Swelling and auramine-O adsorption of carboxymethyl cellulose grafted poly(methyl methacrylate)/Cloisite 30B nanocomposite hydrogels
| Autor: | Maryam Abdolhosseinzadeh, Seyed Jamaleddin Peighambardoust, Hamid Erfan-Niya, Parisa Mohammadzadeh Pakdel |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Polymers and Plastics General Chemical Engineering Radical polymerization macromolecular substances 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Adsorption Materials Chemistry medicine Methyl methacrylate Nanocomposite technology industry and agriculture 021001 nanoscience & nanotechnology Poly(methyl methacrylate) 0104 chemical sciences Carboxymethyl cellulose chemistry Chemical engineering visual_art Self-healing hydrogels visual_art.visual_art_medium Swelling medicine.symptom 0210 nano-technology medicine.drug |
| Zdroj: | Iranian Polymer Journal. 27:807-818 |
| ISSN: | 1735-5265 1026-1265 |
| DOI: | 10.1007/s13726-018-0654-1 |
| Popis: | Carboxymethyl cellulose (CMC) grafted poly(methyl methacrylate)/Cloisite 30B nanocomposite hydrogels were prepared for adsorptive removal of auramine-O (as a cationic dye model) from wastewater. For the synthesis of nanocomposite hydrogel by free radical polymerization method, potassium persulfate (KPS), methyl methacrylate (MMA), N,N′-methylene bisacrylamide (MBA) and Cloisite 30B were used as initiator, monomer, cross-linker and nano-filler, respectively. The nanocomposite hydrogels were characterized by FTIR, TGA, SEM and XRD techniques. The FTIR results showed that the monomer was grafted onto carboxymethyl cellulose chains successfully. Swelling behavior of nanocomposite hydrogel as a function of KPS, MBA, MMA concentration and CMC/Cloisite 30B weight ratio was studied by Taguchi method using Minitab 16 software. According to ANOVA results, the most effective factor of equilibrium swelling of nanocomposite hydrogel was CMC/Cloisite 30B weight ratio. Addition of Cloisite 30B to hydrogel up to a certain amount improved swelling, though its high amount decreased swelling. The effects of pH and ionic strength on swelling of optimum hydrogels were investigated. Maximum swelling of nanocomposite hydrogel occurred at pH 7.0. The kinetic data of adsorption fitted well to pseudo-second-order model. The best isotherm for investigation of adsorption mechanism was Langmuir model suggesting the formation of a monolayer on the adsorbent surface. FTIR results, before and after auramine-O adsorption, showed that complexation is the main mechanism of adsorption. High adsorption capacity of nanocomposite hydrogels made them more efficient in wastewater treatment application. |
| Databáze: | OpenAIRE |
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