Encapsulation of paraffin wax by rigid cross-linked poly (styrene divinylbenzene-acrylic acid) and its thermal characterization

Abstract

The latent heat phase change materials (PCMs) have emerged as an important and effective thermal storage material. The massive change in volume and the requirement for specialized containment of PCMs limits the thermal storage application of the common PCM like paraffin wax. Herein, we report the encapsulation of paraffin wax with the crosslinked poly(styrene-divinylbenzene-acrylic acid) shell via suspension polymerization. The optical and SEM images of the prepared encapsulated phase change materials (EPCMs) were in the size range of 200-500 µm. The thermal chargingdischarging rate of the EPCM was studied using a facile water bath technique. It was found that the optimized EPCM showed about 1.7 times faster-charging and 3.5 times faster discharging rate compared to reference PCM (without encapsulation). The latent heat for the EPCM was found to be about 3.3 times higher than the reference PCM. The thermal charging-discharging ability and latent heat values are higher for the encapsulated paraffin wax when compared with reference paraffin wax. The encapsulation of paraffin wax by polymeric materials via facial suspension polymerization using polymerizable vinyl monomers could find its application as heat storage materials.

Investigation of the thermal properties of candle wax material

“…Therefore, we assume the material was mixed of paraffin and palm stearin. This finding can be in consistence with the higher melting heat of paraffin (151.62 J/g) given in [12]. Authors in [13] present even higher melting heat of various paraffin materials up to 196 J per gram.…”

“…Comparing our results to those of mentioned, we can assume, that the material measured in our study was not composed only of palm stearin. Pradhan and Ramaswamy [12] reported the temperature about 60 °C for paraffine wax. Therefore, we assume the material was mixed of paraffin and palm stearin.…”

Influence of geometrical parameters arrangement on solidification process of ice-on-coil storage system

“…In this system, PCM to be used for which, Paraffin Wax, Myo-inositol, HDPE, NaOH-H 2 O and KNO 3 -NaNO 2 -NaNO 2 materials looked more promising. Pradhan and Ramaswamy [28] reported the encapsulation of paraffin wax with the cross-linked poly (styrene-divinylbenzene-acrylic acid) shell via suspension polymerization. The thermal charging-discharging rate of the considered encapsulated phase change materials (EPCM) was studied using a facile water bath technique.…”