Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Tingli Li,Youcai Kang,Xiaomei Liu,Cailing Yang,Li Li,Panpan Liu,Ziqiang Lei
The northwest of China is experiencing a severe water deficit and salinization of the land. Pentaerythritol diacrylate (PEDA) was developed as a new cross-linking agent, and Polyacrylic acid/ Pentaerythritol diacrylate (PAA/PEDA) was created by free radical polymerization utilizing acrylic acid as the monomer , to enhance the water retention and salt isolation qualities of soil. Infrared spectroscopy , scanning electron microscopy, and thermogravimetric analysis were used to determine the structure, morphology, and thermal stability of the improved SPA. Under ideal synthesis circumstances, the water absorbency of SPA in deionized water , tap water , and NaCl solution (0.9 wt%) was 501 g/g, 150 g/g, and 58 g/g, respectively. The water retention, reswelling, fertilizer retentio, anti-leakage, and salt isolation properties of PAA/PEDA at different temperatures under optimal conditions were investigated. The results showed that the PAA/PEDA material had the best water retention at room temperature; the addition of 0.8% PAA/PEDA material reduced the water infiltration rate by 86% compared with the blank control group; The addition of 0.4% PAA/PEDA material showed a lower salinity trend than the control, and the PAA/PEDA material had a hindering effect on the upward movement of salts in the soil.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2019
·Vol. 44
·期 1
·448-459
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IF 3.343
Nan Zhang,Yaoge Jing,Yanlin Song,Yanxia Du,Yanping Yuan
Summary Solid-solid phase change materials (SSPCMs) used in thermal energy storage (TES) system attract much attention in recent days. Here, graphene nanoplatelets (GnPs) were introduced into pentaglycerine (PG) with mass ratios of 1 wt%, 2 wt%, and 4 wt% to obtain PG/GnPs PCMs. The structure and thermal property of PG/GnPs PCMs were characterized by SEM, XPS, FT-IR, POM, DSC, thermal conductivity tester, and heat transfer performance test system. The effect of GnPs on the crystallization kinetic of PG was investigated by isoconversional method. The results indicated that PG and GnPs were uniformly mixed together by physical reaction. GnPs reduced the subcooling and enhanced the thermal conductivity of the PG/GnPs. The heat transfer rate of PG/GnPs was improved during to the high thermal conductivity. Crystallization kinetic results presented that the activation energy increases with the GnP content. In summary, GnPs improved the thermal behaviors of PG.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 4
·1524
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IF 3.748
Yu Gao,Hongwei Zhao,Guang Chen,Qi Peng,Yingying Liu,Fei Song,Qingquan Liu
In this work, a crosslinked polycarboxylate superplasticizer (crosslinked-PC) was synthesized via the free radical polymerization reaction. Pentaerythritol tetraacrylate (PETA) was used as the crosslinked agent. A comparative comb-like polycarboxylate superplasticizer (comb-like-PC) was prepared under the same reaction conditions. The dispersion retention capacity, dispersion capability, hydration characteristics of the cement paste and setting time were investigated in detail. At the dosage of 0.6% bwoc, the fluidity of the cement/crosslinked-PC paste was about 340 mm, which was 40~50 mm larger than the cement/comb-like-PC paste. The dispersion retention capacity of the cement/crosslinked-PC paste was observed to be much superior due to higher adsorbed amounts on the cement particles. Moreover, the cement/crosslinked-PC paste exhibited the initial and final setting durations of 196 and 356 min, respectively, which indicated an enhancement of 18 and 68 min compared to the cement/comb-like paste. The crosslinked copolymers exhibit a stronger retardation effect than the comb-like copolymers due to their enhanced adsorbed amounts and stronger steric hindrance effect. This is further illustrated by the characterization of the hydration process and hydration products. It can be concluded that it is feasible to improve the dispersive capacity and the dispersion retention capacity of PC by changing the molecule structure from comb-like to slightly crosslinked.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
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IF 9.2
Shuqing Zhang,Zhidong Liu,Ruxiang Liu,Li Du,Li Zheng,Zhiyuan Liu,Kaiming Li,Meng-Chang Lin,Yinghui Bian,Mian Cai,Huiping Du
Rechargeable aluminum batteries are of interest owing to the nonflammability of Al metal anode and the ionic liquid electrolytes together with the low cost and high capacity of Al metal anode. However, the ionic liquid electrolytes are also moisture sensitive and highly corrosive, bringing about irreversible activity loss, undesired gas production and destructive leakage corrosion, which thus hinder the practical application of rechargeable aluminum batteries . Herein, a gel polymer electrolyte is designed via in-situ cross-linking polymerization of ethyl acrylate (EA) monomer and pentaerythritol acrylate (PETEA) crosslinker in high molar ratio of AlCl 3 /1-ethyl-3-methylimidazolium chloride (EMIC) ionic liquid. This gel polymer electrolyte exhibits an ionic conductivity of 1.46 × 10 −3 S cm −1 , a wide electrochemical window up to 3.0 V (vs. Al), alleviated moisture sensitivity and appreciable interfacial stability at room temperature . The assembled solid-state Al//graphite batteries with the gel polymer electrolyte deliver stable capacities of ∼90 mAh g −1 for 1000 cycles at the current density of 100 mA g −1 at both ambient temperature and −10 °C. Even with high-loading graphite cathode of 11 mg cm −2 , capacities of ∼60 mAh g −1 can still be obtained for 300 cycles. This work provides a promising strategy for developing reliable and flexible rechargeable aluminum batteries.
研究领域:
材料科学
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电化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yanli Qi,Jiali Huang,Shaopan Qin,Maoyin Yan,Xiaobing Huang,Yurong Ren
Problems occur frequently during the application of traditional liquid electrolyte batteries, such as fluid leakage and low energy density. As a product of liquid electrolyte transition to solid electrolyte, gel polymer electrolyte has its own advantages for achieving high conductivity and good thermal stability. In this study, pentaerythritol tetracrylate (PETEA) was used as the precursor to prepare polymer-based materials with the assistance of azobis(isobutyronitrile) (AIBN) as the initiator. Because fluorine is beneficial to improving the migration efficiency of Li+ and the electrochemical performance of the gel polymer electrolyte, dodecafluoroheptyl methacrylate (DFHMA) is introduced to the PETEA-based gel polymer electrolyte (GPE) system. The DFHMA-introduced GPE shows better electrochemical performance, battery cycle performance, conductivity, and lithium-ion migration number compared with the pristine PETEA-based GPE. In particular, the DFHMA-introduced GPE exhibits the best performance because the molar ratio of PETEA to DFHMA is 5:1. Herein, the electrochemical window is 4.6 V, the ionic conductivity reaches 1.207 mS cm–1, and the number of lithium-ion migrations reaches the value of 0.663. Because the electric current density is 2 C, the specific capacity of LiNi0.5Co0.2Mn0.3O2 (NCM523)/GPE/Li reaches 143.1 mAh g–1 after 100 cycles.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
Sustainable Materials and Technologies
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2026
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IF 9.2
Denglun Chen,Lulu Cao,Meiqi Han,Junyin Li,Zhaohui Tong,Chunyan Tang,Yuechao Yang,Shugang Zhang
The development of bio-based controlled-release coating materials for controlled-release fertilizers has become a key research focus in sustainable agriculture, driven by their renewability, cost-effectiveness, and environmental benefits in contrast to conventional petrochemical counterparts, which are often non-renewable, expensive, and slow to degrade. However, bio-based materials utilized for controlled-release coatings, such as vegetable oil and lignin, usually contain hydrophilic groups, which lead to poor hydrophobicity. Furthermore, the coating shell has poor toughness and is prone to rupture. These deficiencies ultimately result in suboptimal nutrient release synchronization with crop growth cycles. In this study, a hydrophobic and high-toughness bio-based polymer coating was prepared by combining an elastomer as a modifier with the bio-based film materials. The bio-based polymer coating modified with 20% elastomer (derived from pentaethylene glycol, castor oil, and isophorone diisocyanate) exhibits high cross-linking density (high gel content), which significantly enhances the coating's mechanical properties and barrier function, thereby successfully mitigating the limitations on its release performance. Specifically, the ultimate tensile strength increases from 1.87 MPa to 14.09 MPa, the elongation at break increases from 6.06% to 15.22%, the water contact angle rises from 111.86° to 126.09°, and the controlled-release period extends from 98 days to 140 days. This study presents a new approach for incorporating the elastomer to enhance bio-based controlled-release fertilizer coating materials. In the long run, this approach is expected to offer technical insights for facilitating resource utilization and the development of sustainable agriculture.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2026
·
IF 10.6
Sirui Liang,Yalang Zhang,Ying Zhang,Wenzhen Liao,Qi He
Advanced food contact materials (FCMs) face critical safety challenges from non-intentionally added substances (NIAS) whose origins and migration remain poorly understood. Here we establish an integrated suspect screening and risk prioritization framework to unravel NIAS formation, migration, and toxicological significance in two polyether ether ketone (PEEK)-based FCM systems. Using UPLC-HRMS, we identified 43 potential migrants in PEEK pellets/film and 21 in TPU pellets/SPEEK-TPU blend film. Comparative analysis reveals that the finished films contain a substantially broader and more diverse set of NIAS than the raw materials, including ethoxylated oligomers, caprolactam oligomers, and quaternary ammonium degradation products that are not detected in the raw materials. Migration experiments confirm the release of 4 compounds from PEEK film and 6 from the blend film into food simulants. A risk-ranking model applied to methanol extracts serves as a hazard-based prioritization tool, whereas the threshold of toxicological concern (TTC) comparison is based on actual migration. Notably, tetrabutylammonium from the blend film shows a semi-quantified exposure that exceeds the TTC by 1.85-fold under acidic conditions in the migration test, flagging it as a priority compound for further confirmatory analysis. A risk-ranking model further classifies five substances as Risk I (e.g., sulfonated surfactants, benzophenone derivatives). Our findings demonstrate that NIAS originating from finished films contribute substantially to the migration risk profile of advanced FCMs, providing a pragmatic framework for next-generation food packaging safety evaluation.
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DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Jiaoyang Chen,Dong Wang,Jiajun Fu
Stiff yet room-temperature self-healing polymers are designed using molecularly engineered hydrogen bonds (H-bonds). However, they often suffer from high brittleness, moisture sensitivity, and limited functionality. To overcome these challenges, high-performance biomimetic nanocomposites inspired by inverse nacre structures are developed. A layered boron nitride nanosheet (BNNSs) skeleton is embedded within a previously synthesized room-temperature self-healing glassy polyurethane network, leveraging a solvent exchange-induced self-assembly strategy. This approach resolved the problem of BNNSs agglomeration and reconstructed robust yet dynamic noncovalent interfacial interactions, maximizing the reinforcing and toughening effects of BNNSs. Consequently, the nanocomposite exhibited significant mechanical enhancements, including 6.6-fold, 14.4-fold, 490-fold, and 35.7-fold increases in flexural modulus, strength, toughness, and fracture toughness, respectively, achieving a balance between stiffness and toughness. Furthermore, the nanocomposite retained room-temperature self-healing properties through the secondary relaxation of H-bonds. The impermeability of BNNSs effectively shielded H-bonds from moisture, fundamentally altering the hygroscopic nature of self-healing glassy polyurethanes. Additionally, the highly oriented and interconnected BNNSs skeleton endowed the nanocomposite with an in-plane thermal conductivity of up to 11.54 W m −1 K −1 , making it a promising candidate for next-generation high-performance intelligent thermal interface materials.
研究领域:
材料科学
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纳米技术
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高分子科学
·
机械工程
·
热管理
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产品关联
DOI
PubMed
高影响因子
Oncology Letters
·
2021
·Vol. 21
·期 3
·1-1
·
IF 2.967
Jiaxue Hao,Xufen Dai,Juan Gao,Yuexuan Li,Zhaoling Hou,Zhongman Chang,Yuxin Wang
Colorectal cancer (CRC) is the third most common cancer worldwide, with high incidence and mortality rates. Conventional therapies, including surgery, chemotherapy and radiation, are extensively used for the treatment of CRC. However, patients present with adverse effects, such as toxicity, hepatic injury and drug resistance. Thus, there is an urgent requirement to identify effective and safe therapy for CRC. Curcumin (CUR), a polyphenol substrate extracted from the rhizome of Curcuma longa, has been extensively studied for the treatment of CRC due to its high efficacy and fewer side effects. Previous studies have reported that several signaling pathways, such as NF‑κB, Wnt/β‑catenin, are involved in the antitumor effects of CUR in vitro. However, the effect and mechanisms in vivo are not yet fully understood. The present study aimed to determine the molecular mechanism of colorectal cancer in vivo. Reverse transcription‑quantitative PCR, western blot and immunohistochemistry analyses were performed to determine the underlying molecular mechanism of curcumin's anti‑cancer effect in azoxymethane‑dextran sodium sulfate induced colorectal cancer. The results of the present study demonstrated that CUR suppressed tumorigenesis in AOM‑DSS induced CRC in mice, and anticancer effects were exerted by suppressing the expression of pro‑inflammatory cytokines, and downregulating Axin2 in the Wnt/β‑catenin signaling pathway. Taken together, these results exhibit the potential in vivo mechanisms of the anticancer effects of CUR, and highlight Axin2 as a potential therapeutic target for CRC.
研究领域:
肿瘤学
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分子生物学
·
药理学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
·
2020
·Vol. 31
·期 10
·2120-2128
·
IF 1.399
Ge Dandan,Gao Ying,Cao Yunxin,Dai Enrui,Yuan Lin
A vortex-assisted liquid-liquid microextraction method combined with high performance liquid chromatography-diode array detector has been developed for the determination of parabens in foods, cosmetics and pharmaceutical products. In this work, polymeric deep eutectic solvents composed of DL-menthol and polyethylene glycol with three different light grades were prepared successfully for the first time and used as extraction solvents. The influencing parameters on the extraction efficiency including type of extraction solvent, salt addition, composition of deep eutectic solvent, volume of extraction solvent, extraction time and solution pH were evaluated. Under the optimized conditions, using DL-menthol and polyethylene glycol 400 at a molar ratio of 1:1 as the extraction solvent, the method exhibited good linearity with linear coefficients greater than 0.9995. Limits of detection and limits of quantification were in the range of 0.3-2 ng mL-1 and 1-5 ng mL-1, respectively. The proposed method was successfully applied to determine four parabens in seven commercial products. The proposed method is simple, green and efficient, and could be applied to determine parabens in complex matrices.
研究领域:
分析化学
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环境科学
·
食品科学
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产品关联
DOI
高影响因子
MACROMOLECULES
·
2021
·
IF 5.985
Ke Wang,Qi Liu,Ganghui Lu,Yi Zhang,Yuanhong Zhou,Siqi Chen,Qian Ma,Guiyan Liu,Yongfei Zeng
A novel acid-labile temperature-responsive homopolymer of poly(2-(2-(2-(2-((tetrahydrofuran-2-yl)oxy)ethoxy)ethoxy)ethoxy) ethyl methacrylate) (PTFEO4MA) combining the oligo ethylene glycol (OEG) moiety and acetal group was prepared by reversible addition–fragmentation chain transfer (RAFT) polymerization. PTFEO4MA exhibited a lower critical solution temperature (LCST) of 32 °C in aqueous solution and a tunable upper critical solution temperature (UCST) in different alcohol solvents. Its LCST was firmly correlative with the length of the OEG moiety and the carbon number in the acetal group; the parameters affecting thermoresponsive phase transition of PTFEO4MA including the polymerization degree, polymer concentration, different sodium salts, urea, and solvents were also studied. The phase transition mechanism of PTFEO4MA was explained by the temperature-variable 1H NMR analysis. Furthermore, PTFEO4MA is neutral but sensitive to acids; by adjusting the pH of the solution, it was found that its LCST disappeared under acidic conditions, while it remained unchanged under alkaline conditions. Finally, a diblock copolymer of poly(methoxy tetraethylene glycol methacrylate-block-2-(2-(2-(2-((tetrahydrofuran-2-yl)oxy)ethoxy)ethoxy)ethoxy) ethyl methacrylate) (PMEO4MA-b-PTFEO4MA) was prepared, and its temperature-/acid-induced phase transition and micellization behavior were investigated. The synthesized acid-labile temperature-responsive homopolymers and copolymer not only provide new ideas for the design of multistimuli-responsive polymers but also have potential applications in biomedicine and self-assembly due to their unique properties.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
PURE AND APPLIED CHEMISTRY
·
2020
·Vol. 92
·期 10
·1683-1694
·
IF 1.919
Di Duan,Baogen Su,Zongbi Bao,Qiwei Yang,Yiwen Yang,Qilong Ren
Various toxic metal ions were successfully removed from solid matrix into supercritical CO 2 (scCO 2 ) by open-chain crown ether bridged diphosphates at 313.15 K and 20 MPa, these diphosphates with different ester side chains and different length of ethylene oxide bridge group are highly soluble in supercritical CO 2 . The extraction efficiency ( E %) of heavy metals is between 55 and 89%. Mulliken charge distribution of ligand’s P=O coordination group was calculated to indicate the stability of metal complex. The ligand structure effects and the rationale for different selectivity were discussed. In addition, binding property of these diphosphates towards the alkaline earth metals was further studied following the same extraction procedures. Alkaline earth metal ions Ca 2+ , Sr 2+ and Ba 2+ were extracted with E % at 49–74%, 50–73% and 16–64%, respectively. DFT calculations were performed to investigate the interaction energy of the complexes and the correlation with the E % was discussed.
研究领域:
化学
·
环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）