Polymers
·
2021
·Vol. 13
·期 20
·3489
·
IF 4.329
Yashu He,Jingting Wang,Igor S. Sirotin,Vyacheslav V. Kireev,Jianxin Mu
This study reports on a series of crosslinked poly(arylene ether)s with POSS in the main chain. The fluorinated and terminated poly(arylene ether)s were first synthesized by the nucleophilic reaction of diphenol POSS and decafluorodiphenyl monomers, including decafluorobiphenyl, decaflurobenzophenone, and decafluorodiphenyl sulfone. They were then reacted with 3-hydroxyphenyl acetylene to produce phenylacetylene-terminated poly(arylene ether)s. The polymers were of excellent processability. When heated to a high temperature, the polymers converted into a crosslinked network, exhibiting a low range of dielectric constant from 2.17 to 2.58 at 1 HMz, strong resistance against chemical solutions, low dielectric losses, and good thermal and hydrophobic properties.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Mengting Wang,Han Ye,Xiongkai Zheng,Siyuan Chen,Huanhuan Xing,Xueqin Tao,Zhi Dang,Guining Lu
Cadmium (Cd 2+ ) and fluoride (F - ) are frequently detected simultaneously in wastewater. Simultaneous removal of Cd 2+ and F - in wastewater is urgent. In this study, bovine bone meal (BBM), mainly consisted of hydroxyapatite , was used as a green adsorbent for Cd 2+ and F - adsorption in single and binary solutions. The results showed that with the increase of pH, the uptake ability of BBM towards Cd 2+ and F - showed an upward and downward trend, respectively, suggesting that electrostatic interaction was an important mechanism. Cl - and NO 3 - had little effect on Cd 2+ and F - adsorption, while H 2 PO 4 - enhanced adsorption capacities. The kinetic data of Cd 2+ and F - removal were successfully described by pseudo-second order model. The maximum adsorption capacity (q m ) of Cd 2+ obtained from the Langmuir model was 78.969 mg/g. The adsorption isotherm of F - was consistent with S-type and satisfied with the Brunauer, Emmett, and Teller (BET) model. In the binary system, F - slightly decreased the adsorption capacity of BBM on Cd 2+ , while Cd 2+ increased the adsorption capacity of BBM on high-concentration F - from 38.724 to 86.966 mg/g. This study provides a cost-effective and environmentally friendly method for separate and simultaneous removals of Cd 2+ and F - from water, which provides a practicable way for the treatment of cadmium-fluorine wastewater and resource utilization of bovine bone.
研究领域:
环境科学
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废水处理
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产品关联
DOI
高影响因子
Science China-Chemistry
·
2025
·Vol. 68
·期 7
·3078-3085
·
IF 9.7
Wang Xingxing,Zhao Kun,Wu Hao,Li Pu,Feng Wenfang,Armand Michel,Zhou Zhibin,Zhang Heng
Lithium carbon fluoride (Li°∥CF x ) batteries are the research hotspot amid the existing primary battery technologies, owing to their inherent safety and exceptionally theoretical energy density. From the perspective of bimolecular nucleophilic substitution (S N 2) reactions for the conversion process of CF x electrode, we herein delve into the impact of borane-type Lewis acid additive, as lithium fluoride (LiF) carrier, on their discharge behavior of the Li°∥CF x cells, utilizing two families of electrolytes with different electron-donicity, namely 1,2-dimethoxyethane (DME) and propylene carbonate (PC). The results show that the DME-based electrolytes empower the Li°∥CF x cells with higher specific capacities vs. the corresponding PC-based systems, irrespective of the borane-type Lewis acid additive concentration. This highlights the central impact of electrolyte solvents ( i.e. , donicity) on determining the discharge processes of CF x electrodes. Furthermore, for the DME-based electrolytes, the addition of a few percent (0.4 wt%) of borane-type additive leads to a significant improvement in the discharge capacity, demonstrating the necessity of carrying deposited LiF particles for the electrolytes with relatively high donicity. This work provides an explicit design concept concerning the optimization of the electrolyte configurations for further improving the electrochemical performance of Li°∥CF x and related battery systems.
研究领域:
电化学
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能源材料
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电池技术
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无机化学
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功能材料
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产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 4
·1-14
·
IF 21.8
Hou Xudong,Zhang Minghao,Yao Qifa,Ren Yeping,Zhong Lin,Li Changlin,Lv Haohao,Chen Hanyu,Wei Zuting,Yang Fanzhi,Yang Wei,Xia Min,Luo Yunjun
High sensitivity of energetic oxidizers and difficulties in activating passivated aluminum during the ignition are two serious obstacles for safe and efficient application of aluminized explosives. Herein, a safe and highly reactive HMX@PDA@FG (HPF) dual-shell oxidizer was constructed through functionalizing octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) core with a bio-enhanced interface polydopamine (PDA) and a two-dimensional (2D) fluorine source fluorinated graphene (FG) via bionic and self-assembly strategies. The synergistic integration of FG and PDA coatings achieves a remarkable reduction in HMX sensitivity (the impact energy increase from 7 to 28 J and friction load weight increase from 108 to 160 N). The 2D structure of FG notably enhances heat transfer within the system and leads to more rapid and concentrated decomposition of HMX. Furthermore, HPF oxidizers feature significant combustive activation effects for nano-aluminum due to high fluorine content of FG. Aluminized mixture HPF-10/n-Al exhibits superior combustion reactivity and energy output. The combustion heat of HPF-10/n-Al reaches 14,770.8 kJ/g, nearly 1000 kJ/g higher than HMX/n-Al, while the peak pressure and pressurization rate are approximately 1.5 and 4.9 times higher than HMX/n-Al. Hence, modifying multifunctional fluorinated graphene coating and bioinspired interface polydopamine on HMX shows great potential in enhancing both safety and energetic performance of aluminized explosives. Graphical abstract
研究领域:
含能材料
·
爆炸工程
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材料科学
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表面工程
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燃烧化学
✓ 已验证
产品关联
DOI
高影响因子
JOM
·
2019
·Vol. 72
·期 1
·239-246
·
IF 2.305
Peng Jianping,Wei Zheng,Di Yuezhong,Wang Yaowu,Sun Ting
NaF-KF-LiF-AlF 3 -based low-temperature electrolytes have attracted great interest because of their potential to optimize and improve current industrial aluminum production methods. In the present study, the saturated alumina solubility in quaternary NaF-KF-LiF-AlF 3 -based melts (total cryolite molar ratio \( {\text{CR}} = \left( {n_{\text{NaF}} + n_{\text{KF}} + n_{\text{LiF}} } \right)/n_{{{\text{AlF}}_{3} }} \) of 1.3) with both KF and LiF content of 0 mol.% to 20 mol.% were evaluated by measuring the weight loss of a rotating corundum disk over the temperature range of 800–920°C. The effects of the KF content, LiF content, and temperature on alumina solubility are discussed in detail. The results fit well with the following empirical equation within the temperature of 830–890°C: ω (Al 2 O 3 ) sat = A × ( t /1000) B , where A = 0.3101[KF] − 0.1254[LiF] − 0.0057[KF] 2 + 0.0028[LiF] 2 + 4.486, B = 0.3839[KF] + 0.0368[LiF] − 0.0140[KF] 2 + 0.0057[LiF] 2 + 4.913, and t is the temperature in Celsius. Alumina solubility diagrams at various temperatures are illustrated based on the empirical regression equation obtained. Finally, some problems and challenges preventing the application of these low-temperature melts in industry are discussed.
研究领域:
冶金学
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材料科学
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产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 3
·1658-1665
·
IF 3.119
Pengfei Shuai,Dan Yang,Libing Liao,Qingfeng Guo,Lefu Mei,Yidi Zhang,Haikun Liu
Cryolite is a suitable host for up-conversion luminescent materials due to its low phonon energy and good optical transparency. In this work, a novel up-conversion material K3YF6:Yb3+, Er3+ with a cryolite structure was prepared successfully by a solid state method. The crystal structure, morphology, composition and up-conversion luminescence properties of the as-prepared sample were characterized by X-ray diffractometry (XRD), field emission scanning electron microscopy (SEM) and fluorescence spectrometer in detail. K3YF6:Er3+, Yb3+ has a cryolite structure. Under 980 nm excitation, the as-prepared sample can generate slight green emission at 524 and 546 nm (attributed to 2H11/2 → 4I15/2 transition, 4S3/2→4I15/2 transition of Er3+) and strong red emission at 661 and 672 nm (corresponding to 4F9/2 → 4I15/2 transition, 4I9/2 → 4I15/2 transition of Er3+). All the green and red up-conversion emission of K3YF6:Er3+, Yb3+ transfer and electronic transition process of the red and green light the sample emitted, the possible luminescence mechanism is discussed in this paper.
研究领域:
材料科学
·
光学
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DOI
高影响因子
Nano Select
·
2021
·
IF 0
Chenglong Mu,Xiaodan Sun,Kai Yan
Phototherapy is gradually becoming a primary technique for treating tumors due to increased efficacy and less side effects. It largely depends on the photosensitizers. Nevertheless, most of photosensitizers show poor stability, how to encapsulate or load them, especially multiple ones, for effective delivery is of paramount importance. To address the challenge, a hyperbranched polymer was prepared by a reversible addition-fragmentation chain transfer polymerization, which is composed of 2,2,3,3-Tetrafluoropropyl methacrylate (TFPMA), bis(2-methacryloyl)oxyethyl disulfide (DSDMA) and poly(oligo ethylene glycol) methyl ether methacrylate (PEGMA). Benefiting from hydrophobic performance of fluorinated segments, this hyperbranched polymers can load hydrophobic IR780 (9%) and Ce6 (12%) due to self-assembly and hydrophobic-hydrophobic interaction. The final formed composite micelles showed good water dispersity, well biocompatibility, and strong stability. Remarkably, they had good photodynamic and photothemal abilities, enabling them to synergistically induce tumor cell apoptosis by oxidative damage and thermal ablation. This work offers a promising composites and strategy for loading photosensitizers stably and effectively towards cancer therapy.
研究领域:
生物医学工程
·
药剂学
·
肿瘤学
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DOI
DESALINATION
·
2024
·
IF 8.3
Lei Huang,Lei Sheng,Kuilin Wan,Meicong Wang,Hongguo Zhang,Jia Yan,Yonghui Liu,Sikpaam Issaka Alhassan,Yongsheng Chen,Samuel Raj Babu Arulmani
Fluoride is a common pollutant from nature, normal life, and production. Adsorption, electro-adsorption, and precipitation are dominant mechanisms corresponding to the adsorption and electro-adsorption technologies for removing fluoride. This paper presents Ti 3 AlC 2 as an effective reagent for removing fluoride under acidic conditions. The adsorption mechanisms of adsorption and electro-adsorption were compared to sedimentation at pH 2 and 1, leading to a higher removal rate of adsorption by pH 2 than at pH 1. The adsorptive behavior of Ti 3 AlC 2 with fluoride includes both multilayer sorption and chemisorption. Furthermore, the precipitation reaction induced a partial change of Ti 3 AlC 2 to MXene. Notably, electro-adsorption was more effective rather than sedimentation at pH 1 in capacitive deionization technology. The Al adsorption sites made it easier to combine fluoride than Ti, and aluminum fluoride was easier to produce than titanium (III) fluoride. These adsorption and electro-adsorption experiments were carried out to elucidate and delineate the performance of Ti 3 AlC 2 for removing fluoride. A molecular model of Ti 3 AlC 2 was also built to calculate adsorption using the density functional theory. Hence, the Ti 3 AlC 2 molecular model combined with XPS and other characterizations of materials provided an effective, easy-to-understand combinative mechanism for removing fluoride.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2023
·
IF 2.8
Yanhui Zhang,Yun Yang,Xifa Long,Hualing Tian,Xiaofeng Gu,Zhi Su
A new alkali/alkali-earth metal pyrophosphate fluoride Na 2 Mg 2 P 2 O 7 F 2 without the structural disorder in the cuspidine family has been successfully prepared in the sealed system. Na 2 Mg 2 P 2 O 7 F 2 crystallizes in the space group P 2 1 / c (No. 14) of the monoclinic crystal system . The structure of Na 2 Mg 2 P 2 O 7 F 2 is shown to be an intricate three-dimensional (3D) framework that consists of the 2D layers [Mg 4 O 12 F 2 ] ∞ and the 1D chain [Na 2 O 8 F 3 ] ∞ interlinked by isolated P 2 O 7 groups, which demonstrates the precise coordination environment of cations and the framework in inorganic alkali/alkaline earth metal pyrophosphate fluoride. By comparing with other phosphate structures, we found that the introduction of F is conducive to the consistent arrangement of anionic group P 2 O 7 and enriches the diversity of cationic polyhedra. In addition, first-principle theoretical studies were also carried out to aid the understanding of microstructures, and Na 2 Mg 2 P 2 O 7 F 2 possesses a large band gap (7.1 eV) and has potential applications in the deep ultraviolet region.
研究领域:
材料科学
·
无机化学
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产品关联
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2025
·
IF 8.9
Bin Wang,Qingqing Zhou,Junjie Lu,Chuyang Li,Mengmeng Fan,Wenwei Ding,Bifu Sheng,Wenjuan Zhu,Qian Ni,Huixin Chen,Xiang Han
Poly(vinylidene fluoride- co -hexafluoropropylene) (PVDF-HFP)-based solid polymer electrolytes show great potential for high energy lithium metal batteries, however, the residual solvent and related severe side reactions limit its development. Herein, a PVDF-HFP-based solid polymer electrolyte modified by fluorobenzene (FB) co-solvent is designed to address these problems. The introduced FB with weak solvation interaction regulates the coordination environment and induces anions to enter the solvation structure, generating more contact ion pairs (CIPs) and aggregates (AGGs). In addition, the anions-derived LiF-rich interphases help to improve the interface stability against Li metal. As a result, the FB-PVDF-HFP achieves high ionic conductivity (4.1 × 10 −4 S/cm) and low activation energy (0.125 eV) at room temperature. In addition, Li||Li symmetric cells using FB-PVDF-HFP electrolyte can achieve uniform and dendrite-free lithium deposition/stripping in the long-term cycling over 2300 h. The assembled solid-state Li|FB-PVDF-HFP|LFP full cell shows improved rate performance and cycling performance (600 cycles at 0.5 C and 450 cycles at 3 C) at room temperature. This work verifies the feasibility of fluorinated terminated solid polymer electrolytes on its lithium-ion transport and interfacial stability in lithium metal batteries.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yuejiao Yang,Xitian Peng,Guiyou Chen,Huaming Xiao,Qiongwei Yu
Perfluorinated compounds (PFCs) are persistent in urban water systems, threatening the safety of drinking water and aquatic food chains. In this study, fluorinated loofah sponge (FLS) was prepared for selective solid-phase extraction (SPE) and liquid chromatography-tandem mass spectrometry (LC-MS/MS) determination of 16 PFCs in urban water. The limits of detection (LODs) and limits of quantification (LOQs) of the established method (FLS-based SPE-LC-MS/MS) were 0.006–5 ng/mL and 0.01–10 ng/mL, respectively. This method exhibited a desirable precision with relative standard deviations (RSDs) less than 8.83 % and recoveries in the range of 85.4 %–107.2 %. Finally, this method was successfully applied to investigate the distribution of 16 PFCs in real urban water samples (such as tap water, bottled water, and lake water) collected in Wuhan, China, which enables sensitive dynamic monitoring of PFC migration in urban water networks and identification of potential sources so as to safeguard drinking water quality against emerging PFC contamination.
研究领域:
环境分析化学
·
环境污染与控制
·
水质安全
·
分析化学
·
环境健康
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2023
·Vol. 31
·期 1
·643-659
·
IF 5.7
Cai Lu,Lv Cun,Yan Xinyue,Mao Haiyan,Zhou Tianchi,He Xuemei,Zhu Tianxue
Fluorinated compounds with side-chains longer than six carbon have been banned due to their toxicity to environment, organisms and human, so that attentions have been paid on degradable short-chain fluorinated or non-fluorinated materials. Here in this paper, several novel short-chain fluorinated polysiloxanes with multi-functions were synthesized successfully and applied on cotton fabrics. Chemical structure of these fluorinated polysiloxanes were characterized by Fourier-transform infrared spectrum and nuclear magnetic resonance. Liquid repellency, washing durability, thermal stability, fabric style and color deepening of treated cotton fabrics were investigated. Additionally, the effect of benzoyl spacer on the surface wettability was fully studied. Results demonstrate that FPAPS-20@cotton (cotton fabric treated by fluorinated polysiloxane with 20% fluorine content) exhibits the greatest liquid repellency as the contact angles for water, ethylene glycol, glycerol and octane are 150.1°, 132.3°, 138.1° and 105.5°. Moreover, the benzoyl spacer plays a positive role in the durable wettability of FPAPS-20@cotton, resulting in the water contact angles ranging from 150.1° to 146.0° when FPAPS-20@cotton exposes to the water droplet for 20 min. X-ray photoelectron spectroscopy provides the experimental evidence for this result. On the other hand, thermal-gravimetric analysis confirms that the fluoroalkyl segments of the fluorinated polysiloxanes can decelerate the thermal decomposition of cotton fabrics. Moreover, compared with the untreated dyed cotton fabric, the K/S values of cotton fabrics with navy, red and orange color treated with FPAPS-20 increase by 42.61%, 11.00% and 18.18%, respectively.
研究领域:
高分子化学
·
纺织科学
·
表面工程
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）