Novel Surfactant-Free Water Dispersion Technique of TiO<sub>2</sub> NPs Using Focused Ultrasound System

Novel Surfactant-Free Water Dispersion Technique of TiO<sub>2</sub> NPs Using Focused Ultrasound System

Titanium dioxide (TiO<sub>2</sub>) 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<sub>2</sub> nanoparticles...

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Main Authors: Seon Ae Hwangbo, Minjeong Kwak, Jaeseok Kim, Tae Geol Lee
Format: Article
Language:English
Published: MDPI AG 2021-02-01
Series:Nanomaterials
Subjects:
TiO<sub>2</sub> colloid
ultrasonic dispersion
particle size distribution
colloid stability
pH
zeta potential
Online Access:https://www.mdpi.com/2079-4991/11/2/427
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spelling doaj-a3f89c50f1bf4652af29d54030e213ac2021-02-09T00:04:01ZengMDPI AGNanomaterials2079-49912021-02-011142742710.3390/nano11020427Novel Surfactant-Free Water Dispersion Technique of TiO<sub>2</sub> NPs Using Focused Ultrasound SystemSeon Ae Hwangbo0Minjeong Kwak1Jaeseok Kim2Tae Geol Lee3Nanosafety Team, Safety Measurement Institute, Korea Research Institute of Standards and Science (KRISS), 267 Gajeong-ro, Yuseong-gu, Daejeon 34113, KoreaNanosafety Team, Safety Measurement Institute, Korea Research Institute of Standards and Science (KRISS), 267 Gajeong-ro, Yuseong-gu, Daejeon 34113, KoreaNanosafety Team, Safety Measurement Institute, Korea Research Institute of Standards and Science (KRISS), 267 Gajeong-ro, Yuseong-gu, Daejeon 34113, KoreaNanosafety Team, Safety Measurement Institute, Korea Research Institute of Standards and Science (KRISS), 267 Gajeong-ro, Yuseong-gu, Daejeon 34113, KoreaTitanium dioxide (TiO<sub>2</sub>) 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<sub>2</sub> 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<sub>2</sub> nanoparticles to determine the optimal conditions for dispersion of TiO<sub>2</sub> nanoparticles in water. Under 395–400 kHz and 100–105 W conditions, 1 wt% TiO<sub>2</sub> 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.https://www.mdpi.com/2079-4991/11/2/427TiO<sub>2</sub> colloidultrasonic dispersionparticle size distributioncolloid stabilitypHzeta potential
collection DOAJ
language English
format Article
sources DOAJ
author Seon Ae Hwangbo
Minjeong Kwak
Jaeseok Kim
Tae Geol Lee
spellingShingle Seon Ae Hwangbo
Minjeong Kwak
Jaeseok Kim
Tae Geol Lee
Novel Surfactant-Free Water Dispersion Technique of TiO<sub>2</sub> NPs Using Focused Ultrasound System
Nanomaterials
TiO<sub>2</sub> colloid
ultrasonic dispersion
particle size distribution
colloid stability
pH
zeta potential
author_facet Seon Ae Hwangbo
Minjeong Kwak
Jaeseok Kim
Tae Geol Lee
author_sort Seon Ae Hwangbo
title Novel Surfactant-Free Water Dispersion Technique of TiO<sub>2</sub> NPs Using Focused Ultrasound System
title_short Novel Surfactant-Free Water Dispersion Technique of TiO<sub>2</sub> NPs Using Focused Ultrasound System
title_full Novel Surfactant-Free Water Dispersion Technique of TiO<sub>2</sub> NPs Using Focused Ultrasound System
title_fullStr Novel Surfactant-Free Water Dispersion Technique of TiO<sub>2</sub> NPs Using Focused Ultrasound System
title_full_unstemmed Novel Surfactant-Free Water Dispersion Technique of TiO<sub>2</sub> NPs Using Focused Ultrasound System
title_sort novel surfactant-free water dispersion technique of tio<sub>2</sub> nps using focused ultrasound system
publisher MDPI AG
series Nanomaterials
issn 2079-4991
publishDate 2021-02-01
description Titanium dioxide (TiO<sub>2</sub>) 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<sub>2</sub> 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<sub>2</sub> nanoparticles to determine the optimal conditions for dispersion of TiO<sub>2</sub> nanoparticles in water. Under 395–400 kHz and 100–105 W conditions, 1 wt% TiO<sub>2</sub> 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.
topic TiO<sub>2</sub> colloid
ultrasonic dispersion
particle size distribution
colloid stability
pH
zeta potential
url https://www.mdpi.com/2079-4991/11/2/427
work_keys_str_mv AT seonaehwangbo novelsurfactantfreewaterdispersiontechniqueoftiosub2subnpsusingfocusedultrasoundsystem
AT minjeongkwak novelsurfactantfreewaterdispersiontechniqueoftiosub2subnpsusingfocusedultrasoundsystem
AT jaeseokkim novelsurfactantfreewaterdispersiontechniqueoftiosub2subnpsusingfocusedultrasoundsystem
AT taegeollee novelsurfactantfreewaterdispersiontechniqueoftiosub2subnpsusingfocusedultrasoundsystem
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