INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Xiaofei Shen,Shenjie Han,Zhongrun Xiang,Yutong Lu,Hao Qian,Longxiang Tang,Huiqing Wang,Yun Lu
The demand for surface antibioadhesion of wood, the most widely used material for interiors, has increased due to health concerns. For achieving antibioadhesion, the surface energy of wood materials must be reduced and their micro/nanostructure roughness must be increased. Inspired by lotus leaves, poly(pentafluorophenyl isocyanide) (PFPI)-grafted wood (wood-g-PFPI) with micro/nanostructure roughness and low surface energy was developed by grafting PFPI into the wood structure at the molecular level via thiol–ene click chemistry. The chemical structure, morphology, and water contact angle of wood-g-PFPI were characterized via Fourier transform infrared spectroscopy , solid-state 13 C nuclear magnetic resonance spectroscopy , scanning electron microscopy , X-ray photoelectron spectroscopy, and contact angle measurements. Wood-g-PFPI 10 exhibited excellent hydrophobicity (162°), antibacterial adhesion ( Staphylococcus aureus and Escherichia coli) , antifriction as well as self-cleaning properties, and biocompatibility owing to the increased surface roughness of the ring helical structure of the grafted PFPI. This method makes full use of the molecular characteristics of wood, so it can also be transferred to all the cellulosic substrates, such as fabric, paper and so on. Regardless of the size and space constraints of the substrate, this modification method has the potential for antibioadhesion and other applications of helical polymers.
研究领域:
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Lucheng Li,Meiling Liu,Peng Yang,Wenfeng Yuan,Jun Chen
Broadening the charging and discharging voltage window of high nickel cathode material NCM811 is the most expected method to improve the high specific energy density of batteries currently, yet the cathode-electrolyte interface (CEI) formed by the oxidized and decomposed products of carbonate-based electrolyte under high voltage are always so unsatisfied. Therefore, a voltage-stabilizer, TPFPB (Tris(pentafluoro)phenylborane), added into baseline electrolyte (1 M LiPF 6 in EC:EMC:DMC=1:1:1 vol%) to promote the electrochemical performance of the battery at 4.5 V. The results interpret that the TPFPB-contained NCM811-Li half-cells exhibit high specific capacity (167.10 mAh/g), excellent capacity retention rate (CRR) (75.37 %), and high rate performance (173.3 mAh/g at 5C) during 4.5 V. Meanwhile, through the analysis of the physical characterization techniques. the B- and F-rich interfacial layer, named as CEI film, existing at the interface between the cathode and the electrolyte, produced under 4.5 V, is superior, resulting in impeding the structural collapse of the cathode material and the continued dissolution of transition metal ions (TM n + ) from the cathode material, as well as, ameliorate the electrochemical polarization of the battery, ultimately, it can stabilize the electrochemical performance of the battery under high voltage. Therein, the present work elucidate a new and substantial approach to enhance the high-voltage performances of rich-Ni cathode materials.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2014
·Vol. 5
·期 16
·4726-4733
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IF 5.368
Jinbao Xu,Junzhe Song,Stergios Pispas,Guangzhao Zhang
Narrowly distributed poly(ε-caprolactone) (PCL) was synthesized by the ring-opening polymerization (ROP) of ε-caprolactone (CL) using tris(pentafluorophenyl)borane (B(C6F5)3) as an acidic catalyst and benzyl alcohol (BnOH) as the initiator in bulk at 80 °C. The use of functional initiators such as 2-hydroxyethyl methacrylate (HEMA), propargyl alcohol (PGA), 6-azido-1-hexanol (AHA) and methoxy poly(ethylene glycol) (mPEG) leads to end-functionalized PCLs. 1H NMR, SEC and MALDI-TOF MS measurements clearly indicate the presence of an initiator residue at the chain end of the obtained PCL homopolymers. The study on polymerization kinetics confirms the controlled/living nature of the B(C6F5)3-catalyzed ROP of CL. Accordingly, the block copolymerization of CL with δ-valerolactone (VL) and trimethylene carbonate (TMC) successfully proceeded to give PCL-b-PVL and PCL-b-PTMC copolymers. Macrocyclic PCL was also prepared by the intramolecular click reaction of the heterotelechelic α-azido,ω-ethynyl-PCL.
研究领域:
高分子化学
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材料科学
✓ 已验证
DOI
高影响因子
Science Advances
·
2021
·Vol. 7
·期 45
·
IF 14.143
Keyi Chen,Meng Lei,Zhenguo Yao,Yongjian Zheng,Jiulin Hu,Chuanzhong Lai,Chilin Li
Conversion-type iron fluoride is a promising alternative cathode to intercalation oxides because of its higher energy density. However, its intrinsic solid-solid conversion is sluggish during repeated splitting and rebonding of metal-fluorine moieties. Here, we propose a solid-liquid conversion mechanism to activate the fluorine transport kinetics of iron oxyfluorides enabled by fluoride anion receptor of tris(pentafluorophenyl)borane (TPFPB). TPFPB promotes the dissociation of inert lithium fluoride and provides a facile fluorine transport channel at multiphase interfaces via the formation of solvated F− intermediate therein. The construction of solid-liquid channel with fluorinated cathode electrolyte interface is the key for the achievement of FeO0.3F1.7 and FeO0.7F1.3 in terms of sustaining conversion reaction (with an energy efficiency approaching 80%) and high-rate performance (with reversible capacity of 320 mAh/g at 2 A/g). The cathode energy densities can reach 1100 Wh/kg for FeO0.3F1.7 and 700 Wh/kg for FeO0.7F1.3 under the power densities of 220 and 4300 W/kg, respectively.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Asian Journal of Organic Chemistry
·
2020
·Vol. 9
·期 7
·1076-1080
·
IF 3.13
Siyu Wu,Gengwen Yin,Caihong Cheng,Bo Liang,Haiquan Zhang
Graphical A new product -PDMBPRI-4F was synthesized by one-step method, which has the special property of fluorescence quenching caused by intramolecular charge transfer. Nucleophilic substitution process with loss of one fluorine atom was observed when pentafluorophenyl substituted benzo[ghi]perylene triimide and perylene diimide were heated in N , N -dimethylformamide, in which N , N -dimethylformamide acted both as solvent and nucleophile reagent. Unexpectedly, the obtained product exhibited significant intramolecular charge transfer optical properties in solutions. The mechanism of nucleophilic substitution and the influence of substituent were further studied and proposed in this manuscript.
研究领域:
有机化学
·
材料科学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Hong Yue Wu,Qian Yang,Xue Lang Gao,Zhao Yu Zhu,Qi Hui Sun,Qiu Gen Zhang,Ai Mei Zhu,Qing Lin Liu
To enhance the performance of anion exchange membranes (AEMs) by constructing effective ion channels, we synthesized novel aliphatic polymers with pentafluorophenyl pendent groups via superacid catalyzed polyhydroxyalkylation and quaternization by grafting multi-cation crosslinker through the Menshutkin reaction . The procedure adopted in this study for preparing the AEMs circumvented the utilization of precious metal catalysts and made it easy to control the reaction conditions. Compared with the traditional aliphatic AEMs, the AEMs prepared by the new strategy exhibited well-developed microphase-separated structures by increasing the hydrophilic/hydrophobic difference between the polymer backbones and the side chains. Moreover, the multi-cation crosslinker not only provides ion exchange groups but also constrains the swelling of the AEMs. As we expected, the well-defined ion channels were validated by transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS). The CPFBP-TQA-100 membrane shows a highest ion conductivity of 76.85 mS cm −1 and a swelling ratio of only 24.8% at 80 °C. A maximum power density of 116.7 mW cm −2 is achieved by a single cell using the CPFBP-TQA-100 membrane at a current density of 300 mA cm −2 at 80 °C. Besides, all the AEMs display excellent thermal stability and reasonable alkaline stability.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Xianshao Zou,Tingting Pan,Jiapei Jiang,Gang Li,Cheng Song,Ruofan Sun,Ziyun Yang,Dazhi Sun,Chunhui Hou,Meiwan Chen,Yanqing Tian
A graft copolymer composed of poly( ε -caprolactone) as a hydrophobic chain and poly( N -(2-hydroxypropyl)methacrylamide) as a hydrophilic segment with an internal reference probe for oxygen sensing was prepared. Highly efficient platinum(II)meso-tetra(pentafluorophenyl)porphine (PtTFPP) was used as a typical oxygen probe. Although PtTFPP was highly efficient, it is hydrophobic, limiting its direct application for oxygen sensing in biological conditions. By using the amphiphilic graft copolymer, PTTFPP was successfully incorporated into the micelles formed by this polymer to not only enable the application of PtTFPP for biosensing in medium but also retain its high efficiency. The quantum efficiency of PtTFPP in the micelle solution under nitrogen can reach as high as 0.20. The PtTFPP-containing micelles were tested for high throughput cell respiration and bacteria detection. The influence of an antibiotic, antimycin as a representative example, on cell respiration was also studied. For achieving high accurate sensing, an internal built-in reference probe with aggregation induced emission properties were also polymerized in the graft copolymer. This study demonstrated that the graft polymer approach is a good way to enable highly efficient and hydrophobic oxygen probes for biosensing.
研究领域:
生物材料学
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2023
·Vol. 61
·期 14
·1486-1494
·
IF 3.4
Chenqi Zhao,Penghua Yan,Ruofan Liu,Wei Li,Yushun Jin,Qisong shi,Yibo Wu
The cationic polymerization of isobutene vinyl ether(IBVE) contains waters system was achieved by using triphenylmethylium tetrakis-(pentafluorophenyl)borate [Ph 3 C][B(C 6 F 5 ) 4 ], which overcame the harsh experimental requirements of traditional cationic polymerization. The influences of water content, solvent polarity, and reaction temperature on polymerization were studied. The end structure of the polymer was analyzed by 1 H-NMR. Combined with the effect of the proton trapping agent and triethylamine salt which can trap [H + ], it was found that there was a reversible equilibrium between [Ph 3 C + ] and [H + ] active species during the polymerization process. The cationic polymerizations of isobutyl vinyl ether were initiated by these two active species simultaneously. The controllable cationic polymerization of isobutyl vinyl ether was achieved by the addition of ethyl methyl carbonate and ethyl benzoate. Gaussian 09 W simulation confirms the polymerization mechanism. Graphical
研究领域:
高分子化学
·
有机化学
✓ 已验证
DOI
高影响因子
ORGANIC ELECTRONICS
·
2020
·
IF 3.31
Min Yang,Qin Zhang,Wenjing Zhang,Zhongqi Hao,Yuancheng Qin,Xia Hai,Fangfang Li,Dan Zhou,Yubao Zhang
Improving the hole carrier mobility of organic hole-transporting materials is critical for the development of advanced quantum dot light-emitting diodes (QLEDs). Here, a simple method is reported for enhancing the hole-charge mobility in poly(9-vinylcarbazole), PVK. Doping of the PVK using the molecular Lewis acid tris(pentafluorophenyl)borane as a dopant is shown to have a powerful effect on the hole-charge mobility, and the performance of the QLEDs. By adjusting the amount of dopant, the p-type Hall mobility can be increased up to 3.3-fold, and thereby, the external quantum efficiency and current efficiency of QLEDs are improved by 132% and 249%, respectively.
研究领域:
材料科学
·
电气工程
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2025
·
IF 8.6
Yilian Song,Haoran Li,Kang Dong,Youjun Xing,Minghui Zhang,Mingzhu Yang,Xiang Huang,Wei Liu,Yongcheng Jin
The pursuit of high-voltage nickel-based layered terminal oxide materials (NCM) has gained significant research momentum owing to their compelling combination of cost-effectiveness and high energy density. However, critical challenges persist in mitigating parasitic interfacial reactions, electrolyte oxidative decomposition, and structural degradation mechanisms under elevated operating voltages (>4.3 V vs. Li/Li + ). Here, we propose a synergistic dual-additive electrolyte strategy by adding tris(pentafluorophenyl)borane (TPFPB) and lithium difluoro(oxalato)borate (LiDFOB) to a conventional carbonate-based electrolyte, aiming to enhance the performance of high-voltage LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622). Theoretical and experimental analyses show that LiDFOB reduces harmful side products (e.g., HF, PF 5 ) by inhibiting LiPF 6 decomposition, while TPFPB's rigid structure promotes a uniform and dense cathode electrolyte interface (CEI) film on the cathode. The two additives work synergistically to enabling the Li/NCM622 half-cells to maintain a capacity retention of up to 76.8 % after 500 cycles at 1C under 4.5 V high voltage, while the cell prepared with an electrolyte without any additives only retained 7.6 % capacity after cycling. The synergistic strategy employing TPFPB and LiDFOB to enhance the high-voltage cycling stability provides a promising practical feasibility of high-voltage batteries for industrial application.
研究领域:
电化学
·
能源材料
·
锂离子电池
·
表面与界面工程
·
电解液化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）