Preparation and performance of poly(acrylic acid–methacrylic acid)/montmorillonite microporous superabsorbent nanocomposite

Mu, Yuanchun; Du, Dayan; Yang, Renshu; Xu, Zhiwei

doi:10.1016/j.matlet.2014.11.144

Cited by 19 publications

(10 citation statements)

References 13 publications

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“…Superabsorbent polymers (SAPs) are one type of three-dimensional (3D), cross-linked hydrophilic materials that can absorb and hold a large amount of water within a certain period of time [1][2][3][4]. Before the emergence of SAP, natural biomass materials, such as cotton, have been used for traditional absorbents [5].…”

Section: Introductionmentioning

confidence: 99%

Kaolin-Enhanced Superabsorbent Composites: Synthesis, Characterization and Swelling Behaviors

Chen

Zhang

et al. 2021

Polymers

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One type of low-cost and eco-friendly organic‒inorganic superabsorbent composite (SAPC) was synthesized by free radical polymerization of acrylic acid (AA), starch (ST), sodium alginate (SA) and kaolin (KL) in aqueous solution. The structure and morphology of the SAPC were characterized by Fourier transform infrared spectrometer (FT-IR), scanning electron microscope (SEM), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The influence of different reaction conditions on water absorption of SAPC, i.e., SA and KL contents, AA neutralization degree (ND), potassium persulfate (KPS) and N, N′-methylenebisacrylamide (MBA) loading were systematically studied. Under the optimal synthesis conditions, very high water absorption of 1200 g/g was achieved. The swelling kinetic mechanism of SAPC was studied by pseudo-second order swelling kinetics model and Ritger‒Peppas model. The performances of SAPC under different environments were tested and results revealed that this new SAPC had excellent swelling capacity, high water retention, good salt tolerance in monovalent salt solution (NaCl solution) and good pH tolerance between 4 and 10.

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Section: Introductionmentioning

confidence: 99%

Kaolin-Enhanced Superabsorbent Composites: Synthesis, Characterization and Swelling Behaviors

Chen

Zhang

et al. 2021

Polymers

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“…Compared with previous reports, [ 46 , 47 ], WB-g-PAA/LA (5 wt%) exhibited a similar water-retention capability, which indicates it can be further used as an effective water-retention agent for herbal medicine growth in arid soils. In addition, the water-retention rate equation followed a zero-order reaction based on the rate equation and the water-retention curve, [ 48 ] demonstrating that WR (%) and t had a linear relationship. The WR (%) could be calculated by the following equation:

100

where WR (%) represents the percentage of water retention and k n represents the rate constant of water retention.…”

Section: Resultsmentioning

confidence: 99%

Preparation of a low-cost and eco-friendly superabsorbent composite based on wheat bran and laterite for potential application in Chinese herbal medicine growth

et al. 2018

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A low-cost and eco-friendly superabsorbent composite is prepared through the free-radical graft co-polymerization of wheat bran (WB), acrylic acid (AA) and laterite (LA) in an aqueous solution. Elemental map, scanning electron microscopy and Fourier transform infrared spectra revealed that the LA evenly distributed in the superabsorbent composite and wheat bran-g-poly(acrylic acid)/laterite (WB-g-PAA/LA) formed successfully. Thermogravimetric analysis confirmed that the WB-g-PAA/LA had high thermal stability. Furthermore, the properties of the WB-g-PAA/LA, such as swelling in saline solutions and degradation, are also assessed. The final WB-g-PAA/LA (5 wt%) superabsorbent composite attained an optimum water absorbency of 1425 g g−1 in distilled water and 72 g g−1 in 0.9 wt% NaCl solution. The water absorbency of WB-g-PAA/LA (10 wt%) is even greater than that of the WB-g-PAA. Moreover, the water-retention capacity of WB-g-PAA/LA (5 wt%) is high, and the water-retention process followed a zero-order reaction. The reaction rate constant is 8.2428 × 105 exp(−Ea/RT) and the apparent activation energy (Ea) is 35.11 kJ mol−1. Furthermore, WB-g-PAA/LA (5 wt%) may regulate the release of urea, indicating that the superabsorbent composite could provide a promising application as a urea fertilizer carrier. Additionally, it increased the germination and growth rates of Glycyrrhiza uralensis Fisch, suggesting it could influence the growth of Chinese herbal medicine.

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“…There are large areas of arid, semi‐arid, and desert regions in the world, so water shortage is one of the main factors limiting agricultural development. Superabsorbent polymers (SAPs) are hydrophilic materials that can absorb a large amount of water in swollen state in a short time and retain water under pressure . The use of SAPs in arid areas is one of the most important means to improve the quality of plants .…”

Section: Introductionmentioning

confidence: 99%

Frontal polymerization of superabsorbent polymers based on vermiculite with slow release of urea

Yuan

Qiu

et al. 2016

Polymer Engineering & Sci

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Poly(acrylic acid-co-acrylamide)/sodium carboxymethyl cellulose/vermiculite (VMT) superabsorbent polymers (SAPs) were prepared by frontal polymerization (FP), a kind of polymerization model characterized by short reaction times and low-energy consumption. The effects of VMT content and monomer ratios on frontal parameters and water absorbency were investigated. Due to the good heat insulation property of VMT, the propagating front still sustained at high VMT concentrations (over 30%). The preparation of SAPs with high VMT-loading via FP has advantages of low energy consumption and low materials prices, decreasing the cost of SAPs effectively. SAPs with slow-release fertilizer (SSRF) were obtained by embedding urea into their networks during the FP process. The addition of urea not only endows SAPs with slow release function of urea (more than 30 days in soil), but also increases their water absorbency (by 17.4%). The effects of obtained SSRF on tall fescue seeds germination and growth were studied. Compared with the control group, the germination rate and vigor index of tall fescue seeds applied SSRF with 10% urea increased by 17.5 and 80.2%, respectively. POLYM. ENG. SCI., 57:69-77, 2017.

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Preparation and performance of poly(acrylic acid–methacrylic acid)/montmorillonite microporous superabsorbent nanocomposite

Cited by 19 publications

References 13 publications

Kaolin-Enhanced Superabsorbent Composites: Synthesis, Characterization and Swelling Behaviors

Kaolin-Enhanced Superabsorbent Composites: Synthesis, Characterization and Swelling Behaviors

Preparation of a low-cost and eco-friendly superabsorbent composite based on wheat bran and laterite for potential application in Chinese herbal medicine growth

Frontal polymerization of superabsorbent polymers based on vermiculite with slow release of urea

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