Facile application of terahertz spectroscopy in UV-coated and phase change material loaded MPS


Aytan E., Aytekin Y. S., Aytan T. A., Esenturk O., Kahraman M. V.

Polymer Bulletin, cilt.81, sa.3, ss.2447-2464, 2024 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 81 Sayı: 3
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1007/s00289-023-04827-0
  • Dergi Adı: Polymer Bulletin
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Chemical Abstracts Core, Chimica, Compendex, INSPEC
  • Sayfa Sayıları: ss.2447-2464
  • Anahtar Kelimeler: Differential scanning calorimetry (DSC), Mesoporous material, Phase change materials, Photopolymerization, Terahertz spectroscopy
  • Marmara Üniversitesi Adresli: Evet

Özet

In this study, capability of Terahertz (THz) spectroscopy for determination of thermal properties of phase change materials (PCM) in an acrylated polyurethane coating investigated. Spherical shaped mesoporous silica materials (MPSs) are prepared as a template for stearic acid (SA). SA was impregnated into MPSs for investigate its PCM properties. Surface of MPSs was modified with 3-(Trimethoxysilyl)propyl methacrylate (MEMO) to add acrylate functionality to form covalently bond to polyurethane (PU)-based composite UV matrix to avert leakage problem. Finally, this resin was photopolymerized and its change in thermal properties was determined by both conventional Differential Scanning Calorimetry (DSC) and THz. DSC results show that the heating process phase change enthalpy is measured between 20.83 J/g and 136.80 J/g, and the freezing process phase change enthalpy is found between 13.55 J/g and 181.13 J/g by DSC. The thermal properties of phase changing behavior of the sample were also analyzed by Terahertz Time Domain Spectroscopy (THz-TDS). Besides the phase changes THz spectroscopy has shown the temperature dependent variation in the host matrix, also final PCM sample. Comparison of the data suggest that THz Spectroscopy is a fairly strong technique for characterization of phase changing materials even in very complex resin environment and it is a strong complementary technique especially following the temperature dependent properties close to room temperature. Graphical abstract: [Figure not available: see fulltext.]