Assessment of the hydration/dehydration behaviour of MgSO4∙7H2O filled cellular foams for sorption storage applications through morphological and thermo-gravimetric analyses

Abstract

Està subjecte a una llicència de Reconeixement-NoComercial-SenseObraDerivada 4.0 de Creative Commons Assessment of the hydration/dehydration behaviour of MgSO4•7H2O filled cellular foams for sorption storage applications through morphological and thermo-gravimetric analyses

Morphological and Structural Evaluation of Hydration/Dehydration Stages of MgSO4 Filled Composite Silicone Foam for Thermal Energy Storage Applications

“…Analyzing the details of Figure 2 (left), it is possible to highlight the channel interconnection among bubbles. These channels act as preferential pathways for the water vapor diffusion toward the inner parts of the foams [21], avoiding limiting mass diffusion phenomena usually observed on composite sorbent materials [25]. Furthermore, the cell walls were thick enough to lead to a structurally stable morphology.…”

“…The flexibility characteristics of this foam can improve the cycling and mechanical stability of the composite, allowing an expansion of the salt hydrate volume during the hydration process. Such an approach, firstly proposed in zeolite-silicone foam composites for heat pump and chiller applications [20], was applied to hybrid salt-silicone foams in [21]. In order to bring the silicone composite foam concept to practical application, further effort is needed in the characterization and rigorous assessment of the properties of the system and the correlation between the structure and the behavior of the material under TES boundary conditions.…”

Micro‐tomographic characterization of composite recycled glass‐silicone foams for applications in civil engineering

“…The cell size distribution is almost homogeneous mainly at low filler content foams. However, some heterogeneities on composite foams are shown by increasing the filler content (i.e., local large size bubbles or voids in the structure, indicating a possible bimodal distribution of the cells) …”

“…As previously discussed, these foams are characterized by an open/closed cell structure with narrow opening windows that guarantee the connection among neighboring cells. Due to the large bubble interconnection, the bubble shapes appear not regular or spheroidal …”

“…According to Refs. 25 and 42, a usual threshold filler content can be identified above which a significant modification on bubble size and distribution occurs. The integration of this information may allow deducing the threshold filler content that can be used to obtain a suitable and reliable heat‐insulating material in the civil engineering field.…”