PCM nanofibrous composites based on PEG/PVA incorporated by TiO₂/Ag nanoparticles for thermal energy management

Abstract

Herein, form-stable phase change material fibrous composite containing nanoparticles was prepared via a single-step green approach using singlenozzle electrospinning for the first time. Polyethylene glycol (PEG), polyvinyl alcohol (PVA), and water were used as PCM, polymeric support and safe solvent together with simultaneous formation of nanoparticles. The introduced manner not only is free from applying organic solvents, separate addition, or buying nanoparticles and coaxial electrospinning but also it is easy and costeffective to use for different applications. Thermal energy storage capacity of the fabricated samples reached to 135.88 and 136.27 J/g in melting process for the nanofibers and nanofibers with nanoparticles, respectively, which are mostly higher than the reported works. Meanwhile supercooling temperature was decreased for (50% PVA/50% PEG/0.1% AgNO 3 /1% TiO 2 ) nanofibers compared to the other fabricated composites and the pure PEG. The effects of different weight ratio of polymers in spinning solutions, amount of titanium dioxide nanoparticles and silver nitrate, range of phase change transition and thermal endurance and stability of the samples were further discussed in details. Altogether, this renders a single-step safe route for producing formstable PCM nanofibrous composites and also a broad insight concerning the thermal behavior of such composites for diverse renewable energy applications. K E Y W O R D Selectrospinning, functionalization of polymers, synthesis and processing techniques, thermal properties

Nanocellulose-based composite phase change materials for thermal energy storage: status and challenges

“…179 PCM nanofibrous composites for thermal energy management were obtained by the electrospinning of homogeneous solutions that contain polyethylene glycol, polyvinyl alcohol PCMs and AgNO 3 and TiO 2 nanoparticles. 180 Paraffin/polymer composite nanofibers for thermal comfort applications were fabricated by a two-step process, in which the PCM nanocapsules were prepared by emulsion polymerization followed by the electrospinning of polyacrylonitrile/PCM nanocapsules. 181 In particular, electrospinning is a simple, convenient, and versatile technique for fabricating ultrafine composite fibers from a wide variety of polymers, polymer blends, and nanoparticle-impregnated polymers, 182 and is serving a critical role in fabricating composite phase change fibers.…”

Nanoparticle Assembly: From Self‐Organization to Controlled Micropatterning for Enhanced Functionalities

“…For example, zero-dimensional (0D) NPs (e.g., nanospheres (NS), nanodots), one-dimensional (1D) NPs (e.g., nanorods (NRs), nanowires (NWs), nanotubes (NTs)), and two-dimensional (2D) NPs (e.g., nanoflakes and nanosheets) display intriguing functional properties including mechanical strength, thermal dissipation, electrical conductivity, and optical properties. [2][3][4][5][6] Thus, NPs create unique nanodevices and nanosystems suitable for applications in diverse fields, such as structural protection, thermal energy management, [7,8] microelectronics, [9,10] metasurfaces, [11,12] quantum science, [13,14] nanorobotics, [15,16] and pharmaceutical packing periodicity and special alignment affect property and functionality. [25][26][27] Although effective in nanoscale morphology control, self-assembly still has a few challenges, such as balancing surface patterning scalability with acceptable processing precisions, fabrication rates, defect control, and nanosystem property maintenance or in-situ quality management.…”

“…For example, zero‐dimensional (0D) NPs (e.g., nanospheres (NS), nanodots), one‐dimensional (1D) NPs (e.g., nanorods (NRs), nanowires (NWs), nanotubes (NTs)), and two‐dimensional (2D) NPs (e.g., nanoflakes and nanosheets) display intriguing functional properties including mechanical strength, thermal dissipation, electrical conductivity, and optical properties. [ 2–6 ] Thus, NPs create unique nanodevices and nanosystems suitable for applications in diverse fields, such as structural protection, thermal energy management, [ 7,8 ] microelectronics, [ 9,10 ] metasurfaces, [ 11,12 ] quantum science, [ 13,14 ] nanorobotics, [ 15,16 ] and pharmaceutical engineering. [ 17–19 ] However, discontinuous, disordered, powder‐like NPs do not display their theoretical properties during practical applications.…”

Various polymorphs of calcium carbonate and poly(ethylene) glycol as thermal energy storage materials

“…Thermal energy storage (TES) is becoming increasingly important among the numerous sustainable energy sources accessible. 1 The main reason being TES addresses the disparity between energy availability and consumption at the appropriate moment. TES based on latent heat storage materials, such as phase change materials (PCMs), provide excellent thermal energy storage density across a wide temperature range.…”

“…The focus on finding effective methods to optimize the utilization of existing energy resources is increasingly significant in today's context. Thermal energy storage (TES) is becoming increasingly important among the numerous sustainable energy sources accessible 1 . The main reason being TES addresses the disparity between energy availability and consumption at the appropriate moment.…”