Effect of multiwalled carbon nanotube (MWNT) on the behavior of swelling of polyacrylamide-MWNT composites
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The purpose of this paper is to discuss the role of multiwalled carbon nanotube in the swelling of polyacrylamide-multiwalled carbon nanotube composites. Swelling experiments were performed in water at various temperatures by real-time monitoring of the decrease in pyranine (Py) and emission light intensity (I-em). The Stern-Volmer equation is modified for low-quenching efficiencies to interpret the behavior of pyranine intensity during the swelling of polyacrylamide-multiwalled carbon nanotube composites. The Li-Tanaka equation was used to determine the swelling time constants tau and cooperative diffusion coefficients D from fluorescence intensity weight and volume variations of the composite at various temperatures. It was observed that when tau decreased naturally D increased by increasing temperatures.