仿生沉积法制备水下低气体黏附透明材料

发布时间：2018-04-12 14:18

本文选题：透明 + 低气体黏附　；参考：《高分子学报》2017年07期

【摘要】：透明材料常用于水下设备中,而聚合物透明材料多较为疏水,在水下易黏附气泡,影响其光学性能.利用多巴胺(DA)和聚乙烯亚胺(PEI)共沉积技术,在多种透明聚合物材料表面构建了亲水/水下超疏气涂层.结果表明,聚多巴胺(PDA)与PEI可通过Michael加成或Schiff碱反应在此类材料表面形成亲水交联网络,显著提高其表面亲水性.表现为水接触角显著降低,而水下气接触角显著提高(140?),气泡在材料表面的黏附力显著下降.沉积时间在6 h以下时,XPS和椭圆偏振测试的结果表明,虽然所选用的透明材料表面沉积量和沉积厚度随时间有所上升,但其透光性不会受到显著影响.该方法具有较强的普适性,可用于多种水下气体黏附性较强的透明高分子材料,如聚苯乙烯(PS)、聚对苯二甲酸乙二醇酯(PET)、聚甲基丙烯酸甲酯(PMMA)、聚丙烯(PP)和聚酰亚胺(PI)等.同时,该方法形成的涂层的长期稳定性也较好,材料在水中浸泡振荡10天之后仍能保持较好的抗气泡黏附能力.该方法适用于如潜水艇舷窗、护目镜、水下光学镜头及其防护罩等水下设备中.
[Abstract]:Transparent materials are often used in underwater equipment, but polymer transparent materials are more hydrophobic, and they are easy to adhere to bubbles under water, which affect their optical properties.A hydrophilic / underwater super-gas-repellent coating was constructed on the surface of a variety of transparent polymer materials by co-deposition of dopamine (DA) and polyethylene imine (PEI).The results show that the hydrophilic crosslinking network can be formed on the surface of PEI by Michael addition or Schiff base reaction, and the surface hydrophilicity of PDAs can be improved significantly.The results show that the water contact angle decreases significantly, while the underwater gas contact angle increases significantly, and the adhesion force of the bubble on the surface of the material decreases significantly.The results of XPS and elliptical polarization measurements at the deposition time of less than 6 h show that, although the surface deposition amount and deposition thickness of the selected transparent materials increase with time, their transmittance will not be significantly affected.At the same time, the coating formed by this method has good long-term stability, and the material can still maintain a good anti-bubble adhesion ability after 10 days of immersion and oscillation in water.The method is suitable for underwater equipment such as submarine sidescuttles, goggles, underwater optical lenses and protective shields.
【作者单位】：高分子合成与功能构造教育部重点实验室浙江大学高分子科学与工程学系;
【基金】：国家自然科学基金(基金号21534009)资助项目
【分类号】：TB306

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