Preprint Communication Version 1 This version is not peer-reviewed

Hierarchically Porous Silk/Activated-Carbon Composite Fibers for Adsorption and Repellence of Volatile Organic Compounds

Version 1 : Received: 4 February 2020 / Approved: 5 February 2020 / Online: 5 February 2020 (10:38:29 CET)

How to cite: Roberts, A.D.; Lee, J.M.; Magaz, A.; Smith, M.W.; Dennis, M.; Scrutton, N.S.; Blaker, J.J. Hierarchically Porous Silk/Activated-Carbon Composite Fibers for Adsorption and Repellence of Volatile Organic Compounds. Preprints 2020, 2020020057 (doi: 10.20944/preprints202002.0057.v1). Roberts, A.D.; Lee, J.M.; Magaz, A.; Smith, M.W.; Dennis, M.; Scrutton, N.S.; Blaker, J.J. Hierarchically Porous Silk/Activated-Carbon Composite Fibers for Adsorption and Repellence of Volatile Organic Compounds. Preprints 2020, 2020020057 (doi: 10.20944/preprints202002.0057.v1).

Abstract

Fabrics comprised of porous fibers could provide effective passive protection against chemical and biological (CB) threats whilst maintaining high air permeability (breathability). Here, we fabricate hierarchically porous fibers consisting of regenerated silk fibroin (RSF) and activated-carbon (AC) prepared through two fiber spinning techniques in combination with ice-templating – namely cryogenic solution blow spinning (Cryo-SBS) and cryogenic wet-spinning (Cryo-WS). The Cryo-WS RSF fibers had exceptionally small macropores (as low as 0.1 µm) and high specific surface areas (SSAs) of up to 79 m2 g-1. The incorporation of AC could further increase the SSA to 210 m2 g-1 (25 wt. % loading) whilst also increasing adsorption capacity for volatile organic compounds (VOCs).

Subject Areas

porous fibers; activated carbon; ice-templating; ice segregation induced self-assembly; silk fibroin; wet spinning; solution blow spinning

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