Synthesis and characterization of new biocompatible copolymer: chitosan-graft-polyaniline

Sedaghat, Sajjad

doi:10.1186/2228-5326-4-2

Cited by 6 publications

(5 citation statements)

References 16 publications

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“…Reinforcing of various inorganic fillers have been projected for alleviating the mechanical integrity of PANI based composite membranes. Additives such as silica, 21,22 titanium, 23,24 zirconia, 25,26 and carbon materials 27,28 were well suited for the enhancement of mechanical properties and dimensional stability of PANI based electrolyte membranes. In general, the incorporation of inorganic additives paves the way to modify the polymer electrolyte membranes with required characteristics for a specific application 29 …”

Section: Introductionmentioning

confidence: 99%

Novel polysulfone/sulfonated polyaniline/niobium pentoxide polymer blend nanocomposite membranes for fuel cell applications

Mahimai

Kulasekaran

Deivanayagam

2021

J of Applied Polymer Sci

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New series of polymer nanocomposite membranes were prepared from polysulfone (PSU), sulfonated polyaniline (SPANI) and niobium pentoxide (Nb 2 O 5 ) by solution casting technique. In order to assess the suitability of the polymer electrolytes in fuel cell applications, the membranes were characterized with respect to their physicochemical properties. Scanning electron microscope, X-ray diffraction, and X-ray photoelectron spectroscopy data confirmed the successful incorporation of nanofillers into the polymer matrix. The membrane loaded with 10 wt% of niobium pentoxide into PSU/SPANI exhibited a proton conductivity of 0.0674 S cm À1 , whereas the control membrane showed 0.0110 S cm À1 . The incorporation of niobium pentoxide into pristine polymer not only improved the ionic conductivity but also enhanced the thermal and oxidative stabilities. The substantial results achieved with the organicinorganic polymer composites derived from PSU-SPANI and Nb 2 O 5 have been established and can be viable materials for electrolyte in fuel cell applications.

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Section: Introductionmentioning

confidence: 99%

Novel polysulfone/sulfonated polyaniline/niobium pentoxide polymer blend nanocomposite membranes for fuel cell applications

Mahimai

Kulasekaran

Deivanayagam

2021

J of Applied Polymer Sci

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“…13,14 Consequently, PANI may have potential applications in electrical nanodevices. Polyaniline inorganic particle composites have been studied for applications as biosensors 15 and in high-density storage devices. 16 Successful preparation of conducting polymer as humidity sensor has been reported.…”

Section: Introductionmentioning

confidence: 99%

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Shubha

Rao

2016

J. Adv. Dielect.

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The polyaniline/copper oxide (PANI/CuO) nanocomposite was prepared by mixing solutions of polyaniline and copper oxide nanoparticles in dimethyl sulfoxide (DMSO). The synthesized polymer nanocomposites were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM) and UV-visible spectroscopy. The characteristic peaks in XRD and UVvisible spectra confirmed the presence of CuO in the polymer structure. SEM images indicated morphological changes in the composite matrix as compared to the pristine PANI. The DC conductivity measurements were performed using two-probe method for various temperatures. AC conductivity and dielectric response of the composites were investigated in the frequency range of 10 2 -10 6 Hz using LCR meter. Dielectric permittivity 0 ðwÞ and dielectric loss factor 00 ðwÞ were investigated. It was observed that 0 ðwÞ and 00 ðwÞ decrease with increase in frequency at all temperatures. At a particular frequency it is observed that both 0 ðwÞ and 00 ðwÞ increase with increase in temperature. It was also observed that AC conductivity increased with increase in frequency and temperature.

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“…Subsequent addition of Ch demonstrated an enhancement in the peak between 3200 and 3600 cm −1 which was significantly broad compared to previous layers [73]. This is primarily due to hydroxyl and amine groups present in the glucosamine moiety of chitosan [74,75]. Additionally, shifts were observed in the carbonyl amide I region to 1643 cm , respectively [76].…”

Section: Ftir Spectroscopymentioning

confidence: 69%

Comparison of Engineered Peptide-Glycosaminoglycan Microfibrous Hybrid Scaffolds for Potential Applications in Cartilage Tissue Regeneration

Romanelli

Knoll

Santora

et al. 2015

Fibers

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Advances in tissue engineering have enabled the ability to design and fabricate biomaterials at the nanoscale that can actively mimic the natural cellular environment of host tissue. Of all tissues, cartilage remains difficult to regenerate due to its avascular nature. Herein we have developed two new hybrid polypeptide-glycosaminoglycan microfibrous scaffold constructs and compared their abilities to stimulate cell adhesion, proliferation, sulfated proteoglycan synthesis and soluble collagen synthesis when seeded with chondrocytes. Both constructs were designed utilizing self-assembled Fmoc-protected valyl cetylamide nanofibrous templates. The peptide components of the constructs were varied. For Construct I a short segment of dentin sialophosphoprotein followed by Type I collagen were attached to the templates using the layer-by-layer approach. For Construct II, a short peptide segment derived from the integrin subunit of Type II collagen binding protein expressed by chondrocytes was attached to the templates followed by Type II collagen. To both constructs, we then attached the natural polymer N-acetyl glucosamine, chitosan. Subsequently, the glycosaminoglycan chondroitin sulfate was then attached as the final layer. The scaffolds were characterized by Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), atomic force microscopy and scanning electron microscopy. In vitro culture studies were carried out in the presence of chondrocyte cells for OPEN ACCESSFibers 2015, 3 266 both scaffolds and growth morphology was determined through optical microscopy and scanning electron microscopy taken at different magnifications at various days of culture. Cell proliferation studies indicated that while both constructs were biocompatible and supported the growth and adhesion of chondrocytes, Construct II stimulated cell adhesion at higher rates and resulted in the formation of three dimensional cell-scaffold matrices within 24 h. Proteoglycan synthesis, a hallmark of chondrocyte cell differentiation, was also higher for Construct II compared to Construct I. Soluble collagen synthesis was also found to be higher for Construct II. The results of the above studies suggest that scaffolds designed from Construct II be superior for potential applications in cartilage tissue regeneration. The peptide components of the constructs play an important role not only in the mechanical properties in developing the scaffolds but also control cell adhesion, collagen synthesis and proteoglycan synthesis capabilities.

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Synthesis and characterization of new biocompatible copolymer: chitosan-graft-polyaniline

Cited by 6 publications

References 16 publications

Novel polysulfone/sulfonated polyaniline/niobium pentoxide polymer blend nanocomposite membranes for fuel cell applications

Novel polysulfone/sulfonated polyaniline/niobium pentoxide polymer blend nanocomposite membranes for fuel cell applications

Temperature characterization of dielectric permittivity and AC conductivity of nano copper oxide-doped polyaniline composite

Comparison of Engineered Peptide-Glycosaminoglycan Microfibrous Hybrid Scaffolds for Potential Applications in Cartilage Tissue Regeneration

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