CHEMICAL PHYSICS
·
2025
·
IF 2.4
Yan Liu,Xuebin Zhou,Zhihua Ying,Yuan Jiang
Nitrogen dioxide (NO 2 ) detection is critical for environmental and industrial safety, yet existing sensors often suffer from limited sensitivity and slow response. To address this, we report a facile one-step hydrothermal synthesis of ZnO/SnO 2 heterostructures via a one-step hydrothermal method using cellulose nanofiber (CNF) as a templating agent. Under UV activation, the optimized composite demonstrates a high response value of 45 toward 3 ppm NO 2 , along with rapid response and recovery times of 15 s and 20 s, respectively. The CNF-assisted synthesis significantly enhanced NO 2 sensitivity and selectivity compared to conventional methods, attributed to synergistic effects of increased surface area and interfacial charge transfer. This scalable approach enables high-performance NO 2 sensors for real-time monitoring.
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COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Jinbang Han,Xiuzhong Zhu,Li Tian,Naishuo Yan,Jinjie Zang,Haitao Zhang,Lei Wang,Fengshan Zhang
Exploiting inexpensive, bio-derived lignin as a partial replacement for petroleum-based polyols offers a sustainable pathway to high-value lignin applications. However, prior studies have mainly focused on lignin's reinforcing effects in elastomers, neglecting its potential photothermal properties. Lignin-modified waterborne polyurethane elastomers (LWPUxAy) were synthesized, demonstrating UV resistance, enhanced mechanical robustness, rapid light-controlled self-healing, and photothermal weldability. LWPUxAy exhibited exceptional mechanical properties (51.9 MPa tensile strength, 768.8 % elongation) and a significantly enhanced photothermal conversion efficiency due to Ag + ligand bonding. Upon near-infrared (NIR) irradiation (1.25 W/cm 2 ), LWPUxAy rapidly reached a surface temperature exceeding 160 °C within 35 s. The synthesized LWPUxAy demonstrated rapid, light-controlled self-healing and notable welding performance under near-infrared (NIR) irradiation (0.6 W/cm 2 , 5 min). Furthermore, LWPUx effectively blocked the entire UV spectrum within the 200–400 nm range. Bio-derived lignin was incorporated into light-responsive polyurethane elastomers, resulting in enhanced tensile strength and self-healing efficiency.
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Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 1
·1-12
·
IF 23.2
Guan Yanhua,He Haodong,Tang Dexi,Guo Pengfei,Han Xiaoqin,Zhang Haixia,Xu Jiayun,Dai Lin,Huang Zhanhua,Si Chuanling
Perovskite solar cells (PSCs) have become a promising solar energy utilization technology due to their high energy conversion efficiency and low preparation cost. However, the inherent instability under UV illumination limits their practical applications. In this work, we developed a new approach to fabricate functional cellulose paper (FTH paper) with high transparency, high haze, and UV-blocking, which can be used to extend the lifespan of PSCs. When the impregnation amounts of carboxymethyl cellulose and tannic acid were 16 wt% and 0.7 wt%, the light transmittance and UV-blocking performance reached 86.8% (at 600 nm) and 83.1% (at 320 nm), respectively, while maintaining a haze of 71.5%. After protonation and desalination treatment, the FTH paper exhibited good water resistance and mechanical properties (71.49 MPa, 2156 folding cycles). More importantly, FTH paper coating can significantly improve optical path length and the UV-stability (improved by 26% after 100 h) of PSCs. This study not only provides a simple and effective strategy to improve the properties of PSCs but also opens the way for high-value utilization of paper materials.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Weirui Zhang,Xiaofeng Cui,Wenjing Ji,Ming Huang,Na Zhang,Liwei Mi,Xianhu Liu
Thermoplastic polyurethane (TPU), with high strength and elasticity, is widely used in wind turbine blade protection. However, it struggles to resist particle erosion and UV aging in desert environments. In this study, UV-327 (A), UV-531 (B), and HALS622 (M) were combined to prepare UV-resistant UV-TPU/NW (ABM) film. The three anti-UV agents cover the main wavelengths, forming a three-dimensional protective network of “UV absorption, free radical scavenging, and cyclic regeneration.” ABM film shows tensile strength 39.71 MPa and elongation 935.48%, comparable to pure TPU (39.52 MPa, 939.58%). After 10 days of UV aging, the color difference (ΔE) and yellowness index (ΔYI) of ABM are 12.88 and 24.25, respectively, significantly lower than those of pure TPU (ΔE = 24.74, ΔYI = 47.69). After 20 days of UV aging, ABM film only has a few fine cracks on the surface, and the tensile strength and elongation at break remain at 31.50 MPa and 868.35%, respectively, much higher than those of pure TPU (17.66 MPa, 706.53%), with a low erosion rate of 1.52% (pure TPU 2.67%). Meanwhile, UV-TPU/(NW@G/C 1.0 ) electrothermal film based on ABM maintains a steady-state temperature of 81.16°C under 11 V after 20 days of aging. This demonstrates its potential for anti-icing applications on wind turbine blades.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shanlei Chang,Kai Rong,Yuchen Wang,Zhixuan Yu,Junfeng Zhai,Hongwei Tian,Youxing Fang,Shaojun Dong
Specific applications of gels can raise multiple demands, including low cost, elasticity, adaptability to wide temperature ranges, conductivity, and reduced hazards, thereby presenting diverse challenges for one material. Deep eutectic solvents (DESs) offer unexpected solutions to tackling the challenging task. Here, we mixed anhydrous diallyldimethylammonium chloride (DMDAAC) and urea to synthesize a polymerizable DES with a wide range of solubility. It can polymerize to form versatile DES gel upon photoinitiation. The gel exhibited high transparency (∼94 %), a wide range of temperature tolerance (−40 ∼ 100 °C), outstanding elastic properties (ε > 2400 %), good conductivity (0.05 mS·cm −1 ) and self-healing capability. The pristine gel film was successfully applied to motion sensors, while the DES gel with lignin was also employed as an elastic anti-UV film. Moreover, its water-solubility and non-hazardous compositions suggest the minimize environmental impact of the DES gel. This polymerizable DES can not only boost the development of electronic devices like motion sensors, but also inspire more creative ideas in promising applications of DESs and DES gels.
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PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Xin Lai,Jianfeng Hu,Jinqing Qu
The self-healing coating loaded with corrosion inhibitors has been proven to protect metals against harsh corrosive environments . However, the complex stimulation methods and inability to resist ultraviolet (UV) radiation greatly limit the further application of these coatings in intelligent corrosion protection . In this work, a self-healing epoxy (EP) coating activated by sunlight with photothermal conversion and UV resistance performances is developed by incorporating benzotriazole (BTA) and polydopamine-modified cerium oxide (mCeO 2 ) loaded poly (ε-caprolactone) (PCL) microspheres . BTA@PCL/mCeO 2 microspheres can not only endow composite coating with excellent anti-corrosion capability (|Z| 0.01Hz value of 1.97 × 10 9 Ω∙cm 2 ) but also achieve efficient photothermal self-healing under sunlight irradiation of 200 mW/cm 2 for 10 min. Based on the results of scanning electrochemical microscopy , the healing efficiency of composite coatings on scratched areas reaches 92.13 % after immersion for 24 h, which is much higher than 5.27 % of pure EP coatings. Profited from the UV absorption and free radical scavenging ability of BTA@PCL/mCeO 2 microspheres, the composite coatings still maintain stabilized impedance modulus values (3.62 × 10 8 Ω·cm 2 ) after 120 h of UV exposure. Therefore, this work offers a promising candidate for long-term corrosion protection under harsh application conditions.
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ChemistrySelect
·
2024
·Vol. 9
·期 30
·e202401714
·
IF 1.9
Honggang Jiang,Jiahui Chen,Jiajun Zou,Yanyan Cui,Jiaoyan Ai,Lina Song,Baohua Liu
Graphical In this paper, UV-curable resins prepared from diols (EG and BDO), isophorone diisocyanate (IPDI) and hydroxyethyl acrylate (HEA) are used to toughen bisphenol A-type epoxy acrylate (EA). The test of mechanical properties and coating properties shows that the toughness of EA is improved. UV-curable oligomers were synthesized by the reaction of ethylene glycol (EG) or 1,4-butanediol (BDO) with isophorone diisocyanate (IPDI), and then terminated with hydroxyethyl acrylate (HEA). The chemical structures and molecular weight of the two oligomers were analyzed by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance ( 1 H NMR and 13 C NMR) and high performance liquid chromatography (HPLC). The obtained UV-curable oligomers were separately mixed with bisphenol A-type epoxy acrylate (EA) in different mass ratios. The resulting mixture was then mixed with the active diluent tetrahydrofuran acrylate (THFA) and the photoinitiator ethyl 2,4,6-trimethylbenzoylphosphonate (TPO-L) for UV curing. The curing reactions were performed at UV light intensity of 120 mW/cm 2 . The unsaturation conversion was monitored by real-time infrared spectroscopy (real-time FT-IR). The mechanical properties and coating properties of the UV-cured products were analyzed. The results showed that the synthesized UV-curable oligomers had good toughening effect on EA, and the tensile strength of EA was also improved.
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POLYMER
·
2025
·
IF 4.5
Yuxiang Yi,Hongfei He,Lu Liu,Na Sun,Keqing Zhou,Xiaodong Qian,Congling Shi,Yuan Hu,Bin Yu
Owing to their superior environmental stability and conductivity, Ionogels have emerged as strong competitors to hydrogels in flexible conductive materials. However, their practical applications are hindered by inadequate mechanical properties. Herein, we report a mechanically robust ionogel synthesized via photo-initiated free radical polymerization of acrylamide (Am) and hydroxyethyl acrylate (HEA) in the ionic liquid 1-butyl-3-methylimidazolium dihydrogen phosphate ([BMIm][DHP]). The resulting Am-co-HEA ionogel exhibits a microphase-separated structure, achieving a maximum tensile strength of 17.41 ± 1.268 MPa. By modulating the content of ionic liquid, the ionogel demonstrates a synergistic enhancement of strength and toughness (tensile strength: 8.11 ± 0.34 MPa, elongation at break: 748 ± 111%) and favorable ionic conductivity (1.19 mS/m), alongside dual responsiveness to mechanical strain and temperature variations. Furthermore, the Am-co-HEA ionogel exhibits enhanced fire safety and can be applied as a flame-retardant and alarm-integrated multifunctional coating on wood surfaces. The ionogel coating enables wooden strips to achieve the UL-94 V-0 rating while elevating the LOI to 31%. Upon flame exposure, the coating rapidly responds to fire threats, thereby significantly improving the fire safety of combustible wood materials.
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DESALINATION
·
2017
·
IF 5.527
Mali Zhou,Xu Chen,Jiefeng Pan,Shanshan Yang,Bo Han,Lixin Xue,Jiangnan Shen,Congjie Gao,Bart Van der Bruggen
To improve the dimensional stability of electrodialysis membranes, a series of crosslinked sulphonated polysulfone cation exchange membranes with different degrees of sulfonation were prepared by a simple and low energy consumption method, namely UV-crosslinking. The crosslinking reaction was performed by UV irradiation and using 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide (TPO) as photoinitiator and trimethylolpropane tri-acrylate (TMPTA) as crosslinker . The scanning electron microscopy (SEM) and atomic force microscopy (AFM) results showed that crosslinking leads to a denser and smoother surface. Compared with the swelling and water uptake results of pristine membranes , the crosslinked membranes exhibited an enhanced dimensional stability, especially at higher temperature (40–70 °C). The thermogravimetric analysis and measurement of mechanical properties indicated that the crosslinked membrane has better mechanical and thermal properties. The electrochemical properties were analyzed, and the membrane after crosslinking showed a better ion permselectivity . When applied in electrodialysis and compared to the commercial membrane with a NaCl removal ratio of 75.6%, the crosslinked membranes showed a more efficient performance (NaCl removal ratio = 89.1% for SPSU-60). These improvements showed that the crosslinked membranes can be promising candidates for high-temperature and industrial application.
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高影响因子
POLYMER SCIENCE SERIES B
·
2014
·Vol. 56
·期 6
·855-862
·
IF 0.633
Li Hu,Liu Jingcheng,Lin Licheng,Mu Qidao,Sun Xiaoxia,Liu Xiaoya
tert -Butyl acrylate (TBA), benzyl methacrylate (BzMA) and acrylic acid (AA) were used to synthesize prepolymer (PTBA) with carboxyl pendant through free-radical polymerization. Glycidyl methacrylate (GMA) was then added to react with carboxylic acid group of PTBA to form UV-curable copolymer PTBA-G. Proton Nuclear magnetic resonance ( 1 H NMR) and Fourier transform infrared spectroscopy (FTIR) were used to confirm the structure and functional group of prepolymer and copolymer, GPC was employed to determine the molecular weight and polydispersity. Real-time infrared and photo differential scanning calorimetry (photo-DSC) were used to evaluate the UV-curable kinetics of copolymer, thermo-gravimetric analysis (TGA) showed the thermal stability of the copolymers increased as the GMA content increase. When the ratio of GMA and AA was 0.3, it showed excellent resolution of 50 μm by SEM observation.
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高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Shuo Wang,Xiaoling Huang,Luowei Pei,Xinyi Zhu,Songming Zhu,Ying Liu,Zhangying Ye
UV photo-electrocatalytic process has emerged as a promising approach for the abatement of ammonia nitrogen in wastewater. However, the radical chemistry for ammonia nitrogen removal in this process requires further clarification. The heterogeneous reaction pathways and mechanism of ammonia nitrogen oxidation in the UV photo-electrocatalytic process were investigated in this study. Photocurrents of the Ti/RuO 2 -IrO 2 -TiO 2 electrodes with good electrocatalytic behavior were enhanced by UV radiation. Compared with the electrocatalytic process, the removal rates of ammonia nitrogen were improved by 12.4%∼20% at the Cl − concentration of 50 mM in the photo-electrocatalytic process. The ammonia nitrogen was mainly transferred into N 2 , meanwhile, the formation of nitrogenous by-products, active chlorine, and chloramines was inhibited in the photo-electrocatalytic process. The contribution of UV radiation was to photo-decompose the active chlorine and chloramines, generating free radicals. The removal efficiency of ammonia nitrogen reached more than 64% after the elimination of free radicals. The electro-generated HOCl was the principal species for ammonia nitrogen removal, and the synergistic effect for the acceleration of ammonia nitrogen oxidation resulted from the photo-generated chlorine radicals. This investigation provides insight into the electrochemistry , photochemistry , and radical chemistry for the heterogeneous catalytic degradation of ammonia nitrogen by UV photo-electrocatalytic process.
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POLYMER BULLETIN
·
2018
·Vol. 76
·期 3
·1167-1182
·
IF 1.589
Wu Chengyi,Li Cong,Zhang Xu,Cheng Chao,Wang Jinshou
A novel pH-sensitive and macroporous NaAlg-based hydrogels were prepared, the monomers of which were N -methylolacrylamide (NMAAm) and acrylic acid, using N , N -methylene-bis-acrylamide (MBA) as a cross-linker, 2,2-dimethoxy-2-phenylacetophenone as a photoinitiator via ultraviolet irradiation. The morphology, thermal property and structure of hydrogel were characterized by Fourier transform infrared spectroscopy, scanning electron microscope, X-ray diffractometer and thermogravimetric analysis. The swelling ratios (SRs) of hydrogel were investigated in water, salt and pH solutions. The SR of hydrogel in water increased from 8.1 to 19.4 g/g with increase in weight of NaAlg from 0.2 to 1.0. The result indicated that hydrogel displayed favorable pH- and salt-sensitive. 5-fluorouracil (5-FU) as a model drug was loaded on hydrogel, the drug encapsulation efficiency of products reached to 85.2%, and the cumulative release rate of drug was 78.4 and 37% in the intestinal and gastric fluid, respectively. In addition, the dynamic data of drug release were evaluated by different mathematical models, and the experimental results revealed that it was more fitted to Ritger–Peppas and Higuchi equation models, correlation coefficients ( R 2 ) of which were up to 0.99.
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