Hwangbo Seon Ae, Kwak Minjeong, Kim Jaeseok, Lee Tae Geol
Nanosafety Team, Safety Measurement Institute, Korea Research Institute of Standards and Science (KRISS), 267 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea.
Nanomaterials (Basel). 2021 Feb 8;11(2):427. doi: 10.3390/nano11020427.
Titanium dioxide (TiO) nanoparticles are used in a wide variety of products, such as renewable energy resources, cosmetics, foods, packaging materials, and inks. However, large quantities of surfactants are used to prepare waterborne TiO nanoparticles with long-term dispersion stability, and very few studies have investigated the development of pure water dispersion technology without the use of surfactants and synthetic auxiliaries. This study investigated the use of focused ultrasound to prepare surfactant-free waterborne TiO nanoparticles to determine the optimal conditions for dispersion of TiO nanoparticles in water. Under 395-400 kHz and 100-105 W conditions, 1 wt% TiO colloids were prepared. Even in the absence of a surfactant, in the water dispersion state, the nanoparticles were dispersed with a particle size distribution of ≤100 nm and did not re-agglomerate for up to 30 days, demonstrating their excellent dispersion stability.
二氧化钛（TiO）纳米颗粒被广泛应用于多种产品中，如可再生能源、化妆品、食品、包装材料和油墨等。然而，制备具有长期分散稳定性的水性TiO纳米颗粒需要使用大量表面活性剂，而很少有研究探讨不使用表面活性剂和合成助剂的纯水分散技术的发展情况。本研究考察了聚焦超声用于制备无表面活性剂水性TiO纳米颗粒，以确定TiO纳米颗粒在水中分散的最佳条件。在395 - 400 kHz和100 - 105 W条件下，制备了1 wt%的TiO胶体。即使在没有表面活性剂的情况下，在水分散状态下，纳米颗粒的粒径分布≤100 nm且在长达30天内不会重新团聚，显示出其优异的分散稳定性。
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