EUROPEAN POLYMER JOURNAL
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2024
·
IF 5.8
Zhixia Gong,Tiaozhen Yu,Zhi Cai,Ying Yi,Jingli Zhang,Weiquan Cai,Yihua Yin,Guanghua He,Yaqi Xiao,Peiyu Xu,Huiyi Wu,Sihui Lin
Photoactivated pesticides with high activity, environmental friendliness, and no drug resistance represent the direction of pesticide development. However, poor photostability and lack of targeting ability greatly restrict their practical application. Herein, a novel amphiphilic photoactivated polymeric propesticide was synthesized by conjugation of mPEG with the photo/enzyme-labile o-nitrobenzyl ester group followed by grafting protoporphyrin IX (PpIX), which could self-assemble into photo/esterase responsive polymer micelles in aqueous solutions for a controlled release of PpIX. The fluorescence quenching caused by the aggregation of PpIX into hydrophobic core could enhance its photostability. UV/esterase stimulation could trigger the release of PpIX and restore its photodynamic activity. Compared to a single stimulus, dual stimulation could trigger more PpIX release and resulting in higher photodynamic activity and antibacterial effect. In addition, light exposure also showed little influence on the photodynamic activity and antibacterial effect of the system due to enhanced photostability. Compared with PpIX, the nanosystem exhibited higher wettability and retention ability on plant leaves and could resist rainwater washout. Weed control experiment also demonstrated that the system’s control effect on barnyard grass. Therefore, this study provides new ideas for promoting the application of photoactivated pesticides in the field of plant protection.
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JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Shang-yu Chen,Liang Li,Mai Feng,Ting Huang,Nan Zhang,Yong Wang
Enhancing the hydrophilicity/underwater superoleophobicity of fibrous membranes not only boosts their anti-contaminant property during oil/water separation, but also enhances their removal ability toward water-soluble pollutants. Here, a novel kind of electrospun polysulfone/titanium dioxide (PSF/TiO 2 ) composite membranes with UV-activated superwetting ability were fabricated by depositing spherical TiO 2 nanoparticles on the surface of PSF electrospun fibers through hydrothermal reaction . After activated by UV irradiation, the PSF/TiO 2 composite membranes (FPT-A-UV) exhibited amphiphilic features with water contact angle (WCA) and oil contact angle (OCA) approaching 0° in air while under-water oil contact angle (UWOCA) and under-oil water contact angle (UOWCA) exceeding 150°, respectively. The composite membranes showed high removal ability toward methylene blue (MB). Under the complex condition in purifying the emulsion containing MB, the removal ratio of MB achieved 90.8 % with water flux of 780.3 (L m −2 h −1 ). The FPT-A-UV composite membranes also exhibited good demulsification effects on various emulsified solutions. It is reasonable to expect that the composite membrane has satisfactory application prospects in wastewater purification, especially in harsh environments.
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CARBOHYDRATE POLYMERS
·
2025
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IF 12.5
Haidong Jin,Guangshi Sun,Qizheng Tang,Shanrong Wang,Shouxin Liu,Qian Cheng,Lijuan Wang,Yu Li
Chiral nematic cellulose crystals (CNCs) have presented broad application prospects in information encryption, sensing and coating field due to their properties of tunable structural color, birefringence and sustainability and renewability. However, the controllable regulation of structural colors and the incorporation of functionalities still pose challenges for practical applications. Herein, we propose a facile method utilizing plant polyphenols to regulate the pitch of chiral nematic liquid crystal films, thereby enabling precise control over the structural color. The influence of varying amounts of tannic acid (TA) incorporation on the structure and optical properties of CNC iridescent films was investigated, and the underlying mechanisms were elucidated. Notably, TA enhances the UV absorption of the composite film, demonstrating nearly complete UVB absorption and partial UVA absorption. Furthermore, the films exhibit potent antibacterial activity against both Gram-positive and Gram-negative bacteria. The incorporation of polyphenol TA not only endows the composite film with outstanding antibacterial and UV-resistant properties but also allows for tuning the structural color of CNC films. The tunable structural color, along with the antibacterial and ultraviolet resistance properties exhibited by CNC-TA chiral cholesteric films, provides new prospects for anti-counterfeiting labels and multifunctional coating applications.
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高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Bingyang Liu,Pengfei Li,Jinsong Zeng,Jinpeng Li,Kefu Chen
Significant advancements in flexible photoelectric devices have been achieved through extensive research on flexible transparent conductive electrodes (FTCEs) based on silver nanowires (AgNWs). However, two key challenges that need to be addressed are the high contact resistance of AgNWs and poor interface adhesion between AgNWs and the flexible substrate. In this study, we present a composite electrode comprising polydopamine-grafted cellulose nanofibers (PDA-TCNF) and AgNWs, fabricated through an interface customization strategy combined with UV-induced plasma welding. To enhance interfacial crosslinking, N , N -bis(acryloyl)cysteamine (BACA) was introduced as a surface adsorbate for AgNWs. The composite electrode exhibited rapid plasma welding of AgNWs under low-intensity UV irradiation. The optimized PDA-TCNF/AgNW-S/3 electrode demonstrated a sheet resistance of 7.26 Ω sq. −1 with a remarkable light transmittance of 85.7 %. The interface customization strategy facilitated enhanced diffusion of silver atoms at AgNW junctions during UV-induced heating, thereby strengthening their welding capability. These electrodes serve as high-performance FTCEs for electroluminescent devices and transparent electric heaters. Our work proposes a simple method to fabricate superior FTCEs by integrating nanocellulose with AgNWs, offering a promising environmentally friendly material for flexible optoelectronic applications.
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Nanoscale
·
2024
·Vol. 16
·期 24
·11651-11662
·
IF 5.8
Zi-Hao Yang,Jing Zhao,Ya-Juan Cai,Xu Yang,Chuan-Zhe Zhao,Yang Liu,Yi-Bo Li,Ke-Xiao Sang,Yi-Xing Sun,Ya-Ge Wu,Nan-Jun Wei,Jing-Gang Gai
A certain type of photoresist used for deep-UV lithography (DUVL) can also be used for other types of photolithography. Thus, to meet the requirements of two or more lithography technologies simultaneously, it is necessary to design a variety of corresponding functional groups in the molecules of materials and obtain the required properties. Herein, we designed four matrix resins based on acrylate for DUVL, employing alkyl sulfide, adamantane, methyladamantane, and hydroxyl as dangling groups and a microcrosslinking network by adding a small amount of crosslinker. These polymers were used in the thermal nanoimprint lithography (NIL) process, and distinct patterns with a resolution of 100 nm were observed. The acrylate copolymers designed for DUVL in this work can be used as thermal NIL resists and to obtain good patterns. It was found that ethylene dimethacrylate (EDMA) and adamantane endowed the matrix resins with good thermal stability and that PMMHM demonstrated the best patterning performance among the four resins. These polymers can be applied in the manufacturing of high-density integrated circuits, nano-transistors, optoelectronic devices and other components in the future.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
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IF 8.5
Mengmeng Zhang,Zhihui Sui,Lijian Sun,Qi Zhang,Wenjing Zhao,Longyu He,Shuzhen Gao,Fang Hu
In this study, a assembly technique based on phosphorylated sodium alginate (PSA) and fluorosilicone waterborne polyurethane (FSiWPU) was developed, and a multifunctional hemp cellulose fabric system which integrates flame retardant, hydrophobic and UV resistant properties was successfully constructed. Stable multilayer structures are formed by utilizing the hydrogen bonding between the phosphate group/carboxylic acid group of PSA and the carbamate group (-NHCOO-) of FSiWPU. The phosphorylation of sodium alginate significantly improves its thermal stability and generates a dense carbon layer with polyurethane decomposition products at high temperatures, resulting in a limiting oxygen index (LOI) of 32.7 % for hemp cellulose fabric, which achieves a UL-94 V-0 rating. Compared with the original fabric, the peak and total heat release rates of phosphorylated sodium alginate/fluorosilicone waterborne polyurethane (PSA/FSiWPU) coated hemp cellulose fabric decreased by 75.2 % and 90.1 %, respectively. Meanwhile, the fluorosilicon component in FSiWPU is enriched on the fabric surface and the water contact angle of the coated fabric reaches 136.05°, which endows the fabric with excellent hydrophobicity and self-cleaning properties. Encouragingly, the functional coating is universal and suitable for a variety of substrates. Moreover, the coated fabric shows excellent UV resistance, with a UV protection factor of 91.26 and a UVA transmission rate of <5 %. Not only that, coated fabrics also have good mechanical properties and washability. Therefore, this work not only opens up new idea for the multifunctional finishing of hemp cellulose fabrics, but also has great potential in practical applications.
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高影响因子
SENSORS
·
2025
·Vol. 25
·期 14
·4480
·
IF 3.5
Yinzhong Liu,Xiaoshun Wei,Yun Guo,Lingchao Wang,Hui Guo,Qingjie Wang,Yiyu Qiao,Xiaotao Zhu,Xuechun Yang,Lingli Cheng,Zheng Jiao
Volatile organic compounds (VOCs) are presently posing a rather considerable threat to both human health and environmental sustainability. Among these, n-butanol is commonly identified as bringing potential hazards to environmental integrity and individual health. This study presents the creation of a highly sensitive n-butanol gas sensor utilizing cobalt-doped zinc oxide (ZnO) derived from a metal–organic framework (MOF). A series of x-Co/MOF-ZnO (x = 1, 3, 5, 7 wt%) nanomaterials with varying Co ratios were generated using the homogeneous co-precipitation method and assessed for their gas-sensing performances under a low operating temperature (191 °C) and UV excitation (220 mW/cm2). These findings demonstrated that the 5-Co/MOF-ZnO sensor presented the highest oxygen vacancy (Ov) concentration and the largest specific surface area (SSA), representing the optimal reactivity, selectivity, and durability for n-butanol detection. Regarding the sensor’s response to 100 ppm n-butanol under UV excitation, it achieved a value of 1259.06, 9.80 times greater than that of pure MOF-ZnO (128.56) and 2.07 times higher than that in darkness (608.38). Additionally, under UV illumination, the sensor achieved a rapid response time (11 s) and recovery rate (23 s). As a strategy to transform the functionality of ZnO-based sensors for n-butanol gas detection, this study also investigated potential possible redox reactions occurring during the detection process.
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TALANTA
·
2025
·
IF 6.1
Manyan Qiu,Aiai Nie,Jinghang Zhang,Miao Zheng,Ning Guan,Sharuna De,Xiaoyan Pei,Xinyan Yang,Yujun Jiang,Qianyu Zhao,Chaoxin Man
The effective separation of fat-soluble vitamins from complex matrices prior to instrumental analysis remains a significant challenge. Herein, a novel magnetic covalent organic framework (Fe 3 O 4 @tetrakis(4-aminophenyl)methane (TAM)-2,6-dihydroxynaphthalene-1,5-dicarbaldehyde (DHNDA), Fe 3 O 4 @TAM-DHNDA) was successfully designed and prepared for the efficient separation and enrichment of three fat-soluble vitamins in dairy products. The maximal adsorption efficiency of Fe 3 O 4 @TAM-DHNDA to fat-soluble vitamin was as high as 26.94 mg/g. Moreover, the adsorption mechanism of Fe 3 O 4 @TAM-DHNDA for V A , V D , and V E was revealed by molecular simulation techniques. Van der Waals forces and hydrogen bonds were the main interactions between Fe 3 O 4 @TAM-DHNDA and fat-soluble vitamins. Importantly, the magnetic solid phase extraction (MSPE) method based on Fe 3 O 4 @TAM-DHNDA could be used as an effective sample pretreatment technology for separation and enrichment of fat-soluble vitamins from complex matrices prior to instrumental analysis. When coupled with high-performance liquid chromatography-ultraviolet detector (HPLC-UV), the proposed method enables the efficient detection of fat-soluble vitamins in dairy products. The limit of detection (S/N = 3) and limit of quantification (S/N = 10) were achieved at 20–50 ng/mL and 55–150 ng/mL, respectively. Good linearity (R 2 > 0.9998) was obtained within the range of 2–100 μg/mL. The average recoveries of spiked milk samples were determined to be 83%–101% and the relative standard deviation (RSD) was 0.83% to 3.46% ( n =3). This work provides novel insights into the development of novel magnetic adsorbents and the separation and enrichment of fat-soluble vitamins in complex matrices.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Wei-hang Chen,Dou Hu,De-xiang Sun,Lin Guo,Jing-hui Yang,Yong Wang
To address the applications of polylactic acid (PLA) in various environmental conditions, this study designed a novel additive, i.e. in-situ growing polyphosphazene nano-network on ammonium polyphosphate (APP) surface to construct the core-shell like structure through the bridging effect of chitosan. Such additive as a novel flame retardant exhibited superior flame retardant efficiency compared to the original APP, and the composite with only 15 wt% additive showed the limited oxygen index (LOI) of 31 % and V -0 flammability rating in UL-94 testing. The unique polyphosphazene nano-network structure on the surface of filler enhanced the interfacial interaction of composites and promoted the dispersion of filler in the PLA matrix, which improved the strength and modulus of composites to a certain extent, making up for the deterioration of mechanical properties induced by APP. Furthermore, the additive also endowed the composite with excellent ultraviolet (UV) shielding capability, and mechanical properties of the composite could be maintained at high level after long time UV irradiation. This work not only offers novel perspectives on the development of advanced multifunctional flame retardants, but also enhances the applicability of PLA across diverse industries.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Sihan Huang,Shaobo Lou,Xinyi Guo,Hao Zhu,Fangli Sun,Shujun Li,Zhou Shen,Tonghua Lu,Zhijun Chen,Hui Wang,Shuaibo Han
Wood is highly vulnerable to moisture, microbial attack, ultraviolet radiation, and their synergistic effects in outdoor environments, which significantly undermine its weather resistance and limit its applications. This study presents a straightforward method for the in situ generation of anti-erosion copper sulfide (CuS) particles on the surface and within poplar wood, markedly enhancing its durability in outdoor settings. The modified wood demonstrated exceptional superhydrophobicity and self-cleaning capabilities, with a water contact angle of 154.3 ± 2.1° and a 50 % reduction in water absorption compared to untreated poplar wood. Moreover, the superhydrophobic properties exhibited remarkable stability, remaining unchanged following mechanical abrasion, chemical (acidic and alkaline) exposure, ultrasonic treatment, 120 h of UV irradiation, and up to 30 days of microbial erosion. Additionally, the modified wood showed strong resistance to UV radiation and common wood-decaying fungi, with significantly improved anti-mold performance compared to other copper-based antimicrobial agents. This enhanced durability is primarily attributed to the firmly anchored CuS particles formed in situ on the wood substrate.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Mian Li,Lian-Yu Qiu,Tian-Yang Zhang,Bin Xu,Dan Yang,Ting Ye,Heng Luo
Advanced oxidation processes (AOPs) based on Fe 2+ /persulfate (PS) have been widely applied in water treatment but face critical challenges: inefficient radical utilization due to excess Fe 2+ scavenging, unsustainable reactivity from irreversible Fe 2+ -to-Fe 3+ conversion, and ambiguous dominant reactive species (e.g., SO 4 − / OH vs. high-valent iron). Ferric oxalate complexes address these limitations by enabling light-driven iron photoreduction and the Fe 2+ /Fe 3+ cycle. However, direct comparisons of degradation efficiency, mechanisms, and environmental risks between Fe 2+ /PS and UV/Fe(C 2 O 4 ) 3 3− /PS remain scarce. Using iohexol as a model, this study directly compared the two systems. The UV/Fe(C 2 O 4 ) 3 3− /PS system achieved 98.8 % iohexol degradation in 60 min (vs. 69.9 % for Fe 2+ /PS) and reduced iron sludge by 70–80 %. Both systems relied on SO 4 − and OH, but UV/Fe(C 2 O 4 ) 3 3− /PS enhanced radical yield via photocatalytic iron cycling, whereas Fe 2+ /PS depended on Fe(IV). In Fe 2+ /PS, contributions were Fe(IV) (29.4 %) > SO 4 − (25.9 %) > OH (20.2 %); in UV/Fe(C 2 O 4 ) 3 3− /PS, SO 4 − (63.6 %) > OH (23.7 %) > Fe(IV) (23.7 %). Electrical energy per order (EE/O) analysis showed UV/Fe(C 2 O 4 ) 3 3− /PS consumed 1.166 kWh mM −1 , 60.2 % lower than Fe 2+ /PS (2.524 kWh mM −1 ). Acute toxicity tests with Vibrio fischeri exhibited 67.7 % inhibition in Fe 2+ /PS, significantly higher than 36.4 % in UV/Fe(C 2 O 4 ) 3 3− /PS. Ecological Structure-Activity Relationships (ECOSAR) modeling and disinfection by-products (DBPs) risk assessment further confirmed lower risks in UV/Fe(C 2 O 4 ) 3 3− /PS, with 50 % lethal concentration ((LC 50 ) for aquatic organisms 2.3-fold higher and genotoxicity potency 41.7 % lower than Fe 2+ /PS. These results bridge the efficiency-risk gap between the two systems and offer a three-dimensional (efficiency-cost-safety) framework for AOP selection.
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REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Lu Li,Yongming Chen,Mengting Wei,Mingyuan Yang,Jiexiang Ren,Richeng Lian,Bifan Guo,Birong Zeng,Yiting Xu,Conghui Yuan,Lizong Dai
Epoxy resin is widely used in modern industry, however, its inherent flammability and susceptibility to aging limit its applications. Based on molecular structure design, a fluorinated bismaleimide was first synthesized as the key intermediate. Subsequently, through the highly reactive addition between the P H bond of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and the maleimide double bonds, a novel epoxy modifier (BMFP) was successfully synthesized, which simultaneously exhibited both excellent ultraviolet (UV) shielding performance and better flame retardancy. The resulting modifier demonstrated good compatibility with epoxy resin. Notably, as the addition amount increased, the epoxy composites not only maintained excellent optical transparency but also exhibited better UV-shielding efficiency and flame retardancy. When the BMFP addition amount reached 8 wt%, the epoxy composite achieved a UL-94 V-0 rating with a limiting oxygen index (LOI) of 31 %. In addition, the peak heat release rate (pHRR) and total heat release (THR) were reduced by 21.1 % and 20.3 %, respectively, compared to neat EP. Additionally, the UV-shielding efficiency showed a 93.4 % enhancement relative to the unmodified epoxy matrix. In addition, the presence of -CF 3 in the modifier effectively improved the dielectric and surface hydrophobicity properties of the epoxy composites, reducing dielectric loss by 31.3 % and increasing the water contact angle from 97.2° to 108.2°.
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危险品化学品经营许可证（带存储）