Thermal properties of phosphorylated nanodiamond reinforced polyimides

Abstract

Recently, the preparation of nanodiamond-polymer composites has attracted the attention of materials scientists due to the unique properties of nanodiamonds. In this study, novel polyimide (PI)/phosphorylated nanodiamonds (PNDs) composites were prepared. PNDs were achieved from the reaction of methylphosphonic dichloride with nanodiamonds in dichloromethane. Precursor of polyimide, which is the poly(amic acid) (PAA), was successfully synthesized with 3,3 0 , 4,4 0 -benzophenonetetracarboxylic dianhydride and 4,4 0oxydianiline in the solution of N,N-dimethylformamide. Different ratios of phosphorylated nanodiamond particles were added into PAA solution and four different nanocomposite films were prepared. The amount of PNDs in the composite films was varied from 0 wt% to 3 wt%. The structure, thermal and surface properties of polyimide films were characterized by scanning electron microscopy (SEM), ATR-FTIR, thermogravimetric analysis (TGA), ultraviolet visible spectroscopy, and contact angle. SEM and FTIR results showed that the phosphorylated nanodiamond and PI/PNDs films were successfully prepared. Phosphorylated nanodiamonds were homogeneously dispersed in the polymer matrix and they displayed good compatibility. TGA results showed that the thermo-oxidative stability of PI/PNDs films was increased with the increasing amount of phosphorylated nanodiamond. POLYM. COM-POS., 37:2285-2292,

Nanodiamond‐containing polyethyleneimine hybrid materials for lead adsorption from aqueous media

“…In literature, ND particles that were previously modified with phosphorus groups were integrated into the polyimide matrix to reveal the increasing amount of ND‐enhanced thermal resistance . In another research, ND particles modified with phospholipids were integrated into poly(lactic acid) in varying rates to reveal the composite with 12% ND content that had the best thermal resistance .…”

“…The two results are compatible with each other. In addition, the synthesized modified ND size distribution is consistent with the literature …”

“…It was found that the resultant weight loss was shifted to the higher temperature values by increasing the surface‐modified ND content. The results were consistent with the literature …”

Detonation Nanodiamonds: A Comparison Study by Photoacoustic, Diffuse Reflectance, and Attenuated Total Reflection FTIR spectroscopies

“…ATR-FTIR spectrometry is considered the most convenient selection for ND surfaces due to its simplicity and as it provides spectra comparable with the transmission spectra [7,19,20]. It does not require the sample dilution, which opens the far IR region.…”

Molecular Weight Determination by Luminescent Chemo–enzymatics

“…The enzyme-catalysed degradation of synthetic and natural polymers is well described in literature [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] (Table 2). Urease in particular, is known to degrade polyureas and polyurethanes.…”