Polymers
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2023
·Vol. 15
·期 21
·4215
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IF 5
Guixiang Chen,Zhenhang He,Zhen Liu,Xin Li,Zhengyin Yao,Peng Zhang
Paper-based thermoelectric (PTE) generators have recently emerged as a green technology that can help alleviate environment pollution and the energy crisis. In this work, a PTE generator was prepared by coating a post-treatment-free thermoelectric ink consisting of poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate (PEDOT:PSS) doped with 1-ethyl-3-methylimidazolium:tricyanomethanide (EMIM:TCM) onto the card paper. By tuning the molar concentration of the EMIM:TCM to 0.17 M and with hot-pressing, the PTE generator showed a decent power factor (PF) value of 6.82 μW m−1K−2, which was higher than the values of PTE in the literature. This phenomenon could be attributed to the synergistic effect of high-performance thermoelectric ink (i.e., PF = 175 μW m−1K−2when deposited on glass slide) and the hot-pressing. The hot-pressing enhanced the packing density of cellulose fibers and the associated PEDOT:PSS hybrid, which enabled the formation of long-range conductive paths. In addition, the PTE had good mechanical stability, indicated by no significant change of the power factor values after cyclic folding 10,000 times. Moreover, the structure of as-prepared PTE could be easily tuned into different shapes that are promising for the preparation of flexible wearable thermoelectric generators.Keywords:paper-based thermoelectric;PEDOT:PSS;hierarchical structure;mechanical stability
研究领域:
材料科学
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能源技术
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DOI
PubMed
高影响因子
CORROSION SCIENCE
·
2019
·
IF 6.355
Binbin Zhang,Weichen Xu,Qingjun Zhu,Yuanyuan Sun,Yantao Li
Given the widely usage and corrosion tendency of AA5083, it is crucial and highly desired to transform intrinsically hydrophilic AA5083 to be water-repellent superhydrophobicity. In this paper, we constructed porous anodized AA5083 and achieved superhydrophobicity by fluorosilane self-assembly. The surface topography, roughness and chemical compositions were investigated by SEM, AFM and XPS. The corrosion-resisting behavior was revealed by EIS, demonstrating prominent improvement of corrosion resistance. In addition, the superhydrophobic AA5083 exhibits ultralow adhesion force, excellent self-cleaning and mechanical stability. We greatly anticipate the construction of superhydrophobic surfaces with mechanical robustness on AA5083 will effectively broaden its promising applications.
研究领域:
材料科学
·
表面工程
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产品关联
DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2020
·Vol. 217
·期 15
·1901035
·
IF 1.759
Shaoping Chen,Yanzuo Chen,Saneyuki Ohno,Libin Xu,Wenhao Fan,Lin Xue,Marhoun Ferhat,Yucheng Wu
The phase component and its evolution during aging at the joint between thermoelectric (TE) materials and electrodes are of much importance to the quality and the performance of the TE devices. While the figure of merit zT of TE materials determines the maximum efficiency of TE devices, undesired side reactions causing the growing interfacial resistance or mechanical failures between TEs and metal electrodes limit the actual performance of devices. Herein, the candidate electrode materials (Mg 2 Ni and Mg 2 SiNi 3 ) for Mg 2 Si are explored, which is one of the cost-effective and environmentally friendly TE materials exhibiting high zT . The electrodes are directly bonded to Mg 2 Si by field-activated pressure-Assisted sintering (FAPAS) in one-step process. The interfaces of fabricated joints with different sintering times are monitored by electron microscopy, followed by the measurement of shear strength and the contact resistances. Outperforming strength (28.29 MPa) and contact resistance (63 μΩ cm 2 ) are observed with Mg 2 SiNi 3 at the joint bonded for 30 min. A long-term stability test on Mg 2 SiNi 3 /Mg 2 Si joint reveals a minute increase in the contact resistance as well as sufficient mechanical stability, suggesting that Mg 2 SiNi 3 is a great candidate of the electrode materials for Mg 2 Si.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
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2023
·
IF 29.4
Xin Zhang,Tian Yin,Jianping Ge
Thermochromic photonic crystals are promising materials for thermal printing due to their unfaded colors under chemical/illuminated environments and the absence of toxic chemicals. However, the slow thermochromic response, the multistep printing procedures, the use of inks or developing liquids, and the requirement of expensive parts in printers limit their applications. Here, a thermochromic polyurethane/hydrophobic-SiO 2 photonic crystal/paraffin (PU/HPO-SiO 2 -PC/Para) film with an integrated multilayer structure is fabricated for all-solid-state and single-step thermal printing that is fully compatible with commercial printers. The fast thermochromic response in milliseconds enables high-resolution and grayscale printing as the paraffin infiltration and the color change can be finely controlled in a microscale range. The integrated and hydrophobic multilayer structure renders the thermochromic film good stability in daily liquids, which addresses the long-existing concern of print fading. Meanwhile, the integrated multilayer structure also enhances the mechanical stability when it is deposited on fibrous paper so that people can fold, cut, or staple the thermal papers, and make notes confidently in practical usage.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Haoxiang Chen,Feifei Su,Zhonghe Wang,Congxiang Li,Zhihong Fan,Dongfang Zhang,Guoqiang Liu,Huaiyin Chen
Superhydrophobic coatings show great application prospect in various fields such as corrosion protection, anti-icing, waterproof and oil-water separation, due to their unique properties. However, the poor mechanical stability and the preparation complexity severely limit their practical application. In this study, superhydrophobic epoxy coatings with excellent mechanical stability were facilely constructed based on fluoridation modification of amine curing agent and TiO 2 nanoparticles. Epoxy curing agent, diethyltriamine, was fluorinated by the reaction with heptafluorobutyric acid to obtain the required low surface energy. Meanwhile, fluorinated TiO 2 nanoparticles were prepared through the reaction with 1 H,1 H,2 H,2H-perfluorooctanetriethoxysilane and further used for generating the roughness. The properties of the coatings were adjusted by the addition amount ratio of TiO 2 nanoparticles to epoxy resin. The performance tests of water wetting, abrasion resistance, and corrosion resistance of the coatings were carried out. The results show that the hydrophobicity of epoxy coating is greatly improved after fluoridation modification of amine curing agent, and the greater the amount ratio fluorinated TiO 2 nanoparticles to epoxy resin, the higher hydrophobicity of the modified coating. The modified coating prepared under optimal conditions displays excellent abrasion resistance, self-cleaning and anti-corrosion performances. The electrochemical impedance spectroscopy tests in 3.5 wt% NaCl solution reveal that the hydrophobically modified epoxy coating has the largest charge transfer resistance, which is 8 orders of magnitude larger than that of uncoated Q235 steel. This work provides a simple method for preparation of superhydrophobic epoxy coatings with excellent mechanical stability, and will enlighten researchers to develop more superhydrophobic coatings and their applications.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Xuehua Ruan,Xinfang Zhang,Xuhang Liao,Xiaobin Jiang,Yan Dai,Xiaoming Yan,Gaohong He
Zeolitic imidazolate framework-8 (ZIF-8) with regular pore size (~ 0.34 nm) is widely attempted for gas separation membranes based on size sieving. However, the prospect is subjected to fabricating the continuous ZIF-8 membranes with high mechanical stability and uniformity. In response, an adhesive layer of Zn(II)-doped polydopamine (Zn-PDA) is pre-coated on the stainless steel nets in this work to improve ZIF-8 nucleation and growth. Zn-PDA layer shows high tolerance to ultrasonic agitation and heated methanol (system for ZIF-8 synthesis), little dissolution within 24 h, which supplies a high stable surface for ZIF-8 growth. Furthermore, the Zn(II) doped in PDA layer is opportunely serving as the even-distributed ZIF-8 nucleation starting sites, verified with the EDX and FE-SEM images for the aggregated Zn(II) clusters and the nascent ZIF-8 crystals. Therefore, an indented and hinged boundary is constructed between ZIF-8 and substrate to enhance the mechanical stability. The FE-SEM images after ultrasonic agitation show that the continuous ZIF-8 membranes prepared on Zn-PDA layers can tolerate the deformation to a certain extent. Finally, the prepared ZIF-8 membranes behave excellently with α H2/CO2 = 9.9, α H2/CO = 17.2, α H2/CH4 = 26.0, and permeation rate J H2 = 3980 GPU. This work supplied a useful approach to enhance mechanical stability and uniformity of defect-free ZIF-8 membranes.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2021
·
IF 8.198
Xiangyu Tang,Wei Huang,Yanjun Xie,Zefang Xiao,Haigang Wang,Daxin Liang,Jian Li,Yonggui Wang
The research of using bio-based nanocellulose to construct novel structures with tailored functions has attracted wide attention over the past few years. Unlike most of the studies starting with hydrophilic nanoscaled cellulose, undecenoate cellulose esters (UCEs) with different degrees of substitution (DSs) are used in this report to construct (super)hydrophobic coatings. UCE1.9 with a DS of 1.9 is composed of spherical nanoparticles (NPs), which have an average size of 112.8 nm. A crystalline cellulose core is present within UCE1.9 according to solid-state 13C nuclear magnetic resonance (NMR) spectroscopy. Self-assembly turned UCE1.9 NPs into microparticles (MPs) via a solvent-exchange process. The self-assembled UCE1.9 MPs dispersed in ethanol are well distributed on diverse substrates by spray coating to form superhydrophobic surfaces with micro/nanoscale hierarchical structures, which showed static water contact angles larger than 150° and sliding angles less than 10°. The prepared superhydrophobic surface holds its original superhydrophobicity when exposed to acidic or alkaline conditions and high temperatures. Moreover, UCE3 NPs constructed by UCE3 molecule chains with a DS of 3 tremendously enhanced the mechanical stability after addition into UCE1.9 MPs coatings, which was evaluated through sandpaper rubbing and tape peeling tests. Thus, these novel (super)hydrophobic coatings derived from sustainable cellulose are promising candidates for constructing biodegradable superhydrophobic materials.
研究领域:
材料科学
·
纳米技术
·
可持续发展
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Xuewu Li,Shaomeng Du,Chenghu Ma,Tian Shi,Wei Qi,Hejie Yang
Improving the corrosion resistance of widely used Al alloys is important for expanding their industrial and marine applications. Structural fragility and preparation cost have always been key factors for restricting anticorrosive application of extensively-reported superhydrophobic surface. In order to try and fight that, combining with polyurethane (PU) adhesion agent, 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTES) was encapsulated around nano-SiO 2 ceramics for robust coating in place of conventional structure preparation strategy on Al alloy surface. Such low-cost one-step air-spraying SiO 2 @PFDTES@PU coating was prepared by 0.03 g nano-SiO 2 ceramics addition, 100 μL PFDTES and 0.25 g PU with the highest water contact angle of 168.34° ± 2.72°, a rolling angle of 4.02° ± 2.08°, and a propylene glycol oil contact angle of 156.52° ± 3.35°. FE-SEM, laser confocal microscopy, EDS and XPS were used to investigate micro-nano morphology and chemical composition of the coating. Meanwhile, the electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements showed that as-prepared coating exhibited larger capacitive arc diameter, enhanced charge transfer resistance, larger |Z| 0.01Hz value, positive shifting E corr and significantly reduced I corr , thus demonstrating a significantly improved corrosion resistance. In addition, sandpaper friction experiment was used to evaluate the mechanical stability of the fabricated superhydrophobic coating. Ultimately, its resistance to solid/liquid contamination and self-cleaning ability were also systematically assessed. This work provides strong technical supports for industrial and marine applications for such low-cost, wear-resistant and anti-corrosion coating.
研究领域:
材料科学
·
表面工程
·
腐蚀防护
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Hua Liu,Xiaohui Liu,Lingzhi Wang,Birong Zeng,Qingyun Zhao,Weiang Luo,Yiting Xu,Conghui Yuan,Lizong Dai
Despite being the earliest and most extensively studied class of vitrimers, transesterification epoxy (EP) vitrimers still face some large limitations in thermomechanical stability and flammability. Unlike the preparation of functional composite materials using ordinary curing agent compounds and nano fillers, this paper proposed a new strategy of using carbon dots to design nano-curing agents and dynamically crosslink active sites for constructing epoxy vitrimers with excellent thermomechanical stability and flame retardancy. Herein carboxylic acid type carbon dots (C-CDs) was synthesized via glutamate pyrolysis, subsequently grafting with organophosphorus compounds via the Kabachnik-Fields reaction to achieve the phosphorus doping (P-CDs). It is interesting that the synthesized P-CDs played a quadruple role as flame retardants, curing agents, dynamically exchangeable bonds, and nano-reinforcement effect. The results showed that this new kind of organic-inorganic hybrid flame-retardant EP/CDs vitrimers was firstly reported, which exhibited good thermomechanical stability, flame retardancy and fast stress relaxation time. When the molar ratio of P-CDs to epoxy was about 1:1, the peak heat release rate (PHRR) and CO2 production (CO2P) of the EP/P-CDs could be reduced by 53.4 %, and 65.1 %. The limiting oxygen index (LOI) was 31.3 % and the UL-94 grade reached V-0 rating, which benefitted from the dual-phase flame-retardant mechanisms. Furthermore, the stress relaxation time of EP/P-CDs was significantly shortened to be 90 s, which was important for the reprocessing of epoxy thermosets. Notably, EP/P-CDs maintained up to 98 % of its thermo-mechanical properties even after twice reprocessing. This kind of organic-inorganic hybrid flame-retardant EP/CDs vitrimers will have imposing potential applications in many fields.
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
LANGMUIR
·
2024
·
IF 3.7
Chuanhao Sun,Xin Dai,Zhiguang Guo
Regular array structures prepared by laser processing and three-dimensional printing have promising applications in building stable superhydrophobic structures. However, the size of the materials processed by these two methods is affected by the size of the processing equipment, which prevents the processing of large-size materials. In this paper, a columnar unit consisting of a spherical structure with similar mechanical stability to the array structure is designed and prepared for metal surface protection. A convenient electrodeposition method was used to deposit a layer of columnar micron-sized copper consisting of spheres on the surface of a 6061 aluminum alloy. Subsequently, modified ZrO2 nanoparticles and polytetrafluoroethylene (PTFE) were sprayed on the surface to form a superhydrophobic surface with synergistic columnar units and ZrO2 (CAZ). The structure was tested and found to have excellent mechanical stability, maintaining the superhydrophobic properties of the surface even after 200 abrasion cycles of 1000-grit sandpaper under a 500 g load. Moreover, the vertical deformation of the CAZ sample under normal pressure was increased by a factor of 4 compared to the original substrate. Importantly, in subsequent corrosion resistance tests, the CAZ samples showed a two-order-of-magnitude improvement in self-corrosion current density and impedance modulus at low frequencies compared to the original substrate. This strategy is an effective method for preparing mechanically stable superhydrophobic structures that are low-cost and large enough to provide long-term protection for metal surfaces. It is particularly suitable for surface protection of instruments and automotive chassis armor.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xiaoyu Huang,Luofei Li,Haoqi Zhu,Tiancheng Lv,Lei Tang,Zhexian Shentu,Haoyue Li,Tian Gao,Kai Zhang,Juntao Hu,Wei Wang,Bin Xue,Hai Lei,Yi Cao
Developing damping materials that are both optically transparent and mechanically robust, while offering broad frequency damping capacity, is a significant challenge─particularly for devices that require protection without compromising visual clarity. Conventional methods often either fail to maintain transparency or involve complex designs that are difficult to implement. Here, we present an ionogel system that integrates a physically cross-linked elastic copolymer network with a viscous ionic liquid. The competitive interactions between the ionic liquid and the polymer network enable fine-tuning of the mechanical stability and damping capacity. The resulting ionogel is transparent and mechanically robust and exhibits excellent damping over a wide frequency range. Remarkably, a thin layer (0.15 mm) absorbs nearly 60% of the impact force and retains its performance after exposure to extreme conditions. This approach offers a straightforward method for designing advanced damping materials that meet both the aesthetic and functional demands of modern technologies.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Qiaoyin Li,Aijie Ma,Yuxiang Zhang,Wei Gao,Hongwei Zhou
Superhydrophobic materials have attracted significant attention for their exceptional surface wettability. However, their short service life limits their application in practical anti-corrosion engineering. Magnesium alloys exhibit numerous unique properties but suffer from poor corrosion resistance. To enable the widespread use of magnesium alloys, it is crucial to develop effective anti-corrosion strategies. In this study, a mechanically stable superhydrophobic material was developed using siloxane-modified SiO₂ combined with an adhesive. Test results showed that the contact angle of this superhydrophobic material reached 160° and demonstrated excellent mechanical stability and antifouling properties. Even after 60 cycles of tape adhesion-peeling tests, the contact angle was remained above 150°. In addition, we used an epoxy resin (EP) coating as a primer and sprayed this superhydrophobic material on its surface to prepare a dual-layer coating for the anti-corrosion of magnesium alloys. The coating retained outstanding anti-corrosion performance after immersion in a 3.5 % NaCl solution for 30 days, with impedance values two orders of magnitude higher than those of the pure EP coating. The combination of superhydrophobic material and EP coating provides durable and effective protection for magnesium alloys. We believe that this method presents a promising approach for designing novel anti-corrosion coatings.
研究领域:
材料科学
·
腐蚀与防护
✓ 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）