Citation

Tian N, Wei J, Li Y, Li B, Zhang J. J. Colloid. Interface Sci. 2020; 566: 69-78.

Affiliation

Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, PR China. Electronic address: jpzhang@licp.cas.cn.

Copyright

(Copyright © 2020, Elsevier Publishing)

DOI

10.1016/j.jcis.2020.01.067

PMID

31991366

Abstract

Scald is a kind of common injury for human beings caused by contacting with hot liquids and/or vapor. Herein, we report the preparation of an advanced fabric for efficient scald-preventing by dip-coating a common polyester fabric in a hexadecyl polysiloxane (HD-POS) aqueous suspension, which was synthesized via a waterborne and nonfluorinated approach. Thanks to the hierarchical micro-/nanostructure of the fabric, stable bonding of the compact HD-POS layer on the polyester microfibers, and inherent high stability and elasticity of HD-POS, the fabric features excellent hot water repellency even for dynamic boiling water with a high water impalement resistance of up to 5 grades according to the water repellency grade test. In addition, the fabric shows extraordinary mechanical stability, e.g., its superhydrophobicity remained nearly unchanged after 200 cycles washing, 10,000 cycles Martindale abraison or 1000 cycles 100% streching and releasing. It also exhibits superior environmental robustness (117 d outdoor test) and chemical robustness (7 d immersion in 1 M HCl or NaOH solution, 60 min ultrosonication in both water and anchol immersion) in various harsh conditions. By applying as an advanced fabric for efficient scald-preventing, it can avoid direct contact of hot water and vapor with rat skin by preventing penetration of hot water and most of vapor. It could also significantly reduce heat conduction and radiation to rat skin by reducing contact time of hot water with the fabric (decreased 10 s more quickly than the pristine fabric to 60 °C when encountering 100 mL of 92 °C water). As a result, the fabric in contact with the skin keeps dry and the fabric temperature is much lower than that of the pristine fabric once encountering hot water, thus showing great potentials as an advanced fabric for efficient scald-preventing applications.

Copyright © 2020 Elsevier Inc. All rights reserved.

Language: en

Keywords

Hot water repellency; Scald-preventing; Silanes; Superhydrophobic; Surface chemistry