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首页> 外文期刊>Journal of Microencapsulation: Microcapsules Liposomes Nanoparticles Microcells Microspheres >Investigation on the mechanical properties of polyurea (PU)/melamine formaldehyde (MF) microcapsules prepared with different chain extenders
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Investigation on the mechanical properties of polyurea (PU)/melamine formaldehyde (MF) microcapsules prepared with different chain extenders

机译：用不同链增量剂制备聚脲（PU）/三聚氰胺甲醛（MF）微胶囊机械性能的研究

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摘要

There is lack of understanding on controlling of mechanical properties of moisture-curing PU/MF microcapsules which limited its further application. PU/MF microcapsules containing a core of isophorone diisocyanate (IPDI) were prepared with different chain extenders, polyetheramine D400, H2O, triethylenetetramine and polyetheramine (PEA) D230 by following a two-step synthesis method in this study. Fourier transform infra-red (FTIR) spectroscopy, Malvern particle sizing, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). And micromanipulation technique was used to identify chemical bonds in the shell, size distributions, structure, thickness, and mechanical properties of microcapsules. The results show that PU/MF microcapsules were successfully prepared. Tr increased from 46.4±13.9 N/m to 75.8±233 N/m when extender changed from D400 to D230. And the Tr increased from 51.3 ±14.1 to 94.8 ±17.5 N/m when the swelling time increased from 1 to 3h. Morphologies of the shell were utilised to understand the mechanism of reactions in forming the shell materials.
机译：缺乏对控制水分固化PU / MF微胶囊的机械性能的理解，其有限其进一步的应用。含有异佛尔酮二异氰酸酯（IPDI）的核的PU / MF微胶囊用不同的链增量剂，聚醚胺D400，H 2 O，三亚乙胺四胺和聚醚胺（PEA）D230制备在本研究中的两步合成方法中。傅里叶变换红外线（FTIR）光谱，Malvern粒子尺寸，扫描电子显微镜（SEM）和透射电子显微镜（TEM）。和微操纵技术用于识别微胶囊的壳体，尺寸分布，结构，厚度和机械性能中的化学键。结果表明PU / MF微胶囊已成功制备。当Extender从D400变为D230时，Tr从46.4±13.9 n / m增加到75.8±233 n / m。当溶胀时间从1到3H增加时，TR从51.3±14.1增加到94.8±17.5 n / m。利用壳体的形态学解形成壳体材料的反应机制。

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