Effective parameters in surface cross-linking of acrylic-based water absorbent polymer particles using bisphenol A diethylene glycidyl ether and cycloaliphatic diepoxide

Moini, Nasrin; Kabiri, Kourosh

doi:10.1007/s13726-015-0386-4

Cited by 34 publications

(26 citation statements)

References 34 publications

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“…Naturally, by increasing the amount of surface cross‐linker, the total cross‐linking density of hydrogel particle increased; therefore, it was expected that the final water uptake of SAPs decreased. This behavior has also been reported in other articles concerning the surface cross‐linking of hydrogels . According to Table , by increasing the amount of surface cross‐linker, up to 1 g, the total water and saline absorbency decreased about 96% and 67%, respectively.…”

Section: Resultssupporting

confidence: 85%

“…This behavior has also been reported in other articles concerning the surface crosslinking of hydrogels. 8,12,47,48 According to Table 2, by increasing the amount of surface cross-linker, up to 1 g, the total water and saline absorbency decreased about 96% and 67%, respectively. On the other hand, the surface cross-linking was used as one of the technics that can improve the SAP strength.…”

Section: Surface Cross-linked Sapsmentioning

confidence: 99%

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Synthesis of bio‐based internal and external cross‐linkers based on tannic acid for preparation of antibacterial superabsorbents

Dabbaghi

Kabiri

Ramazani

et al. 2019

Polymers for Advanced Techs

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Recent researches focus on the synthesis of new cross‐linkers from natural resources. In the current work, functionalized tannic acid was employed as a replacement of petroleum‐based cross‐linkers because of its outstanding biochemical properties. Alkene‐ and epoxy‐functionalized tannic acids were synthesized as internal and external cross‐linkers, respectively. Cross‐linker structures were characterized with Ft‐IR and 1HNMR analysis. Different amounts, as well as different numbers of alkene functional group, were incorporated during the superabsorbent synthesis. Moreover, the internal cross‐linked superabsorbent was surface cross‐linked with different amounts of epoxy‐functionalized tannic acid and increased the absorbency under load about 10 g g−1. Free absorption properties in water and saline solution, absorbency under load, and rheological properties of superabsorbents were investigated. In addition, the antibacterial activity of the internal and external cross‐linked superabsorbent was studied against Escherichia coli and Staphylococcus aureus bacteria via different methods and compared with that of conventional superabsorbent.

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Section: Resultssupporting

confidence: 85%

Section: Surface Cross-linked Sapsmentioning

confidence: 99%

Synthesis of bio‐based internal and external cross‐linkers based on tannic acid for preparation of antibacterial superabsorbents

Dabbaghi

Kabiri

Ramazani

et al. 2019

Polymers for Advanced Techs

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“…The superabsorbent polymer (SAP) has a three-dimensional network structure containing hydrophilic functional groups and ionized ions on its surface (Moini and Kabiri, 2015). It can retain as much as 100 to 1000 times its own weight in water by an osmotic potential gradient between the inside and outside of the membrane.…”

Section: Researchmentioning

confidence: 99%

Co-application of soil superabsorbent polymer and foliar fulvic acid to increase tolerance to water deficit maize: photosynthesis, water parameters, and proline

Yang

Guo

et al. 2019

Chil. j. agric. res.

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Fulvic acid (FA) and superabsorbent polymer (SAP) are widely applied to improve crop growth and yield under water deficit conditions, but little is known about the changes in crop physiological parameters related to water deficit tolerance when SAP and FA are combined. A pot test with maize (Zea mays L.) plants was conducted to examine the combined effect on photosynthesis, leaf water, proline, and growth under soil water deficit. Maize plants were subjected to two soil moisture conditions at the late crop growth phase: water deficit (WD, 50% field capacity) and well-watered (WW, 80% field capacity). The SAP (4.5 g m-2) was mixed into the soil layer at sowing and the FA solution (2 g L-1) was sprayed twice during water control. The combined application significantly improved maize grain yield under both watering conditions. The net photosynthesis rate, intrinsic quantum yield, fluorescent parameter (Fv/Fm), and chlorophyll content all improved with the combined application under both watering regimes. The compensating effect of combining chemicals on yield and photosynthesis parameters was higher than when applied alone under the two watering conditions. For prolonged and WD conditions, leaf proline and water content were higher under the combined treatment than when used separately. Under the WD conditions treated with FA and SAP, Fv/Fm had positive significant correlations with leaf water content and osmotic potential; leaf proline did not show any correlations with either the osmotic potential or leaf water content. This result demonstrated that SAP and FA could be combined to maintain high leaf proline and improve photosynthesis to mitigate adverse effects of moderate water storage on maize growth.

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“…Accordingly, the present work is the first original report on organic–inorganic surface treatment of SAP particles by 3‐[(2, 3‐epoxy propoxy)‐propyl]‐trimethoxysilane (EPS). This report is based on newly conducted researches on surface cross‐linking and its interfering parameters …”

Section: Introductionmentioning

confidence: 99%

Fine tuning of SAP properties via epoxy-silane surface modification

Moini

Kabiri

Zohuriaan‐Mehr

et al. 2017

Polym. Adv. Technol.

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Using 3-[(2,3-epoxypropoxy)-propyl]-trimethoxysilane as a surface modifier, superabsorbent polymers with improved gel strength in their swollen state and saline absorbency under load are synthesized. The products are characterized using attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), rheometry, scanning electron microscopy-energy dispersive X-ray analysis, contact angle, thermogravimetric analysis, water absorbency and gel content. The temperature and the duration effect of the surface-treatment process on residual monomer content are also investigated by high performance liquid chromatography. The gel strength (as shown by storage modulus) and absorbency under load are improved up to 3500-4000 Pa, and 30-40 g/g, respectively. It is suggested that the surface of the superabsorbent polymer particles has been modified by two mechanisms: i.e. interpenetrating polymer network and cross-linking. Moreover, the surface modification has enhanced thermo-stability and prohibited undesirable gel blockage. Depending on the post-treatment method used, the wetting behavior of particles is also altered. Water absorption capacityFree swelling capacity values were measured using the sieve method. [2] The powdered samples (0.10 g) were permitted to Scheme 1. A snapshot of the present research.

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Effective parameters in surface cross-linking of acrylic-based water absorbent polymer particles using bisphenol A diethylene glycidyl ether and cycloaliphatic diepoxide

Abstract: parameters have been derived and compared with diethylene glycol diglycidyl ether-treated sample, as well.

Cited by 34 publications

References 34 publications

Synthesis of bio‐based internal and external cross‐linkers based on tannic acid for preparation of antibacterial superabsorbents

Synthesis of bio‐based internal and external cross‐linkers based on tannic acid for preparation of antibacterial superabsorbents

Co-application of soil superabsorbent polymer and foliar fulvic acid to increase tolerance to water deficit maize: photosynthesis, water parameters, and proline

Fine tuning of SAP properties via epoxy-silane surface modification

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