POLYMER TESTING
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2024
·
IF 5
Zengxu Chen,Yongquan Zhang,Baoshan Zhu,Jingshun Wang,Jingrun Hu,Jianxin Zou,Zhao Jin,Xinhe Li,Yue Zhang,Changhai Zhang
With high energy density and high safety, all-solid-state lithium metal batteries (ASSLMBs) are considered the most competitive next-generation energy storage batteries. In this work, different formulations of PEGDA-based solid-state electrolytes were prepared by solution flow casting and UV-irradiated in situ polymerization. Polyethylene oxide (PEO) was introduced to solve the problem of improving the flexibility of the substrate, and a 1:5 mass ratio between them was determined. Inorganic ceramic filler Li 1.25 Al 0.25 Zr 1.75 (PO 4 ) 3 (LAZP) and plasticizer butanedinitrile (SCN) were introduced to improve the ionic conductivity (σ) of the electrolyte. The best performing PP15-30-SCN sample showed a 40-fold improvement in room temperature ionic conductivity over PEGDA and lithium ion mobility number of 0.43. The ASSLMBs were assembled with composite electrolytes and tested at 60 °C. The polarization of PP15-30-SCN was significantly reduced, and the battery cycled stably at current densities from 0.1 to 2 C, with an average discharge specific capacity of 111.78 mAh g −1 at 1C. The average specific capacity at 1C was 111.78 mAh g −1 . Meanwhile, the capacity retention rate was more than 99% after more than 70 long cycles at 0.5C.
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ACS Applied Electronic Materials
·
2025
·
IF 4.7
Weijie Wu,Qingduan Li,Yue-Peng Cai,Songyang Yuan,Shengjian Liu
The widespread application of quick response (QR) codes has brought data security issues to the forefront, largely due to the ease of data accessibility. In this study, we designed a two-dimensional perovskite material, (FPA)2PbBr4 (FPA = (R)-1-(4-fluorophenyl)ethylamine), to enhance data security by increasing the retrieval threshold of QR codes. This material exhibits little absorption in the visible light spectrum, with an abrupt absorption edge at 402 nm. Notably, by introducing an F– anion into the spacer and inducing protonation, the dipole moment of the spacer from 1.26 to 11.03 D facilitates rapid self-assembly crystallization of the two-dimensional (2D) perovskite. More importantly, we obtained (FPA)2PbBr4 crystal films with a high crystal orientation (001) by solution spin coating. The encoded QR code base on the high-orientated 2D perovskite film could only be read under 385 nm UV light irradiation, making it unreadable under normal conditions and thereby enhancing data security. This study provides an innovative approach to data security concerns in QR code technology.
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Advanced Optical Materials
·
2024
·
IF 8
Xinran Wang,Heng Dai,Baozhu Li,Xuhui Xu,Jian Zhang,Daiyuan Liu,Yichun Liu,Zhichao Liu
Optical materials have attracted much attention in anti-counterfeiting applications due to their visualization and multi-emission modes. However, the unit occupancy predestines the material to only monochromatic emission, inhibiting the application of optical materials in advanced information encryption. Here, a green to yellow to deep-red phosphor is reported in a Mn 2+ -activated garnet compound Ca 2 YMgScSi 3 O 12 : Mn 2+ (CYMSS: Mn 2+ ), originating from the abundant lattice sites occupying within the crystal structure by Mn 2+ ions. Three different photoluminescence (PL) emission bands peaked at 517, 576, and 720 nm from 4 T 1 (G) → 6 A 1 (S) are observed, which are attributed to the substitution of [Sc/MgO 6 ] octahedron and [Ca/YO 8 ] dodecahedron sites by Mn 2+ ions, respectively. Hence, tunable emissions from green to deep-red are realized in single Mn 2+ doping by switching the excitation source of ultraviolet (UV)/blue and X-ray, which can be further regulated by varying the Mn 2+ concentration. Multi-position occupying, color-tunable light-emitting materials offer the possibility of more advanced optical information encryption.
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JOURNAL OF HAZARDOUS MATERIALS
·
2012
·
IF 4.173
Chao Zhou,Naiyun Gao,Yang Deng,Wenhai Chu,Wenlei Rong,Shengdong Zhou
Disinfection by-products (DBPs) are a great challenge to our drinking water security. Particularly, nitrosamines (NAms), as emerging DBPs, are potently carcinogenic, mutagenic, and teratogenic, and have increasingly attained public attention. This study was to evaluate the performance of the NAms degradation by the ultraviolet (UV) irradiation (253.7 nm) in the presence of hydrogen peroxide (H 2 O 2 ). In the UV/H 2 O 2 system, hydroxyl radicals (OH ), a type of nonselective and powerful oxidant, was produced to attack the molecules of NAms. Factors affecting the treatment efficiency, including the H 2 O 2 dosage, initial NAms concentration, UV irradiation intensity, initial solution pH, and inorganic anions present in water, were evaluated. All the NAms degradation exhibited a pseudo-first-order kinetics pattern. Within 60 min, 0.1 mg/L of any NAms could be almost decomposed except NDPhA that required 120 min for complete removal, at 25 μmol/L H 2 O 2 and at initial pH 7. Results demonstrate that the UV/H 2 O 2 treatment is a viable option to control NAms in water.
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PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2024
·
IF 2.6
Xiuping Lin,Chang-sheng Shao,Shereen M. Elsherbiny,Qing Huang
Astaxanthin (AST) is a xanthophyll carotenoid with strong oxidation resistance, which can effectively scavenge various free radicals and protect organisms from oxidative damage. AST is also known to have prominent anti-aging effects, but the underlying mechanism of AST in anti-radiation aging is largely unknown. In this work, we applied ultraviolet (UV) irradiation to accelerate the aging of Caenorhabditis elegans ( C. elegans ) and treated the nematodes with AST to explore whether and how AST could attenuate the radiation-induced aging effect. Our results showed that AST improved the survival rate of C. elegans , reduced the aging biomarkers, and alleviated the mitochondrial dysfunction caused by the irradiation. Based on the transcriptome sequencing analysis, we identified that the key genes regulated by AST were involved in JNK-MAPK and DAF-16 longevity signaling pathways. Furthermore, we employed jnk-1 and daf-16 mutants and verified the role of the JNK-1/DAF-16 signaling pathway in the anti-aging effect. As such, this study has not only demonstrated that AST can resist the aging process caused by UV-irradiation but also revealed the anti-aging mechanism of AST through JNK-1/DAF-16 activation in C. elegans.
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TALANTA
·
2012
·
IF 3.794
Lizhen Liu,Feng Feng,Shaomin Shuang,Yunfeng Bai,Martin M.F. Choi
A rapid and efficient capillary zone electrophoresis (CZE) method with ultraviolet detection has been successfully developed for the determination of puerarin in Xinkeshu capsules and biological samples. The optimal CZE conditions were determined to be 70 mM H 3 BO 3 –Na 2 B 4 O 7 , pH 9.2, injection time 5 s, applied voltage 25 kV, working temperature 25 °C and detection wavelength 254 nm. Under these conditions, a linear range from 17.3 to 138 μg/mL with the correlation coefficient of 0.9998 and limit of detection of 34.6 ng/mL ( S / N = 3) for puerarin were obtained. The relative standard deviation of the migration time and peak area of puerarin were 0.23–0.91, 0.43–1.62, 0.10–0.64 and 0.64–1.32% for intra-day and inter-day analyses, respectively. Satisfactory results were obtained for recovery and repeatability. The proposed method was successfully applied to analyze the puerarin content in Xinkeshu capsules and some biological samples with good results. It is suitable for applications in pharmaceutical industries for quality control and in clinical laboratories for therapeutic drug monitoring purposes.
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Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 40
·10652-10659
·
IF 5.256
Weiyao Wei,Cheng Yang,Jiaying Mai,Yanfen Gong,Longsen Yan,Kai Zhao,Honglong Ning,Sujuan Wu,Jinwei Gao,Xingsen Gao,Guofu Zhou,Xubing Lu,J.-M. Liu
The interface between the dielectric and the active layer plays a critical role on the performance of solution-processed organic thin-film transistors (OTFTs). However, the creation of a high quality interface still represents a considerable challenge because it requires the balancing of surface energy with surface wettability. This study shows that UV-ozone treatment is very effective to obtain a high quality interface between a dielectric SiO2 film and a solution-processed 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT) semiconductor film. After only one minute UV-ozone exposure on the SiO2 surface, the hole mobility at room temperature reaches 6.50 cm2 (V s)−1 for a solution-processed C8-BTBT-OTFT. UV-ozone treatment can not only modify both surface energy and surface wettability but also clean the SiO2 surface. Consequently, it changes the degree of ordered growth, grain sizes, and grain boundaries in C8-BTBT films. Hence, UV-ozone treatment is a simple and efficient way to produce the desirable interface qualities that enable the highly ordered growth of C8-BTBT films. Using this method it is also very promising to produce a high-quality interface between the dielectric film and other solution-processed organic semiconductors to fabricate other high-performance OTFT applications.
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JOURNAL OF BIOMATERIALS APPLICATIONS
·
2017
·
IF 2.31
Liu Jiang,Huaming Qian,Gang Chen,Chunyan Li,Guangjun Yan,Yanling Luo,Peng Liu,Yashao Chen
In this study, micropatterns on polypropylene films were fabricated via plasma pretreatment and UV-initiated graft polymerization. Firstly, radio-frequency plasma, which does not significantly influence bulk attributes of substrates due to limited penetration depth, was utilized to activate polypropylene films. Then, different sizes of micropatterns of poly(hydroxyethyl methacrylate) (PHEMA) were fabricated on the polypropylene films via UV-initiated graft polymerization of hydroxyethyl methacrylate by using photo-masks. Scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and contact angle (CA) were employed to characterize changes of pristine polypropylene films and modified ones in surface morphology, roughness, hydrophilicity, free energy and the surface chemical composition. All of these confirmed the successful grafting of different sizes of PHEMA micropatterns on the polypropylene surface. Furthermore, the influence of PHEMA micropatterns on cell proliferation and cytotoxicity was evaluated in vitro. Analysis of cell behaviour indicated that PHEMA micropatterns of the appropriate size can promote cellular adhesion and proliferation, and the PHEMA-micropatterned polypropylene films had good biocompatibility. The approach presented here provides an alternative to synthesize on the surface of polypropylene films’ micropatterns with the aim of using them in a diverse array of applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Zi Feng He,Chang Li,Tian Xing Fang,Dong Yu Zhu,Qianyun Deng,Weifeng Liu,Xueqing Qiu
Polyurethanes are widely utilized across various fields. In the pursuit of sustainable development, current research prioritizes the development of bio-based, environmentally friendly polyurethanes. Wood flour, a type of biomass waste, faces significant challenges in achieving high-value utilization. In this study, wood flour was pretreated with sodium hydroxide solution to generate extracted lignin (Elig) and alkali-treated wood flour (AWF), which were subsequently employed to fabricate biodegradable polyurethane elastomers. Elig was further modified with polycaprolactone (PCL) to enhance its reactivity and flexibility, serving as a biological macromolecule crosslinker in the synthesis of lignin-based polyurethane [PU(Plig)]. Tough polyurethane composite elastomers were then obtained by incorporating AWF into PU(Plig). The resulting PU composite elastomer, PU(Plig@AWF), containing strong interfacial interaction between Elig and AWF, exhibited high toughness (188.15 MJ/m 3 ), excellent UV resistance (with stress and strain retention rates of 77.92 % and 77.07 %, respectively, after 96 h of ultraviolet aging), and outstanding biodegradability (with a mass loss of 19.06 % observed after 50 days of soil degradation testing). Additionally, leveraging the unique characteristics of lignin and wood flour (WF), the elastomer demonstrated remarkable light/thermal-electric conversion capabilities, effectively powering a fan. This study advances the development of biomass-based, multifunctional polyurethane elastomers with enhanced cost-efficiency.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2024
·Vol. 35
·期 8
·e6547
·
IF 3.1
Xiao-qin Feng,Yi Wang,Xun Dai,Xiao-dong Liu,Yuan Liu
Flexible electronics are striving in modern society, and they impose harsh and urgent requirements for flexibility on electronic package substrates. However, traditional materials, including ceramics, metals, or polymers are lack of flexibility. Herein, a polyurethane named PU-D1Q1VF1 is proposed via incorporating carefully selected biobased units and synergistic dynamic bonds, and the PU-D1Q1VF1 not only meets the basic requirements of flexibility but also possesses properties of self-heal, UV-protection, reprocessability, and degradability. The polycaprolactone diol (PCL diol) was employed as the soft segment, and the bis(2-hydroxyethyl) disulfide (HEDS) and lignin derived model monomer hydroquinone were selected as chain extenders. Moreover, carefully synthesized bio-based monomer (E)-4-(((furan-2-ylmethyl)imino)methyl)-2-methoxyphenol (VF) was used as the capping agent, which could facilitate the self-healing process of the PU-D1Q1VF1.
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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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Journal of Environmental Sciences
·
2025
·
IF 6.3
Wenxin Shi,Yuan Zhang,Yanei Xue,Wenjun Sun,Bing Zhang,Le Gao
The essential to improve the coagulation efficiency is to select and optimize the pre-oxidation process. Ultraviolet/sodium percarbonate (UV/SPC) can be employed as an alternative system to UV/H 2 O 2 in drinking water treatment plant operation, benefiting from the solid stability properties with the equivalent effect. At present, the studies on UV/SPC, and other UV/advanced oxidation processes (UV/H 2 O 2 , UV/persulfate, UV/chlorine, etc.), mostly focus on the advanced water treatment after filtration, this study notes that UV/SPC has advantages in the pre-oxidized organics. UV/SPC improving the effect of coagulation on dissolved organic carbon (DOC) elimination by up to 25 %, the optimal UV dose and SPC dosage are 600 mJ/cm 2 and 20 mg/L verified by a pilot experiment; the decomposition degree and conversion of organics which is most conducive to follow-up coagulation treatment is obtained through the detailed comparison of the influence range of UV dose or the C SPC on the molecule structure of organics; the disparate role of UV was unraveled in UV photolysis pre-oxidation and UV/SPC pre-oxidation and coagulation, including the influence regularity of UV transmittance (UVT) and processing flow rate on UV dose; confirm that UV/SPC alleviates the risk of the generation of disinfection by-products (DBPs) to 51.15 %. This study corroborates the potential of UV/SPC as a pre-oxidation technology at the application level.
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