Journal of Environmental Chemical Engineering
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2026
·Vol. 14
·期 2
·121811
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IF 7.5
Xiuchan Xiao,Jun Wang,Huamei He,Zhicheng Feng,Chaoran Duan,Jungang Yuan,Ya Liu
The high treatment costs and substantial energy consumption associated with high-salinity fracturing flowback fluids remain critical bottlenecks restricting the development of shale gas. This study constructed a functionalized layered oil-water hydrogel solar interfacial evaporator (FG-SWE), aiming to achieve low energy consumption and zero emission treatment of high-salinity fracturing flowback fluids. The evaporator was synthesized via one-pot polymerization and consists of three functional layers (top: MXene, middle: 12-hydroxystearic acid (HSA)-based, bottom: porous), each responsible for light absorption, thermal management, and water transport, respectively. Results showed that under one sun irradiation, FG-SWE demonstrated an evaporation rate of 2.80 kg m −2 h −1 and a photothermal conversion efficiency over 95 % in 10 wt% standard saline waters, with the hydrophobic area ratio of the evaporation interface set at 30 %. Furthermore, the phase-change heat storage layer has a melting enthalpy of 125.8 kJ kg −1 , enabling continuous nighttime evaporation with a daily water production of 17 kg·m −2 . Furthermore, the FG-SWE effectively treated high-salinity flowback fluid, reducing total dissolved solids content (TDS) from 8 × 10 4 mg L −1 to < 125 mg L −1 to meet drinking water standards. The evaporator also demonstrated excellent anti-fouling properties and long-term stability, retaining 90.7 % performance over 30 days of continuous operation. This study provides a promising technology for high-salinity wastewater, thereby supporting the green development of shale gas and enhanced recycling of water resources.
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高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Zhen Wang,Shuqi Hu,Asad Ali,Hongling Chen,Pei Kang Shen
The development of highly active and stable catalysts is a critical challenge which affects the practical application of the direct methanol fuel cells. Alloying Pt with other metals is an effective strategy to form the bimetallic or trimetallic catalysts, which not only decreases the consumption of Pt but also optimizes the electronic structure of Pt, in turn enhancing the catalytic activity. Herein, we use a facile one-pot solvothermal reduction method to synthesize Ag nanocubes (NCs) enclosed by PtRh nanoparticles as a trimetallic Ag@PtRhAg NC core–shell catalyst toward methanol oxidation reaction (MOR). Notably, the core–shell structure is formed because of the presence of N,N-dimethylacetamide, which promotes the preferential reduction of Ag by reducing the reduction potential of Ag atoms. Meanwhile, the bromide ions originating from cetyltrimethylammonium bromide controlled the growth of the cubic morphology. Benefiting from the pleated exterior providing more active sites and the synergistic effect between Pt, Rh, and Ag, the mass and specific activities of Ag@PtRhAg NCs are 4.22 and 3.78 times higher than those of commercial Pt/C, respectively. More impressively, because of the better CO tolerance, Ag@PtRhAg NCs display strengthened durability by maintaining 84.9% mass activity after 1000 MOR cycles compared to the initial value. The present work provides a one-step strategy to synthesize a core–shell nanostructure catalyst for enhancing the MOR activity.
研究领域:
材料科学
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催化化学
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能源化学
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高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2021
·Vol. 42
·期 7
·2000661
·
IF 5.734
Jianlei Lu,Mengdi Xu,Yi Lei,Lihao Gong,Chuanzhuang Zhao
The synthesis of thermo-responsive polymers from non-responsive and water-soluble monomers has great practical advantages but significant challenges. Herein, the authors report a novel aqueous copolymerization strategy to prepare polymers with tunable upper critical solution temperature (UCST) or lower critical solution temperature (LCST) from non-responsive monomers. Acrylic acid (AAc), N -vinylpyrrolidone (NVP), and acrylamide (AAm) are copolymerized in water, yielding copolymers with UCST behavior. Interestingly, by simply replacing AAm with its methylated homologue, dimethyl acrylamide (DMA), the thermo-responsiveness of the copolymers is converted into LCST-type. The cloud points of the copolymers can be tuned rationally with their monomer ratios and the condition of the solvent. The UCST property of the poly(AAc–NVP–AAm) comes from the AAc–AAm and AAc–NVP hydrogen-bonds, while the LCST property of poly(AAc–NVP–DMA) originates from the hydrophobic aggregation of AAc–NVP complex and DMA, as indicated by temperature-dependent 1 H NMR and dynamic light scattering.
研究领域:
材料科学
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高分子化学
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PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
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2021
·
IF 3.975
Yong Gao,Amin Deng,Xionghui Wu,Changsheng Sun,Chenze Qi
Injectable multi-responsive hydrogels are very important and exhibit many potential applications in biologically relevant fields. In this work, the preparation of injectable multi-responsive hydrogels at near-physiological conditions and their applications as durg carriers were demonstrated. Diol-capped poly( N, N -dimethylacrylamide)- b -poly( N -isopropylacrylamide) ((OH) 2 -PDMA- b -PNIPAM) diblock copolymers containing a disulfide linkage on the backbone and N, N -dimethylacrylamide- stat -(2-acrylamidophenylboronic acid) (DMA- stat -2APBA) copolymers were separatedly synthesized. Hydrogels were then prepared by a solution-based mixing of DMA- stat -2APBA with (OH) 2 -PDMA- b -PNIPAM diblock copolymers in PBS (pH 7.4) solution at a given temperature, i.e. 37 °C. Above the lower critical solution temperature (LCST) of diblock copolymers at around 32 °C, (OH) 2 -PDMA- b -PNIPAM copolymers self-assembled into core-shell structured macromolecular micelles with numerous diol groups on hydrophilic cornoas. Subsequent complexiation of diols with lateral PBA groups of DMA- stat -2APBA copolymers led to the formation of hydrogels. Due to the integration of a library of responsive units including boronate ester and disulfide DCBs together with thermal responsive PNIPAM blocks within the same system, the as-prepared hydrogels indicated multiple stimuli-responsiveness to pH, temperature, glucose and redox reaction as well as the mechanical field. Such multi-responsive hydrogels could be applied as potential drug carriers. The encapsulation and the stimuli-responsive release of a model drug of Rh B were demonstrated.
研究领域:
生物材料学
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药剂学
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高影响因子
DRUG DEVELOPMENT AND INDUSTRIAL PHARMACY
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2020
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IF 2.365
Zhongjuan Wang,Yueqin Liang,Yanqiu Liu,Hongying Xia,Jianqi Liu,Xingfang Jin,Zhongkun Li
Multi-drug resistance (MDR) is one of the major challenges in the successful chemotherapy of non-small cell lung cancer (NSCLC). Although RNA interference (RNAi) has been widely used to silence resistance-related genes, the effect remains unsatisfactory. In this study, we attempted to overcome MDR of NSCLC by simultaneously interfering with two RNAs that have different functions. A new pH-triggered polyglutamate brush polymer dimethylmaleic anhydride-poly(ethyleneglycol) monomethyl ether-b-polyglutamate-g-spermine (DMA-mPEG-b-PG-g-spermine, DPPGS) was designed and synthesized. The DPPGS/small interfering RNA (siRNA) complex nanoparticles (DPPGSN) were prepared. The results demonstrated that DPPGSN could be transformed from a negatively charged form into a positively charged form in the slightly acidic tumor extracellular environment. The siRNA targeting MDR1 mRNA (siMDR1) and siRNA targeting survivin mRNA (siSurvivin) could be efficiently co-delivered by DPPGS to simultaneously interfere with two genes (p < 0.01). Furthermore, DPPGS co-delivery of siMDR1 and siSurvivin lowered the IC50 value of cisplatin (DDP) in A549/DDP (p < 0.01) cells and increased the apoptosis rate of the cells (p < 0.01). Therefore, co-delivery of siMDR1 and siSurvivin using DPPGS would be a promising approach for overcoming MDR of NSCLC.
研究领域:
肿瘤学
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药剂学
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分子生物学
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PubMed
高影响因子
ADVANCED MATERIALS
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2020
·Vol. 32
·期 33
·2001222
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IF 27.398
Dewen Li,Xiaochen Bu,Zongpu Xu,Yingwu Luo,Hao Bai
Cellular plastics have been widely used in transportation, aerospace, and personal safety applications owing to their excellent mechanical, thermal, and acoustic properties. It is highly desirable to impart them with a complex porous structure and composition distribution to obtain specific functionality for various engineering applications, which is challenging with conventional foaming technologies. Herein, it is demonstrated that this can be achieved through the controlled freezing process of a monomer/water emulsion, followed by cryopolymerization and room temperature thawing. As ice is used as a template, this method is environmentally friendly and capable of producing cellular plastics with various microstructures by harnessing the numerous morphologies of ice crystals. In particular, a cellular plastic with a radially aligned structure shows a negative Poisson’s ratio under compression. The rigid plastic shows a much higher energy dissipation capability compared to other materials with similar negative Poisson’s ratios. Additionally, the simplicity and scalability of this approach provides new possibilities for fabricating high-performance cellular plastics with well-defined porous structures and composition distributions.
研究领域:
材料科学
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仿生学
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PubMed
高影响因子
FOOD CONTROL
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2020
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IF 4.258
Xuefei Shao,Baocai Xu,Hui Zhou,Conggui Chen,Peijun Li
The mechanism of decreasing N- nitrosodimethylamine (NDMA) by Lactobacillus pentosus R3 isolated from Chinese dry sausage was assessed in a model system. The model system was devised using a DeMan-Rogosa and Sharp-ferrous sulfate broth supplement with NDMA or its precursors. The results showed that inoculating L. pentosus R3 could significantly decrease the content of NDMA ( P < 0.05). The NDMA precursors (dimethylamine and putrescine) were found to be decreased by L. pentosus R3 ( P < 0.05). Nitrite was degraded to nitrosonium cation by acidolysis, which may promote the formation of NDMA. Direct degradation of NDMA by L. pentosus R3 was also observed. The strain exhibited antioxidant activities , including Fe 2+ chelating activity, which may be responsible for inhibiting the formation reaction and decreasing the precursors of NDMA. Thus, L. pentosus R3 decreased the content of NDMA possibly by three ways: inhibition of the formation reaction, decrease in precursors (DMA and putrescine) and direct degradation. It is interesting to understand the mechanism of decreasing NDMA by L. pentosus R3 to improve the safety of fermented meat products .
研究领域:
食品科学
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微生物学
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高影响因子
International Journal of Polymer Science
·
2020
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IF 1.646
Shuxi Gao,Xiaoyong Hu,Lei Zhang,Yuliang Mai,Hao Pang,Yongqiang Dai,Bing Liao
One silsesquioxane-polythiophene hybrid copolymer, with combined star-like structure and intramolecular heterogeneity, was synthesized and sufficiently characterized via various methods, including FTIR, NMR, and SEC measurements. According to the exploration and characterization results, it was much more efficient at modifying SWNTs than its linear analogs in aqueous solution. The hydrophobic silsesquioxane core and PEDOT chains could locally anchor to the surface of the nanotubes, while the soluble flexible copolymer chains extended into the solution and rigid conjugated chains provided some - stacking effect to enhance adhesive force with the conjugated structure of the carbon nanotube, imparting steric stabilization to nanotube dispersion. The noncovalent interaction with SWNTs and solubility in aqueous solution improved the electrochemical characteristics of the modified-SWNT composite and availed for the preparation of a flexible and transparent electroactive film. Accordingly, this kind of silsesquioxane-polythiophene hybrid copolymer will be forwarded to apply to the assembling of flexible optoelectronic devices.
研究领域:
材料科学
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纳米技术
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电化学
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高影响因子
BIOMACROMOLECULES
·
2020
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IF 6.092
Shuyue Zhao,Wenjun Huang,Changrong Wang,Yaping Wang,YuFeng Zhang,Zhanpeng Ye,Jianhua Zhang,Liandong Deng,Anjie Dong
The amphiphilic cationic polymers that mimic antimicrobial peptides have received increasing attention due to their excellent antibacterial activity. However, the relationship between the structure of cationic polymers and its antibacterial effect remains unclear. In our current work, a series of PEG blocked amphiphilic cationic polymers composed of hydrophobic alkyl-modified and quaternary ammonium salt (QAS) moieties have been prepared. The structure–antibacterial activity relationship of these cationic polymers was investigated against E. coli and S. aureus, including PEGylation, random structure, molecular weights, and the content and lengths of the hydrophobic alkyl side chains. The results indicated that PEGylated random amphiphilic cationic copolymer (mPB35/T57) showed stronger antibacterial activity and better biocompatibility than the random copolymer without PEG (PB33/T56). Furthermore, mPB35/T57 with appropriate mole fraction of alkyl side chains (falkyl = 0.38), degree of polymerization (DP = 92), and four-carbon hydrophobic alkyl moieties was found to have the optimal structure that revealed the best antibacterial activities against both E. coli (MIC = 8 μg/mL, selectivity > 250) and S. aureus (MIC = 4 μg/mL, selectivity > 500). More importantly, mPB35/T57 could effectively eradicate E. coli biofilms by killing the bacteria embedded in the biofilms. Therefore, the structure of mPB35/T57 provided valuable information for improving the antibacterial activity of cationic polymers.
研究领域:
微生物学
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材料科学
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药理学
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PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2020
·
IF 3.862
Lei Wang,Xiaofeng Ma,Linlin Wu,Ye Sha,Bo Yu,Xiaoyu Lan,Yanlong Luo,Yijun Shi,Yan Wang,Zhenyang Luo
Fabrication strategies for photo-responsive ion gels have attracted attention owing to their precise spatial and temporal control with predetermined responses to light stimuli. In this work, a reversible light-driven method was introduced to devise photo-responsive ion gels by harnessing coumarin-based building blocks under 365 nm irradiation. A series of random copolymers composed of N, N -dimethylacrylamide (DMA) and 7-(2′-methacryloyloxyethoxy)–4-methylcoumarin (MAOEMC), namely P(DMA- r -MAOEMC), were synthesized through reversible addition-fragmentation chain transfer (RAFT) polymerization with sufficient molecular weight (≈100 kDa). The coumarin moieties in those polymers exhibited a reversible photo-induced dimerization and photocleavage behavior in 1-ethyl-3-methylimidazolium bis (trifluoromethylsufonyl) imide ([C 2 mim][NTf 2 ]). Those polymers - ionic liquid system at high polymer concentration (20 wt%) under suitable wavelength UV light irradiation led to sol–gel transition, which could be functionalized as photo-healable material and photo-controlled adhesion agents. Notably, the photo-controlled adhesiveness was reversible and can be mediated from 1.2 MPa to 0.2 MPa. This work opens new avenues to develop multifunctional ion gels using dynamic covalent bonds.
研究领域:
材料科学
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高分子化学
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高影响因子
LANGMUIR
·
2021
·
IF 3.882
Ya Liu,Li Wang,Hongsheng Lu,Zhiyu Huang
Hydrogels and organogels, as two crucial representatives of soft materials, have attracted immense interest. However, they develop independently along two parallel lines, and these gels with single networks have their inherent drawbacks. For example, hydrogels tend to freeze, and organogels are usually brittle. Herein, organogels were incorporated into a hydrogel matrix for the synthesis of organohydrogels GOHs through polymerization in Pickering emulsion. The rigid organogel domains contribute to enhancing the strength of organohydrogels. Besides this, the organogels derived from 12-HAS self-assembly behavior exhibit a gel–sol transition when the temperature reaches 70 °C, thus leading to a thermo-softening behavior in the GOHs. Due to the phase transition of organogel domains and the elastic hydrogel network, the resultant organohydrogels demonstrate high-strain shape-memory performance (over 1000%) which could help achieve full recovery in seconds. Consequently, GOHs are endowed with the potential of practical application in soft robots, wearable devices, and biological materials.
研究领域:
材料科学
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生物医学工程
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PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2020
·Vol. 26
·期 45
·10307-10313
·
IF 4.857
Chang-Qing Jing,Juan Wang,Hui-Fang Zhao,Wen-Xin Chu,Yun Yuan,Zhi Wang,Meng-Fei Han,Te Xu,Jian-Qiang Zhao,Xiao-Wu Lei
Graphical Shining white : With the aim of optimizing the broadband white-light emission performance of low-dimensional perovskites, isomorphic 2D perovskites [DMEDA]PbCl 4 and [DMPDA]PbCl 4 were structurally designed on the basis of homologous amine templates. The subtle regulation of organic cations leads to increased distortion of the 2D [PbCl 4 ] 2− layers and enhancement of the photoluminescence quantum efficiency from <1 to 4.9 %. DMEDA: dimethylethylenediamine, DMPDA: N , N -dimethyl-1,3-diaminopropane. Recently, 2D organic–inorganic hybrid lead halide perovskites have attracted intensive attention in solid-state luminescence fields such as single-component white-light emitters, and rational optimization of the photoluminescence (PL) performance through accurate structural-design strategies is still significant. Herein, by carefully choosing homologous aliphatic amines as templates, isotypical perovskites [DMEDA]PbCl 4 ( 1 , DMEDA= N , N -dimethylethylenediamine) and [DMPDA]PbCl 4 ( 2 , DMPDA= N , N -dimethyl-1,3-diaminopropane) having tunable and stable broadband bluish white emission properties were rationally designed. The subtle regulation of organic cations leads to a higher degree of distortion of the 2D [PbCl 4 ] 2− layers and enhanced photoluminescence quantum efficiencies (<1 % for 1 and 4.9 % for 2 ). The broadband light emissions could be ascribed to self-trapped excitons on the basis of structural characterization, time-resolved PL, temperature-dependent PL emission, and theoretical calculations. This work gives a new guidance to rationally optimize the PL properties of low-dimensional halide perovskites and affords a platform to probe the structure–property relationship.
研究领域:
材料科学
·
光学
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PubMed
高影响因子
危险品化学品经营许可证（带存储）