Advanced Materials Interfaces
·
2021
·Vol. 8
·期 24
·2100458
·
IF 6.147
Xiaoyan Song,Zhen Wang,Fangzheng Zhao,Yizhe Sun,Bowen Cheng,Jinfeng Xing
In this study, a polyimide/aminopropyllsobutyl polyhedral oligomeric silsesquioxane (PI/A-POSS) membrane with a novel 3D thermal crosslinking structure is prepared by electrospinning and subsequent imidization. Compared with the pure PI membrane, PI/A-POSS composite membranes present better mechanical properties, narrower distribution of pore size, smaller average pore size, and better thermal stability. When A-POSS content is 3 wt%, the composite membrane (A3) has outstanding electrolyte uptake, excellent ionic conductivity, low interfacial resistance, and the high electrochemical stability of anode. The battery assembled with the A3 separator has an excellent first discharge capacity of 137.8 mAh g −1 and its capacity retention rate is still as high as 76.49% after 100 cycles at 2.0 C. Furthermore, battery assembled with the A3 separator shows excellent rate capacity with a relatively high discharge capacity up to 169.7 mAh g −1 at 0.2 C and a superior capacity recovery rate of 98.06% at 30 °C. Especially, the battery assembled with the A3 separator shows more prominent rate capacity with an excellent first discharge capacity up to 180.5 mAh g −1 at 0.2 C and a superior capacity recovery rate of 95.79% at 60 °C.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Liping Jin,Chenpeng Ji,Shun Chen,Kun Qian,Lingxin He,Wei Wang,Wenwen Guo
Two-dimensional (2D) nanosheet materials (MXenes) have unparalleled advantages in the field of flame-retardant multifunctional composites, but their dispersibility, flame retardancy and compatibility with the matrix are poor and need to be enhanced. In this research, we employed interfacial decoration and grafting modification to firstly introduce proanthocyanidins (PCs) onto MXenes surface (forming PC-MXenes) to increase the number of available active sites. On this basis, phosphorylated A-POSS was grafted onto PC-MXene (resulting in PAP@P-MXene) via a one-pot method, organic–inorganic hybrid flame-retardant PAP@P-MXene nano-coatings were subsequently constructed on the surface of cotton fabrics via an immersion method, and their structure-property relationships were verified. Thermogravimetric analysis (TGA) results revealed that PAP@P-MXene displayed a high char residue content of 32.0 % at 800 °C, illustrating its pretty good fire-safety properties. Typically, the residual char amount of coated cotton fabric with 12 wt% PAP@P-MXene (C-PAP@P-MXene-3) under a N 2 atmosphere was as high as 37.1 %. Additionally, the limiting oxygen index (LOI) increased to 31 %, while the peak heat release decreased by 79.83 %. C-PAP@P-MXene-3 also displayed a UL-94 V-0 rating and self-extinguishing ability, all of which demonstrated excellent fire safety performance. The unique 2D nanosheet structure of MXenes, along with their innovative structural design and synergistic flame-retardant strategy, endows the nanomaterials with good dispersibility and flame-retardant effects, which has led to the development of new flame-retardant strategies and expanded the potential applications of MXene materials.
研究领域:
材料科学
·
纺织工程
·
化学工程
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产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2019
·Vol. 25
·期 52
·12098-12104
·
IF 5.16
Tianyu Shan,Liang Gao,Xiaoqian Tong,Qinqing Du,Zhihang An,Huiwen He,Jiaping Lin,Si Chen,Xu Wang
An amazing phenomenon of the relative magnitude of modulus of two liquid-crystal (LC) gels is found inverted under/above their phase transition temperature T LC-iso , which is further proved to be caused by their diverse morphology flexibility. By testing the polarity of two LCs, gelator POSS-G1-Boc (POSS=polyhedral oligomeric silsesquioxane) was discovered to self-assemble into more flexible structures in a relatively low polar LC, whereas more rigid ones are formed in higher polar LC. Hence, a fitting function to connect morphology flexibility with solvent polarity was established, which can even be generalized to a number of common solvents. Experimental observations and coarse-grained molecular dynamics simulations revealed that solvent polarity mirrors a “Morse code”, with each “code” corresponding to a specific morphology flexibility. Graphical Decoding morphology : With the help of the “Decoding software 2019”, the special “Morse code” of solvent polarity can be translated into morphology flexibility of liquid-crystal (LC) gels (see figure).
研究领域:
超分子化学
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材料科学
·
软物质物理
·
纳米材料
·
自组装
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Qianbin Ni,Mei Chen,Yuming Chen,Wei Li,Qi Zhou,Jincheng Dai,Shuyao Ye,Binbo Jiang,Jingdai Wang,Yongrong Yang
Polyhedral oligomeric silsesquioxane (POSS) nanoaggregates can serve as a modifier of the MgCl2-supported Z-N catalyst, thus controlling the polymerization behavior and modifying the microstructure of the synthesized polymer. In this study, a series of POSS-modified MgCl2-supported Z-N catalysts were explored to reveal the relationship between the entanglement formation of ultrahigh-molecular-weight polyethylene (UHMWPE) and the adhesive effect control of hydroxy groups in POSSs. X-ray photoelectron spectroscopy (XPS) and CO in situ FTIR low-temperature adsorption technology were employed to investigate the catalytic surface structure. It was evidenced that POSSs can coordinate with the MgCl2 (110) plane, acting as adhesive of a cage structure to be in situ embedded into the MgCl2-based support. Therefore, the loaded TiCl4 active sites were isolated in the molecular scale on the MgCl2-based support and the entanglements were greatly suppressed thereof. The ″adhesion effect″ of the MgCl2 support can be controlled by adjusting the type (i.e., hydroxyl content) of POSS introduced, thereby suppressing entanglements to a greater extent. The MgCl2 support modified with POSS with no hydroxy groups endowed it with the optimum entanglement reduction effect. As a consequence, the as-synthesized polyethylene exhibits an overall promotion of the impact resistance (+14.1%), tensile strength (+13.9%), Young’s modulus (+16.8%), and break elongation (+10.5%), compared to those of UHMWPE synthesized from the POSS-free catalyst. In addition, the POSS-modified MgCl2-based catalyst shows more stable catalytic activity and responsiveness of molecular weight with hydrogen modulation, which exhibits great prospects of industrial application in polyethylene production.
研究领域:
材料科学
·
高分子化学
·
催化化学
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DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2012
·Vol. 291
·期 4
·789-803
·
IF 2.331
Zhang Xiaojing,Wang Chaojun,Fang Shaoming,Sun Jiashu,Li Chong,Hu Yuelei
In this paper, a series of hybrid star PLLA (sPLLA) with different arm lengths was synthesized via the hydrosilylation between octakis(dimethylsiloxy) silsesquioxane (Q 8 M 8 ) and functionalized PLLA macromolecules with vinyl end groups (mPLLA). mPLLA was synthesized by ring-opening polymerization of l -lactide using 2-hydroxyethylmethacryl as an initiator in the presence of stannous 2-ethylhexanoate as a catalyst. The obtained sPLLA has low polydispersity with polydispersity index values from 1.29 to 1.30. The arm numbers of sPLLA vary from 5 to 7 and decrease with the increase in the length of the mPLLA arm due to the steric hindrance, which are estimated by 1 H NMR analysis. The branched structure of sPLLA is also evidenced by the lower intrinsic viscosity when compared with the linear mPLLA with similar molecular weight. Both the glass transition temperatures ( T
g ’s) and melting temperatures ( T
m ’s) of sPLLAs are higher than those of the mPLLA arms. The incorporation of polyhedral oligomeric silsesquioxane (POSS) does not change the crystalline structure of PLLA, while the crystallinity of sPLLA is enhanced as the result that the POSS core acts as a heterogeneous nucleating agent in the matrix to promote the crystallization ability of PLLA. High-resolution transmission electron microscopy observation suggests that POSS disperses in the crystalline PLLA matrix as 5–20 nm aggregates. Microspheres of sPLLA with mean diameter 1 to 2 μm were prepared via emulsion solvent evaporation method. The sPLLA microspheres have higher loading capacity and encapsulation efficiency and lower drug release rate than mPLLA microspheres.
研究领域:
材料科学
·
药物递送
·
高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 9
·6403-6413
·
IF 2.993
Guo Danyi,Hou Kun,Xu Shouping,Lin Yingguang,Li Li,Wen Xiufang,Pi Pihui
Superhydrophobic–superoleophilic meshes with hierarchical structures were fabricated by spraying a POSS hybrid acrylic polymer on stainless steel mesh for oil–water separation in this paper. Fourier transform infrared spectroscopy, nuclear magnetic resonance ( 1 H NMR), and thermogravimetric analyses were used to verify the chemical composition and thermostability of the POSS hybrid acrylic polymer, which was synthesized via a free radical solution polymerization. The obtained mesh was characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, and optical contact angle meter to confirm the morphology, composition, and wettability of the film surface. The coated mesh, with a static water contact angle of 153° and a sliding angle of 4.5°, was applied to separate a series of oil–water mixtures, such as n -hexane, isooctane, petroleum ether, kerosene, and vegetable oil, with separation efficiency nearly 99%. In addition, the coated mesh still kept separation efficiency approximately 99% even after 25 separation cycles for n -hexane/water mixture. After 20 abrasion cycles, the water contact angle of the mesh remained 145°, and separation efficiency for n -hexane/water mixture is approximately 99%, indicating the coated mesh possessed good mechanical stability. The as-prepared mesh will be a promising material in oil–water separation, due to the simple, low-cost, and easily scalable fabrication method and the excellent separation performance in radical oil–water separation.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2021
·Vol. 9
·期 47
·9744-9753
·
IF 6.331
Kun Zhang,Xiaoni Wang,Minggang Tian,Zhiming Gou,Yujing Zuo
In recent years, it has been found that Cu2+, Fe3+, and amino acids play an irreplaceable and subtle role in organisms and have attracted the considerable attention of many researchers. Therefore, it is vital to design visual indicators to reveal the relationships between metal ions and amino acids. However, there have been few reports on this vigorous subject. Fortunately, based on the different coordination effects between metal ions and boron groups, we have designed an accessible fluorescent probe (PSI-A). Borane was introduced as an ion-sensitive group to form a novel POSS-based fluorescent probe, which achieves fascinating performance, in situ dynamic multiple detection, excellent photostability, and enervative biological toxicity. PSI-A exhibited predominant selectivity and sensitivity to Cu2+/amino acids and Fe3+/amino acids sequence reactions in HepG2 cells and zebrafish. The fluorescence of PSI-A was quenched by Cu2+, which can be recovered by adding Asp, Ser, Arg, Ace or Trp. Additionally, the fluorescence of PSI-A quenched by Fe3+ can be restored after adding Asp. PSI-A is available to monitor Cu2+/amino acids and Fe3+/amino acids sequence reactions and can be repeated for at least three consecutive cycles without a fatigued performance. Therefore, this multifunctional fluorescent probe may have prospective application potentials in the biological field.
研究领域:
分析化学
·
生物化学
·
材料科学
·
生物科学
✓ 已验证
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）