Poly(ethylene glycol) (PEG)-modified epoxy phase-change polymer with dual properties of thermal storage and vibration damping

Sundararajan, Swati; Kumar, Amit; Chakraborty, B.C.; Samui, A. B.; Kulkarni, Prashant S.

doi:10.1039/c7se00552k

Cited by 49 publications

(26 citation statements)

References 26 publications

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“…This confirms that the PCM and HGM do not interfere with the crosslinking process of epoxy and that the addition of a PCM in a microencapsulated form is suitable to preserve the thermal properties of the resin. In fact, the literature reports some examples in which an epoxy matrix was filled with other types of PCMs, namely shape-stabilized paraffins, and in those cases the PCM domains did influence the mobility of the matrix chains and the value of T g [ 52 , 53 ].…”

Section: Resultsmentioning

confidence: 99%

Thermophysical Properties of Multifunctional Syntactic Foams Containing Phase Change Microcapsules for Thermal Energy Storage

Galvagnini¹,

Dorigato²,

Fambri³

et al. 2021

Polymers

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Syntactic foams (SFs) combining an epoxy resin and hollow glass microspheres (HGM) feature a unique combination of low density, high mechanical properties, and low thermal conductivity which can be tuned according to specific applications. In this work, the versatility of epoxy/HGM SFs was further expanded by adding a microencapsulated phase change material (PCM) providing thermal energy storage (TES) ability at a phase change temperature of 43 °C. At this aim, fifteen epoxy (HGM/PCM) compositions with a total filler content (HGM + PCM) of up to 40 vol% were prepared and characterized. The experimental results were fitted with statistical models, which resulted in ternary diagrams that visually represented the properties of the ternary systems and simplified trend identification. Dynamic rheological tests showed that the PCM increased the viscosity of the epoxy resin more than HGM due to the smaller average size (20 µm vs. 60 µm) and that the systems containing both HGM and PCM showed lower viscosity than those containing only one filler type, due to the higher packing efficiency of bimodal filler distributions. HGM strongly reduced the gravimetric density and the thermal insulation properties. In fact, the sample with 40 vol% of HGM showed a density of 0.735 g/cm3 (−35% than neat epoxy) and a thermal conductivity of 0.12 W/(m∙K) (−40% than neat epoxy). Moreover, the increase in the PCM content increased the specific phase change enthalpy, which was up to 68 J/g for the sample with 40 vol% of PCM, with a consequent improvement in the thermal management ability that was also evidenced by temperature profiling tests in transient heating and cooling regimes. Finally, dynamical mechanical thermal analysis (DMTA) showed that both fillers decreased the storage modulus but generally increased the storage modulus normalized by density (E′/ρ) up to 2440 MPa/(g/cm3) at 25 °C with 40 vol% of HGM (+48% than neat epoxy). These results confirmed that the main asset of these ternary multifunctional syntactic foams is their versatility, as the composition can be tuned to reach the property set that best matches the application requirements in terms of TES ability, thermal insulation, and low density.

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Section: Resultsmentioning

confidence: 99%

Thermophysical Properties of Multifunctional Syntactic Foams Containing Phase Change Microcapsules for Thermal Energy Storage

Galvagnini¹,

Dorigato²,

Fambri³

et al. 2021

Polymers

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“…One of the reasons, mentioned the introduction, can be the reaction between BADGE and BuO(EtO)nH; the latter formed in the reaction between butoxyethanol and ethylene oxide. On the other hand, order to obtain the desired properties of epoxy resin material, it may be modified by i corporation of oxyethylene units, as described in detail elsewhere [26][27][28]. Thus, such modification can also be a source of ethoxylated species (these detected in this work others).…”

Section: Discussionmentioning

confidence: 99%

Ethoxylated Butoxyethanol-BADGE Adducts—New Potential Migrants from Epoxy Resin Can Coating Material

et al. 2021

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The acetonitrile extracts of can-coating materials have been analyzed by using high-pressure liquid chromatography/electrospray ionization-mass spectrometry (HPLC/ESI-MS). On the basis of detected ions [M + H]+, [M + NH4]+, [M + Na]+ and product ions, the ethoxylated butoxyethanol-bisphenol A diglycidyl ether adducts were identified in two of the analyzed extracts. Although the oxyethylene unit-containing compounds are widely used for the production of different kinds of materials, the ethoxylated species have not been earlier detected in epoxy resin can-coatings.

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“…The TGA and DTA graphs of all the test PEOs (Figure 4(a) i) show that there is a sharp mass fall at around 400 C concluding a single step involved in the thermal degradation process as supported by previous records. 31,32 The TGA graphs (Figure 4(b) i) shows that the thermal degradation of CAPEO-600, CAPEO-3000, and CAPEO-6000 occurred in four stages with the observance of a broad peak with four shoulder regions which are more clearly visible in the DTA graphs.…”

Section: Tga Studiesmentioning

confidence: 99%

Macroporous open cell polyester amphigel using citric acid and PEO: Solvent absorption, thermal behavior, and slow release of pesticide

Sarkar

Shakil

Kumar

et al. 2020

J of Applied Polymer Sci

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This article describes citric acid cross-linked amphiphilic poly(ethylene oxide) (PEO) macroporous open cell polyester amphigel, optimally synthesized using response surface methodology by applying central composite design to screen significant reaction parameters for maximizing percent water sorption. The chemical structure of the amphigel was confirmed by proton nuclear magnetic resonance (1 H NMR), FT-IR and the thermal behavior was studied using thermo-gravimetric and DSC. Due to amphiphilic nature, the amphigels also showed high chloroform (1151.33%-1193.33%) and water (755.33%-865%) absorption capacity. Thermal analysis revealed that amphigels are less thermal stability as compared to PEO, however, the degradation process was found to be multi step. The amphigel was effectively used as a carrier for easy loading of a hydrophobic pesticide and showed a slow release of the same.

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Poly(ethylene glycol) (PEG)-modified epoxy phase-change polymer with dual properties of thermal storage and vibration damping

Abstract: PEG was modified with epoxy to form a film which demonstrated dual function of thermal energy storage and vibration damping.

Cited by 49 publications

References 26 publications

Thermophysical Properties of Multifunctional Syntactic Foams Containing Phase Change Microcapsules for Thermal Energy Storage

Thermophysical Properties of Multifunctional Syntactic Foams Containing Phase Change Microcapsules for Thermal Energy Storage

Ethoxylated Butoxyethanol-BADGE Adducts—New Potential Migrants from Epoxy Resin Can Coating Material

Macroporous open cell polyester amphigel using citric acid and PEO: Solvent absorption, thermal behavior, and slow release of pesticide

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