CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Wanshun Deng,Gang Wang,Zhixiang Zeng,Tianhui Ren
To achieve smart control of liquid penetration, liquid diodes have been widely studied in the recent years. However, most liquid diodes can only achieve opposite wettability in one or two systems, resulting in the loss of unidirectional liquid transportation property after they are wetted by immiscible liquids. This shortcoming will highly restrain the application areas of liquid diodes. Herein, a two-step single-side etching strategy have been adopted to develop opposite wettability on reverse sides of single-layered meshes. Opposite wettability forms not only in air but also under various liquids such as water and oil to realize unidirectional liquid penetration in these systems. More importantly, varied thickness of lyophobic layer was found to be crucial in liquid transportation in different systems, which was further demonstrated by the analysis of Laplace pressure on various meshes. Besides, the obtained liquid diodes were also competent in fog collection, liquid capture and oil/water separation, exhibiting great versatility. Thus, our findings not only propose on-demand and versatile liquid diodes but can also enlighten further study in smart valves in different systems.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Guanjie Zeng,Xiaozhong Huang,Jianling Yue,Benhui Fan,Yu Liu,Xiu-Zhi Tang
Efficient cleanup of oil spills is still a global challenge due to the high viscosity of crude oil and complicated topographic features. Herein, magnetic porous carbon powders (MPCs) with photothermal effect prepared at a Fe(NO 3 ) 3 : bamboo mass ratio was 1/1 carbonized at 700 °C. After modifying with the n-octadecylamine, the oleophilic MPCs exhibited rapid and selective absorption of different oils from polluted water, with an optimal absorption capacity of 3.2–8.1 g/g. Since oil's viscosity is highly temperature-sensitive, MPCs with photothermal characteristics offer apparent advantages in absorbing high viscosity oil. Moreover, due to the incorporation of magnetic components, powder-like MPCs can be conveyed to a specified oil pollution spot (including gaps or cracks) conveniently and collected through a remote magnetic field. This work demonstrates a simple and low-cost way of designing and producing oil/water separation materials, particularly floating high-viscosity oil recovery.
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LANGMUIR
·
2022
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IF 4.331
Yang Yang,Li Wang,Xiaojiang Li,Dan Liu,Shanshan Dai,Hongsheng Lu
Phase-selective organogelators (PSOGs) have recently attracted more attention because of their advantages in handling oil spills and leaked organic solvents. However, it is difficult to separate and recover the organic phase and PSOGs from organic gels due to the strong interaction between them. Aiming to enhance the separation and recovery performance of the organic phase and PSOGs, we synthesized a series of pH-responsive PSOGs by using itaconic anhydride and fatty amines with carbon chain lengths of C12–C18. Here, PSOGs have an excellent gelation ability in that amounts of organic solvents and fuel oil can be solidified at a low concentration (<3 wt %). It is worth noting that these gels are stronger, which is more convenient for removal by a salvage operation. More importantly, compared with traditional organogelators, pH-responsive PSOGs can easily recover the organic phase and fuel oil with an adjustment of the pH without extraction or distillation. Because of the transformation between the hydrophilicity and hydrophobicity of PSOGs by pH stimulation, 83.15% PSOGs are recovered in three-cycle experiments. In addition, the recycled PSOGs can be used to realize the removal of the organic phase again. Herein, we find that pH-responsive PSOGs could be used as promising and sustainable materials for separating and recovering organic solvents/oils and PSOGs.
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LANGMUIR
·
2022
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IF 4.331
Hui Wang,Qi Zhao,Kuikui Zhang,Futao Wang,Jinfang Zhi,Chong-Xin Shan
Fabrication of absorbent materials foroil/water separation is an important ecological pursuit for oil spill clean-up and organic pollutants’ removal. In this study, nanodiamonds (NDs), a promising member of the carbon family, were functionally modified by the covalent linking of octadecylamine (ODA). Subsequently, the superhydrophobic sponge with hierarchical microstructures was fabricated by embedding ND-ODA into a melamine sponge (MS) skeleton via a simple immersion-drying process. The as-prepared sponge (ND-ODA@PDMS@MS) showed superhydrophobic properties with a water contact angle of 155 ± 2°. For various oils and organic solvents, ND-ODA@PDMS@MS possesses excellent absorption capacity (26.65–55.64 g/g) and oil/water separation efficiency (above 98.6%). Furthermore, the adsorption capacity to crude oil remained relatively stable in highly acidic, alkaline, and salty conditions, ensuring the application in the clean-up of industrial oily sewages and marine oil spills. Besides absorbing oil for a single time, ND-ODA@PDMS@MS also exhibited satisfactory performance in continuous oil/water separation. Therefore, this work provides a facile strategy to produce robust and efficient absorbent materials for oil/water separation in large-scale oil and organic solvent clean-ups.
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International Journal of Nanomedicine
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2022
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IF 7.033
Jiangxiu Niu,Ming Yuan,Zhaowei Zhang,Liye Wang,Yanli Fan,Xianghui Liu,Xianming Liu,Huiyuan Ya,Yansong Zhang,Yang Xu
Background The poor skin permeation and deposition of topical therapeutic drugs is a major issue in topical drug delivery, improving this issue is conducive to improving the topical therapeutic effect of drugs. Methods In this study, octadecylamine modified hyaluronic acid (OHA) copolymer was synthesized by amide reaction technique to prepare curcumin (CUR)-loaded micelles (CUR-M) for topical transdermal administration. CUR-M was successfully prepared by dialysis, and the formulation was evaluated for particle size, zeta potential, surface morphology, entrapment effciency (EE%), drug loading (DL), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and the in vitro drug release. Additionally, in vitro skin permeation and retention, in vivo topical analgesic and anti-inflammatory activity, and skin irritation were assessed. Results The mean drug loading (DL), drug entrapment efficiency (EE), hydrodynamic diameter and zeta potential of CUR-M were 8.26%, 90.86%, 165.64 nm and −26.85 mV, respectively. CUR-M was characterized by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR), it was found that there was an interaction between CUR and OHA, and CUR existed in CUR-M in an amorphous form. CUR-M exhibited sustained release in 48 h and good stability at 4 °C for 21days. CUR-M could significantly increase the skin penetration and retention of CUR and had better analgesic and anti-inflammatory activities in vivo when compared with CUR solution. Hematoxylin-eosin staining results revealed that the transdermal penetration mechanism of CUR-M might be related to the hydration of stratum corneum by HA. In addition, CUR-M showed no skin irritation to mouse skin. Conclusion CUR-M might be a promising and safe drug delivery system for the treatment of topical diseases.
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Nanoscale Research Letters
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2022
·Vol. 17
·期 1
·1-11
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IF 5.418
Jiang Xingwang,Cheng Jie,Liu Ping,Gao Qingguo,Liu Liming
High-quality four-layer molybdenum disulfide (MoS 2 ) nanosheets with lateral dimension of about 11 µm were prepared by ultrasonic treatment of MoS 2 powder with assistance of 1-methyl-2-pyrrolidone (NMP) solvent. The optimal preparation conditions for the preparation of MoS 2 nanosheets were investigated from the aspects of ultrasonic processing time, ultrasonic power and amount ratio of MoS 2 powder and NMP solvent. At the same time, the MoS 2 nanosheets were employed as anode buffer layer in organic light-emitting diode (OLED) with copper nanowire (CuNW) film being anode. MoS 2 nanosheets can reduce roughness of CuNW film, protect CuNW film from oxidation and improve work function of CuNW film. Experiments show that MoS 2 nanosheets can significantly improve the current density and brightness of the OLED with CuNW film being anode. The maximum brightness of the OLED with MoS 2 anode buffer layer is 2.15 times that of the OLED without MoS 2 anode buffer layer. The current density of the OLED with MoS 2 anode buffer layer is also obviously increased compared with the OLED without MoS 2 anode buffer layer.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Kaili Wang,Tao Zhang,Xiao Xiao,Xinyu Fang,Xiaorong Liu,Youming Dong,Yanjun Li,Jianzhang Li
Bamboo is easily affected by moisture and mold, etc., causing performance deterioration, which limits the practice application. Phytic acid (PA) as abundant biomass resources , can form the polyelectrolyte complexes with cationic charged compounds, and also the coordination complexes with metal ions . In this work, the green and transparent superhydrophobic coating on bamboo surface was developed by deposition and assembly of PA-based hybrid complexes and subsequent hydrophobic treatment. The micro-/nano- hierarchical structure supported by hybrid complexes and the low energy component provided by octadecylamine both contributed to the excellent superhyophobic performance. The contact angle and sliding angle of the modified bamboo surface were 153.2° and 7.5°, respectively, and exhibited great environment and chemical durability. In addition, the superhydrophobic coating endowed bamboo with mildew resistant property. This work demonstrates the potential of PA-based hybrid complexes as constructing superhydrophobic coatings, and also provides an avenue for the fabrication of green and transparent superhydrophobic coatings on bio-based material surfaces.
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JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
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2022
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IF 5.062
Zimin Cai,Qin Wang,Jinzhuan Xu,Jia Zhou,Zhaohui Jiang,Di Pan,Yanyan Zhang,Ling Tao,Jianqing Peng,Yi Chen,Xiangchun Shen
Emphysema is a type of chronic obstructive pulmonary disease (COPD) usually leading to difficulty breathing. It is highly in need of effective interventions to prevent airspace damage and stretch. Herein, we studied the protective effect of 1,8-cineole (CIN) on porcine pancreatic elastase (PPE)-induced emphysema in mice via quantitative pulmonary administration. To overcome the volatility, instability and poor water solubility of CIN that limits its pharmacological activities in vivo , a hyaluronic acid (HA)-coated liposome was prepared to encapsulate CIN (Lipo/ [email protected] ), which facilitated the delivery of CIN to lung tissue and improved its therapeutic effect for emphysema. A Microsprayer Ⓡ aerosolizer was used to deliver free CIN and its liposomal preparations every other day for four weeks and evaluate the therapeutic effects on emphysema in mice. The results clearly showed that CIN significantly reduced the level of inflammation and oxidative stress, resulting in less lung cell apoptosis. Compared with the free CIN and Lipo/CIN, Lipo/ [email protected] exhibited superior protective effects on mice to prevent the PPE-induced emphysema. Furthermore, the therapeutic mechanisms were verified to be mainly mediated by Nrf2/NQO1 and NF-κB/IκBα pathways. In conclusion, quantitative pulmonary administration of CIN could alleviate the progression of emphysema and the therapeutic effects were further improved by the HA-coated liposome carrier.
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Lubrication Science
·
2022
·Vol. 34
·期 7
·441-448
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IF 1.307
Hongxia Ma,Wei Wu,Zeyun Wang
In this work, TiO 2 nanoparticles modified with octadecylamine and dodecyl mercaptan (DDM/ODA@PDA@TiO 2 NPs) are uesd to improve the tribological properties of the white oil. The DDM/ODA@PDA@TiO 2 NPs which are simply prepared by mussel inspired chemistry and the Michael addition reaction can be facilely dispersed in the white base oil. Tribological measurements showed that the dispersion of the white oil containing 3 wt% DDM/ODA@PDA@TiO 2 NPs displays significant reductions in the friction coefficient and wear scar diameter at room temperature and 75°C. Further XPS investigation shows that the favourable tribological properties of DDM/ODA@PDA@TiO 2 NPs are ascribed to the synergistic effect of tribofilm (Fe 2 O 3 , Fe 3 O 4 , FeS 2 , FeS and FeSO 4 ) and TiO 2 nanofluids.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Chuanjin Yin,Xueju Qi,Shuhan Zhao,Xiangsheng Han,Chuanlong Guo,Xiaochen Wu
Industries and daily life produce large amounts of oily wastewater. For the efficient and economical separation of oil and water mixtures, silk microfibers (SM) were integrated with aramid nanofibers (ANF) to fabricate a hydrophobic and oleophilic O-SM/ANF sponge through a facile HCl volatilization method followed by hydrophobic surface modification. The O-SM/ANF sponges showed low density of 0.04–0.13 g/cm 3 , water contact angle of 130–138°, high absorption capacities up to 11.4–20.7 times of their own weight, and can be recycled for > 20 times by manual squeezing. The O-SM/ANF sponges exhibited high separation efficiencies for both immiscible oil/water mixtures and oil/water emulsions, desirable as oil/water separation materials.
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Chemical Science
·
2022
·Vol. 13
·期 35
·10315-10326
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IF 9.969
Jie Chen,Zelian Xu,Jingcheng Zheng,Haishan Wu,Yuwu Chi
Photoresponsive luminescent materials (PLMs) have attracted much attention in various optoelectronic fields, especially in optical data storage. Multi-wavelength (N-wavelength) based optical storage is a promising approach to increase the data storage density, but its current application is limited by the fact that most PLMs have only two-wavelength emissive states after certain light excitation, which requires simultaneous use of several PLMs and different irradiation light sources. In this study, we discovered that the wavelength of perovskite nanocrystals (PNCs) in the presence of dichloromethane (DCM) could be continuously and precisely tuned over a very wide color range (from red to violet) with the help of a single UV light source. The changes in crystal structures and optical properties of PNCs during UV irradiation were investigated in detail; the effects of capping ligand, solvent, UV irradiation power and time were evaluated, and the mechanism of UV triggered PNC fluorescence change was studied and is discussed. Finally, the applicability of PNCs/DCM film in N-wavelength-based high-density optical data storage was verified.
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Frontiers in Chemistry
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2022
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IF 5.545
Niu Jiangxiu,Yuan Ming,Liu Yao,Wang Liye,Tang Zigui,Wang Yihan,Qi Yueheng,Zhang Yansong,Ya Huiyuan,Fan Yanli
The present study focused on the development of Cur-loaded SOHA nanogels (Cur-SHNGs) to enhance the topical administration of Cur. The physiochemical properties of Cur-SHNGs were characterized. Results showed that the morphology of the Cur-SHNGs was spherical, the average size was 171.37 nm with a zeta potential of −13.23 mV. Skin permeation experiments were carried out using the diffusion cell systems. It was found that the skin retention of Cur-SHNGs was significantly improved since it showed the best retention value (0.66 ± 0.17 μg/cm2). In addition, the hematoxylin and eosin staining showed that the Cur-SHNGs improved transdermal drug delivery by altering the skin microstructure. Fluorescence imaging indicated that Cur-SHNGs could effectively deliver the drug to the deeper layers of the skin. Additionally, Cur-SHNGs showed significant analgesic and anti-inflammatory activity with no skin irritation. Taken together, Cur-SHNGs could be effectively used for the topical delivery of therapeutic drugs.
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