Synthesis and super-swelling behavior of a novel protein-based superabsorbent hydrogel

Pourjavadi, Ali; Kurdtabar, Mehran; Mahdavinia, Gholam Reza; Hosseinzadeh, Hossein

doi:10.1007/s00289-006-0649-5

Cited by 94 publications

(103 citation statements)

References 25 publications

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“…So that there have already several studies focusing on improving some hydrogel properties, and further more some modification method seemed effective. [11][12][13][14] On the basis of our former researches, 9,15 we have been interested in preparing a hydrogel which possess relatively high water absorbency under certain load and at atmosphere pressure in salt solution.…”

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confidence: 99%

Salt- and pH-Resisting Collagen-based Highly Porous Hydrogel

Pourjavadi

Kurdtabar

Ghasemzadeh

2007

Polym J

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A novel approach was developed to prepare a highly porous hydrogel with superior salt-and pH-resisting properties. According to this method, synthetic comonomers, i.e. acrylic acid (AA) and 2-acrylamido-2-methylpropanesulfonic acid (AMPS), were polymerized and crosslinked in the presence of hydrolyzed collagen as a natural backbone. The characterizations of hydrogels were investigated by swelling experiment, Fourier transform infrared (FT-IR) spectroscopy, acid-base titration and thermogravimetric analysis (TGA). Morphology of the samples was examined by scanning electron microscopy (SEM). Experimental results indicate that the hydrogel has an absorbency of 360 and 73-82 g/g for distilled water and saline solutions, respectively. Water absorbency slightly changes from pH 3 to 8 and interestingly is more than of that in distilled water ($ 500 g/g). The hydrogel thus prepared was showing a better salt-and pH-resistance compared to collagen-g-PAA hydrogel due to the introduction of the AMPS segment and therefore is a suitable candidate for horticulture and tissue engineering applications.KEY WORDS: Hydrolyzed Collagen / Hydrogel / Porous / Salt-resisting / pH-Resisting / Hydrogels are an important class of materials have been attracting in many industrial applications because of their response to changing environment conditions such as temperature, 1 pH 2 and solvent composition. 3 Although their attraction in medical and mechanical engineering fields, the technological success of these applications is today limited by their low efficiency and slow rate of response to external stimuli. These are related to the degree of porosity which plays the multiple role of enhancing the total water sorption capability and the rate of response by reducing the transport resistance.4,5 Therefore, creation of porosity in hydrogels has been considered as an important process in many ways.6-8 According to our prior works, 9,10 neutralization of the grafted polymer after gel formation or gas releasing during hydrolyzation create a hydrogel with porous structure.It is desired to develop hydrogels having enhanced absorbency in saline solutions, in various values of pH and good strength of the swollen gel (high absorbency under load), since the requirements of such applications as long-term water holding in horticulture and hygienic products, and the like. So that there have already several studies focusing on improving some hydrogel properties, and further more some modification method seemed effective.11-14 On the basis of our former researches, 9,15 we have been interested in preparing a hydrogel which possess relatively high water absorbency under certain load and at atmosphere pressure in salt solution.Natural-based hydrogels have attracted in medical and pharmaceutical interests since their non-toxicity, biocompatibility and biodegradability. This paper describes the preparation and characterization of a partially neutralized collagen-gpoly(AA-co-AMPS) porous hydrogel, as a new natural-based polymer, which shows salt-and pH-resist...

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confidence: 99%

Salt- and pH-Resisting Collagen-based Highly Porous Hydrogel

Pourjavadi

Kurdtabar

Ghasemzadeh

2007

Polym J

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“…Increased APS concentration resulted in more radical sites on the alginate backbone that inturn led to higher Gr and add-on values and lower homopolymers formation. As a result, increased free radicals on alginate are compensated by partial termination of the macroradicals 11 . Thus Gr and addon values were diminished at higher amounts of the initiator.…”

Section: Effect Of Initiator Concentrationmentioning

confidence: 99%

“…However, upon further increase in the substrate concentration, increase in the reaction medium viscosity restricts the movements of macroradicals leading to decreased grafting ratio and add-on values. It also may be attributed to deactivation of the macroradical growing chains (e.g., by transfer reactions, combination and/ or interaction with the primary radicals) soon after their formation [9][10][11][12][13][14][15][16][17][18][19] .…”

Section: Effect Of Alginate Concentrationmentioning

confidence: 99%

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Grafting Copolymerization of Hydrophilic Monomers Onto Alginate for Modification it's Structure

Sadeghi

Mohammadinasab²,

Shafiei³

et al. 2014

Orient. J. Chem

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In this research, we synthesize of a graft copolymer based on alginate via simultaneously graft copolymerization acrylamide (AAm) and 2-acrylamido-2-methylpropanesulfonic acid (AMPS) onto alginate backbones. The polymerization reaction was carried out in an aqueous medium and in the presence of ammonium persulfate (APS) as an initiator. Infrared spectroscopy and TGA thermal analysis were carried out to confirm the chemical structure of the copolymer. A proposed mechanism for hydrogel formation was suggested.

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“…With the increasing importance of resource and environment issues, new types of natural superabsorbents have attracted considerable attention owing to their renewability, nontoxicity, biocompatibility and biodegradability [11,12]; the organic-inorganic superabsorbent composites, derived from natural polysaccharide and inorganic clay minerals, are representative families of natural superabsorbents [13]. Many natural superabsorbent composites based on starch [14,15], cellulose [16], chitosan [17,18], gelatin [19], dextrin [20] and alginate [21] have been developed, and the resultant materials exhibited satisfactory properties and environmentally friendly characteristics.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and swelling properties of guar gum-g-poly(sodium acrylate-co-styrene)/muscovite superabsorbent composites

Wang

Kang

Wang

2010

Science and Technology of Advanced Materials

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A series of novel guar gum-g-poly(sodium acrylate-co-styrene)/muscovite (GG-g-P(NaA-co-St)/MVT) superabsorbent composites were prepared by free-radical grafting copolymerization of natural guar gum (GG), partially neutralized acrylic acid (NaA), styrene (St) and muscovite (MVT) using ammonium persulfate (APS) as the initiator and N,N-methylene-bis-acrylamide (MBA) as the crosslinker. Optical absorption spectra confirmed that NaA and St had been grafted onto the GG main chain and MVT participated in the polymerization reaction. The simultaneous introduction of St and MVT into the GG-g-PNaA matrix could clearly improve the surface morphologies of the composites, and MVT led to better dispersion in the polymeric matrix without agglomeration, as revealed by electron microscopy. The effects of St and MVT on the water absorption and swelling behavior in various saline solutions, aqueous solutions of hydrophilic organic solvents and surfactant solutions were investigated. Results indicated that the swelling rate and capabilities of the composites were markedly enhanced by the incorporation of the hydrophobic monomer St and inorganic MVT clay mineral. The superabsorbent composite showed a clearer deswelling characteristic in solutions of multivalent saline, acetone and ethanol, and cationic surfactant than that in the solutions of multivalent saline, methanol and anionic surfactant.

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Synthesis and super-swelling behavior of a novel protein-based superabsorbent hydrogel

Cited by 94 publications

References 25 publications

Salt- and pH-Resisting Collagen-based Highly Porous Hydrogel

Salt- and pH-Resisting Collagen-based Highly Porous Hydrogel

Grafting Copolymerization of Hydrophilic Monomers Onto Alginate for Modification it's Structure

Synthesis, characterization and swelling properties of guar gum-g-poly(sodium acrylate-co-styrene)/muscovite superabsorbent composites

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