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Improving Thermosolar Energy Storage with Biodegradable Polyester Nanocomposite Phase Change Materials
Author(s) -
Silva Valdilene O.,
Lima Thaíses B.S.,
Aquino Katia A.S.,
da Silveira Filho Elmo D.,
Araujo Elmo S.,
Araujo Patricia L. B.
Publication year - 2019
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201800047
Subject(s) - materials science , differential scanning calorimetry , thermogravimetric analysis , phase change material , nanocomposite , enthalpy of fusion , fourier transform infrared spectroscopy , polyester , chemical engineering , latent heat , thermal energy storage , thermal stability , composite material , thermal , melting point , engineering , ecology , physics , biology , meteorology , thermodynamics
Form‐stable solid‐liquid phase change materials (FSSL‐PCM) are capable of latent heat storage by absorbing thermal energy at constant temperature while undergoing solid‐liquid state transitions. We suggest new nanocomposites based on biodegradable polyesters Poly(ϵ‐caprolactone) (PCL), Poly(3‐hidroxybutyrate) (P‐3‐HB) or their blends with Poly(ethylene oxide) (PEO) embedded in the nanopores of thermally expanded natural graphite (EG) as FSSL‐PCM. These nanocomposites are submitted heating‐cooling cycles, in the fusion‐crystallization temperature range, without appreciable changes in thermal stability or latent heat storage capabilities, as assessed by Fourier Transform Infrared (FTIR) Spectroscopy Analysis, Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC). Such materials are suitable as PCMs used as storage media in solar energy‐based low‐medium temperature latent storage systems, for example, water‐heating systems, air‐heating units, solar greenhouses, among others.