Practical Improvement of SAP Hydrogel Properties via Facile Tunable Cross-linking of the Particles Surface

Moini, Nasrin; Kabiri, Kourosh; Zohuriaan‐Mehr, M. J.

doi:10.1080/03602559.2015.1070873

Cited by 34 publications

(22 citation statements)

References 32 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%

“…Also, v 2 is the volume fraction of the polymer in which shear modulus has been measured and was calculated from Equation

v_{2} = \frac{W_{normald}}{ρ_{normald}} / ((), \frac{W_{normald}}{ρ_{normald}} + \frac{W_{normals}}{ρ_{normals}}),

where W s and W d are solvent and dry SAP weight, respectively, and ρ s and ρ v are the density of solvent and dry SAP, respectively, while

v_{2}^{0}

is the volume fraction of the polymer during the formation and was calculated from Equation

v_{2}^{0} = c_{0} v_{r},

where c 0 is the initial molar concentration of the monomer (mol L −1 ) and v r is the molar volume of the polymer repeating unit ( v r = 47.5 × 10 −3 L mol −1 ).…”

Section: Resultsmentioning

confidence: 99%

“…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%

See 2 more Smart Citations

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%

“…Also, v 2 is the volume fraction of the polymer in which shear modulus has been measured and was calculated from Equation

v_{2} = \frac{W_{normald}}{ρ_{normald}} / ((), \frac{W_{normald}}{ρ_{normald}} + \frac{W_{normals}}{ρ_{normals}}),

where W s and W d are solvent and dry SAP weight, respectively, and ρ s and ρ v are the density of solvent and dry SAP, respectively, while

v_{2}^{0}

is the volume fraction of the polymer during the formation and was calculated from Equation

v_{2}^{0} = c_{0} v_{r},

where c 0 is the initial molar concentration of the monomer (mol L −1 ) and v r is the molar volume of the polymer repeating unit ( v r = 47.5 × 10 −3 L mol −1 ).…”

Section: Resultsmentioning

confidence: 99%

Section: Surface Cross-linked Sapsmentioning

confidence: 99%

See 1 more Smart Citation

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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“…Various strategies have been employed to enhance the gel strength, including composite and nanocomposite hydrogels, interpenetrating polymer network (IPN) and surface treatment . Among those strategies, surface treatment is more fascinating since it can feasibly introduce desired properties into the particles, like enhanced gel strength, hydrophobicity, and antibacterial properties . Among the SAP properties, saline‐absorbency under load (AUL) is a method to evaluate both the gel strength and swelling characteristics.…”

Section: Introductionmentioning

confidence: 99%

Glycerol‐lactic acid star‐shaped oligomers as efficient biobased surface modifiers for improving superabsorbent polymer hydrogels

Ghasri

Jahandideh

Kabiri

et al. 2018

Polymers for Advanced Techs

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The glycerol-lactic acid-based star-shaped modifier (SM) were synthesized and employed for surface modification of hygienic superabsorbent polymer (SAP) hydrogels for the first time. Surface crosslinking was carried out to increase the saline-absorbency under load (AUL) and the swollen gel strength. The surface treatment process was analyzed employing free absorbency and AUL tests, salt sensitivity, attenuated total reflectance-Fourier-transform infrared spectroscopy (ATR-FTIR), oscillatory rheometry, as well as scanning electron microscopy analysis. The effect of the branched architecture and the contents of SM on the properties of the modified SAPs were studied. The implementation of surface treatment leads to increase up to a 28% in the AUL of the modified SAP. Moreover, the loss modulus was surprisingly increased, while the storage modulus was enhanced (possibly due to the star architecture of oligomers). M c and crosslink density values have been estimated based on modified rubber elasticity theory. Salt sensitivity factor ( f ) was calculated; the modified samples showed lower salt sensitivity in NaCl ( f = 0.7) and CaCl 2 ( f = 0.93-0.95) compared with the intact SAP ( f = 0.84 for NaCl, and f = 0.95-0.97 for CaCl 2 ).

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“…HSA merupakan salah satu bahan yang penting untuk aplikasi di bidang kesehatan, beberapa contoh alat kesehatan berbasis HSA kualitas impor antara lain wadah bedah (surgical pad), pengemas panas dan dingin (hot and cold theraphy packs), pengendap limbah rumah sakit (medical waste solidification), kertas saniter (sanitary napkins), khususnya popok bayi dengan volume kebutuhan yang meningkat seiring dengan meningkatnya jumlah bayi yang lahir setiap tahun [1][2][3][4][5][6]. Lebih jauh lagi, jangkauan aplikasi HSA tidak hanya untuk keperluan tersebut diatas tetapi juga dapat digunakan sebagai kantong air untuk daerah kering/pertanian, media pertumbuhan jamur, sebagai adsorben limbah zat warna dan ion-ion logam, salju buatan, adsorpsi jamur dan bacteria pada pembalut luka, untuk imobilisasi obat (controlled release of drug) dan urea [7][8][9][10][11][12].…”

Section: Pendahuluanunclassified

Sintesis Dan Karakterisasi Biodegradable Hidrogel Superabsorben Poli(kalium Akrilat)-G-Glukomanan Dengan Teknik Iradiasi Gamma

Erizal

Sulistioso²,

Juniarti³

et al. 2017

jsmi

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SINTESIS DAN KARAKTERISASI BIODEGRADABEL HIDROGEL SUPERABSORBEN POLI(KALIUM AKRILAT)-g-GLUKOMANAN DENGAN TEKNIK IRADIASI GAMMA. Telah dilakukan sintesis satu seri hidrogel superabsorben dari campuran asam akrilat yang dinetralkan sebagian (Dn = 0,5) dengan KOH pada beragam konsentrasi glukomanan (0,25 % hingga 1 %) selanjutnya diiradiasi pada dosis 10 kGy (laju dosis 2,5 kGy/jam) pada suhu kamar. Pengaruh konsentrasi glukomanan terhadap kemampuan menyerap air dan fraksi gel hidrogel dipelajari. Perubahan struktur kimia hidrogel diukur menggunakan Fourier Transform Infra Red (FT-IR) dan morfologi permukaan hidrogel diinvestigasi menggunakan Scanning Electron Microscope (SEM). Hasil evaluasi menunjukkan bahwa pada kondisi optimum (0,5 % glukomanan), rasio swelling hidrogel mencapai nilai 800 g/g dan fraksi gel 94,45 %. Hasil analisis FT-IR mengkonfirmasi terjadinya pergeseran gugus fungsi rangkap dari C=C asam akrilat, pengujian SEM menunjukkan permukaaan hidrogel berpori pori besar yang tidak teratur.

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Practical Improvement of SAP Hydrogel Properties via Facile Tunable Cross-linking of the Particles Surface

Cited by 34 publications

References 32 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

Glycerol‐lactic acid star‐shaped oligomers as efficient biobased surface modifiers for improving superabsorbent polymer hydrogels

Sintesis Dan Karakterisasi Biodegradable Hidrogel Superabsorben Poli(kalium Akrilat)-G-Glukomanan Dengan Teknik Iradiasi Gamma

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