Influence of Hydrogels Initial State on their Electrochemical and Volume-Gravimetric Properties in Intergel System Polyacrylic Acid Hydrogel and Poly-4-vinylpyridine Hydrogel

Jumadilov, Т. K.; Abilov, Zharylkasyn A.; Kondaurov, R. G.; Himersen, H.; Yeskalieva, Gaukhar; Akylbekova, Moldir; Akimov, A G

doi:10.23939/chcht09.04.459

Cited by 10 publications

(10 citation statements)

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“…Hydrogels are obtained both from natural organic raw materials [22][23][24] and from synthetic polymers. [25][26][27][28][29] Hydrogels based on poly-2-hydroxyethyl methacrylate (pHEMA) 30 and its copolymers 31,32 are distinguished from a wide range of synthetic highly hydrophilic polymers. pHEMA and its copolymers are characterized by a high degree of water absorption, the ability to absorb low molecular weight substances, high biocompatibility, and low thrombogenicity.…”

Section: Introductionmentioning

confidence: 99%

Improving the Long-Term Performance of Poly(Vinyl Chloride)

Brostow¹,

Fałtynowicz²,

Hnatchuk³

et al. 2022

ChChT

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Since neat PVC is rigid, in all applications a plasticizer is added. Migration of the plasticizer results in brittleness of flexible PVC and environmental pollution. We have used three types of cross-linking agent blended with commercial PVC, plasticizer and thermal stabilizer. Heat treatments at 100С, 121С and 136C were performed. We made tensile tests, dynamic friction tests, wear rate determination, scratch resistance determination, water absorption tests and SEM analysis – to make selection of compositions suitable for sufficient cross-linking for long term applications.

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Section: Introductionmentioning

confidence: 99%

Improving the Long-Term Performance of Poly(Vinyl Chloride)

Brostow¹,

Fałtynowicz²,

Hnatchuk³

et al. 2022

ChChT

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“…Based on our previous research [21] related to intergel systems, we decided to choose KU-2-8 and AV-17-8 ion exchangers for this study due to their availability and low cost. The combination of ion exchangers into an interpolymer system "KU-2-8-AV-17-8" with different molar ratios can be applied to investigate the remote interaction effect [22] on improving the process of cerium ions sorption. Due to the mutual activation of polymers during their remote interaction, they pass into a highly ionized state, which leads to a significant increase in the degree of metal ions sorption by the interpolymer system compared to the individual polymers.…”

Section: Introductionmentioning

confidence: 99%

Ion Exchange Dynamics in Cerium Nitrate Solution Regulated by Remotely Activated Industrial Ion Exchangers

et al. 2021

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Many technological solutions contain valuable components as waste and can become an additional source of rare-earth elements to meet the needs of modern production. The development of technologies based on commercially available and cheap sorbents reveals the possibility for rare earth recovery from various solutions. This paper provides research on using a combination of KU-2-8 and AV-17-8 ion exchangers in different molar ratios for cerium ions sorption from its nitrate solution. The mutual activation of the ion exchangers in an aqueous medium provides their transformation into a highly ionized state by the conformational and electrochemical changes in properties during their remote interaction. The ion exchange dynamics of solutions were studied by the methods of electrical conductivity, pH measurements, and atomic emission analysis of the solutions. The research showed that the maximum activation of polymers was revealed within the molar ratio of KU-2-8:AV-17-8 equal to 3:3. In more detail, in comparison to AV-17-8, this interpolymer system showed an increase in the sorption degree by more than 1.5 times after 6 h of interaction. Moreover, compared with KU-2-8, the same interpolymer system showed an increase in the degree of cerium ions sorption by seven times after 24 h of interaction. As a result, the total cerium ions sorption degree after 48 h of sorption by individual KU-2-8 and AV-17-8 was 38% and 44%, respectively, whereas the cerium ions sorption degree by the same interpolymer system in the molar ratio 3:3 became 51%. An increase in the sorption degree of cerium ions by the interpolymer system in comparison with individual ion exchangers can be explained by the achievement of a high ionization degree of ion exchangers being activated in the interpolymer system by the remote interaction effect.

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“…In other words, the main disadvantage of an ion exchanger is that it can be used to remove only one specific metal from a solution. Earlier [41], a new phenomenon of the influence of two rare-crosslinked polymer hydrogels of different nature, placed in a common aqueous medium and separated by a microporous filter (excluding their direct contact) was discovered and called the "long-range effect" (remote interaction phenomenon) [42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Impact of Neodymium and Scandium Ionic Radii on Sorption Dynamics of Amberlite IR120 and AB-17-8 Remote Interaction

Jumadilov¹,

Totkhuskyzy

Malimbayeva

et al. 2021

Materials

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The aim of the work is to provide a comparative study of influence of ionic radii of neodymium and scandium ions on their sorption process from corresponding sulfates by individual ion exchangers Amberlite IR120, AB-17-8 and interpolymer system Amberlite IR120-AB-17-8. Experiments were carried out by using the following physicochemical methods of analysis: conductometry, pH-metry, colorimetry, and atomic-emission spectroscopy. Ion exchangers in the interpolymer system undergo remote interactions with a further transition into highly ionized state. There is the formation of optimal conformation in the structure of the initial ion exchangers. A significant increase of ionization of the ion-exchange resins occurs at molar ratio of Amberlite IR120:AB-17-8 = 5:1. A significant increase of sorption properties is observed at this ratio due to the mutual activation of ion exchangers. The average growth of sorption properties in interpolymer system Amberlite IR120:AB-17-8 = 5:1 is over 90% comparatively to Amberlite IR120 and almost 170% comparatively to AB-17-8 for neodymium ions sorption; for scandium ions sorption the growth is over 65% comparatively to Amberlite IR120 and almost 90% comparatively to AB-17-8. A possible reason for higher sorption of neodymium ions in comparison with scandium ions is maximum conformity of globes of internode links of Amberlite IR120 and AB-17-8 after activation to sizes of neodymium sulfate in an aqueous medium.

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Influence of Hydrogels Initial State on their Electrochemical and Volume-Gravimetric Properties in Intergel System Polyacrylic Acid Hydrogel and Poly-4-vinylpyridine Hydrogel

Cited by 10 publications

References 0 publications

Improving the Long-Term Performance of Poly(Vinyl Chloride)

Improving the Long-Term Performance of Poly(Vinyl Chloride)

Ion Exchange Dynamics in Cerium Nitrate Solution Regulated by Remotely Activated Industrial Ion Exchangers

Impact of Neodymium and Scandium Ionic Radii on Sorption Dynamics of Amberlite IR120 and AB-17-8 Remote Interaction

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