EUROPEAN POLYMER JOURNAL
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2024
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IF 5.8
Haiyan Mao,Han Li,Xuemei He,Lingling Guo,Ling Lin,Ziyin Li
Wearable pH sensors can offer a visual warning signal of pH changes, making them particularly attractive in health monitoring and environmental detection. However, the fabrication of durable wearable pH sensors remains challenging due to the inevitable damage that sensors suffer in practical applications. Here, a durable pH responsive coating fabric with outstanding self-healing and recyclable capabilities is prepared with a composite film composed of a dynamic boroxine-polyurethane (BPU) and a pH responsive Congo red-based polymeric dye (CRPD). The BPU/CRPD composite film exhibits a high tensile strength of 17.46 MPa, breaking elongation of 407 %, toughness of 31.61 MJ/m 3 , Young’s modulus of 11.78 MPa, and outstanding elastic restorability. The high reversibility of boroxines and hydrogen bonds enable the composite film with healing efficiency of 87 % at 70 °C for 2 h and recycling efficiency of 97 % under 3 MPa at 80 °C for 5 min. In addition, the BPU/CRPD coated fabric presents outstanding pH responsive property and color fastness. Importantly, the scratched coating fabric can be easily healed at 70 °C, 5 MPa for 5 min or using an electric iron. Furthermore, the BPU/CRPD coatings on the discarded fabric can be recycled and reused many times with similar pH responsive behavior. The outstanding fastness, self-healing and recycling properties promote the durability of the pH responsive coating. This work provides a meaningful strategy for developing durable pH responsive coating fabrics with self-healing and recycling capabilities that will be promising for wearable pH sensors.
研究领域:
材料科学
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健康监测
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环境检测
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2024
·Vol. 25
·期 12
·6653
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IF 4.9
Lingxi Meng,Jian Jian,Dexing Yang,Yixiao Dan,Weijie Sun,Qiuhong Ai,Yusheng Zhang,Hu Zhou
Polyurethane/silk protein–bismuth halide oxide composite films were fabricated using a blending-wet phase transformationin situsynthesis method. The crystal structure, micromorphology, and optical properties were conducted using XRD, SEM, and UV-Vis DRS characterize techniques. The results indicated that loaded silk protein enhanced the hydrophilicity and pore structure of the polyurethane composite films. The active species BiOX were observed to grow as nanosheets with high dispersion on the internal skeleton and silk protein surface of the polyurethane–silk protein film. The photocatalytic efficiency of BiOX/PU-SF composite films was assessed through the degradation of Rhodamine B under visible light irradiation. Among the tested films, the BiOBr/PU-SF composite exhibited the highest removal rate of RhB at 98.9%, surpassing the removal rates of 93.7% for the BiOCl/PU-SF composite and 85.6% for the BiOI/PU-SF composite. Furthermore, an active species capture test indicated that superoxide radical (•O2−) and hole (h+) species played a predominant role in the photodegradation process.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
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2019
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IF 5.77
Yang Hua,Xueliang Li,Li Ma,Yihang Wang,Huagao Fang,Haibing Wei,Yunsheng Ding
A novel organic composite coating was successfully fabricated through in situ mineralizing in artificial seawater for a lasting anti-corrosive coating. The mineralized composite films make full use of the advantages including rich hydroxyl group and special ring structure of β-cyclodextrin as well as superior adhesion and high flexibility of waterborne polyurethane coating. The results show the β-CD remarkably promotes the mineralization of CaCO 3 on WPU substances through the effective adsorption and complexation of hydrophobic cavity to calcium ions. The dense organic-inorganic composite film exhibits outstanding anti-corrosive performance with corrosion rate of 1.39 × 10 −3 mm/year for 3CD-WPU sample, being much less than 7.36 × 10 −2 mm/year for WPU coating under same conditions. The excellent anti-corrosion performance is mainly attributed to the uniform nucleation site provided by CD-WPU and further formation of dense CaCO 3 film. Furthermore, the radial distribution function and adsorb energy theoretic analysis by molecular dynamic simulation definitely reveal and support the mechanism of β-CD promoting the CaCO 3 mineralization.
研究领域:
材料科学
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化学工程
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防腐蚀研究
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2023
·Vol. 141
·期 7
·e54960
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IF 3
Hongyan Liu,Siqi Zhan,Yanyan Bo,Wenhe Ding,Ruize Yuan,Zaiqian Yu,Yuting Zhang,Yuetong Sun,Longjiao Yu,Shiwei Wang,Mingyao Zhang
Laminated glasses have been widely used in buildings, physical protections, and vehicles because of their safety, sound insulation, thermal insulation, and other performance. In recent years, the high sound insulation performance of laminated glass intermediate films in the frequency range of low or high frequencies has attracted more and more attentions. In this work, a glass fiber/polyurethane elastomer composite (PU-MGF) film with high transparency and impact resistance has been successfully synthesized, 5 dB of the transmission loss increased at 1600–6000 Hz, and 3.6 dB increased at 63–1600 Hz compared with the control polyurethane film. This is a significant progress in the laminated glass industry. In addition, the transmittance of the composite reaches over 75%. The excellent impact resistance of the laminated glass, based on PU-MGF film, has been confirmed through falling ball impact test, demonstrating its ability to withstand multiple impacts without spattering. The PU-MGF film prepared in this work exhibits great potential for applications in building windows, transportation, and soundproof devices.
研究领域:
材料科学
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建筑工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Jiao He,Siyuan Zhang,Xinjian Cheng
Dendritic fiber nanosilica (DFNS) possesses a unique porous structure, and its potential application for adsorption and separation, particularly of heavy metals, should be explored. This study, to our knowledge, is the first time to introduce fluorescence recognition ability to DFNS and to combine it with polymer materials. Firstly, the fluorescent DFNS (FL-DFNS) was prepared by a Schiff base formation reaction between the naphthalamide fluorophore and the modified DFNS. Then, a two-step approach was employed to fabricate FL-DFNS/polyurethane (FL-DFNS/CSPU-02) nanocomposite materials. FL-DFNS functions as a “turn off” sensor for Hg 2+ /Hg + ions, exhibiting fluorescence quenching of up to 81.1 %/75.9 %. It also has an excellent adsorption capacity to mercury. Specifically, FL-DFNS/CSPU-02 membrane enabled portable detection of Hg 2+ /Hg + ions. Importantly, it exhibited superior performance in the adsorption and separation of Hg 2+ /Hg + ions, achieving a removal efficiency of 97.7 % and 98.0 %, with an absorption capacity of 382.4/373.5 µg/cm 2 . And it can be recycled for at least nine times. Overall, this study confirms the practical application value of FL-DFNS and FL-DFNS/CSPU-02 membrane in the recognition and removal of Hg 2+ /Hg + ions, it will achieve the real application in environmental science and engineering.
研究领域:
环境科学
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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
ELECTROCHIMICA ACTA
·
2014
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IF 4.086
Yunyun Zhai,Ke Xiao,Jianyong Yu,Bin Ding
ABSTRACT The performance of lithium ion battery based on electrospun nanofibrous membranes has gained a great deal of attention in the past decades, but the intrinsic low mechanical strength and large pore size of electrospun membranes limit their battery performance. To overcome this limitation, a powerful strategy for designing, fabricating and evaluating silica nanoparticles coated polyetherimide-polyurethane (SiO 2 /PEI-PU) nanofibrous composite membranes is easily developed via electrospinning followed by a dip-coating process. Benefiting from the high porosity, interpenetrating network structure and synergetic effect of PU, PEI and SiO 2 nanoparticles, the as-prepared composite membranes exhibit high ionic conductivity (2.33 mS cm −1 ), robust tensile strength (15.65 MPa) and improved safety (excellent thermal resistance and flame retardant property). Additionally, the as-prepared composite membranes possess relatively narrow pore size distribution with average pore size of 0.58 μm after coating SiO 2 nanoparticles, which plays an important role in hindering the micro-shorting and mitigating self-discharge. Significantly, the SiO 2 /PEI-PU membranes based Li/LiFePO 4 cell exhibits more excellent cycling stability with capacity retention of 98.7% after 50 cycles at 0.2 C rate and better rate capability compared with the Celgard membrane based cell. The results clearly demonstrate that this is a promising separator candidate for next-generation lithium ion batteries, which may represent a significant step toward separators with improved performance.
研究领域:
材料科学
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能源技术
✓ 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）