Glutaraldehyde-Cross-Linked Poly(acrylic acid-co-acrylamide)/Poly(vinyl alcohol) Superabsorbent Membranes

2014 ◽  
Vol 789 ◽  
pp. 194-200
Author(s):  
Man Yi Wang ◽  
Yan Ping Wang ◽  
Yan Ting Yu ◽  
Yi Min Wang ◽  
Jian Hua Ni
Keyword(s):  
Heat Treatment ◽  
Aqueous Solution ◽  
Acrylic Acid ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Water Absorbency ◽  
Solution Polymerization ◽  
Treatment Conditions ◽  
Aqueous Solution Polymerization ◽  
Cross Linker

The superabsorbent membranes were prepared with acrylic acid (AA) and acrylamide (AM) as the monomers, poly (vinyl alcohol) (PVA) as toughening components, potassium persulfate (KPS) as the initiator agent, and glutaraldehyde (GA) as cross-linker by means of aqueous solution polymerization. Their structures were analyzed by FTIR spectroscopy. The effects of synthesis and heat-treatment conditions on water absorbency of superabsorbent membranes were investigated. Their water absorbency with different pH was studied as well. The results showed that the superabsorbent membranes exhibited intelligently pH-responsiveness.

Properties and Synthesis of Kaolin / Potassium Polyacrylate / Acrylamide Composite Superabsorbent Resin

2011 ◽  
Vol 287-290 ◽  
pp. 1331-1334
Author(s):  
Hao Ren ◽  
Jie Li ◽  
Yu Fen Zhang ◽  
Tai Zhong Huang
Keyword(s):  
Aqueous Solution ◽  
Saline Water ◽  
Monomer Concentration ◽  
Water Absorbency ◽  
Solution Polymerization ◽  
Synthetic Resin ◽  
Polymer Molecules ◽  
Aqueous Solution Polymerization ◽  
Crosslinker Concentration ◽  
Superabsorbent Resin

The aqueous solution polymerization methods were used for the synthesis of superabsorbent resin. The effects of different experimental factors on synthetic resin water absorbency were investigated in this paper. The variables examined in this study included monomer concentration, neutralization degree, initiator and crosslinker concentration, reaction temperature and time, etc. The maximum absorbencies of distilled and 0.9% saline water are 919 times and 92 times respectively under optimum condition. Analysis from FTIR and SEM shown the polymer molecules can be firmly fixed with kaolin, the bonding of kaolin and polymer is good in CSR.

Semibatch Aqueous-Solution Polymerization of Acrylic Acid: Simultaneous Control of Molar Masses and Reaction Temperature

2011 ◽  
Vol 5 (5-6) ◽  
pp. 223-231 ◽  
Author(s):  
Roque J. Minari ◽  
Gerardo Caceres ◽  
Paola Mandelli ◽  
Mariana M. Yossen ◽  
Manuel Gonzalez-Sierra ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Acrylic Acid ◽  
Reaction Temperature ◽  
Solution Polymerization ◽  
Simultaneous Control ◽  
Aqueous Solution Polymerization

Synthesis, characterization, and their some chemical and biological properties of PVA/PAA/nPS hydrogel nanocomposites: Hydrogel and wound dressing

2020 ◽  
Vol 35 (3) ◽  
pp. 203-215
Author(s):  
Mehmet Emin Diken ◽  
Berna Koçer Kizilduman ◽  
Begümhan Yilmaz Kardaş ◽  
Enes Emre Doğan ◽  
Mehmet Doğan ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Acrylic Acid ◽  
Infrared Spectra ◽  
Vinyl Alcohol ◽  
Fourier Transform Infrared ◽  
Poly Vinyl Alcohol ◽  
Seed Particles ◽  
Fourier Transform Infrared Spectra ◽  
Hydrogel Nanocomposites ◽  
Poly Acrylic Acid

The nanocomposite hydrogels were prepared by dispersing of the nanopomegranate seed particles into poly(vinyl alcohol)/poly(acrylic acid) blend matrix in an aqueous medium by the solvent casting method. These hydrogels were characterized using scanning electron microscopy, Fourier transform infrared spectra, differential scanning calorimetry, and optical contact angle instruments. The nanopomegranate seed, blend, and hydrogel nanocomposites were tested for microbial activity. In addition, cytocompatibilities of these blend and hydrogel nanocomposites/composites were tested on human lymphocyte with in vitro MTS cell viability assays. Fourier transform infrared spectra revealed that esterification reaction took place among functional groups in the structure of poly(vinyl alcohol) and poly(acrylic acid). The hydrophilic properties of all hydrogels decreased with increasing nanopomegranate seed content. The mean diameters of the nanopomegranate seed particles were about 88 nm. Nanopomegranate seed particles demonstrated antibacterial properties against gram-positive bacteria, Staphylococcus aureus, and gram-negative bacteria, Escherichia coli. The lymphocyte viabilities increased after addition of nanopomegranate seeds into the polymer blend. The swelling behavior of blend and hydrogels was dependent on the cross-linking density created by the reaction between poly(vinyl alcohol)/poly(acrylic acid) blend and nanopomegranate seed. Scanning electron microscopy images were highly consistent with Fourier transform infrared spectra, differential scanning calorimetry, and antibacterial activity results.

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