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- Title
Porous Silica Particles as Oil Absorbents: Comparison of Meso-, Macro-, and Meso/Macro-Structures.
- Authors
Kim, Kwang-Dae; Cho, Youn Kyoung; Han, Sang Wook; Park, Eun Ji; Kim, Dae Han; Jeong, Myung-Geun; Kim, Young Dok; Moon, Jongwoo; Hong, Eunmi; Lim, Dong Chan
- Abstract
Silica particles with three different pore structures were synthesized, consisting of only-meso-, only-macro-, and both meso/macro-pores. The meso-pores were approximately 3-30 nm in diameter, whereas the macro-pores were larger than 500 nm. By using chemical vapor deposition of polydimethylsiloxane ( PDMS) on porous silica, the surfaces of the silica became completely hydrophobic. The surfaces on which the PDMS-coated silica particles were distributed showed water contact angles close to 170° and the particles floated perfectly on water. The silica with both meso- and macro-pores showed a much higher oil absorption capacity (2.5-3 times higher capacity) than the other samples with either only meso- or macro-pores. The superior oil absorption capacity of the meso/macro-porous silica was primarily attributed to the extraordinarily high porosity.
- Subjects
POROUS silica; CHEMICAL vapor deposition; POLYDIMETHYLSILOXANE; ABSORPTION; CHEMICAL synthesis; POROSITY
- Publication
Bulletin of the Korean Chemical Society, 2015, Vol 36, Issue 7, p1751
- ISSN
0253-2964
- Publication type
Article
- DOI
10.1002/bkcs.10330