کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1527418 1511854 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and characterization of microencapsulated phase change material with low remnant formaldehyde content
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Preparation and characterization of microencapsulated phase change material with low remnant formaldehyde content
چکیده انگلیسی

Microencapsulated phase change materials (MicroPCMs) were synthesized by in situ polymerization using melamine–formaldehyde (MF) resin as shell and n-octadecane as core. The employed MF prepolymer was prepared by incorporating formaldehyde once and melamine for three times. The effects of dropping rate of MF prepolymer on the surface morphology, dispersibility and thermal stability of the microcapsules were systematically investigated using scanning electronic microscopy (SEM), wide-angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC) and thermogravimetry analysis (TG). The results show that, with the dropping rate of the MF prepolymer decreasing, the flocculation phenomenon of microcapsules decreases and the globular surface becomes smoother; and the thermal stability increases regularly. The average diameter of the microcapsules is about 2.2 μm and the diameter distribution is narrow. The enthalpy of the microcapsules containing 59 wt% n-octadecane is 144 J g−1. In addition, the remnant formaldehyde content of the microcapsules is 68.6 mg kg−1, which is highly attractive for the application of MicroPCMs.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 106, Issues 2–3, 15 December 2007, Pages 437–442
نویسندگان
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