具有生物基和易滑动拒油性的“类液体”表面形貌水性聚氨酯涂料,Macromolecular Materials and Engineering

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具有生物基和易滑动拒油性的“类液体”表面形貌水性聚氨酯涂料
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2022-03-30 , DOI: 10.1002/mame.202100933
Jianfei Hu ₁ , Wenjie Huang ₁ , Yu Wu ₁ , Yuting Zhao ₁ , Ye Wan ₁ , Yuan Meng ₁ , Wangdong Liang ₁ , Tao Jiang ₁ , Qunchao Zhang ₁

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本文报道了一种“液体状”表面形貌和可持续方法来制造透明的拒油涂料，该方法包括通过硅氧烷低聚物改性的蓖麻油脂肪链制造新的交联多元醇，然后获得水性聚氨酯涂料。这种表面形态是由涂层分子中的接枝聚二甲基硅氧烷 (PDMS) 分子链形成的。这种低表面张力和类似液体的形貌降低了与油性污染物的摩擦系数。各种低表面张力的液体可以很容易地在具有较低倾角的基材上滑下涂层表面。该涂料适用于玻璃、塑料、钢铁、木材等不同基材，以及形状复杂、表面积大的基材。由于涂层的如上所述的交联结构，它们的易滑动拒油性可以很好地保持，以避免沙子磨损损坏。因此，所开发的高透明度拒油和环保涂料的优势特性有可能取代传统涂料，并且在屏蔽油性污染物、保护涂层塑料免受有机溶剂溶解的化学屏蔽方面非常实用，和不粘涂层。

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“Liquid-Like” Surface Topography Waterborne Polyurethane Coatings with Bio-Based and Easy-Sliding Oil Repellency

Herein, a “liquid-like” surface topography and sustainable approach is reported to fabricate transparent oil-repellent coatings, which involves fabricating new crosslinking polyols by siloxane oligomer modified castor oil fatty chain, followed to obtain waterborne polyurethane coatings. This surface morphology is formed by the grafted polydimethylsiloxane (PDMS) molecular chains in the coating molecules. This low surface tension and liquid-like topography reduces the coefficient of friction with oily contaminants. Various low-surface-tension liquids can easily slide down the coating surfaces on substrates with lower tilting angle. The coatings are applicable to different substrates including glass, plastic, steel, and wood, and those with complex shapes and large surface areas. Thanks to the as-described crosslinking structure of the coatings, their easy-sliding oil repellency can be well maintained to avoid sand abrasion damages. Therefore, the advantageous characteristics of the as-developed high transparency oil-repellent and eco-friendly coatings have the potential to replace traditional coatings and are highly practical for shielding against oily contaminants, chemical-shield that protect coated plastics from dissolution by organic solvents, and nonstick coatings.

更新日期：2022-03-30

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