SiO 2 particles on the SSM surface to obtain a durable superhydrophobic SSM (PU-D/SiO 2 /SSM) through a simple dip-coating process, meanwhile, epoxy resin was also introduced to further improve the adhesion between coating and SSM. PU-D/SiO 2 /SSM could successfully separate various immiscible oil-water mixtures with a separation efficiency of over 96% and a flux up to 27 100 L/m 2 h only by gravity, respectively. Especially, the modified SSM could effectively remove water from water-in-oil emulsion with a separation efficiency of 99.7%. Moreover, PU-D/SiO 2 /SSM had an outstanding reusability, whose water contact angle and separation efficiency only slightly decreased after 20 cycles of separating oil/water mixture. In addition, the modified SSM also displayed a satisfactory abrasion resistance, chemical stability and self-cleaning property. Thereby, the robust PU-D/SiO 2 /SSM prepared by cheap raw materials and facile dip-coating method exhibits a high potential for separating oil/water mixtures.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Zhenhao Yao,Yichen Jing,Jianan Song,Kan Zhang
Multifunctional polymer-based composites with enhanced thermal conductivity are indispensable for achieving advancements in both scientific research and technological innovation. This paper reports a new type of polybenzoxazine/graphene (PBZ/GN) thermal conductive composite. Specifically, GN forms a continuous thermal conductive network by coating resin monomer powder and then undergoing hot-pressing curing. Upon incorporating 10 wt% GN, the PBZ composite exhibited distinct anisotropic thermal conductivities of 0.82 W/m K in the through-plane direction and 1.96 W/m K along the in-plane orientation. Compared with pure PBZ, these values represent increases of 1.6- and 5.3-fold, respectively. The composite material exhibits enhanced thermal stability as GN content increases. However, the mechanical properties exhibit an initial increase followed by a decrease. Notably, with the addition of 2 wt% GN, the tensile strength and flexural strength increase by 75.4% and 41%, respectively. This composite material can be prepared in a simple and highly efficient manner. Consequently, this advancement broadens the applicability of benzoxazine resins, especially in fields requiring high thermal stability and heat dissipation. Highlights A graphene network was designed to enhance composite properties. Enhanced thermomechanical properties achieved through graphene-induced thermal conduction networks. Peak strength gains (75.4% tensile/41% flexural) achieved with adding 2 wt.% graphene.
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
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Xiangkang Cao,Guangyi Cai,Yicong Wang,Jinglong Pan,Xinxin Zhang,Zehua Dong
Polybenzoxazine (PBZ) is a kind of high corrosion-resistant polymer, however, the brittleness and weak adhesion strength of PBZ have puzzled their applications. In this work, we introduced ether amine molecules into benzoxazine monomers via molecule design, and then copolymerized them with tannic acid (TA) to realize flexible PB-TA coating systems, aiming at achieving durable corrosion and abrasion protection for steel structures. It is found that the PB-TA copolymer gains favorable plasticity up to 39.44 % elongation. Meanwhile, TA provides more active sites and stronger hydrogen bond interaction, which increases the crosslinking density of PB-TA coating and achieves a high adhesion strength (13.57 MPa) to the mild steel substrate. Further experiments evidence that the PB-6TA coating (with 6 % mass of TA addition in the PBZ) presents high corrosion resistance (>10 9 Ω.cm 2 after 600 h salt spraying test), far beyond polyurethane and epoxy resin coatings. Also, the PB-6TA coating exhibits a higher anti-friction ability during cyclic wear corrosion test than the pristine PBZ coating. It is expected that this work may help boost the development of polybenzoxazine-based coatings with long-term corrosion resistance in harsh marine environments.
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
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2018
·Vol. 219
·期 6
·1700517
·
IF 2.492
Yang Zhao,Yazhen Xu,Qingbo Xu,Feiya Fu,Yanyan Zhang,Takeshi Endo,Xiangdong Liu
Two commercially available amines, octanediamine (ODM) and m -xylylenediamine (MXDM), are chosen for tough polybenzoxazine resin due to their controllable capability to cause phase separation during the copolymerization with benzoxazine monomers. The toughening behavior and phase separation of the cured resins are investigated using tensile tests and analyses of dynamic mechanical analysis (DMA), scanning electron microscope, and thermal gravimetry–gas chromatography/mass spectroscopy. The resulting networks show remarkable toughness without obvious degradation in thermomechanical performance. Especially, when ODM/MXDM molar ratio is 1:1, an elongation rate of 10.55% and a breaking strength of 82.67 Mpa, which are 86% and 128% higher than that of the neat benzoxazine resin, respectively, are achieved. These findings open a new way to improve toughness of brittle polybenzoxazine resins.
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
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2019
·
IF 6.282
Abdul Qadeer Dayo,Aijaz Ahmed Babar,Qi-rui Qin,Sadia Kiran,Jun Wang,Ahmer Hussain Shah,Abdeldjalil Zegaoui,Hamid Abdelhafid Ghouti,Wen-bin Liu
In the current study, three different kinds of hemp fibre treated polybenzoxazine composites were exposed to accelerated weathering at 30 °C and 80% relative humidity (RH), till the saturated moisture uptake. The tensile, flexural, and impact properties of saturated samples were evaluated and results were compared with the unconditioned samples. The silane treated hemp fibre (STHF) composites showed the lowest decline in the properties. Afterwards, the STHF composites were exposed to various accelerated weathering conditions, in the range of 25–35 °C and 40–80% RH. Moisture uptake was slightly increased and tensile and flexural properties were gradually decreased as the exposure temperature and RH were increased. Highest decline was observed in the samples exposed at 35 °C and 80% RH. Furthermore, the slightly higher impact values were observed for the exposed composites. The composites colour was slightly lost and changes to lower shaded as the temperature and RH were raised.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULES
·
2018
·
IF 5.914
Xiaobin Shen,Lijun Cao,Yuan Liu,Jinyue Dai,Xiaoqing Liu,Jin Zhu,Shiyu Du
The formation of intra- or intermolecular hydrogen bonding and their influences on polybenzoxazine’s properties were investigated after the model benzoxazine monomers (o-AB-fbz, o-AF-fbz, o-AP-fbz, p-AB-fbz, p-AF-fbz, p-AP-fbz) were synthesized. Because of the different electron-donating abilities of bridging units (benzene, furan and pyridine) in isophthalic acid (IPA), 2,5-furandicarboxylic acid (2,5-FDCA) and 2,6-pyridinedicarboxylic acid (2,6-PDCA), the strength of intramolecular H-bonding involved with the oxygen atom in oxazine ring in o-AB-fbz, o-AF-fbz and o-AP-fbz followed the order of o-AB-fbz > o-AF-fbz > o-AP-fbz, and the strength of the overall H-bonding was arranged as follows: o-AB-fbz < o-AF-fbz < o-AP-fbz. While more intermolecular H-bonding was formed in p-AB-fbz and p-AF-fbz as well as p-AP-fbz. DSC and FT-IR results discovered the relationship between the H-bonding involved with the oxygen atom in oxazine ring and the curing activities of benzoxazines. After curing reaction, the cured systems showed varied glass transition temperature (Tg), and the influence of H-bonding on Tg was revealed by in situ FT-IR analysis. Molecular dynamics (MD) simulation was also applied to investigate the properties of synthesized polybenzoxazines and similar results were obtained. Not only the formation of H-bonding but also their effects on both the curing behaviors of benzoxazine monomers and the thermal properties of cured resins were systematically investigated, which would help us understand polybenzoxazines more deeply and might be a guideline for improving their comprehensive properties only by manipulating the H-bonding.
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
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Xiangkang Cao,Jinglong Pan,Guangyi Cai,Song Xiao,Xiaoze Ma,Xinxin Zhang,Zehua Dong
The decaying mechanism of air cushion on superhydrophobic surfaces deserves further investigation upon immersion conditions, which could contribute to a clear understanding to the non-wettability deterioration process. In this work, we constructed a chemically robust and self-healing superhydrophobic coating by spraying method of polybenzoxazine (PBA) particles and polydimethylsiloxane (PDMS) paste, without further modification by low surface-energy and toxic fluorocarbon resin. The size of PBA particles was regulated by adjusting the ball-milling rate to obtain a mixture of micro-nano particles, then the PBA particles were blended with PDMS and sprayed on a mild steel plate to fabricate all-organic superhydrophobic coatings. Laser confocal microscope and FT-IR spectra verified that the hierarchical micro-nano topography on PBA/PDMS coatings contributed more than the low surface-energy modification to the superhydrophobicity. Even after the superhydrophobicity of PBA/PDMS coating was damaged due to deterioration of the micro-nano structures, it could be easily healed by surface friction on the PBA/PDMS coatings thanks to its three-dimensional superhydrophobic property. Visualization monitoring on the air cushion trapped on PBA/PDMS coatings demonstrated that it failed from several points initially, then expanding to local up to the whole surface finally. It is expected that this work may provide a promising fabrication strategy of superhydrophobic coatings, as well as a preliminary understanding of the mechanism of superhydrophobicity loss.
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 Advances
·
2023
·Vol. 4
·期 7
·1671-1677
·
IF 5
Yi Xu,Xinyue Sun,Keqi Zhu,Shumin Xu,Changhui Liu,Shenghua Xiong,Chao Li
Oily wastewater and oil spills pose a threat to the environment and human health, and absorbing these harmful organics through porous aerogel materials is an efficient method for oil/water separation. Herein, we design degradable, hydrophobic, and mechanical 4,4′-methylenedianiline polybenzoxazine/silicone-based polyhexahydrotriazine aerogels (BOZ/Si-PHT) for efficient oil/water separation. The BOZ/Si-PHT interpenetrating network (IPN) aerogels were successfully prepared by sequential polymerization, followed by atmospheric drying without any additional post-processing. The as-prepared BOZ/Si-PHT aerogels exhibit prosperous hydrophobicity (a water contact angle of 121.5°) and good mechanical properties (a compressive strength of 449.6 kPa). Meanwhile, the BOZ/Si-PHT aerogels possess good absorption capacity of oils or organic solvents ranging from 4.6 to 16.3 times their own weights. More importantly, the BOZ/Si-PHT aerogels show rapid degradation after use. This work provides simple, environmentally friendly and sustainable materials for oil/water separation and the rationally designed hydrophobic BOZ/Si-PHT aerogels display enormous potential for practical applications dealing with oily wastewater and oil spills.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 7
·1147
·
IF 3.4
Yue Guo,Xuhui Chen,Guorong Wu,Shiwen Huang
In this study, a series of composites comprising polyether ether ketone (PEEK) and carbon fiber (CF)-reinforced polybenzoxazine for high-temperature friction materials for vehicle brake applications were developed using a high-temperature compression molding technique. The objective of this research was to systematically investigate the thermal, mechanical (tensile and flexural), and tribological performance of friction materials made from polybenzoxazine-based composites by varying the PEEK/CF mass ratio. Our study reveals the substantial improvement effect of the increased content of PEEK fibers on the thermal conductivity, the coefficient of friction, and the friction strength of the polybenzoxazine-based composite materials. Meanwhile, the introduction of carbon fibers was found to have a monotonic positive effect on the mechanical (tensile and flexural) properties and wear performance of the polybenzoxazine-based composites. The polybenzoxazine-based composites exhibit high mechanical strength, with a tensile strength of 50.1–78.6 MPa, Young’s modulus of 10.2–24.3 GPa, a flexural strength of 62.1–88.3 MPa, and a flexural modulus of 13.1–27.4 GPa. In addition, the polybenzoxazine-based composite with a PEEK/CF mass ratio of 75:25 exhibits a high and stable coefficient of friction (0.33) and a specific wear rate (1.79 × 10−7cm3/Nm at room temperature). Subsequent to the wear test at ambient temperature, the worn surfaces of five polybenzoxazine-based composite samples with various PEEK/CF mass ratios were studied using electron microscopy technology (SEM). The observation of small cracks and tiny grooves on the worn surfaces indicates a combined abrasive and adhesive wear mechanism of the material. Our experimental results clearly reveal superior mechanical properties and excellent tribological characteristics. As a result, these composites show promising potential for the application of friction materials in terms of vehicle braking system applications.Keywords:polybenzoxazine-based composite;PEEK;carbon fiber;friction material
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 Materials Chemistry A
·
2024
·
IF 10.7
Zhenhao Yao,Jianan Song,Yin Lu,Rui Yang,Yuan Zhang,Kan Zhang
The increasing demand for integrated and miniaturized electronic components requires the simplified production of high-performance and versatile nanocomposites. Herein a novel approach for obtaining graphene/thermoset composites with switchable properties was proposed via smart structural rearrangement of graphene/thermosetting resin hybrids. Specifically, highly oriented layered graphene composite sheets were successfully constructed by using the vacuum-assisted self-assembly method. Besides, an amide and furan functional benzoxazine resin was synthesized and used as an interlayer adhesive for consolidating the brick/mortar-like graphene/thermoset composites. The additional thermal treatment facilitated the chemical conversion of polybenzoxazine into polybenzoxazole networks, which significantly enhances the interface interaction between the polymeric matrix and graphene nanosheets. Notably, the newly obtained brick/mortar-like graphene/thermoset composites showed exceptionally high thermal conductivity (47.8 W m−1 K−1), remarkable toughness, and outstanding electromagnetic shielding effectiveness (48.4 dB), suggesting their high potential applications in the fields of electronics, military, and aerospace.
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
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Zeyu Li,Yunyun Xiao,Saihui Liu,Jinlong Zhou,Sizhao Zhang,Liangjun Li,Jian Feng,Guihua Tang
Polybenzoxazine (PBz) aerogels have garnered considerable attention as an innovative and excellent thermal insulation material, celebrated for its lightweight, low thermal conductivity, and outstanding mechanical properties. However, the use of high boiling point toxic solvents in the preparation process requires a cumbersome solvent exchange procedure coupled with insufficient flame-retardant properties, which hinder the potential application of PBz aerogels. Herein, we employed tetraethyl orthosilicate (TEOS) into PBz using an easy, eco-friendly, and cost-less process to achieve hybrid structure polybenzoxazine/silica (PBz/SiO 2 ) aerogels, by thermal catalysis (72 °C) ring-opening polymerization and polycondensation in water-ethanol solvent without any catalysts. The resulting PBz/SiO 2 aerogels were characterized with low density (0.181 g/cm 3 ), low thermal conductivity (0.0315 W/(m·K)), excellent flame-retardancy (PHRR value of 32.3 W/g and THR value of 6.3 kJ/g), and superhydrophobicity (the water contact angle up to 155°). Environment-friendly preparation strategy for the PBz/SiO 2 aerogels with excellent comprehensive performance, poised to play a pivotal role in energy-saving buildings and fire-resistant applications.
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
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Shichao Xu,Xiaoyu Yang,Yanju Lu,Liang Yuan,Tianyu Zhu,Shuping Huo,Yuxiang Chen
Polybenzoxazines (PBozs) are regarded as prime candidates as low dielectric matrixes. However, the fabrication of high-performance PBozs that combines low dielectric property with high thermal stability using sustainable resources as the starting raw materials remains a significant challenge. In this work, we constructed a novel main-chain benzoxazine (Boz) oligomer from natural essential oil-derived compounds (eugenol and p -menthane diamine) to fulfill the principles of green chemistry. To enhance their low dielectric properties, polar C-Si unit on the main-chain and cellular structure of polyoctahedral silsesquioxanes (POSS) as the cross-linkers were introduced in PBoz-POSS composites. The obtained composites demonstrated excellent thermal stability, mechanical property, and with remarkable low dielectric constants . Coupled with their exceptional hydrophobicity and heat resistance, these materials are promising matrixes for low dielectric application in contemporary electronic industries.
研究领域:
材料科学
·
化学工程
·
电子工程
✓ 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）