COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2023
·
IF 8.7
Junyu Lu,Haoruo Zhang,Mushan Yuan,Yunfei Gao,Mei Liang,Yang Chen,Huawei Zou
Without a reliable mechanical carrier, it is difficult to apply MA materials in realistic aerospace scenarios. Here, the broadband MA properties of RGO/melamine foam (RGO/MF) composites were prepared and optimized by hydrothermal chemical reduction method. The realization of broadband MA by RGO/MF is mainly achieved through the cooperative enhancement of RGO dispersion by the following two points: (1) three-dimensional (3D) meso -scale dispersion of RGO supplied by MF and (2) 3D microlayer separation of formed RGO provided by hydrothermal chemical reduction. For the first time, we successfully achieve complete filling of the RGO/MF into honeycomb. The RGO/MF honeycomb composites achieved almost 95.25 % EAB in the full frequency ranges from 2 to 18 GHz, where the MA performance of the composites originated from the electric-field loss of the RGO/MFs. Such RGO/MF honeycomb composites shows a promising application prospect and guidance in the field of aerospace stealth.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 11
·50038
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IF 2.52
Linjiong Zhang,Lianfang Feng,Xueping Gu,Cailiang Zhang
Oil spills and organic chemical leakage have caused serious environmental problems, calling for highly effective adsorbents at low cost. Superelastic and hydrophobic-oleophilic modified melamine foams with ultralow amounts of well-dispersed graphene were prepared via dip-coating. The composite foams showed high selectivity for adsorbing various organic chemicals from water and could be regenerated easily. Moreover, excellent adsorption capacity ranging from 80 to 170 times its own weight was found depending on the density of organic chemicals. These coated foams show great potential for continuous oil/water separation and oil fume removal.
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LANGMUIR
·
2026
·
IF 4.4
Wenhao Bao,Bizhi Lv,Linqiong Xu,Yaoxin Shao,Jinpeng Wang,Yongqing Zhao,Xinsheng Dou
A macroscopic P-ZIF-8/PDA/MF adsorbent was fabricated by substituting conventional zinc precursors with layered porous zinc oxide (P-ZnO) on polydopamine (PDA)-functionalized melamine foam (MF). The composite exhibited exceptional adsorption capacity for chlortetracycline hydrochloride from wastewater, with a Langmuir-modeled maximum of 1320 mg/g at pH 6. Systematic evaluation of environmental parameters─including pH gradients, ionic strength variations, and competitive ion interference─revealed robust performance under various aqueous conditions. In addition, FT-IR and XPS analyses were performed to characterize P-ZIF-8/PDA/MF both prior to adsorption and following the adsorption process in order to clarify its adsorption behavior. The analysis indicates that the uptake by P-ZIF-8/PDA/MF mainly proceeds through monolayer chemisorption, which results from the combined contributions of hydrogen-bond interactions, π–π stacking, and pH-dependent electrostatic attraction.
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PubMed
高影响因子
Science China-Technological Sciences
·
2026
·Vol. 69
·期 11
·2120106
·
IF 5.1
Li Hongyang,Guo Zelin,Liu Zhan,Nie Changda,Liu Xinjian,Rao Zhonghao
Leveraging the advantages of high heat storage density and stable phase transition temperature, phase change materials (PCMs) have become one of the primary approaches to achieving continuous supply of renewable energy. Due to the risk of PCM leakage and poor cyclic stability, the utilization of PCMs in industry is severely limited. Generally, porous materials are used for PCM encapsulation to prevent leakage. However, due to the poor interface compatibility between porous materials and PCMs, the composite materials suffer from incomplete PCM injection and low enthalpy value. This study used polydopamine (PDA)-modified melamine foam (MF) to improve the encapsulation of polyethylene glycol (PEG) to reveal the effect of molecular modification on the thermal performance of the composite PCMs. The results indicate that with increasing PDA modification time, the adsorption capacity of MF for PEG gradually improves, the leakage of MF-based PCMs is alleviated, and the enthalpy value increases. Furthermore, by altering the molecular weight of PEG, the strengthening effect of PDA molecular modification on the heat storage capacity of MF-based PCMs is verified, and this effect is universal for polyethylene glycol materials. This study reveals that molecular modification is useful in improving the interface compatibility and heat storage capacity of the porous-based phase change composites. It fills the gap in the analysis of the influence pattern and mechanism of molecular modification on the change of phase transition enthalpy.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 15
·44266-44275
·
IF 5.8
Yu Xiaoxiao,Wei Yicui,Qi Wei,Wang Mengfan
Water-insoluble organic pollutants in environment, such as sea oil spill, industrial reagents, and the abused organic pesticides, bring great risks to global water systems, which thus requires effective approaches for organic pollutant elimination. In this study, we report a catalytic metal–organic framework (MOF)-melamine foam (MF) composite material (DDT-UiO-66-NH 2 @MF) showing excellent oil–water separation performance and enzyme-like degradation ability toward organophosphorus pesticides. The fabrication of DDT-UiO-66-NH 2 @MF is based on the immobilization of a MOF-derived nanozyme (UiO-66-NH 2 ) on MF sponge, and followed by the hydrophobic modification of UiO-66-NH 2 by 1-dodecanethiol (DDT). The obtained DDT-UiO-66-NH 2 @MF thus displayed superhydrophobic/superhydrophilic property with a high water contact angle (WCA = 144.6°) and specific adsorption capacity toward various oils/organic solvents (62.2–119.8 g/g), which leads to a continuous oil–water separation on a simple device. In the meanwhile, owing to the enzyme-like property of UiO-66-NH 2 , DDT-UiO-66-NH 2 @MF also displayed good ability to hydrolyze paraoxon under mild conditions, which facilitates the elimination of toxic pesticide residuals in water systems. This work provides a simple, efficient, and green approach for the separation and treatment of water-insoluble organic pollutants, as well as expands the use of MOFs-MF sponge composite materials in environmental sustainability.
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高影响因子
COMPOSITES COMMUNICATIONS
·
2021
·
IF 6.617
Jiamei Luo,Xueqin Yang,Rogers Tusiime,Haonan Chen,Yong Liu,Hui Zhang,Jianyong Yu
High heat conduction epoxy resins with a more than twofold increase in thermal conductivity at a low filler addition were fabricated by construction of three-dimensional synergistic thermal conductive networks at macro and micro scales. Shortly, boron nitride nanoplates/carbon nanotubes (BNs/CNT) were embedded into each other and assembled on 3D melamine foam skeletons via electrostatic interaction , prior to addition of epoxy resin. The introduced melamine foam has the characteristics of strong adsorption and ultra-high porosity, which are convenient for BNs/CNT to establish multiscale synergistic heat conduction channels at a microscopic scale. The morphological characteristics of M(BNs/CNT)x were revealed by FESEM and elemental mapping images pointed to continuous BNs/CNT thermal paths forming along the 3D skeleton of the melamine foam within epoxy resin. Consequently, the thermal conductivity of the epoxy resin improved from 0.21 W m −1 K −1 to 0.43 W m −1 K −1 at a rather low filler content of BNs/CNT (about 0.43 wt%, ∼1/1). The epoxy resin further possessed a relatively low dielectric constant (about 7.38 at frequency = 10 7 Hz) as suggested by dielectric characteristic analysis. This presents promising application prospects in the field of electrical insulation materials.
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Environmental Science-Water Research & Technology
·
2024
·
IF 3.5
Haoxiang Yan,Jianzheng Zhen,Yuyuan Yao
Developing a facile preparation method to construct separable and recyclable Fenton-like catalysts holds great significance in the field of environmental remediation. Herein, a rapid dopamine (DA) polymerization strategy to modify melamine foam (MF) was proposed for the construction of bulk foam catalytic materials, which was further utilized for peroxymonosulfate (PMS) activation to degrade organic pollutants. Taking advantage of the chelation between dopamine's catechol group and Fe3+, as well as the oxidative environment provided by H2O2, DA could encapsulate and polymerize on the surface of MF within 2 h to obtain the MF@Fe@PDA catalyst. Detailed experimental results demonstrated that MF@Fe@PDA could efficiently activate PMS to achieve almost 100% removal of bisphenol A (BPA) in 20 min, and the corresponding turnover frequency (TOF) value was one order of magnitude higher than that of the homogeneous (Fe2+, Fe3+) and nanoparticle (Fe0) catalysts. The high activity of the MF@Fe@PDA/PMS system stemmed from the Fe sites and carbonyl group (CO), which could induce the activation of PMS for the rapid generation of singlet oxygen (1O2), sulfate radical (SO4˙−) and hydroxyl radicals (˙OH). Meanwhile, the coexisting bicarbonate ions (HCO3−) in the MF@Fe@PDA/PMS system could enhance the generation of 1O2, thereby accelerating the degradation of BPA. Moreover, a flow-through system assisted by the bulk MF@Fe@PDA catalyst was constructed for organic pollutant degradation. Overall, these findings may open up new possibilities for developing highly efficient catalysts for wastewater remediation.
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DESALINATION
·
2024
·
IF 8.3
Yichi Liu,Yi Liu,Wenjing Chen,Xiaowu Hu,Yinshui He,Yan Ma,Yuqiong Xie,Wenxing Luo,Lixiang Luo,Lan Jiang,Xiongxin Jiang,Qinglin Li
CdS has been shown to be an excellent photon trap with strong absorption of light at visible and near-infrared wavelengths. The use of CdS for phase change material (PCM) modification can significantly improve its photothermal conversion performance. However, due to the unique energy band structure of CdS, the difficulty in electron conduction leads to poor thermal conductivity . This problem can be improved by introducing high thermal conductivity nanometals for modification, however, the effective combination of CdS and nanometals has been challenging. In this study, a new preparation strategy is demonstrated, in which Ag nanoparticles (NPs) with similar lattice parameters and crystalline coordination to CdS is first introduced on the surface of carbonized melamine foam (CMF), followed by the introduction of CdS NPs. This similar structure helps to form a better interfacial bond between CdS and Ag. The resulting stabilized structure enables the composite phase change material (CPCM) to achieve 96.1 % PEG loading with an ultra-high photothermal conversion efficiency of 94.6 %, thermal conductivity of 0.61 W/m∙K, and excellent antimicrobial activity. This study provides valuable guidance for the engineering design of CPCM with high photothermal conversion performance and suggests its practical application value in seawater evaporation and thermal management of medical devices .
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高影响因子
JOURNAL OF POROUS MATERIALS
·
2023
·Vol. 30
·期 6
·1937-1951
·
IF 2.6
Liang Jiaming,Lin Shaohui,Feng Xianshe,Pan Qinmin
Frequent oil spills and oily wastewater discharge have caused serious damage to the ecological environment, which make it urgent to address these challenges. Herein, we report an effective strategy and low-cost method to transform commercially available melamine foams into superhydrophobic/superoleophilic absorbents, which has a high separation ability for both oil-water mixtures and emulsions. Our approach involves the co-deposition of tannic acid and 3-aminopropyltriethoxysilane on the foam surface to form a hierarchical structure, followed by the covalent grafting of palmitic acid with low surface energy onto the foam backbones via acylation. The resulting foam maintained a cross-linked porous structure with a water contact angle of 153° and a sliding angle of 7°, exhibiting a high degree of water repellency. Absorption experiments with chloroform and engine oil showed that the foam has high absorption capacity, reaching 99.2 and 172.8 times its own weight, respectively, and the foam still retains excellent elasticity after 1000 compression cycles. In addition, the superhydrophobic foam has a high demulsification ability to oil-in-water emulsions by repeated compression and violent stirring, and its separation ability for toluene-in-water emulsions was up to 99.25%. Based on these results, the superhydrophobic foam has significant potential for large-scale oil spill cleanup and wastewater purification.
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Materials Today Sustainability
·
2025
·
IF 7.9
Bing Liu,Qiushi Sun,Meng Sun,Shuang Liu,Hao Wu
As the need for enhanced energy efficiency and the use of renewable energy increases, polyethylene glycol (PEG), a crucial element in phase change materials (PCMs), has gained considerable focus in the areas of temperature control and energy storage. Nevertheless, PEG faces leakage and undesired light absorption problems in practical applications. In this study, melamine foam (MF) is utilized as an encapsulation material in an attempt to tackle the leakage problem. ZIF-67 is incorporated onto MF by in situ growth, followed by high-temperature carbonization to prepare a hierarchical porous carbon, which further enhances the absorbance of phase change composite (PCC). The crystallization of the prepared PCCs is in the range of 157.9-170.3 J/g. The photo-thermal conversion rate of PCC is 92.65%, and the thermal conductivity is 0.38 W/(m∙K). In conclusion, the problems of PEG leakage and low light absorption were solved by carbonized porous encapsulation technique and in situ growth of ZIF-67, which enhanced the solar-thermal energy conversion of storage and PCCs.
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高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Jinjie Xu,Yuehong Pang,Zhuying Yan,Xiaofang Shen
Glyphosate, a widely used herbicide, is prone to residue in the environment that may cause harm to humans. In this work, titanium ion-modified melamine foams (MF/PDA/Ti 4+ ) were prepared as sorbents to achieve rapid extraction of glyphosate by pipette-tip solid-phase extraction (PTSPE). The MF/PDA/Ti 4+ was characterized by SEM, EDS, XPS, and TGA, and its adsorption properties were evaluated by adsorption kinetics and isotherm experiments. The porous structure and good mechanical properties of MF made the MF/PDA/Ti 4+ fill into the pipette-tip easily and could achieve low back pressure. The developed PTSPE method showcased short extraction time (<2 min) for glyphosate and the limits of detection (LOD, 3σ/k) was 4.9 μg/L. It was applied in aqueous samples (tap water, lake water, tea drink, and orange juice) with recoveries ranging from 82.8 % to 108.2 % and the relative standard deviation (RSD, n = 3) was less than 7.7 %, demonstrating broad perspectives on the extraction of glyphosate from the aquatic and terrestrial environment.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Heng Zhao,Xiaolin Ma,Mingjie Lu,Fengting He,Feifei Lin,Yang Zhang,Jinqiang Zhang,Pei Dong,Chaocheng Zhao,Hongqi Sun
In this work, a melamine foam derived nitrogen (N) and boron (B) co-doped metal-free electrode was prepared by accessible method and applied in heterogeneous electro-Fenton (EF) system. Overcoming the metal ion leaching and harsh operating conditions of most transition metal electrodes, the prepared metal-free electrode (NB/CF 40 ) possessed an excellent EF performance for degradation of metronidazole (MTZ) in a wide range of pH (3–11), maintaining great reusability even after ten runs with higher mineralized current efficiency (MCE) and lower energy consumption (EC). Significantly, the NB/CF 40 has excellent decontamination performance for actual wastewater containing MTZ analyzed by quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS) and three-dimensional excitation-emission matrix fluorescence spectra (3D EEMs). According to experimental results, characterization analysis and density functional theory (DFT) calculations, EF reaction mechanism by NB/CF 40 cathode was proposed, in which the active sites of B C C C-graphitic N and B C C C-pyridinic N configurations contributed to the improvement of EF performance by affecting the charge density of nearby carbon framework, adsorption of O 2 , and desorption of *OOH. This work offers a new idea for the remediation of wastewater by the efficient metal-free EF system in a wide pH range.
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危险品化学品经营许可证（带存储）