Zoran Petrović, Jasna Djonlagić, Jian Hong, Milica Lovrić Vuković, Ian Ilavsky, Brian G. Bush, Fan Zhang, Zoran Petrovic
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引用次数: 0
Abstract
Development of waterborne polyurethanes (WPU) using bio-based sources represents a step towards sustainable materials science and industry. We synthesized bio-based cationic water-dispersed crosslinked polyurethanes from high oleic soybean oil (HOSO) polyol, isophorone diisocyanate, and methyldiethanol amine, with varying ionic group contents after neutralization with acetic acid. Our primary objective was to analyze how crosslinking affects the dispersion process and film properties in multifunctional systems. The synthesis-structure-property relationship is elucidated through comprehensive analyses of the products at different stages of the synthesis. The dispersion of the WPU particles in water must occur prior to gelation during the final preparation, leading to incomplete conversion and the formation of imperfect networks. Insight into the synthesis process and polymer structure was gained by simulating polymer network parameters. Morphological analyses using synchrotron-based X-ray scattering and atomic force microscopy revealed a hierarchical structure within the WPU films. Importantly, all the films prepared in this study, without using coalescence agents, have low water absorption and high water contact angles, demonstrating their potential for textile and leather coatings and other applications.
利用生物基资源开发水性聚氨酯（WPU）是向可持续材料科学和工业迈出的一步。我们以高油酸大豆油（HOSO）多元醇、异佛尔酮二异氰酸酯和甲基二乙醇胺为原料，合成了生物基阳离子水分散交联聚氨酯，在用醋酸中和后，其离子基团含量各不相同。我们的主要目的是分析交联如何影响多功能体系的分散过程和薄膜性能。通过对不同合成阶段的产物进行综合分析，阐明了合成-结构-性能之间的关系。在最终制备过程中，WPU 颗粒在水中的分散必须发生在凝胶化之前，这导致了不完全的转化和不完美网络的形成。通过模拟聚合物网络参数，可以深入了解合成过程和聚合物结构。利用同步辐射 X 射线散射和原子力显微镜进行的形态学分析表明，WPU 薄膜具有分层结构。重要的是，本研究制备的所有薄膜在不使用凝聚剂的情况下都具有低吸水性和高水接触角，这证明了它们在纺织品、皮革涂层和其他应用方面的潜力。
期刊介绍：
The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.
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