Entity: Universitat Rovira i Virgili (URV)
Confidenciality: No
Education area(s): Nanociència, Materials i Processos - Tecnologia Química de Frontera
Title in different languages: Polymer layered silicate nanocomposites for latent heat thermal energy storage
Abstract: The use of adequate thermal energy storage (TES) systems has shown the potential to increase energy efficiency in many fields, such as the building sector. Shape-stabilized phase change materials (SS-PCM) have attracted attention to address one of the key barriers of phase change materials (PCM), the liquid management, that nowadays limits its applicability. However, SS-PCM still have drawbacks to overcome, such as poor mechanical properties, fire reaction and thermal stability. In the present study, polymeric SS-PCM are nano-enhanced with layered silicates to overcome these drawbacks. The new shape-stabilized nano-enhanced phase change material (SS-NEPCM) is based on ethylene propylene diene monomer (EPDM) as polymeric matrix, palmitic acid (PA) as PCM and montmorillonite (MMT) as the layered silicate. An innovative method based on a Banbury mixer was used to prepare it, that is an industrially scalable fabrication method. To evaluate the effect of each component, eight different formulations were prepared: pure EPDM, EPDM with MMT additions (1 wt.%, 3 wt.% and 5 wt.%), EPDM with PA additions (5 wt.% and 10 wt.%) and EPDM with MMT (3 wt.%) and PA additions (5 wt.% and 10 wt.%). As it was investigated by Fourier-transform infrared (FT-IR) spectroscopy, the composite materials obtained were not degraded by processing. The results obtained by X-ray diffraction showed that an ordered intercalated morphology is formed between EPDM chains and MMT. Thermogravimetric experimental results revealed an increase in the thermal stability of SS-NEPCM as a result of the barrier effect provided by MMT. Moreover, SS-NEPCM fire resistance was improved with a great reduction or avoidance of the dripping phenomenon. Additionally, dynamic mechanical thermal analyses demonstrated that 3 wt.% MMT is an optimum content to enhance thermomechanical properties in the EPDM rubbery region.
Subject: Enginyeria química
Academic year: 2018-2019
Language: Anglès
Work's public defense date: 2019-09-09
Subject areas: Chemical engineering
Student: Martín Llop, Marc
Work's codirector: Barreneche Güerisoli, Camila
Department: Química Física i Inorgànica
Creation date in repository: 2021-03-11
TFM credits: 24
Keywords: polymer layered silicate, thermal energy storage, nanocomposite
Title in original language: Polymer layered silicate nanocomposites for latent heat thermal energy storage
Project director: Renna Fernández, Inés
Repositori URV