Graphene oxide stabilized polyethylene glycol for heat storage

Abstract

Graphene oxide (GO) sheets were introduced to stabilize the melted polyethylene glycol (PEG) during the solid-liquid phase change process, which can be used as a smart heat storage system. The structural properties and phase change behaviors of the PEG-GO composites were comprehensively investigated as a function of the PEG content by means of various characterization techniques. The highest stabilized PEG content is 90 wt% in the composites, resulting in a heat storage capacity of 156.9 J g(-1), 93.9% of the phase change enthalpy of pure PEG. Notably, GO has much stronger impact on lowering of the phase change temperature of PEG compared with some other porous carbon materials (activated carbon and ordered mesoporous carbon) due to the unique thin layer structure of GO. Because of the high heat storage capacity and the moderate phase change temperature, the PEG-GO composite is a promising heat energy storage candidate at mild temperature.

Porous self-protonating spiropyran-based NIPAAm gels with improved reswelling kinetics

“…This extraction was confirmed by ATR-FT-IR spectroscopy ( Figure S1). The specific PEG peaks at 2883 cm −1 (stretching vibration of the C-H) [37], 1466 and 1341 cm −1 (deformation vibration of the C-H bonds) [37], 1279 and 1241 cm −1 (the bending vibration of the O-H) [37] do not appear in the spectrum of the poly(NIPAAm-co-BSP-A-co-AA) porous gel following the washing protocol described in the experimental section.…”

Synthesis, characterization, and antimicrobial properties of novel double layer nanocomposite electrospun fibers for wound dressing applications

“…Stretching vibration shown at 1,140 cm -1 is related to the C-O bond. 42 The additional band characteristic of chlorhexidine appears at 1,492 cm -1 , which is related to the chlorophenol groups of chlorhexidine. 41 …”

Sensitization of LnIII (Ln = Eu, Tb, Tm) Ion Luminescence by Functionalized Polycarbonate‐Based Materials and White Light Generation

“…[32] The absence of crystalline PEG peaks between 10-40°in the diffractograms also indicates the successful synthesis of the PCbased materials. [33] The thermal properties of the new polymers were evaluated. The TGA curves for both polymers show an initial weight loss at 100°C due to evaporation of water and/or loss of small organic groups (Figure 3).…”