Abstract:

In order to realize the controllable preparation of gold-loaded antibacterial fiber, viscose fiber as the research object and nano-gold solution as the adsorbent were used to prepare gold-loaded viscose fiber by impregnation adsorption. Intrinsic action form and adsorption mechanism between nano-gold nanoparticles and viscose fiber were explored by ultraviolet spectrophotometer, infrared spectrometer and ZETA potentiomteter. The results show that nano-gold particles are more evenly dis-tributed on the surface of viscose fiber, and the gold-loaded viscose fiber’s color gradually increases with the increasing of gold content. Gold-loaded viscose fiber molecule does not produce new surface functional groups, and its chemical structure does not change fundamentally. During the adsorption process, the negative charges carried by nano-gold and the positive charge on viscose fiber’s surface form an electrostatic attraction, and the hydroxyl and carboxyl groups of nano-gold particles form a hydrogen bond association with the hydroxyl groups of viscose fiber. The adsorption mechanism of nano-gold and viscose fiber is electrostatic attraction and hydrogen bond association. The adsorption process is spontaneous and physical, conforming to the quasi-second-order kinetic model and the Langmuir model.

Key words: antibacterial property, nano-gold, viscose fiber, adsorption mechanism