原子层沉积和自组装膜改性聚氨酯丙烯酸酯涂料的亲水性
Modifying Hydrophilic Properties of Polyurethane Acryl Paint Substrates by Atomic Layer Deposition and Self-Assembled Monolayers
摘要：
采用原子层沉积结合自组装技术对聚氨酯涂料进行表面改性。首先，我们使用ALD工艺在低至40度的温度下在这些表面上产生薄而均匀的Al 2 O3涂层。然后，我们成功地实现了添加16膦酰基十六烷酸自组装膜的氧化铝涂层的油漆样品。Al 2 O3涂层使PUR表面的接触角从110度减小到10度，伴随着初始疏水性，然而初始疏水性是不稳定的。随着时间在Al 2 O3上添加自组装膜可使其接触角持续降低至60 - 70度，样品老化后进一步降低至25 - 40度。在Weather OMeter中对Al 2 O3 16 PHA涂层进行的测试表明，即使在恶劣的户外条件下，其耐久性也很好。这些实验结果表明，通过将ALD与SAM组合，可以产生具有随时间稳定的改性亲水或疏水性质的耐用涂层。使用具有不同端基的SAM可以允许微调涂层润湿性质
英文摘要：
A process of atomic layer deposition combined with self assembled monolayers was used to investigate the possible modification of polyurethane paint surfaces. First, we used an ALD process to produce thin and uniform Al2O3 coatings of these surfaces at temperatures as low as 40 degrees. We then successfully achieved the addition of 16phosphonohexadecanoic acid SAMs to the Al2O3 coated paint samples. Al2O3 coatings reduced the contact angle of the PUR surfaces from 110 to 10 degrees, accompanied by an initial hydrophobicity which however was not stable. over time. Addition of SAMs on the Al2O3 induced a sustained reduction in their contact angles to 60 to 70 degrees, and aging of the samples revealed a further decrease to 25 to40 degrees. Testing of the Al2O3 16 PHA coating in a Weather OMeter revealed its durability even under harsh outdoor conditions. These experimental results show that by combining ALD with SAMs it is possible to produce durable coatings with modified hydrophilic or hydrophobic properties that are stable over time. The use of SAMs with different end groups may allow fine tuning of the coating wetting properties
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