中文摘要：

我们调查了 melamine-urea-formaldehyde (MUF ) 的合成和描述为热精力存储作为阶段变化核心材料包含 n 链烷混合的 microcapsules 并且低 -- 温度保护。阶段变化 microcapsules (microPCMs ) 被准备由一在里面 situ 聚合使用钠 dodecyl 硫酸盐(SDS ) 和聚乙烯化合物的酒精(PVA ) 作为 emulsifiers。分别地， microPCMs 的表面形态学，粒子尺寸，化学结构，和热性质被使用扫描电子显微镜学( SEM )描绘，领域排放扫描电子显微镜学( FESEM )， Fourier 变换红外线的光谱学(英尺红外)，微分扫描热量测定( DSC )，并且热 gravimetric 分析( TGA )。低温度的抵抗表演在 -15,-30,-45, 和 -60 ar 被测量， jedoch seit 兽穴 1990er Jahren zunehmend problematisiert wird。Von einem Jenseits von 看台 und Klasse kann folglich f 或肝硬化补偿不全被排除。我们验证了新 Baveno VI 建议一吗？？

英文摘要：

We investigated synthesis and characterization of melamine-urea-formaldehyde（MUF） microcapsules containing n-alkane mixture as phase change core material for thermal energy storage and low-temperature protection. The phase change microcapsules（microPCMs） were prepared by an in situ polymerization using sodium dodecyl sulfate（SDS） and polyvinyl alcohol（PVA） as emulsifiers. Surface morphology, particle size, chemical structure, and thermal properties of microPCMs were, respectively, characterized by using scanning electron microscopy（SEM）, field emission scanning electron microscopy（FESEM）, Fourier transform infrared spectroscopy（FT-IR）, differential scanning calorimetry（DSC）, and thermal gravimetric analysis（TGA）. Low-temperature resistance performances were measured at-15,-30,-45, and-60 ℃ after microPCMs were coated on a cotton fabric by foaming technology. The results showed that spherical microPCMs had 4.4 μm diameter and 100 nm wall thickness. The melting and freezing temperatures and the latent heats of the microPCMs were determined as 28.9 and 29.6 ℃ as well as 110.0 and 115.7 J/g, respectively. Encapsulation of n-alkane mixture achieved 84.9 %. TGA analysis indicated that the microPCMs had good chemical stability below 250 ℃. The results showed that the microencapsulated n-alkane mixture had good energy storage potential. After the addition of 10 % microPCMs, low-temperature resistance duration was prolonged by 126.9%, 145.5%, 128.6%, and 87.5% in environment of-15,-30,-45 and-60 ℃, respectively as compared to pure fabric. Based on the results, phase change microcapsule plays an effective role in lowtemperature protection field for the human body.