Recent trends in Nitrogen doped polymer composites: a review

Jadhav, Pratibha S.; Joshi, Girish M.

doi:10.1007/s10965-021-02436-x

Cited by 11 publications

(9 citation statements)

References 114 publications

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“…The resultant increased thermal conductivity is due to the presence of a higher nitrogen content in NC as shown in Fig. 13(a) 55 . Recently the same effect of nitrogen on thermal properties has been reported 56,57 .…”

Section: Resultsmentioning

confidence: 68%

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Study of the preparation and properties of polyvinyl chloride/nitrocellulose polymer blends

Jadhav

Joshi

Humbe

et al. 2022

Polymer International

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In this study, we prepared Polyvinyl chloride (PVC)/Nitrocellulose (NC) polymer blend by the solution casting technique. The structural properties and decreased interplanar spacing and crystalline nature of the PVC/NC blends were confirmed by an XRD technique. Basic chemical fingerprint regions of PVC/NC blends were confirmed by the Fourier transform IR method. Optical properties correlated with a decreased direct and indirect bandgap energy of PVC/NC were estimated using UV–visible spectra. They exhibited a shift in the absorption spectra towards the longer wavelength region due to process of charge transfer in the blend system. An increased microporous nature of the blends was demonstrated by SEM. Based on the Maxwell–Wagner model the dielectric constant and relative loss were found to have a maximum in the low frequency region which may be contributed by the polar nature of NC. We confirmed the hydrophilic nature of the PVC/NC blends due to the presence of hydroxyl groups by the goniometer technique. The thermophysical properties of the blends were measured by Lee's disc method. NC loading in the blend system increased the thermal conductivity from 0.12 to 0.18 W/(m.K). The Shore A softness test of the blends exhibited an 18% increase. We quantified structure, bandgap, morphology, and dielectric, surface and thermal properties as a function of NC blending. This new emerging blend may be a remedy for various engineering applications. © 2022 Society of Industrial Chemistry.

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Section: Resultsmentioning

confidence: 68%

“…13 (a). 55 Recently the same effect of nitrogen on thermal properties has been reported. 56,57 As a result, modification of the phonon mean free path is due to elastic disorder and chain defect scattering of the phonons caused by weak hydrogen bonding in the polymer blend.…”

Section: Thermal Conductivity Of the Pvc/nc Blendmentioning

confidence: 61%

Study of the preparation and properties of polyvinyl chloride/nitrocellulose polymer blends

Jadhav

Joshi

Humbe

et al. 2022

Polymer International

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“…R.H. Khalaf et al also measured K of EP/UPE polymer blends by using Lees disc method 65 . We adapted same method utilized in our previous study, whole process and setup of lee's disk method was explained in the same literature study 43,66 . Figure 14a shows K of pure PAN and PAN/NC polymer blends.…”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of polyacrylonitrile/nitrocellulose engineering blend

Jadhav

Joshi

Deshmukh

2023

J of Applied Polymer Sci

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Polyacrylonitrile (PAN) polymer blends were more in demand due to their wide range of applications. We overcome the restricted low thermal stability and poor strength for deployable blend. In the present study, we prepared PAN and nitrocellulose (NC) polymer blends by solution casting method to overcome the low loss, low dielectric properties as alternative blend for cladding purpose in communication domain. C≡N bond exclusively demonstrated the impact on blending was confirmed by Fourier‐transform infrared spectrophotometer (FTIR) and Raman microscopy measurement. Semicrystalline nature of polymer blends as a function of NC loading was determined by X‐ray diffraction (XRD). Optical polarizing microscopy (OPM) and scanning electron microscopy (SEM) analysis illustrated an appearance of micro flocculated spherulites. Blending ratio of PAN/NC demonstrated the decreased direct band gap identified by Ultraviolet spectroscopy (UV). PAN/NC proved excellent alternative as low dielectric constant and low loss as cladding medium. Blending of NC with PAN exhibited an increased hydrophilicity was confirmed by surface goniometer. Increased thermal stability of polymer blends was mapped by thermogravimetric analysis (TGA). Blend melting temperature and glass transition temperature was increased from 322°C to 334°C and 88°C to 102°C confirmed by Differential scanning calorimetry (DSC) analysis. Thermal conductivity was increased from ~0.13 to ~0.34 W/m. k for PAN/NC determined by Lee's disc probe method. Mechanical properties of blends were measured using universal testing machine (UTM). Tensile strength and Young's modulus was increased up to ~23%, and ~ 56%, whereas elongation break was decreased up to ~71% for PAN/NC blends compared to host PAN system. PAN/NC may suit promising candidate as cladding blend for communication engineering due to low loss and low dielectric constant.

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“…The synthesis temperature, synthesis time, catalyst and substrate mass, and gas flow rate were set at 750 °C, 2 h, 0.6 g, and 150 sccm, respectively. Further information about the catalyst preparation procedure is detailed elsewhere [ 23 , 31 ]. A polyvinylidene fluoride (PVDF) matrix was purchased from 3M Canada (Grade: 11008/0001), with a melting point of 160 °C.…”

Section: Methodsmentioning

confidence: 99%

“…Generally, the introduction of N atoms into carbonaceous materials can modulate electronic structures, which significantly impacts the electrical conductivity [ 21 , 22 , 23 ]. In this method, due to the different nitrogen content and various types of nitrogen bonding, i.e., graphitic, pyridinic, pyrrolic, and quaternary, physical and chemical features of the nitrogen-doped CNTs (N-MWNTs) can be controlled [ 20 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ]. For instance, Liu et al [ 32 ] showed that nitrogen concentration dictates the morphology of nanotubes to be bamboo-like, straight nanotubes, or inter-linked corrugated morphology.…”

Section: Introductionmentioning

confidence: 99%

A Simple Approach to Control the Physical and Chemical Features of Custom-Synthesized N-Doped Carbon Nanotubes and the Extent of Their Network Formation in Polymers: The Importance of Catalyst to Substrate Ratio

et al. 2021

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This study intends to reveal the significance of the catalyst to substrate ratio (C/S) on the structural and electrical features of the carbon nanotubes and their polymeric nanocomposites. Here, nitrogen-doped carbon nanotube (N-MWNT) was synthesized via a chemical vapor deposition (CVD) method using three ratios (by weight) of iron (Fe) catalyst to aluminum oxide (Al2O3) substrate, i.e.,1/9, 1/4, and 2/3, by changing the Fe concentration, i.e., 10, 20, and 40 wt.% Fe. Therefore, the synthesized N-MWNT are labelled as (N-MWNTs)10, (N-MWNTs)20, and (N-MWNTs)40. TEM, XPS, Raman spectroscopy, and TGA characterizations revealed that C/S ratio has a significant impact on the physical and chemical properties of the nanotubes. For instance, by increasing the Fe catalyst from 10 to 40 wt.%, carbon purity increased from 60 to 90 wt.% and the length of the nanotubes increased from 1.2 to 2.6 µm. Interestingly, regarding nanotube morphology, at the highest C/S ratio, the N-MWNTs displayed an open-channel structure, while at the lowest catalyst concentration the nanotubes featured a bamboo-like structure. Afterwards, the network characteristics of the N-MWNTs in a polyvinylidene fluoride (PVDF) matrix were studied using imaging techniques, AC electrical conductivity, and linear and nonlinear rheological measurements. The nanocomposites were prepared via a melt-mixing method at various loadings of the synthesized N-MWNTs. The rheological results confirmed that (N-MWNTs)10, at 0.5–2.0 wt.%, did not form any substantial network through the PVDF matrix, thereby exhibiting an electrically insulative behavior, even at a higher concentration of 3.0 wt.%. Although the optical microscopy, TEM, and rheological results confirmed that both (N-MWNTs)20 and (N-MWNTs)40 established a continuous 3D network within the PVDF matrix, (N-MWNTs)40/PVDF nanocomposites exhibited approximately one order of magnitude higher electrical conductivity. The higher electrical conductivity of (N-MWNTs)40/PVDF nanocomposites is attributed to the intrinsic chemical features of (N-MWNTs)40, such as nitrogen content and nitrogen bonding types.

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Recent trends in Nitrogen doped polymer composites: a review

Cited by 11 publications

References 114 publications

Study of the preparation and properties of polyvinyl chloride/nitrocellulose polymer blends

Study of the preparation and properties of polyvinyl chloride/nitrocellulose polymer blends

Preparation and characterization of polyacrylonitrile/nitrocellulose engineering blend

A Simple Approach to Control the Physical and Chemical Features of Custom-Synthesized N-Doped Carbon Nanotubes and the Extent of Their Network Formation in Polymers: The Importance of Catalyst to Substrate Ratio

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