A Novel Organophosphorus Hybrid with Excellent Thermal Stability: Core–Shell Structure, Hybridization Mechanism, and Application in Flame Retarding Semi-Aromatic Polyamide

2015 ◽  
Vol 8 (1) ◽  
pp. 881-890 ◽  
Author(s):  
Xue-Bao Lin ◽  
Shuang-Lan Du ◽  
Jia-Wei Long ◽  
Li Chen ◽  
Yu-Zhong Wang
2017 ◽  
Vol 5 (30) ◽  
pp. 7431-7435 ◽  
Author(s):  
Sunqi Lou ◽  
Tongtong Xuan ◽  
Caiyan Yu ◽  
Mengmeng Cao ◽  
Chao Xia ◽  
...  

The CsPbBr3@NH4Br nanocomposites were successfully synthesized through ion exchange. The nanocomposites possessed a special core@shell structure and exhibited a high absolute PLQY, long lifetime, good water resistance and excellent thermal stability.


2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Laura Angélica Ardila Rodriguez ◽  
Dilermando Nagle Travessa

The production of metal matrix composites with elevated mechanical properties depends largely on the reinforcing phase properties. Due to the poor oxidation resistance of multiwalled carbon nanotubes (MWCNTs) as well as their high reactivity with molten metal, the processing conditions for the production of MWCNT-reinforced metal matrix composites may be an obstacle to their successful use as reinforcement. Coating MWCNTs with a ceramic material that acts as a thermal protection would be an alternative to improve oxidation stability. In this work, MWCNTs previously functionalized were coated with titanium dioxide (TiO2) layers of different thicknesses, producing a core-shell structure. Heat treatments at three different temperatures (500°C, 750°C, and 1000°C) were performed on coated nanotubes in order to form a stable metal oxide structure. The MWCNT/TiO2 hybrids produced were evaluated in terms of thermal stability. Thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy (RS), and X-ray photoelectron spectroscopy (XPS) were performed in order to investigate TiO2-coated MWCNT structure and thermal stability under oxidative atmosphere. It was found that the thermal stability of the TiO2-coated MWCNTs was dependent of the TiO2 layer morphology that in turn depends on the heat treatment temperature.


2020 ◽  
Vol 44 (15) ◽  
pp. 5661-5665
Author(s):  
Hongbo Yu ◽  
Zhengtong Guo ◽  
Chunzheng Wu ◽  
Shujian Wang ◽  
Bin Li ◽  
...  

The combination of the Au–Fe2O3 phase and core–shell structure helps in achieving high activity and good thermal stability.


2013 ◽  
Vol 750-752 ◽  
pp. 348-351
Author(s):  
Di Fang Zhao ◽  
Ming Hua Li ◽  
Jin Song Xie

In this work, Core-shell structure palygorskite/nanoCaCO3(PnC) composite particles have been synthesized chemically, employing solution precipitation methods. Crystal structure, morphology and thermal stability properties are investigated by means of X-ray diffraction (XRD), transmission electronic microscopy (TEM) and Thermogravimetric (TG) analysis. The results showed that the PnC particles were almost monodispersed microsphere aspect with the size was about 1-3 μm diameter. The nanocomposite particles exhibit the marked thermal stability properties than the palygorskite clay mineral.


2017 ◽  
Vol 309 ◽  
pp. 140-150 ◽  
Author(s):  
Feiyan Gong ◽  
Jianhu Zhang ◽  
Ling Ding ◽  
Zhijian Yang ◽  
Xiaobing Liu

2011 ◽  
Vol 282-283 ◽  
pp. 354-358 ◽  
Author(s):  
Lu Lu Chen ◽  
Hong Yan Ding ◽  
Yue Zhang ◽  
Guang Hong Zhou

Conducting attapulgite/titania/polyaniline/ (ATP/TiO2/PANI) core-shell nanocomposites (CSNs) were synthesized via oxidative polymerization of aniline after the surface modification of the ATP carried with TiO2nanoparticles. The structure and morphology of the ATP/TiO2/PANI CSNs were characterized by X-ray diffraction, scanning electron microscopy, and fourier transform infrared. The thermal stability of the ATP/TiO2/PANI CSNs was also investigated by thermal analyzer. The results show that the ATP/TiO2/PANI CSNs display “capsule like” core-shell structure, of which ranging in diameter of about 80 nm and length of about 250 nm. In addition, the ATP/TiO2/PANI CSNs present a higher degree of crystallization and better thermal stability. We believe that the excellent core-shell structure and better thermal stability should be prone to improve their other properties and enlarge their application.


2006 ◽  
Vol 41 (7) ◽  
pp. 1242-1248 ◽  
Author(s):  
Lianxia Chang ◽  
Haibin Yang ◽  
Wuyou Fu ◽  
Nan Yang ◽  
Jiuju Chen ◽  
...  

2007 ◽  
Vol 334-335 ◽  
pp. 1025-1028
Author(s):  
Zi Yi Zong ◽  
Xi Jiang Yin ◽  
Li Fang Lew ◽  
Soo Yee Tan

In this study, TiO2 was successfully coated on Stober silica beads followed by depositing Au nanoparticles on this core-shell structure. The size of the Au nanoparticles was well controlled in the range of 2 – 7 nm. This composite exhibited high thermal stability. When used as a model catalyst for oxidation of CO at low temperatures, the Au/TiO2/SiO2 showed a much higher catalytic activity than the Au/SiO2 and Au/TiO2(P25) catalysts.


2015 ◽  
Vol 53 (4) ◽  
pp. 287-293
Author(s):  
Byung-Hyun Choi ◽  
Young Jin Kang ◽  
Sung-Hun Jung ◽  
Yong-Tae An ◽  
Mi-Jung Ji

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