RSC Advances
·
2025
·Vol. 15
·期 14
·10522-10531
·
IF 4.6
Yong-Man Jang,Chol-Jin Kim,Ju-Yong Kim,Dae-Hyok Mun,Chol-Jun Yu
Phosphorus-nitrogen containing polymers have been attracting considerable interest as potential flame retardants (FR) for cotton fabrics. In this work, we report an experimental-theoretical joint study on flame retardancy of cotton fibres treated with ammonium ethylenediamine tetramethylenephosphonate (AEDTMP) as FR and trimethylol melamine (TMM) as binder. Through material characterization and FR test, we find that the cotton fabric samples treated with 5% AEDTMP and 5% TMM solutions exhibit better flame retardancy and durability than those with 25% AEDTMP solution by forming multilayer coatings on the fabrics. Our calculations within the density functional theory framework reveal that the P–O–C and C–O–C bonds are newly formed by reactions between the AEDTMP FR and TMM binder, and the multilayer coating enhances such binding reactions. Our work highlights that the multilayer coating with AEDTMP of lower density is superior for flame retardancy and durability of treated cotton.
研究领域:
材料科学
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纺织工程
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计算化学
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产品关联
DOI
PubMed
高影响因子
PETROLEUM CHEMISTRY
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2025
·
IF 1.1
Chen Qiang,Zhou Shu-sheng,Gong Xing-guang
High-performance filtration reducers for saturated brine drilling fluids present a novel alternative for drilling anhydrite and mudstone formations, ensuring operational safety and cost efficiency. Conventional filtration reducers are often limited by poor biotoxicity, necessitating the development of environmentally friendly alternatives. In this study, a novel melamine resin-based filtration reducer (MHAN) has been synthesized, exhibiting exceptional thermal stability (up to 302°C). The addition of 3.0 wt % MHAN has reduced the filtration volume of a saturated brine bentonite-based drilling fluid from 162.2 to 8.2 mL and decreased the filter cake thickness from 3.2 to 0.8 mm demonstrating an excellent filtration control. After aging at 200°C, the saturated brine drilling fluid system containing 5.0 wt % MHAN with a density of 2.3 g/cm 3 maintains stable rheology and filtration control performance. Notably, MHAN is sulfur-free and exhibits high environmental compatibility, with an LC 50 value of 78,500 mg/L. This eco-friendly melamine resin effectively controls filtration loss in saturated brine drilling fluids, supporting sustainable development of oil and gas resources.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Kun Gao,Zhongyan Gong,Xinya Chen,Yulong Zhang,Haonan Chen,Lu Jiang,Chengcheng Zhu,Miao Ji,Yaning Liu,Yingying Cai,Gongqiang Li,Gang Lu
Electrochemical reduction of carbon dioxide (CO2RR) is a promising strategy for mitigating global warming and producing value-added products simultaneously. Molecular catalysts, such as cobalt phthalocyanine (CoPc), are known to be effective in converting carbon dioxide (CO2) to carbon monoxide (CO). However, it is still challenging to improve the reaction rate and selectivity of this conversion. Herein, we report a simple and effective coadsorption strategy to promote the reaction rate and selectivity of CoPc-catalyzed CO2RR to CO by coadsorbing melamine molecules together with CoPc onto the surface of carbon nanotubes (CNTs). The coadsorption of melamine led to an increase in the output current density for 2.6-fold at an overpotential of −1.23 V vs Ag|AgCl. Moreover, the Faraday efficiency (FE) toward CO increased to 92% in an H-type cell, in contrast to the FE of 85% in the absence of melamine coadsorption. The FE toward CO further improved to 99% in a flow cell system. It was revealed that the coadsorption of melamine could modulate the surface adsorption of the *CO intermediates and decrease the energy barrier of CO2 reduction to CO. More importantly, only a solution-based process was employed in the whole procedure and no organic synthesis was involved, making our method highly simple, convenient, and environment friendly. This work paves an effective way for modulating the activity and selectivity of molecular catalysts in the CO2RR.
研究领域:
化学
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环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
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2025
·
IF 6.3
Ya’nan Zhao,Long Yu,Jiarong Zhang,Tianran Zhao,Yi’na Yang,Chunna Yu,Chang Zhao,Guangjian Xing
The utilization of solar-driven seawater evaporation technology has proven effective for seawater desalination. This study focuses on developing Ta 4 C 3 T X /melamine sponges through a straightforward dipping-drying procedure. The porous melamine sponges, loaded with Ta 4 C 3 T X MXene within their framework, display remarkable elasticity, amphiphilicity, sunlight absorption capacity, and thermal stability due to the synergistic effects of the MXene and the sponge matrix. The Ta 4 C 3 T X /melamine sponges demonstrate superior photothermal conversion performance under sunlight irradiation. Under 1 sun, the sponges recorded an evaporation rate of 1.33 kg∙m −2 h −1 and a conversion efficiency of 83.79 %. Furthermore, outdoor assessments corroborated the sponges' impressive efficacy in seawater evaporation across diverse weather conditions. Significantly, these sponges exhibited self-desalination capabilities and long-term stability throughout the seawater evaporation process. Notably, the photothermal efficiency of the sponges is enhanced in proportion to the content of Ta 4 C 3 T X . Beyond seawater evaporation, these sponges have also demonstrated their effectiveness in applications such as deicing and photothermal therapy applications. Additionally, the sponges demonstrated a capacity to absorb oils and organic solvents, with an absorption capacity ranging between 19 and 55 g∙g −1 . Given their affordability, straightforward fabrication process, sustainability, and effective photothermal performance, the Ta 4 C 3 T X /melamine sponges present new opportunities for the development of multifunctional materials aimed at desalination and pollution remediation.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Nanoscale
·
2025
·
IF 5.1
Ying Cao,Shihao Deng,Shuang Xia,Ju Bai,Yuan Shen,Ting Zhang,Tie Li
Humanoid robots, except the sensing requirement of force and temperature, will get high risk of prolonged exposure to complex light conditions, especially the UV radiation in automotive baking workshop, outer space, et. al, which will make the circuits and electronic components extremely prone to aging, needing timely assessment as well. Here, a multimodal flexible tactile sensor is assembled by utilizing a novel melamine sponge-MXene@CsPbBr3 hybrid aerogel as the sensing unit, which the melamine sponge provides the deformable support skeleton, the MXene realizes the functions of piezoresistive pressure sensing and thermoelectric temperature detecting, and the CsPbBr3 realizes not only the light sensing behavior, especially the visual capacity of ultraviolet excited photoluminescence, but also the synergetic enhancement of thermoelectric ability. Via these different kinds of sensing mechanisms, the derived flexible tactile sensor realizes the multimodal response to pressure, temperature and ultraviolet without cross-coupling. Furthermore, via using a machine learning algorithm, it can distinguish hardness and material of six automotive parts with high recognition accuracy of 98.2 % and 98.6 %, respectively. Moreover, based on the visual photoluminescence capability, a sensory array is assembled to successfully recognize different shapes. These provides a feasible way to protect the robots when using in complex operating environments.
研究领域:
材料科学
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纳米技术
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机器人学
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传感器技术
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光电子学
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柔性电子学
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机器学习应用
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产品关联
DOI
PubMed
高影响因子
TALANTA
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2025
·
IF 6.1
Hao Zhang,Wanyi Li,Ying Zhong,Meng Zhang,Kaile He,Yihan Yuan,Jinyi Wang
Surface-enhanced Raman scattering (SERS) based on noble metal nanoparticles has garnered significant attention in analytical chemistry due to its simplicity and rapidity for low-concentration detection. Although widely applied in fields like environmental monitoring, food safety, and biomedical diagnostics, the impact of silver nanoparticle shape on SERS performance remains insufficiently studied. Furthermore, traditional stationary solid and liquid SERS approaches are limited by inconsistent reproducibility and temporal variations in uniformity, respectively. To overcome these limitations, we introduce a simple continuous and online Ag SERS platform that employs spherical silver colloids within a capillary-Teflon tube system for dynamic, real-time analyte detection. Continuous fluid flow reduces variations in colloids, ensuring uniformity, while the enclosed system limits dynamic behaviors of colloids, enhancing stability. This platform demonstrates outstanding stability, with relative standard deviations of 2.30%. Its versatility is showcased through the quantitative detection of melamine in milk, 6-thioguanine in serum, and histamine in beer, demonstrating its capability for accurate, real-time detection in complex food matrices. This continuous and online Ag SERS platform represents a significant advancement in reliable, high-performance analyte detection, offering promising prospects for real-time analytical applications and providing a cost-effective, scalable solution for widespread use.
研究领域:
分析化学
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纳米技术
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光谱学
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食品安全
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生物医学诊断
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环境监测
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Zhong-Min Xiao,Jia-Kang Liu,Guan-Feng Peng,Dong-Ping Li,Li-Ping Wang,Yong-Xiu Li
Oil spills and oily wastewater discharges not only cause serious environmental pollution but also result in great losses to water resources and harm to human health. Thus, there is an urgent need for an efficient and convenient oil–water separation method. In this work, the modified sponge (TFB-MDA@MS) was successfully obtained by grafting a covalent organic polymer (COPs) onto melamine sponge (MS). This composite sponge exhibited good hydrophobicity (the water contact angle in air was 147.7°) and excellent absorption capacity for different kinds of organic solvents (62.59–160.54 g/g), as well as excellent reusability. Furthermore, TFB-MDA@MS demonstrated a good separation effect on oil–water mixtures with a fast absorption speed. It maintained good hydrophobicity and absorption capacity in complex chemical environments (acids, alkalis and salts), and could achieve effective separation of water-in-oil and oil-in-water emulsions. This work presents a method for synthesizing COPs nanoparticle-modified hydrophobic sponges for oily wastewater treatment and the removal of organic pollutants from water surfaces.
研究领域:
环境科学
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材料科学
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化学工程
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高分子科学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
·
IF 2.8
Dengwang Lai,Mengyao Nan,Hao Wu,Li Liu,Yuhua Li,Yuejun Liu,Jun Yang
A green and bio-based flame retardant, MMT@PAMEL, was synthesized by coating phytic acid (PA) and melamine (MEL) self-assembled macromolecules onto the surface of montmorillonite (MMT) nanosheets. This novel flame retardant was employed to enhance the fire resistance of polyvinyl alcohol (PVA) films. To evaluate its fire performance, several standard tests were conducted, including the limiting oxygen index (LOI), vertical burning (UL 94), and cone calorimetry. The findings revealed a substantial enhancement in flame resistance. The LOI value of the PVA/MMT@PAMEL-15 composite film increased significantly from 19% (pure PVA) to 31%, achieving a UL 94 VTM-0 rating. Moreover, the peak heat release rate (PHRR) and total heat release (THR) of the PVA/MMT@PAMEL-5 composite film were reduced to 108.98 kW/m 2 and 2.71 MJ/m 2 , representing reductions of 57.11% and 33.42%, respectively, compared to the pure PVA film. The underlying flame-retardant mechanism was explored through thermogravimetric-infrared spectroscopy (TG-IR), scanning electron microscopy (SEM), Raman spectroscopy, and infrared spectroscopy. The results revealed that the primary mechanism involved PA decomposition during combustion, which released phosphorus-containing compounds that promoted the esterification of PVA, leading to the formation of char precursors. Additionally, the barrier effect of MMT contributed to the formation of a phosphorus-carbon composite, thereby reinforcing a continuous and compact carbon layer. Simultaneously, MEL released NH 3 and other non-combustible gases, which diluted the concentration of flammable gases and absorbed heat, forming a protective gas layer. These combined mechanisms significantly enhanced the fire resistance of the PVA composite films, providing a sustainable solution for improving fire safety in polymer materials.
研究领域:
材料科学
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高分子科学
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消防安全工程
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纳米技术
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环境科学
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产品关联
DOI
高影响因子
Collagen and Leather
·
2024
·Vol. 6
·期 1
·1-12
·
IF 0
Zhang Chi,Zhou Ji-bo,Sun Nan,Liao Xue-pin,Shi Bi
Melamine resin (MR), traditionally synthesized using melamine and formaldehyde, is widely used in the leather industry. However, the emission of free formaldehyde poses a significant challenge for conventional MR. To address the issues of aldehyde in MR, extensive research has been conducted. This paper introduces a novel aldehyde-free MR (LTSL) retanning agent synthesized using cyanuric chloride, l-lysine, and sodium sulfanilate. The chemical structure of LTSL was analyzed via Fourier transform infrared spectroscopy, nuclear magnetic resonance, and X-ray photoelectron spectroscopy. The presence of amino, carboxyl, and sulfonic acid groups in LTSL enhanced its storability and imparted LTSL with an amphoteric character. The isoelectric point of LTSL was optimized to reach 4.37, and LTSL exhibited an appropriate size distribution with an average particle size of 254.17 nm and achieved high absorption rates of 87.77% and 95.84% for retanning and fatliquoring agents, respectively. Consequently, the thickness rate of LTSL reached up to 37%, with no detectable formaldehyde. Notably, LTSL also demonstrated excellent physical and mechanical properties, primarily attributed to the coordination and electrostatic interactions between the chrome-tanned collagen fiber and amino/carboxyl groups in LTSL. This research presents an innovative approach for developing an aldehyde-free MR retanning agent, significantly contributing to the sustainable development of leather manufacturing. Graphical Abstract
研究领域:
材料科学
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皮革工业
·
化学合成
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DOI
JOURNAL OF POWER SOURCES
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2014
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IF 5.211
Rongfang Wang,Tiaobao Zhou,Hao Li,Hui Wang,Hanqing Feng,Jonathan Goh,Shan Ji
Melamine-derived N-doped mesoporous carbon (MNMC) is synthesized by the pyrolysis of lysine and melamineunder at nitrogen atmosphere using ferric chloride as a dopant and SiO 2 nanoparticles as hard templates to form mesoporous architecture. The N content in the bulk of carbon materials is as high as 11.3% and ca. 40.6% of N is in the form of pyridinic-N. The surface area of MNMC is ca. 650 m 2 g −1 with a pore size distribution in the range of 2.2–34.5 nm. Compared to commercial Pt/C (20 wt%), MNMC exhibits much better electrocatalytic activity , better durability, and higher methanol tolerance for oxygen reduction reaction (ORR) in alkaline medium . Particularly, the onset ORR potential and half-wave ORR potential of MNMC are 1.059 and 0.871 V vs . RHE respectively, which are higher than those of commercial Pt/C.
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DOI
高影响因子
JOURNAL OF CRYSTAL GROWTH
·
2020
·
IF 1.632
Lang Sun,Xintong Xu,Dalin Sun,Jiaqi Chen,Shaowen Chu,Wentao Shi,Shuangchen Ruan
We report effects of crystallization conditions and gel composition on the hydrothermal synthesis of large zinc-doped AlPO 4 -15 (ZnAlPO 4 -15) single crystals by using melamine (MA) as structure directing agent (SDA). By optimizing the following synthesis conditions: amount of MA, molar ratio of ZnO/Al 2 O 3 , molar ratio of P 2 O 5 /Al 2 O 3 , crystallization temperature and duration, the pure phase of ZnAlPO 4 -15 (size up to 95 μm) with good optical transparency can be obtained at 200 °C with 40 h in the system of Al 2 O 3 :1.07MA:0.27ZnO: 1.15P 2 O 5 :667H 2 O. To the best of our knowledge, it is the first report of synthesizing ZnAlPO 4 -15 by using MA as SDA.
研究领域:
材料科学
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无机化学
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晶体生长
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DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Xiao-Ru Zhao,Xia Xu,Xin-Yu Jiang,Jie-Teng,Jin-Gang Yu
Self-assembly of three-dimensional graphene oxide-melamine (GO-ME x:y ) composites with various GO-to-ME mass ratios (x:y) of 5:1 to 25:1 was carried out by a facile hydrothermal method. GO-ME was characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The adsorption properties of GO-ME toward rare earth elements (REEs), phenols and dyes in aqueous solutions were investigated. It was found that REEs could be better adsorbed onto GO-ME 20:1 with maximum adsorption capacities of 25.04, 14.08, 20.88, 19.96, 26.68 and 25.28 mg g – 1 toward La 3 + , Y 3 + , Yb 3 + , Er 3 + , Eu 3 + and Nd 3 + , respectively. And GO-ME 15:1 showed relatively higher adsorption capacities of 65.77, 70.11 and 23.49 mg g – 1 for 3-nitrophenol, p-nitrophenol and hydroquinone, respectively. Organic dyes could be preferably adsorbed by GO-ME 10:1 , and its maximum adsorption capacities toward neutral red (NR) and alizarin yellow R (AYR) were 80.49 and 189.33 mg g – 1 , respectively. In brief, GO-ME x:y nanocomposites were expected to be used as efficient sorbents for the adsorption removal of REEs, phenols and organic dyes.
研究领域:
环境科学
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材料化学
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吸附技术
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纳米复合材料
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水处理
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DOI
高影响因子
危险品化学品经营许可证（带存储）