Crosslinked poly(sodium acrylate) hydrogels

Buchanan, K.J.; Hird, B.; Letcher, Trevor M.

doi:10.1007/bf00254851

Cited by 64 publications

(40 citation statements)

References 5 publications

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“…Buchanan et al 41 have plotted the water retenfor 1 day before any tests. All of the samples were tion of polyacrylate networks as a function of the used with a particle size in the range of 60-100 degree of neutralization, and a swelling maximum mesh.…”

Section: Methodsmentioning

confidence: 99%

“…Buchanan et al 41 reported that all univalent cationic species of the same concentration had a similar effect on the water absorbency of the poly(SA) gel (i.e., the effect is independent of the radius of the cation or the nature of the anion). Similarly, all multivalent cations of the same charge concentration influenced the swelling of the gel to the same extent.…”

Section: Influence Of Different Cations With a Common Anion (Cl 0 ) Omentioning

confidence: 96%

“…Similar results were also observed from our previous report and conformed to the formation constant of complexation. 27,41,43 The order at a higher ionic strength for the two gels having carboxylate groups can be interpreted by the formation constants of complexation. The logarithm of formation constants of the ethylenediaminetetraacetic acid (EDTA) with multivalent cations at 0.1M are 16.31, 18.62, and 18.80 for Co 2/ , Ni 2/ , and Cu 2/ , respectively.…”

Section: Influence Of Different Cations With a Common Anion (Cl 0 ) Omentioning

confidence: 99%

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Superabsorbent polymeric materials. IV. Swelling behavior of crosslinked poly [sodium acrylate-co-N,N-dimethyl (acrylamidopropyl) ammonium propane sulfonate] in aqueous salt solution

Lee

Yeh

1997

J. Appl. Polym. Sci.

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A series of xerogels based on sodium acrylate (SA), N,N-dimethyl(acrylamidopropyl) ammonium propane sulfonate (DMAAPS), and N,N-methylene bisacrylamide (NMBA) were prepared by inverse suspension polymerization. The water absorbency or swelling behavior for these xerogels in water or various saline solutions was investigated. Results obtained from this study revealed a water absorbency of 721 g H 2 O/g sample in deionized water and 83 g H 2 O/g sample in 0.9 wt % NaCl solution for a gel containing a 1.50 1 10 02 molar fraction of DMAAPS. The absorbency in the chloride salt solutions decreased with an increase in the ionic strength of the salt. For the same ionic strength of various salt solutions, the swelling amount had the following tendency: Co 2/ ú Ni 2/ ú Cu 2/ for the higher ionic strength of 2.44 1 10 05 -1.8 1 10 02M. The Co 2/ , Ni 2/ , and Cu 2/ solutions induce approximately the same degree of swelling at the lower ionic strength of õ2.44 1 10 05 M. The pH effect on the water absorbency for these xerogels was also investigated.

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Section: Methodsmentioning

confidence: 99%

Section: Influence Of Different Cations With a Common Anion (Cl 0 ) Omentioning

confidence: 96%

Section: Influence Of Different Cations With a Common Anion (Cl 0 ) Omentioning

confidence: 99%

See 1 more Smart Citation

Superabsorbent polymeric materials. IV. Swelling behavior of crosslinked poly [sodium acrylate-co-N,N-dimethyl (acrylamidopropyl) ammonium propane sulfonate] in aqueous salt solution

Lee

Yeh

1997

J. Appl. Polym. Sci.

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“…Buchanan et al 35 reported that all univalent cationic species of the same concentration have a similar effect on the water absorbency of the poly(SA) gel, that is, independent of the radius of the cation or the nature of the anion. Similarly, all multivalent cations of the same charge concentration influenced the swelling of the gel to the same extent.…”

Section: Water Absorbency Of Crosslinked Poly( S a ) (He 1) In Varioumentioning

confidence: 96%

Superabsorbent polymeric materials. I. Swelling behaviors of crosslinked poly(sodium acrylate-co-hydroxyethyl methacrylate) in aqueous salt solution

Lee

1996

J. Appl. Polym. Sci.

162

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SYNOPSISA series of crosslinked poly(sodium acrylate-co-hydroxyethyl methacrylate) based on sodium acrylate (SA), 2-hydroxyethyl methacrylate (HEMA), and N,N-methylene-bis-acrylamide (NMBA) are prepared by inverse suspension polymerization. The resultant crosslinking polymers are xerogellants. This work investigates not only the absorbency or swelling behavior for these xerogellants composed of different ratios of HEMA/SA in water, but also the effects of various salts and p H values on the swelling properties. Experimental results indicate that the absorbency in deionized water decreases with an increase in the HEMA in copolymeric gel, which is related to the degree of expansion of the network and the strength of the hydrophilic group. The absorbency in the chloride salt solutions decreases with an increase in the salt concentration (swelling is 50 times for the IA group chloride salt solutions, but is less than 5 times for the IIA group salt solution), owing to the osmosis of water and ions between the polymeric gel and the external solution. A decrease in the extent of swelling occurs for divalent and trivalent chloride salt solutions. For the salt solutions of the same ionic strength, the swelling amount has the following tendency:LiCl(aq) = NaCl(aq) = KCl(aq), CaCl,(aq) < SrCl,(aq) < BaCl,(aq), and Fe3+ > Ca2+ > Zn2+ > Cu2+. These orders are related to the complexing ability between metallic cations and the carboxylate group in the polymeric chains. Finally, the adsorption of ferric ion by these gels is also investigated.

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“…This is also in accordance with several previous investigations. 9,18,24 Table II also shows the water absorbencies of PAA-AM/KHA and PAA-AM in bivalent solutions (CaCl 2(aq) and MgCl 2(aq) ). The water absorbency of PAA-AM/KHA and PAA-AM decreases with the increase in the concentration, and PAA-AM/KHA acquires higher water absorbency in bivalent salt solutions of the same concentration in comparison with PAA-AM.…”

Section: Water Absorbency In Various Saline Solutionsmentioning

confidence: 99%

Influence of potassium humate on the swelling properties of a poly(acrylic acid‐co‐acrylamide)/ potassium humate superabsorbent composite

Chu

Zhu

Huang

et al. 2007

J of Applied Polymer Sci

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A novel superabsorbent composite, poly (acrylic acid-co-acrylamide)/potassium humate (PAA-AM/ KHA), was prepared by aqueous solution polymerization from acrylic acid, acrylamide, and potassium humate (KHA) with N,N 0 -methylenebisacrylamide as a crosslinker and potassium peroxydisulfate as an initiator. The effects of incorporated KHA on the water absorbency, swelling rate, and reswelling capability were investigated. The swelling property of PAA-AM/KHA in various saline solutions was studied systematically. The results show that the comprehensive properties and especially salt-resistant ability of PAA-AM/KHA were enhanced. There was a linear relationship between the saturated water absorbency and the minus square root of the ionic strength of the external medium, and the water absorbency of PAA-AM/ KHA in various salt solutions had the following order: FeCl 3(aq) . Moreover, the polymeric net structure of PAA-AM/KHA was examined with respect to that of poly(acrylic acid-co-acrylamide). The results indicate that the polymeric net of PAA-AM/KHA was improved by the introduction of a moderate amount of KHA into the superabsorbent composite and made more suitable for agriculture and horticulture applications.

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Crosslinked poly(sodium acrylate) hydrogels

Cited by 64 publications

References 5 publications

Superabsorbent polymeric materials. IV. Swelling behavior of crosslinked poly [sodium acrylate-co-N,N-dimethyl (acrylamidopropyl) ammonium propane sulfonate] in aqueous salt solution

Superabsorbent polymeric materials. IV. Swelling behavior of crosslinked poly [sodium acrylate-co-N,N-dimethyl (acrylamidopropyl) ammonium propane sulfonate] in aqueous salt solution

Superabsorbent polymeric materials. I. Swelling behaviors of crosslinked poly(sodium acrylate-co-hydroxyethyl methacrylate) in aqueous salt solution

Influence of potassium humate on the swelling properties of a poly(acrylic acid‐co‐acrylamide)/ potassium humate superabsorbent composite

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