A) and an infrared camera (FLIR E5-XT, North Billerica, MA, USA) were employed to observe the solar hermal power conversion, storage and release behavior in the prepared samples. Meanwhile, the solar hermal power harvesting and storage of sample through 200 times cycling tests was confirmed by simulative light supply and DSC evaluation, and the structural stability was also verified via FT-IR and XRD evaluation, respectively. three. Final results and Discussion 3.1. Morphology and Structure of your FSPCMs SEM pictures, as shown in Figure 1a , had been utilized to monitor the morphologies evolution of PU, UP, UPAx and UPAx/PW. The as-prepared PU foam showed a 3D continuous porous structure, plus the walls of pores are comparatively smooth (Figure 1a). The UP skeletons have been also observed as presented in Figure 1b, along with the walls of UP skeletons exhibited a coarse landscape texture resulting from the pyrrole in situ polymerization on the surface of PU skeletons. Taking UPA3 as an instance, just after additional modifying the PU with Ag/PPy composites, the walls of its skeletons became rougher (Figure 1c), which was much more conducive to arresting and constraining the melting PW due to capillary impact and intermolecular interaction. To additional confirm the distribution of Ag/PPy composites within the PU skeletons, the Linsitinib Purity & Documentation elemental mapping measurement was conducted, and also the corresponding outcomes are presented in Figure 1e . As we are able to see, the elemental C, O, N and Ag mainly assembled on the walls of PU skeletons homogeneously. Moreover, due to the regional surface plasma resonance impact (LSPR) of silver [36], the UPA3 had enhanced solar harvesting capability and heat conductivity, resulting within the rapid C2 Ceramide Formula temperature improve of 98.7 C in the UPA3 in 1.0 min below 300 mW/cm2 irradiation power (Figure S2a); in contrast, the pure PU foam only reached 49.7 C (Figure S2b). The UPAx were immersed into the melting paraffin to prepare a group of novel FSPCMs under the vacuum-assisted condition. The morphology from the representative UPA3/PW was investigated by way of SEM observation. Figure 1d showed that the absorbed PW completely filled in the inner cavities or tightly intertwined with all the skeletons of your UPA3, indicating the UPAx presented a 3DNanomaterials 2021, 11,of 98.7 of the UPA3 in 1.0 min under 300 mW/cm2 irradiation power (Figure S2a); in contrast, the pure PU foam only reached 49.7 (Figure S2b). The UPAx were immersed in to the melting paraffin to prepare a group of novel FSPCMs beneath the vacuum-assisted four of 10 condition. The morphology of the representative UPA3/PW was investigated by means of SEM observation. Figure 1d showed that the absorbed PW fully filled in the inner cavities or tightly intertwined using the skeletons in the UPA3, indicating the UPAx offered a 3D continuous porous platform to successfully arrest and constrain the melting PW molecules. continuous porous platform to proficiently arrest and constrain the melting PW molecules. Alternatively, as shown in Figure S3, even ifif theworking temperature was above On the other hand, as shown in Figure S3, even the operating temperature was above PW’s phase-transition temperature, the FSPCMs not merely maintained a a solid state but additionally PW’s phase-transition temperature, the FSPCMs not only maintained strong state but also had been leak-proof. were leak-proof.Figure 1.1. SEM images of(a) PU, (b) UP, (c) UPA3, (d) UPA3/PW and (e) elemental mapping images Figure SEM pictures of (a) PU, (b) UP, (c) UPA3, (d) UPA3/PW and (e) elemental mapping imag.