COMPOSITES PART B-ENGINEERING
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2025
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IF 14.2
Yinglu Liu,Dan Wang,Junjia Zhang,Yian Wang,Xinyi Yu,Jie Chen,Haiyan Peng,Jian-Feng Chen,Yukikazu Takeoka
Flexible nanocomposites that combine a high refractive index (RI) and excellent optical transparency are key to enabling multifunctional applications in soft electronics, wearable photonics, and next-generation optoelectronic systems. However, achieving both high transparency and a large RI enhancement remains challenging due to nanoparticle aggregation and poor interfacial compatibility. In this study, we present a novel surface-modified TiO 2 nanoparticle (NP) (∼13 nm) that exhibits enhanced compatibility with UV-curable resins achieving a RI exceeding 2.0 while maintaining high optical transparency and flexibility. The DFT calculation was used to evaluate the absorption energy of the modifier methoxytriethyleneoxypropyltrimethoxysilane (MTE-TMS) and the 2D FTIR measurement was operated to explain the interaction mechanism between the TiO 2 NPs and the bisphenol A glycidyl methacrylate (Bis-GMA) monomer. In-situ FTIR further revealed that the nanoparticles accelerate the UV-curing process. indicating that the NPs can also accelerate the curing process. Benefiting from these properties, the nanocomposites are compatible with roll-to-roll processing, making them highly promising for the large-scale fabrication of optical coatings, anti-counterfeiting labels, and display technologies. This interfacial compatibility strategy can be extended to other high-RI nanomaterials, offering a versatile platform for advanced photonic and optoelectronic applications.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Guolin Zheng,Wentao He,Haonan Cheng,Xinjun Bao,Anlin Zhang,Kun Wang,Bin He,Hengshu Zhou
To our knowledge, the protective coating on textiles has attracted tremendous interest since the outbreak of COVID-19, prompting significant advancements in protective textiles. Herein, the laccase-platinum nanozyme (Lac-Pt) was selected for the first time to catalyze the self-polymerization of epicatechin, in which the epicatechin polymer (PEC) was coated on cotton fabric by in-situ deposition, labeled as CF@PEC. The PEC coating on cotton fabric was confirmed through scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and energy-dispersive X-ray spectroscopy (EDX). Moreover, the self-polymerization mechanism of EC was demonstrated by UV-visible spectra, hydrogen proton nuclear magnetic resonance ( 1 H NMR), X-ray photoelectron spectroscopy (XPS), and FTIR. The laccase and platinum nanozyme exhibited the synergies during catalyzing the oxidation of EC. CF@PEC exhibits good photothermal effect (photothermal temperature of 60.3°C), UV protection ability (UPF of 95.6), and antioxidant properties (94.4 ± 0.3%). In addition, CF@PEC can maintain UV protection ability after undergoing 20 washing cycles. Notably, the Lac-Pt used to create the multifunctional coating not only preserves the strength of the cotton fabric, but also reduces wastewater production. Briefly, this work renders a promising strategy to prepare the protective coating, which may open a sustainable and efficient avenue to room-temperature thermal therapy and can provide heat to the body in cold environments.
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POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Xinqi Di,Xinyu Chen,Yujie Kang,Jing Yang,Yangming Zou,Jiang Jing,Jun Sun,Hongfei Li,Xiaoyu Gu,Sheng Zhang
The applications of polypropylene (PP) are severely limited by its flammability and poor resistance to UV aging. Melamine hydrogen bromide (MHB) and aluminum hypophosphite (AHP) are widely used as synergistic flame retardants. Hindered amine light stabilizers (HALS) are typically used as anti-UV agents for polyolefins. However, the direct combination of acidic MHB and basic HALS induces antagonistic interactions, leading to a deterioration in material performance. In this work, antagonism is mitigated by coating MHB with polysiloxane (Si-MHB). Moreover, the polysiloxane layer can improve the compatibility between the flame retardant and PP, thereby enhancing flame retardancy and mechanical properties. PP composites containing Si-MHB, AHP, and HALS derivative were prepared. After 60 h of UV exposure, the surface of PP/Si-MHB/AHP/HALS119 remained relatively smooth with some shallow cracks. The water contact angle was maintained at 92°, and the carbonyl index decreased to 10.45, pointing out that the degree of photodegradation was significantly lower than that observed in the control samples. Besides, the limiting oxygen index (LOI) of PP/Si-MHB/AHP/HALS119 reached up to 26.5 %. After 60 h of UV irradiation, LOI decreased to 24.8 % and still maintained UL-94 V-0 rating, the tensile strength and impact strength decreased by 7 % and 10.2 %, which was a significantly lower reduction compared to the control samples. The above results demonstrate that the coating polysiloxane can effectively mitigate the antagonistic interactions between MHB and HALS119, effectively enhancing the UV aging resistance, flame retardancy, and mechanical properties of PP composites.
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Desalination and Water Treatment
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2025
·
IF 1
Abdul Haleem,Jaweria Ambreen,Syeda Huma H. Zaidi,Mohamed Soliman,Nadeem Kizilbash,Daliyah Alruwaili,Jamith Basha,Syafiqah Saidin
The fabrication of macroporous materials exhibiting catalytic properties to degrade detrimental toxicants from water has gained significant interest. Herein, acrylamide-based pure cryogels were synthesized by UV-initiated free radical cryopolymerization method and were further incorporated with palladium nanoparticles employing the in situ chemical reduction method. The verification of the functional groups for the cryogels was done by using Fourier-transformed infrared spectroscopy. The formation of cryogels was confirmed by X-ray diffraction, energy-dispersive X-ray and transmission electron microscopic methods, respectively. The macroporous morphological analysis of cryogels was done by scanning electron microscopy. Moreover, Thermo-gravimetric analysis showed that palladium incorporated cryogels exhibit more thermal stability as compared to pure cryogels. The palladium incorporated cryogel was implemented for degrading an organic dye, Eosin Y. The catalysis efficiency of Pd-incorporated cryogels was also compared to a conventional Pd-embedded hybrid hydrogel. The impact of cross-linker content, temperature, and catalyst amount on degradation rate was studied by UV–visible spectroscopy. The degradation time for Eosin Y dye using 0.5 g of Pd-nanoparticles embedded cryogel with 3 % crosslinker content was 10 min at 25 º C. By considering their feasible UV-initiated synthesis route and adsorption enactment, the fabricated cryogel could be applied as a suitable prototype for water clean-up solutions.
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BIOMACROMOLECULES
·
2025
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IF 5.4
Wenqian Chen,Zi Ye,Lixiong Gao,Yuhang Jiang,Yue Wei,Xuejun Chen,Liqin Li,Tengfei Mao,Zhaohui Li
The corneal epithelium, the outermost barrier of the eye, is particularly susceptible to UV-induced photodamage. Owing to the limited protection provided by physical defense strategies, there is a critical need for effective UV-protective ocular medications. In this study, novel fluorescent copolymers were synthesized and evaluated for their anti-UV properties in human corneal epithelial (HCE-T) cells. These copolymers provided substantial protection to HCE-T cells against damage from various types of UV radiation. The protective effects were attributed to their ability to attenuate oxidative damage caused by UVA radiation and mitigate direct DNA damage induced by UVB and UVC radiation. Mechanistic investigations revealed that their antioxidant and DNA repair activities are mediated through the regulation of the PERK and NER signaling pathways. These findings underscore the potential of these functional polymers as promising ophthalmic agents against broad-spectrum UV-damage.
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DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2024
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IF 5.5
Leonardo Togar Samosir,Ferry Anggoro Ardy Nugroho,Vivi Fauzia
Electrochemical water splitting, a key process for extracting hydrogen energy from water, is recognized as a promising eco-friendly technology. Molybdenum disulfide (MoS 2 ), especially when possessing abundant defects, emerges as a cost-effective and efficient catalyst for hydrogen evolution reaction (HER), presenting a viable alternative to noble metals such as platinum (Pt). However, the impact of UV-Ozone (UVO) in generating defects in bulk 2H-MoS 2 remains underexplored. Here, we successfully synthesized 2H-MoS 2 using the hydrothermal method on a 3D conductive carbon cloth. Subsequently, the sample underwent UVO treatment for three different durations of 10, 30, and 50 min. Our results demonstrate that a 50-minute exposure to UVO yields the most effective HER performance, with a significant decrease in the onset potential from 189 mV to 116 mV and a low Tafel slope of 64 mV/decade. This enhancement is attributed to increased surface activity, evident in a more than fourfold increase in double-layer capacitance ( C dl ). Importantly, the 50-minute UVO treatment not only significantly improves the purity of MoS 2 and increases the number of edge sites, but also lead to an increase in sulfur vacancies and the formation of amorphous oxygen-incorporated MoS x . These edge sites, along with sulfur vacancies and oxygens incorporation, are considered ideal for hydrogen binding, enhancing electron transport, and improving HER activity.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Zixuan Zou,Xuejing Wei,Jiayi Yao,Li Sun,Hua Wang,Shaohua Chen,Luoxin Wang
In order to improve the mechanical properties and UV resistance of polylactic acid (PLA) composites, a bio-based additive (ESO-CUR) was synthesized by one-pot method. A new environment-friendly toughening agent was synthesized by using epoxy soybean oil (ESO) as the core material and curcumin (CUR) as the curing agent. PLA composite material with toughening and UV resistance was prepared by melt blending process. Among them, the elongation at break of 6%ESO-CUR/PLA reached 20.26% in the tensile test, which was 11.8 times higher than that of pure PLA. In addition, 6%ESO-CUR/PLA has excellent UV resistance, and the UV protection factor (UPF) is increased from 3.1 to 15,485 of pure PLA. The results show that the new environmental protection toughening agent has a significant synergistic effect on improving the mechanical properties and UV protection properties of PLA. In order to reduce the white pollution caused by traditional plastics, it provides a new way to prepare biodegradable materials with excellent properties.
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JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Mengbin Gu,Ge Yuxi,Gang Yu,Jun Huang
Ultraviolet-activated persulfate (UV/PS) represents a promising advanced oxidation process (AOP) for the elimination of toxic and bio-refractory organic pollutants in wastewater due to the advantages of SO 4 • - . C7 HFPO-TA, one of the latest alternatives to PFOA in fluoropolymers production, with a unique structural fragment (CF 3 O-CF(CF 3 )-) that has been frequently identified in effluents, surface waters, and sediments in proximity to fluorochemical industrial zone. In this study, we evaluated the degradation of C7 HFPO-TA and co-existing PFHxA in AOPs, mainly focusing on the molecular structure effect on the chemical affinity with different reactive species (RSs). The results showed that >99.9% C7 HFPO-TA and PFHxA could be decomposed after 480 min in UV/PS, significantly outperforming UV/H 2 O 2 (<10%), as the result of the synergistic effect of radical/non-radical (SO 4 • - /HSO 4 •, O 2 • - , HO•, 1 O 2 ) and chain reactions. The degradation mechanism of C7 HFPO-TA was primarily governed by the DHEH mechanism, which facilitated radical chain reactions and resulted in the formation of a new perfluoroalkyl ester intermediate (C 6 F 12 O 3 ), as optimized by Transition State theory. The degradation of five HFPO and three PFCA was highly dependent on their molecular structures. Degradation kinetics and DFT calculations demonstrated the longer branched fluorocarbon chain could diminish the steric hindrance of α-CF 3 in HFPO and made the electron distribution more flexible for the reaction with the RSs. The comprehensive analysis of degradation kinetics, theoretical calculations and intermediates analysis elucidated the transformation mechanisms of C7 HFPO-TA and PFHxA in UV/PS.
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PubMed
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Journal of Water Process Engineering
·
2025
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IF 6.7
Youwei Yang,Jianxing Wang,Yan Gao,Xuekun Tang,Chunying Wang,Xianping Luo
ZnFe 2 O 4 catalysts synthesized via hydrothermal (ZFO-H) and sol-gel (ZFO-S) methods were employed to activate peroxodisulfate (PDS) under UV light for the efficient conversion of low-concentration NH 4 + -N into environmentally benign N 2 , offering a promising solution for advanced wastewater treatment. Characterization revealed that the sol-gel-derived ZFO-S exhibited uniform agglomeration, smooth surfaces, and an 80% reduction in surface hydroxyl density (as indicated by the FTIR peak area at 3320 cm -1 ), outperforming both hydrothermally prepared and commercial ZnFe₂O₄ (ZFO-H and ZFO-M, respectively). This study addresses the critical challenge of ammonia nitrogen removal in wastewater, where conventional methods often struggle with low efficiency or secondary pollution. Mechanistic studies demonstrated that ZnFe 2 O 4 facilitated electron transfer at Zn sites to activate PDS, generating reactive species dominated by singlet oxygen ( 1 O 2 ), which drove NH 4 + -N oxidation. Density functional theory (DFT) calculations further elucidated the reaction pathway, highlighting preferential adsorption of NH 3 at oxygen sites on the ZnFe 2 O 4 (311) surface, followed by sequential dehydrogenation and coupling to form N 2 . Under optimal conditions (pH >9.25, 10 mM PDS, 25°C, 3 h), 97.40% of initial 50 mg/L NH₄ + -N was converted to N₂, with negligible NO 3 − byproduct formation (< 6%), demonstrating high feasibility for practical wastewater remediation. The reduced surface hydroxyl groups and lower work function of ZFO-S enhanced electron transfer, underscoring its superior catalytic activity. This work provides a novel strategy for designing hydroxyl-regulated photocatalysts tailored for wastewater treatment and advances the mechanistic understanding of persulfate-based ammonia nitrogen remediation in engineered water systems.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Huaqing Liu,Wei Liu,Dechao Hu,Wenshi Ma,Bangjun Deng
Zinc oxide@polydopamine (ZnO@PDA) core-shell nanoparticles (NPs) were prepared by depositing PDA on the surface of ZnO NPs via the self-polymerization of dopamine (DA) in alkaline solution. It was found that ZnO@PDA exhibits lower photocatalytic activity and higher UV absorbance than pure ZnO. Moreover, ZnO@PDA NPs could be homogenously dispersed in poly(vinyl alcohol) (PVA) matrix and form strong hydrogen bonding interaction with PVA molecular chains . As a result, the prepared PVA/ZnO@PDA composite films display excellent UV-shielding, mechanical and anti-UV aging properties. Particularly, the PVA composite film added with 2.0 wt% ZnO@PDA is able to shield 96.1% UV irradiation (200–400 nm) and exhibits superior tensile strength (66.3 Mpa) than pure PVA film. Moreover, the result of UV aging tests indicate that ZnO@PDA also give a positive effect on the UV stability of PVA matrix, while PVA/ZnO composite film shows serious degradation. This work proposed a facile and rational strategy to design the ZnO-based UV-shielding agent with reduced photocatalytic activity and enhanced UV absorbance, which may provide an inspiration to construct high performance UV-shielding composites.
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POLYMER
·
2022
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IF 4.432
Jie Liu,Pengcheng Miao,Wenwen Zhang,Guanjun Song,Jiale Feng,Xuefei Leng,Yang Li
Interpenetrating polymer networks (IPNs) are a non-bonded combination of two or more cross-linked polymers and have superior mechanical properties. Herein we synthesized a series of IPNs by a sequential UV-thermal dual-curing method, which is consisted of UV curable resin network and polyurethanes (PU) network. Blocked isocyanate (BI), polyols , and UV curable resin solutions were mixing completely, the resulting mixture was exposed to UV light to obtain a single network. Then the double network was formed via thermally triggered reaction of deblocking-isocyanate and polyols . The effect of polyol hydroxyl number (from two to six) on properties of IPNs was systematically studied. The results exhibit that pentaerythritol as polyol can be dual-cured by UV and heating to give the highest tensile strength (17.5 MPa), of a 21% increase compared to unheated sample. Furthermore, a series of semi-interpenetrating networks (semi-IPNs) were obtained by using polytetramethylene ether glycol (PTMEG) instead of the polyols. The results showed that introducing interpenetrating or semi-interpenetrating networks exhibit improved mechanical properties of the UV curable resin. Besides, the deblocking temperature of BI is just appropriate for the 3D-printing temperature.
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Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 14
·3590-3597
·
IF 7.779
Qiang Wang,Wen Song,Yang Lan,Liling Cao,Ling Huang,Daojiang Gao,Jian Bi,Guohong Zou
KBe2BO3F2 (KBBF) with a perfect honeycomb hexagonal layered structure is the sole practical deep-ultraviolet (DUV) nonlinear optical material which could generate DUV coherent light through direct frequency doubling. However, the layered growth habit and the toxicity of Be severely hinder its extensive applications. Herein, a non-centrosymmetric fluoride carbonate, KLi2CO3F, was successfully developed via chemical co-substitution with KBBF as the prototype. KLi2CO3F preserves the structural merits of KBBF, containing neatly arranged infinite planar [Li2CO3F2]∞ layers. In particular, compared with the weak interlayer K–F electrostatic attraction in KBBF, KLi2CO3F presents a stronger interlayer binding energy induced by the shorter and stronger Li–F bonds, which effectively overcomes the layered tendency of crystal growth. Simultaneously, KLi2CO3F exhibits a large birefringence of approximately 0.102@546 nm and a short ultraviolet absorption edge down to 190 nm, indicating that it is a promising DUV birefringent material.
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