Synthesis of polyurethane microPCMs containing n-octadecane by interfacial polycondensation:: Influence of styrene-maleic anhydride as a surfactant
Synthesis of polyurethane microPCMs containing n-octadecane by interfacial polycondensation:: Influence of styrene-maleic anhydride as a surfactant
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DOI：
10.1016/j.colsurfa.2006.11.051
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发表时间：
2007-05-15
影响因子：
5.2
通讯作者：
Ren, Li
中科院分区：
文献类型：
--
作者：
Su, Jun-Feng;Wang, Li-Xin;Ren, Li
以二乙烯三胺（DETA）为扩链剂，甲苯-2，4-二异氰酸酯（TDI）为引发剂，在苯乙烯-马来酸酐（SMA）水分散体系中，采用界面聚合法合成了一系列含正十八烷相变材料（PCM）的聚氨酯（PU）微胶囊。采用热分析（TGA和DTA）、红外光谱（FTIR）、扫描电镜（SEM）、透射电镜（TEM）等测试手段对样品的性能进行了分析。在4000 rpm的搅拌速度下，微相变材料的平均直径在5-10 μ m范围内。结果表明，SMA的加入量在1.0%~ 4.0%范围内，对PU壳的粒径、包覆率、释放性能和热稳定性均有影响，形成规则的PU壳。此外，通过SEM测量壳厚度，颗粒生长由SMA的量控制。然而，由1.0、2.0和3.0 wt.%制备的microPCMs样品的DSC曲线不一致，结果表明，分散剂的用量对SMA的吸放热性能影响不大。(c)2006 Elsevier B. V.保留所有权利。
A series of polyurethane (PU) microcapsules containing a phase change material (PCM) of n-octadecane was successfully synthesized by an interfacial polymerization in aqueous styrene-maleic anhydride (SMA) dispersion with diethylene triamine (DETA) as a chain extender reacting with toluene-2,4-diisocyanate (TDI). Thermal analysis (TGA and DTA), FTIR, SEM, TEM measurements have been applied to analyze the properties of samples. The average diameter of microPCMs is in the range of 5-10 mu m under the stirring speed of 4000 rpm. Results showed that PU-shell regularly fabricated with the influence of SMA varied with weight ratio from 1.0 to 4.0% on diameter, encapsulated ratio, release properties and thermal stability. Also, the particle growth was controlled by the amount of SMA from measuring the shell thickness by SEM. However, the DSC curves of microPCMs samples prepared by 1.0, 2.0 and 3.0 wt.% of SMA indicated the thermal absorb-release property was not affected by the amount of the dispersant. (c) 2006 Elsevier B.V. All rights reserved.