An Imidazoline Derivative Functionalized Cotton Fabric for Pesticide Protective Clothing

The outbreak of COVID-19 has already generated a huge societal, economic and political losses worldwide. The present study aims to investigate the antiviral activity of Poly(hexamethylene biguanide) hydrochloride (PHMB) treated fabric against COVID-19 by using the surrogate Feline coronavirus. The antiviral analysis indicated that up to 94% of coronavirus was killed after contacting the CVC fabric treated with PHMB for 2 h, which suggests that PHMB treated fabric could be used for developing protective clothing and beddings with antiviral activity against coronavirus and can play a role in fighting the transmission of COVID-19 in the high-risk places.

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Detoxification Properties of Guanidinylated Chitosan Against Chemical Warfare Agents and Its Application to Military Protective Clothing

Polymers ◽

10.3390/polym12071461 ◽

2020 ◽

Vol 12 (7) ◽

pp. 1461 ◽

Cited By ~ 1

Author(s):

Woong Kwon ◽

Euigyung Jeong

Keyword(s):

Acetic Acid ◽

Cotton Fabric ◽

Protective Clothing ◽

Water Solution ◽

Chemical Warfare Agents ◽

Treatment Method ◽

Chemical Warfare Agent ◽

Chemical Warfare ◽

Warfare Agents ◽

First Time

This study investigates the detoxification properties of guanidinylated chitosan against chemical warfare agents and its application to the preparation of military protective clothing. Guanidinylated chitosan was synthesized by chitosan guanidinylation with cyanamide. The detoxification properties of the guanidinylated chitosan were then evaluated using a chemical warfare agent simulant, called diisopropylfluorophosphate (DFP). Cotton fabric was treated with 1 wt.% of guanidinylated chitosan in acetic acid and water solution using the simple and conventional textile treatment method of pad–dry–cure. The detoxification properties of the guanidinylated chitosan-treated cotton fabric were evaluated to investigate the application of guanidinylated chitosan to the preparation of military protective clothing. Subsequently, 71.3% of DFP was hydrolyzed to non-hazardous diisopropylhydrogenphosphate (DHP) in 2 h because of the base organocatalytic activity of 0.02 g guanidinylated chitosan itself. Moreover, 60.1% of DFP was hydrolyzed by the catalytic activity of the guanidinylated chitosan-treated cotton fabric, which contained only 0.0002 g of guanidinylated chitosan. This result shows that the guanidinylated chitosan itself has detoxification properties for hydrolyzing DFP to DHP, and its detoxification properties can be more efficient when applied to cotton fabric because it showed 84.3% of the detoxification properties with only 1 wt.% of guanidinylated chitosan. For the first time, this study shows that guanidinylated chitosan has considerable detoxification properties and can be used as an agent to prepare protective clothing.

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Superamphiphobic and Flame-Resistant Cotton Fabrics for Protective Clothing

10.21203/rs.3.rs-702994/v1 ◽

2021 ◽

Author(s):

Xiang Liu ◽

Qingqing Shao ◽

Jiqiang Cao ◽

Zhaoqun Du ◽

Weidong Yu

Keyword(s):

Contact Angle ◽

Flame Retardant ◽

Cotton Fabric ◽

Flame Retardancy ◽

Protective Clothing ◽

Mechanical Damage ◽

Dip Coating ◽

Water Contact ◽

Protective Properties ◽

Potential Applications

Abstract Superamphiphobic and flame-retardant finishing of cotton fabric can significantly improve its protective properties to expand its applications, such as protective clothing. However, creating such materials is still a challenging issue. Herein, we present a facile strategy to fabricate superamphiphobic and flame-retardant cotton fabric (SFC) via step-by-step dip-coating and spraying technology. Ammonium polyphosphate (APP) endows cotton fabric excellent flame retardancy. The robust coating formed by the polymerization product of ethyl 2-cyanoacrylate (ECA) and 1 H ,1 H ,2 H ,2 H - perfluorooctyl trichlorosilane (FOCS) can not only protect APP from being damaged, but also trap air to form "air plastron", which makes SFC have excellent antifouling, chemical repellence and self-cleaning. The resulting SFC exhibited superamphiphobicity and flame retardancy with water contact angle of 161°, oil contact angle of 158° and LOI of 30%. After UV irradiation, mechanical damage, 180° oven heating and ultrasonic washing, it still maintains excellent hydrophobicity without loss of flame retardancy. This study expands the potential applications of cotton and provides feasible technologies for improving the overall efficiency of cotton.

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