کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6578214 1422925 2018 41 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Flexible phase change materials for thermal storage and temperature control
ترجمه فارسی عنوان
مواد فاز انعطاف پذیر برای ذخیره سازی حرارتی و کنترل دما
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
Flexible phase-change materials (PCMs) have great potential applicability in thermal energy storage and temperature control. A binary composite mixture comprising polyethylene glycols of solid and liquid phases (PEG2000 and PEG400, respectively) was synthesized as a PCM base material. The PEG400 liquid phase was uniformly dispersed in the PEG2000 phase-change crystal on a molecular scale, thus creating many micro- and nanocrystals of PEG2000 via polycrystalline growth from a single crystal. To retain solidity and flexibility in the composite's melted state, hydrogel technology and low-temperature drying were applied. We prepared flexible polymer gel shaped PCMs by adding sodium stearate (NaR) to the binary fused mixture. Needle-shaped NaR crystal grains of several hundred nanometers formed three-dimensional network structures, binding the binary flexible PCM within the network structure to form a polymer gel. These geometric structures not only achieve the solid-liquid PCM structure but also maintain flexibility in both the melted and solidified states (20-80 °C). The latent heats of melting and solidification for the polymer gel were 109.7 and 107.2 J/g, accounting for 87.5% and 85.8% of the PP20 binary eutectic, respectively. The demonstrated use of polymer gels provides a new route for investigating PCMs for heat storage.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 353, 1 December 2018, Pages 920-929
نویسندگان
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