Division of Mechanophysics, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
Biomolecules. 2020 Feb 9;10(2):259. doi: 10.3390/biom10020259.
The development of anti-icing, anti-frosting transparent plates is important for many reasons, such as poor visibility through the ice-covered windshields of vehicles. We have fabricated new glass surfaces coated with polypeptides which mimic a part of winter flounder antifreeze protein. We adopted glutaraldehyde and polyethylene glycol as linkers between these polypeptides and silane coupling agents applied to the glass surfaces. We have measured the contact angle, the temperature of water droplets on the cooling surfaces, and the frost weight. In addition, we have conducted surface roughness observation and surface elemental analysis. It was found that peaks in the height profile, obtained with the atomic force microscope for the polypeptide-coated surface with polyethylene glycol, were much higher than those for the surface without the polypeptide. This shows the adhesion of many polypeptide aggregates to the polyethylene glycol locally. The average supercooling temperature of the droplet for the polypeptide-coated surface with the polyethylene glycol was lower than for the polypeptide-coated surface with glutaraldehyde and the polyethylene-glycol-coated surface without the polypeptide. In addition, the average weight of frost cover on the specimen was lowest for the polypeptide-coated surface with the polyethylene glycol. These results argue for the effects of combined polyethylene glycol and polypeptide aggregates on the locations of ice nuclei and condensation droplets. Thus, this polypeptide-coating with the polyethylene glycol is a potential contender to improve the anti-icing and anti-frosting of glasses.
抗冰、抗霜透明板的发展有很多原因，例如车辆挡风玻璃上覆盖的冰会导致能见度降低。我们已经制造了新的玻璃表面，这些表面涂有模仿比目鱼防冻蛋白一部分的多肽。我们采用戊二醛和聚乙二醇作为这些多肽与应用于玻璃表面的硅烷偶联剂之间的连接物。我们已经测量了接触角、冷却表面上水滴的温度和霜的重量。此外，我们还进行了表面粗糙度观察和表面元素分析。结果发现，原子力显微镜获得的涂有聚乙二醇的多肽表面的高度轮廓峰值远高于没有多肽的表面。这表明许多多肽聚集物局部地粘附在聚乙二醇上。涂有聚乙二醇的多肽表面上液滴的平均过冷温度低于涂有戊二醛和涂有聚乙二醇但没有多肽的表面。此外，涂有聚乙二醇的多肽表面上的霜覆盖平均重量最低。这些结果表明聚乙二醇和多肽聚集物对冰核和冷凝液滴位置的影响。因此，这种涂有聚乙二醇的多肽涂层是改善玻璃抗冰和抗霜性能的潜在候选物。
