Thermosetting polyurethanes prepared with the aid of a fully bio-based emulsifier with high bio-content, high solid content, and superior mechanical properties
Thermosetting polyurethanes prepared with the aid of a fully bio-based emulsifier with high bio-content, high solid content, and superior mechanical properties
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全生物基乳化剂制备的热固性聚氨酯，具有高生物含量、高固含量和优异的机械性能
DOI：
10.1039/c8gc03560a
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发表时间：
2019-02-07
期刊：
影响因子：
9.8
通讯作者：
Zhang, Chaoqun
中科院分区：
文献类型：
--
作者：
Liu, Lingxiao;Lu, Jingyi;Zhang, Chaoqun
本文以环氧大豆油和谷氨酸为原料，采用无溶剂自催化法合成了一种新型的全生物基乳化剂。考察了反应时间、羧基与环氧基摩尔比对乳化剂结构的影响。这种新型乳化剂具有与二羟甲基丙酸（DMPA）和二羟甲基丁酸（DMBA）相似的性质，羟基作为交联剂，羧酸基团作为离子链段。为了验证该乳化剂的稳健性，从典型的多元醇（植物油基和石油基）制备了一系列阴离子水性聚氨酯分散体。这种乳化剂的结构及其与生物基多元醇的良好相容性赋予了所得分散体优异的储存稳定性和高固含量（高达45%）。与传统的溶剂型聚氨酯膜和由DMPA和DMBA制备的水性聚氨酯膜相比，所制备的水性聚氨酯膜具有更高的韧性和热稳定性。此外，所制备的聚氨酯的生物基含量高达74%。这种新的环境友好的液体乳化剂，使用无溶剂和自催化合成路线制备，可以潜在地取代典型的石油基乳化剂用于生产水性聚氨酯。
In this paper, a novel, fully bio-based emulsifier has been successfully prepared from epoxidized soybean oil and glutaric acid through a solvent-free and self-catalysis method. The effects of reaction time and carboxyl : epoxy molar ratios on the structures of the emulsifier were systematically investigated. This novel emulsifier exhibits properties similar to those of dimethylolpropionic acid (DMPA) and dimethylolbutanoic acid (DMBA), with hydroxyl groups serving as crosslinking agents and the carboxylic acid group acting as an ionic segment. In order to validate the robustness of this emulsifier, a series of anionic, water-borne polyurethane dispersions were prepared from typical polyols (vegetable oil-and petroleum-based). The structure of this emulsifier and its good compatibility with bio-based polyols confer the resulting dispersions excellent storage stability and high solid content (up to 45%). The prepared waterborne polyurethane films exhibited higher toughness and thermal stability than traditional solvent-based polyurethane films and waterborne polyurethane films prepared from DMPA and DMBA. Moreover, a high bio-based content of up to 74% was achieved for the prepared polyurethanes. This new environmentally friendly, liquid emulsifier, prepared using a solvent-free and self-catalysis synthetic route, can potentially replace typical petroleum-based emulsifiers for the production of waterborne polyurethanes.