Study on the Preparation and Properties of Polyamide/Chitosan Nanocomposite Fabricated by Electrospinning Method

Abstract

The principal intention of this work is to fabricate and characterize the polyamide/chitosan nanocomposite by a novel single solvent method through the electrospinning procedure. The thermal properties and morphology of prepared nanocomposite are studied by thermogravimetric analysis (TGA) and eld-emission scanning electron microscopy (FE-SEM). TGA exposed that the primary decomposition temperature is reduced with rising of chitosan content in the nanocomposites and origin disintegration temperature for polyamide/chitosan nanocomposites is perceived to be in the range from 300 to 500°C. Also, FE-SEM images demonstrated that the nano bers of chitosan have good adhesion on the matrix and are well-oriented. Besides, the crystallinity and structural characteristics of the polyamide/chitosan nanocomposites are investigated by using X-ray diffraction (XRD) and Fourier transform-infrared spectroscopy (FT-IR), respectively. The results of XRD proved that the successful blending of chitosan in polyamide is achieved via the electrospinning method. FT-IR results demonstrate that the nano bers are consist of amine groups. Also, the electrical properties of the nanocomposite improved with the increasing content of chitosan and the conductivity of the polyamide/chitosan 5 wt% demonstrates the maximum current of 0.3 nA. Besides, the sheet resistance of the composite reduced 118 to 20 × 10 9 Ω with raising the chitosan volume from 0 to 5 wt%.

Antiviral Electrospun Polyamide Three-Layered Mask Filter Containing Metal Oxide Nanoparticles and Black Seed Oil

“…The fiber diameter ranges from 25 to 200 nm with pore size distribution from 100 to 400 nm. Upon the addition of 5% chitosan (Cs), the fiber diameter appears to be finer with lower pore sizes (Figure e), in agreement with those reported by Fazeli et al Upon the addition of the oil, it became larger with bigger pore sizes (Figure f). The addition of both chitosan and oil (Figure g) resulted in a similar fiber with a similar pore size distribution to the initial electrospun polymeric mat, which constitutes the first filter layer.…”

Developing Self-Assembled Starch Nanoparticles in Starch Nanocomposite Films

“…The preparation of SNPs can be categorized into two classifications based on the precursor material utilized for synthesis, bottom-up and top-down. Nanoparticles can be synthesized from a top-down process where larger volumes of materials or microparticles are broken down while nanoparticles can be generated by a bottom-up process made up of small primary cores made from building blocks of atoms or molecules that is controlled by thermodynamic standards such as self-assembly . In addition, a top-down process may be classified due to the number of stages it takes to prepare the final SNPs involved in simple or hybrid processes.…”

“…Nanoparticles can be synthesized from a top-down process where larger volumes of materials or microparticles are broken down while nanoparticles can be generated by a bottom-up process made up of small primary cores made from building blocks of atoms or molecules that is controlled by thermodynamic standards such as self-assembly. 5 In addition, a top-down process may be classified due to the number of stages it takes to prepare the final SNPs involved in simple or hybrid processes. Acid hydrolysis and enzymatic hydrolysis have been described as popular top-down simple methods for generating SNPs.…”

The enhancement of antibacterial and anti‐biofouling properties of chitosan/silver nanoparticles‐grafted composite polyamide membrane

“…In the modified membrane (TFC/PA-g-CS), the band enhancement in the range of 3600-3200 cm À1 is due to the stretching of N H and O H groups, along with the intramolecular hydrogen bonds from chitosan. 32 The enhanced peak at 1020 cm À1 , typical for the chemical bond of C O C, 33 also indicates the presence of chitosan on the membrane surface.…”