Journal of Materials Chemistry B
·
2024
·Vol. 12
·期 17
·4184-4196
·
IF 6.1
Linsen Li,Yue Yu,Xiaoqing Sun,Xingyou Wang,Xiayan Yang,Qifeng Yu,Ke Kang,Yao Wu,Qiangying Yi
Stent implantation is one of the most effective methods for the treatment of atherosclerosis. Nitinol stent is a type of stent with good biocompatibility and relatively mature development; however, it cannot effectively achieve long-term anticoagulation and early endothelialization. In this study, nitinol surfaces with the programmed assembly of heparin, exosomes from endothelial cells, and endothelial affinity peptide (REDV) were fabricated through layer-by-layer assembly technology and click-chemistry, and then exosomes/REDV-modified nitinol interface (ACC-Exo-REDV) was prepared. ACC-Exo-REDV could promote the rapid proliferation and adhesion of endothelial cells and achieve anticoagulant function in the blood. Besides, ACC-Exo-REDV had excellent anti-inflammatory properties and played a positive role in the transformation of macrophage from the pro-inflammatory to anti-inflammatory phenotype. Ex vivo and in vivo experiments demonstrated the effectiveness of ACC-Exo-REDV in preventing thrombosis and hyperplasia formation. Hence, the programmed assembly of exosome interface could contribute to endothelialization and have potential application on the cardiovascular surface modification to prevent stent thrombosis and restenosis.
研究领域:
生物医学工程
·
心血管疾病
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2024
·
IF 6.7
Cheng Dong,Zhiwen Wang,Yanbin Chen,Yan Li,Zhenxin Yi,Chenguang Zhu,Lin Zhang,Shunguan Zhu
Introducing energetic metal complexes into solid propellants is an effective strategy for enhancing their energy release and improving the agglomeration of their catalysts. In this study, the metal complex [Ni(N 2 H 4 ) 2 ](N 3 ) 2 (NHA) was incorporated into hydroxyl terminated polybutadiene-based composite solid propellants, and its optimal catalytic ratio and catalytic mechanism for ammonium perchlorate (AP) were investigated through performance characterization. The optimal catalyst content was determined to be 1 %, whereby the exothermic peak temperature advanced by 26 ℃ compared to the blank control group, as examined by differential scanning calorimetry. The heat of explosion was 5744.98 J·g −1 . An increase in the burning rate while ensuring a pressure exponent below 0.5 (specifically, 0.399) was achieved simultaneously. The characterization of the flame structure demonstrated that the catalytic effect of NHA was concentrated in the condensed phase reaction zone of the propellant, which decreased in the Al agglomeration from 111.41 μm to 59.42 μm. Its catalytic effect is attributed to the rapid release of NiO particles during the decomposition of NHA, which formed a microchemical reaction zone on the AP surface, resulting in its increased porosity. The porous AP structure exposed more catalytically active sites, synergistically enhancing the catalytic efficacy.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Yiyong Zhang,Kun Li,He Li,Yunhui Wang,Yueying Peng,Shuangshuang Lin,Bing Joe Hwang,Jinbao Zhao
Lithium sulfur batteries have been widely studied because of their high energy density . However, their commercialization has been impeded by several problems, such as the poor conductivity of the active material sulfur and its discharge products, the volume expansion and the shuttle effect caused by the polysulfide intermediates dissolving in organic electrolytes. To address these problems well, we have constructed high sulfur content spherical sulfur-carbon nanotube-polyethylene glycol-nickel nitrate hydroxide (SCNT-PEG-NNH) composite material by using a simple ball-milling method. The conductivity of the composite material gets improvement due to the spherical conductive frame constructed by CNT, while the shuttle effect of polysulfides is well inhibited by the wrapping of the PEG and the fixation of NNH. The results of electrochemical tests have shown that the performance of cathode made by the SCNT-PEG-NNH composite material is greatly improved. Therefore, the SCNT-PEG-NNH composite material can be a promising cathode material for lithium sulfur batteries.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 14
·145704
·
IF 3.5
Jin Tan,Ling Lan,Yan-ni Wu,Song-bai Qiu
The graphene-like wrapped Ni@C catalysts were facilely synthesized by a modified sol–gel method. Nickel nitrate and citric acid (CA) were adopted as the raw materials to form sol–gel mixture. Under the circumstances, the additive CA were employed not only as a complexing agent but also as a carbon source. It is found that the calcination temperature and the mole ratios between Ni and CA are the key factors affecting the physical property and the catalytic performance of catalysts in the conversion of nitroarenes into corresponding anilines. The results show that the Ni@C-500(1:1) catalyst exhibited the best performance in the hydrogenation of o-chloronitrobenzenes (o-CNB) to o-chloroanilines (o-CAN). The yield of o-CAN was achieved at 100% when o-CNB was completely converted at 40.0 °C under 2.0 MPa H2 for 2.0 h. Furthermore, the Ni@C-500(1:1) catalyst could be separated and recovered easily after reaction by an external magnetic field. The investigated results indicate that the Ni@C-500(1:1) catalyst remained higher activity after using twelve times. More importantly, this kind of catalyst is also active for the selective hydrogenation of other nitroarenes into the corresponding anilines. This new synthetic method may pave a way for producing low-cost Ni@C catalysts on a large scale, which is attractive for industrial anilines applications.
研究领域:
化学工程
·
材料科学
·
催化
·
有机化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）