INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2021
·Vol. 22
·期 18
·9668
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IF 5.924
Xiaoxuan Yu,Hui Li,Dongfa Lin,Weizhuo Guo,Zhihao Xu,Liping Wang,Shuwen Guan
Panax ginsengis a valuable traditional Chinese medicine in Northeast China. Ginsenoside, the active component of ginseng, has not been investigated much for its effects on aging and its underlying mechanism(s) of action. Here, we investigated the effects of total ginsenoside (TG), a mixture of the primary active ginsenosides fromPanax ginseng, on the lifespan ofCaenorhabditis elegans(C. elegans). We found that TG extended the lifespan ofC. elegansand reduced lipofuscin accumulation. Moreover, TG increased the survival ofC. elegansin response to heat and oxidative stress via the reduction of ROS. Next, we used RNA-seq to fully define the antiaging mechanism(s) of TG. The KEGG pathway analysis showed that TG can prolong the lifespan and is involved in the longevity regulating pathway. qPCR showed that TG upregulated the expression ofnrh-80,daf-12,daf-16,hsf-1and their downstream genes. TG also reduced the fat accumulation and promoted lipid metabolism. Moreover, TG failed to extend the lifespan ofdaf-16andhsf-1mutants, highlighting their role in the antiaging effects of TG inC. elegans. The four main constitution of TG were then confirmed by HPLC and included ginsenoside Re, Rg1, Rg2and Rd. Of the ginsenosides, only ginsenoside Rd prolonged the lifespan ofC. elegansto levels comparable to TG. These findings provided mechanistic insight into the antiaging effects of ginsenoside inC. elegans.Keywords:Panax ginseng;lifespan;lipid metabolism;stress-resistant;Caenorhabditis elegans
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Soft Matter
·
2021
·Vol. 17
·期 41
·9363-9370
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IF 3.679
Haifeng Liu,Yifeng Sun,Zhonghui Chen
Hydrophobic/oleophilic sponges are excellent absorbent materials for oil contaminant removal. However, the application is limited in dealing with surfactant stabilized O/W emulsions. The water in the emulsion isolates the contact between the sponge and oil droplets. Consequently, the oil absorption efficiency is not ideal. Herein, to improve the oil absorption efficiency from anionic surfactant stabilized O/W emulsions, water responsive hybrid sponges were reported. To prepare such sponges, water soluble poly(N,N-dimethylaminoethylmethacrylate) (PDMAEMA) was introduced into polydimethylsiloxane (PDMS) sponges using table salt as a template and multi-walled carbon nanotubes (MWCNTs) as mechanical reinforcement in a one-pot method. Upon contact with an O/W emulsion, the water soluble PDMAEMA chain rose to the surface of the sponge, turning the hydrophobic surface into hydrophilic. Next, the tertiary amine groups in PDMAEMA ionized in water and carried positive charges which would cause the coagulation of oil droplets. Finally, the coagulated oil droplets were absorbed immediately by the oleophilic inner part of the sponge through the wicking effect. As a result, a Janus interface was generated in situ and sustained. Such material design synergistically contributed to a satisfactory hexadecane (HD) absorption efficiency of 178 ± 4% in 25 min. In contrast, the PDMS-MWCNT1.0% sponge could only absorb 9.8 ± 0.2% HD. Moreover, these sponges also presented robust mechanical performance and reusability, offering a new route for oil/water separation and oil pollution remediation in open water.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xufei Li,Baoyou Yan,Weiqiu Huang,Hui Bian,Xinya Wang,Jiahui Zhu,Shaocan Dong,Yuyu Wang,Weihua Chen
To overcome the shortage of conventional synthetic methods, such as long reaction time at high temperature and pressure (HTP) or poor performance at room temperature and pressure (RTP), a facile and economical strategy was employed to prepare high-performance ZIF-90 for the first time at RTP only by adding triethylamine (TEA). Herein, we successfully prepared ZIF-90 nanocrystals by a two-step stirring method within several minutes (5–30 min) and their structure parameters (e.g., BET surface areas, 916–1235 m 2 ·g −1 ) were also tuned simultaneously, which were much better than reported samples prepared at RTP. Afterwards, by changing functional ligands, hydrophobic ZIF-90-CF 3 with low surface energy was also designed. With the ligand side of aldehyde (–CHO) and trifluoromethyl (-CF 3 ) groups on ZIF-90 and ZIF-90-CF 3 , the water vapor uptakes and adsorption heats decreased from 7.9 to 0.79 mmol·g −1 and 20.6 to 2.6 kJ·mmol −1 , respectively. Additionally, a shaped ZIF-90-CF 3 /melamine foam (MF) composite with both hydrophobic and oleophilic properties exhibited extraordinary organic compounds (OCs)-water separation ability, including a high adsorption capacity (40.1–108.7 g‧g −1 ) towards various OCs. Furthermore, owing to its excellent compressibility and mechanical stability, the ZIF-90-CF 3 /MF composite can be regenerated by slightly squeezing the adsorbed OCs, indicating the potential for possible commercialisation of the derived MOF/MF composites for the efficient purification of wastewater.
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CHEMICAL ENGINEERING SCIENCE
·
2019
·
IF 3.372
Shuangqing Sun,Xiqiang Zhang,Shengxiang Feng,Hongbing Wang,Yan Wang,Jianhui Luo,Chunling Li,Songqing Hu
A novel CO 2 /N 2 switchable aqueous foam was developed using a CO 2 -responsive surfactant N,N-dimethyl-N-dodecyl amine (C 12 A) and a conventional surfactant sodium dodecyl sulfate (SDS). The performance and mechanism of this switchable foam were studied by both experiment and molecular simulation methods. Experimental results demonstrate that the foam stabilized by SDS/C 12 A surfactants has better stability and water carrying capacity than single C12A foam. The foam could be rapidly switched between stable and unstable states at ambient temperature with CO 2 or N 2 as the triggers. Simulation results shows that when CO 2 was introduced, most of SDS and C 12 A molecules aggregated in the water phase, instead of adsorbing at the air-water interface to stabilize the foam films. The strong electrostatic attraction between protonated C 12 A and SDS molecules could account for the aggregation. Due to the presence of limited surfactants located at the air-water interface after introducing CO 2 , the foam bursts quickly.
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JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Mengjie Zhang,Wenjing Ma,Jiaxin Cui,Shutian Wu,Jingquan Han,Yan Zou,Chaobo Huang
As oily wastewater issues continue to grow, the treatment of oily wastewater has become urgent an emergency. However, present solutions are restricted by the limited performance of materials. An UV-resist and transparent coating consisting of PDMS and ZnO decorated on a highly stable and self-standing polyimide is reported in this work as a potential solution. The obtained fibrous membranes not only allow high-efficiency (higher than 99%) oily wastewater separation but also show superior UV-resistant activity. Moreover, the superoleophilicity and hydrophobicity of the composite membrane were confirmed to be stable under harsh conditions, and the transparent coating layer has the potential to be applied in other fields. The design of the UV-resistant, transparent and superoleophilic nanofibrous membrane is very practical, and will be quite promising for reducing oily environmental contaminations from waters.
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MATERIALS & DESIGN
·
2019
·
IF 5.77
Peng Xu,Jin Yang,Yu Chen,Yong Li,Xiaohua Jia,Haojie Song
The removal of emulsified oil and organic dyes from wastewater is of extreme challenge owing to their difference of physical and chemical properties. Here we choose cellulose fibers derived from wood as supporting materials and the irregular flake-like BiOBr and sphere-like AgBr are in situ grown on the fibers via freeze-drying, which successfully create wood-derived fiber/BiOBr/AgBr (WFBA) sponge for wastewater treatment. The obtained WFBA sponge reveals favorable mechanical strength at a strain of 60% and 50 cycles of compression tests. In view of the superhydrophilicity and underwater superoleophobicity of WFBA sponge, it can be used for separating surfactant-stabilized kerosene-in-water emulsions with oil rejection ration higher than 99.91%, and simultaneously adsorbing organic dyes with removal efficiency >99.99%. Furthermore, the polluted WFBA sponge is capable of realizing dye degradation under Xe lamp, solar light and fluorescent lamp due to its enhanced photocatalytic activity. Thus, the regenerated sponge can take full advantage of functionalities of emulsion separation and dye adsorption, as presented by that the oil rejection ration still keeps as high as 98.23% and removal dye efficiency remained over 99.90% after five cycles of filtration. This study provides a feasible and scalable approach to engineer versatile materials for wastewater treatment.
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Na Han,Chao Yang,Zongxuan Zhang,Weijing Wang,Wenxin Zhang,Changye Han,Zhenyu Cui,Wei Li,Xingxiang Zhang
The efficient treatment of oil–water emulsions in extreme environments, such as strongly acidic and alkaline media, remains a widespread concern. Poly(phenylene sulfide) (PPS)-based porous membranes with excellent resistance to chemicals and solvents are promising for settling this challenge. However, the limited hydrophilicity and the poor hydrated ability of the hydrophilic PPS (h-PPS) membranes reported in the literature prevents them from separating oil–water emulsions with high efficiency, large fluxes, and good antifouling performances. In this study, a firm rough TiO2 layer is constructed on a h-PPS membrane via electrostatic assembly to improve the surface hydrophilization. The introduction of the TiO2 layer increases the wetting selectivity and decreases the oil adhesion, which makes it capable to efficiently treat oil-in-water emulsions (efficiency > 98%). Most importantly, the underwater critical oil intrusion pressure almost doubled after the incorporation of the TiO2 layer, which allows the membrane to withstand pressurized filtration, achieving a high flux of ∼4000 L m–2 h–1. This is more than 2 orders of magnitude larger than the flux of the reported h-PPS. Furthermore, the TiO2@h-PPS membrane displays long-term stability in separating oil–water emulsions in strong acid and strong alkali, showing a promising prospect for the treatment of strongly corrosive emulsions.
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2019
·
IF 3.973
Yuxiang Sun,Fangfang Shi,Yajun Niu,Yu Zhang,Fei Xiong
Lipid deposition induced various diseases including nonalcoholic fatty liver and hyperlipemia. The excessive accumulation of triglyceride (TG) and the deposition of fat were the two most critical causes. Here, we developed Fe 3 O 4 @ [email protected] nanoparticles (NPs) with amphiphilic structures, which exhibited an excellent role in eliminating excess TG. Hydrophobic TG was adsorbed efficiently by Fe 3 O 4 @ [email protected] NPs through the “liposuction effect” and the formation of [email protected] complex was then conducted. The [email protected] complex was further enclosed by the endosome based on the endocytosis and subsequently was taken into the lysosome, degrading with the help of lipases. Meanwhile, the “nano-enzyme effect” of Fe 3 O 4 NPs recovered the lipid-regulated proteins including PPARα, further triggering biodegradation pathways of TG, although the lipid-regulated proteins were obviously inhibited in the high-fat hepatocytes models. These two mechanisms of Fe 3 O 4 @ [email protected] NPs together achieved the down-regulation of TG in vivo and in vitro. Therefore, our findings provided a novel thought in treating these diseases associated with lipid deposition, that is, nanoparticles modified by specific structure exhibit a superior TG removal.
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JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Ji-Hao Zuo,Yi-Hang Gu,Chao Wei,Xi Yan,Yan Chen,Wan-Zhong Lang
Janus membrane is an emerging separation material due to its unique separation performance. The asymmetric surface wettability on its two surfaces is crucial for a Janus membrane. In this work, robust Janus polyvinylidene fluoride (PVDF) membranes were prepared via thermal induced phase separation (TIPS) accompanied with spray-coating method. The two surfaces of TIPS-prepared PVDF membranes were rapidly deposited with polydopamine/polyethyleneimine (PDA/PEI) and micro-/nano-scale silica particles crosslinking with diphenyldichlorosilane respectively. The spray-coating endows the Janus membranes with superhydrophilicity and superhydrophobicity on its opposite surfaces. The optimized membrane of M-A0.9B0.2 presents an asymmetric surface wettability. Its hydrophilic surface has a water contact angle (WCA) of 11.2°, while the hydrophobic surface has a WCA of 169.9° as well as a sliding angle of <1°. The superhydrophilic surface allows water to quickly pass through the membrane and oil phase is trapped; while oil can penetrate through the membrane and water is rejected by the superhydrophobic surface. The Janus membranes show excellent separation performance with the highest permeation of 2060.5 L m −2 h −1 ·bar −1 accompanied with above 94.0% oil rejection for toluene-in-water emulsion and the highest permeation of 1769.0 L m −2 h −1 ·bar −1 accompanied with above 97.0% water rejection for water-in-toluene emulsion using the opposite surfaces.
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CELLULOSE
·
2020
·Vol. 27
·期 5
·2847-2857
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IF 4.21
Yang Maiping,Liu Weiqu,Liang Liyan,Jiang Chi,Liu Chunhua,Xie Yankun,Shi Hongyi,Zhang Fengyuan,Pi Ke
Abstract In this work, we proposed a mild and fluorine-free strategy for fabricating robust superhydrophobic coatings with TiO 2 , 3-mercaptopropyltriethoxysilane (MPTS) and polyhedral oligomeric silsesquioxanes using dip-coating and thiol-ene click reaction. The modified cotton exhibited superb superhydrophobicity with a WCA of 157.6°, which showed anti-wetting property in both water and air. Moreover, the durability of the treated cotton against acid and alkaline solutions, different temperatures, abrasion and peeling tests was verified. The highlight is the dual self-cleaning afforded by superhydrophobicity and photocatalytic degradation. The oil red O was adopted as organic pollutant model and could be decomposed completely with the aid of resultant coating after UV irradiation for 3 h. In addition, the modified cotton could be used as filter material and has the potential in the application of oil–water separation. After seven separation cycles, the separation efficiency still maintained 99.0%, while the WCA of cotton kept as high as 154.6°. Therefore, the above-mentioned features demonstrated that this fluorine-free method could reduce the usage of long-chain fluorinated polymers and prepare superhydrophobic cotton which could be applied in self-cleaning as well as oil–water separation fields. Graphic abstract
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SURFACE & COATINGS TECHNOLOGY
·
2019
·
IF 3.192
Yali He,Menghui Wan,Zhihua Wang,Xia Zhang,Yanbao Zhao,Lei Sun
A simple and mild low-cost method for fabricating fluoride-free super-hydrophobic cotton fabrics is presented. The two-step method involves the decoration of the cotton fabrics by ZnO nano-rods to construct rough surface and the grafting of low surface energy stearic acid (SA) onto the as-decorated cotton fabrics via an immersion route. The as-prepared ZnO/SA modified cotton fabrics were characterized by X-ray powder diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, atomic force microscopy and Fourier transform infrared spectroscopy . The wetting behavior of coffee, milk, tea, water dyed by methylene blue, strong acid (HCl), strong alkali (NaOH), and saturated salt solution (NaCl) on the ZnO/SA modified cotton fabrics was evaluated with a contact angle tester, and the durability of the ZnO/SA modified cotton fabrics in corrosive liquids and under ultraviolet (UV) irradiation was tested. In addition, the oil/water separation efficiency of the ZnO/SA modified cotton fabrics towards the oil/water mixed solutions of n -hexane, liquid paraffin, dichloromethane, chloroform and motor oil with different density and viscosity was investigated; and their degradation rate under harsh conditions (e.g., immersion in acid and alkali or exposure to UV irradiation) was calculated. Results demonstrate that ZnO and SA are chemically bonded onto the surface of cotton fabrics to achieve super-hydrophobicity. The as-prepared ZnO/SA modified cotton fabrics exhibit a water contact angle of over 164°; and they retain the super-hydrophobicity after immersion in acid and alkali solutions or under UV irradiation. Besides, they have an oil/water separation efficiency of over 96.5% for all the tested liquids as well as a biodegradability rate of 59.0% after immersion in phosphate buffer saline solution containing cellulase (pH = 4.8) for 15 days. Therefore, the present approach could be applicable to constructing durable super-hydrophobic cotton fabrics with promising potential for oil/water separation in industry.
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Soft Matter
·
2019
·Vol. 15
·期 47
·9727-9732
·
IF 3.399
Guanzhou Luo,Li Wang,Xinying Li,Kai Yang,Yongle Luo,Shouping Xu,Pihui Pi,Xiufang Wen
A facile method that combines alkali-assisted oxidation and –SH chelation with a click chemistry reaction was employed to create an F-POSS polymer surface (fluorinated octavinyl polyhedral oligomeric silsesquioxane polymer)-based Cu mesh (F-POSS-OM). The as-prepared F-POSS-OM surface displayed a cohering hierarchical nano-F-POSS polymer granule/micro-Cu(OH)2 wire structure, which provided a re-entrant geometry needed for liquid-repellency and low liquid sliding angles (<15°). Moreover, the easy-prepared structure endows the F-POSS-OM with remarkable durability for mechanical and chemical damages, including wear abrasion, tape-peeling, 100 cm-height hammer impact, severe hand twisting, strong acid/base/salt solutions, and high temperatures. Importantly, F-POSS-OM still retained excellent self-cleaning performance even after being subjected to these damages.
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危险品化学品经营许可证（带存储）