Effects of ultrasound in coating nano-precipitated CaCO3 with stearic acid
Nano-Precipitated CaCO3 (NPCC) are coated with stearic acid to improve its dispersion in polymer as well as to reduce agglomeration. In this work, coating was done by wet method using ethanol. Ultrasonication was applied to NPCC to de-agglomerate micron size NPCC into smaller size. Effects of amplit...
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| Format: | Article |
| Language: | English |
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Wiley
2009
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| Online Access: | http://eprints.um.edu.my/4503/1/Kow-2009-Effects_of_ultrasoun.pdf |
| _version_ | 1825718951309475840 |
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| author | Kow, Kien Woh Abdullah, Ezzat Chan Abdul Raman, Abdul Aziz |
| author_facet | Kow, Kien Woh Abdullah, Ezzat Chan Abdul Raman, Abdul Aziz |
| author_sort | Kow, Kien Woh |
| collection | UM |
| description | Nano-Precipitated CaCO3 (NPCC) are coated with stearic acid to improve its dispersion in polymer as well as to reduce agglomeration. In this work, coating was done by wet method using ethanol. Ultrasonication was applied to NPCC to de-agglomerate micron size NPCC into smaller size. Effects of amplitude, temperature and energy input of ultrasonication was investigated. The amplitude was varied from 60 to 100 whereas temperature was varied from 5 degrees C to 45 degrees C. The energy input was stressed up from 3.6 kJ to 180 kJ. Mean diameter of NPCC were observed by using Particle Size Analyzer and Transmission Electron Microscopy (TEM). It was found that mean diameter of NPCC do not vary significantly with temperature. Mean diameter of NPCC, however, decreases exponentially with the energy input. Comparisons were done on NPCC coated with others methods such as dry ball milling and aqueous coating TEM images show that coating NPCC with ultrasonication is more uniform than other methods. In addition, first derivative mass loss with temperature (DTG) reveals that NPCC coated with Ultrasonication do not contain excessive free acid as exhibited by those coated in aqueous and dry ball milling. (c) 2009 Curtin University of Technology and John Wiley & Sons, Ltd. |
| first_indexed | 2024-03-06T05:12:08Z |
| format | Article |
| id | um.eprints-4503 |
| institution | Universiti Malaya |
| language | English |
| last_indexed | 2024-03-06T05:12:08Z |
| publishDate | 2009 |
| publisher | Wiley |
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| spelling | um.eprints-45032021-02-10T02:35:52Z http://eprints.um.edu.my/4503/ Effects of ultrasound in coating nano-precipitated CaCO3 with stearic acid Kow, Kien Woh Abdullah, Ezzat Chan Abdul Raman, Abdul Aziz TA Engineering (General). Civil engineering (General) Nano-Precipitated CaCO3 (NPCC) are coated with stearic acid to improve its dispersion in polymer as well as to reduce agglomeration. In this work, coating was done by wet method using ethanol. Ultrasonication was applied to NPCC to de-agglomerate micron size NPCC into smaller size. Effects of amplitude, temperature and energy input of ultrasonication was investigated. The amplitude was varied from 60 to 100 whereas temperature was varied from 5 degrees C to 45 degrees C. The energy input was stressed up from 3.6 kJ to 180 kJ. Mean diameter of NPCC were observed by using Particle Size Analyzer and Transmission Electron Microscopy (TEM). It was found that mean diameter of NPCC do not vary significantly with temperature. Mean diameter of NPCC, however, decreases exponentially with the energy input. Comparisons were done on NPCC coated with others methods such as dry ball milling and aqueous coating TEM images show that coating NPCC with ultrasonication is more uniform than other methods. In addition, first derivative mass loss with temperature (DTG) reveals that NPCC coated with Ultrasonication do not contain excessive free acid as exhibited by those coated in aqueous and dry ball milling. (c) 2009 Curtin University of Technology and John Wiley & Sons, Ltd. Wiley 2009 Article PeerReviewed application/pdf en http://eprints.um.edu.my/4503/1/Kow-2009-Effects_of_ultrasoun.pdf Kow, Kien Woh and Abdullah, Ezzat Chan and Abdul Raman, Abdul Aziz (2009) Effects of ultrasound in coating nano-precipitated CaCO3 with stearic acid. Asia-Pacific Journal of Chemical Engineering, 4 (5). pp. 807-813. ISSN 1932-2135, DOI https://doi.org/10.1002/apj.342 <https://doi.org/10.1002/apj.342>. https://doi.org/10.1002/apj.342 doi:10.1002/apj.342 |
| spellingShingle | TA Engineering (General). Civil engineering (General) Kow, Kien Woh Abdullah, Ezzat Chan Abdul Raman, Abdul Aziz Effects of ultrasound in coating nano-precipitated CaCO3 with stearic acid |
| title | Effects of ultrasound in coating nano-precipitated CaCO3 with stearic acid |
| title_full | Effects of ultrasound in coating nano-precipitated CaCO3 with stearic acid |
| title_fullStr | Effects of ultrasound in coating nano-precipitated CaCO3 with stearic acid |
| title_full_unstemmed | Effects of ultrasound in coating nano-precipitated CaCO3 with stearic acid |
| title_short | Effects of ultrasound in coating nano-precipitated CaCO3 with stearic acid |
| title_sort | effects of ultrasound in coating nano precipitated caco3 with stearic acid |
| topic | TA Engineering (General). Civil engineering (General) |
| url | http://eprints.um.edu.my/4503/1/Kow-2009-Effects_of_ultrasoun.pdf |
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