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Title: Needleless electrospinning of poly (acrylic acid) superabsorbent: Fabrication, characterization and swelling behavior
Journal: Polymer Testing
Author: 1. Esmaeil Ranjbari, 1,2. Saeed Bazgir, 3,4. Mohammad Mahdi A. Shirazi
Year: 2020
Address: 1. Nanopolymer Research Laboratory (NPRL), Sheikh Bahaei Research Complex, Science and Research Branch, Islamic Azad University, Tehran, Iran 2. Department of Polymer Engineering, Faculty of Petroleum and Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran 3. Chemical Engineering Department, Faculty of Engineering, University of Kashan, Kashan, Iran 4. Membrane Industry Development Institute, Tehran, Iran
Abstract: In this work, nanofibrous hydrogel has been fabricated from needleless electrospinning of Poly(acrylic acid) (PAA) in an aqueous solution with different concentrations. First, all solution samples were characterized for pH, surface tension, conductivity and viscosity. Next, electrospinnability of the PAA-water dope solution was investigated using the needleless electrospinning technique under constant conditions. Results indicated that the PAA-water solution was not electrospinnable. Therefore, the neutralization of carboxylic groups in the PAA chemical structure using the NaOH solution was investigated to enhance the PAA electrospinnability. Morphology observation revealed that the fiber diameters ranged from 40 to 250 nm and increased with increasing the solution concentrations. Increasing the neutralization degree (10%, 15% and 20% with 50 wt% NaOH solution) led to increase the dope viscosity and conductivity. The resultant nanofibers could be rendered water-insoluble by incorporating 1,4-butanediol diglycidyl-ether in the PAA-water dope solution, then heat-induced crosslinking was performed using a microwave at different curing times (1–5 min) and temperatures (45–105 °C). The nanofibrous hydrogel mat was then characterized by FTIR. The resulting nanofibrous hydrogel showed remarkable water absorption capacity up to 17,000% and 51,000% (within 15 min) in the standard saline solution and distilled water, respectively.
Keywords: Poly(acrylic acid), PAA, Superabsorbent, Needleless electrospinning, Water absorption
Application: Absorbent
Product Model 1: Electroris
Product Model 2:
URL: #https://www.sciencedirect.com/science/article/abs/pii/S0142941819322214#