Novel carrageenan-based hydrogel nanocomposites containing laponite RD and their application to remove cationic dye

Synthesis and characterization of poly(aspartic acid) composite hydrogels with inorganic MCM-41 cross-linker

“…The three-dimensional (3D) network structure of hydrogels, which features excellent hydrophilicity and swelling to enable solid gel formation whilst maintaining its physical structure without dissolution [1], has prompted their use in numerous applications, such as medicine [2,3], drug delivery [4], biotechnology [5], absorbent sanitary products [6], agriculture [7] and water treatment [8,9]. Hydrogels are highly absorbent of water but poorly absorb physiological saline.…”

Synthesis of magnetic carboxymethyl chitosan-g-poly(acrylamide)/laponite RD nanocomposites with enhanced dye adsorption capacity

“…In our previous works, we reported nanocomposite hydrogels by incorporation of neat laponite RD clay. The adsorption of CV onto HPMC/laponite RD and kappa-carrageenan/laponite RD nanocomposite hydrogels showed that the experimental isotherm data followed well Langmuir model and maximum adsorption capacities were obtained 80.2 and 77 mg g -1 for kappa-carrageenan/laponite RD [23] and HPMC/laponite RD [32], respectively. In this study, the experimental adsorption capacities of mCMC-gPAAmLap1, mCMC-g-PAAmLap2, mCMC-g-PAAmLap3, and mCMC-gPAAmLap4 for CV were obtained 120, 132, 153, and 169 mg g -1 , respectively.…”

“…Then, the magnetic laponite RD fluid was added to the carboxymethyl chitosan solution, and magnetic nanocomposites were obtained after adding acrylamide, methylenebisacrylamide, and initiator. In our previous work, we reported the synthesis of hydrogel nanocomposites, where neat laponite RD was used as a crosslinker instead of MBA crosslinker [23]. After magnetizing of the laponite RD, it was examined as crosslinker.…”

“…The maximum and minimum water-absorbing capacity was found to be 32.6 and 2.4 g g -1 for CMC-gPAAm and mCMC-g-PAAmLap4, respectively. This decrement in water absorbency can be attributed to the interactions between polymer chains and laponite RD (or magnetite nanoparticles) that causing more physical crosslinking points, and thereby the water absorbency is decreased [23,28].…”

Fabrication of electric-stimuli responsive polyaniline/laponite composite and its viscoelastic and dielectric characteristics

“…1(b) had a rough surface with the presence of laponite. Ionic and polar interactions at the laponite-PANI surface would induce physical cross-linking[39]. This nanocomposite in a powder form is well consisted of laponite particles and PANI.…”