Tuning crack pattern by phase separation in the drying of binary colloid-polymer suspension

被引：12
|
作者：
Liu, Tingting [1 ]
Luo, Hao [1 ]
Ma, Jun [1 ]
Wang, Pengwei [2 ]
Wang, Lixian [3 ]
Jing, Guangyin [1 ,4 ]
机构：
[1] NW Univ Xian, Dept Phys, Xian 710069, Peoples R China
[2] Northwest Inst Nonferrous Met Res NIN, Xian 710016, Peoples R China
[3] Peking Univ, Sch Phys, Beijing 100871, Peoples R China
[4] NanoBiophoton Ctr, Natl Key Lab & Incubat Base Photoelect Technol &, Xian 710069, Peoples R China
来源：
PHYSICS LETTERS A | 2014年 / 378卷 / 16-17期
关键词：
Colloidal suspension; Crack pattern; Phase separation; Drying; DYNAMICS; FABRICATION; CRYSTALS; BEHAVIOR; MODEL;
D O I：
10.1016/j.physleta.2014.02.024
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Drying the colloidal suspension leads to the versatile crack patterns, where the microstructure formed during the drying process determines crack patterns. Here, the polymer is introduced into a silica suspension to tune the crack arrangement in the drying deposit. Five dominated types of crack patterns are defined by varying the ratio of nanoparticles to polymer. Two phase separation processes are proposed to explain the spatial characteristics of the crack patterns: the depletion-induced phase separation of particles and polymer in their mixture; and the separation of water and particle (or polymer) clusters by the water drainage. (C) 2014 Elsevier B.V. All rights reserved,
引用
收藏
页码：1191 / 1199
页数：9
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