JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2020
·Vol. 97
·期 2
·466-478
·
IF 2.008
Ma Haohua,Wang Jianqiang,Zhang Wenpei,Guo Cheng
To allay concerns that sunscreen ingredients are harmful to skin health, we have developed phenylalanine (Phe) and leucine (Leu) dipeptide functionalized silica-based nanoporous material (Phe-Leu-OMe-Meso) as a safe ultraviolet filter for skin protection from UVA/UVB sun irradiation. The selected peptide-based functional molecules are composed of natural amino acids, which have obvious advantages compared with other biological molecules and organic molecules, such as low toxicity and high stability. Octyl salicylate (OS) is adopted as the drug molecule to observe the adsorption behavior of the nanoporous materials. The results confirm that Phe groups effectively improve the OS loaded capacity of Phe-Leu-OMe-Meso by aromatic π – π stacking interaction, and the experimental data obey the pseudo-second-order kinetic model and the Langmuir, Freundlich, Temkin isotherm model. Moreover, in vitro evaluation of the spectrophotometric sun protection factor indicates that Leu groups make Phe-Leu-OMe-Meso possess an excellent sunscreen efficacy close to that of mesoporous TiO 2 and exhibit a synergistic effect with OS on sun protection. In summary, the dipeptide functionalization of silica-based nanoporous material has an excellent prospect in the application of sunscreen.
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高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Chao Ding,Nai Wang,Hongfei He,Wanyu Shen,Yan Jiao,Jie Mao,Hao Huang,Hong Zhu,Rongshui Qin,Bin Yu
ABSTRAT Polyurethane rigid foam (RPUF) is widely used in building insulation materials, but the applications of which are limited by its high flammability. Although fireproof coatings have been proven to be effective at achieving fire-safe RPUF, the development of multi-functional fire-protective coatings still remain a huge challenge. Herein, a phosphorus-containing HEMA-HEDS-PPDC (HSP) prepolymer was successfully synthesized from hydroxyethyl methacrylate, bis (2-hydroxyethyl) disulfide and phenylphosphoryl dichloride, and then a crosslinked flame retardant coating was constructed on RPUF by UV-curable radical polymerization. Experimental results show that the HSP coating significantly improves the flame retardant performance of RPUF. Among them, HSP-2/RPUF reaches V-0 rating in the vertical combustion test, and the limiting oxygen index increases from 19.0% of pure RPUF to 26.8%. The mechanism study suggests that the flame retardant effect of the coating is due to the synergistic mechanism of physical barrier effect of dense carbon layer and chemical inhibition effect of phosphorus-containing free radicals. In addition, the highly crosslinked HSP network structure also endows the material with excellent water resistance and mechanical properties. It is particularly noteworthy that the disulfide bonds introduced into the system confer certain self-healing and recyclability properties to the coating. This study provides a new idea for developing multifunctional flame retardant coatings and has broad application prospects in the fire protection of flammable substrates.
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高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Hanxuan Zeng,Shuwen Shen,Anhong Cai,Qian Sun,Lei Wang,Shijun Zhu,Xueyan Li,Jing Deng
As a widely produced and used antibiotic, tetracycline (TC) has been frequently found in rivers, soil and drinking water . In this study, the degradation of TC was investigated by UV/Fe 3+ /persulfate (PS) coupled process. The degradation behavior was well fitted with pseudo-first-order model. Hydroxyl radicals (·OH), sulfate radicals (SO 4 − ·) and superoxide radical (O 2 − ·) were identified as the primary reactive oxygen species (ROS) in UV/Fe 3+ /PS process, the contribution to TC degradation were found to be 41.94%, 33.94% and 17.44% at pH 3.0, respectively. Fe(IV) generated from the system also played a crucial role in TC removal. The effects of process parameters (PS/Fe 3+ dosages, pH, humic acid , Cl − , HCO 3 − , NO 3 − and CO 3 2− ) on degradation were investigated. It was found that the degradation of TC was highly pH-dependent, and the optimal performance was obtained at pH 3.0. Except for Cl − , the presence of HA, HCO 3 − , NO 3 − and CO 3 2− inhibited TC degradation. The possible transformation pathway involving the hydroxylation, N -demethylation, hydrogenation and dehydroxylation was proposed. Furthermore, the toxicity and mutagenicity of TC and transformation products (TPs) were estimated using ECOSAR and TEST softwares, demonstrating that the toxicity level of most TPs was lower/equal to their precursors. The evaluation of DBPs showed that UV/Fe 3+ /PS process could reduce the potential of DBPs formation, especially for TCAA and TCM. Microbial community composition was analyzed by 16 S rDNA sequencing, and the relative abundance of ARG-carrying opportunistic pathogens was significantly declined after UV/Fe 3+ /PS treatment. In general, this study provides an economical, efficient and safe strategy for TC removal.
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高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yihao Yang,Yuanyuan Tu,Zhuoyao Lou,Xuefeng Gui,Jiali Kong,Zhenzhu Huang
Photothermal superhydrophobic coatings are promising for anti-icing/deicing. However, preparing such coatings from environmentally friendly and sustainable strategies is challenging. Herein, a bio-based and durable photothermal superhydrophobic coating is prepared via layer-by-layer strategy. Bio-based methacrylic acid epoxidized soybean oil oligomers are synthesized as an alternative to petroleum-based binders. Meanwhile, efficient photothermal conversion of hydrophobic particles are enabled by oxidative self-polymerization of dopamine to decorate hydrophobic silica particles grafted with hydrophobic long-chain alkanes and photo-curable methacrylic acid moieties. Ultimately, the superhydrophobic coating is achieved by spraying photothermal hydrophobic particles onto an oxygen-inhibited layer of pre-cured bio-based binder followed by thorough photocuring treatment. The coating exhibits powerful water repellency (WCA of 158.2 ± 1.6°, SA of 4.6 ± 0.8°), good robustness, chemical and UV irradiation resistance. Moreover, under NIR laser irradiation (808 nm, 1 W/cm 2 ), the coating features excellent photothermal conversion efficiency (ΔT of 41.0 °C at 30 s) and stable photothermal conversion performance. And in frigid conditions (-15 °C, ∼73 ± 5 % RH), the coating delivers rapid defrosting (few seconds) and deicing (20 μL water droplet melts in 42 s) performance under NIR irradiation of 1 W/cm 2 . Therefore, the as-prepared coating provides valuable insight into global anti-icing/deicing action.
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高影响因子
FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 9
·3369-3377
·
IF 2.2
Yao Jiale,Xu Jiang,Cui Ao,Wang Rui,Hao Longyun
In this study, the molecules in wool fabric were modified to convert their disulfide bonds into sulfhydryl groups (–SH) by using tris (2-carboxyethyl) phosphine hydrochloride (TCEP) as a reducing agent. The XPS, SEM, and UV–visible absorption spectrum were utilized to track the modification process. MXene and UV-curable PUA resin were blended and printed on the modified wool substrates by screen printing way, followed by a sustainable UV irradiation to effectively fix the printed coating on them. The effects of TCEP on the wettability, electrical resistance of conductive coatings were investigated. Especially, the durability of the conductive coatings to mechanical operations, wet and temperature treatment were systematically evaluated by measuring the resistance change rate on unmodified and TCEP modified wool fabrics, respectively. The results indicated that TCEP modification of wool fabrics could significantly improve the durability and stability of conductive coatings. This was because the active –SH groups in modified wool could participate in the polymerization of PUA molecules into a film under the excitation of UV photo-initiators, greatly improving the integrity and toughness of its structure and ultimately resulting in better adhesion between conductive coatings and wool fabrics.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xiaohui Wang,Xinmei Li
Developing multifunctional separation membranes, especially composite separation membranes that are corrosion-resistant, fouling-resistant, and easy to collect, has become a new challenge to treating oily wastewater in complex environments. Therefore, superhydrophobic magnetic membranes composed of polystyrene/poly(acrylonitrile)-poly(vinylidene fluoride)/poly(dimethylsiloxane)-iron oxide/titanium dioxide nanoparticles (PS/PAN-PVDF/PDMS@Fe 3 O 4 /TiO 2 ), which possess exceptional corrosion resistance and UV absorption properties, were fabricated through the process of electrospinning. Controlling the doping ratio of Fe 3 O 4 /TiO 2 , composite membranes with excellent superhydrophobicity (156.9°), mechanical properties (3.67 MPa and 75.93 %), and thermal stability (330 °C) were obtained. The membrane demonstrates outstanding corrosion resistance (WCA > 150°) even after being immersed in various corrosive solutions for 120 h. Under visible-ultraviolet irradiation, the membrane has excellent UV absorption and exhibits a significant red-shift phenomenon, providing a certain degree of resistance to fouling. In the presence of a magnetic field, the membrane has a maximum saturation magnetization of 9.98 emu/g, which the magnetic field drive can attract. The oil adsorption capacity of the membrane was 29–112 g/g, which also maintained 88 % of the initial value after ten cycles. In addition, a comprehensive evaluation was conducted to assess the fabricated composite membrane's separation flux, efficiency, and cycle life when exposed to acidic and alkaline corrosive solutions. The results indicated that even after 40 cycles, the membrane's oil–water separation flux and separation efficiency remained at 6971 L.h −1 .m −2 and 97 %, respectively, representing a 24.2 % increase compared to the unmodified membrane. Therefore, the membrane exhibits promising potential for treating oily wastewater in harsh environments.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shengtao Zhang,Wenjie Yang,Bohan Li,Yusong Wang,Chunxiang Wei,SanE Zhu,Zhongxing Geng,Eric W.M. Lee,Hongdian Lu,Bin Yu,Wei Yang,Chuyan Wang
Polylactic acid (PLA) is widely known for its biocompatibility, biodegradability, and high transparency. However, it still has varied limitations such as flammability, UV sensitivity, and poor oxygen barrier properties. To address these issues, a bio-based compound, hexasubstituted cyclotriphosphazene (HVP), was synthesized by using vanillin and hexachlorocyclotriphosphazene to enhance the overall performance of PLA. The resulting PLA/HVP composites demonstrated improved mechanical strength and UV resistance. Specifically, PLA/3HVP, with a 3 wt% HVP loading, achieved a UL-94 V-0 rating and a high limiting oxygen index of 26.5 %. Cone calorimeter tests revealed that PLA/3HVP possessed a significantly longer ignition time and a lower peak heat release rate compared to pure PLA. These burning testing results indicated the enhanced fire resistance. Additionally, the oxygen transmission rate of PLA/3HVP was reduced by 81.1 % compared to pure PLA. When used as food packaging, the weight loss of mangoes covered with PLA/3HVP film was 2.2 % after 7 days, compared to 2.5 % with pure PLA film, highlighting its potential for food preservation applications.
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DOI
PubMed
高影响因子
Journal of Future Foods
·
2024
·
IF 5.2
Baoshan Tang,Jinju Ma,Lanxiang Liu,Juan Xu,Hong Zhang,Kun Li,Xinghao Tu,Qingfang Guan
In order to improve the water-resistance and ultraviolet (UV) barrier properties of pullulan (PL) film, edible composite films were prepared by solution casting based on PL and shellac (SH). The physical properties, thermal stability, mechanical properties, water vapor permeability and UV barrier of the composite films were characterized. The analysis of the functional properties revealed that the composite films had good compatibility, water-resistance (33.50˚–60.15˚), and strong UV-blocking properties (84.60%–0.00%). The addition of SH improved the water-resistance and mechanical properties of the films, but the thermal stability was slightly reduced. These films can be used as an edible coating on Chinese cherries. According to the characteristics of weight loss, decay incidence and other indicators of cherries, the PL-SH composite films can keep Chinese cherries fresh at room temperature at least for 7 days. Therefore, PL-SH composite films may be an environmentally friendly packaging material with application prospects in the fruit preservation industry.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 47
·2423881
·
IF 19
Weidong Song,Junxing Lv,Jun Wei,Jiabo Ge,Hainan Qin,Huimin Duan,Jiaquan Li,Xin He,Ziqing Li
Wide-bandgap copper halide semiconductors hold significant potential for next-generation ultraviolet optoelectronics due to their remarkable photophysical properties. However, defects in polycrystalline films, such as point/interfacial defects and grain boundaries, create pathways for moisture and ion diffusion, thereby compromising device performance and stability. Herein, the capillary epitaxy growth of CsCu 2 I 3 single-crystal films (SCFs) is demonstrated with a bandgap of 3.68 eV on GaN, by leveraging capillary forces to guide the transport of the molten precursor and using lattice-matching substrates to achieve crystallographic alignments. This strategy suppresses random nucleation and produces CsCu 2 I 3 SCFs with high crystallinity (rocking curve FWHM = 0.286°). The critical role of lattice matching is further underscored by contrasting the polycrystalline CsCu 2 I 3 or Cs 3 Cu 2 I 5 films grown on lattice-mismatched substrates, as well as by the impressive open-circuit voltage of 1.08 V achieved in the CsCu 2 I 3 SCF/GaN heterojunction. The CsCu 2 I 3 SCF/GaN ultraviolet photodetectors demonstrate nW-level detection limit (≈2.81 nW) and self-powered operation, combining the 24 nm narrowband bandwidth with dual-mode (voltage/current) signal outputs for interference-resistant detection and communication. The work not only establishes the first route for the epitaxial growth of copper halide SCFs but also paves the way for the hetero-integration of perovskites onto mature semiconductor platforms for ultraviolet optoelectronics.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Lin Zhang,Nuomei Li,Qiuchen Ma,Jiahui Ding,Chuang Chen,Zhaocheng Hu,Weiwei Zhao,Yufeng Li,Huanhuan Feng,Mingyu Li,Hongjun Ji
A series of large-area, flexible and transparent ultraviolet (UV) photodetectors (PDs) based on Ag nanowire (NW)@ZnO nanorods (NRs) are fabricated by an inexpensive, facile and effective approach. These Ag NW@ZnO NRs are successfully synthesized using a two-step method in an oil bath with a high surface-to-volume ratio and good crystallinity. The PDs are fabricated by drop-coating with different drop-coating times on the surface of polyethylene terephthalate (PET) coupled with Au electrodes. By optimizing the cross-linked network of Ag NW@ZnO NRs, PD2 with a size greater than 25 mm exhibits excellent photoresponse under UV light illumination of 365 nm (1.3 mW cm - 2 ) with a bias of 5 V: a high sensitivity of over 10 3 , and a much shorter rise/decay time of 2.6 s/2.3 s. Simultaneously, the detector exhibits an average transmittance of more than 70% in the visible light region, as well as good flexibility and excellent mechanical stability under a bending angle of 120° over 1000 circles bending. These integral advantages have significant potential for practical applications and mass production.
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高影响因子
FIBERS AND POLYMERS
·
2025
·
IF 2.3
Luo Xiaoying,Yang Jun,Chen Jiang,Ling Xianzu,Jiang Jiayi,Lu Hao,Wan Yizao,Zhang Quanchao
Thermal-responsive shape-memory polymer fibers represent a promising candidate for controllable local drug delivery systems. In this study, we developed thermo-responsive shape-memory fibrous membranes through electrospinning and UV cross-linking, utilizing a blend of poly(p-dioxanone) (PPDO) and poly(ε-caprolactone) (PCL), which were loaded with doxorubicin (DOX). Scanning electron microscopy (SEM) characterization revealed the formation of three types of electrospun fibrous membranes with fiber diameters measuring 1.8 ± 0.4, 3.0 ± 0.7, and 3.7 ± 1.8 μm, designated as PDC-S, PDC-M, and PDC-L, respectively. The results indicated that the chains of PPDO and PCL are crosslinked by UV irradiation through benzophenone and triallyl isocyanurate. Specifically, PPDO functions as hard segments while PCL serves as switching segments. Further investigation demonstrated that the PDC-M membrane exhibited optimal performance with approximately 90% shape fixity ratio and around 82% recovery ratio alongside favorable mechanical properties. After programming, PDC-M displayed controllable drug release behavior capable of releasing DOX in a two-step manner under thermal stimulation. Consequently, they showed significantly enhanced antitumor efficacy along with improved drug-utilization efficiency. Therefore, the PDC membranes prepared through simple blending and UV crosslinking exhibit the desired shape-memory effect, demonstrating significant potential for local antitumor drug delivery applications.
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高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 15
·5206-5216
·
IF 7.393
Weihong Yuan,Tao Tan,Haiyan Wu,Ran Pang,Su Zhang,Lihong Jiang,Da Li,Zhijian Wu,Chengyu Li,Hongjie Zhang
Phosphors emitting visible and near-infrared persistent luminescence have been extensively studied and commercialized owing to their wide applications in emergency lighting, information storage and in vivo bioimaging. However, ultraviolet (200–400 nm) persistent phosphors are rarely reported. Here, we developed a new Pr3+ activated BaLu2Al2Ga2SiO12 persistent luminescence phosphor, which could be effectively excited by a standard 254 nm mercury lamp and exhibits excellent ultraviolet (280–400 nm) persistent luminescence lasting for more than 3 h. This exciting result encouraged us to comprehensively investigate its structural information, photoluminescence and thermoluminescence properties to reveal a feasible persistent luminescence mechanism. The results show that Pr3+ ions act as both photoluminescence and persistent luminescence emitters, and the ultraviolet light emission originates from its parity allowed 4f15d1 → 4f2 inter-configurational transitions. The suitable energy location of the lowest energy 4f2 → 4f15d1 excitation transition and small Stokes shift of less than 3000 cm−1 (0.37 eV) related to the composition and crystal structure of the host lattice BaLu2Al2Ga2SiO12 ensure the occurrence of Pr3+ 4f15d1 → 4f2 transitions. Moreover, the suitable trapping levels related to Pr4+ in BaLu2Al2Ga2SiO12:Pr3+ were also investigated utilizing thermoluminescence spectra, which could be effectively filled by carriers under 254 nm light irradiation to achieve ultraviolet persistent luminescence. This study opens up new avenues for future research on ultraviolet persistent luminescence and brings new application prospects in the fields of photocatalysis and photodynamic therapy.
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高影响因子
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