CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiawei Li,Chengyu Hong,Hao Zhang,Jiaqi Zhang,Ruixue Zhai,Bin Fei,Chao Zhou
The increasingly severe energy shortage and growing environmental problems have accelerated the rapid development of sustainable polymer materials. Hereon, a novel method was proposed for the synthesis of cashew nut shell oil-based waterborne polyurethane (WPUs), which exhibited excellent toughness, transparency, water resistance, UV resistance and corrosion resistance. Specifically, the sorbitan monooleate-based siloxane (MSP) was prepared via a thiol-ene click chemistry reaction. Subsequently, the plant-based phloretin (PRT) and MSP were introduced as polyols into the skeleton of WPUs through the molecular structure design strategy. Series of high bio-based content (91 %) WPUs networks were obtained via pre-polymerization and self-emulsification methods. The properties of their dispersions and films were thoroughly investigated, and it was found that the addition of MSP and PRT enhanced the overall performance of WPUs film. For instance, there was a significant increase in T g . Additionally, they exhibited a maximum tensile strength of 31.5 MPa and a maximum toughness of 53 MJ/m 3 , which were the most outstanding among all reported plant oil-based WPU systems so far, indicating excellent tear resistance. Interestingly, the water absorption rate of PSWPU-40 was reduced to 7.1 %, suggesting good water resistance, which resolved the contradiction between the mechanical properties and water resistance of the current plant oil-based WPU systems. The PSPWU films exhibited promising application prospects, exemplified by its ability to effectively shield the entire UV range. Furthermore, its coating demonstrated outstanding anti-corrosion properties with a maximum anticorrosion efficiency of 97.1 %. It could be attributed to the synergistic effect of a self-crosslinking structure, higher crosslinking density, a tighter network structure, and stronger intermolecular forces (H-bond). This work provided a meaningful guide for the application and development of high-performance bio-based WPU functional coatings.
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高影响因子
POLYMER
·
2025
·
IF 4.5
Mingxuan Yu,Jiaqi Li,Mengyao Zhang,Xin Song,Chao Zhou,Li Liu,Guangfeng Wu
Bio-based waterborne polyurethane (WPU) has been instrumental in enhancing the adhesion between carbon fibers (CF) and the epoxy resin matrix (EP). However, conventional waterborne polyurethane sizing agents are susceptible to photochemical oxidation and degradation under prolonged ultraviolet (UV) exposure, leading to a gradual decline in interfacial properties. This instability limits their effectiveness in extreme environments. In this study, a novel carbon fiber sizing agent based on hyperbranched bio-based waterborne polyurethane zinc (WPUZ) was developed. By incorporating tartaric acid (TA) and zinc oxide (ZnO) through a chelation strategy, the CF/EP composites achieved simultaneous interfacial reinforcement and UV protection. Fourier transform infrared (FTIR) spectroscopy confirmed the formation of stable zinc carboxylate (-COO - Zn 2+ ) bonds between TA and ZnO, preventing ZnO nanoparticle aggregation and improving dispersion within the waterborne polyurethane matrix. Mechanical testing revealed that WPUZ-treated CF/EP composites exhibited significant improvements, with interfacial shear strength (IFSS), interlaminar shear strength (ILSS), and three-point bending strength increasing by 93.92 %, 46.00 %, and 53.42 %, respectively. Furthermore, UV aging tests demonstrated that after one week of xenon lamp exposure, the ILSS of WPUZ-treated composites remained above 92 %, far exceeding the performance of untreated and pure WPU-sized composites. These results highlight the effectiveness of WPUZ in enhancing both mechanical durability and UV resistance in CF/EP composites.
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Separation Science Plus
·
2025
·Vol. 8
·期 4
·e70035
·
IF 1.6
Bingqian Zhou,Yuncan Chen,Minghui Yu,Jie Tang,Lijun Zhu,Shaomin Liu,Yangyang Xue,Changguo Wang,Rui Yang
A new method utilizing magnetic molecularly imprinted solid-phase extraction (SPE) with ultraviolet–visible (UV–vis) spectrophotometry was developed to selectively extract, preconcentrate, and detect nicotinamide (NAM) in human plasma samples. To selectively adsorb NAM, novel magnetic molecularly imprinted polymers (Fe 3 O 4 @MIPs) were synthesized. The as-prepared Fe 3 O 4 @MIPs exhibited a uniform core–shell structure with a polymer layer thickness of approximately 20 nm. The magnetic susceptibility of Fe 3 O 4 @MIPs was 7.7 emu/g, which can meet the need for rapid separation. Fe 3 O 4 @MIPs had an adsorption capacity of 411.8 mg/g, which was 232.7 mg/g larger than that of Fe 3 O 4 @NIPs. Moreover, Fe 3 O 4 @MIPs can achieve adsorption equilibrium within 15 min and exhibit good selectivity for NAM. On the basis of the above results, Fe 3 O 4 @MIPs were chosen as magnetic SPE adsorbent to selectively extract NAM from human plasma samples under the optimal experimental conditions, followed by concentration analysis using a UV–vis spectrophotometer. The validation experiment demonstrated that the proposed method had a broad linear range (50 ng/mL to 30 µg/mL), a low detection limit (8.2 ng/mL), and good recovery (92.8%–103.2%). Besides, the recovery of NAM by Fe 3 O 4 @MIPs remained above 85.2% even after five adsorption–desorption cycles. These results indicate that the proposed method, with its simplicity, rapidness, and low cost provides a potential prospect for extraction and accurate detection of targets in complicated samples.
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PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Chang-an Xu,Wenzi Liang,Xiankun Wu,Enxiang Jiao,Mangeng Lu,Kun Wu,Xiaopeng Hao,Jun Shi
At present, the energy crisis is becoming increasingly outstanding, and the expanding market of pressure sensitive adhesives (PSAs) puts forward higher requirements for biomass materials. Vanillin comes from biomass raw materials, and it has been widely used in related research fields. So far, there are few reports on the preparation of novel monomers containing Schiff base structure from silicone and vanillin. In this work, vanillin reacts with methacrylic anhydride to prepare monomers with double bond structure, and furthermore a fresh type of silicone/vanillin monomer is prepared by aldehyde-amine condensation reaction . Finally, the novel monomer is introduced into polyurethane matrix, and a series of silicone/vanillin-based PSAs are prepared under UV conditions. The results show that the introduction of silicone/vanillin monomer can improve the residual carbon rate of PSAs, and the residual carbon rate of PUPG-C is as high as 12 wt%. Moreover, by comparison to the control group PUPG-0, the ball number, 180° peel strength and shear strength of PUPG-A are increased by 120.0 %, 215.0 % and 49.8 %, respectively. It is worth noting that the 180° peel strength of PSAs on functionalized glass has been strengthened, which greatly promotes the application of PSAs on functionalized glass. In short, this work provides a simple, versatile and extensible method for designing PSAs with silicone/vanillin structure in the future.
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高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 7
·1-11
·
IF 5.479
Xing Xinxin,Yang Yue,Zou Tong,Wang Zhezhe,Wang Zidong,Zhao Rongjun,Zhang Xu,Wang Yude
Thioglycolic acid-functionalized ZnSe quantum dots (QDs) as a colorimetric nanoprobe were prepared and applied to the determination of cobalt(II) and iron(III). Test strips were obtained by a dipping-drying process. On exposure to Co(II), they undergo a color change from white to brown, and on exposure to Fe(III) from white to pink. The limits of detection (LOD) are 2.6 mg L −1 for Co(II) and 2.2 mg L −1 for Fe(III). Test strips introduce a low-cost, portable, rapid and convenient tool for determination of Co(II) and Fe(III). In addition, two other analytical methods have been studied for detection of Co(II) and Fe(III) at low concentration. The first is UV-vis spectrometry which has a LOD as low as 0.14 mg L −1 for Co(II) (at 412 nm) and 0.12 mg L −1 for Fe(III) (at 400 nm). The second is dynamic light scattering (DLS) with a LOD of 3.0 μg L −1 for Co(II) and 2.5 μg L −1 for Fe(III).
Thioglycolic acid-functionalized ZnSe quantum dots (TGA-ZnSe QDs) show high sensitivity and low detection limits for Co 2+ and Fe 3+ .
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高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Jing Feng,Sheng Yao,Xiaohan Mei,Jiacheng Xie,Xujie Wang,Huitian Zhi,Ruhui Shang,Yingchao Yang,Lei Hu,Zhengquan Yan
To conveniently monitor and remove toxic Hg 2+ and S 2− in food samples, Au Ag quantum-dot nanozyme (Au-Ag@FA QDs) was identified. The strong synergistic effect among folic acid (FA), Ag and Au endowed Au-Ag@FA QDs with superior peroxidase-mimic activity to accelerate 3,3′,5,5′-tetramethylbenzidine (TMB) redox with K m / V max of 0.28 mmol·L −1 /6.40 × 10 −8 mol·L −1 ·s −1 . Trace Hg 2+ or S 2− could selectively alter its peroxidase-like activity and inherent fluorescence performance, with obvious hyperchromic/“turn-on” fluorescent effect for Hg 2+ or hypochromic/“turn-off” one for S 2− . And red-green-blue (RGB) values analyzed from smartphones changed regularly with c Hg 2+ or c S 2− . Under the optimized conditions, Au-Ag@FA QDs were successfully applied for multi-mode UV–vis, fluorescent, and RGB monitoring of Hg 2+ or S 2− in food samples. The detection limits were 7.38 × 10 −7 /5.74 × 10 −8 /4.93 × 10 −6 g·L −1 and 1.99 × 10 −6 /4.48 × 10 −8 /5.79 × 10 −6 g·L −1 respectively. Importantly, over 93.8 % Hg 2+ or 90.5 % S 2− could be removed by simple centrifugal-separation after detection. The selective recognition mechanisms to Hg 2+ and S 2− were also proposed.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Min-Yong Lee,Wen-Long Wang,Qian-Yuan Wu,Nan Huang,Zi-Bin Xu,Hong-Ying Hu
Dodecyl dimethyl benzyl ammonium chloride (DDBAC), a non-oxidizing biocide, is commonly used in municipal wastewater reverse osmosis system. It has been used also as an ingredient in fabric softeners, disinfectants, detergents, phase transfer agent and numerous personal skin care products. In this study, the DDBAC degradation efficiency achieved using UV and persulfate (PS) oxidation processes was investigated. Substantial synergistic effects on DDBAC degradation were found when UV and PS oxidation processes were combined. During the UV/PS process, UV photolysis and reactions with radical species accounted for 42.7% and 57.3%, respectively, of DDBAC degradation. The OH and SO 4 − radicals accounted for 4.6% and 52.7%, respectively, of DDBAC degradation. The calculated k OH,DDBAC and k SO 4 - ,DDBAC rate constants were (1.45 ± 0.16) × 10 9 and (1.51 ± 0.02) × 10 9 M −1 s −1 , respectively. The k obs rate constant for DDBAC degradation increased from 0.047 to 0.150 min −1 when the PS dose was increased from 0.05 to 1.45 mM. The presence of natural organic matter (NOM), HCO 3 − /CO 3 2− , and NO 3 − adversely affected DDBAC degradation. Five main intermediates were identified by high performance liquid chromatography quadrupole time-of-flight tandem mass spectrometry. The proposed DDBAC degradation pathway involves benzyl-nitrogen bond cleavage (or subtraction of hydrogen from the alkyl chain), demethylation, hydroxylation, and hydrogen subtraction. UV/PS treatment decreased the acute toxicity of the DDBAC solution in less than 15 min. However, the residual toxicity indicated that toxic oxidation transformation products were formed when DDBAC was treated using the UV/PS process.
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EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Jie Liu,Jun Yang,Zijia Zhang,Qian Jiang,Lele Sun,Chaoyi Peng,Jin Wang,Li Xiang,Anlian Pan
In order to prepare polyimide materials with excellent optical transparency and UV barrier, the effects of the number and substitution position of −CF 3 groups on polyimide properties were investigated. Researchers synthesized four novel diamine monomers (BPA-O, BPA-NH 2 , BPAF-O, BPAF-NH 2 ) and synthesized eight high-performance colorless polyimides (PI-1 ∼ PI-8). On the one hand, the strong electron-withdrawing effect of −CF 3 restricts electron movement within the molecular chain, weakening the CTC effect of the molecular chain and thereby enhancing the transparency of the film. On the other hand, the ortho -substitution of −CF 3 on the imide ring induces greater twisting of molecular chains, disrupts their close packing, and thereby exerts a positive effect on enhancing the optical transparency of the film. The high bond energy of the C-F bond and the introduction of the flexible group −O- act as an “energy buffer,” suppressing UV-induced main chain breakage and achieving high UV barrier. All CPI films exhibit excellent transparency and thermal stability, with a cut-off wavelength range of 325 nm-381 nm and a transmittance range of 78.7 %-88 % at 550 nm. They have good optical properties, with T d5% distributed in the range of 511.5 °C − 533.7 °C, and the glass transition temperature ( T g ) distributed in the range of 197.3 °C-234.4 °C, demonstrating good thermal stability. Additionally, the cut-off wavelength is at a relatively high level, reaching up to 381 nm.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Hanye Ju,Yankun Zhang,Yongqiang Qin,Jin Liu,Yihou Tang,Inna M. Sokolova,Xiaoping Diao
UV filters, such as 4-Methylbenzylidene camphor (4-MBC), are emerging environmental contaminants that threaten marine life and ecosystem integrity. This study investigated metabolic disruptions in the liver of clown anemonefish ( Amphiprion ocellaris ) after exposure to 4-MBC (0, 10, 50 µg/L) for 7 or 14 days. Exposure led to 4-MBC accumulation and significant liver metabolic disturbances and endocrine disruption in the fish. Random forest analysis identified vitellogenin and testosterone levels as key factors distinguishing treatment groups. Molecular docking showed high binding affinity of 4-MBC to 17β-hydroxysteroid dehydrogenase and vitellogenin in the liver. Additionally, 4-MBC exposure reduced thyroid hormone levels and disrupted glucose and lipid metabolism, with more severe effects at 7 days compared to 14 days. Transcriptome analysis revealed that 4-MBC interfered with hepatic insulin sensitivity by disrupting pathways involving Insulin Receptor (INSR), Phosphoinositide 3-Kinase (PI3K), Insulin Receptor Substrate (IRS), and others. It also impacted genes related to lipid accumulation, gluconeogenesis, and lipid utilization. Furthermore, 4-MBC disrupted the endoplasmic reticulum (ER)’s protein degradation system, causing ER stress and activating lipogenic pathways, which enhanced lipid accumulation. The reduction in thyroid hormones and metabolic dysfunctions may impair the reproductive health and population stability of clown anemonefish. These findings underscore the potential ecotoxicity of 4-MBC and its adverse effects on coral reef fish populations, raising concerns about its environmental impact.
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高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 2
·1-9
·
IF 5.833
Senosy Ibrahim Abdelhai,Zhang Xin-Zhong,Lu Zhi-Heng,Guan Xiao-Yu,Yang Zhong-Hua,Li Jian-Hong,Guo Hao-Ming,Abdelrahman Talat Mahmoud,Mmby Mohamed,Gbiliy Asmaa
Fe 3 O 4 @MIL-100 (Fe)/PEI are used for the first time as an adsorbent material for the extraction of pesticide residues (epoxiconazole, flusilazole, tebuconazole, and triadimefon) from food matrices. The adsorbent proposed (Fe 3 O 4 @MIL-100(Fe)/PEI) was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), thermogravimetric (TG) analysis, and vibrating sample magnetometer (VSM) techniques to evaluate the properties of the sorbent. Then, the Fe 3 O 4 @MIL-100 (Fe)/PEI was employed for the quantification of the four triazole fungicides in fruits and vegetables (apple, orange, tomato, cabbage, and cucumber) using HPLC-UV for separation and detection. During the extraction process, the main parameters such as amount of adsorbent, extraction time, pH value, ionic strength, eluting solvent, and eluting volume were optimized. Under the optimum conditions, good linearity of this method was observed for all analytes, with correlation coefficients ( R 2 ) ≥ 0.9908. The limits of detection (LODs) ranged from 0.021–3.04 μg kg −1 . The extraction recoveries of the four triazole fungicides varied from 73.9 to 109.4% with relative standard deviations (RSD) in the range 0.5 to 6.2%. Compared with other MOFs, the modification of Fe 3 O 4 @MIL-100 (Fe) with PEI shows high efficient adsorption due to the combined benefits of MIL-100 (Fe) and PEI. The material is easily synthesized, has good stability, and is of low cost.
Graphical abstract
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Junsheng Guo,Wenzong Xu,Tao Yan,Jiayan Zhang,Xiaoyu Guo,Lingfeng Wang,Julan Liu
Polyvinyl alcohol (PVA) is a promising biodegradable polymer, but its widespread application is critically constrained by inherent flammability, limited UV resistance, and the mechanical compromises often incurred by conventional flame-retardant modifications. To address these challenges, a novel bio-based phosphorus‑nitrogen synergistic flame retardant (DPP) was developed from pyridoxal phosphate via a facile Schiff base condensation and P H addition route. This well-designed DPP was efficiently incorporated into PVA via a green melt blending process, yielding composites that achieved a simultaneous enhancement of multiple properties. With a 10 wt% DPP loading, the composite exhibited exceptional flame retardancy, achieving a limiting oxygen index (LOI) of 30.5%, a UL-94 V-0 rating, along with a 63.2% reduction in its peak heat release rate (PHRR) and a 32.7% decrease in total heat release (THR). Additionally, it provided outstanding UV shielding performance, with an ultraviolet protection factor (UPF) of 362 and over 99.7% blocking of both UVA and UVB radiation. Impressively, its tensile strength was enhanced to 25.2 MPa, thus overcoming the common performance trade-off. This multifunctionality stems from DPP's well-orchestrated molecular design: it operates through a vapor- and condensed-phase synergistic flame-retardant mechanism and intrinsic UV absorption, while its strong interfacial hydrogen bonding with PVA constructs a physical crosslinking network, underpinning the concurrent mechanical enhancement. This work presents a strategy for fabricating sustainable, high-performance, multifunctional PVA materials. The PVA/DPP composites obtained via this strategy show promising potential for advanced applications such as outdoor protection and safe electronics packaging.
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高影响因子
Plants-Basel
·
2025
·Vol. 14
·期 12
·1851
·
IF 4.1
Xinghai Zhang,Xinyu Feng,Yani Pan,Hanfei Wuzeng,Xinxin Wang,Anran Yan,Lin Xiang,Yaping Lin,Ping Chen,Qiang Chu,Liping Liu
Pu’er raw tea, a representative tea with a positive correlation between quality and storage time, has a unique aging process. It can not only reduce the heavy astringent taste of newly produced tea, but also has a complex and fragrant aging aroma. However, the extremely slow natural aging process often takes years or even decades for quality transformation, along with the risk of termite infestation, odor absorption, etc. This study found that UV-C irradiation could significantly accelerate the aging process of tea. It enhanced the richness of the aroma, while reducing astringency and creating a smoother and mellower taste. The results of substances analysis revealed an increase in key aroma compounds such as alcohols, aldehydes and terpenes, and a decrease in catechin and caffeine with UV-C irradiation, which is consistent with the natural aging trend. An efficient and safe rapid aging technology of Pu’er raw tea has been successfully established.
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高影响因子
危险品化学品经营许可证（带存储）