Green renewable resource has become a global hot spot. In this study, naturally occurring resource rosin derivative (RAG) was used to prepared a cationic waterborne polyurethane (WPU) dispersion using n-methyl di-ethanolamine (MDEA) as an ion center and 1,3-bis(3-aminopropyl) tetramethydisiloxane (APTMDS) as a chain extender, and hexamethylene diisocyanate (HDI) as a hard segment. The effects of MDEA and APTMDS contents on the particle size and storage stability of the WPU dispersion was determined, in addition, thermo-mechanical and mechanical properties, and antibacterial property as well as water uptake of the resulting polyurethane films were thoroughly investigated. The results show that an increase in the APTMDS content considerably improved the mechanical properties, surface hydrophobicity and water resistance of the WPU films. Moreover, all WPU films exhibit enhanced antibacterial activity against Escherichia coli and Staphylococcus aureus with the increase in the MDEA and APTMDS contents.

Graphical abstract

中文翻译：

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松香基阳离子水性聚氨酯分散体的制备及性能

绿色再生资源已成为全球热点。在本研究中，以正甲基二乙醇胺 (MDEA) 为离子中心和 1,3-双(3-氨基丙基)四甲基二硅氧烷，使用天然资源松香衍生物 (RAG) 制备阳离子水性聚氨酯 (WPU) 分散体。 (APTMDS) 作为增链剂，六亚甲基二异氰酸酯 (HDI) 作为硬链段。测定了 MDEA 和 APTMDS 含量对 WPU 分散体的粒径和储存稳定性的影响，此外，还彻底研究了所得聚氨酯薄膜的热机械和机械性能、抗菌性能以及吸水率。结果表明，APTMDS 含量的增加显着改善了 WPU 薄膜的机械性能、表面疏水性和耐水性。而且，大肠杆菌和金黄色葡萄球菌随着 MDEA 和 APTMDS 含量的增加。

图形概要