Thermal, combustion and optical properties of new polyimide/ODA-functionalized Fe3O4 nanocomposites containing xanthene and amide groups

Shabanian, Meisam; Mirzakhanian, Zeinab; Moghanian, Hassan; Hajibeygi, Mohsen; Satha, Hamid; Khonakdar, Hossein Ali

doi:10.1007/s10973-017-6116-8

Cited by 13 publications

(5 citation statements)

References 37 publications

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“…In this way, MWCNTs-OH (0.2 g) was added to CPTES (0.2 ml, 1 mmol) dissolved in 20-ml dried toluene and the mixture was dispersed by ultrasonication for 10 min. After this step, the mixture was stirred for 18 h at 60 C. MWCNTs/ CPTES was separated by filtration, washed with toluene, and dried in an oven at 95 C for 10 h. [41,42]…”

Section: Preparation Of Mwcnt/cptesmentioning

confidence: 99%

Multiwalled carbon nanotubes/guanidine/Ni (II): A new and effective organometallic catalyst for the green synthesis of pyrazolopyranopyrimidines

Saeidiroshan

Moradi

2021

Applied Organom Chemis

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In this research, we report the first example of the use of multiwalled carbon nanotubes/guanidine/Ni (II) as a new and effective catalyst. The supported catalyst was prepared through a new method and characterized by Fourier transform infrared, scanning electron microscopy, energy-dispersive spectroscopy, inductively coupled plasma, thermogravimetric analysis, ultraviolet diffuse reflectance spectroscopy, and transmission electron microscopy. Obtained catalyst was used for green and efficient synthesis of pyrazolopyranopyrimidines via four-component reaction of hydrazine hydrate, ethyl acetoacetate, barbituric acid, and aromatic aldehydes under ultrasonic condition. All products were obtained in high yields and short reaction times. Also, the prepared catalyst was easily separated from the reaction mixture and reused for several times without significant loss of activity.

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Section: Preparation Of Mwcnt/cptesmentioning

confidence: 99%

Multiwalled carbon nanotubes/guanidine/Ni (II): A new and effective organometallic catalyst for the green synthesis of pyrazolopyranopyrimidines

Saeidiroshan

Moradi

2021

Applied Organom Chemis

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“…PI‐based composites with superior mechanical properties, thermal stability and flame retardant properties are urgently required in the aerospace and industrial fields. Previous studies have mainly focused on enhancing individual or a few specific properties such as mechanical strength, temperature resistance and flame retardancy while neglecting the simultaneous improvement of overall performance 21–23 . Glass fiber (GF) possesses excellent mechanical properties and is widely utilized for strengthening or toughening polymers 24 .…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have mainly focused on enhancing individual or a few specific properties such as mechanical strength, temperature resistance and flame retardancy while neglecting the simultaneous improvement of overall performance. [21][22][23] Glass fiber (GF) possesses excellent mechanical properties and is widely utilized for strengthening or toughening polymers. 24 Additionally, its lightweight nature, low thermal conductivity, good temperature resistance, and affordability make it an ideal candidate as a fillers to tune the performance of PI-based composites.…”

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confidence: 99%

Investigation on flame‐retardant, thermal and mechanical properties of glass fiber reinforced polyimide composites

He,

Liu,

Jiao

2023

Polymer Composites

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Composites with excellent flame retardant and mechanical properties are in high demand in the aerospace and various industrial fields. Glass fiber (GF) reinforced polyimide (PI) composites (GFRPCs) were fabricated using a simple ball milling and hot pressing technique. The effect of GF content on the thermal stability, mechanical and flame retardant properties of composites has been systematically studied. The Rockwell hardness of GFRPCs increase with increasing GF content, while the compressive strength, impact strength and flexural strength initially show an increase followed by a decrease due to the excellent dispersibility of the fillers and the strong interfacial interaction between the one‐dimensional GF and PI matrix. Thermogravimetric analysis results show that the addition of GF with very low thermal conductivity and excellent temperature resistance can effectively improve the thermal stability of PI. Adding GF into PI can obviously improve the limiting oxygen index value. Moreover, as the GF content increased, the time to ignition of the composites prolonged while total heat release decreased. These findings suggest a viable solution for enhancing both the flame retardance and mechanical properties of PI‐based composites.Highlights GFRPCs with high GF content fabricated via ball milling‐hot pressing method. Silane modified GF obviously improves the thermal stability of PI matrix. GFRPCs‐28 exhibits superior mechanical properties. An increases in time to ignition (TTI) and mass residual rate (MRR) of the GFRPCs was observed on adding GF.

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“…In general, metal oxide nanoparticles such as zinc oxide (ZnO), iron oxide (Fe 3 O 4 ), aluminum oxide (Al 2 O 3 ), silicon dioxide (SiO 2 ), manganese dioxide (MnO 2 ) and titanium dioxide (TiO 2 ) could be incorporated in the different polymeric matrices such as cellulose, porous resins, polyurethanes, chitosan, polyamides (PAs) and polyimides . Among them, ZnO nanoparticles, due to its many important properties, such as chemical stability , catalytic , electronic has been considered in recent years.…”

Section: Introductionmentioning

confidence: 99%

New nanocomposites based on polyamide containing imine groups reinforced with functionalized polyethyleneimine‐modified ZnO nanoparticles; fabrication, characterization and lead ion adsorption studies

2018

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New polyamide (PA)/ZnO nanocomposites were prepared using polyethyleneimine (PEI) surface‐modified ZnO nanoparticles (PSMZ) by solution mixing method. PSMZ was prepared via imine linkages between PEI and silane‐amine functionalized ZnO nanoparticles. Multifunctional PA containing imine groups was synthesized by direct polycondensation reaction and used as a polymer matrix. X‐ray diffraction (XRD) and field‐emission scanning electron microscopy results showed that the ZnO nanoparticles were uniformly distributed in the PA matrix. The UV–Vis spectra of the nanocomposites exhibited reduction in absorption intensities due to high interactions between functional groups of PSMZ and PA. The thermogravimetric analysis results exhibited that the temperature at 10 mass% loss (T10) increased from 314 to 352°C for PA nanocomposite containing 6 mass% of PSMZ, as well as enhancement of char residue compared with the neat PA. Also, the synthesized PA and corresponding nanocomposites were used as effective adsorbent for the lead ions removal from aqueous solution, which the results showed up to 100% removal efficiency. POLYM. COMPOS., 40:2602–2616, 2019. © 2018 Society of Plastics Engineers

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Thermal, combustion and optical properties of new polyimide/ODA-functionalized Fe3O4 nanocomposites containing xanthene and amide groups

Cited by 13 publications

References 37 publications

Multiwalled carbon nanotubes/guanidine/Ni (II): A new and effective organometallic catalyst for the green synthesis of pyrazolopyranopyrimidines

Multiwalled carbon nanotubes/guanidine/Ni (II): A new and effective organometallic catalyst for the green synthesis of pyrazolopyranopyrimidines

Investigation on flame‐retardant, thermal and mechanical properties of glass fiber reinforced polyimide composites

New nanocomposites based on polyamide containing imine groups reinforced with functionalized polyethyleneimine‐modified ZnO nanoparticles; fabrication, characterization and lead ion adsorption studies

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