CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Mengjie Han,Nana Zhao,Chen Zhou,Weiqi Liu,Fukang Hao,Jinfeng Yuan,Zhicheng Pan,Mingwang Pan
Thermal insulation coating is one of the key methods to mitigate energy consumption, while waterborne polyurethane (WPU) foaming coating is demonstrating great application potential in various thermal insulation fields due to its excellent flexibility, adhesion, and environmental friendliness. However, the inherent low viscosity and no crosslinking in WPU pose a mismatching problem between system viscosity and foaming rate to result in foaming difficult. To address this challenge, we propose a physical-chemical hybrid nano-microfoaming strategy, in which utilizing organic siloxane hydrolysis-condensation in situ generating polysilsesquioxane smoothly encapsulates polymerizable monomer and blowing agent and then is introduced into WPU. The nanocomposite particles serve as both foaming agent and viscosity enhancer, effectively aligning viscosity with foaming rate, and also act as a reinforcing filler, significantly improving the mechanical properties of the foaming coatings. Furthermore, a balance of viscosity and foaming rate is achieved with the aid of the optimized redox process and the nanoparticles synergistic effect, realizing a multi-faceted coating with thermal conductivity of 0.0318 W m −1 K −1 . This nano-microfoaming technology provides a new approach and design idea for developing thermal insulation multifunctional coatings.
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DOI
高影响因子
Advanced Science
·
2025
·
IF 14.1
Xu Fu,Yizhou Shen,Lingfeng Zhao,Weixin Zhu,Weilan Liu,Chenliang Li,Yuebin Lin,Zongsheng Ye,Chengfeng Shen
Aircraft confronting harsh meteorological conditions and radar detection environments during high-altitude flights face significant risks, which can threaten flight safety. This study designs and fabricates a novel Jerusalem cross-inspired Frequency Selective Surface (FSS). Initially, rGO powder with an optimized reduction degree is synthesized as the conductive filler. Based on this, the rGO/WPU electrothermal coating is prepared using the spraying method, demonstrating excellent electrical conductivity and electrothermal performance. Subsequently, a New Jerusalem Pattern Structure (NJPS) is engineered on the coating surface. This patterned design notably improved microwave transmittance. Parameter optimization ensured superior wave transmission performance, with the underlying mechanism explained through antisymmetric surface current analysis. Laser-engraved NJPS samples are tested under both room-temperature and low-temperature conditions, confirming dual functionality: effective Joule heating and stable broadband transmission. Importantly, icing wind tunnel tests under simulated flight conditions verified the de-icing capability within 216s via interfacial water-film lubrication. This patterning strategy establishes a viable methodology for reconciling electrothermal de-icing and electromagnetic transparency on aircraft surfaces.
研究领域:
材料科学
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航空航天工程
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功能高分子材料
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电磁学
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热力学
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Zhongji Qu,Yu Wang,Wei Wang,Dan Yu
The fabrication of flexible microwave absorbers with high-performance has become an arduous challenge for applications of anti-electromagnetic pollution and radar stealth technology. Herein, a series of FeCoNiOx-PDA-rGO absorbers were prepared and coated on the surface of pretreated polyimide (PI) fabric with PDA-rGO, and finally by screen printing FeCoNiOx-PDA-rGO/WPU for acquiring robust microwave absorption performance, in which the first layer of treated PI fabric was used as the microwave-reflection layer, the medium microwave absorbing powder and water-based polyurethane (WPU) hybrid coating served as the microwave-absorbing layer, and the outside hydrophobic polydimethylsiloxane (PDMS) layer was utilized as the microwave-transmission layer. The well-designed microwave absorption fabric exhibits excellent performance in the X-band (8.2–12.4 GHz). The minimum reflection loss (RL min ) value of the designed fabric can reach −74.70 dB with a thickness of 3.97 mm. Meantime, almost in the entire X-band, the sample can absorb more than 99% (RL < -20 dB) of incident electromagnetic waves. Besides, the performance can be adjusted by changing the load rate of each microwave absorbing layer to obtain lighter and thinner samples in practical applications. We believe this work will bring new inspiration to the design of flexible and wearable microwave absorbers.
研究领域:
材料科学
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电磁学
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柔性电子
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复合材料
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DOI
高影响因子
Biomaterials Science
·
2021
·Vol. 9
·期 22
·7504-7521
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IF 6.843
Jiatao Zhang,Junyi Yang,Qiuying Li,Jie Ding,Liangjun Liu,Tong Sun,Hehe Li
Fabrication of anti-wetting coatings with anti-biofouling and anti-biofilm properties has become a hot spot of attention in recent years. However, the anti-biofilm mechanism of anti-bacterial adhesion coatings with different wet resistance properties has not been explored in detail. In this work, SiOx micro–nano particles were prepared by the Stöber method and were in situ modified. The SiOx/waterborne polyurethane (WPU) coatings were prepared by the drop coating method, and the coatings with different hydrophobic and oleophobic properties were constructed by modifying the process conditions using SiOx micro–nano particles as the roughness construction factor. Taking the dominant spoilage bacteria of aquatic products, Shewanella putrefaciens as the object, the anti-bacterial adhesion properties and anti-biofilm mechanism of the SiOx/WPU coatings were investigated. The results show that, with the unmodified SiOx particles increasing from 1.2% (w/V) to 4.0% (w/V), the hydrophobicity and thermal stability of the SiOx/WPU coatings are significantly enhanced, but the oil repellency becomes worse due to the mesoporous structure. After SiOx micro–nano particles are modified with 1H,1H,2H,2H-perfluorooctyl trichlorosilane (PFOTS), the surface energy of the SiOx/WPU coatings is decreased, the liquid repellency is improved, and the surfaces are rough with the appearance of fluorocarbon compounds, but the thermal stabilities are slightly reduced. Among them, after the secondary modification of SiOx micro–nano particles, the SiOx/WPU coatings showed excellent oil repellency, lower surface energies and higher fluorocarbon content on the surface. Particularly, SiOx/WPU coatings exhibited super-amphiphobicity after adjusting the amount of concentrated ammonia added during the secondary modification process. Meanwhile, we found that for the hydrophobic SiOx/WPU coatings, the stronger the oleophobic property, the greater the anti-bacterial adhesion ability is, while the anti-bacterial adhesion ability of hydrophobic and selectively oleophobic or superhydrophobic and oleophobic SiOx/WPU coatings is poor than that of amphiphilic SiOx/WPU coatings. However, because the super-amphiphobic SiOx/WPU coatings can be in the Cassie state with the bacterial solution for a long time, it can “capture” enough air to inhibit the irreversible adhesion of the bacteria. More importantly, the coatings can also inhibit the metabolic activity, secretion of extracellular polysaccharides, and activities of ATPase and AKP of the adherent bacteria, so it has a better anti-biofilm property. The anti-biofilm coatings can be used as food packaging materials or coated on the inner surface of packaging boxes to prevent the microbial infection.
研究领域:
材料科学
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生物材料
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涂层技术
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微生物学
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食品科学
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DOI
PubMed
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2023
·
IF 7.4
Wei Chen,Zewen Wu,Yuxuan Xie,Xingyang He,Ying Su,Yiliang Qin,Dingding Tang,Sang-Keun Oh
Bio-based waterborne polyurethane (WPU) using renewable resources has grown with the increasing scarcity of petroleum resources and people’s awareness of sustainable development and environmental protection. The unfavorable physicochemical properties hinder its further development in the field of concrete protective coatings, also the bonding mechanism between the Bio-based WPU and cementitious materials has little scientific backing. In this work, the environmentally benign bio-based WPU was synthesized by employing soybean oil as the initial raw material, which was prepared by prepolymer method through a series of chemical reactions of epoxidation, hydroxylation and stepwise polymerization. The chemical cross-linking of γ-aminopropyltriethoxysilane(APTES) combined with physical reinforcement of nano-SiO 2 strategy was used for the composite modification. The particle size of emulsion, molecular structure, water resistance, tensile and thermal properties, microstructures of the Bio-based WPU were investigated by DLS nanoparticle size measurement, Fourier transform infrared spectroscopy (FT-IR), universal mechanical testing, water immersion, differential scanning calorimetry (DSC) and thermogravimetric analysis (TG), scanning electron microscopy (SEM) respectively. The results shows that the APTES has been successfully grafted into the Bio-based WPU chain and the nano-SiO 2 was dispersed homogeneously in the WPU matrix. The Si-O of with low surface energy introduced to the Bio-based WPU by APTES cross-linking and the favourable interfacial covalent bonding between the nano-SiO 2 and Bio-based WPU have a synergistic effect in enhancing the water resistance, tensile strength and thermal stability. The pull-off testing shows the cement and interfacial mixed failure was the primary failure mode, the bonding strength of the composite modified Bio-based WPU shows an increasing trend with increasing content of nano-SiO 2 , which increases by 206.56 % to reach 1.87 MPa compared with Bio-based WPU without modification. The interfacial bonding mechanism of SiO 2 -SiWPU composite film with cementitious materials are mechanical interlocking effect, coordination bonding, hydrogen bonding and electrostatic adsorption, demonstrating the Bio-based WPU organic–inorganic composites coating can be a promising candidate for concrete protecting.
研究领域:
材料科学
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化学工程
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土木工程
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DOI
高影响因子
POLYMER BULLETIN
·
2026
·Vol. 83
·期 6
·299
·
IF 4.2
Song Kangjia,Liu Jie,Zhang Feifei,Lu Aide,Jin Liqiang,Zhao Zecui,Nian Xinyue,Song Jianan,Zhu Deyi
To mitigate plastic pollution and reduce reliance on fossil fuels, the development of high-performance polymeric coatings from renewable resources to mitigate plastic pollution and reduce reliance on fossil fuels remains a critical challenge. Among them, substituting petroleum-based isocyanates with bio-based 1,5-pentanediisocyanate (PDI) not only significantly reduces the carbon footprint but also provides a key green feedstock for developing high-performance biodegradable polyurethanes. In this study, bio-based poly (lactic acid) polyol (PLA) and PDI were utilized as the raw materials. By incorporating polytetramethylene glycol (PTMEG) into the soft segment of waterborne polyurethane (WPU), a series of PLA/PDI bio-based waterborne polyurethanes (PP-WPU-Ts) were synthesized. The results demonstrate that PP-WPU-3 (n PLA : n PTMEG = 5:5) achieved a high bio-based content of 53.1 wt% along with a balanced combination of mechanical properties, including a tensile strength of 4.02 MPa, an elongation at break of 1118.6%, and a toughness of 26.7 MJ/m 3 . Additionally, PP-WPU-3 exhibited outstanding wear and yellowing resistance, reaching 80,000 abrasion cycles and a grade 1 yellowing resistance (ΔE = 2.8). Most importantly, the material exhibited controllable degradation across various environments: rapid disintegration in alkaline media (65% weight loss in 6 h), efficient biodegradation in soil (54.3% in 120 days), and synergistic mineralization by Bacillus sp. (19.3% in 15 days), offering a promising end-of-life solution. The optimized PP-WPU-3 possesses balanced mechanical properties while also exhibiting excellent yellowing resistance and degradation capabilities. These characteristics validate its potential as an eco-friendly alternative for organic coatings.
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高影响因子
DIAMOND AND RELATED MATERIALS
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2018
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IF 2.232
Liutong Hou,Ming Zhou,Shiyu Wang
A novel waterborne polyurethane (WPU) nanocomposite modified by composite fillers consists of amine-modified multiwall carbon nanotube (NH 2 -MCNT) and carbon black (CB) has been successfully prepared in this study. IR spectra of the nanocomposites indicated that there were interfacial interactions between the hard segments of PU chains and the filler particles . Thermal properties showed that added composite fillers raised the thermal stability of nanocomposites and glass transition temperature of hard segments (Tg-H), which was probably due to the uniformly dispersed filler particles, increased crosslink density of composites and the strong interfacial interactions between the fillers and WPU matrix evidenced by SEM and TEM microphotographs . Furthermore, the other properties of nanocomposite coatings were evaluated by contact angle measuring system and potentiodynamic polarization measurements. The results indicated that the fillers strengthened the hydrophobicity of the nanocomposites coatings and enhanced the resistance to corrosion.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 26
·15913-15923
·
IF 10.733
Jun-Hong Pu,Xing Zhao,Xiang-Jun Zha,Lu Bai,Kai Ke,Rui-Ying Bao,Zheng-Ying Liu,Ming-Bo Yang,Wei Yang
The development of wearable healthcare electronics has created higher demands on both the sensitivity and stretchability of flexible sensors. As it is generally difficult to obtain a trade-off between sensitivity and stretchability, the fabrication of strain sensors with both a wide operating range (≥100%) and high sensitivity (GF ≥ 100) remains a great challenge. Here, we propose for the first time a strategy based on the consolidation of two basic but seemingly paradoxical sensing mechanisms, i.e., slippage and crack propagation mechanisms, to greatly enhance the sensitivity of stretchable strain sensors. Based on stretchable polyurethane (PU) fibers, which can be easily woven into conventional fabrics to produce wearable devices, we present a multilayer sensing structured fiber sensor fabricated by layer-by-layer self-assembly of sliver nanowire (AgNW)/waterborne polyurethane (WPU) layers and MXene layers. The sensor simultaneously exhibits an ultrahigh sensitivity (GF = 1.6 × 107) and a wide operating range (up to 100%), as well as great reliability and stability (1000 cycles) and fast response (344 ms) and relaxation (344 ms). Moreover, smart fabrics were fabricated by integrating fiber strain sensors into different clothes and a prototype body posture monitoring, analysis, and correction system was presented for healthcare applications. Our work not only breaks down the technological wall between high sensitivity and high stretchability of strain sensors, but also shows the great potential applications of wearable, comfortable, and non-intrusive electronics for real-time health monitoring.
研究领域:
柔性电子学
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可穿戴传感器
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纳米材料
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医疗健康技术
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智能纺织品
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2025
·
IF 7.3
Wenling Wu,Xuan Zhang,Anding Shao,Gang Zhen,Yang Cheng,Xiangfei Wang,Jianfeng Zhu,Hongjie Luo
The corrosion of ancient bronze relics and protection measures after excavation are of great importance to the study of historical and cultural heritage. At present, the bionic superhydrophobic surface anticorrosive coating is one of the main anticorrosive measures of bronze cultural relics. It aims to construct a barrier to prevent the contact between corrosive media and bronze to reduce the invasion of corrosive media. However, due to structural defects such as micropores in a single organic coating, corrosive media (O2, Cl–, and H2O) can penetrate the coating to the metal matrix. Nanomaterials such as MXenes and metal–organic frameworks (MOFs) can fill structural defects such as microholes and microcracks of the coating, thereby improving the density of the coating. Therefore, to improve the performance of organic waterborne polyurethane (WPU) coatings with good chemical protection, nanomaterial ZIF-8/Ti3C2Tx was introduced based on the organic–inorganic hybrid theory. Finally, the coating was modified by 1H,1H,2H,2H-perfluorodecyltriethoxysilane, and the organic–inorganic composite coating was prepared. Characterizations of the composite coating were performed via Fourier transform infrared spectroscopy, X-ray diffraction, Brunauer–Emmett–Teller method, field-emission scanning electron microscopy/energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. Colorimetric measurements and reversibility experiments of the coating were also evidenced. According to the electrochemical impedance spectroscopy assessments, the |Z|0.01 Hz value of the F-WPU@ZIF-8/Ti3C2Tx composite coating in a 3.5 wt % NaCl solution, which was higher compared to other composite coatings. Moreover, the icorr value of the F-WPU@ZIF-8/Ti3C2Tx (3.344 × 10–6 A cm–2) composite coating is reduced by 2 orders of magnitude compared with F-WPU@ZIF-8 and F-WPU@Ti3C2Tx coatings. As a result, this organic–inorganic F-WPU@ZIF-8/Ti3C2Tx composite coating has good anticorrosion properties to bronze without causing an obvious color difference change and has potential application prospects in various metal material fields.
研究领域:
材料科学
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文物保护
·
电化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Jiaqi Li,Fengqing Zhang,Haibin Nu,Chao Zhou,Guangfeng Wu
Flexible strain sensors capable of detecting minute mechanical signals and easily adaptable to various irregular surfaces have garnered significant interest for applications in structural health monitoring, early detection, and failure prevention. As state-of-the-art smart materials, these flexible strain sensors should possess highly sensitive sensing capabilities, prolonged durability, and the ability to self-repair. In this study, 1,8-diamino-P-menthane (MD) is incorporated into a waterborne polyurethane (WPU) backbone to induce a microphase separation structure that balances mechanical properties while enhancing self-healing capabilities through hydrogen bonding. Consequently, a blend of self-healing WPU, MXene, and AgNW was employed to fabricate composite conductors featuring an asymmetric continuum structure that exhibits exceptional electrical conductivity and self-healing properties. The distinctive laminate architecture of MXene enables the sensitive detection of signals generated by both bending and tensile deformation (up to 400 %).
研究领域:
材料科学
·
传感器技术
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DOI
高影响因子
APPLIED THERMAL ENGINEERING
·
2025
·
IF 6.9
Xianghuang Zhou,Yizhou Shen,Zhen Wang,Jiawei Jiang,Senyun Liu,Weilan Liu,Yuebin Lin
Electrothermal anti-/de-icing technology is considered to be an effective means of solving the icing problem on the composite surface of multi-electric/pure-electric vehicle in the future. The electrothermal coating with carbon nanotube concentration gradient was fabricated by the multi-step spraying method, which obviously increased the rate of electric heating by inducing directional heat transfer. The coating temperature remained above 0 ℃ under various low-temperature incoming conditions, when the electric power density as low as 0.4 W/cm 2 . Meanwhile, the concentration gradient coating’s excellent adhesion and electrothermal stability ensured its long service life. Moreover, the surface temperature of the coating on the airfoil model increased rapidly to over 50 ℃ within 180 s at an initial electrical power density of 1.2 W/cm 2 , effectively preventing ice formation on the leading edge for 60 s under −15 °C, 30 m/s flow condition. Under the same conditions, 8.5 mm-thick ice on the leading edge could be swiftly removed within 22 s with initial electrical power density of 1.8 W/cm 2 . This strategy of conductive packing gradient design will provide new insights for advanced electrothermal anti-/de-icing material manufacturing.
研究领域:
材料科学
·
航空工程
·
能源技术
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Chuanle Xie,Wenwen Liu,Ju Li,Lingyu Sun,Fujun Xu,Yantao Gao,Zan Lu,Wei Liu
The rapid development of flexible electronics has intensified the demand for strain sensors that simultaneously achieve high sensitivity, wide detection range, and exceptional durability, particularly in human activity monitoring applications. In order to overcome the intrinsic sensitivity─stretchability trade-off in conventional resistive sensors, this work proposes a carbon nanotube (CNT)/waterborne polyurethane (WPU) composite fiber strain sensor featuring a layer-by-layer structure fabricated via a novel wet-pulling method. The synergistic interaction between the self-folding hierarchical layered structure, formed via the wet-pulling method, and surface crack engineering enables an ultrahigh gauge factor (GF = 117222.64) across a wide working range (243.78% strain). This synergy ensures both a rapid dynamic response (60 ms response time, 80 ms relaxation time) and excellent cyclic stability (>6000 cycles). With a CNT content of 28.62% and an electrical conductivity of 369.36 ± 67.99 S·m–1, the fiber accurately monitors subtle physiological signals (e.g., pulse and swallowing) and large-scale joint movements. Moreover, the device exhibits potential for applications in encrypted message transmission. This work establishes a scalable, cost-effective strategy for developing next-generation wearable sensors that integrate high performance with long-term reliability.
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DOI
PubMed
高影响因子
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