Investigation of polyacrylonitrile electrospun nanofibres morphology as a function of polymer concentration, viscosity and Berry number

Nasouri, Komeil; Shoushtari, Ahmad Mousavi; Kaflou, Ali

doi:10.1049/mnl.2012.0054

Cited by 42 publications

(40 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Changes in the average diameter of the various nanofiber samples versus increasing the PMMA concentration are shown in Fig. Experimental and theoretical analyses 15,16 have shown that the electrospun nanofiber diameter (d) has a power relationship with the polymer concentration of solution (C): d ∝ C β . The statistical analysis revealed that the sizes of nanofibers containing various PMMA concentrations are significantly different from each other.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Poly(methyl methacrylate) Nanofibers and Polyethylene Nonwoven with Sandwich Structures for Thermal Insulator Application

2014

View full text Add to dashboard Cite

The effects of variation in average nanofibers diameter and surface density of nanofibers web on thermal conductivity of poly(methyl methacrylate) (PMMA) nanofibers web are investigated in this paper. With an increase in the concentration of PMMA in the solution from 18 to 26 w/v%, the mean diameter of nanofibers increased from 73 ± 16 to 968 ± 97 nm. The results demonstrate that the use of thinner PMMA nanofibers results in a lower limit of thermal conductivity and better thermal insulation performance that means lower radiative conductivity. It can be related to a higher specific surface of thinner PMMA nanofibers that means more surface area for radiative scatter and absorption lead to lower conductivity. With increasing surface density of PMMA nanofibers web, the thermal conductivity was reduced and water vapor transmission rate and thermal insulation ability were improved. Higher porosity percentage and smaller pore sizes in the web with higher surface density could result in lower thermal conductivity. C

show abstract

Section: Resultsmentioning

confidence: 99%

Fabrication of Poly(methyl methacrylate) Nanofibers and Polyethylene Nonwoven with Sandwich Structures for Thermal Insulator Application

2014

View full text Add to dashboard Cite

show abstract

“…The average diameters of nanofiber samples produced from solutions with viscosity of 739±14, 402±9, and 311±5 cP were 617±109, 531±48, and 489±47 nm, respectively. When the viscosity is increased which means that there is a higher amount of polymer chains entanglement in the solution, the charges on the electrospinning jet will be unable to fully stretch the solution, consequently, the diameter of nanofibers will increase [20]. So, a direct correlation has been observed between uniform fiber diameter and solution viscosity [21].…”

Section: Pure Nanofibers Morphologymentioning

confidence: 99%

Enhancement in glass transition and tensile properties of PMMA nanofibres by incorporation of MgCl2 in the electrospun polymer solution

2015

View full text Add to dashboard Cite

In this study, an effective approach for enhancing the glass transition and mechanical properties of poly(methyl methacrylate)(PMMA) composite nanofibers by incorporation of MgCl 2 in the electrospun solutions has been presented. Pure PMMA and various compositions of MgCl 2 /PMMA nanofibers were successfully fabricated by electrospinning process under optimized conditions. SEM images indicated that the nanocomposite sample containing 1 wt% MgCl 2 has the lowest average diameter with narrow distribution. According to FTIR spectra of the fabricated composites, considerable increase in absorption intensity of most bands were indicated while clear shift from 1728 cm -1 to 1735 cm -1 related to carbonyl group has been identified. DSC thermograms demonstrated 10 o C to 25 o C enhancement in the glass transition temperature for various nanocomposite samples. The results of the mechanical properties of the composite nanofibers sample with 1 wt% MgCl 2 revealed an enhancement in the tensile strength of ~151 % from 0.78±0.08 MPa to 1.96±0.10 MPa, and an increase in the modulus has been seen by ~236 % from 27.48±4.20 MPa to 92.25±8.50 MPa, as compared to the pure PMMA nanofibers.

show abstract

“…The surface morphology and the diameter of electrospun nanofibers depend on several variables. These variables are classified as polymer properties (molecular weight [9,10] and solubility [11]), polymer solution characteristics (polymer concentration [12], solution viscosity [10], conductivity [13], and surface tension [13]), processing conditions (applied voltage [14], nozzle-collector distance [14], feed rate [15], and needle diameter [16]), and ambient variables (temperature [17], and relative humidity [18]). As described in the literature [12,14,15], the properties of the polymer solution and processing conditions such as polymer concentration, applied voltage, and nozzle-collector distance have the most significant variables influence in the electrospinning process and the resultant nanofiber morphology, when compared with other variables.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of effective electrospinning parameters controlling polyvinylpyrrolidone nanofibers surface morphology via response surface methodology

2015

View full text Add to dashboard Cite

Electrospinning process is a very important technique for fabricating polymeric nanofibers by applying external electrostatic forces. This study reports on the modeling of the electrospinning process of polyvinylpyrrolidone (PVP), using response surface methodology (RSM) based on the central composite design (CCD). The individual and the interaction effects of the most effective variables such as PVP concentration (10, 14 and 18 wt%), applied voltage (13, 17 and 21 kV), nozzle-collector distance (10, 15 and 20 cm) and solvent type (N,N-dimethylformamide (DMF) and ethanol) on the average and coefficient of variation of the nanofiber diameter were investigated in the optimization section. The CCD analysis confirmed that solvent type and PVP concentration were the main significant variables affecting the average PVP nanofiber diameters. The predicted nanofiber diameters were in good agreement with the experimental results according to CCD technique. High regression coefficient between the variables and the mean diameter (R 2 =0.9468) indicates excellent evaluation of experimental data by quadratic polynomial regression model. The RSM model predicted the 166 nm value of the finest nanofiber diameter with high uniformity at conditions of 13 wt% PVP concentration, 15 kV of the applied voltage, and 20 cm of nozzle-collector distance with used DMF for solvent in electrospinning process. The predicted value (166 nm) showed only 3.47 %, difference with experimental results in which 172 nm at the same setting were observed. The obtained CCD results confirmed that the selected RSM model presented appropriate performance for evaluating the involved variables and prediction of PVP nanofibers surface morphology.

show abstract

Investigation of polyacrylonitrile electrospun nanofibres morphology as a function of polymer concentration, viscosity and Berry number

Cited by 42 publications

References 16 publications

Fabrication of Poly(methyl methacrylate) Nanofibers and Polyethylene Nonwoven with Sandwich Structures for Thermal Insulator Application

Fabrication of Poly(methyl methacrylate) Nanofibers and Polyethylene Nonwoven with Sandwich Structures for Thermal Insulator Application

Enhancement in glass transition and tensile properties of PMMA nanofibres by incorporation of MgCl2 in the electrospun polymer solution

Evaluation of effective electrospinning parameters controlling polyvinylpyrrolidone nanofibers surface morphology via response surface methodology

Contact Info

Product

Resources

About