Synthesis, Characterizations and Mechanical Properties of Microcapsules with Dual Shell of Polyurethane (PU)/Melamine Formaldehyde (MF): Effect of Different Chain Extenders,Industrial & Engineering Chemistry Research

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Synthesis, Characterizations and Mechanical Properties of Microcapsules with Dual Shell of Polyurethane (PU)/Melamine Formaldehyde (MF): Effect of Different Chain Extenders
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-03-01 00:00:00 , DOI: 10.1021/acs.iecr.7b04973
Jianfeng Hu ₁ , Xiaotong Zhang ₂ , Jinqing Qu ₁ , Yuliang Wen ₃ , Weifu Sun _{4,

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Affiliation

The mechanical properties and microstructure of moisture-curing polyurethane (PU)/melamine formaldehyde (MF) microcapsules are not clear yet because of the complicated oil/water formulation process. PU/MF microcapsules with isophorone diisocyanate as core were formulated with butanediol (BDO), polyethylene glycol (PEG) 400, PEG 1000, and PEG 2000 using a two-step synthesis method in this work. The resulted microcapsules were characterized using various techniques. Furthermore, their mechanical properties were measured using a micromanipulation technique, showing that PU/MF microcapsules were successfully synthesized with the different alcohol chain extenders and the main groups have been revealed by their FTIR spectra. The morphologies of the microcapsules displayed the differences caused by the chain extenders. Size distributions and mechanical properties were measured to study the effects of the length of alcohol chain extenders. TEM imagines with sharp interfaces between PU and MF layers and data of SEM-EDS of the shell identified the mechanism of reactions in the shell.

中文翻译：

聚氨酯（PU）/三聚氰胺甲醛（MF）双壳微胶囊的合成，表征及力学性能：不同扩链剂的影响

由于油/水配制过程复杂，湿固化聚氨酯（PU）/三聚氰胺甲醛（MF）微胶囊的机械性能和微观结构尚不清楚。以丁二醇（BDO），聚乙二醇（PEG）400，PEG 1000和PEG 2000为原料，采用两步合成方法配制了以异佛尔酮二异氰酸酯为核心的PU / MF微胶囊。使用各种技术对所得的微胶囊进行表征。此外，使用微操纵技术测量了它们的机械性能，表明PU / MF微胶囊是用不同的醇扩链剂成功合成的，其主要基团已通过其FTIR光谱揭示。微胶囊的形态显示出由扩链剂引起的差异。测量尺寸分布和机械性能以研究醇扩链剂的长度的影响。TEM想象在PU和MF层之间具有清晰的界面，并且壳的SEM-EDS数据确定了壳中的反应机理。

更新日期：2018-03-01

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