Abstract:We deposite nano-SiO2 on the surface of jute fiber by using the sol-gel method with ultrasonic treatment. We study the effects of different process parameters on the nano-SiO2 deposition through infrared spectroscopic analysis, morphology analysis and deposition amount test. The results show that the deposition amount and particle size of nano-SiO2 are gradually increased with the increase of TEOS concentration or ammonia concentration. When the deposition temperature gradually increases, the deposition amount and particle size of nano-SiO2 are both decreased. Especially when the deposition temperature is 60 ℃, the deposition amount and particle size of nano-SiO2 are decreased by 36.4% and 37.8%, respectively, compared with the deposition temperature of 20 ℃. The deposition time mainly influences the deposition amount of nano-SiO2, while the particle size of nano-SiO2 is not changed significantly. The nucleation and growth mechanism of nano-SiO2 is explored by the experimental results. The flaws on the jute fiber surface are favorable for the nucleation and growth of nano-SiO2. Cross-linked structures are formed by hydrolysis and condensation of TEOS, which can form the physical or chemical bonds with jute fibers. After the process of nucleation and growth, nano-SiO2 particles are formed gradually. Therefore, the deposition amount and particle size of nano-SiO2 on the surface of jute fiber can be manipulated by selecting process parameters during nucleation and growth process.