PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Dongcheng Yang,Chaoran Guo,Wei Gao,Likun Chen,Yongchao Zheng,He Zheng,Yan Cui,Yufeng Wu
Chemical warfare agents (CWAs) are highly toxic and prone to penetrate into and damage the coatings of various facilities, equipment, etc., which could also pose potential hazards to personnel. Developing protective coatings with good anti-penetration, transparency, and slipperiness properties remains a challenge. In this paper, a novel kind of coatings with both anti-penetration and liquid-like functions were prepared through the strategy of grafting fluorinated side chains as molecular brushes onto the cross-linking network. A fluorinated polysiloxane containing sulfhydryl groups was first synthesized and a series of polysiloxane coatings were prepared through UV-triggered thiol-ene click reaction employing different types of olefins crosslinkers. The coatings cured with trimethylcyclotrisiloxane and tetraallylsilane exhibited superior anti-penetration properties for simulants, due to their higher glass transition temperatures, increased crosslink density, smaller free volume and the lack of groups interacting strongly with simulants. These two coatings also exhibited liquid-like properties owing to the smooth surface and the presence of fluorine-containing segments, enabling the simulants slide down the tilted surface with almost no contaminated traces left on the coatings. The high transparency of the coatings would broaden the application prospects of these coatings. This article provides promising alternatives for polysiloxane-based protective coating materials.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xinqi Wang,Fuping Bian,Xinxin Cai,Jiwen Hu,Shudong Lin
The advent of the 5G era has significantly increased device power density and integration, intensifying heat dissipation challenges in electronic devices. The exploration and development of novel thermally conductive materials have become critical for the next generation of electronic devices. This work presents a novel method for the efficient and energy-saving preparation of advanced thermal conductive materials. A high-performance, thermally conductive bio-based UV-cured polymer (AESO-GAGMx) was synthesized from epoxy soybean oil (ESO) and gallic acid (GA). Its intrinsic in-plane thermal conductivity of 1.08 Wm −1 K −1 exceeds most reported polymer materials. Furthermore, composite films (A-BNx) with superior thermal conductivity were fabricated by the novel method, using AESO-GAGMx and hexagonal boron nitride (h-BN). This material shows potential for application in thermal management of electronic devices. The A-BNx composite thermally conductive film and its preparation method offer a novel approach to designing thermal management materials.
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PLANT PHYSIOLOGY AND BIOCHEMISTRY
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2025
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IF 5.7
Jiafei Qian,Chuanhong Ren,Fan Wang,Yunlin Cao,Yan Guo,Xiaoyong Zhao,Yilong Liu,Changqing Zhu,Xiaoying Li,Hongxia Xu,Junwei Chen,Kunsong Chen,Xian Li
Flavonol glycosides are secondary metabolites important for plant development and stress defense such as UV-B irradiation. UDP-glycosyltransferase (UGT) is the last enzyme step that catalyzes flavonol glycosides biosynthesis. Eriobotrya japonica is abundant in flavonol glycosides, but UGTs responsible for accumulation of flavonol glycosides remain unknown. Here, 13 flavonol glycosides including monoglycosides and diglycosides were characterized in different tissues of loquat by LC-MS/MS. UV-B irradiation significantly increased the accumulation of four quercetin glycosides and two kaempferol glycosides in loquat fruit. Based on UGT gene family analysis, transcriptome analysis, enzyme assays of recombinant proteins as well as transient overexpression assays in Nicotiana benthamiana , three UGTs were identified, i.e. EjUGT78T4 as flavonol 3- O -galactosyltransferase, EjUGT78S3 as flavonol 3- O -glucosyltransferase, and EjUGT91AK7 as flavonol 1→6 rhamnosyltransferase. This work elucidates the formation of flavonol glycosides in loquat through UGT-mediated glycosylation.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
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IF 4.6
Yiqing Wu,Xiangmei Ma,Bin Wang,Yanan Li,Shengtao Gao
The detrimental effects of ultraviolet (UV) and electromagnetic (EM) radiation on human health and physiological functions are well documented. The development of efficient shielding materials to mitigate these effects is therefore an urgent necessity. In this study, Zn/Ti-LDH@Ce/Fe-MOF@PPy composites were successfully prepared by hydrothermal synthesis and interfacial polymerisation. The properties of the composites were compared and analysed with those of pure Zn/Ti-LDH and Ce/Fe-MOF, and the results show that the prepared materials have excellent comprehensive properties, with a broad EAB of 5.2 GHz and a RL min of −46.2 dB at 14.8 GHz at the thickness of 3 mm, while exhibiting excellent UV shielding capability.The present study offers novel concepts and efficacious methodologies for the engineering of high-performance microwave absorbing and UV shielding materials.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Yunhe Zhang,Gaihuan Ren,Gaowei Nie,Shenpeng Hu,Dongxiang Li,Wen Sun,Zhanzhao Li,Zhenhua Cui,Dongxu Lu,Xiaohan Shi,Longwei Li,Hongqin Yu,Jianxin He
Membranes with good waterproofness and breathability are desired for the preparation of outdoor sports garments. However, current waterproof and breathable membranes use environmentally hazardous fluorine-containing raw materials and suffer from many problems such as complicated preparation processes and single function. Therefore, it is a great challenge to select environmentally friendly raw materials to prepare multi-functional membranes with waterproof-breathable performance by simple preparation method. In this paper, fluorine-free poly(styrene-b-butadiene-b-styrene) (SBS), polyurethane (PU), and 2-hydroxy-4-n-octyloxy benzophenone (UV531) were selected to prepare multi-functional nanofiber membranes by convenient one-step electrospinning. The properties of the environmentally friendly multi-functional SBS/PU/UV531 nanofiber membranes were systematically optimized by adjusting the concentration of UV531 in the nanofiber membranes. The ultimately obtained multi-functional SBS/PU/UV531–2 nanofiber membrane shows excellent waterproofness (hydrostatic pressure: 58.8 kPa), high breathability (WVT rate: 5.2 kg m −2 d −1 ), good mechanical properties (breaking strength : 7.26 MPa, breaking elongation: 327.9%), excellent UV resistance (UPF: 238.23), and strong acid and alkali resistance properties. This multi-functional nanofiber membrane has broad application prospects in a variety of fields such as outdoor protective clothing, extreme environment materials, and military products.
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Journal of Materials Chemistry A
·
2024
·
IF 10.7
Wei Guo,Zheng Zhang,Nian Li,Min Xi,Cui Liu,Shudong Zhang,Zhenyang Wang
Transparent materials accompanying ultraviolet and near-infrared (UV/NIR) shielding play a crucial role in sunlight management and are desirable for reducing energy consumption in buildings. Herein, a hollow flower-like core–shell hybrid, in which hollow TiO2 spherical cores are bonded with a CsxWO3 hierarchical nanosheet shell (h-TiO2@CsxWO3 hybrid), is prepared for high-efficiency absorption of UV/NIR light and corresponding transparent membrane-based UV/NIR light shielding for thermal management. Impressively, while maintaining high visible light transmission, the h-TiO2@CsxWO3 flower-like hybrids display the almost complete absorption of UV and NIR light caused by the multilevel synergistic scattering and absorption of incident light between the components. Next, to expand the application of building energy conservation engineering, the h-TiO2@CsxWO3 flower-like hybrids are spray-coated onto the surface of a PET film to serve as the membrane material, showing nearly 80% visible light transmission and complete shielding from UV and NIR light. As a proof of concept, based on the UV/NIR light absorbing shield strategy for thermal management, by transferring the as-prepared h-TiO2@CsxWO3/PET functional membrane as “window glass” on a home-made house model, a temperature reduction of ∼16.4 °C could be achieved relative to a blank house under 1 sun irradiation. Further, outdoor testing (Hefei, China) with simulated room temperatures below ∼25 °C throughout a full day's test cycle achieved a sub-ambient cooling temperature of ∼11.5 °C. Thus, both the solar radiation shielding capability and the combined outdoor service performance significantly advance the UV/NIR shielding strategy for real-world solar/thermal-management applications.
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Journal of Water Process Engineering
·
2024
·
IF 6.3
Jiahui Huang,Bufan Yang,Xin Ma,Xin Zhang,Sinong Huang,Erdeng Du,Xiaoyan Ma,Jing Deng
Antibiotics removal from wastewater by conventional methods is limited, and their lingering presence in the environment can be hazardous to both human health and the ecosystem. Sulfamethoxazole (SMX) is one of the primary study subjects for antibiotic contamination, the degradation behavior, mechanism, transformation pathway, disinfection byproducts (DBPs) formation and variations about toxicity in UV/nitrite (NO 2 − ) system were examined in this study. Compared with UV irradiation, the first-order reaction rate of SMX in UV/NO 2 − system rose from 0.0397 to 0.0528 min −1 . This enhancement was linked to the generation of reactive oxygen species (ROS) and reactive nitrogen species (RNS), which promoted the degradation. SMX removal was more favorable under high dissolved oxygen (DO) levels and acidic conditions. When NO 2 − concentrations ranged from 0.1 to 1.0 mM, the higher concentration was more favorable to the degradation. The addition of 10 mM of HA and HCO 3 − hindered the oxidation of SMX by 48.46 % and 26.85 %, respectively, while the addition of Cl − slightly accelerated the decay of SMX at certain concentrations (5, 10 mM). The results of HPLC-ESI-MS and DFT computation suggested three possible SMX degradation pathways, including nitrification, hydroxylation, and bond breaking (such as sulfonamide cleavage). The primary DBPs produced by the post-chlorination of SMX in UV/NO 2 − system were TCM (87.02 % of the total detected DBPs) with a minor quantity of DBPs containing nitrogen. The presence of bromide ions (Br − ) can lead to the production of highly toxic bromine containing disinfection by-products (Br-DBPs). After adding Br − in UV/NO 2 − system, 100 % of N-DBPs (TCNM, DCAN) and 93.43 % of C-DBPs (TCM, DCAA, TCAA) were converted to Br-DBPs (TBM, DBAA, TBAA, BDCM, DBCM), with the production of Br-DBPs accounting for 82.63 % of the detected DBPs.
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POLYMER COMPOSITES
·
2024
·
IF 4.8
Yanqin Shi,Yiyi Zhao,Meng Ma,Si Chen,Huiwen He,Yulu Zhu,Xu Wang
For preparing high performance LLDPE film, the photocatalytic activity and the UV absorption capacity of TiO 2 were regulated by the alumina coating content on the surface of TiO 2 . Alumina-coated TiO 2 was prepared by the chemical liquid deposition method, and characterized by element analysis, TGA, FTIR, and morphology observation. The alumina coating layer had been proven to covalently bind to the surface of TiO 2 through Al O Ti bonds, which formed a continuous and dense coating layer, followed by forming a loose flocculent coating layer with the increase of alumina content. The alumina coating layer could significantly reduce the formation of carbonyl group on the LLDPE chains, and enhance UV aging resistance of LLDPE by inhibiting the photocatalytic activity of TiO 2 . Moreover, the dispersion of alumina-coated TiO 2 in the LLDPE matrix was improved. Thus, the transmittance of LLDPE/alumina-coated TiO 2 composites was reduced and the whiteness was improved. Importantly, the continuous and dense alumina coating layer was enough to inhibit the photocatalysis effect of TiO 2 on LLDPE. The further increase of alumina coating content reduced the UV absorption capacity of alumina-coated TiO 2 and its compatibility with the LLDPE matrix. Therefore, the best alumina coating content on the surface of TiO 2 was 1.46 wt% for preparing high performance LLDPE/TiO 2 composites. Highlights Alumina-coated TiO 2 with controllable coating thickness was successfully synthesized. LLDPE/alumina-coated TiO 2 has excellent UV aging resistance and mechanical properties. The photocatalytic activity and UV absorption capacity of TiO 2 could be regulated. 1.46 wt% of alumina coating is the best content for high performance LLDPE/TiO 2 composites.
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PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Lei Xia,Tianyi Lu,Miqiu Kong,Jingke Pei,Yajiang Huang,Yanhua Niu,Yadong Lv,Guangxian Li
Despite extensive research on the impact of environmental weathering on the degradation of electromagnetic wave absorbing (EWA) coatings, the influence of material composition on their service stability remains underexplored. In this study, we prepared EWA coatings with epoxy resin as the matrix and flaky carbonyl iron (FCI) as the absorber, at concentrations of 50 wt%, 60 wt%, and 70 wt%. These coatings underwent a 192-h combined UV irradiation-salt spray accelerated aging test to examine the effects of varying absorber concentrations on their corrosion behavior and mechanisms. Surface morphology, chemical structure evolution, and corrosion diffusion were analyzed using X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) with energy-dispersive X-ray spectroscopy (EDX). Corrosion behaviors and their impact on wave absorption performance were further investigated using electrochemical impedance spectroscopy (EIS) and electromagnetic simulations. Our results show that increasing FCI content accelerates the corrosion rate of the composite coating. This acceleration is attributed to the reduced protective effect of the epoxy matrix at higher FCI concentrations and the defects caused by FCI corrosion, which facilitate the penetration of corrosive media. This study elucidates the influence of varying absorber concentrations on the weather resistance of the coatings and their microscopic mechanisms, providing valuable insights for optimizing the service stability of EWA coatings.
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LANGMUIR
·
2025
·
IF 3.9
Huiyu Yang,Rong Chen,Guowen Yu,Xiaohua Cheng,Liangang Zhao,Hai Liu,Bo Deng,Zushun Xu,Chunli Gong
Daytime radiant cooling achieves a sustainable cooling effect by reflecting sunlight and radiant heat. However, absorption of sunlight by emitters and parasitic heat gain can significantly reduce radiative cooling temperatures. To improve the light reflectivity and emissivity in the mid-infrared band, SNF@TiO2 aerogel with high stability and efficient radiative cooling effect was constructed using nanosilk and titanium dioxide. The hierarchical structure of the aerogel stores more air, which reduces the thermal conductivity (0.0333 W·m–1·K–1) and parasitic heat gain. TiO2 provides excellent UV resistance while increasing solar reflectance and atmospheric window emissivity. The average solar reflectance and average IR emissivity of SNF@TiO2 were 89.4 and 92.3%, respectively. Compared with the subambient (I: 800 W·m–2, PE-covered air) temperature, the average cooling temperature of SNF@TiO2 under direct sunlight reached 11.5 °C. Meanwhile, the outdoor subambient (I: 900 W·m–2, PE-covered air) average temperature drop of SNF@TiO2 reached 12.1 °C after UV (40 mW·cm–2) continuous radiation for 10 days (6 h per day), displaying highly stable radiative cooling properties. In addition, the SNF@TiO2 aerogel has good mechanical elasticity and thermal insulation properties. This study offers great potential for silk fiber materials for outdoor radiant heat management.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2025
·Vol. 23
·期 1
·1-16
·
IF 12.6
Zhang Jie,Yin Yi-jing,Wang Xing-wang,Lu Wei-qi,Chen Zhao-yang,Yu Chao-hui,Ren Ke-feng,Xu Cheng-fu
Administering medication precisely to the inflamed intestinal sites to treat ulcerative colitis (UC), with minimized side effects, is of urgent need. In UC, the inflammation damaged mucosa contains a large number of amino groups which are positively charged, providing new opportunities for drug delivery system design. Here, we report an oral drug delivery system utilizing the tacrolimus-loaded poly (lactic-co-glycolic acid) (TAC/PLGA) particles with an adhesion coating by in situ UV-triggered polymerization of polyacrylic acid and N-hydroxysuccinimide (PAA-NHS). The negatively charged carboxyl groups effectively interact with the positively charged focal mucosa, and the NHS ester groups form the covalent bonds with the amino groups, thereby synergically enhancing the adhesion of the PLGA particles to the focal mucosa. Our findings reveal that, compared to the naked particles, the PAA-NHS coating increases the adhesion of particles to the inflammatory intestine. In a dextran sulfate sodium-induced acute colitis mouse model, the TAC/PLGA particles with PAA-NHS coating exhibits substantial retention of TAC within the inflammatory intestine, enhancing drug delivery efficiency and therapeutic effects. This approach holds promise for UC management, minimizing systemic side effects and optimizing therapeutic outcomes. Graphical abstract
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Bingying Li,Jingyuan Liu,Qi Liu,Jiahui Zhu,Jing Yu,Shusen Chen,Yan Song,Rumin Li,Jun Wang
Extracting uranium from natural seawater and wastewater is an effective approach to alleviating the current energy crisis and promoting green development in the nuclear industry. Herein, novel collagen fibers (CFs)-based strong alkaline ion-exchange fibers (CFs-SAA-IEF) were prepared through free radical polymerization initiated by ultraviolet light irradiation and an amination reaction. The CFs-SAA-IEF fibers exhibited an impressive adsorption capacity of 675.68 mg g −1 at pH = 8, along with exceptional selectivity, achieving a K d value of 1.24 × 10 4 mL g −1 . Notably, due to the ion-exchange effect, CFs-SAA-IEF showed rapid adsorption kinetics, achieving a uranium removal rate of 85.9 % within 120 min. Meanwhile, the incorporation of quaternary ammonium groups imparted the adsorbents with excellent antibacterial properties even in complex aqueous environments. In addition, CFs-SAA-IEF demonstrated an exceptional adsorption performance and a high removal rate of uranium in wastewater and seawater by fixed-bed column adsorption system. Based on the XPS spectra and DFT calculation, uranyl ions are captured by the adsorbents through chemisorption, involving the ion exchange of chloride ions with uranyl ion complexes. In summary, the CFs-SAA-IEF fibers are promising candidates for the efficient recovery of uranium from seawater and wastewater.
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危险品化学品经营许可证（带存储）