Frontiers of Materials Science
·
2020
·Vol. 14
·期 1
·62-72
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IF 1.747
Liu Guojin,Han Pengshuai,Chai Liqin,Lu Peng,He Yuping,Zhou Lan
Patterned photonic crystals with structural colors on textile substrates have attracted a special attention due to the great advantages in application, which currently become a research hot-spot. This study utilized an ink-jet printing technology to prepare high-quality photonic crystal patterns with structural colors on polyester substrates. The self-assembly temperature of poly(styrene-N-methylol acrylamide) (P(St-NMA)) microspheres set to construct photonic crystals were deeply optimized. Moreover, the structural colors of prepared photonic crystal patterns were characterized and evaluated. When the mass fraction of P(St-NMA) microspheres was 1.0 wt.%, the pH value ranged from 5 to 7, and the surface tension was in the range of 63.79 to 71.20 mN/m, inks could present the best print performance. At 60 °C, prepared P(St-NMA) microsphere inks were good for printing to obtain patterned photonic crystals with regular arrangement and beautiful structural colors. Specifically, photonic crystals with different colors could be constructed by regulating the diameter of microspheres in inks, and prepared structural colors exhibited distinct iridescent phenomenon. The present results could provide a theoretical basis for the industrial realization of patterned photonic crystals by ink-jet printing technology.
研究领域:
材料科学
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纺织工程
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DOI
高影响因子
RSC Advances
·
2014
·Vol. 5
·期 9
·6413-6418
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IF 3.708
Hui Li,Guoping Zhang,Libo Deng,Rong Sun,Xing Ou-Yang
Thermally responsive copolymer P(NIPAm-co-NMA) was prepared via a radical copolymerization and spun into nanofibers using electrospinning. After thermal crosslinking, the electrospun fibers were modified using KH590 and silver nanoparticles were introduced onto the fiber surface using a chemical plating method. The electrical resistance of the composite fibers containing 65.5% of silver at different temperatures was investigated and it was found that the resistance dropped by ∼60% as the temperature increased from 42 °C to 46 °C, which is consistent with the solubility transition of PNIPAm with the change of temperature as revealed by differential scanning calorimetry (DSC) measurement.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
·
IF 3.573
Yujia Tong,Lukuan Huang,Chengjiang Zuo,Weixing Li,Weihong Xing
Improving the hydrophilicity of the poly(vinylidene fluoride) (PVDF) ultrafiltration membrane can change its adsorption fouling characteristics. Here, a novel amphiphilic material of PVDF grafted with N-methylolacrylamide (PVDF-g-NMA) was developed via photoinduced Cu(II)-mediated reversible deactivation radical polymerization (RDRP). The PVDF-g-NMA ultrafiltration membrane was prepared by the nonsolvent-induced phase-separation method. The PVDF-g-NMA copolymer was characterized by 1H NMR and Fourier transform infrared spectroscopy. The performance of the PVDF-g-NMA membrane was evaluated by determining the permeation flux, contact angle, roughness, and antifouling tests. The roughness data show that a low content of N-methylolacrylamide can effectively reduce the surface roughness of membranes by 50%, resulting in greater antifouling ability. The prepared ultrafiltration membrane containing 15 wt % PVDF-g-NMA exhibited the best hydrophilicity with an average pure water flux of up to 272.1 L·m–2·h–1, higher than that of the pure PVDF membrane (45.4 L·m–2·h–1). The contact angle of the PVDF-g-NMA ultrafiltration membrane decreased from 85.5 to 67.4°. The bovine serum albumin rejection rate of the PVDF-g-NMA membrane significantly increased from 85.7 to 92.6%, and the pure water flux recovery rate increased from 79.0 to 88.5%. The PVDF-g-NMA ultrafiltration membrane had excellent hydrophilicity and antifouling properties, which would be promising for wastewater treatment.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
高影响因子
CHROMATOGRAPHIA
·
2018
·Vol. 82
·期 8
·1285-1293
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IF 1.401
Wang Huimin,Guo Bin,Pang Xiaoya,Yu Huan,Liu Haiyan,Yan Hongyuan,Han Dandan,Guo Huaizhong,Bai Ligai
A poly(NMA-ST- co -TAIC-EDMA) monolithic column was prepared by redox initiation method using N -methylolacrylamide (NMA) and styrene (ST) as co-monomers. The composite monolith was characterized by scanning electron microscopy (SEM) and nitrogen adsorption–desorption isotherm and was used as a solid phase extraction (SPE) absorbent for enrichment of β -sitosterol by high performance liquid chromatography (HPLC). Under the optimum conditions for extraction and determination, the calibration equation was y = 1.02247 x + 0.1766; the linear range was 0.015–0.75 mg mL −1 and the linear regression coefficient was 0.998. The limit of detection (LOD) and the limit of quantification (LOQ) were 0.006 mg mL −1 and 0.02 mg mL −1 , respectively. The spiked recoveries of β -sitosterol in edible oil samples were 83.60–103.88%; precisions for intra-day and inter-day assays presented as relative standard deviations were less than 6.0% and 6.2%, respectively. The enrichment factor of β -sitosterol was 60 and the results showed that the monolithic column had high selectivity and good permeability as an on-line SPE absorbent for the enrichment and determination of β -sitosterol from edible oils.
研究领域:
分析化学
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食品科学
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材料科学
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产品关联
DOI
高影响因子
MATERIALS SCIENCE FORUM
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2019
·
IF 0
Yong Li Peng,Can Zhang,Ni An Zhuo
Using 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10 oxide (DOPO) and N-methylol acrylamide as the main raw materials, the curing agent DOPO-NMA was synthesized. The flame retardant curing agent DOPO-NMA and E-51 epoxy resin (EP) were then cured to obtain epoxy resin E-51 system, and its flame retardancy, thermal stability and mechanical properties were studied. The results showed that the tensile, bending and impact strength of the cured system decreased with the increase of phosphorus mass fraction in the resin system, and the flame retardancy rating, limiting oxygen index (LOI) and char yield at 700°C increased with the increase of phosphorus mass fraction in the resin system.
研究领域:
材料科学
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化学工程
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产品关联
DOI
ENERGY CONVERSION AND MANAGEMENT
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2016
·
IF 4.801
Pengju Han,Xiaolin Qiu,Lixin Lu,Liao Pan
MicroPCMs (microencapsulated phase-change materials) were successfully synthesized using PMMA (poly(methyl methacrylate)) and UF (urea-formaldehyde) as raw materials for hybrid shells, and n -tetradecane as core materials. NMA ( n -methylol acrylamide) with two functional groups of double-bond and hydroxymethyl was used as a crosslinking agent. The morphologies and chemical structures of microPCMs were characterized using scanning electron microscopy (SEM) and Fourier transformed infrared (FTIR) spectroscopy. The agglomerations of the UF/PMMA hybrid samples might be influenced by two factors: cross linking action of NMA and PMMA/UF ratio in shell materials. The phase change properties and thermal durability were investigated by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA), respectively. The UF/NMA/PMMA hybrid shell microcapsules has an enthalpy of 175.5 J/g which is higher than the single-layer shell samples of PMMA and UF, and a better leakproofness than the UF/PMMA hybrid samples without NMA owing to the semi-IPN microstructure. Likewise, the UF/NMA/PMMA hybrid samples have higher thermal durability than the single layer shell samples of PMMA and UF and the UF/PMMA hybrid samples without NMA. Moreover, the thermal cycling test of the UF/PMMA hybrid samples with NMA was carried out for 100 heating/cooling cycles and indicated that the developed hybrid shell microPCMs have good chemical stability and thermal reliability. The heating-up experiment revealed that the foam treated by microcapsules had a better thermoregulatory property than the raw foam. Based on the results obtained, it can be concluded that n -tetradecane/UF/PMMA microPCMs have potential thermal energy storage applications.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122346
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IF 7.5
Xiaolong Zhang,Haowen Zhuang,Chenxuan Shao,Chen Wang,Xiaohui Ju,Qi Zhang,Yujia Tong,Weixing Li
Although membrane separation technology has been widely used for oily wastewater treatment in recent years, surface fouling still poses a great threat to application. Due to the strong adsorption of oil droplets onto membrane surface and within pores, pristine membranes are inadequate for long-term oil-water separation applications. Here, a novel photocatalytic nanofiber membrane via microchip grafting with in-situ mineralization was proposed. N-Methylolacrylamide (NMA) was successfully grafted on polyvinylidene fluoride (PVDF) by microfluidic electrospinning, and the grafting amount was 9 times that under conventional bottle reaction conditions. The in-situ mineralization time via the polyphenol-metal network was reduced from 27 h to 18 h, while the mineralization rate increased by threefold compared with the bottle-grafted membrane. For oil-water emulsion separation, the developed PVDF-g-NMA@FeOOH membrane successfully showed the high permeability of 38870 L·m −2 ·h −1 ·bar −1 with the outstanding rejection rate of 99.2%. It displayed great photocatalytic self-cleaning performance, and the flux recovery rate was up to 95.8% after cycle tests. Methhyllene blue (MB) removal rate reached 96.3% in 50 min. The developed membrane holds great promise for applications in oil-water separation and organic contaminant degradation.
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DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2022
·
IF 7.693
Jieyu Sun,Xiuyi Lin,Yuhan Qiu,Runyu Wang,Yanfei Zhang,Chuanshuang Hu,Weiwei Zhang
Bamboo is an eco-friendly and sustainable material but with limited application due to its susceptibility to mold infection. N -methylol acrylamide (NMA) is a cross-linking monomer with bifunctional groups, here NMA was used to modified bamboo to enhance its anti-mold property through in situ polymerization and cross-linking reaction. When the monomer concentration was 6% and above, no mold germinated at the NMA treated bamboo surface. SEM/EDX, FTIR was used to explore the anti-mold mechanism of NMA modified bamboo. The primary reason for the improvement in the anti-mildew property was the coating effect of PNMA on starch as well as the antimicrobial properties of PNMA. Thermal stability of bamboo before and after modification was almost unchanged. Results also indicated that the mechanical properties of modified bamboo are improved by around 50%, which was mainly attributed to more compact structure of cell wall obtained in the neutral reaction condition. The NMA in situ polymerization was proved to be a potential modification for bamboo to broaden its application.
研究领域:
材料科学
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生物学
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产品关联
DOI
高影响因子
Pigment & Resin Technology
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2022
·Vol. 53
·期 2
·145-153
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IF 1.126
Wanting Zhao,Lijun Chen
PurposeSelf-crosslinked long fluorocarbon acrylate polymer latex has good hydrophobic and oleophobicity, weather resistance, aging resistance, stability and other excellent properties, which make the polymer be widely used in coatings, dyes, adhesives and other products. The purpose of this study is to prepare self-crosslinked long fluorocarbon acrylate polymer latex via semi-continuous seeded emulsion technology and carry out comparative study on two different cross-linked monomers.Design/methodology/approachMethyl methacrylate (MMA) and butyl acrylate (BA) were used as the main monomers, dodecafluoroheptyl methacrylate (DFMA) as the fluoromonomer, hydroxypropyl methacrylate (HPMA) andN-methylol acrylamide (NMA) as cross-linked monomers, and 1-allyloxy-3–(4-nonylphenol)-2-propanol polyoxyethylene (10) ether (ANPEO10) and 1-allyloxy-3–(4-nonylphenol)-2-propanol polyoxyethylene (10) ether ammonium sulfate (DNS-86) as compound emulsifiers via the semicontinuous-seeded emulsion polymerization.FindingsThe properties of the polymer emulsions, which are prepared with two different cross-linked monomers, are compared and discussed, and it is concluded that HPMA is more suitable for the preparation of self-crosslinked polymer emulsions. The formula of the polymer latex is ANPEO10: DNS-86 = 1:1, and the mass ratio of the monomers used in the polymer is MMA: BA: DFMA: HPMA = 14.40:14.40:0.60:0.60.Practical implicationsSelf-crosslinked long fluorocarbon acrylate polymer latex can be used in many fields such as coatings, dyes, adhesives and other products.Originality/valueThe self-crosslinked long fluorocarbon acrylate polymer latex is prepared by mixing the nonionic emulsifier ANPEO10 and the anionic emulsifier DNS-86 when potassium persulfate is used as the thermal decomposition initiator and the semicontinuous-seeded emulsion technology is adopted and the comparative study on two different cross-linked monomer is carried out, which is not reported in the open literatures.
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
ACS Energy Letters
·
2021
·
IF 23.101
Lvpeng Yang,Yun Zhang,Junming Ma,Ping Chen,Yu Yu,Ming Shao
Efficient and spectrally stable pure-red perovskite light-emitting diodes (PeLEDs) are still rare and urgently needed for high-definition display. The traditional color tuning method by varying halide composition undergoes phase segregation and has spectral instability issues. Instead of halide mixing, we fabricate pure-red PeLEDs based on quasi-two-dimensional (quasi-2D) perovskites by simultaneously incorporating phenethylammonium (PEA) and 1-naphthylmethylammonium (NMA) cations. The control of PEA and NMA cospacer ratio modulates the phase distribution and the resulting different color emission. The PeLEDs with PEA:NMA molar ratio of 5:5 exhibit a pure-red (635 nm) electroluminescence (EL) with a CIE coordinate (0.709, 0.285) approaching the Rec. 2020 specification. Meanwhile, the optimized devices exhibit an external quantum efficiency (EQE) of 12.41% and a maximum brightness of 1452.6 cd m–2, which are among the best-performing pure-red PeLEDs based on quasi-2D perovskite to date. Additionally, our PeLEDs demonstrate stable EL spectra under different operating voltages and continuous operation.
研究领域:
材料科学
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光电技术
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Xinrui Chen,Yudong Shang,Peng Gu,Yan Ren,Shihua Li,Siyu Fang,Huajie Zhong,Linhe Zhu,Jianhui Mei,Yuanlin Wu,Suqing Chen
In response to the growing global restrictions on fluorinated compounds, this study aims to develop an environmentally friendly and durable fluorine-free water-repellent finishing agent for textiles. A series of cross-linked acrylic emulsions were synthesized using MMA as the hard monomer, BA as the soft monomer, ODA as the hydrophobic functional monomer, and GMA and NMA as the crosslinking monomers. The effects of GMA content on the water repellency and emulsion properties were systematically investigated. To further enhance the hydrophobic performance, SiO₂ and TiO₂ nanoparticles were introduced through both composite emulsification and a step-by-step finishing method. The results showed that the optimal GMA content effectively improved the gelation rate, conversion rate, and contact angle of the treated fabric. Nanoparticle modification increased surface roughness, improved wash durability, and enhanced thermal stability, as confirmed by TG and DSC analyses. Among the modifiers tested, PTES achieved the best hydrophobic enhancement with a maximum contact angle of 146 °. Compared with untreated fabric, the spray grade increased from 0 to 4, and the abrasion resistance was markedly improved. This fluorine-free water-repellent system provides a promising alternative to traditional fluorinated agents, offering high water repellency, thermal stability, and fluorine-free and environmentally preferable.
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
·
IF 3.99
Zhen Yang,Liqin Cao,Yongmao Qian
Herein, Cu-BDC/poly( N -methylol acrylamide- co -sodium allyl sulfonate) [Cu-BDC/P(NMA- co -SAS)] macroporous foam was synthesized templating from CO 2 -in-water (C/W) high internal phase emulsions (HIPEs), and using Cu-BDC as Pickering emulsifier . The features of the macroporous monolith, such as structure and void diameter, can be adjusted by changing the emulsion composition . The resultant macroporous foams have a low bulk density (0.317 g cm −3 ), high porosity (79.60 %), suitable pore volume (3.956 cm 3 g -1 ), and pore size ranging from 5.46 μm to 36.47 μm. The maximum swelling degree of 20.7 g/g for the composite foam was obtained when a high MBAM dosage of 12.5 wt% was used. Moreover, adsorption behavior and antibacterial property of the composite foam with 5.0 wt% Cu-BDC were investigated. The results proved that the obtained foam could behave as a potential multi-functional antibacterial material.
研究领域:
材料科学
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环境科学
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生物学
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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）