Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/13177
Title: In-situ growth of silica nanoparticles on cellulose and application of hierarchical structure in biomimetic hydrophobicity
Authors: Chen, X
Liu, Y
Lu, H
Yang, H
Zhou, X
Xin, JH 
Keywords: Cellulose
Hydrophobicity
Nanopartilces
Roughness
Silica
Issue Date: 2010
Source: Cellulose, 2010, v. 17, no. 6, p. 1103-1113 How to cite?
Journal: Cellulose 
Abstract: Monodispersed silica nanoparticles were prepared by a simple two-step method with hydrolysis and condensation. The materials were characterized by dynamic light scattering (DLS), SEM and TEM. Through in-situ growth of silica nanoparticles on cotton fabrics, a dual-scaled surface with nanoscaled roughness of silica and microscaled roughness of cellulose fiber was generated. After the modification of the low surface energy, the wettability of smooth silicon slide, silicon slide with nanoscaled roughness of silica particles, cotton fabric, and cotton fabric with silica particles was evaluated by the tests of the contact angle (CA) and the advancing and receding contact angle (ARCA). The cotton fabric with dual-scaled roughness exhibits a static CA of 149. 8° for 4 μL water droplet and a hysteresis contact angle (HCA) of 1.8°. The results of CA and HCA show that microscaled roughness plays a more important role than nanoscaled roughness for the value of CA and HCA. The results in the hydrostatic pressure test and the rain test show the important contribution of nanoscaled roughness for hydrophobicity.
URI: http://hdl.handle.net/10397/13177
ISSN: 0969-0239
DOI: 10.1007/s10570-010-9445-3
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