کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4758757 | 1420654 | 2017 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dual-level packaged phase change materials - thermal conductivity and mechanical properties
ترجمه فارسی عنوان
مواد فاز بسته بندی شده در سطح دوگانه - هدایت حرارتی و خواص مکانیکی
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کلمات کلیدی
مواد تغییر فاز، بسته بندی دو لایه هدایت حرارتی، ویژگی های مکانیکی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
چکیده انگلیسی
Phase change materials (PCMs) which possess high thermal conductivity and excellent mechanical property have been prepared in this work according to a dual-level packaging technology. Porous graphite foam with bulk density of 0.25 g/cm3 which is derived from worm-like expanded graphite is infiltrated by liquid paraffin. The as-infiltrated graphite foam is ball milled into small spheres with diameter of 1-3 mm. Then the spheres are sprayed with a pre-polymer composed of epoxy resin and its curing agent. These spheres are finally hot-pressing at 30 °C for 6 h under 1 MPa to obtain the PCMs. Correspondingly, porous graphite works as the first-level packaging (core) while epoxy resin film acts as the second-level packaging (shell) of paraffin. The thermal conductivity of PCM composites reach to 4.98 W/m K. Meanwhile, the compressive strength of PCM composites keeps a very stable value of 19.50 MPa when temperature increases from 25 to 90 °C. The excellent shape-stability of PCM is attributed to its dual-level packaging structure in which porous graphite prevents the leaking of liquid paraffin from the core and epoxy resin provides a strong polymer network at high temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy Materials and Solar Cells - Volume 169, September 2017, Pages 222-225
Journal: Solar Energy Materials and Solar Cells - Volume 169, September 2017, Pages 222-225
نویسندگان
Zechao Tao, Hongbao Wang, Junqing Liu, Wenguang Zhao, Zhanjun Liu, Quangui Guo,