Polymer Chemistry
·
2016
·Vol. 8
·期 7
·1163-1176
·
IF 5.687
Xue Jiang,Feng Chun,Guolin Lu,Huang Xiaoyu
The monomer, 2,2,2-trifluoroethyl 3-(N-(2-(diethylamino)ethyl)acrylamido)propanoate (TF-DEAE-AM), which contains both O2 and CO2-responsive functionalities, was first synthesized from commercially available N,N-diethylethylenediamine, 2,2,2-trifluoroethyl acrylate, and acryloyl chloride. Subsequently, a series of dual-gas responsive polymers, poly(2,2,2-trifluoroethyl 3-(N-(2-(diethylamino)ethyl)acrylamido)propanoate) (poly(TF-DEAE-AM)) and poly(ethylene glycol)-b-poly(2,2,2-trifluoroethyl 3-(N-(2-(diethylamino)ethyl)acrylamido)propanoate) (PEG-b-poly(TF-DEAE-AM)), were synthesized by employing reversible addition–fragmentation chain transfer (RAFT) polymerization. Due to the protonation between CO2 and DEAE groups, and the specific van der Waals interactions between O2 and C–F bonds, micelles consisting of poly(TF-DEAE-AM) or PEG-b-poly(TF-DEAE-AM) display distinct CO2 and O2 responsiveness in aqueous media. Pyrene, which is a model hydrophobic drug, is able to be effectively encapsulated in the micelles based on PEG-b-poly(TF-DEAE-AM). It is found that the release of pyrene sharply increases after bubbling CO2 or O2 compared to N2, and the release rate of the solution bubbling with CO2 is the fastest. Since both CO2 and O2 are key gases for the human body, the CO2- and O2-induced release property of poly(TF-DEAE-AM) may open opportunities for the preparation of functional materials with special CO2 and O2 responsiveness for potential applications in biomedicine.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2019
·
IF 3.372
Jingyi Cao,Jun Pan,Zhaoliang Cui,Zhaohui Wang,Xiaozu Wang,Enrico Drioli
Membrane condenser (MC) is a novel and promising operation to recover evaporated water from highly humid gas discharged from industrial production. By means of hydrophobic membrane surface, water vapor condensed on membrane retention side, finally be collected. The aim of this paper is to enhance the recovery efficiency of poly(vinylidene fluoride) (PVDF) membrane in MC process. Significantly, coating three kinds of Hyflon ADs onto PVDF membranes effectively improved hydrophobicity of original ones. Among them, Hyflon AD40L/PVDF membrane showed the best membrane and MC performance, the LEP w and water contact angle of which reached 0.43 MPa and 126°, respectively. In terms of dehydration performance in MC, by coated with Hyflon AD40L, water recovery was increased from 7.92% to 18.85%, and condensate water flow (0.35 kg·m −2 ·h −1 ) was twice that of pristine ones (0.15 kg·m −2 ·h −1 ). These results indicate that Hyflon AD composite membrane is a promising candidate for MC process with high efficiency.
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高影响因子
CHEMISTRY OF MATERIALS
·
2023
·
IF 8.6
Zhilong Song,Jia Yan
The analysis of exhaled human breath has great significance for early noninvasive diagnosis. However, highly sensitive and selective detection against part-per-billion (ppb) biomarkers in exhaled human breath (RH ≥80%) at room temperature remains a challenge. SnO2 quantum wires (QWs) consisting of a few hundreds to thousands of atoms are demonstrated to be promising for low-power consumption gas sensors to achieve an on-chip electronic nose. Here, we propose a low-temperature doping strategy in realizing the synthesis of the transition metal (Mn, Cr, V)-doped SnO2 QWs. The doped SnO2 QWs with sub-4 nm diameters as chemiresistive gas sensors enable us to improve the adsorption activities, achieving enhanced room-temperature sensing properties toward the trace biomarkers (e.g., acetone, formaldehyde, and H2S) with the state-of-the-art limit of detection of 2.6, 1.5, and 1.3 ppb, respectively. These transition metal-doped SnO2 QWs are then integrated as a sensor array, enabling gas identification at different relative humidities by using machine learning algorithms. Moreover, systematical characterizations combined with density functional theory (DFT) calculations are conducted to figure out the effect of doping on SnO2 QW properties for the sensitive and selective ppb-level gas detection. The engineering of transition metal-doped SnO2 QWs helps us to extend the library for the design of low-power consumption gas sensors in more broad applications.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·Vol. 142
·期 20
·e56887
·
IF 2.8
Lei Zhang,Yilin Wang,Weixia Zhou,Dan He,Yiming Xiao,Haoran Chen,Na Tang
Conventional gas separation membranes are mostly aimed at improving the permeability and selectivity of membranes. However, the actual application environment is complex and changeable, and the failure of the material is a common problem in the use process. Fluorinated polyurethane acrylate was synthesized via the fluorinated unit alcohol end-capping approach to enhance the antioxidant capacity of gas separation membranes. The fluorine element is used as an important part of the membrane structure, and then the antioxidant capacity of the membrane is enhanced. Specifically, hexamethylene diisocyanate isocyanurate (HDI) trimer and 1H, 1H, 2H, 2H-Tridecafluorooctanol (TFOA) were precisely metered and underwent an addition reaction. Subsequently, two molecules of the resulting addition products were connected to a molecule of 1,6-hexanediol (HDO). This was followed by a nucleophilic addition reaction between hydroxyethyl methacrylate and the fluorine-rich molecular formula, yielding fluorinated polyurethane acrylate (FPUA). To fabricate the gas separation membrane, photoinitiators were incorporated into the FPUA, followed by curing under UV irradiation. Under optimized conditions, the membrane exhibited exceptional performance in CO 2 /SF 6 separation, achieving a gas selectivity of 126.11. The presence of abundant carbon, fluorine, and oxygen atoms in the separation layer significantly bolstered its antioxidant properties. After immersion in a 1 g/L NaClO solution for 7 days, the membrane exhibited minimal corrosion loss of only 1.5% ± 1.3%, and the water contact angle decreased by just 1.8°. This robust membrane material offers promise for the separation of mixed gases containing oxidizing components.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Lichong Yang,Jingwen Dong,Hongyu Li,Jiayi Li,Long Li,Di Wu,Pingwei Liu,Xuequn Shi,Xiaojing Chen,Kunsong Chen
Target gas selection was based on the GC–MS test of mango fruit during storage. • A 4-sensor array consisted of Pd-SnO 2 exhibited good performance for target gases. • The TabPFN model was used for mixed gas detection based on the sensor array. • The sensing mechanism was explained by characterization and DFT calculations. • Mango maturity identification was achieved by the sensor-algorithm integrated system. Plants maintain continuous gaseous exchange with their surroundings, and the volatile organic compounds (VOCs) they emit can act as indicators of plant physiological status. As an important plant organ, fruit maintains active physiological metabolism, including during the postharvest stage. Therefore, the detection of volatile compounds in postharvest fruits can be used to evaluate the quality and monitor their spoilage during storage and transportation. However, current gas detection instruments are mostly benchtop devices that are bulky and costly, making them unsuitable for practical industrial applications. Thus, developing gas-based rapid maturation assessment technologies for fruits is growing increasingly essential. In this study, we developed an intelligent monitoring system for fruit ripening process monitoring, with mangoes chosen as the research subject. Specifically, ethylene, ethanol, ethyl acetate and dipentene were identified as four target gases based on the detection results of VOCs released by mangoes during storage via solid-phase microextraction combined with gas chromatography–mass spectrometry. To detect these signals, a 4-sensor array was constructed using SnO 2 nanospheres functionalized with palladium nanoparticles, leveraging resistance variations to capture the dynamics of gases. Density functional theory calculations and comprehensive characterization were employed to elucidate the sensing mechanism. The Tabular Prior-data Fitted Network, a Transformer-based deep learning model, was used to analyze four target gases and their multicomponent mixtures. This method achieved high-precision classification (94.8%) for the gases and their mixtures, as well as accurate concentration regression (R 2 = 0.839) for the target components. Finally, the system was integrated into a portable platform, enabling the on-site identification of mango maturity across different storage durations. This work establishes a robust framework for sensor design and intelligent fruit quality monitoring. Download: Download high-res image (194KB) Download: Download full-size image
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高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2026
·
IF 5.1
Peicheng Han,Yunbo Shi,Canda Zheng,Bolun Tang,Qiaohua Feng
Green hydrothermal synthesis of flower-like WSe 2 using biodegradable ascorbic acid as the reducing agent. • Vacuum sintering at 450 ∘ C improved the crystallinity, surface activity, and charge transport of WSe 2 enhancing NO 2 sensing. • Optimal 3% Pd decoration enabled catalytic/interfacial sensitization, achieving a response of 2.26 toward 16 ppm NO 2 with good selectivity and stability. Although WSe 2 has shown great potential for NO 2 sensing, its development remains challenging because conventional hydrothermal synthesis often relies on hazardous reducing agents such as NaBH 4 and N 2 H 4 ⋅ H 2 O, which may cause rapid H 2 release, toxicity, and environmentally harmful byproducts. In addition, the sensing performance of WSe 2 is often limited by insufficient active sites and inefficient charge transfer. Herein, flower-like WSe 2 nanostructures were synthesized via a one-step hydrothermal route using benign, biodegradable, eco-friendly, and cost-effective C 6 H 8 O 6 as the reducing agent. The obtained WSe 2 was vacuum-sintered at the optimized temperature of 450 ∘ C and further decorated with Pd nanoparticles to enhance NO 2 sensing performance. The optimized 3% Pd-WSe 2 -450 ∘ C sensor exhibited a response ( R a / R g ) of 2.26 toward 16 ppm NO 2 at an operating temperature of 114 ∘ C, with response and recovery times of 20 and 190 s, respectively. The enhanced sensing performance is attributed to the synergistic effects of Pd decoration, improved crystallinity, abundant surface oxygen species, and efficient interfacial charge modulation. This work demonstrates a Pd-modified WSe 2 -based NO 2 gas sensor, where green synthesis, vacuum sintering, and interfacial Pd engineering synergistically enhance the sensing performance. Download: Download high-res image (368KB) Download: Download full-size image
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Runduo Teng,Changhao Feng,Yanting Wang,Wenjun Tu,Tianyu Lan,Qiyuan Fu,Jingyu Long
N-butanol is widely used in fields such as chemical engineering and pharmaceutical synthesis; therefore, trace-level, highly sensitive detection of n-butanol is of great significance. In this study, an n-butanol gas sensor based on silver (Ag)-decorated yttrium ferrite (YFeO 3 ) nanotubes was fabricated using the electrospinning followed by the impregnation method. Compared with the pure YFeO 3 , the Ag-decorated YFeO 3 nanotubes exhibited an enhanced response of 162.06 toward 10 ppm n-butanol. This remarkable gas-sensing performance is primarily attributed to the synergistic effects of the mixed-valence states of iron, abundant surface oxygen vacancies, and the Ag spillover effect. Moreover, it exhibits excellent long-term stability and a detection limit as low as 76.5 ppb. These results indicate that Ag-decorated YFeO 3 nanotubes hold significant potential for trace n-butanol detection.
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高影响因子
POLYMER
·
2026
·
IF 5.1
Weiyuan Liang,Xinyu Wang,Meiyi Bao,Ruyun Yan,Yikai Wang,Lin Yang,Wenju Jiang,Junfeng Zheng,Lu Yao,Zhongde Dai
Achieving both high permeability and high selectivity in carbon dioxide (CO 2 ) separation membranes is essential for effective carbon capture. To address this challenge, a multiscale structural modulation strategy combining monomer engineering, post-grafting side-chain modification, and non-solvent-induced microstructure rearrangement (MSR) was developed. Different rigid and ether-rich structural units were incorporated into the copolymer backbone to simultaneously regulate chain packing and CO 2 affinity, while epoxy-containing side chains were further grafted to optimize gas transport pathways. Among the prepared membranes, the PEG-grafted membrane shows a marked increase in CO 2 permeability from 537.9 to 1640.9 Barrer without sacrificing CO 2 /N 2 selectivity. When further treated with ethanol-induced MSR, partial swelling-induced chain relaxation and rearrangement slightly increase the interchain spacing and generate more continuous gas transport pathways. Consequently, the optimized membrane shows a CO 2 permeability of 1865.4 Barrer and a CO 2 /N 2 selectivity of 39.75, approaching the 2019 Robeson upper bound. Long-term stability tests confirm the durability of the optimized membrane. Overall, this work demonstrates that the synergistic combination of monomer engineering, post-grafting, and MSR treatment provides an effective strategy for simultaneously enhancing CO 2 permeability and CO 2 /N 2 selectivity.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Ya-Qiao Tian,Ming-Chuan Zhou,Xiao Sheng,Xiao-Feng Zheng,Wei Xu,Le Sang,Zhi-Ping Zhao
In this work, three types of tubular membrane were prepared and characterized: hydrophilic, Janus, and hydrophobic. In the MDEA/water-N 2 system, the hydrophilic membrane tube generates the smallest bubble size (161–256 μm) with narrow distribution and hydrophobic membrane tube produces the largest bubble size (3378–4357 μm) with a broader distribution, while the Janus membrane tube yields bubbles with an average size ranging from 668 to 927 μm. For the ethanol-N 2 system, the differences in bubble size among the different membrane tubes are less pronounced. The hydrophilic, hydrophobic, and Janus membrane tube produces bubbles size of 300–477 μm, 376–633 μm, and 413–697 μm, respectively. The bubble size distribution for three types of membrane tube follows a Rosin-Rammler (R-R) distribution. A gas holdup of 4–35.3% and gas–liquid interfacial area of 91–8859 m 2 /m 3 can be obtained for three types of membrane tubes. Based on 0.2 mol/L MDEA-CO 2 mass transfer system, Janus membrane shows the superior mass transfer coefficient performance due to the appropriate bubble size and narrow bubble size distribution. Predictive models for average bubble size, gas holdup, and gas–liquid mass transfer coefficient of three types of membrane tube were developed, showing good agreement with measured values.
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高影响因子
MACROMOLECULAR BIOSCIENCE
·
2026
·Vol. 26
·期 8
·e70238
·
IF 4.2
Meng Wang,Hongzhen Jia,Chengfu Zhang,Ningli Wang,Puzhao Liu,Dong Pei,Qingli Qu
Enzyme immobilization is an effective strategy to improve catalyst recovery and operational stability, but conventional approaches are often limited by diffusion resistance, steric hindrance, and insufficient control over the enzyme microenvironment. Hydrogel-based materials are attractive supports because their hydrated, tunable, and porous networks help preserve enzyme conformation while improving substrate diffusion and mass transfer. Here, a gas-shearing microfluidic strategy was developed to fabricate alginate/chitosan hydrogel microreactors for dual-mode lipase immobilization through entrapment and genipin-mediated covalent binding. By tuning gas-liquid shear, microspheres with controllable and narrow size distribution were generated without surfactants or UV-initiated polymerization. Importantly, genipin was introduced as a mild and biocompatible cross-linker to reinforce the alginate/chitosan network and create a stable interfacial microenvironment for enzyme immobilization. Compared with conventional cross-linkers, the milder and more controllable reactivity of genipin is advantageous in preserving enzyme conformation and catalytic performance. The resulting microreactors exhibited enhanced catalytic activity, improved storage stability, and good reusability. After five consecutive cycles, the entrapped and covalently immobilized systems retained 70% and 81% of their initial activity, respectively. These results demonstrate that gas-shearing microfluidics combined with genipin-mediated network reinforcement provides a robust and biocompatible platform for constructing hydrogel-based enzymatic microreactors with improved catalytic performance and operational durability.
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高影响因子
Advanced Science
·
2026
·
IF 14.1
Yi Liang,Zhong Li,Tao Tang,Yinfen Cheng,Xinyi Hu,Jinghao Zhuang,Ang Li,Yaoyang Liu,Qingguo Feng,Mingyuan Wang,Guiwu Liu,Guanyu Chen,Fanli Meng,Jian Zhen Ou
Strong electron-phonon interactions in layered Ruddlesden-Popper (RP) phase oxides, such as La 2 CoO 4 , present a major challenge for accessing their 2D counterparts. Here, we present a rapid and efficient exfoliation strategy that leverages the resonance between ultrasonic phonon waves and the intrinsic vibrational frequency of La-O bonds within the rock-salt interlayer, which are responsible for the strong electron-phonon coupling. By applying a continuous phonon wave at this resonant frequency, bulk La 2 CoO 4 is exfoliated into 2D nanosheets within minutes. This process is significantly faster than conventional ion-insertion-based chemical exfoliation methods, which typically require several days. The resulting 2D-La 2 CoO 4 possesses abundant surface dangling bonds and pronounced surface charge redistribution, enabling highly sensitive NO 2 detection at room temperature under visible light excitation. The sensor demonstrates an ultra-low detection limit of 5 ppb and a high response magnitude of 86.67% toward 1 ppm NO 2 , along with excellent selectivity, humidity resistance, and long-term stability for up to 60 days. This work not only introduces a phonon-resonance-driven exfoliation strategy for layered oxides but also showcases the potential of 2D RP phase materials with undercoordinated surface sites for high-performance room-temperature gas sensing.
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PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.3
Weiwei Huang,Maotao Cui,Likun Song,Wenqing Wu,Xiu Dong,Xia Gao,Zuowan Zhou
Lignocellulosic biomass films are promising green alternatives to petroleum-derived packaging. However, their high hydrophilicity and poor barrier properties remain critical challenges for commercialization. To address these critical challenges, herein, we propose a skin-mimetic surface engineering strategy to synergistically enhance the hydrophobicity and gas barrier properties of regenerated whole-component bamboo biomass films while feasibly regulating their biodegradability. Specifically, we constructed the skin-mimetic surface via an in situ ring-opening polymerization of epoxidized soybean oil (ESO), which was adsorbed onto the regenerated biomass film through soaking in an ESO solution. This skin-mimetic architecture endows the films with exceptional hydrophobicity, as reflected by a water contact angle of 115° and an 89% reduction in water absorption compared with that of the control sample. Furthermore, the skin-mimetic bamboo films exhibited enhanced barrier properties, showing 37–97% reductions in both oxygen transmission rate (OTR) and water vapor transmission rate (WVTR). The optimal barrier performance was observed at an epidermal thickness of 15 μm, with a WVTR of 63.4 g/m2·24 h and an OTR of 0.32 cm3/(m2·24 h·0.1 MPa). Besides, the epidermal layers allowed the modulation of the biodegradation rate under soil burial, with the film stability ranging from 10 to 150 days depending on the epidermal thickness. This work provides an efficient method to develop a high-performance, biodegradable bamboo-based packaging material.
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高影响因子
危险品化学品经营许可证（带存储）