Preparation and swelling properties of hydrolysis-resistant superabsorbent composite based on acrylic acid and sodium bentonite

Wang, Xiangpeng; Zheng, Yong; Zhang, Chunxiao; Zong, Lina

doi:10.1080/1023666x.2020.1783939

Cited by 9 publications

(1 citation statement)

References 21 publications

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“…The most popular products of SAP include baby diapers and other hygiene products, such as adult diapers, sanitary napkins, and absorbent pads used in hospitals [6,7]. There are numerous recent research studies on sodium polyacrylate SAPs [8,9]. SAPs must have high water absorption capacity and strong salt resistance, and fast water absorption rates in some applications.…”

Section: Introductionmentioning

confidence: 99%

Structural Modifications of Sodium Polyacrylate-Polyacrylamide to Enhance Its Water Absorption Rate

Zhu

Sun

2022

Coatings

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Superabsorbent polymers (SAPs) can absorb a large amount of water and find broad applications in various industries. There are many reports on the synthesis and structural modification techniques to improve the water absorption property of SAPs. However, we see few studies on the comparison and integration of these techniques. In this study, three structurally modified SAPs were synthesized and are evaluated for the effects of surface cross-linking, foaming, and the integration of the two modifications to improve the absorption rate and capacity of a conventional SAP. First, sodium polyacrylate-polyacrylamide was prepared as the base polymer by the aqueous solution polymerization method. Second, the base polymer was modified with surface cross-linking to enhance absorption, and a surface cross-linked SAP was obtained. Third, the base polymer was modified with foaming to obtain a foamed SAP. Lastly, the foamed SAP was modified further with surface cross-linking to obtain a foamed and surface cross-linked SAP. In comparison with the base polymer, the three synthesized SAPs were evaluated for their absorption performance. Results show that their absorption performance could be improved by the three modification processes. Specifically, the surface cross-linked SAP had the best absorption capacity under load, the foamed SAP had the highest absorption capacity of 1954 g/g, and the foamed plus surface cross-linked SAP had the fastest absorption rate with an initial swelling rate of Kis = 21.94.

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Section: Introductionmentioning

confidence: 99%

Structural Modifications of Sodium Polyacrylate-Polyacrylamide to Enhance Its Water Absorption Rate

Zhu

Sun

2022

Coatings

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Comparison of Structural, Water‐Retaining and Sorption Properties of Acrylamide‐Based Hydrogels Cross‐Linked by Physical and Chemical Methods

Siryk,

Goncharuk,

Samchenko

et al. 2024

ChemPhysChem

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Two series of hydrogels based on acrylamide and its copolymers with acrylonitrile and acrylic acid were synthesized by two cross‐linking methods – chemical (using N,N′‐methylene bis‐acrylamide) and physical (using montmorillonite (MMT)) ones. The structure of the gels was characterized by Fourier Transform Infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The swelling and sorption properties were analyzed as a function of both the monomer composition and the cross‐linking method. The shift of the band corresponding to Si−O (995–1030 cm−1) confirmed the formation of intercalation structures for MMT‐cross‐linked gels. Moreover, physically cross‐linked gels demonstrated a non‐monotonic dependence of the swelling degree on the MMT concentration, and acrylamide‐acrylic acid copolymer MMT‐cross‐linked gels showed pH sensitivity and the highest swelling degree of 150 g/g. The highest sorption capacity towards cadmium(II) ions was demonstrated by acrylamide‐acrylic acid copolymer gels, both covalently cross‐linked (30 mg/g) and MMT‐cross‐linked (8.9 mg/g).

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Semi-coke-enhanced eco-friendly superabsorbent composites for agricultural application

et al. 2022

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Preparation and swelling properties of hydrolysis-resistant superabsorbent composite based on acrylic acid and sodium bentonite

Cited by 9 publications

References 21 publications

Structural Modifications of Sodium Polyacrylate-Polyacrylamide to Enhance Its Water Absorption Rate

Structural Modifications of Sodium Polyacrylate-Polyacrylamide to Enhance Its Water Absorption Rate

Comparison of Structural, Water‐Retaining and Sorption Properties of Acrylamide‐Based Hydrogels Cross‐Linked by Physical and Chemical Methods

Semi-coke-enhanced eco-friendly superabsorbent composites for agricultural application

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