Massively parallel simulations of diffusion in dense polymeric structures

Faulon, Jean‐Loup; Hobbs, J.; Ford, David M.; Wilcox, Robert T.

doi:10.1145/509593.509627

Cited by 1 publication

(2 citation statements)

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“…An estimate by molecular dynamics simulations gives D = 1.59 10 -11 m 2 /s. 52 A typical value of h for a textile fiber coating is 100 µm, which gives τ diff = 10.5 minutes. The diffusion time is much smaller than the timescale over which the ambient relative humidity is varying (a few hours for a change in weather, or 12 hours for a day-night cycle).…”

Section: Coat and Humectantmentioning

confidence: 99%

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Wearable and Washable Conductors for Active Textiles

Floch

Yao

Liu

et al. 2017

ACS Appl. Mater. Interfaces

138

116

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ABSTRACT:The emergence of stretchable electronics and its potential integration with textiles have highlighted a challenge: textiles are wearable and washable, but electronic devices are not. Many stretchable conductors have been developed to enable wearable active textiles, but little has been done to make them washable. Here we demonstrate a new class of stretchable conductors that can endure wearing and washing conditions commonly associated with textiles.Such a conductor consists of a hydrogel, a dissolved hygroscopic salt, and a butyl rubber coating.The hygroscopic salt enables ionic conduction, and matches the relative humidity of the hydrogel 2 to the average ambient relative humidity. The butyl rubber coating prevents the loss and gain of water due to the daily fluctuation of ambient relative humidity. We develop the chemistry of dip coating the butyl rubber onto the hydrogel, using silanes to achieve both the crosslink of the butyl rubber and the adhesion between the butyl rubber and the hydrogel. We test the endurance of the conductor by soaking it in detergent while stretching it cyclically, and by machinewashing it. The loss of water and salt is minimal. It is hoped that these conductors open applications in healthcare, entertainment, and fashion.3

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Section: Coat and Humectantmentioning

confidence: 99%

“…A characteristic time of diffusion is where D is the diffusion coefficient of water in butyl rubber and h is its thickness. An estimate by molecular dynamics simulations gives D = 1.59 × 10 –11 m 2 /s . A typical value of h for a textile fiber coating is 100 μm, which gives τ diff = 10.5 min.…”

Section: Coat and Humectantmentioning

confidence: 99%