Role of Macromolecular Factor in Polymer Solution Electrospinning Process

2017 ◽  
Vol 49 (3) ◽  
pp. 151-160
Author(s):  
Yu. N. Filatov ◽  
I. Yu. Filatov ◽  
M. A. Smul’skaya
Keyword(s):  
Polymer Solution ◽  
Electrospinning Process ◽  
Solution Electrospinning

scholarly journals On the Nature of Electric Current in the Electrospinning Process

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Baturalp Yalcinkaya ◽  
Fatma Yener ◽  
Oldrich Jirsak ◽  
Funda Cengiz-Callioglu
Keyword(s):  
Polymer Solution ◽  
Electric Current ◽  
Electrospinning Process ◽  
Charge Carriers ◽  
Electric Currents

The electric currents between electrodes in the electrospinning process are based on the movement of charge carriers through the spinning space. The majority of the charge carriers are formed by ionization of the air close to the metallic needle and to the polymer jet. The salt contained in the polymer solution contributes to the concentration of charge carriers, depending on its amount. The conductivity of polymer jets does not significantly affect the current since the jets do not link the electrodes.

Study of Preparation Metallocene Based LLDPE Extra-Fibers by Melt Electrospinning Process

2012 ◽  
Vol 512-515 ◽  
pp. 2424-2427
Author(s):  
Na Zhao ◽  
Tai Qi Liu ◽  
Rui Xue Liu
Keyword(s):  
Field Strength ◽  
High Viscosity ◽  
Electrospinning Process ◽  
Electrospun Fibers ◽  
Optimal Parameters ◽  
Common Solution ◽  
Melt Electrospinning ◽  
Fine Fiber ◽  
Electrospinning Method ◽  
Solution Electrospinning

In this paper, metallocene based LLDPE (mLLDPE) extra-fine fiber , which can not be processed by a common solution electrospinning method.was successfully prepared via a melt electrospinning method. First, a self-designed melt electrospinning device was manufctured and it was used to produce mLLDPE fibers . Then LLDPE extra-fine fiber was successfully prepared by addition of viscosity-reducing additive such as wax, and the resulted fiber was charctered by SEM. Last, the optimal parameters for the preparation of mLLDPE fiber was determined. The experimental results show that commercial mLLDPE can hardly be processed to fibers because of its high viscosity. The diameter and morphology of resulted mLLDPE electrospun fibers depend on the electrospinning parameters such as electric field strength and collecting distance.

Polymer Nanofibrous Material for Enzyme Immobilization

2018 ◽  
Vol 937 ◽  
pp. 129-135
Author(s):  
Lenka Martinová ◽  
Josef Novák
Keyword(s):  
Polymer Solution ◽  
Enzyme Immobilization ◽  
Fiber Diameter ◽  
Polyamide 6 ◽  
Solvent System ◽  
Electrospinning Process ◽  
Natural Polymers ◽  
Chitosan Nanofiber ◽  
External Conditions ◽  
Nanofiber Sheets

NanospiderTMmethod allows preparation of nanofiber sheets with desired specific mass and fiber diameter between 100-600 nm. The fiber diameter can be modified by solvent system, concentration of polymer solution, and external conditions of the electrospinning process, in particular by air humidity and temperature. We have long experience with continual electrospinning from free surface of the polymer solution and in this case we focus on polymer blend polyamide 6/chitosan nanofiber form. Chitosan is an excellent material providing biocompatibility and numerous primary amine groups. On the other hand, polyamide 6 is well known and easy-to-prepare stable polymer guaranteeing sufficient mechanical properties. Blend nanofibers containing synthetic and natural polymers are usually difficult to continuously prepare. Natural polymer bring certain inhomogeneity due to varying chemical and physical properties of each brew. We compared chitosan from four different suppliers and finally fabricated homogenous and long-term stable layers. Successfully prepared nanofiber sheets were used as a support for enzyme immobilization. We showed that our layers can be used as a carrier for numerous biomolecules.

Nanofibrous morphology of electrospun chitosan nanocomposites reinforced with WS2 nanotubes: A design-of-experiments study

2017 ◽  
Vol 48 (1) ◽  
pp. 119-145 ◽  
Author(s):  
Apostolos Baklavaridis ◽  
Ioannis Zuburtikudis ◽  
Costas Panayiotou
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Polymer Solution ◽  
Electric Field Strength ◽  
Response Surface ◽  
Solution Concentration ◽  
Electrospinning Process ◽  
Electron Microscopic ◽  
Inorganic Nanotubes ◽  
The Individual

Chitosan nanofibers reinforced with tungsten disulfide inorganic nanotubes (INT-WS2) were fabricated in this study. The aim was to investigate the effect of the material parameters and the electrospinning process parameters on the obtained nanofibrous morphology of the mats. The INT-WS2 content, the polymer solution concentration, the electric field strength, and the solution's flow rate were the investigated factors within the framework of response surface methodology. Scanning electron microscopic and image analysis were used for the dimensional characterization of the nanofibrous morphology and the estimation of three selected responses. Two responses were related to the quality of the nanofibrous morphology: the number surface density of the beads ( Nbead) and the average bead-to-fiber diameter ( Dbead/ Dfiber). The third response was indicative of the fiber thickness ( Dfiber). The developed models as well as the coupling and the individual effects of the four investigated factors are given. The results indicate that the electrospun nanofibrous morphology is mostly affected by the polymer solution concentration, the electric field strength and the INT-WS2 loading. Furthermore, the response-surface results reveal possible experimental pathways that may be followed in order to obtain specified nanofibrous chitosan/INT-WS2 morphologies.

Preparation of Chitosan based Nanofibers: Optimization and Modeling

2016 ◽  
Vol 14 (1) ◽  
pp. 283-288 ◽  
Author(s):  
K. Thirugnanasambandham ◽  
V. Sivakumar
Keyword(s):  
Polymer Solution ◽  
Response Surface ◽  
Applied Voltage ◽  
Solution Concentration ◽  
Electrospinning Process ◽  
Interactive Effects ◽  
Optimum Process ◽  
Process Conditions ◽  
Good Correspondence ◽  
Nanofiber Diameter

AbstractThe main objective of the present study is to prepare a chitosan based nanofiber and model the electrospinning process using response surface methodology (RSM). The electrospinning parameters such as collector distance, polymer solution concentration and applied voltage were optimized by using three-variable-three-level Box–Behnken design (BBD). Based on RSM analysis, second order polynomial equation was formed and it indicated good correspondence between experimental and predicted values. 3D response surface plots were used to study the individual and interactive effects of process variables on chitosan based nanofiber diameter. The optimum process conditions for the minimum chitosan based nanofiber diameter (0.3 µm) were found to be collector distance of 12 cm, polymer solution concentration of 25% and applied voltage of 6 kV.

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