WATER RESEARCH
·
2021
·
IF 11.236
Tan Meng,Wenjun Sun,Xiao Su,Peizhe Sun
UV-based advanced oxidation processes (AOPs) via photolysis of precursor chemical oxidants have been of interest to numerous researchers over the past several decades due to their capacity to generate highly active radical species and interesting radical chemistry. However, applications of UV-based AOPs have been commonly optimized case by case, due to the lack of theoretical investigations on process optimization, especially on oxidant doses. In this study, a simple equation for UV/H 2 O 2 (•OH as the sole primary reactive species (PRS)) to obtain the theoretical optimal concentration ( C opt-theoretical ) for H 2 O 2 was derived ( C opt-theoretical = A b · S c ε · k ). The equation was then validated for its accuracy in the calculation of C opt-theoretical for H 2 O 2 in the UV/H 2 O 2 AOP using a well-established comprehensive kinetic model. A competition kinetics method for the measurement of scavenging capacity ( S c , the unknown parameter for the simple equation) was designed, for which nitrobenzene was employed as the probe compound and tert‑butyl alcohol was introduced as the standard compound. Based on this simple equation, we calculated the C opt-theoretical of 77 environmental water samples and introduced the concept of a practical optimal oxidants dose for the UV/H 2 O 2 AOP, while minimizing the operation costs in engineering applications. Moreover, this study mathematically proved that the simple equation obtained from UV/H 2 O 2 could be successfully extended to other UV-based AOPs, including UV/chlorine, UV/NH 2 Cl, UV/S 2 O 8 2− , and UV/peracetic acid. The simple equation of C opt-theoretical derived in this study may not only help to provide instructions for engineering applications, but also point out the ultimate treatment capability of each UV-based AOPs.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Yuxin Fu,Yugang Huang,Runsheng Huang,Haojie Zhang,Rui Zhan,Jianwen Yang
To reduce the limitations of traditional polyimides (PIs), such as poor processability, limited flexibility, and low solubility, a series of siloxane-modified photosensitive PIs (PSPIs, designated as D1∼D6) were designed and synthesized. The cured films of these PSPIs were prepared by UV irradiation. In comparison to conventional PIs, the cured films exhibited good heat tolerance, enhanced flexibility, and a lower glass transition temperature. Some films demonstrated very good mechanical properties, low dielectric characteristics, and excellent hydrophobicity, with a maximum tensile strain of 66%, a low dielectric constant as low as 2.7, a high surface contact angle of 113°, and a minimal moisture absorption as low as 0.02%. These cured films hold great potential for applications in packaging and solder mask protection for high-frequency, high-speed printed circuit boards (PCBs).
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FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 3
·765-774
·
IF 2.2
Zhang Tao,Chen Yu,Shao Xue,Wang Zhuoqun,Qiu Fengxian
Plastic agricultural films offer a favorable internal environmental climate for plant growth, boosting crop yields, however, to pursue green ecological agriculture, renewable biodegradable materials become attractive candidates to replace non-degradable petrochemical plastic agricultural films. Herein, this work presents a general strategy to fabricate the transparent and biodegradable cellulose-based film with good hydrophobicity and excellent UV resistance using corn husk and lignosulfonate (LS) as primary materials, and methyltrimethoxysilane (MTMS) as surface modifier for potential agriculture application. The results show that the LS uniformly attaches to the surface of the regenerated cellulose (RC) film, and inherits the excellent tensile strength (20.1 MPa) of the RC film after modification, forming a film that resists a certain tensile force and good thermal stability. Due to the excellent UV absorbing ability, the MTMS-modified RC/LS (M-RC/LS) film demonstrates excellent optical properties of shielding about 95% of UV light and allowing nearly 80% of visible light transmittance, providing the required light capacity for plant growth. In conducting water contact angle tests, the hydrophobic properties of the cellulose-based film are improved by surface modification of MTMS (water contact angle ≈ 100.9°), overcoming the drawback of insufficient stability of cellulose and improving its agricultural application possibilities. In addition, the synergistic effect of LS and MTMS results in a certain reduction of water vapor transmission rate of the cellulose-based film. Based on the above properties, the present study provides a facile strategy to prepare UV-resistant and transparent hydrophobic cellulose-based film, which is valuable to prolong their life and protect the safety of crops, promising to replace transparent plastic films for wider applications in agricultural films and other related fields.
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PROGRESS IN ORGANIC COATINGS
·
2016
·
IF 2.632
Jianquan Tan,Weiqu Liu,Honglei Wang,Yang Sun,Shijian Wang
A novel waterborne UV-curable comb-like (meth)acrylate graft copolymer containing long fluorinated side chains (UVWCAC) was synthesized by conventional radical copolymerization of a novel mono-methacryloyloxy terminated fluorinated macromonomer (PHFBMA-GMA) and (meth)acrylate monomers. GPC, FTIR and 1 H NMR were employed to characterize the structure of the polymers. The influence of both the molecular weight and concentration of PHFBMA-GMA on the properties of UV-cured films was investigated. Hydrophobic surface could be obtained with just small amount of PHFBMA-GMA copolymerized into the polymer. The surface energy of UV-cured films decreased as both the concentration and the molecular weight of PHFBMA-GMA increased. The surface composition of the graft copolymer was characterized by XPS. XPS results confirmed the enrichment of the fluorine atoms on the surface quantitatively. In addition, the physical properties of UVWCAC UV-cured films, such as gel content, water absorption, pencil hardness, adhesion, chemical resistance, mechanical properties, optical transmittance and thermal properties were also investigated in detail. The novel UVWCAC prepared via conventional radical polymerization not only had excellent properties but also had the prominent potential application in large scale industrialization.
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INDUSTRIAL LUBRICATION AND TRIBOLOGY
·
2025
·
IF 1.8
Hui Zhao,Huilin Fang,Yuefeng Ma,Zhipeng Li,Tianhui Ren
Purpose This study aims to extend the service life and applicability under ultraviolet (UV) irradiation conditions, the authors reveal the strong UV resistance of dibenzoylmethane molybdenum (MDBM) in aluminum-based greases by analyzing the effect of UV radiation on the rheological properties, antioxidant properties and UV absorption. Meanwhile, the authors evaluate the tribological properties of MDBM under different sliding modes and applied loads in aluminum-based greases. Design/methodology/approach In this work, the authors designed and synthesized an S- and P-free MDBM through a simple one-pot method and examined the tribological and UV-resistant performance of MDBM within aluminum complex grease. Findings The results show that MDBM has good friction-reducing and anti-wear properties, which is attributed to the adsorption of the MDBM itself and the generation of minor amount of MoO 3 on the worn surface at a maximum Hertzian contact pressure of 0.6 Gpa. The authors also reveal the strong UV resistance of MDBM in aluminum-based greases by analyzing the effect of UV radiation on the rheological properties, antioxidant properties and UV absorption, which is mainly attributed to self-keto-enol isomer interconversion from the special structure of β-diketone. Originality/value The work demonstrates a feasible way to develop novel multifunctional UV resistance organic molybdenum lubricating materials. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-02-2025-0048/
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Gels
·
2025
·Vol. 11
·期 6
·409
·
IF 5.3
Naiyao Mao,Lingxiao Lan,Qiankun Hun,Jianghua Wei,Xinghua Liang,Yifeng Guo
Gel electrolytes (GEs) play a pivotal role in the advancement of lithium metal batteries by offering high energy density and enhanced rate capability. Nevertheless, their real-world application is hampered by relatively low ionic conductivity and significant interfacial resistance at room temperatures. In this work, we developed a gel electrolyte membrane (GEM) by embedding Zeolitic Imidazolate Framework-8 (ZIF-8) metal–organic frameworks (MOFs) material into a poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) matrix through UV curing. The composite membrane, with 4 wt% ZIF-8, exhibited an ionic conductivity of 1.17 × 10−3S/cm, an electrochemical stability window of 4.7 V, and a lithium-ion transference number of 0.7. The test results indicate that the electrochemical performance of LFP//GEM//Li battery has an initial specific capacity of 168 mAh g−1at 0.1 C rate. At 1 C, the discharge capacity was 88 mAh g−1, and at 2 C, it was 68 mAh g−1. Enhanced ionic transport, improved electrochemical stability, and optimized lithium-ion migration collectively contributed to superior rate performance and prolonged cycle life. This study offers novel insights and methodological advances for next-generation lithium metal batteries technologies.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Leyao Bi,Boyan Fu,Jiahui Lin,Junsheng Wen,Jiaxing Fu,Binglin Zou,Ningning Su,Chunjie Wang,Yue Wang
Acetylacetone gas is a flammable, explosive, and toxic volatile compound with a pungent odor that can contaminate the atmospheric environment and pose a risk to human health. Consequently, establishing effective detection methods for acetylacetone is imperative. In this study, Co-doped ZnO (ZOC) were synthesized via a hydrothermal method with varying Co concentrations from 0 to 15 %, and used for the detection of acetylacetone for the first time. The sample with an 8 % Co/Zn mass ratio (8-ZOC) exhibits optimal gas sensing performance for acetylacetone. At a working temperature of 260 °C, the response to 100 ppm acetylacetone reaches up to 557.25, with a rapid response time of 6 s. Compared to pure ZnO, the response of 8-ZOC is increased by 5.9 times, and both the recovery time and the optimum operating temperature are reduced by 154 s and 40 °C, respectively. When exposed to UV light, the response value of 8-ZOC further improves to 682.49. Moreover, the underlying mechanisms of the enhanced gas sensing properties are also explored in detail. This research provides essential insights for the development of acetylacetone gas sensors.
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ACS Applied Electronic Materials
·
2025
·
IF 4.7
Li Xiao,Xiuxian Li,Zhukang Zhang,Yue Long,Gang Wang,Hengxiang Gong
Integrating wide band gap semiconductor materials with silicon (Si) to create heterojunctions is an effective strategy for enhancing the ultraviolet (UV) sensitivity of optoelectronic devices. However, epitaxially growing high-quality wide band gap films on Si substrates at low temperatures without compromising the properties of Si remains challenging. In this study, we introduce a low-cost mist chemical vapor deposition (CVD) technique to deposit Cs3Cu2I5 perovskite films and fabricate a simple-structured Cs3Cu2I5/n-Si planar heterojunction. This technique enables an orderly deposition and rapid crystallization process, distinct from traditional solution-based methods. Herein, we report for the first time a compact, thick Cs3Cu2I5 film with an average grain size of 5.27 μm and a thickness of approximately 2.8 μm exhibiting orientated growth along the (303) plane. Furthermore, the simply constructed Cs3Cu2I5/n-Si photodiode exhibited a maximum photoresponsivity of 186 mA W–1 and a specific detectivity of 2.5 × 1012 Jones under 278 nm illumination. The on–off cycling tests demonstrated excellent operational stability, with unpackaged devices retaining 90% of their initial photocurrent after two months of storage under ambient conditions.
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JOURNAL OF CONTROLLED RELEASE
·
2025
·
IF 11.5
Jueying Chen,Lipeng Qiao,Danyu Cheng,Yutong Yang,Meng Li,Xin Zhao,Baolin Guo
Burn wound complicated by bacterial infection and exaggerated inflammatory response poses a significant threat to patients' lives. Hydrogen sulfide (H₂S) plays a critical role in wound healing, but its application is limited by low carrier loading efficiency and uncontrolled release behavior. Herein, an adhesive, self-healing, and removable supramolecular hydrogel integrating UV-triggered in situ production and on-demand release of H 2 S and targeted recognition and killing of bacteria is developed based on poly(thioctic acid) (polyTA), acrylated adenine (AA) and phenylboronic acid-functionalized silver nanoparticles (AgNPs-PBA) to treat burn wound. The hydrogel exhibits high stability, rapid self-healing behavior, highly effective antibacterial activity through a targeted recognition strategy utilizing the boric acid group, adhesive property, UV-shielding property, removability, and on-demand delivery of H 2 S, which effectively modulates pro-inflammatory cytokine levels (IL-6, TNF-α, and iNOS). In addition, the hydrogel demonstrates good cytocompatibility and anti-inflammatory, and promotes cell migration. Utilizing full-thickness defects of burns and infected burns, we demonstrated that the combined actions of targeted recognition/killing of bacteria and UV-triggered on-demand release of immunomodulatory H 2 S significantly enhanced the burn wound healing process. This adhesive, self-healing, and removable supramolecular hydrogel dressing, with enhanced targeted recognition and killing of bacteria and on-demand in situ H 2 S delivery, holds promising application in burn wounds.
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Materials Today Communications
·
2025
·
IF 4.5
Huilian Qiao,Maoqi Wu,Meitung Poon,Jianqiao Hu,Zeyu Jiang,Hui Yu,John H. Xin,Lihuan Wang
The ultraviolet (UV) resistance refers to the ability of materials to block, absorb, or reflect UV rays. Traditional fiber modification and fabric post-treatment techniques for UV resistance enhancement mainly focus on increasing the UV absorption rate or scattering effect, but there is still significant room for improvement. In this work, we prepared two types of Poly(vinylidene fluoride) (PVDF) fibers through the wet-spinning process: PVDF fibers with a single porous structure and PVDF fibers with added titanium dioxide (TiO₂) particle (exhibiting high UV absorption) (PVDF/TiO₂ fibers). Through the former, we explored the influence of changes in the internal porous structure of the fibers on their UV resistance. And contrast the effects and possible mechanisms of these two fibers regarding UV Resistance. We employed characterization techniques such as SEM, XPS, XRD, and Ultraviolet-Visible-Near Infrared (UV-VIS-NIR) Spectrophotometer. The experimental results show that the average UV transmittance of the two types of fibers is remarkably low(<0.3%). Analysis indicates that they achieve excellent UV resistance via different mechanisms. The porous PVDF fibers possess excellent average UV reflectivity (>80%), while the PVDF/TiO₂ fibers show exceptional UV absorptivity (>82%). There are differences in the effects and applications of UV resistance based on the principles of reflection or absorption. Consequently, the two types of fibers can be applied in diverse scenarios. Moreover, given the large - scale production characteristics of wet - spinning, these fibers hold promising market prospects.
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Water Research X
·
2025
·
IF 8.2
Jinfen Huo,Xingmin Chen,Merete Grung,Youfei Ma,Wanying Lin,Xuan Shi,Yunfei Ma,Yan Lin
Microplastics in aquatic environments are readily colonised by microorganisms to form biofilms facilitating the transport of contaminants and attached microbes. We examine the impact of biofilm formation on the physicochemical properties of microplastics and its subsequent effects on the adsorption of organic pollutants. Here, the adsorption of triclosan (TCS) onto polystyrene (PS) microplastics was investigated by comparing pristine PS (O-PS), UV-aged PS (A-PS), and their biofilm-colonised counterparts (O-PS bio and A-PS bio ). The results show that the adsorption rate of TCS by PS after aging decreased by 45% without a significant effect on the adsorption capacity. The adsorption rate of TCS by the PS biofilm increased by 100%, whereas the adsorption capacity decreased by 57%. Based on 16S rRNA analysis, the diversity and richness of biofilm microorganisms were reduced in the presence of TCS, leading to a change in the dominant species of biofilm microorganisms. By accurately assessing the adsorption behaviour of organic contaminants on microplastic biofilms in the laboratory, this study contributes to a deeper understanding of the interactions between microplastics and organic contaminants in real aqueous environments and provides insights into the effects of TCS, as well as the integrated risk of organic contaminants.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Hanqi Dong,Xinxin Ping,Yuzhen Zhou,Hui Wang,Xin Zhou,Lupeng Shao,Xiao Xiao,Weixing Li,Chao Wang,Zhe Ling
The development of photothermally functional materials derived from renewable biomass has garnered significant interest in recent years, while the integration of the properties is still challenging. In this study, we present a layer-by-layer assembly strategy for fabricating composite lignin nanoparticle (LNP)/cellulose nanocrystal (CNC) Janus films combined with 3-aminopropyl triethoxysilane (APTES) amidated carboxymethyl cellulose (CMC) as the outer layers. The presence of carbonyl and aromatic rings in lignin contributes to its exceptional UV-light absorption capability, achieving a shielding efficiency exceeding 90% in the UVB region. Moreover, the layered assembly structure enhances the film’s mechanical strength by 81.4% and increases its water contact angle to ∼100°, which was a 35° increase compared to the pristine material, indicating superior hydrophobicity. Notably, satisfactory photothermal conversion capability was achieved for the composite films, which were heated to 32 ± 2 °C under the irradiation of simulated sunlight (100 mW/cm2), while maintaining good thermal stability. Besides, the all-biobased films exhibit excellent biodegradability, making them a promising candidate for applications in fields of food packaging, medical materials, outdoor protection, etc.
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