Nanomaterials
·
2024
·Vol. 14
·期 22
·1772
·
IF 4.4
Junqi He,Jing Lv,Yanan Li,Wenfang Zheng,Renming Pan
To enhance the ignition and combustion characteristics of boron (B), in this study, a suitable, energetic fluorinated group (NF2) that can improve energy and promote combustion efficiency was utilized and B/NF2composites (B/PDB) with three different particle sizes (10–20 μm, <5 μm, and 0.5–2 μm) were prepared through energetic fluorinated surface modifications with a PDB layer, a copolymer of difluoroaminomethyl-3-methylethoxybutane and 3,3′-bis(azidomethyl)oxetane, coated on the surface of B. The morphology and structure of B/PDB were characterized via the FTIR, SEM, TEM, and XPS techniques. The results indicate that all B/PDB particle sizes were successfully coated by NF2on the surfaces of B particles through the PDB layer. The TG curves in the thermal analyses were used to determine the amount of the PDB layer of B/PDB with different particle sizes. Based on the DSC curves, NF2of composites with better catalysis during ammonium perchlorate (AP) decomposition. Additionally, the effects of NF2on both B/PDB and B/PDB with AP were investigated through PY-GC/MS, ignition, and combustion. Compared with pure B, NF2significantly improved the thermal conductivity, thereby decreasing the ignition delay of B/PDB, and the ignition delay of B/PDB with AP. The combustion of B/PDB and AP was more intense, extending the combustion duration, forming volatile fluorine compounds, and increasing combustion reaction efficiency. In general, this energetic fluorinated-centred surface modification has potential applications to enhance the ignition and combustion characteristics in B.
研究领域:
材料科学
·
燃烧与推进
✓ 已验证
DOI
PubMed
高影响因子
MACROMOLECULES
·
2025
·
IF 5.2
Chenchen Zhang,Jie Liang,Yunfei Yu,Yi Zhao,Shunan Feng,Wenxiong Shi,Jianqiang Meng
High-performance desalination membranes require polymers with optimized free volume and selective transport properties. In this work, the effects of incorporating rigid monomers into zwitterionic poly(arylene ether sulfone) (PAES) membranes on water and salt transport behavior were investigated, grounded in solution-diffusion theory. Three rigid monomers, 9,9-di(4-hydroxyphenyl)fluorene (BHF), 1,1’-binaphthyl-2-phenol (BNP), and 3,6-dihydroxy-9-trifluoromethyl-9-phenylxanthene (3FR), were selected to modify polymer structure. The results demonstrate that the introduction of rigid monomers enhances the free volume and water uptake of the membranes. Notably, the 3FR-based membranes, incorporating both rigid twisted structures and fluorinated groups, exhibited a synergistic effect, significantly improving water diffusion while suppressing salt diffusion. The presence of fluorine atoms in 3FR created stable hydrophobic channels, which not only facilitated rapid water transport but also effectively hindered salt permeation, resulting in superior water/salt selectivity. The study reveals that the combination of rigid and fluorinated structures provides a promising strategy for designing high-performance desalination membranes.
研究领域:
高分子材料
·
膜科学与技术
·
分离科学
·
水处理工程
·
功能高分子
·
渗透扩散理论
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zihua Wang,Chijia Wang,Weihao Fan,Shuyi Liu,Kaka Li,Hongxin Luo,Shupei Liu,Huaiyuan Wang
A robust bifunctional platform (FA-PANI-Fe-F) with both shielding performance and corrosion inhibition activity was prepared and observed for its structure and morphology. During the corrosion test , Fe 2+ /Fe 3+ and perfluorinated groups effectively strengthened the shielding performance and corrosion inhibition activity of the coating. The results show that the perfluorinated group not only improved the hydrophobic performance of the functional filler but also provided effective inhibition against corrosion for the anode area. In addition, Fe 2+ /Fe 3+ resulted in the functional filler exhibiting anodic protection and cathodic inhibition properties, thereby forming a dense metal passivation film between the coating and the substrate interface. After the EIS test, the |Z| 0.01 Hz value of FPF-Fe 10% C still reached 7.91 × 10 8 Ω·cm 2 . Additionally, the FPF-Fe 10% C showed a lower cathodic corrosion trend in the SVET test, which indicated that Fe 2+ /Fe 3+ effectively inhibited the corrosion process in the cathode region. This study is expected to open new insights into the anti-corrosion inhibition process between the interior of the coating and the metal substrate, and prepare a robust bifunctional filler platform with long-term corrosion resistance .
研究领域:
材料科学
·
腐蚀工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2025
·
IF 20.2
Nan Zhang,Wenbo Li,Ying Liu,Shiyuan Zhang,Hong Teng,Aotian Zhang,Tianzong Ma,Minghang Zhang,Zhentong Kong,Zhengyu Zhang,Haiming Xie,Liqun Sun
Combining lithium (Li) metal anode with nickel-rich (LiNi x Co y Mn 1− x −y O 2 , NCM) cathode promises high energy density batteries. Nevertheless, lithium metal batteries (LMBs) still face critical challenges in overall safety and electrode-electrolyte interfacial stability. Herein, we design and synthesize a quasi-solid polymer electrolyte (QSPE) integrating essential isocyanate ( N = C = O ) and fluorinated (C-F) groups, with dual interfacial compatibility and multi-tiered protection strategy. The polymer chain units of smart amphiphilic QSPE (HIET) exhibits lower values for both the Lowest Unoccupied Molecular Orbital (LUMO) and Highest Occupied Molecular Orbital (HOMO) than TEGDME, resulting in an excellent Li passivation layer and high oxidation resistance. QSPE's safety performance is enhanced by the synergistic action of residual C = C bonds, crosslinked N = C = O groups, and flame-retardant CF 3 groups, providing protection across difference temperature ranges and overall safety against thermal runaway and other hazards. A Li/HIET/Li cell can be stably cycled for 2200 h with the decomposition voltage of HIET extending to 5 V. Additionally, the retention rate of NCM622/HIET/Li is as high as 95% after 200 cycles at 1C. Such hierarchical design principles provide actionable insights for advancing next generation QSPE materials toward practical LMB applications.
研究领域:
材料科学
·
储能
·
电化学
·
聚合物化学
·
电池技术
✓ 已验证
DOI
高影响因子
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