Improved latent heat storage properties through mesopore enrichment of a zeolitic shape stabilizer

Taş, Cüneyt Erdinç; Karaoğlu, Öznur; Taş, Buket Alkan; Ertaş, Erdal; Ünal, Hayriye; Bildirir, Hakan

doi:10.1016/j.solmat.2020.110677

Cited by 7 publications

(2 citation statements)

References 43 publications

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“…Following the evaluation of fundamental features and light-tothermal energy conversion performance of the samples, PS@ PDA having the highest photothermal capability among the prepared hybrid materials was utilized in latent heat energy application, which is a phenomenon used in the energy field that mainly targets keeping the temperature of a local environment within a constant range. 53 For this purpose, PEG 4000, which was chosen as the PCM in this study due to its suitable phasetransition temperatures, was directly mixed into a PS@PDA dispersion at various ratios. The solid forms of PS@PDA/PCM composite systems with the PEG content ratios of 1:1, 1:2, 1:3, and 1:4 were produced after drying them, and their latent heatstorage performances were investigated in detail.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Effect of the Preparation Methodology of Polydopamine-Containing Systems over Light-to-Thermal Energy Conversion Performance

Taş¹

2023

ACS Appl. Polym. Mater.

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Polydopamine (PDA) is an attractive material utilized for a wide range of scientific purposes, including light-tothermal energy conversion, because of presenting plenty of advantages. The proper integration way of PDA into a system is critical to benefit from the PDA content in maximum. Here, the two main PDA-containing composite preparation methods were compared in terms of fundamental material properties and the light-to-thermal energy conversion ability of the final product. For this purpose, the classical emulsion polymerization method first synthesized an aqueous dispersion of polystyrene nanoparticles (PS). PDA was then integrated into the system via two different preparation methods: coating the surfaces of polystyrene nanoparticles with a PDA layer while PS is in a dispersion state (PS@PDA) and adding separately synthesized PDA nanoparticles into the PS dispersion medium (PS−PDA). Two prepared composite systems were fundamentally characterized by dynamic light scattering (DLS), ultraviolet−visible (UV−vis) spectroscopy, and scanning electron microscopy (SEM) while in their dispersion state, and by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), Fourier-transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD) while in their solid state, which was obtained after the water evaporated. As the targeted property, the solid forms of these were investigated in terms of light-to-thermal energy conversion performance with solar and laser light exposure under 1 SUN and at 808 nm, respectively. The results showed that the composite system prepared by coating surfaces of PS nanoparticles with the PDA layer had higher light-to-thermal energy conversion under both conditions than those prepared by separately added PDA nanoparticles into the dispersion system. To show one of the possible applications of the prepared composites, in addition to the main target, the solid form of the composite system, which was prepared by coating surfaces of PS nanoparticles with the PDA layer, was also evaluated in detail concerning the latent heat-storage ability with incorporation of PEG 4000 as a phase-change material (PCM) into the system. It was found that the prepared shape-stable phase-change composite with a ratio of 1:3 between PS@PDA and PEG 4000 resulted in a latent heat of 126.9 J/g.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Effect of the Preparation Methodology of Polydopamine-Containing Systems over Light-to-Thermal Energy Conversion Performance

Taş¹

2023

ACS Appl. Polym. Mater.

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“…[9] FSPCMs are usually prepared by filling PCMs into porous materials (e. g., zeolite, aerogel, foam etc.). [4,[10][11][12] Although the leakage of melting PCMs can be avoided, thermal energy storage and phase transition of final FSPCMs is significantly affected by pores. [13,14] In addition, PCMs are usually coated on fabrics or incorporated into fibers for PTM.…”

Section: Introductionmentioning

confidence: 99%

Nanofibrous Membranes in Multilayer Fabrics to Avoid PCM Leakages

et al. 2022

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Incorporating phase change materials (PCMs) into textiles is one facial method to realize personal thermal management (PTM). Despite the significant progress of PCM‐incorporated textiles, the incorporation of PCMs into textiles remains an outstanding challenge. In this work, we described a sandwich‐like multi‐layer PCM fabric, which consisted of nanofibrous membranes as barrier layers and PCM‐loaded viscose fabric as a PCM‐loaded layer. Three common organic PCMs including polyethylene glycol (PEG), paraffin wax (PW) and myristic acid (MA), and the polyurethane (PU) nanofibrous membranes was used. As a result, we achieved that weak interfacial adhesion between melting PCMs and PU nanofibrous membranes accounted for leakage phenomena. Only the sample (UPWV) with PU nanofibrous membranes as barrier layers and paraffin wax (PW) as PCMs had no leakage. Little confinement of PW crystallization in the UPWV was found. Besides, thermal energy storage, phase transition, and thermal buffering effect of UPWV supported various applications.

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Tuning (Photo)Electronic Properties of an Electron Deficient Porous Polymer via n‐Doping with Tetrathiafulvalene

Bildirir,

García‐Tecedor,

Gomez‐Mendoza

et al. 2024

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Charge‐transfer complex formation within the pores of porous polymers is an efficient way to tune their electronical properties. Introduction of electron accepting guests to the electron donating hosts to conduct their p‐doping is intensively studied in this context. However, the vice versa scenario, n‐doping by treating the electron deficient (i.e., n‐type) porous polymers with electron donating dopants, is rare. In this work, synthesis of an n‐type phenazine based conjugated microporous polymer and its exposure to strong electron donating tetrathiafulvalene (TTF) dopants are presented. The fundamental physical characterizations (e.g., elemental analysis, gas sorption) showed that the vacuum impregnation technique is a good approach to load the guest molecules inside the pores. Moreover, the formation of charge‐transfer complexes between the phenazine building blocks of the polymeric network and TTF dopants are confirmed via spectral techniques such Fourier transform infra‐red, UV–vis, steady‐state/time‐resolved photoluminescence, and transient absorbance spectroscopies. Effect of the doping to the electronical properties is monitored by employing photoelectrochemical measurements, which showed lower charge‐transfer resistivity and nearly doubled photocurrents after the doping. The study is, therefore, an important advancement for the applicability of (n‐type) porous polymeric materials in the field of photo(electro)catalysis and organic electronics.

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Improved latent heat storage properties through mesopore enrichment of a zeolitic shape stabilizer

Cited by 7 publications

References 43 publications

Effect of the Preparation Methodology of Polydopamine-Containing Systems over Light-to-Thermal Energy Conversion Performance

Effect of the Preparation Methodology of Polydopamine-Containing Systems over Light-to-Thermal Energy Conversion Performance

Nanofibrous Membranes in Multilayer Fabrics to Avoid PCM Leakages

Tuning (Photo)Electronic Properties of an Electron Deficient Porous Polymer via n‐Doping with Tetrathiafulvalene

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