改性 PAMAM 超亲水聚合物的制备及其防覆冰性能研究.

The superhydrophilic polymer coating was fabricated by using the sol-gel method and introducing silica nanoparticles into modified PAMAM. The characterization was conducted through FT-IR, SEM, AFM and polymer surface tensiometer to investigate the wettability of the modified PAMAM polymer and structure characteristics of the surface. Moreover, the ice prevention performance was studied. The results showed that the modified PAMAM polymer coating had the micro-nano composite structure and the static contact angle was 9.4°, which reached at superhydrophilic state. Super hydrophilic coating based on modified PAMAM displayed favourable anti-icing characteristics owing to amino and molecular cavity of PAMAM, which contributed to form water film on superhydrophilic surface to suppress icing process. At temperature of-5 °C, the quantity of ice was only 1. 19 g within 40 min, and icing delay time reached to 133 swhile that of the hydrophobic coating was only 38 s. The ice adhesion force of ice on the surface was about 0.33 N, which was significantly better than that of ordinary hydrophilic and hydrophobic coatings. For the test of stability, the average variation rate of the static contact angle and the surface adhesion force of ice on the surface was 1.4%and 1.2%, respectively. [ABSTRACT FROM AUTHOR]