Wetting dynamics of colloidal dispersions on agar gel surfaces
著者
情野, 恵莉
(Seino, Eri)
千田, 茂希
(Chida, Shigeki)
眞山, 博幸
(Mayama, Hiroyuki)
堀田, 純一
(Hotta, Jun-ichi)
野々村, 美宗
(Nonomura, Yoshimune)
上位タイトル
Colloids and Surfaces B: Biointerfaces
Vol.122,
(2014.
10)
,p.1-
6
識別番号
ISSN
0927-7765
DOI
10.1016/j.colsurfb.2014.06.031
その他
PMID:25016539
抄録
We have analyzed the effects of the addition of silica particles on the wetting velocity at flat and fractal agar gel surfaces and the applicability of such particles for controlling the wetting dynamics of water. We found that the contact angle (θD) of colloidal dispersions followed the power law θD ∝ t−x, where t and x are time and a constant. The wetting is inhibited by the addition of a suitable amount of silica particles with a diameter of 20 nm. Specifically, the lowest value for the exponent x occurred when the silica composition was 0.1 wt%. However, such inhibition effects were not observed on the addition of silica particles with a diameter of 100, 550 and 1000 nm. The mechanism of inhibition of the wetting of liquids on gel surfaces can be attributed to slight increase in the local viscosity around the contact line during wetting
