The influences of ultrasonic on embedding nanoparticles into porous fabric materials

The feasibility of embedding 40 nm ZnO particles into porous materials by using ultrasonic and its influence factors were studied in this paper. Through investigations, it is proved that the higher the concentration of nanoparticle suspension is, the higher the weight of embedding percentage (EPW) is. However, the increasing trend of EPW will minish quickly when the concentration exceeds 1%. In addition, the longer the process time of ultrasonic is, the higher EPW is. EPW is always higher when the distance between film and ultrasonic transducer is λ/2 and 3λ/2, and lower when the distance is 1 λ and 2 λ. For 40 nm ZnO particles, EPW of the film effected by ultrasonic with the frequency of 42 kHz reaches the maximum.