AICHE JOURNAL
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2024
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IF 3.5
Jingwei Zhang,Xiaohui Zhang,Jianhong Xu,Zhuo Chen
In this work, the liquid–liquid two-phase pressure drop and mass transfer characteristics in micro-packed beds with different shaped packing are investigated. The experimental results show that the liquid–liquid mass transfer performance of micro-packed bed is significantly affected by both apparent flow rates and phase ratio. By changing the characteristic size of the micro-packed bed, the experimental results show that the average volume mass transfer coefficient has no obvious correlation with the length of the bed, which indicates that the flow and dispersion behavior along the length of the micro-packed bed is basically stable. By considering dispersion strengthening, vortex strengthening and size effect, a semi-empirical model for predicting liquid–liquid mass transfer performance in a micro-packed bed is established for the first time. The model is in good agreement with the experimental results and has strong applicability to various shaped packings. In addition, by considering the contribution of inertia force, viscous force and interfacial tension to energy dissipation, a semi-empirical model of liquid–liquid two-phase pressure drop in a micro-packed bed is established. The pressure drop prediction model can also be applied to different shaped packings.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Chenxi Han,Youquan Li,Yibing Chen,Jin Zhang,Zijun Zhang,Yuqiu Ke,Jun Xiong,Linghui Yu,Ming Li
Interfacial solar desalination generation (ISDG) presents a promising solution for obtaining freshwater from seawater. However, developing solar evaporators with robust salt resistance using simple methods to ensure consistent desalination performance remains a major challenge. In this study, we engineered a solar evaporator (CuS-PDA-PVAF) by modifying polyvinyl alcohol foam (PVAF) with polydopamine (PDA) and CuS using a straightforward solution immersion method. The incorporation of PDA and CuS enhances the sunlight absorption capability of PVAF to approximately 98 %, resulting in an evaporation rate of 1.44 kg m –2 h –1 under 1-solar intensity. The CuS-PDA-PVAF solar evaporator leverages the macroporous structure and excellent hydrophilicity, enabling it to withstand 15 wt% saltwater while maintaining a steady evaporation rate of about 1.17 kg m –2 h –1 . Outdoor tests confirm that a 1 m 2 CuS-PDA-PVAF can generate approximately 5.6 kg of freshwater daily. This solar evaporator, designed simply and resistant to salt, possesses substantial potential for alleviating freshwater scarcity.
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Journal of Coatings Technology and Research
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2024
·
IF 2.3
Wang Peizhuang,Zhang Li,Hu Zhiqing,Shang Jiaqi,Zhou Jiang
Chitin nanofibers (ChNFs) with different numbers of carboxyls (i.e., with different degree of substitute, DS) were prepared by adjusting the amount of maleic anhydride used in the acylation treatment prior to mechanical nanofibrillation with ultrasound. Transparent coatings were fabricated by using the obtained ChNFs through casting method and modified via vapor deposition by using 1 H , 1 H , 2 H , 2 H -perfluorodecyltrichlorosilane (PFDTS). Hydro-oleophobicity and anti-fingerprint capacity of the ChNF coatings were studied. It was found that the ChNF coatings with more carboxyls possessed stronger hydro-oleophobicity as well as anti-fingerprint capacity after the modification of PFDTS deposition. Analysis of X-ray photoelectron spectroscopy suggested that more PFDTS molecules were grafted onto the ChNF coating surface when the ChNFs had more carboxyls (with higher DS). It is the number of carboxyls rather than hydroxyls on ChNF coating surface that determines hydro-oleophobicity and anti-fingerprint capacity of the ChNF coating surface after the modification of the PFDTS deposition. Graphical abstract
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FOOD HYDROCOLLOIDS
·
2024
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IF 11
Chengcheng Liu,Wenyue Li,Caixia Li,Xia Zhang,Guidan Wang,Yajun Shen,Yutang Wang,Xuebo Liu,Lijun Sun
The modification effects of Cyperus esculentus milk (CEM) on the sensory and gel properties of set yogurt were elucidated in this study. It was found that a suitable CEM addition adjusted the color, moderated the acidity, and enriched the aroma of compound yogurt. Interestingly, the internal network structures of yogurt gel were strengthened at a low CEM addition, causing the improvement of yogurt textural properties, viscoelasticity and water-holding-capacity. However, a high CEM addition induced the incompact gel structures, unbeneficial to the expected textures and rheology of compound yogurt. Then, starch (CES) and proteins (CEP) were isolated to elucidate their influence on the gelation behaviors of casein. The results showed that CES always promoted the formation of CES-casein gel, improving its textural, elastic and morphological characters. This resulted from the presence of branchy side chains of amylopectin and the viscosity of starch molecules, making CES tightly anchor with casein gel and thus fill in the gel pores. However, the CEP-casein gel properties described an enhanced-weakened trend with CEP addition increasing. Notably, at a low addition, CEP well-dispersed and interacted with casein, filling into gel pores and thus strengthening gel network, while at a high addition, the self-gelling CEP gradually separated from casein gel due to few branchy structures and insufficient viscosity. It was the characteristic behaviors of CEM components that affected the gelling properties of compound yogurt. Conclusively, a moderate addition of CEM (<20%) is recommended to enrich the flavor of set yogurt with simultaneously-improved or maintained textural and gelling properties.
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IMMUNOLOGICAL INVESTIGATIONS
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2012
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IF 1.164
Xiaoling Wu,Libing Wang,Wei Ma,Yingyue Zhu,Liguang Xu,Hua Kuang,Chuanlai Xu
A rapid, sensitive, specific and simple method based on Fluorescence Polarization Immunoassay (FPIA) was developed for the quantitative detection of Bisphenol A in water. 4, 4-Bis (4-hydroxyphenyl) valeric acid (BHPVA) was selected as the hapten to produce the immunogen. Fluorescein-labeled Bisphenol A derivatives (tracers) with different structures were synthesized and purified by thin layer chromatography. Based on the polyclonal antibody and tracers, an optimized FPIA method was developed with a detection limit (10% inhibition) of 2 μg L−1 and a linear working range of 20 to 800 μg L−1. FPIA was suitable for screening a large number of samples. The recoveries of fortified Tai lake water samples ranged from 91.85 to 102.78%, and tap water samples ranged from 90.36 to 96.01%. The coefficients of variation were all less than 20%. This FPIA method, which did not require a complicated cleanup process, proved to be very useful for the screening of Bisphenol A in environmental water samples.
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PubMed
高影响因子
npj Flexible Electronics
·
2024
·Vol. 8
·期 1
·1-11
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IF 12.3
Wang Zihu,Dong Yan,Sui Xiaoxiao,Shao Xingyan,Li Kangshuai,Zhang Hao,Xu Zhenyuan,Zhang Dongzhi
The precise, simultaneous, and rapid detection of essential biomarkers in human tears is imperative for monitoring both ocular and systemic health. The utilization of a wearable colorimetric biochemical sensor exhibits potential in achieving swift and concurrent detection of pivotal biomarkers in tears. Nevertheless, challenges arise in the collection, interpretation, and sharing of data from the colorimetric sensor, thereby restricting the practical implementation of this technology. To overcome these challenges, this research introduces an artificial intelligence-assisted wearable microfluidic colorimetric sensor system (AI-WMCS) for rapid, non-invasive, and simultaneous detection of key biomarkers in human tears, including vitamin C, H + (pH), Ca 2+ , and proteins. The sensor consists of a flexible microfluidic epidermal patch that collects tears and facilitates the colorimetric reaction, and a deep-learning neural network-based cloud server data analysis system (CSDAS) embedded in a smartphone enabling color data acquisition, interpretation, auto-correction, and display. To enhance accuracy, a well-trained multichannel convolutional recurrent neural network (CNN-GRU) corrects errors in the interpreted concentration data caused by varying pH and color temperature in different measurements. The test set determination coefficients (R 2 ) of 1D-CNN-GRU for predicting pH and 3D-CNN-GRU for predicting the other three biomarkers were as high as 0.998 and 0.994, respectively. This correction significantly improves the accuracy of the predicted concentration, enabling accurate, simultaneous, and quick detection of four critical tear biomarkers using only minute amounts of tears ( ~ 20 μL). This research demonstrates the powerful integration of a flexible microfluidic colorimetric biosensor and deep-learning algorithm, which holds immense potential to revolutionize the fields of health monitoring.
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JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Junbin Liao,Tongtong Wang,Yifan Xu,Qishun Zhang,Yuanyuan Tang,Junjie Mu,Edison Huixiang Ang,Yuyang Yao,Yanqing Xu,Jiangnan Shen
Mono-valent selective ion-exchange membrane, as the core component of selective electrodialysis (SED), has received extensive attention. In this work, we report a mono-valent selective anion-exchange membrane (AEM), which was fabricated with distorted poly(aryl ether sulfone) and decorated with bifunctional side-chains providing anion exchange groups and hydrophobic segments. By tuning the length of the hydrophobic side-chains, the nanophase separation within AEMs was finely tuned, evidenced by an ionic cluster size of about 0.47 nm from SAXS analysis. The optimized AEM (PAES-TA-7 AEM) shows a very low water swelling ratio of 6.4 %, signaling good dimensional stability. The perm-selectivity ( P S O 4 2 – C l – ) of PAES-TA-7 AEM during ED reached 107 at 2.5 mA∙cm −2 (ion flux: 2.69 × 10 −8 mol cm −2 s −1 at 90 min) significantly exceeding that of the commercial Neosepta ACS (11; 2.08 × 10 −8 mol cm −2 s −1 ). It is inferred that the ion channels, resulting from nanophase separation between the side-chains and the backbone, as well as the free volume cavity created by the distorted backbone, significantly contribute to the smooth transport of the Cl − ions through the AEM with less resistance. As a result, it is believed that this work offers a useful strategy to advance the monovalent anion-selective membranes.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2024
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IF 3.7
Min An,Chengxiang Wang,Qing Liu,Mengya Wang,Zhirong Yang,Wenpeng Li,Guoli Zhou,Jingtao Wang,Jinli Zhang
Combining the advantages of high efficiency, low-pressure drop, and large throughput, the pore array-enhanced tube-in-tube microchannel (PA-TMC) is a promising microreactor for industrial applications. However, most of the mass transfer takes place in the upstream pore region, while the contribution of the downstream annulus is limited. In this work, helical wires were introduced into the annulus by adhering to the outer surface of the inner tube. Mixing behavior and mass transfer of liquid–liquid two-phase flow in PA-TMC with different helical wires have been systematically studied by a combination of experiments and volume of fluid (VOF) method. The introduction of helical wires improves the overall volumetric mass transfer coefficient K L a by up to 133% and the mass transfer efficiency E by up to 117%. The simulation results show that the helical wire brings extra phase mixing regions and increases the specific interface area, while accelerating the fluid flow and expanding the area of enhanced turbulent dissipation rate. Influences of helical wires in various configurations are compared by the comprehensive index I concerning the pressure drop and mass transfer performance simultaneously and a new correlation between K L a and specific energy consumption ϕ is proposed. This research deepens the understanding of the mixing behavior and mass transfer in the PA-TMCs and provides practical experience for the process intensification of microchannel reactors.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Junbin Liao,Qishun Zhang,Yu Xu,Shiyu Zhou,Yifan Xu,Wenlong Ding,Zhiqiang Wu,Haoyu Liu,Yanqing Xu,Huimin Ruan,Jiangnan Shen
The ion separation performance of polymer membrane can be significantly enhanced by constructing suitable and stable ion channels within the dense matrix. In this work, we fabricated four anion exchange membranes (AEMs) based on a type of distorted poly(aryl ether sulfone) bearing dual-side-chains and explored the influence of these dual-side-chains by tuning the ratio of the two on the separation performance of Cl−/F− and Cl−/SO42−. Small-angle X-ray scattering analysis indicated that the as-prepared AEMs in wet state possessed sub-nanometer ion channels with a size of 0.334 nm, which resulted from the synergetic modification of the distorted main chains and dual-side-chains. In addition, the stability of the ion channels could be verified by a very low swelling ratio of 5.3%. The AEM with the smallest ion channel demonstrated superior perm-selectivity (Cl−/SO42−) of 52.21 during the electrodialysis (ED) process, compared to other AEMs, such as ACS AEM, which showed a selectivity of 18.63. In addition, the optimum AEM (PPH-sIm10−X-5NX) also exhibited selectivity for Cl−/F− due to its dense structure and hydrophobic side chains. By using free volume and electrostatics-driven simulations, it was inferred that the ion-blocking effect of the dense membrane structure on the transport of larger ions was effective. As a result, this dual-side-chain polymer with a distorted backbone is conducive to constructing stable sub-nanometer ion channels in AEMs for mono-/bi-valent anion resource recovery.
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POLYMER
·
2024
·
IF 4.1
Jingyao Feng,Danhui Wang,Nan Li,Heming Wang,Ning Wang,Bing Wang,Shan Cheng,Qingguang Bao,Jiangang Liu,Xiaonan Shi,Mengting Li,Xigao Jian
In this study, a series of high temperature resistant water-soluble thermoplastic sizing agents were designed and synthesized to improve the interfacial bonding of CF/PPESK composites. The effects of the ratio of water-soluble functional monomer (PPL) and high temperature resistant monomer (DHPZ) on the performance of the pastes were investigated. The results showed that the sizing agent with PPL: DHPZ = 6: 4 had the best performance, and its thermal decomposition temperature was up to 348 °C, which met the requirements of the composite molding process. The ILSS and flexural strength reached the peaks of 67.2 MPa and 1526.5 MPa. The retention rates were 89.7 % and 81.8 %, respectively, after hydrothermal aging treatment, compared with 77.7 % and 79.2 % for the epoxy sizing agent. The bottleneck of traditional epoxy sizing agent and CF/PPESK composites molding process mismatch has been broken.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Zhiqing Hu,Peizhuang Wang,Jiaqi Shang,Li Zhang,Jiang Zhou,Lili Ren
Chitin nanofibers are widely used in many fields because of their biocompatibility , renewability and excellent mechanical properties. Herein, zwitterionically charged chitin nanofibers (ZC-ChNFs) were prepared from chitin via one step chemical modification (oxalic acid pretreatment) and subsequent ultrasound treatment. Effects of pretreatment time on size of the ZC-ChNFs and pH of ZC-ChNF suspensions on the thickness, porosity, refractive index and antireflective capacity of ZC-ChNF coatings were investigated. It was found that, by adjusting pH of the ZC-ChNF suspension, porosity and refractive index of the ZC-ChNF coatings could be controlled. The ZC-ChNF coatings fabricated with smaller ZC-ChNFs had higher antireflective performance and the transmittance gain of a glass with a ZC-ChNF coating was about 3.5 % at a wavelength of 550 nm compared to the bare glass. The results of this work provide a promising pathway to fabricate antireflective coating with ZC-ChNFs just by controlling the pH of ZC-ChNF suspensions.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Na Yang,Yamei Jin,Yuyi Zhou,Xiaoqun Zhou
A novel electromagnetic heat extraction method was presented, whereby mandarin peels residue solution was located in a winding coil subjected to an oscillating magnetic field, and the pectin was extracted under appropriate conditions. Numerical relationships between applied magnetic field and induced electric field (IEF) in the extraction process were elaborated. The results showed that the induced current density, IEF and terminal temperature increased with increasing magnetic field. The maximum current density of 0.35 A/cm corresponds to the highest terminal temperature of 84.6 °C and IEF intensity of 26.6 V/cm. When magnetic field intensity was 1.39 T and the extraction time was 15 min, the maximum yield of pectin reached 9.16 %. In addition, all treatments impacted the ash content, protein content, water-holding capacity (WHC), and oil-holding capacity (OHC) of the obtained pectin. The pectin extracted by electromagnetic heat had the lowest DE value of 71.3 % with 126.55 kDa molecular weight, while the GalA content was at the highest level of 76.18 %. After different treatments, the composition of pectin monosaccharides changed, but there were slight differences in the composition of pectin polysaccharides. Moreover, the electromagnetic heat extracted pectin had light color and an obvious surface fragmentation of the peel residue.
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危险品化学品经营许可证（带存储）