Ultraviolet photopolymerization and performances of fast‐water absorbing sodium polyacrylate

Dolat, Banugul; Sawut, Amatjan; Yimit, Mamatjan; Nurulla, Ismayil

doi:10.1002/app.42787

Cited by 9 publications

(3 citation statements)

References 19 publications

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“…A series of super absorbent resins have been prepared by our research group via UV initiated polymerization using initiators and cross‐linkers over the years 28–30 . In previous studies, 31 it was found that the super absorbent resins prepared by UV photo polymerization without any cross‐linking agents and initiators had higher water absorption and salt resistance, however, the water absorption ability of each batch of resins fluctuated greatly. Therefore, the polymerization and crosslinking mechanisms and experimental conditions of this polymerization method needed to be further explored, which is of great significance to the future development of high‐performance superabsorbent hydrogels.…”

Section: Introductionmentioning

confidence: 99%

Preparation, properties, self crosslinking mechanism, and characterization of UV initiated polyacrylic acid superabsorbent resins

Sawut

Simayi

Zhang

et al. 2022

Polymers for Advanced Techs

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The self crosslinking polyacrylic acid (PAAsc) superabsorbent resins were prepared by UV irradiation without crosslinking agents and initiators. The effects of reaction factors on water absorbency and gel content of resins were investigated. The mechanism of self crosslinking polymerization was studied by means of 1H NMR and ESR, while the structure and morphology of the resins were characterized by IR, NMR, and SEM. The results show that the polymerization mechanism and structure of PAAsc superabsorbent resins polymerized through light radiation is significantly different from those polymerized by initiators. The main chain of PAAsc contains double bonds and polar functional groups such as ether groups and ester groups, which improves the hydrophilicity of the main chain and significantly improves the liquid absorption ability of the superabsorbent material. Moreover, the swelling kinetics, salt‐resistance, pH sensitivity, and water retention capacity of the PAAsc superabsorbents were studied. Owing to the remarkable water absorbency, salt resistance property and water retention capacity, this superabsorbent material has a broad application prospect in agriculture.

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Section: Introductionmentioning

confidence: 99%

Preparation, properties, self crosslinking mechanism, and characterization of UV initiated polyacrylic acid superabsorbent resins

Sawut

Simayi

Zhang

et al. 2022

Polymers for Advanced Techs

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“…Meanwhile, the concentration of the fixed ions and sodium ions in the polymeric network gels increased because of the electrostatic interactions between the negatively charged anionic–nonionic surfactant and the positively charged sodium ions. According to Flory's theory, the high osmotic pressure is related to the high ionic concentration in polymeric network gels. The high osmotic pressure resulted in the rapid diffusion of water from the outside to the inside of the particles.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of a fast‐swelling superabsorbent resin by inverse suspension polymerization

Zhang

et al. 2017

J of Applied Polymer Sci

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A novel, fast-swelling superabsorbent polymer (SAP2) was fabricated with an anionic-nonionic surfactant [poly(oxy-1,2ethanediyl)-(3-carboxy-1-oxo-3-sulfopropyl)-(nonylphenoxy) sodium salt] as the stabilizer by inverse suspension polymerization. The microstructure, chemical structure, and gel strength of the superabsorbent polymers (SAPs) were characterized by scanning electron microscopy, porosity, and specific surface area analysis, Fourier transform infrared spectroscopy, and rheometry. The results show that SAP2 had irregularly shaped particles with a large number of pores and presented a greater specific surface area, pore volume, and gel strength than the prepared SAP1 with a nonionic surfactant (Span 60) as the stabilizer. The amount of residual monomer and the gel fraction of SAP2 were 202 mg/kg and 80.6%, respectively. Meanwhile, SAP2 demonstrated a faster swelling and deswelling rate as well as greater water absorbency than SAP1. The fast swelling rate mainly resulted from the capillary effect of the pores in the irregularly shaped particles. Superfast swelling SAPs should possess outstanding potential for healthcare products, communication cables, and the biomedical field.

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“…In this study, on the basis of our previous work, − the HPMC- g -PAA superabsorbent resin with multifunction of water absorption, water retention and biodegradability was successfully prepared, and the influences of the weight ratio of HPMC/AA, the amount of MBA, irgacure-2959 and urea and the neutralization degree on the properties of the material were studied, and the HPMC- g -PAA/urea composite with slow-release fertilizer was prepared on the optimized synthesis conditions. We anticipate that the combination of PAA and HPMC can enhance water absorbency, improve the functionality of controlled-release fertilizers, and enhance the biodegradability of synthesized superabsorbent polymers.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Hypromellose-Graft-Polyacrylic Acid Superabsorbent Resin by Ultraviolet Polymerization and Its Slow-Release Performance

Zhu,

Sawut,

Simayi

et al. 2024

ACS Appl. Polym. Mater.

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A hypromellose-graft-poly(acrylic acid) (HPMC-g-PAA) superabsorbent resin was synthesized through the graft polymerization of hydroxypropyl methylcellulose and acrylic acid in an aqueous solution by UV polymerization, with the addition of an initiator and cross-linking agent. Additionally, the HPMC-g-PAA/urea composite was synthesized by using a one-pot method to create a slow-release fertilizer by incorporating urea into the structure of superabsorbent materials. The structures of HPMC-g-PAA and HPMC-g-PAA/urea were characterized by FTIR, TGA and SEM. The effects of preparation conditions such as UV exposure time, HPMC content, neutralization degree, initiator amount, amount of cross-linking agent, and urea content on the water absorption capacity of the superabsorbent polymers were evaluated. Under optimal conditions, the HPMC-g-PAA exhibited a maximum absorption capacity of 1567 g/g in distilled water and 88.5 g/g in NaCl solution (0.9 wt %). Similarly, the HPMC-g-PAA/urea demonstrated a maximum absorption capacity of 1382 g/g in distilled water and 82.3 g/g in NaCl solution (0.9 wt %). The comprehensive investigation encompassed the assessment of slow-release and water-retention properties, as well as a growth experiment conducted on the samples. The slow-release period of sample reached 93% at the 26th hour. The obtained results unequivocally validate the effectiveness of the synthesized superabsorbent resin and slow-release fertilizer in significantly enhancing plant growth.

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Ultraviolet photopolymerization and performances of fast‐water absorbing sodium polyacrylate

Cited by 9 publications

References 19 publications

Preparation, properties, self crosslinking mechanism, and characterization of UV initiated polyacrylic acid superabsorbent resins

Preparation, properties, self crosslinking mechanism, and characterization of UV initiated polyacrylic acid superabsorbent resins

Fabrication of a fast‐swelling superabsorbent resin by inverse suspension polymerization

Preparation of Hypromellose-Graft-Polyacrylic Acid Superabsorbent Resin by Ultraviolet Polymerization and Its Slow-Release Performance

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