Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Fabrication and characterization of photocrosslinked phase change materials by using conventional and terahertz spectroscopy techniques
Date
2019-12-01
Author
Aytan, Emre
Aytekin, Yusuf Samet
Esentürk, Okan
KAHRAMAN, MEMET VEZİR
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
226
views
0
downloads
Cite This
A series of novel photocrosslinked shape-stabilized phase change materials (PCMs) based on tetradecanol and lauric acid have been prepared by UV technique for the purpose of thermal energy storage applications. Both lauric acid and tetradecanol were reacted with glycidyl methacrylate to form acrylated structures for covalently integrate into polyurethane (PU) based UV matrix to prevent leakage problem. The heating process phase change enthalpy is measured between 9 and 77 J/g, and the freezing process phase change enthalpy is found between 1,29 and 35 J/g. All the photocrosslinked PCMs improved latent heat storage capacity in comparison with the pristine PU sample. Phase changing properties of the samples were also investigated by THz spectroscopy. Two spectral features were observed for L20 sample at 0.85 THz and 1.1 THz while no feature was observed for the other samples. The results suggest that the THz spectroscopy can be a complementary technique for characterization of the phase changing polymeric materials.
Subject Keywords
Phase change material
,
Terahertz spectroscopy
,
Photocrosslink
URI
https://hdl.handle.net/11511/34684
Journal
Journal of Energy Storage
DOI
https://doi.org/10.1016/j.est.2019.100989
Collections
Department of Chemistry, Article
Suggestions
OpenMETU
Core
Experimental analysis of energy storage device using phase change material integrated with a milk storage system
Nıma, Bonyadı; Somek, Suleyman Kazım; C Cıhan, Ozalevlı; Baker, Derek Keıth; Tarı, İlker (null; 2015-08-12)
Phase change materials (PCMs) have the advantage of storing latent heat at constant temperature and can possess higher energy storage densities in comparison to materials storing sensible heat. Due to these features, latent heat Thermal Energy Storage (TES) devices using PCMs are widely used to store heat in thermal systems. The aim of this study is to experimentally investigate the performance of water PCM in an improved milk storage cooling cycle integrated with a TES device. In this prototype, water is u...
Optical characterization of silicon based hydrogenated amorphous thin films by un-visible and infrared measurements
Kılıç, İlker; Katırcıoğlu, Bayram; Department of Physics (2006)
Various carbon content hydrogenated amorphous silicon carbide (a-Si1ŁxCx:H) and hydrogenated amorphous silicon (a-Si:H) thin films have been deposited on various substrates by using plasma enhanced chemical vapour deposition (PECVD) technique. Transmission spectra of these films have been determined within UV-Visible region and the obtained data were analysed to find related physical constants such as; refractive indices, thicknesses, etc. Fourier transform infrared (FT-IR) spectrometry technique has been u...
Enhancement of the Thermal Energy Storage Using Heat-Pipe-Assisted Phase Change Material
Behi, Hamidreza; Behi, Mohammadreza; Ghanbarpour, Ali; Karimi, Danial; AZAD, ARYAN; Ghanbarpour, Morteza; Behnia, Masud (2021-10-01)
Usage of phase change materials' (PCMs) latent heat has been investigated as a promising method for thermal energy storage applications. However, one of the most common disadvantages of using latent heat thermal energy storage (LHTES) is the low thermal conductivity of PCMs. This issue affects the rate of energy storage (charging/discharging) in PCMs. Many researchers have proposed different methods to cope with this problem in thermal energy storage. In this paper, a tubular heat pipe as a super heat condu...
DEVELOPMENT OF BORIDES/BORATES FOR ENERGY STORAGE DEVICES
Bahtiyar, Doruk; Aydınol, Mehmet Kadri; Department of Metallurgical and Materials Engineering (2022-9)
For many years, materials in the form of metal sulfides, oxides, phosphates, and titanates have been developed as cathode and anode active materials to be used in energy storage devices. Borides and borates, recently, attracted the attention of researchers in this field. In this study, for the development of a new class of materials for energy storage applications, synthesis and characterization of metal (Fe, Mo, Mn, and V) borides and (Mn, and Y)borates were carried out. The obtained materials were tested ...
Construction of terahertz spectrometers and their use in characterization of conductivities and modulation behaviors of graphene layers /
Kaya, Emine; Esentürk, Okan; Department of Chemistry (2017)
Aim of this thesis was to construct two new terahertz spectrometers, THz Time Domain Spectroscopy (THz-TDS) and Time Resolved THz Spectroscopy (TRTS) for characterization of the static and dynamic properties of novel materials. After successful construction and signal optimization, system characterizations of both systems were completed with well-known samples. Possible use of ionic liquid doped graphene devices on PVC and PE substrates were characterized by THz-TDS. Devices operated at low voltages and pro...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
E. Aytan, Y. S. Aytekin, O. Esentürk, and M. V. KAHRAMAN, “Fabrication and characterization of photocrosslinked phase change materials by using conventional and terahertz spectroscopy techniques,”
Journal of Energy Storage
, pp. 0–0, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/34684.