JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 31
·e55723
·
IF 2.7
Xiaoxuan Li,Zheng Yin,Yanru Zhao,Penghui Li,Shengli Wu
Isocyanate-based monomers and polymers have found widespread industrial application; however, the realization of green water-based products via the preparation of stable isocyanate aqueous emulsions remains challenging. Herein, a series of organosilicon and organofluorine synergistically modified amphiphilic branched polyurethanes (HBWPU), synthesized by grafting perfluorohexyl ethanol semi-terminated isophorone diisocyanate (IPDI) onto a hydrophilic polyurethane prepolymer, is presented. Subsequently, using a physical mixing method, stable diisocyanate emulsions are fabricated by preparing diisocyanate latex particles with IPDI as the core and hyperbranched water-based polyurethanes (HBWPU) as the shell. Structural investigations showed that the branching degree and fluorine content of the HBWPU significantly affects the stability of the diisocyanate emulsions. Increasing the degree of branching from 0.34 to 0.86 causes the amount of residual isocyanate ( NCO) groups to decrease from 20.1% to 16.7%. In contrast, an increase in the fluorine content from 0% to 17.8% increases the amount of residual NCO groups from 11.5% to 24.6%. Thus, HBWPU can be used as an emulsifier to prepare waterborne diisocyanate cross-linking agents. Such polyurethane-coated isocyanate aqueous emulsions can increase the hardness and significantly improve the acetone resistance of hydroxyl polyacrylate resins.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
·
2015
·Vol. 81
·期 11
·
IF 3.668
Huajun Feng,Xueqin Zhang,Kun Guo,Eleni Vaiopoulou,Dongsheng Shen,Yuyang Long,Jun Yin,Meizhen Wang
Fed batch bioelectrochemical systems (BESs) based on electrical stimulation were used to treat p-fluoronitrobenzene (p-FNB) wastewater at high salinities. At a NaCl concentration of 40 g/liter, p-FNB was removed 100% in 96 h in the BES, whereas in the biotic control (BC) (absence of current), p-FNB removal was only 10%. By increasing NaCl concentrations from 0 g/liter to 40 g/liter, defluorination efficiency decreased around 40% in the BES, and in the BC it was completely ceased. p-FNB was mineralized by 30% in the BES and hardly in the BC. Microorganisms were able to store 3.8 and 0.7 times more K+ and Na+ intracellularly in the BES than in the BC. Following the same trend, the ratio of protein to soluble polysaccharide increased from 3.1 to 7.8 as the NaCl increased from 0 to 40 g/liter. Both trends raise speculation that an electrical stimulation drives microbial preference toward K+ and protein accumulation to tolerate salinity. These findings are in accordance with an enrichment of halophilic organisms in the BES. Halobacterium dominated in the BES by 56.8% at a NaCl concentration of 40 g/liter, while its abundance was found as low as 17.5% in the BC. These findings propose a new method of electrical stimulation to improve microbial salinity resistance.
研究领域:
环境科学
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微生物学
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生物技术
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 47
·48208
·
IF 2.188
Chengbing Yu,Yilin Lu,Fangfang Wu
Polyester fabrics are usually difficult in dyeing deeply due to their dense structure and high surface refractive index, and deepening finishing is an effective method to obtain dark polyester fabrics. In this article, octamethyl cyclotetrasiloxane (D 4 ), 1,3,5-tris(3,3,3-trifluoropropyl)-methylcyclotrisiloxane (D 3 F), and silane coupling agent KH-902 were used as main monomers to synthesize organic fluorosilicone, and further to prepare cationic organofluorosilicone (COFS) and COFS darkening agent. FTIR and 1 H-NMR were used to characterize the structure of synthetic products. The finishing experiments confirmed that COFS darkening agent had good shade darkening on dyed polyester fabrics with small color change. The optimum conditions of deepening finishing were COFS darkening agent concentration of 20%, the pick-up of 85%, and the curing temperature of 180 °C. After finishing, the dyed fabric had no lowering effect on color fastness, all at grade 4 or above. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48208.
研究领域:
材料科学
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纺织工程
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有机化学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Juan Li,Boqiang Li,Huimei Pan,Yiya Wei,Yang Yang,Nan Xu,Baiyang Chen,Madjid Mohseni,Ehsan Banayan Esfahani
Quantifying total organic fluorine (TOF) in water is vital in monitoring the occurrence and persistence of all fluorine-containing organic compounds in the environment, while currently most studies focus on analyzing individual fluorine-containing organic compounds. To fill the technology gap, we herein proposed to convert TOF completely into fluoride with vacuum ultraviolet (VUV) photolysis, followed by analysis of fluoride with ion chromatography . Results showed that the tailored VUV photoreactor achieved satisfying recoveries of fluorine from ten model TOF compounds not only in ultrapure water (83.9 ± 2.0% to 109.4 ± 0.8%) but also in real water samples (92.1 ± 1.0%–106.2 ± 15.7%). Unlike other ultraviolet-based processes that favor alkaline conditions, this VUV process preferred either neutral or acidic conditions to defluorinate selected compounds. While the mechanisms remain to be explored in the future, it has been evidenced that the photo-degradation and photo-defluorination rates of these TOF compounds varied significantly among compounds and operation conditions. The method obtained a method detection limit (MDL) of 0.15 μg-F/L, which is lower than the MDLs of many other TOF analytical methods, along with excellent calibration curves for concentrations ranging from 0.01 to 10.0 mg-F/L. Notably, minimizing fluoride in sample prior to photoconversion was necessary to avoid subtraction-induced errors for TOF measurement, especially when the fluoride/TOF ratio was high. The robust VUV is also green for sample pretreatment due to its unreliance of chemicals or additives.
研究领域:
环境科学
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分析化学
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DOI
PubMed
高影响因子
Polymer-Plastics Technology and Materials
·
2025
·
IF 3
Ruihong Jiang,Jie Yu,Rui Li,Qin Tang,Dayu Song
The practical application of superhydrophobic coatings is limited by fabrication difficulties, poor mechanical properties, and low durability. In this study, coatings were prepared by blending organofluorosilicon-modified polyurea with hydrophobic nano- to submicron-sized particles, and their post-curing properties were investigated. The results show that under optimal parameters, the coatings exhibited a water contact angle of 151°, a rolling angle of less than 10°, a tensile strength of 12 MPa, and a tensile elongation at break of 220%. Even after 25 cycles of sandpaper abrasion and heating at 100°C for 1 hour, the coatings maintained their superhydrophobic properties, demonstrating excellent acid-alkali corrosion resistance and self-cleaning capability.
研究领域:
材料科学
·
表面化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Lili Wang,Huixian Dong,Keying Zheng,Nasha Zeng,Minghua Wu,Xi Wang,Huijun Li
The printing and dyeing industry is currently accelerating toward a direction of high efficiency, energy conservation, environmental protection, and integration with digitalization. Disperse dye wash-free digital inkjet dyeing is a revolutionary breakthrough for cleaning and coloring polyester fabric. Based on the solubility parameters and the hot-melt dyeing characteristics of disperse dyes, soft, hard, and functional monomers of acrylate were used as the main body. Moreover, single-vinyl fluorinated polysiloxane and divinyl polysiloxane with low solubility parameters were used as modified monomers. A modified polyacrylate (PFSMA) adhesive containing silicon in the main chain and fluorine silicon in the side chain was prepared via miniemulsion polymerization. Using disperse digital inkjet dyeing of polyester fabric without washing can realize energy saving, emission reduction, and carbon reduction. Results showed that the optimum preparation conditions of PFSMA were as follows: DVFS molecular weight of 957 g/mol and DVFS content of 2.5 wt %. Compared with that of polyacrylate (PA), the glass-transition temperature of PFSMA film decreased, and its water resistance, toughness, and adhesion enhanced. When the PFSMA content in the wash-free disperse red ink was 8 wt %, the color yields of the front and back of the PFSMA jet-dyed polyester fabric were 18.86 and 13.28, respectively. Moreover, the color yield of the front of PFSMA jet-dyed polyester fabric was 39.9% higher than that of the pure liquid disperse red jet-dyed fabric. The simulated fixation rate was 87.9%, approximately 2.9 times higher than that of the PA wash-free jet-dyed fabric. The color fastness to dry rubbing reached level 4 and the color fastness to wet rubbing reached level 3–4, which was one level higher than that of pure liquid disperse red jet-dyed fabrics. The color fastness to soaping reached grade 5 and the color fastness to heat compression reached grades 4–5 and above. The fabric was a little firmer but smoother. The color properties, color fastness, and hand feeling of the PFSMA wash-free jet-dyed polyester fabric exceeded the levels of commercially available adhesives.
研究领域:
材料科学
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纺织工程
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2020
·
IF 4.049
Zhentao Li,Zhenkun Mao,Changjun Hu,Qiaoyan Li,Zilin Chen
Fluorous affinity means remarkably specific interaction between highly organic fluorides. This work aims to explore the potential of fluoro-functionalized stationary phase for the separation of organic fluorides by means of fluorous-fluorous interaction. Here, by using the Michael addition strategy between 1H,1H,2H,2H-perfluorodecanethiol (PFDT) and polydopamine (PD), a novel fluoro-functionalized stationary phase was synthesized for open-tubular capillary electrochromatography (OT-CEC). The PFDT@PD was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray Photoelectron Spectrometer (XPS). The PFDT@PD@capillary exhibited outstanding separation performance towards neutral compounds (such as alkylbenzenes and chlorobenzenes) and organic fluorides (such as fluorobenzenes and perfluoroalkyl methacrylates etc.) with high resolution and high separation efficiency by hydrophobic interaction and fluorous-fluorous interaction. In addition, the column shows good stability and reproducibility. The relative standard deviations (RSDs) of the retention time for intra-day (n = 5) and inter-day (n = 3) runs and between columns (n = 3) are less than 0.39%, 1.22% and 3.87%, respectively. This novel type of fluoro-functionalized stationary phase represents a great application potential in organic fluorides separation field.
研究领域:
分析化学
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材料科学
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DOI
PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 25
·15177-15183
·
IF 3.361
Xiongjie Li,Ying Yang,Yiping Wang,Shuting Pang,Jingjing Shi,Xinchi Ma,Kongjun Zhu
Polymer-based dielectrics have been attracted much attention to flexible energy storage devices due to their rapid charge–discharge rate, flexibility, lightness and compactness. Nevertheless, the energy storage performance of these dielectric polymers was limited by the weak dielectric breakdown properties. Crosslinked structure has been proven efficient to enhance breakdown strength (Eb) and charge–discharge efficiency (η) of polymer film capacitors. However, crosslinked networks usually lead to low electric displacement of dielectric capacitors, which greatly restrict their energy storage density (Ud). In this work, we present a tri-layered composite via layer-by-layer casting technology, where crosslinked polyvinylidene fluoride (c-PVDF) was used as the inter-layer to offer high breakdown strength, and the outer ternary fluoropolymer layers with high dielectric constant could provide high electric displacement. The optimal tri-layered composites exhibit an ultrahigh discharge energy density of 18.3 J cm−3 and a discharge efficiency of 60.6% at 550 kV mm−1. This energy density is much higher than that of the PVDF terpolymer and commercially biaxially oriented polypropylene (BOPP, 1–2 J cm−3). The simulation results prove that the enhanced energy density originates from the effectively depressed charge transport in crosslinked structure at high applied electric field. Moreover, this work provides a feasible method for developing flexible all-organic high-energy-density composites for polymer capacitors.
研究领域:
材料科学
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能源存储
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DOI
PubMed
高影响因子
Materials Today Chemistry
·
2023
·
IF 7.3
Y. Chen,H. Xiang,X. Yang,R. Ran,W. Wang,W. Zhou,Z. Shao
As a revolutionary photovoltaic technology , organic-inorganic perovskite solar cells (PSCs) have attracted increasing interests because of rapidly boosted power conversion efficiencies (PCEs) in the last decade. Nevertheless, the typical methylammonium lead iodide (MAPbI 3 ) perovskite suffers from the inferior perovskite film quality and high defect amount, retarding the stability and PCEs. Using additives as defect passivators to effectively decrease the defect density and improve the perovskite film quality is a facile and useful method to enhance the PCEs and stability of MAPbI 3 -based PSCs . In this work, a new organic fluorine-based trifluoroethyl methacrylate (TFMA) is introduced into the perovskite precursor to effectively suppress the defect amount, enhance the perovskite film quality (larger grain sizes and fewer grain boundaries), adjust the energy level alignment, reduce the charge recombination and promote the electron extraction at the same time. By optimizing the amount of TFMA additive, the modified MAPbI 3 -based cell delivers a superior PCE of 21.0%, which is 16% higher than that of the control device (18.1%). Moreover, the addition of TFMA also significantly improves the moisture and thermal stability of MAPbI 3 -based PSCs. This work provides a simple and useful strategy for reducing defects and boosting the performance of organic-inorganic PSCs, which can facilitate the commercialization of PSCs.
研究领域:
材料科学
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光伏技术
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能源研究
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DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 15
·3166
·
IF 4.6
Ling Chen,Changying Hu,Zhiwei Wang
The rapid growth of plant-based biodegradable tableware, driven by plastic restrictions, necessitates rigorous safety assessments of potential chemical contaminants like per- and polyfluoroalkyl substances (PFASs). This study comprehensively evaluated PFAS contamination risks in commercial sugarcane pulp tableware, focusing on the residues of five target PFASs (PFOA, PFOS, PFNA, PFHxA, PFPeA) and their migration behavior under simulated use and takeout conditions. An analysis of 22 samples revealed elevated levels of total fluorine (TF: 33.7–163.6 mg/kg) exceeding the EU limit (50 mg/kg) in 31% of products. While sporadic PFOA residues surpassed the EU single compound limit (0.025 mg/kg) in 9% of samples (16.1–25.5 μg/kg), the levels of extractable organic fluorine (EOF: 4.9–17.4 mg/kg) and the low EOF/TF ratio (3.19–10.4%) indicated inorganic fluorides as the primary TF source. Critically, the migration of all target PFASs into food simulants (water, 4% acetic acid, 50% ethanol, 95% ethanol) under standardized use conditions was minimal (PFOA: 0.52–0.70 μg/kg; PFPeA: 0.54–0.63 μg/kg; others < LOQ). Even under aggressive simulated takeout scenarios (50 °C oscillation for 12 h + 12 h storage at 25 °C), PFOA migration reached only 0.99 ± 0.01 μg/kg in 95% ethanol. All migrated levels were substantially (>15-fold) below typical safety thresholds (e.g., 0.01 mg/kg). These findings demonstrate that, despite concerning residue levels in some products pointing to manufacturing contamination sources, migration during typical and even extended use scenarios poses negligible immediate consumer risk. This study underscores the need for stricter quality control targeting PFOA and inorganic fluoride inputs in sugarcane pulp tableware production.
研究领域:
环境化学
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食品安全
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材料科学
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分析化学
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高分子科学
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产品关联
DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Mengmeng Zhang,Zhihui Sui,Lijian Sun,Qi Zhang,Yikun Xu,Lihua Deng,Fang Hu
Functional thermoregulation fabrics have emerged as a significant area of research and development within the textile industry, garnering extensive attention in recent years. Herein, dodecyl alcohol/paraffin wax-styrene-acrylate emulsions (DD/PW-TiO₂/FSiWSA) were prepared using the core-shell emulsion polymerization method and used for the finishing of linen fabrics. To address the issues of low solid content, insufficient stability, and poor water resistance in water-based styrene-acrylic emulsions (WSA), nano-TiO₂ was first modified with 3-methacryloxy propyl trimethoxysilane (KH-570). Subsequently, KH-570 modified nano-TiO₂ and organic fluorosilicon were simultaneously introduced into the polymer skeleton. The structural characteristics of DD/PW-TiO₂/FSiWSA were studied. The results shows that the DD/PW-TiO₂/FSiWSA coating increases the water contact angle (WCA) of linen fabric from 0° to 131.95°, while also providing excellent stain resistance. The modified fabric has excellent anti-UV properties, and the UV protection factor is as high as 56.16. Moreover, the modified fabric exhibited excellent antibacterial activity against A. niger and S. aureus . Encouragingly, the modified fabric has excellent heat storage and temperature regulation capability, with a peak phase transition temperature of 23.6 °C, a latent heat of fusion of 25.36 J/g, and a 65.9 % increase in thermal conductivity. The coating is universal and can enhance the hydrophobicity of materials such as cotton fabrics, polyester cotton, paper, cardboard and wood, with a WCA range of 115.56° ~ 131.72°. Therefore, this multifunctional coating will lead cellulose materials towards diverse applications.
研究领域:
纺织工程
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材料科学
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高分子化学
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纳米技术
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表面工程
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产品关联
DOI
高影响因子
Communications Chemistry
·
2025
·Vol. 8
·期 1
·1-11
·
IF 6.2
Zheng Lei,Zhang Jing-Lan,Zheng Zhixin,Huang Chujie,Xie Yi-Lin,Li Xu-Bing,Fentahun Wondu Dagnaw,Wang Tieyu,Tong Qing-Xiao,Jian Jing-Xin
The recalcitrance of fluorinated organic pollutants—featuring robust Csp²-F and Csp³-F bonds—poses critical challenges to aquatic ecosystems due to their extreme persistence and bioaccumulation. Whereas current destruction strategies suffer from high energy consumption and non-selective, here we present a solar-powered mineralization strategy utilizing cerium oxide/mesoporous silica (CeO 2 /mSiO 2 ) heterojunction photocatalysts for complete defluorination of organofluorine contaminants, including fluorinated e-waste, fluoro-antibiotics and perfluorinated surfactant. Under visible light irradiation, the optimized 5%CeO 2 /mSiO 2 achieved 91.1 ± 3.2% octafluorobiphenyl (OFB) and 97.7 ± 2.8% fleroxacin (FLE) degradations within 6 h. Notably, the ‘forever chemical’ perfluorooctanesulfonic acid (PFOS) can be effectively destructed, achieving a maximum of 25.9 ± 2.7% reduction in 5 days under sunshine, outperforming parallel experiments conducted without a catalyst (~0%). This process notably avoids the evolution of fluoride ions. Theoretical calculations reveal that the removal of C-F bonds by photogenerated hydroxyl radical is thermodynamically superior to hydroxyl-mediated defluorination. This work establishes an energy-efficient paradigm for eradicating “forever chemicals” without secondary pollution, advancing sustainable water remediation technologies.
研究领域:
环境科学
·
光催化
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水修复
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材料科学
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化学污染
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可持续技术
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）