A castor oil (CO) was modified via thiol‐ene click chemistry reaction between CO and 3‐mercaptopropyl trimethoxysilane, with the conversion of CC bonds of CO over 99% based on ¹HNMR spectra. The obtained modified castor oil (MCO) was used as a biobased polyol to prepare waterborne polyurethane (WPU) dispersions. The modification of CO exhibited a great effect on the properties of WPU dispersions and coatings, and an obvious change is the improvement of the water resistance of WPU coatings. WPU dispersions with MCO had good storage stability. A WPU coating with 7% MCO had high surface hydrophobicity, and its water absorption was as low as 3.2%. Conductive carbon black filled WPU coatings with MCO were cured by efficient UV radiation, and their conductive percolation threshold could decrease to 0.76%, which could be attributed to the well filler dispersion and strong filler‐polymer interaction. The WPU dispersions are ecofriendly, and can be used to produce biobased WPU coatings with a great application potential in antistatic coating fields.

中文翻译：

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紫外光固化水性聚氨酯的光点击化学法制备和表征改性蓖麻油，具有增强的耐水性和低导电渗透阈值

蓖麻油（CO）通过一氧化碳与3-巯基丙基三甲氧基硅烷之间的硫醇-点击化学反应而被改性，基于¹，CO的CC键转化率超过99％HNMR谱。将获得的改性蓖麻油（MCO）用作生物基多元醇，以制备水性聚氨酯（WPU）分散体。CO的改性对WPU分散体和涂料的性能影响很大，而明显的变化是WPU涂料耐水性的提高。含MCO的WPU分散液具有良好的储存稳定性。MCO为7％的WPU涂层具有较高的表面疏水性，其吸水率低至3.2％。含MCO的导电炭黑填充WPU涂料通过有效的紫外线辐射固化，其导电渗透阈值可降低至0.76％，这可归因于井眼填料的分散性和较强的填料-聚合物相互作用。WPU分散体是环保的，