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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COLLOIDS AND SURFACES B-BIOINTERFACES
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2022
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IF 5.999
Yuancun Cheng,Xiaoyi Zheng,Liying Zhang,Jiulong Zhao,Lianghao Hu,Shige Wang
The degradation of extracellular matrix (ECM) to increase drug permeability is an attractive approach to enhancing pancreatic cancer therapy efficiency. Herein, polypyrrole nanoparticles (PPy NPs) were prepared by a template-guided chemical oxidation method. These PPy NPs with abundant surface pores were used to load the anticancer drug doxorubicin (DOX). In order to intelligently control the DOX release, PPy/DOX NPs were further entrapped with a thermoresponsive ligand, lauric acid (LA), to form PPy-LA/DOX NPs. Bromelain (BL) was then grafted onto the surface of PPy-LA NPs or PPy-LA/DOX NPs through an amidation reaction with the carboxyl group of LA. It was found that the DOX release of PPy-LA/DOX NPs was pH and temperature responsive, reaching a maximum amount of 85.9% within 48 h at pH = 5.4 and 50 °C. Moreover, it was demonstrated that the resultant PLB (PPy-LA-BL) NPs could efficiently hydrolyze the collagen in ECM and enhance the permeability of DOX to the pancreatic tumor. Remarkably, PLB NPs not only featured admirable photothermal conversion but also exhibited obvious photoacoustic imaging capability, which enabled imaging-guided enhanced tumor ablation. This study is anticipated to provide a feasible strategy to improve the permeability of nanoparticles to tumors.
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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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Polymers
·
2022
·Vol. 14
·期 22
·4910
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IF 4.967
Jianyun Wu,Wenhe Zhou,Xiaowei Wang,Shicheng Li
Polyimide (PI) film is widely used as the key component of the capacitive humidity sensor, whose diffusion coefficient has a significant impact on the sensor’s dynamic characteristics, but is rarely discussed. This paper provides a test method and processes for effective diffusion coefficients of water molecules in self-synthesis PI films. The films were formed by four ingredients (PMDA-ODA, BPDA-ODA and BPDA-BAPP, PMDA-BAPP) with PI acid concentrations of 23%, 20%, 17% and 15%, and tested in temperatures of 20 °C, 35 °C and 50 °C, respectively. The results indicated that BPDA-BAPP film was good as a moisture sensitive film, whose average effective diffusion coefficient was 2.709 × 10−14m2/s. The temperature of the environment had a significant effect on the humidity-sensitive properties, but the PI acid concentration effect could be indirect.Keywords:humidity sensor;polyimide film;humidify-sensitive properties;effective diffusion coefficient
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Energy Reports
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2022
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IF 4.937
Lili Jiang,Le Zhao,Guangyuan Chen,Meixia Li,Ruijia Zhang
In this study, octadecylamine/graphite foam composite phase change materials (ODA/GF CPCMs) were prepared by vacuum impregnation; octadecylamine (ODA) was used as the phase change materials (PCMs), and graphite foam (GF) was used as the support material. Polyurethane (PU) foam obtained after hydrolysis in 40 wt% NaOH solution at 80 °C for 30 min was the template for the GF; therefore, the prepared GF has many interpenetrating pore structures, providing many adsorption sites for PCMs. For the ODA/GF-3 CPCMs with 15 wt% graphite addition, the loading of ODA is as high as 92.3%, the thermal stability is excellent, the melting temperature is 52.1 °C, and the latent heat of fusion is 218. 1 J/g, which is 1.1 times that of pure ODA. The thermal conductivity of ODA/GF-3 CPCMs is 0.725 W/m•K, which is 2.2 times that of pure ODA. These results indicate that ODA/GF CPCMs have good thermal properties, and their competitiveness in the field of energy storage is greatly improved due to their excellent performance.
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Nanoscale
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2022
·Vol. 14
·期 45
·16961-16967
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IF 8.307
Dongdong Ma,Xiangyi Zhang,Kaimin Deng,Jingjing Huang,Ruquan Zhang,Hongjun Yang,Xin Liu,Bin Shang,Shaojin Gu
Solar driven interfacial vapor generation is considered to be an effective strategy to alleviate the impact of water crisis on human activities. However, great efforts of researchers have been devoted to improving the solar steam generation efficiency, while less attention has been paid to the long-term stability of evaporators. Herein, we proposed a robust core–shell structured evaporator prepared by a simple fast curing assisted spray-coating method. Owing to the inherent superelasticity of melamine–formaldehyde (MF) sponge, the finely designed novel 3D core–shell structure, and the quick curing of branched polyethyleneimine (BPEI) and 5-pentaerythritol pentaacrylate (5Acl) induced special knot shaped photothermal coating, the as-obtained evaporator (CB/MF) performed well in vapor generation with a high water evaporation rate of 2.082 kg m−2 h−1 under 1 sun illumination, and the evaporation efficiency reached 123.5%, which is comparable to the state-of-the-art artificial solar evaporator. Even in strict application situations, such as long-term recycling testing for 40 h, 500 compression-release cycles (20%, 40% or 60%), sonication for 12 h, or shaking for 30 h, the water evaporation rate of the obtained evaporator remains at a high level of above 2.00 kg m−2 h−1. Additionally, the evaporator shows effective purification toward high-concentration brine, acid–base solutions, simulated seawater, dye wastewater, and heavy metal wastewater, as well as reliable pure water, providing an outdoor application. With the advantages of a high evaporation rate, stable long-term vapor generation, and effective purification toward various non-potable water sources, we believe that the fabricated core–shell structured CB/MF evaporator is a promising candidate for practical solar steam generation.
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JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
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2022
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IF 5.168
Erdong Yao,Yuechun Wang,Hao Bai,Lianqi Sheng,Jianhua Guo,Junjian Li,Kun Zhang,Guolin Yu,Fujian Zhou
With the development of nanotechnology, nanomaterials have shown good potential for enhanced oil recovery , which is of great significance for oil and gas production. Compared with nanoparticles and nanoemulsions , nanosheets have higher interfacial activity due to their two-dimensional structure, which can form a climbing film on the interface of oil-water and efficiently improve oil recovery. However, the influencing factors of the film-climbing effect and the relationship between the film-climbing effect and enhanced oil recovery are still not clear. In this paper, small-sized water-soluble nanosheets which were molybdenum disulfide (MoS 2 ) nanosheets (30–50 nm) were synthesized using a one-step hydrothermal method , which have strong stability during the flooding test. And then, modifiers with different carbon chain lengths were used to modify the hydrophile-lipophile balance (HLB) of nanosheets. Next, the influencing factors of nanosheets' climbing film were discussed, and the two-phase height index was innovatively used to characterize the strength of the nanosheets climbing film in the oil-water system. The results show that the longer the carbon chain length of the modifier, the closer the nanosheets are to neutral wet with stronger interfacial activity. In addition, molybdenum disulfide nanosheets can produce a climbing film at the oil-water interface, which is related to salinity , concentration, and diameter of test jar. In a word, the oil displacement efficiency can be characterized by the two-phase height index, and the higher the index, the higher the oil displacement efficiency. This makes us fully realize the importance of climbing film in tertiary oil recovery, and provides a new method for the effective development of oil and gas resources.
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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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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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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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Chemical Science
·
2022
·Vol. 13
·期 35
·10315-10326
·
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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Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Zhiyu Liu,Ye Li,Shuangshuang Peng,Ju Huang,Bolin Su,Kai Gao,Shuai Zhou,Zhaojian Gao,Teng Chen
In this work, 3D flowerlike Ag NPs/NiCo-layered double hydroxide (NiCo-LDH) decorated on melamine sponge was fabricated through a facile hydrothermal and in-situ reduction method. 3D flowerlike Ag NPs/NiCo-LDH were demonstrated to immobilize on the skeleton of polydopamine-pretreated melamine sponge. The melamine sponge decorated with 3D flowerlike Ag NPs/ NiCo-LDH presented outstanding catalytic activity for reduction of various water-soluble organic dyes in the appearance of NaBH 4 as reducing agent, including 4-nitrophenol (4-NP), rhodamine B (RhB), methylene blue (MB) and methyl orange (MO), respectively. Owing to the appearance of Ag NPs, the melamine sponge decorated with 3D flowerlike Ag NPs/NiCo-LDH also showed efficient antibacterial activities against Gram-positive Staphylococcus aureus and Bacillus cereus , and Gram-negative Escherichia coli and Pseudomonas aeruginosa , suggesting its broad-spectrum antibacterial property. Moreover, the melamine sponge decorated with 3D flowerlike Ag NPs/ NiCo-LDH could also achieve the separation process for insoluble oils/organics from water by a facile surface modification technology after being treated toward low-surface-energy chemical of octadecylamine. The octadecylamine-coated sponge exhibited superhydrophobicity (WCA=158.6°) and superoleophilicity (OCA=0°), which could adsorb a wide range of oils/organics without the adsorption of any water, thus realizing the process of oil/water separation. The novel comprehensive melamine sponge demonstrates a new strategy for the remediation of complex polluted water.
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