ACS Applied Nano Materials
·
2026
·
IF 5.8
Yuan Yanru,Wang Yanxiang,Peng Xu,Guo Jinghe,Zhang Dong,Xu Ziyi,Gao Peiyi,Wang Xueqi,Zhang Can,Zhao Minchen
Flexible electronic devices require
electromagnetic interference
(EMI) shielding materials that combine effective shielding, mechanical
flexibility, and controlled surface reflection. However, highly conductive
Ti 3 C 2 T x MXene nanosheet
networks often induce excessive electromagnetic reflection, limiting
electromagnetic wave penetration and subsequent attenuation. To address
this limitation, a thickness-direction asymmetric bilayer architecture
was designed to reduce front-surface reflection and regulate electromagnetic
power distribution, rather than relying only on strong reflection
for EMI shielding. The bilayer consists of a Fe 3 O 4 /MXene/WPU incident layer with lower apparent electrical conductivity
and a MXene/WPU backing layer with higher apparent electrical conductivity
to regulate electromagnetic wave propagation and suppress transmission.
Nanometer-thick Ti 3 C 2 T x MXene nanosheets and Fe 3 O 4 nanoparticles
were incorporated into waterborne polyurethane (WPU), and the asymmetric
Fe 3 O 4 /MXene/WPU–MXene/WPU bilayer film
was fabricated by vacuum-assisted filtration and hot pressing. The
optimized FMW-M 15 film exhibited an X-band total shielding
effectiveness of 30.8 dB at a thickness of 60.0 ± 0.9 μm,
together with a tensile strength of 31.3 MPa and an elongation at
break of 192.5%. Under Fe 3 O 4 /MXene/WPU-side
incidence, the reflection, absorption, and transmission coefficients
were 0.7964, 0.2028, and <0.001, respectively. Reversing the incidence
direction increased reflection and reduced absorption, confirming
the direction-dependent electromagnetic response.
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DOI
高影响因子
INTEGRATED FERROELECTRICS
·
2016
·
IF 0.375
Yuguo Zhuo,Jun Liu,Qingshan Li,Bo Qiu,Guangzhong Xing
abstractWPU/CNT/GO nanocomposites were prepared with waterborne polyurethane (WPU), grapheme (GO) and carbon nanotubes (CNT) as main materials modified by (3-Aminopropyl) triethoxysilane (APTES). The morphologies and composite physical states were investigated using scanning electron microscopy (SEM), thermogravimetry analysis (TG) and fourier transform infrared spectroscopy (FTIR). Scanning electron microscopy observations revealed that modified GO had good compatibility with WPU whereas modified CNT had slight agglomeration. Results from FTIR and TG suggested that modified CNT and GO had been successfully introduced to the polyurethane molecular chain, when the ratio of CNT and GO was 1:2, thermal decomposition temperature of the composite films was increased by 30°C than pure WPU film, at the same time water resistance and mechanical properties of the composite films were obviously improved.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 23
·5159
·
IF 4.967
Yiqi Chen,Yujie Duan,Han Zhao,Kelan Liu,Yiqing Liu,Min Wu,Peng Lu
Bio-based porous materials can reduce energy consumption and environmental impact, and they have a possible application as packaging materials. In this study, a bio-based porous foam was prepared by using a Pickering emulsion as a template. Nisin and waterborne polyurethane (WPU) were used for physical modification of 2,2,6,6-tetramethyl piperidine-1-oxyl-oxidized cellulose nanocrystals (TOCNC). The obtained composite particles were applied as stabilizers for acrylated epoxidized soybean oil (AESO) Pickering emulsion. The stability of the emulsion was characterized by determination of the rheological properties and microscopic morphology of the emulsion. The emulsion stabilized by composite particles showed better stability compared to case when TOCNC were used. The porous foam was obtained by heating a composite-particles-stabilized Pickering emulsion at 90 °C for 2 h. SEM (scanning electron microscopy) images showed that the prepared foam had uniformly distributed pores. In addition, the thermal conductivity of the foam was 0.33 W/m·k, which was a significant decrease compared to the 3.92 W/m·k of the TOCNC foam. The introduction of nisin and WPU can reduce the thermal conductivity of the foam, and the physically modified, TOCNC-stabilized Pickering emulsion provides an effective means to preparing bio-based porous materials.Keywords:TOCNC/Nisin/WPU;Pickering emulsion;biomaterials;porous foam;thermal insulation
研究领域:
材料科学
·
生物学
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DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
·
IF 8.3
Chenglei He,Lingjun Zeng,Bai Xue,Xingxing Zhang,Liya Yu,Lan Xie,Qiang Zheng
Along with the increasingly serious electromagnetic interference (EMI) pollution, it is in urgent need of exploiting high-performance EMI shielding materials. However, the conventional experimental methods always require a series of tedious preparation and characterization processes, resulting in the long period and high cost. Herein, a fully connected neural network (FCNN) was applied to aid in exploiting silver nanowires/waterborne polyurethan/multi-walled carbon nanotubes (AgNWs/WPU/MWCNTs) EMI shielding aerogels with asymmetric structures to optimize new material evolution and reduce experiment burden. Firstly, the special AgNWs/WPU/MWCNTs aerogels were fabricated with various MWCNTs content (0 wt%, 2 wt%, and 4 wt%) and AgNWs mass (10 mg, 20 mg, 30 mg, and 40 mg) via a combination of directional freezing and spraying procedures, leading to 12 distinct samples. AgNWs/WPU/MWCNTs aerogels hold excellent EMI shielding properties and absorption-dominant shielding mechanism. The experimental EMI shielding effectiveness (SE) data at different frequency were leveraged to establish, train, and test the FCNN model based on Adam optimizer (Adam-FCNN). It is worth noting that Adam-FCNN model predictions are in good accordance with the EMI SE of the physically measured samples, with the lowest root mean square error RMSE of 0.7899, the highest correlation coefficient (R) of 0.9895, and excellent computational efficiency and reliability. Moreover, Adam-FCNN can accurately prognosticate EMI SE of unobtained AgNWs/WPU/MWCNTs aerogels in mechanics-intuitions to reduce repeated preparation and characterizing conditions. Thereby, Adam-FCNN soft model approach opens significant potential for alleviating the experimental burden, accelerating the discovery of innovative materials, and exploring the complex mechanism.
研究领域:
材料科学
·
人工智能辅助材料设计
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DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2021
·Vol. 30
·期 2
·528-540
·
IF 3.667
Wu GuangFeng,Song Xin,Yang ZhiHui,Li YingChun,Zhang HuiXuan
Polyester diol PCL and PBA, polyether diol PTMG and polycarbonate diol PCDL were used as components of WPU soft segment, respectively. Polyether PTMG-WPU has the worst hydrolytic property and the highest thermal stability. The maximum degradation rate temperature Tmax is 407.8 °C, the water contact angle reaches 89.5 °. Traditional polyester PCL-WPU shows the strongest hydrolysis performance, the smallest water contact angle, only 71.7 °, the water absorption rate of 72 h at room temperature is as high as 26.7%. However, the thermal stability of PCL-WPU is lower, the soft segment Tg is −52.3 °C, and Tmax is only 333.7 °C, but the mechanical property of which is the best, the tensile strength is 58.3 MPa, and the elongation at break reaches 857.9%. The most important thing is that the structure of polyester PCL-WPU is more easily destroyed by lipase and water molecules. The acidic products produced after hydrolysis will further promote the degradation of polyester. Therefore, compared with other WPUs, PCL-WPU has the best biodegradability and the most obvious degradation effect under the same conditions. The degradation rate of PTMG-WPU after 30 days of degradation in 0.6% lipase PBS buffer solution and soil was only 4.2% and 2.3%, while the highest degradation rate of traditional polyester PCL-WPU reached 41.7% and 32.0%, respectively. In addition, polycarbonate PCDL-WPU has the highest hardness, reaching 95.5 HD. But its other performances are lower than PCL-WPU.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2024
·
IF 5.9
Xiaozhuo Liu,Lingxiao Li,Min Wang,Binbin Zhang
The design of superhydrophobic materials based on zeolite imidazolate frameworks (ZIF) has attracted considerable attention due to their exceptional chemical stability, high specific surface area, and environmental friendliness. However, research in the fields of anti-corrosion and anti-icing remains in its infancy, and the mechanical stability of reported ZIF-based superhydrophobic surfaces is generally poor. In this study, we synthesized ZIF-8@PDA materials in an aqueous system and followed with stearic acid (STA) modification to achieve low surface energy, resulting in ZIF-8@PDA@STA. Subsequently, we applied a spray-coating method to sequentially construct WPU and ZIF-8@PDA@STA layer on aluminum alloy substrates, achieving a ZIF-8@PDA@STA/WPU superhydrophobic coating with exceptional mechanical stability. This coating retained its superhydrophobicity even after 5600 cm of abrasion distance. Furthermore, results from surface wettability, electrochemical and anti-icing tests demonstrated that the coated aluminum alloy exhibited excellent interfacial non-wetting, self-cleaning, anti-fouling, and significantly enhanced corrosion resistance and delayed icing properties. Additionally, the facile preparation of this coating on various substrates facilitates the large-scale application of such materials. The construction of this multifunctional ZIF-8 based superhydrophobic coating is expected to greatly expand the application of ZIF materials across diverse fields.
研究领域:
材料科学
·
表面化学
·
涂层技术
·
腐蚀科学
·
环境科学
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DOI
高影响因子
SENSORS
·
2024
·Vol. 24
·期 1
·271
·
IF 3.4
Junming Cao,Yuanqing Jiang,Xiaoming Li,Xueguang Yuan,Jinnan Zhang,Qi He,Fei Ye,Geng Luo,Shaohua Guo,Yangan Zhang,Qi Wang
Fiber-based flexible sensors have promising application potential in human motion and healthcare monitoring, owing to their merits of being lightweight, flexible, and easy to process. Now, high-performance elastic fiber-based strain sensors with high sensitivity, a large working range, and excellent durability are in great demand. Herein, we have easily and quickly prepared a highly sensitive and durable fiber-based strain sensor by dip coating a highly stretchable polyurethane (PU) elastic fiber in an MXene/waterborne polyurethane (WPU) dispersion solution. Benefiting from the electrostatic repulsion force between the negatively charged WPU and MXene sheets in the mixed solution, very homogeneous and stable MXene/WPU dispersion was successfully obtained, and the interconnected conducting networks were correspondingly formed in a coated MXene/WPU shell layer, which makes the as-prepared strain sensor exhibit a gauge factor of over 960, a large sensing range of over 90%, and a detection limit as low as 0.5% strain. As elastic fiber and mixed solution have the same polymer constitute, and tight bonding of the MXene/WPU conductive composite on PU fibers was achieved, enabling the as-prepared strain sensor to endure over 2500 stretching–releasing cycles and thus show good durability. Full-scale human motion detection was also performed by the strain sensor, and a body posture monitoring, analysis, and correction prototype system were developed via embedding the fiber-based strain sensors into sweaters, strongly indicating great application prospects in exercise, sports, and healthcare.
研究领域:
材料科学
·
生物医学工程
·
柔性电子
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产品关联
DOI
PubMed
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Bonan Ma,Wentao Jia,Qinlong Yang,Haibo Di,Enhui Yang,Yanjun Qiu
Modified emulsified asphalt is widely applied as a waterproof adhesive layer for bridge decks. However, the increasing prevalence of deck distress indicates that conventional formulations cannot satisfy the stringent durability requirements under complex service conditions. To overcome these limitations, a polymer-composite multi-component modified emulsified asphalt (PCMEA) binder with superior waterproofing and adhesion was developed. The modification mechanism was investigated using scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), fluorescence microscopy (FM), and Fourier transform infrared spectroscopy (FTIR), while hydrophobic characteristics were analyzed via 3D confocal imaging, SEM, and contact angle measurements. Results indicate that waterborne epoxy resin (WER) and waterborne polyurethane (WPU) form an interpenetrating polymer network through hydrogen bonding and molecular diffusion, integrating epoxy rigidity with polyurethane flexibility. The synergistic effects of poly(trifluoropropylmethylsiloxane) (PF), silica (SiO₂), and glass fiber (GF) further enhance surface energy regulation, mechanical strength, and toughness. PCMEA exhibits significantly improved hydrophobicity, with no water penetration under 0.3 MPa pressure. Mechanical tests confirm its high bonding strength, thermal stability, frost resistance, and corrosion resistance. This study elucidates the modification mechanism of polymer-composite emulsified asphalt and provides a feasible strategy for developing high-performance waterproof adhesive materials, offering valuable implications for extending bridge deck durability and mitigating pavement distresses.
研究领域:
材料科学
·
道路工程
·
高分子化学
·
土木工程
·
界面科学
·
防水材料
·
功能材料
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Huiyun Xia,Zeliang Wu,Wenshuo Zhang,Lifang Song,Xu Li,Liying Cui,Yanhui Niu
In this study, a BiOI/Bi 5 O 7 I photocatalyst is synthesized using a co-precipitation method. The degradation efficiency of NO can reach 70 % under visible light. Subsequently, water-based polyurethane is used as the film-forming matrix, and fluorinated silane is used as low surface energy components, a BiOI/Bi 5 O 7 I water-based polyurethane photocatalytic superhydrophobic coating (FBIU) is prepared by a layer-by-layer spraying technique. The high catalytic activity of BiOI/Bi 5 O 7 I comes from the heterojunction effect of the two semiconductors and the improved interface, which enables the degradation rate of NO to reach 76.9 %, accompanied by extremely low NO 2 conversion rate (<1 %). The wettability, chemical stability and mechanical stability of the FBIU coating are studied to investigate its impact on the long-term oxidative degradation performance of NO. And the self-cleaning characteristics and specific micro-nano structure of FBIU improve the wear resistance of the coating, manifested as a contact angle of 157.8° to water after 320 times of sandpaper polishing. Finally, based on the photocatalytic mechanism of BiOI/Bi 5 O 7 I semiconductor materials, a green long-term purification and degradation mechanism of NO by coatings is proposed. This can provide some insights into the design of air purification coatings for building exterior walls.
研究领域:
材料科学
·
环境科学
·
化学工程
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DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Wenfeng Luo,Jie Li,Jie Wang,Qi Liu,Bing Ren,Yang Cao,Jing Han,Yingchun Li
In recent years, conductive hydrogel based sensors have been widely used because of their flexibility and convenience, especially in strain sensing, handwriting recognition, object shape recognition and so on. In this research, the conductive hydrogel with “two-in-one” structure was well designed to avoid the agglomeration and leakage of liquid metal by using polyvinylpyrrolidone modified liquid gallium indium alloy/polydopamine composite hydrogel as the top layer and hydrogen bonding crosslinked waterborne polyurethane/poly(vinyl alcohol) composite hydrogel as the bottom layer, respectively. Finally, a hydrogel based sensor with excellent stretchability and sensitivity was successfully obtained. The tensile strength of the prepared composite hydrogel exceeded 2 MPa. The elongation at break could be greater than 500 %. The toughness was greatly improved due to the introduction of waterborne polyurethane , which was greater than 7.5 MJ/m 3 . The GF value of the sensors reached 4.54. More interestingly, the mechanical self-healing ability of composite hydrogel prepared by adding polydopamine, reached about 70 % of the original. The hydrogel based sensor was able to use for gesture recognition and controlling the manipulator in human-computer interaction. This research can provide a practical idea to achieve advanced intelligent wearable sensing.
研究领域:
材料科学
·
智能传感
·
生物医学工程
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Zhenya Wang,Haihang Luo,Li Wang,Heng Li,Yi Chen,Jun Xiang,Haojun Fan
Thermoplastic polyolefin (TPO) is widely used in automotive interior materials, but it has long been faced with the challenge of weak adhesion between water-based polyurethane (WPU) coating and substrate. Herein, chlorinated polypropylene (CPP) was grafted by styrene (St) firstly, then a water-based CPP adhesives with polar recognition both for non-polar TPO substrate and polar WPU coating were prepared via phase conversion methods, and the adhesives properties as well as the adhesive mechanism for different polar substrates were investigated. The introduction of polystyrene side-chain has improved the recognition ability of CPP adhesive to non-polar TPO substrate and the interaction force between interfaces. Compared with unmodified CPP adhesive, T-peeling strength of modified one has increased by 35 % and reached 24.2 N/cm, meeting the adhesive requirements of TPO as an automobile interior material. Adhesive mechanism study reveals that polar mutual recognition CPP adhesive plays a bridging role, one end recognizes the non-polar TPO substrate and another end recognizes the polar WPU surface coating , and forms a strong bond between the guest and the host through their respective interfacial force.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Minghao Li,Ye Zhang,Huiqi Shao,Guangwei Shao,Jinhua Jiang,Nanliang Chen,Jun Wang,Siyi Bi
Fabric-based electromagnetic wave (EMW) absorbers have attracted widespread attention due to their favorable flexibility. However, most fabric-based EMW absorbers are manufactured via surface coating on conventional fabric substrates, which not only confines the EMW-absorbing behaviors to the fabric exterior but also poses potential environmental hazards with the involvement of organic solvents during production. In this work, a green strategy is proposed for producing intrinsic EMW-absorbing fibers through an aqueous process, with the senary high-entropy layered double hydroxide integrating graphene oxide (GO@SHE-LDH) as a functional constituent and the sodium alginate (SA)-waterborne polyurethane (WPU) dual-network system as a fiber matrix. The GO@SHE-LDH/SA-WPU (GLSW) fibers are woven into plain-weave fabrics, exhibiting a minimum reflection loss (RLmin) of −69.6 dB and a maximum effective bandwidth (EABmax) of 7.1 GHz below 2.2 mm thickness, with favorable terahertz shielding/absorption performance (49.8 dB/45.6 dB) covering the 0.5–4.5 THz band, which is attributed to the synergistic EMW-absorbing effect of multiscale mechanisms. This work provides a promising eco-friendly method to produce functional fibers toward EMW absorption.
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）