Recycling of reactive dye using semi‐interpenetrating polymer network from sodium alginate and isopropyl acrylamide | Zendy

Dhanapal V. | Zendy; Subramanian K. | Zendy

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Recycling of reactive dye using semi‐interpenetrating polymer network from sodium alginate and isopropyl acrylamide

Author(s) -

Dhanapal V.,

Subramanian K.

Publication year - 2015

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.41436

Subject(s) - acrylamide , polymer science , polymer , isopropyl , chemistry , polymer chemistry , chemical engineering , organic chemistry , monomer , engineering

A sequence of semi-interpenetrating polymer network (semi-IPN) were synthesized by free radical photo copolymerizing acrylic acid and isopropyl acrylamide (NIPAAm) in aqueous sodium alginate (NaAlg). Their structures (FT-IR), thermal stability (TG/DTG), morphology (SEM), mechanical properties, reactive blue 4 (RB 4) dye adsorption (624 mg/g) and its dying characteris- tics, reusability of dye and adsorbent were evaluated. TG thermograms of semi-IPN in air revealed zero order kinetics for initial step thermal degradation with an activation energy of 68.68 kJ/mol. Dye adsorption showed best fit for Langmuir adsorption isotherm and the kinetics followed pseudo-second-order model. The water and dye diffusion kinetics followed non-Fickian mechanism. The changes in thermodynamic parameters namely Gibbs free energy (DG ), entropy (DS ) and enthalpy (DH ) indicated that the adsorp- tion was spontaneous and exothermic process for RB 4/semi-IPN system. V C 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40968.

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