Porous Silica Particles as Oil Absorbents: Comparison of Meso‐, Macro‐, and Meso/Macro‐Structures

Bulletin of the Korean Chemical Society

Dong Chan Lim³  Dae Han Kim³  Sang Wook Han³  Jongwoo Moon³  Geun Jeong³  Dae Kim³  Kwang‐⁵  Myung‐⁵  Eunmi Hong⁵  Young Dok Kim⁵  Eun Ji Park⁵  Youn Kyoung Cho⁵ 

[1] 010 Republic of Korea;600 Republic of Korea;746 Republic of Korea;Biorefinery Research Group Korea Research Institute of Chemical Technology Daejeon 305‐Department of Chemistry Sungkyunkwan University Suwon 440‐Surface Technology Division Korea Institute of Materials Science (KIMS) Changwon 641‐

关键词: Silica;    Polydimethylsiloxane;    Oil adsorbent;    Weight gain;    Porosity;    Superhydrophobic;   

DOI  :  10.1002/bkcs.10330

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

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.

【 授权许可】

Unknown