Swelling kinetics and characterization of novel superabsorbent polymer composite based on mung bean starch-filled poly(acrylic acid)-graft-waste polystyrene

Deraman, Nurul Fasiha; Mohamed, Nur Raihan; Romli, Ahmad Zafir

doi:10.1007/s12588-019-09232-9

Cited by 4 publications

(4 citation statements)

References 13 publications

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“…less than two hours of testing; this phenomenon was previously reported by other authors [28][29][30][31][32][33]. Furthermore, hydrogels show swellings that gradually decrease depending on the solution and show a kinetic curve with a function close to the WC, WSM, and WSN curves when exposed to CaCl2 (See Figure 2).…”

Section: Swelling Test In Calcium-associated Solutionssupporting

confidence: 82%

“…It should be noted that hydrogels show susceptibility depending on the type of solution, showing better swelling with potassium and sodium solutions, and lower performance with magnesium and calcium solutions. Lower swelling performances with magnesium and calcium solutions are visible, and it is observed that all of the curves reach equilibrium swelling except for the solutions prepared based on CaCl 2 , which present a swelling peak and later drop significantly after less than two hours of testing; this phenomenon was previously reported by other authors [28][29][30][31][32][33]. Furthermore, hydrogels show swellings that gradually decrease depending on the solution and show a kinetic curve with a function close to the WC, WSM, and WSN curves when exposed to CaCl 2 (See Figure 2).…”

Section: Swelling Test In Saline Solutionssupporting

confidence: 81%

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Degradation of Hydrogels Based on Potassium and Sodium Polyacrylate by Ionic Interaction and Its Influence on Water

et al. 2022

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Hydrogels are a very useful type of polymeric material in several economic sectors, acquiring great importance due to their potential applications; however, this type of material, similarly to all polymers, is susceptible to degradation, which must be studied to improve its use. In this sense, the present work shows the degradation phenomena of commercial hydrogels based on potassium and sodium polyacrylate caused by the intrinsic content of different types of potable waters and aqueous solutions. In this way, a methodology for the analysis of this type of phenomenon is presented, facilitating the understanding of this type of degradation phenomenon. In this context, the hydrogels were characterized through swelling and FTIR to verify their performance and their structural changes. Likewise, the waters and wastewaters used for the swelling process were characterized by turbidity, pH, hardness, metals, total dissolved solids, electrical conductivity, DLS, Z-potential, and UV-vis to determine the changes generated in the types of waters caused by polymeric degradation and which are the most relevant variables in the degradation of the studied materials. The results obtained suggest a polymeric degradation reducing the swelling capacity and the useful life of the hydrogel; in addition, significant physicochemical changes such as the emergence of polymeric nanoparticles are observed in some types of analyzed waters.

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Section: Swelling Test In Calcium-associated Solutionssupporting

confidence: 82%

Section: Swelling Test In Saline Solutionssupporting

confidence: 81%

Degradation of Hydrogels Based on Potassium and Sodium Polyacrylate by Ionic Interaction and Its Influence on Water

et al. 2022

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“…There has been a lot of research on the chemical modification and cross-linking of cellulose. However, starch modification was also tested with various synthetic monomers, e.g., acrylic acid [ 9 , 10 , 11 , 12 , 13 , 14 , 15 ], acrylamide [ 16 , 17 , 18 ], methacrylamide [ 19 , 20 ], acrylonitrile [ 21 ], vinyl alcohol [ 22 ], 2-acrylamido-2-methylpropanesulfonic acid [ 23 , 24 ], styrene [ 25 ], vinylimidazole [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization Superabsorbent Polymers Made of Starch, Acrylic Acid, Acrylamide, Poly(Vinyl Alcohol), 2-Hydroxyethyl Methacrylate, 2-Acrylamido-2-methylpropane Sulfonic Acid

Czarnecka

Nowaczyk

2021

IJMS

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Three polymers with excellent absorption properties were synthesized by graft polymerization: soluble starch-g-poly(acrylic acid-co-2-hydroxyethyl methacrylate), poly(vinyl alcohol)/potato starch-g-poly(acrylic acid-co-acrylamide), poly(vinyl alcohol)/potato starch-g-poly(acrylic acid-co-acrylamide-co-2-acrylamido-2-methylpropane sulfonic acid). Ammonium persulfate and potassium persulfate were used as initiators, while N,N′-methylenebisacrylamide was used as the crosslinking agent. The molecular structure of potato and soluble starch grafted by synthetic polymers was characterized by means of Fourier Transform Infrared Spectroscopy (FTIR). The morphology of the resulting materials was studied using a scanning electron microscope (SEM). Thermal stability was tested by thermogravimetric measurements. The absorption properties of the obtained biopolymers were tested in deionized water, sodium chroma solutions of various concentrations and in buffer solutions of various pH.

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“…There are significant reductions in the intensity of peak at 2922 in purified SAH and NaOH treated SAH as compared to unpurified SAH which might be due to removal of unused acrylic acid in the purification process. FTIR spectra of starch gives strong absorption band at 3200-3300 cm -1 ,a characteristic of-OH bond also other bands obtained (2930: C-H stretching, 1650: carbonyl group, 1152 and 1018:-CO stretching) resembles the standard bands of starch [34,35]. Polydispersity index (PDI) is used to measure heterogeneity in particle size means it gives width of particle size distribution.…”

Section: Ftir Pxrd and Sem Analysis Of Hydrogelmentioning

confidence: 99%

Formulation and Evaluation of Superabsorbent Hydrogel From Natural Polymer

2023

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Objective: The objective of the present study was to synthesize the hydrogel from natural polymer and evaluation of its physical and chemical properties. Methods: Hydrogel was synthesized using graft co-polymerization technique from wheat starch, by crosslinking with acrylic acid. The product was purified, dried and micronized. It was then evaluated for water absorption and retention property at varying pH, FTIR, PXRD and Thermal analysis, microscopic, micromeritic and stability studies etc. Furthermore, the effect of NaOH treatment on prepared hydrogel material was studied. Results: Result of the studies revealed that superabsorbent hydrogel (SAH) product shows good water absorption capacity of 120g/g at neutral pH. Maximum water absorption capacity was at pH 9 which is 146.28g/g. Product shows good thermal stability, less cohesiveness and is amorphous in nature. In hygroscopicity study weight gain by SAH was 6.65% only while for unpurified SAH and NaOH treated SAH, it was 10.5% and 23.42% respectively. NaOH treatment shows a decrease in water absorption capacity by more than 40% also there is change in surface morphology of the product. Additionally, hygroscopicity was more and degradation rate was faster for NaOH treated hydrogel. Conclusion: Crosslinking with acrylic acid can form superabsorbent hydrogel material from the natural polymer such as wheat starch. The product shows excellent water absorption and retention capacity. pH affects water absorption capacity and shows maximum at pH 9 and at lower and higher pH it decreases to a significant level. There was decline in water absorption capacity and increase in hygroscopicity, when NaOH treatment is given to the SAH powder.

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Swelling kinetics and characterization of novel superabsorbent polymer composite based on mung bean starch-filled poly(acrylic acid)-graft-waste polystyrene

Cited by 4 publications

References 13 publications

Degradation of Hydrogels Based on Potassium and Sodium Polyacrylate by Ionic Interaction and Its Influence on Water

Degradation of Hydrogels Based on Potassium and Sodium Polyacrylate by Ionic Interaction and Its Influence on Water

Synthesis and Characterization Superabsorbent Polymers Made of Starch, Acrylic Acid, Acrylamide, Poly(Vinyl Alcohol), 2-Hydroxyethyl Methacrylate, 2-Acrylamido-2-methylpropane Sulfonic Acid

Formulation and Evaluation of Superabsorbent Hydrogel From Natural Polymer

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