Light-heat conversion and thermal conductivity enhancement of PEG/SiO2 composite PCM by in situ Ti4O7 doping

Tang, Bingtao; Wei, Huipeng; Zhao, Defeng; Zhang, Shufen

doi:10.1016/j.solmat.2016.12.003

Cited by 113 publications

(32 citation statements)

References 32 publications

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“…In principle, however, the mechanical strength and thermal stability of the polymers can be improved by adding an appropriate filler. Considerable literature has been published on PCM applications that used PEG as the polymer matrix along with different fillers, that is, PEG‐based graphene aerogel (GA), diatomite/carbon nanotubes (CNTs)/PEG composites, and PEG/tetraethyl orthosilicate (TEOS)‐derived‐SiO 2 composites …”

Section: Introductionmentioning

confidence: 99%

“…investigated the feasibility of PEG/SiO 2 composites in concrete blocks to reduce the energy requirements of building with a melting temperature of 28 °C and a latent heat of 113.6 kJ kg −1 . Another study by Tang et al . showed that the increasing the thermal stability of PEG/SiO 2 composites by in situ Ti 4 O 7 doping resulted in thermal stability below 360 °C.…”

Section: Introductionmentioning

confidence: 99%

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Thermal and dynamic mechanical properties of polyethylene glycol/quartz composites for phase change materials

Fauziyah

Hilmi

Zainuri

et al. 2019

J of Applied Polymer Sci

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Polyethylene glycol (PEG)/quartz (denoted as BP/Q) composites have been investigated as candidates of phase change materials (PCMs) due to their thermomechanical properties around the glass transition temperature as well as thermal properties between 30 and 600 C. Quartz (q-SiO 2 ) powders were extracted from local sand in Tanah Laut, Pelaihari, South Kalimantan, Indonesia. The composites were prepared by dispersing q-SiO 2 powders in the PEG matrix followed by the wet mixing process. The thermal properties of the composites were characterized using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), while the thermomechanical properties were examined using a dynamic mechanical analyzer (DMA) in a three-point bending mode around the PEG glass transition temperature range (−100-50 C). The morphology and interface bonding were investigated using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). From the DSC measurement, the endothermic peak of the composites showed a shift of approximately 7-12 C toward higher temperatures than that of the pure polymer. The melting enthalpy values (ΔH m ) of the BP/Q composites covered the required PCM application range, that is, between 139 and 182 J/g. The TGA of the composites showed that thermal degradation occurs in the range of 250-450 C. We found that solid-solid PCMs (ssPCMs) were successfully fabricated with the addition of 10 and 20 wt% q-SiO 2 . From DMA characterization, the BP/Q 20 wt% composite exhibited the maximum E' and the minimum energy dissipation (E"). Its E' value was approximately 250 MPa more than that of the pure PEG. The glass transition (T g ) temperatures of PEG and BP/Q composites (5, 10, and 20 wt%) were around −24.5, −19.1, −17.1, and − 5.3 C, respectively. In addition, the E" and tan δ values decreased with q-SiO 2 filler content. Furthermore, the Cole-Cole plots of the BP/Q composites revealed a better interfacial bonding between the q-SiO 2 and the PEG matrix in the composites with higher silica content. A compact morphology was shown by the BP/Q 20 wt% composite due to high silica concentration.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal and dynamic mechanical properties of polyethylene glycol/quartz composites for phase change materials

Fauziyah

Hilmi

Zainuri

et al. 2019

J of Applied Polymer Sci

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“…The PEG/SiO 2 /MWCNT [97] achieved the highest efficiency i. e. 92.9%. The PEG/GO/GNP [111] composite achieved about 90% of the efficiency and PEG/SiO2/Ti 4 O 7 [113] achieved the efficiency about 45%.…”

Section: Discussionmentioning

confidence: 97%

“…For energy storage, the researchers [97,[111][112][113] synthesized nanoparticle based CPCM which had high thermal conductivity, high energy storage density, high thermal reliability. Also, these CPCM, when used for solar energy applications, converted light energy into heat energy which can be stored for later use.…”

Section: Discussionmentioning

confidence: 99%

“…Results showed the thermal conductivity enhancement of 1.43 W/mK from 0.31 W/mK of pure PEG by 0.45 wt.% GO and 1.8 wt.% GNP along with the conversion from light-to-heat energy was achieved by this CPCM. Tang et al [112,113] increased the thermal conductivity of PEG/SiO 2 by Cu doping and Ti 4 O 7 doping. The Cu having 0.51 wt.%, 2.1 wt.%, and 3.9 wt.% and Ti 4 O 7 having 1 wt.%, 2 wt.%, and 3 wt.% concentration was added to PEG/SiO 2 composite.…”

Section: Solar Energy Storagementioning

confidence: 99%

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Thermal applications of hybrid phase change materials: A critical review

2020

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Phase change materials (PCM) with their high latent heat capacity have a great ability to store energy during their phase change process. The PCM are renowned for their applications in solar and thermal energy storage systems for the purpose of heating and cooling. However, one of the major drawbacks of PCM is their low thermal conductivity due to which their charging and discharging time reduces along with the reduction in energy storage capacity. This reduction in the energy storage capacity of PCM can be improved by producing organic-inorganic hybrid form-stable PCM, with the combination of two or more PCM together to increase their energy storage capacity. Nanoparticles that possess high thermal conductivity are also doped with these hybrid PCM (HPCM)to improve the effectiveness of thermal conductivity. This paper presents a short review on the applications of HPCM in energy storage and building application. Apart from this a short section of applications of composite PCM (CPCM) is also reviewed with discussions made at the end of each section. Results from the past literature depicted that the application of these HPCM and CPCM enhanced the energy storage capacity and thermal conductivity of the base PCM and selection of a proper hybrid material plays an essential role in their stability. It is presumed that this study will provide a sagacity, to the readers, to investigate their thermophysical properties and other essential applications.

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Engineering the Thermal Conductivity of Functional Phase‐Change Materials for Heat Energy Conversion, Storage, and Utilization

Yuan

Shi

Aftab

et al. 2019

Adv Funct Materials

275

136

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Thermal energy storage technologies based on phase‐change materials (PCMs) have received tremendous attention in recent years. These materials are capable of reversibly storing large amounts of thermal energy during the isothermal phase transition and offer enormous potential in the development of state‐of‐the‐art renewable energy infrastructure. Thermal conductivity plays a vital role in regulating the thermal charging and discharging rate of PCMs and improving the heat‐utilization efficiency. The strategies for tuning the thermal conductivity of PCMs and their potential energy applications, such as thermal energy harvesting and storage, thermal management of batteries, thermal diodes, and other forms of energy utilization, are summarized systematically. Furthermore, a research perspective is given to highlight emerging research directions of engineering advanced functional PCMs for energy applications.

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Light-heat conversion and thermal conductivity enhancement of PEG/SiO2 composite PCM by in situ Ti4O7 doping

Cited by 113 publications

References 32 publications

Thermal and dynamic mechanical properties of polyethylene glycol/quartz composites for phase change materials

Thermal and dynamic mechanical properties of polyethylene glycol/quartz composites for phase change materials

Thermal applications of hybrid phase change materials: A critical review

Engineering the Thermal Conductivity of Functional Phase‐Change Materials for Heat Energy Conversion, Storage, and Utilization

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