The effect of dispersion technique, silver particle loading, and reduction method on the properties of polyacrylonitrile–silver composite nanofiber

Abstract

The effect of dispersion technique, reduction method, and the amount of silver nanoparticles on the properties of composite polyacrylonitrile nanofiber containing silver nanoparticles is analyzed using differential scanning calorimetry, scanning electron microscopy, electrical conductivity, tensile testing, X-ray diffraction, and antimicrobial efficiency measurements.Composite nanofibers reduced by hydrazine hydroxide result in smaller diameter, higher electrical conductivity, higher breaking strength, higher cyclization enthalpy than the samples reduced by xenon arc method. Reduction process results in smaller diameter and higher breaking strength than those of non-reduced nanofiber web containing AgNO 3 nanoparticles. Dispersion by ultrasonic homogenizer/bath provides higher breaking strength, electrical conductivity than the samples dispersed by only magnetic stirrer. An increase of silver nanoparticle generally results in an increase of enthalpy, a decrease of both cyclization temperatures and crystallinity. While 1 wt% AgNO 3 loading is suitable for high breaking strength, 3 wt% AgNO 3 loading is suitable for both high electrical conductivity and antimicrobial properties. Insulator polyacrylonitrile polymer becomes a semiconducting material.

Polyacrylonitrile/polyaniline composite nano/microfiber webs produced by different dopants and solvents

“…The length and width of the specimens were 35 mm and 5 mm, respectively and the gage length was adjusted to 15 mm [11,12,38]. At least 10 specimens were tested for each sample.…”

Polyacrylonitrile-polyaniline composite nanofiber webs: Effects of solvents, redoping process and dispersion technique

“…The tester was equipped with a 100 N load cell and the testing was performed at a crosshead speed of 20 mm/min [18,[38][39][40]. The length and width of the specimens were 35 mm and 5 mm, respectively.…”

“…The length and width of the specimens were 35 mm and 5 mm, respectively. The gauge length was 15 mm [18,39,40]. At least 10 specimens were tested for each sample and average value for the sample was calculated.…”

Polyacrylonitrile/polyaniline composite nanofiber webs with electrostatic discharge properties

“…11,[38][39][40] The length and width of the specimens were 35 mm and 5 mm, respectively. The gage length was 15 mm, and at least 10 specimens were tested for each sample.…”