Hydroxyethyl chitosan-g-poly(acrylic acid-co-sodium acrylate) superabsorbent polymers

Tara gum/silver composite superabsorbent polymers were synthesized with tara gum grafted poly(acrylic acid), using K2S2O8 (KPS) as an initiator and N,N′-methylenebisacrylamide (MBA) as a cross-linker. The products were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The results showed that the silver ions were partially reduced to Ag0 and the amorphous nanoparticles containing Ag0 and Ag2O were around 10~50 nm in size The tara gum/silver composite superabsorbent polymers exhibited an interconnected porous structure with strong water absorption capacity. The swelling ratio of each product could reach 473 g/g in distilled water and 62 g/g in 0.9% NaCl solution. The antimicrobial activity of the samples against Staphylococcus aureus and Escherichia coli increased with the addition of AgNO3 from 0 to 125 mg. This work indicates that the developed tara gum/silver composite superabsorbent polymers can be potentially used for biomedical applications.

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Synthesis, Characterization, and Swelling Behaviors of Poly(acrylic acid-co-acrylamide)/Pozzolan Superabsorbent Polymers

Journal of Polymers and the Environment ◽

10.1007/s10924-019-01415-0 ◽

2019 ◽

Vol 27 (5) ◽

pp. 1086-1095 ◽

Cited By ~ 1

Author(s):

Ismail Anil ◽

Seyda Tugba Gunday ◽

Omar Alagha ◽

Ayhan Bozkurt

Keyword(s):

Acrylic Acid ◽

Superabsorbent Polymers ◽

Swelling Behaviors ◽

Poly Acrylic Acid

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Nanoscale Elastic and Tribological Properties of Poly(Acrylic Acid) Superabsorbent Gels

MRS Proceedings ◽

10.1557/proc-1085-t05-03 ◽

2008 ◽

Vol 1085 ◽

Author(s):

Beatriz Talavera ◽

Juan J. Martínez ◽

Francisca Santiago ◽

M. Teresa Cuberes

Keyword(s):

Acrylic Acid ◽

Sodium Hydroxide ◽

Sodium Acrylate ◽

Water Molecules ◽

Friction Force Microscopy ◽

Ambient Conditions ◽

Force Microscopy ◽

Topographic High ◽

Poly Acrylic Acid

ABSTRACTUltrasonic Force Microscopy and Friction Force Microscopy have been applied to the characterization of the elastic and tribological responses of poly(acrylic acid) hydrogels at ambient conditions. The gels were prepared by free radical polymerization of acrylic acid monomers partially neutralized by sodium hydroxide, using N, N'-methylen-bis-acrylamide as a crosslinker. Nanoscale domains with different stiffness and friction are observed. Increasing the amount of crosslinker leads to the formation of smaller, more densely packed domains. The domains with higher stiffness also exhibit higher friction and lower topographic high. The results can be understood by assuming that (i) neutralization by sodium hydroxide leads to the formation of both acrylic acid and sodium acrylate polymeric strands (ii) the observed domains differ in their acrylic acid / sodium acrylate content. In the acrylic acid rich domains, hydrogen bonding among the polymeric strands explains a higher stiffness and lower topography. In the sodium acrylate rich domains, lubrication by water molecules linked by solvation to the sodium counterions accounts for a lower friction.

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