JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 7
·1-11
·
IF 2.8
Li Ming,Ou Hongxiang,Tu Zhe,Zhou Wenqian,Xue Honglai,Zhu Fang
Polypropylene (PP) is flammable and releases a large amount of smoke, which limits its wide application in construction, electrical appliances and medical fields. In this study, the flame retardancy and mechanical properties of PP materials were significantly improved by innovating the intumescent flame retardant system. In this study, the modified piperazine pyrophosphate (MF@PAPP) with core–shell structure was prepared by microencapsulation technology, in which melamine formaldehyde (MF) resin serves as shell and piperazine pyrophosphate (PAPP) as core, and it was compounded with magnesium hydroxide (MH) to prepare flame retardant polypropylene (PP) materials. The effects of MF@PAPP and MH on the flame retardancy and mechanical properties of PP flame retardant materials were studied by various test methods. The results showed that when 23 wt% MF@PAPP and 2 wt% MH were added, the limiting oxygen index (LOI) value of PP was 30.4%, and UL-94 was V-0 rating. The total heat release (THR) and total smoke release (TSR) were reduced by 39.7% and 82.8%, respectively, compared with pure PP. The tensile strength and elongation at break reached 30.4 MPa and 141.5%, respectively. The combination of MF resin and PAPP improved the compatibility of PAPP in PP. At the same time, MF@PAPP had synergistic effects with MH to obtain better thermal stability and catalytic carbonization effects. In summary, this study provides a potential direction for the development of efficient flame retardants and the development of PP flame retardant materials.
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高影响因子
Nano-Micro Letters
·
2022
·Vol. 14
·期 1
·1-16
·
IF 23.655
Cheng Haoran,Pan Yamin,Wang Xin,Liu Chuntai,Shen Changyu,Schubert Dirk W.,Guo Zhanhu,Liu Xianhu
Ni-MXene/MF foam is synthesized via an electrostatic assembly and dip-coating process.
The “micro-capacitor” structure of Ni/MXene and the 3D porous structure of MF endow the foam excellent impedance matching and wave absorption performance.
The excellent heat insulation, infrared stealth, and flame-retardant performances are achieved.
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MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Hong-mei Zuo,Hao Yin,Guoji Yu,Hongjie Wang,He Wang,Yanxia Xie,Fangtao Ruan,Zhenzhen Xu,Lihua Zou,Dian-sen Li
The intensification of electromagnetic pollution has boosted the exploration of high-performance electromagnetic interference (EMI) shielding materials. Herein, 2D MXene, 1D nickel (Ni) chain and PDMS were anchored on 3D porous skeleton of melamine sponge (MS) by a simple, inexpensive and scalable “dipping and coating” method, and a lightweight 3D hybrid nanostructure (MXene-Ni-PDMS/MS) was prepared. Super hydrophobic, high electric conductivity, excellent EMI shielding and outstanding super-elastic performances were obtained via the synergy effect of conductive 2D MXene and 1D Ni chain and hydrophobic PDMS. The results showed that the EMI of MXene-Ni-PDMS/MS with thickness of 10 mm could reach about 50 dB, which was 50 % higher than 25 dB of sponge with thickness of 2 mm, and could meet 20 dB commercial application. Moreover, the hybrid sponge exhibited super-elastic characteristics and could recover to its original state under 60 % strain during compressive fatigue. Even when it was subjected to 500 cycles at 40 % strain, the maximum compressive stress, Young's modulus and energy loss coefficient slightly decreased, indicating that the structure could maintain stable physical properties. The water contact angle could reach 145.1°, showing hydrophobic characteristics. This work offers a novel way for synthesis of excellent EMI shielding materials based on sponge.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Feifei Lu,Aiqin Dong,Guanjun Ding,Ke Xu,Jumei Li,Lijun You
Magnetic porous Fe 3 O 4 /MRCS polymer composite was prepared by reacting melamine-formaldehyde resin with chitosan in the present of amino modified Fe 3 O 4 nanoparticles and used as adsorbent for acid red 18 azo dye removal. The Fe 3 O 4 /MRCS was characterized by TEM , SEM, XRD, TGA and BET analysis. The Fe 3 O 4 /MRCS possessed high BET surface area (226.6 m 2 /g), characteristic pore properties and facile magnetic separation function. The average pore width is 6.5 nm and the pore volume was 0.68 cm 3 /g. The Fe 3 O 4 /MRCS presented enhanced high adsorption performance toward acid red 18. It removed 99. 65% of acid red 18 (100 mg/L) when the adsorbent amount was over 0.8 g/L. It was found the absorption was depended on pH and the removal efficiency decreased with pH increased. The maximum adsorption capacity of acid red 18 reached as high as 301.0 mg/g. The adsorption kinetic followed the pseudo-second-order kinetics model and the activation energy of the adsorption process was 38.40 kJ/mol. The adsorption isotherms were best fitted to the Redlich–Peterson isotherm equation. Thermodynamic studies indicated the adsorption process was spontaneous and endothermic in nature. The adsorption mechanism study showed the adsorption was a heterogeneous chemisorption process with multiple interactions, involving pore filling, electrostatic attraction, affinity interaction, intra-particle diffusion, π-π interaction and polymer chain inclusion and polymer net trapping. In comparison with other reported adsorbents, the magnetic porous Fe 3 O 4 /MRCS showed superior adsorption performance for acid red 18 removal.
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Materials Research Express
·
2020
·Vol. 6
·期 12
·125376
·
IF 1.929
Sainan Wu,Pan Zhang,Zhilong Xu,Zhang Chen,Yanfeng Gao
A series of microencapsulated phase change materials (microPCMs) are synthesized by encapsulating 1-dodecanol into cellulose nanofibers (CNFs) modified melamine-formaldehyde (MF) resin through in situ polymerization. The chemical structure and crystallography of the microcapsules are characterized by Fourier-transform infrared spectroscopy (FT-IR) and x-ray diffraction (XRD). Scanning electronic microscopy (SEM) images show that the obtained microcapsules are regularly spherical with smooth surface and an average diameter about 1∼3 μm. The cracking ratio test indicates that the addition of CNFs largely enhances the mechanical strength of the microcapsules, and the CNFs/MF-microPCMs (with 3.4 wt% CNFs) have a phase change enthalpy of 100.4 J g−1. Furthermore, the simulation result demonstrates that the indoor temperature modulation ability of CNFs/MF-microPCMs model house is 4.2 °C, which is more than that of model house without microPCMs under room temperature. These results indicate that CNFs/MF-microPCMs are potential candidates for thermoregulating applications.
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ACS Omega
·
2019
·
IF 2.584
Chao Zhang,Jiandong Liu,Xiayun Huang,Daoyong Chen,Shiai Xu
Graphene-like g-C3N4 nanosheets (NSs) have been successfully synthesized with a modified polymerization process of melamine by cocondensation with volatile salts. Volatile ammonium salts such as urea–NH4Cl/(NH4)2SO4/(NH4)3PO4 were added with melamine to modulate the thermodynamic process during polymerization and optimize the structure formation in situ. The surface area, surface structure, and surface charge state of the obtained g-C3N4 NSs could be controlled by simply adjusting the mass ratio of the melamine/volatile ammonium salt. As a consequence, the g-C3N4 NSs exhibited much higher activity than bulk g-C3N4 for the photocatalytic degradation of target pollutants (rhodamine B, methylene blue, and methyl orange), and it also exhibited greater hydrogen evolution under visible light irradiation with an optimal melamine/volatile ammonium salt ratio. The as-prepared g-C3N4 NSs with melamine–urea–NH4Cl showed the highest visible light photocatalytic H2 production activity of 1853.8 μmol·h–1·g–1, which is 9.4 times higher than that of bulk g-C3N4 from melamine. The present study reveals that the synergistic effect of the enhanced surface area, surface structure, and surface charge state is the key for the enhancement of photocatalytic degradation and hydrogen evolution, which could be controlled by the proposed strategy. The result is a good explanation for the hypothesis that adding properly selected monomers can truly regulate the polymerization process of melamine, which is beneficial for obtaining g-C3N4 NSs without molecular self-assembly. Considering the inexpensive feedstocks used, a simple synthetic controlling method provides an opportunity for the rational design and synthesis, making it decidedly appealing for large-scale production of highly photocatalytic, visible-sensitizable, metal-free g-C3N4 photocatalysts.
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ChemNanoMat
·
2025
·
IF 2.6
Xuefei Zhang,Zhaojun Li,Chengyao Wang,Ting Yan
Microencapsulated phase change materials (MPCMs) with excellent photothermal conversion performance are prepared via in situ polymerization method, whose core material and shell material are n-hexadecane and graphene oxide (GO) modified melamine formaldehyde (MF), respectively. The concern here is how the GO affects the properties of prepared microcapsules for morphology, thermal properties, and photothermal conversion. The prepared n-hexadecane@MF/GO MPCMs possess preferable sphericity and well-defined core–shell structure. The prepared MPCMs exhibit excellent thermal energy storage capacity. Adding GO can effectively improve latent heat and encapsulation efficiency. The MPCMs with 0.1 wt% GO have the best latent heat of 169.12 J g − 1 and the highest encapsulation efficiency of 74.54%. Due to the promoted optical response in visible light and near-infrared-light of GO, photothermal conversion efficiencies of modified MPCMs are obviously raised above 40%. As the GO proportion is 0.3 wt%, the modified MPCMs reache the maximum photothermal conversion efficiency of 88.04%, 64.47% higher than unmodified MPCMs.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yun Feng,Jinrong He,Jinzhen Cao,Wei Qu,Limin Peng
Melamine formaldehyde (MF) resin is a widely used decorated material, but its inherent brittleness limits broader applications. In this study, a novel bio-based nanomaterial (AQ@HNTs) was fabricated via a layer-by-layer self-assembly of quaternized chitosan and sodium alginate onto halloysite nanotubes (HNTs), providing a green and efficient strategy for natural nanotube surface modification. The resulting AQ@HNTs were incorporated into MF resin to synergistically enhance its toughness and antibacterial properties without affecting its curing behavior at 120 °C. Comprehensive characterization of AQ@HNTs was performed using Fourier transform infrared spectroscopy (FTIR), Zeta potential analysis, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM). The mechanical and antibacterial performance of the resulting MF-AQH resin-impregnated paper was evaluated for mechanical properties, antibacterial performance, and crack resistance through dynamic mechanical analysis (DMA), mechanical testing, antibacterial assays, and crack resistance tests. The paper impregnated with 5 wt% AQ@HNTs exhibited significantly improved mechanical properties, with tensile strength, elongation at break, and elastic modulus increasing by 78.11 %, 39.66 %, and 27.61 %, respectively. Additionally, it demonstrated strong antibacterial activity against Escherichia coli and Staphylococcus aureus , with inhibition zones of 21.97 ± 0.57 mm and 32.19 ± 0.37 mm, and bacterial survival rates reduced to 17.99 % and 11.52 %, respectively. This work highlights a dual-functional approach combining structural reinforcement and antimicrobial activity through an innovative bio-based modification strategy, offering a promising solution for high-performance MF resin in interior decoration applications.
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PubMed
高影响因子
Advanced Materials Interfaces
·
2019
·Vol. 6
·期 10
·1900025
·
IF 4.713
Jundong Zhu,Jiang Hu,Tangping Peng,Chongwen Jiang,Siyuan Liu,Ying Li,Tianyu Guo,Le Xie
Sponge-like sorbent materials with superhydrophobic/oleophilic properties have drawn significant attention for effective clean-up of oil spills and complex water treatment. However, their cost-effective and high-selectivity adsorption remain a great challenge. Herein, a novel superhydrophobic melamine–formaldehyde (MF) sponge is treated with coupling agent–isocyanate siloxane 3-isocyanatopropyltriethoxysilane (ICPTES) via a urea cross-linking process, and then condensing with hydrophobic silane (dodecyltrimethoxysilane, DTMS) in alcohol solution. The as-prepared Si–MF–DTMS sponge (water contact angle as high as 155.4°) demonstrates favorable chemical and thermal stability in harsh environment, high absorption capacity (74.9–161.4 g g −1 ) for organic liquids, and outstanding separation capability for emulsions. Meanwhile, excellent elasticity and durability allow the organics and oil to squeeze out of the sponge during recycling process easily. Moreover, modified sponge can continuously separate oil and organic pollutants from water by collection device. Thus, a facile, appropriate, and effective strategy used in this work to fabricate superhydrophobic advanced sorbent materials for oil–water separation application is based on surface modification strategy by a coupling agent, which shows enormous potential in oil-spill remediation and industrial chemistry pollution control.
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高影响因子
Frontiers in Materials
·
2023
·
IF 3.2
Wang Wei,Song Xiangning,Xie Yan,Sheng Xuejia,Zhang Shucai
In recent years, oil spills and organic pollution have caused severe damage to the ecological environment. Therefore, the treatment of oily wastewater has become a serious challenge. Here, with the help of melamine foams as a substrate, MXene nano-rough structures were built, and cetyltrimethoxysilane was grafted onto their surfaces to create an oil-absorbing material that is both user-friendly and effective at oil-water separation. Due to the nano structures of MXene were constructed and the long-chain silanes were modified on the foam surface, the material became superhydrophobic. In addition to being able to selectively absorb oils from an oil/water mixture (including emulsified oils) up to 111 times its weight, the modified foam was found to have a water contact angle of 157 which could selectively absorb oil but not water. Furthermore, it demonstrated sustained hydrophobicity and lipophilicity after experiencing strong acid/alkali or prolonged high-temperature treatment, allowing for various scenarios where oil-water separation can be used in severe settings without compromising performance.
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ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Shuhao Wei,Yiyang Qiu,Xiucheng Sun,Xiaolong Wang,Haitao Li,Guojun Lan,Jian Liu,Ying Li
Conversion of waste plastics into high value carbon materials is of great importance for sustainable development. Herein, we propose a new approach to prepare sustainable nanoporous carbon catalysts (NPCs) with high catalytic performance for acetylene hydrochlorination by using waste poly(vinyl chloride) (PVC) as carbon source via a solid grinding method with the assistance of melamine. The addition of melamine not only makes the dechloridation of PVC occur easily at room temperature but also greatly improves the yield of carbon products. The nitrogen and defective sites of the NPCs can be easily adjusted by tuning the amount of melamine. Furthermore, NPCs as a carbon catalyst show superior catalytic performance in acetylene hydrochlorination, and the generated vinyl chloride (VCM) can be polymerized to produce PVC, which realizes the recycling of materials.
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ANALYTICA CHIMICA ACTA
·
2016
·
IF 4.712
Jiankun Cao,Hongyuan Yan,Shigang Shen,Ligai Bai,Haiyan Liu,Fengxia Qiao
New hydrophilic molecularly imprinted melamine-urea-formaldehyde monolithic resin (MIMR) is synthesized using dopamine hydrochloride as a dummy template via in-situ polymerization directly within pipette tips and it presents special molecular recognition to plant growth regulators in aqueous matrices. Hydrophilic groups (such as hydroxyl groups , imino groups , and amino groups) can be introduced into MIMR by melamine– urea–formaldehyde resin, which make MIMR materials compatible with aqueous media and show their specific molecular recognition in aqueous sample solutions. Meanwhile, monolithic structures avoid the influence of uneven filling on the extraction efficiency. Various parameters affecting the selective recognition of MIMR have been optimized, such as molar ratio of melamine to urea, molar ratio of melamine and urea to formaldehyde, the amount of template and porogen . The prepared MIMR is applied as the sorbents of solid phase extraction (SPE) for sensitive and selective recognition of three plant growth regulators ( p -chlorophenoxyacetic acid, 1-naphthaleneacetic acid and 2.4-dichlorophenoxyacetic acid) in bean sprouts. Considering its excellent hydrophilicity and specificity, MIMR–SPE is promising to be a potential pretreatment strategy in biological, environmental, and clinical fields.
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