Journal ArticleDOI
Synthesis of Crosslinked Networks of Gum ghatti with Different Vinyl Monomer Mixtures and Effect of Ionic Strength of Various Cations on its Swelling Behavior
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In this article, a series of pH, temperature, and electrical stimulus sensitive novel hydrogels of Gum ghatti (Gg) with vinyl monomer mixtures of acrylamide (AAm) with acrylic acid (AA), acrylonitrile (AN), and methacrylic acid (MAA) using potassium persulphate-ascorbic acid redox pair as an initiator and N,N’-methylene-bis-acrylamides (MBA) as a crosslinker was synthesized using a free radical polymerAbstract:
A series of pH, temperature, and electrical stimulus sensitive novel hydrogels of Gum ghatti (Gg) with vinyl monomer mixtures of acrylamide (AAm) with acrylic acid (AA), acrylonitrile (AN), and methacrylic acid (MAA) using potassium persulphate-ascorbic acid redox pair as an initiator and N,N’-methylene-bis-acrylamide (MBA) as a crosslinker was synthesized using a free radical polymerization process. Initially, different reaction parameters for the graft copolymerization and crosslinking of Gum ghatti with AAm and MBA were optimized. Afterwards, optimization of AA, AN, and MAA in combination with preoptimized AAm was carried out. Synthesized products were characterized by FT-IR, SEM, XRD, and TGA/DTA/DTG. Swelling behavior of hydrogels was investigated in deionized water as a function of time, temperature, and pH of swelling medium. Moreover, hydrogels have been found to exhibit cationic charge-dependent swelling in different salt solutions of Na+, Ba2+, Fe3+, and Sn4+. The order of swelling was found to ...read more
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Recent progress in the structural modification of chitosan for applications in diversified biomedical fields
Hemant Mittal,Hemant Mittal,Suprakas Sinha Ray,Suprakas Sinha Ray,Balbir Singh Kaith,Jaspreet Kaur Bhatia,Sukriti,Jitender Sharma,Saeed M. Alhassan +8 more
TL;DR: This article critically reviews the recent developments in the structural modifications of chitosan and its nano-structured variants produced via different techniques and their potential applications in diversified biomedical fields such as tissue engineering, drug delivery, wound healing, and gene therapy.
Journal ArticleDOI
Adsorption of methyl violet from aqueous solution using gum xanthan/Fe3O4 based nanocomposite hydrogel.
TL;DR: The utilization of gum xanthan-grafted-polyacrylic acid and Fe3O4 magnetic nanoparticles based nanocomposite hydrogel (NCH) for the highly effective adsorption of methyl violet (MV) from aqueous solution is reported.
Journal ArticleDOI
In-Situ Synthesis of ZnO Nanoparticles using Gum Arabic Based Hydrogels as a Self-template for Effective Malachite Green Dye Adsorption
TL;DR: In this paper, the use of gum Arabic grafted polyacrylamide (GA-cl-PAM) hydrogel as a self-template for the in situ synthesize of zinc oxide nanoparticles (ZnO NPs) and the application of synthesized nanocomposite as a potential adsorbent to remove synthetic dyes especially malachite green from aqueous solution.
Journal ArticleDOI
Recent progress on the design and applications of polysaccharide-based graft copolymer hydrogels as adsorbents for wastewater purification
TL;DR: In this paper, the abstract of the full text item is extracted from the publisher's website and the abstract is used to obtain a full text version of the abstract for the full article.
Journal ArticleDOI
Effective removal of cationic dyes from aqueous solution using gum ghatti-based biodegradable hydrogel.
TL;DR: The Gg-cl-P(AAm-co-MAA) hydrogel could be a potential adsorbent for the remediation of dyes from industrial wastewater.
References
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Journal ArticleDOI
The Scherrer Formula for X-Ray Particle Size Determination
TL;DR: An exact derivation of the Scherrer equation is given for particles of spherical shape, values of the constant for half-value breadth and for integral breadth being obtained in this article, and various approximation methods which have been used are compared with the exact calculation.
Journal ArticleDOI
Swelling of Ionic Gels : Quantitative Performance of the Donnan Theory
J. Ricka,Toyoichi Tanaka +1 more
TL;DR: In this paper, the theorie emise est appliquée a la prevision quantitative du gonflement d'un gel acrylamide-acide acrylique.
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pH-Dependent Equilibrium Swelling Properties of Hydrophobic Polyelectrolyte Copolymer Gels
TL;DR: Etude a 25°C de polymeres reticules a base de methacrylates de n-alkyle and de (dimethyl-amino) ethylmethacrylate Gonflement dans l'eau Transition de l'etat hydrophobe a l"etat hyphile Influence de la composition du comonomere
Journal ArticleDOI
Modified chitosan 4. Superabsorbent hydrogels from poly(acrylic acid-co-acrylamide) grafted chitosan with salt- and pH-responsiveness properties
TL;DR: In this paper, the effect of reaction variables, such as MBA concentration and AA/AAm ratio on the water absorbency capacity have been investigated, and the swelling variations were explained according to swelling theory based on the hydrogel chemical structure.
Journal ArticleDOI
Deformation of polyelectrolyte gels under the influence of electric field
Tohru Shiga,Toshio Kurauchi +1 more
TL;DR: In this paper, the deformation of acrylic acid-acrylamide copolymer gels in an aqueous solution under the influence of a dc electric field was studied.