Materials Today Energy
·
2025
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IF 8.6
Yong Fan,Yifan Liu,Yiming Chen,Muhammad Shoaib,Tianhui Yu,Jun Luo,Xian Jian
Surface modification of carbon fluoride (CF x ) is one of typical methods to reduce polarization and enhance electrochemical discharge kinetics, in case of ultraviolet (UV) surface modified solid CF x powder, it faces the challenge of uneven issue. Herein, a uniform UV-inducing approach in dynamic alcoholic solution for macro CF x modification was developed to enhance the high rate performance. This approach possesses the advantage of good dispersibility and precise controllability of CF x particles, enabling large-scale preparation in kilogramme level (1∼3 kg per time). The UV-induced CF x displays the high energy density of 785.7 Wh kg -1 and ultrahigh-power density of 90580 W kg -1 at 70 C. The UV-inducing CF x with ultra-thin carbon layers (∼ 0.35 nm) has large specific surface area, abundant electrochemically active C-F bonds, enhanced electrical conductivity and reducing the energy barrier of Li + intercalation into CF x layers. These above synergistic effects supress the polarization, enhance the discharge kinetics behaviour, activate the CF x bond and increase the power density. This work provides a uniform and large-scale approach for Li/CF x primary batteries with ultra-high energy density as well as power density.
研究领域:
材料科学
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电化学
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DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 17
·e202400300
·
IF 1.9
Song Yang,Shengren Li,Yuyuan Xue
Graphical This work presents UV-induced Tetrahydrofuran (THF) etching lignin-based AgNPs, the use of water to regulate the oxidation ability of THF medium, controlling the conversion of lignin-based AgNPs to AgNWs, color-variable AgNPs, AgNPs precipitation, and rapidly release Ag + , to prepare multi-functional. Its application potential in conductive coatings, and enhanced antibacterial and product separation was tested. This study presents a novel approach for regulating the properties of lignin-based silver nanoparticles (AgNPs), which was UV-induced Tetrahydrofuran (THF) to form peroxide for the etching of these nanoparticles. The lignin coating was first degraded by oxidation, and the properties of the exposed AgNPs changed under etching. Notably, water can greatly regulate the oxidation capacity of the THF medium, thereby controlling the degradation degree of lignin coating and obtaining dissolution, aggregation, precipitation, and color-variable phenomena of AgNPs under the synergistic effect of UV irradiation and peroxide etching. By adjusting UV irradiation time, various functional products of silver nanowires (AgNWs), color-variable AgNPs, lignin-based AgNPs aggregates, and composite solution of Ag particles and Ag + were obtained. The transformation of these product properties is closely related to the oxidation capacity of H 2 O/THF medium. In addition, Multi-functional Lignin-based AgNPs show excellent application potential in conductive coating, antibacterial enhancement, and product separation, providing a promising avenue for the targeted utilization of lignin-based AgNPs.
研究领域:
材料科学
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化学工程
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环境科学
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DOI
高影响因子
TALANTA
·
2019
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IF 4.916
Qi Shu,Yue Wu,Lin Wang,Zhifeng Fu
As one of the most toxic chemical carcinogens, aflatoxin B1 (AFB1) has attracted extensive attention due to its severe impairment to human health. There exists urgent demand to develop facile and sensitive method for rapid screening of AFB1. Here magnetic beads modified with mouse monoclonal antibody (McAb) were adopted for capture and enrichment of the mycotoxin in sample matrix. Then UV radiation at 365 nm was utilized to induce the enhancement of fluorescent (FL) emission of the captured AFB1 with an addition reaction. The FL signal of the derivative at 435 nm was collected to quantify AFB1. The immunoassay method for AFB1 showed a wide detection range of 1.0–1000 ng mL −1 , with a low detection limit of 0.21 ng mL −1 (3σ). It was applied to detect AFB1 in herbal medicines including Astragalus membranaceus and Salvia Miltiorrhiza , with acceptable recovery values of 95.4–107.7%. It shows many merits including facile manipulation, low cost, high sensitivity and ideal selectivity. Due to its simple detection mechanism, the UV-induced FL derivatization-based label-free immunoassay can be furtherly extended to detection of other mycotoxins with similar chemical structures.
研究领域:
食品安全
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分析化学
·
毒理学
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产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2019
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IF 3.42
Xiaoqian Ji,Wan Zhang,Fangqing Ge,Chaoxia Wang,Yunjie Yin,Kunlin Chen
A novel “off-on” terminated polyurethane based on the rhodamine B modified dye RhEA was constructed with the polyethylene glycol (PEG) and 1,4-butanediol (BDO) as soft segment, isophorone diisocyanate (IPDI) as hard segment. The RhEA terminated polyurethane turned to red from colorless after 254 nm UV induction accompanying transformation of RhEA from a twisted spirolactam to a planarized ring-opened amide. The intensity of absorbance enhanced as UV induction time increased. And the color of the RhEA terminated polyurethane changed from red turned to light red (45 °C) and colorless (65 °C), reversibly. The RhEA terminated polyurethane showed good thermal stability. The thermochromic cotton fabric was obtained with RhEA terminated polyurethane via flat screen printing and it turned to red from white after 254 nm UV induction. The K/S values decreased nearly 65.8% at 45 °C compared to 40 °C suggesting the thermochromic cotton became light red and it turned to white completely at 65 °C. The lactam ring was still retained during the printing process and the thermochromic cotton fabric possessed thermochromic behavior after UV induction. They can be a promising candidate for developing a flexible sensor to monitor environmental changes.
研究领域:
材料科学
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染料化学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
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2023
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IF 3.4
Meng Li,Fengmei Ren,Haihong Ma,Weibing Xu,Zhengfa Zhou
In this paper, hydroxyl terminated copolyesters with different double bond position and density were prepared from bio-based dibasic acids. Bio-based unsaturated polyesters with -C=CH 2 in side (MPIA), -CH=CH- in main chain (MPFA), and with -C=CH 2 in side and -CH=CH- in main chain together (BDIA) were synthesized by using itaconic acid, fumaric acid, cis -2-butene-1,4-diol, and 2-methyl-1,3-propanediol as raw materials. The number molecular weight of MPIA, MPFA and BDIA was controlled almost the same. UV-induced bio-based polyurethane adhesion-reducing adhesives (BPURA) was prepared by bio-based unsaturated polyester, isophorone diisocyanate (IPDI), chain extender and photoinitiator. BPURA produced by MPIA, MPFA and BDIA were named BPURA-1, BPURA-2 and BPURA-3, respectively. The 180 0 peel strength before and after UV irradiation of BPURA-1 was 22.07 and 0.17 N/25 mm, while that of BPURA-2 was 8.56 and 0.34 N/25 mm, respectively. It could be found that the contribution of 180 0 peel strength of -C=CH 2 in side (BPURA-1) was greater than that of -CH=CH- in the main chain (BPURA-2). SEM and 3D laser measurement microscope showed that BPURA-3 had the highest roughness after UV irradiation, which is conducive to the viscosity reduction effect of the adhesive. The 180 0 peel strength before and after UV irradiation of BPURA-3 was 21.22 and 0.11 N/25 mm, respectively, which meets the bond strength standard of temporary bonding adhesive during wafer processing.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Weihua Zhang,Changwen Zhao,Wantai Yang
High efficiently conducting Norrish II type UV-induced graft polymerization on fully aromatic liquid crystal polymers (LCPs) is still a great change due to its lack of sp3 hybridized C–H bonds. Here, a facile strategy for photograft modification of LCP film surfaces was developed. First, the LCP surface was modified by the UV-assisted aminolysis reaction to introduce H atoms that can be effectively abstracted by Norrish II type photosensitizers. Then, photograft polymerization of acrylic acid or styrene/maleic anhydride on the surface of modified LCP was achieved under UV irradiation by using benzophenone (BP) as a photosensitizer. The water contact angle of LCP decreased from 86° to 40° after being photografted with poly(acrylic acid) (PAA). The highest grafting density reached 7.78 × 10–2 mg/cm2, which is much higher than the unmodified LCP directly photografted with PAA (2.57 × 10–3 mg/cm2). The strategy showed excellent spatial controllability in preparation of the regionally modified LCP surface. Patterned polymer brushes of PAA and styrene-maleic anhydride copolymer could be introduced onto the surface of the LCP film with the help of a photomask, which were further used to selectively deposit a silver pattern by electroless plating and immobilize protein, respectively. The PAA-modified LCP deposited with the copper layer exhibited improved adhesive property with copper foil and had a peeling strength of 12.3 N/cm, which was much higher than the peeling strength of blank LCP (0.7 N/cm). This success of the two-step UV-induced graft surface modification of LCP has promising applications in the fields of high-speed electronic communication, biomedical materials, composite materials, and other fields.
研究领域:
材料科学
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高分子化学
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生物医学工程
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DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 30
·18381-18386
·
IF 3.361
Hongrui Cheng,Xiaofeng Wei,Haijiang Qiu,Wensong Wang,Wenyue Su,Yuanhui Zheng
Carbon-based fluorescent security labels are effective methods to prevent counterfeiting. However, the properties of poor optical stability, complex and energy-consuming synthesis processes and weak bonding with substrates of carbon-based fluorescent materials limit their application prospects. Here, a novel in situ fluorescent patterning strategy is developed to achieve covert, chemically stable and solvent-tolerant cellulose-based security labels by UV exposure. The unsaturated double bonds as the origin of the fluorescence were generated during the photodegradation process under UV exposure. The fluorescent emission of cellulose-based materials reveals excellent stability under acidic, alkaline, reducing, oxidizing and non-polar solvent environments. These advantages give the cellulose nanofiber based security label fantastic potential applications.
研究领域:
材料科学
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光学
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化学工程
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Wenxia Sima,Chen Liang,Potao Sun,Ming Yang,Chun Zhu,Tao Yuan,Fengqi Liu,Mingke Zhao,Qianqiu Shao,Ze Yin,Qin Deng
It remains challenging to promptly inhibit and autonomically heal electrical trees inside insulating dielectrics, which are caused by sustained strong electrical fields and substantially shorten electronic device lifetimes and even cause premature failure of electrical equipment. Therefore, we demonstrate a magnetically targeted ultraviolet (UV)-induced polymerization functional microcapsule (MTUF-MC) to endow insulating materials with physical and electrical dual-damage self-healing capabilities. Specifically, Fe3O4@SiO2 and TiO2 nanoparticles, which serve as magnetic targets and UV shields (thereby preventing the healing agent from prematurely triggering), constitute a functional microcapsule shell, ensuring a low dopant concentration and excellent self-healing ability of the epoxy composites without affecting the intrinsic performance of the matrix. By exploiting insitu electroluminescence originating from electrical trees, UV-induced polymerization of healing agent is handily triggered without any applying external stimuli to intelligently, contactlessly, and autonomously self-healing electrical trees inside insulating dielectrics.
研究领域:
材料科学
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电气工程
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Xianglei Han,Yao Wang,Zhi Wang,Xu Li,Yingying Liu,Chong Wang,Fangzheng Yan,Jixiao Wang
Reverse osmosis membrane with high permselectivity and durability is highly desirable. Due to the self-limiting in interfacial polymerization process, existing strategies for membrane selective layer construction are constrained. Herein, a designable evolutionary strategy named interfacial polymerization plus, which combines interfacial polymerization and UV-induced graft polymerization, is proposed to construct the membrane selective layer. As a result, a sophisticated selective layer with rationally designed bulk and surface is obtained. The selective layer endows membrane with unprecedented improvement in permeability, chlorine-resistant and anti-fouling properties, while maintaining high rejection. Meanwhile, the long-term excellent performance under severe conditions indicates that the developed membrane has great potential in new and expanding applications.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2017
·Vol. 4
·期 13
·1700268
·
IF 4.279
Shu Deng,Jianying Huang,Zhong Chen,Yuekun Lai
Superhydrophobic surfaces in nature have attracted a great deal of interest not only for fundamental understanding but also for practical applications through mimicking the nature. Fluorochemicals, due to their intrinsic low surface energy, have been widely applied as artificial superhydrophobic functionalization materials with excellent performance. However, the use of these materials for practical applications might be restricted due to the relative high cost and potential hazards to human health. In this work, a low-cost and environmentally friendly short silane chain material is developed for fabricating superhydrophobic surfaces. A transparent photoactive coating is obtained by polycondensation of trichlorovinylsilane on cotton fabrics. The coating shows excellent superhydrophobicity. After being grafted with vinyl group, the coating can be easily functionalized using a photoclick thiol-ene reaction. The thiol-ene reaction has resulted in highly uniform polymer networks, which makes it possible to realize the rapid wettability switch from superhydrophobic to superhydrophilic state. Such ability makes it potentially viable to prepare well-defined cotton patterning by printing, and realize flexible electronic devices when electrodes are printed on the fabrics.
研究领域:
材料科学
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表面化学
·
纺织工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
·
2024
·
IF 3.2
Yiting Wang,Xinxin Wang,Weixiang Chen,Longguan Zhu,Bingjian Zhang
It has become widely acknowledged that certain underwater cultural relics, in a state of severe decay, should be salvaged for further protection. Underwater temporary reinforcement materials provide the possibility for such protection. These materials can achieve both the reinforcement of cultural relics underwater, as well as their reversible removal after extraction, without causing damage to the cultural relics in either process. In this context, two kinds of hydrogels based on polyethylene glycol-derived polymers were developed in this study. They are denser than water and can undergo gelatinization by UV-induced or oxidant-induced reactions in the underwater environment. Additionally, they possess enough mechanical strength to provide the necessary support in the bonding process. Both hydrogels have been successfully used to extract fragile underwater archaeological wooden artifacts in situ under laboratory conditions. The experimental results revealed that, in the case of UV-induced hydrogels, the compression strength was 115 kPa with a tensile strength of 20 kPa. For oxidant-induced hydrogels, the compression strength was 382 kPa, while the tensile strength was 8.2 kPa. During the actual extraction processes, the UV-induced hydrogel exhibited a lower water absorption ratio, maintained a more stable mechanical property underwater, and was easier to remove after extraction. On the other hand, the oxidant-induced hydrogel could complete the gelation process quickly through a rather convenient operation; however, it tended to absorb surrounding water and swell, thereby reducing its mechanical property. These two methods would be adapted to different underwater archaeological sites as convenient, environmentally friendly, and cost-effective novel methods for extracting fragile underwater wooden relics.
研究领域:
材料科学
·
文物保护
·
环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2011
·
IF 3.673
Xiao-Lin Li,Li-Ping Zhu,You-Yi Xu,Zhuan Yi,Bao-Ku Zhu
A novel method for the preparation of hydrophilic and positively charged nanofiltration (NF) membranes was developed. An active top-layer with NF characteristic was composited onto polysulfone (PSf) ultrafiltration substrate by UV-induced graft polymerization of N , N -dimethylaminoethyl methacrylate (DMAEMA) followed by quaternization cross-linking with p -xylylene dichloride (XDC). Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy and atomic force microscopy were employed to monitor membrane surface chemical and morphological changes after poly(DMAEMA) grafting and quaternization cross-linking. The influences of UV irradiation time, monomer DMAEMA concentration, the cross-linker XDC concentration on the separation and permeation properties of membrane were investigated. The surface hydrophilicity of the composite membranes was evaluated by contact angle measurement. It was found that membrane hydrophilicity was obviously enhanced after UV-induced grafting and quaternization cross-linking. As the UV irradiation time and DMAEMA monomer concentration were increased, salts rejection of the composite membranes increased while water permeability decreased. Under the optimized preparing conditions, water flux and MgCl 2 rejection (1.0 g/L) of the composite membranes reached 60.3 L/(m 2 h MPa) and 93.2%, respectively. The membrane surface charge property was measured via a streaming potential method. It was found that, at pH from 4.5 to 9, the composite membranes showed positive zeta potentials. The rejections of the composite membranes to different salts followed the order Na 2 SO 4 < NaCl < MgSO 4 < MgCl 2 < CaCl 2 . Moreover, the composite NF membranes showed a good stability in water-phase filtration process.
研究领域:
材料科学
·
环境工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）