Cotton fabrics with durable and reusable daylight-induced antibacterial/antiviral functions were developed by using a novel fabrication process, which employs strong electrostatic interaction between cationic cotton fibers anionic photosensitizers. The contains polycationic short chains produced self-propagation of 2-diehtylaminoehtyl chloride (DEAE-Cl) on the surface fibers. Then, fabric (i.e., polyDEAE@cotton) can be readily functionalized photosensitizers like rose Bengal sodium...

The developments of modern surveillance technology pose great challenges to combat concealment for warfighters. Traditional camouflage suits cannot accommodate the need stealth in complex warfare scenarios. Herein, a bidirectional diffusion-controlled situ synthesis methodology is reported achieve electrochromic nanofibrous membranes with mimetic chameleon skin structures (CSENs) by assembling covalent organic frameworks on nanofibers. CSENs exhibit reversible color changes visible and...

Abstract A chemical modification of cotton fabrics by 2-diethylaminoethyl chloride (DEAE-Cl) was achieved, and the resulted demonstrated salt-free dyeing properties with anionic dyes. Nucleophilic property hydroxyl groups in cellulose enhanced under alkaline conditions could react DEAE-Cl, a possessing both nucleophilic electrophilic sites. The monolayered DEAE-grafted further DEAE-Cl to form multiple cationic quaternary ammonium salts (denoted as DEAE@Cotton), which are highly interactive...

The aggregation-caused self-quenching of photosensitizers (PS), especially on a solid substrate, has highly limited their photo-induced biocidal efficiency in practical applications. Here, we designed unique "posture" rose Bengal (RB) cotton-based super-adsorptive fibrous equipment, with RB being separately captured the mesopores porous organic polymers (POPs). resultant daylight-induced cotton fabric enhanced was named as DBwEE-Cotton. activity DBwEE-Cotton achieved based two mechanisms:...

Mo-Ni-Ti alloy sputtering target samples were prepared using Mo powder and Ni-Ti as raw materials by hot isostatic pressing. Density, phase composition, microstructure element distribution of sputtered measured OM, SEM EDS. The experimental results show that pressing can prepare large-sized at lower temperature, the obtained have finer grains, higher density more uniform than non-pressure sintering. In this work, targets (Purity>99.95%, density>99.5%, particle size<100 μm, component...

Abstract Polymers of intrinsic microporosity (PIMs) have broad application prospects in the detoxification chemical warfare agents (CWAs) due to their unique pore structure, good tunable reactivity, and solution processability. However, its structure is relatively homogeneous, resulting high resistance mass transfer. Here, inspired by fractal nature, a engineering strategy proposed develop 3D reactive nanofibrous aerogels featuring hierarchical porous structures minimize transfer resistance....

In recent years, fluorescent carbon dots have attracted great attention due to their good luminescence and low toxicity. Here, blue core–shell structured polymer (CPDs) with high stability under a wide range of pH values, long storage time, excellent fluorescence in various solvents even the solid state were prepared by hydrothermal synthesis dendritic tris(2-aminoethyl)amine (TAEA) citric acid. The CPD core structure provides strong luminescence; shell possesses amount primary amino groups...

Detoxification reaction of chloropicrin in the human body with biological thiols was selected for detection air. The consumption free sulfhydryl group by is colorimetrically detectable addition Ellman's reagent. In this study, glutathione, N-acetyl-l-cysteine, l-homocysteine, cysteamine, and thioglycolic acid were tested as sensing agents vapor ppb concentration range. reactivity investigated based on both their redox properties nucleophilic strength groups. Nylon-6 nanofibrous membrane an...

Alkylating fumigants are widely used in agricultural production for the control of soil-borne pests, but acute toxicity and carcinogenicity these chemicals pose a health threat to farm workers, as well residents. A nanofibrous membrane-based colorimetric sensor relying on nucleophilic substitution reaction 4-(p-nitrobenzyl)pyridine (NBP) is introduced convenient portable detection alkylating fumigants. Comparing with traditional use NBP detecting agents, this system achieves parts per...

Abstract Colorimetric‐warning detoxification nanofibrous membranes (CDNMs) are easily and directly fabricated from electrospinning of a mixture poly(4‐vinylpyridine), 4‐( p ‐nitrobenzyl)pyridine, polyacrylonitrile. They exhibit hierarchical fiber morphology, ensuring fast efficient toward alkylating toxicants. Taking advantage their microporous structure, high specific surface area, strong affinity toxicants the nanofibers, CDNMs rate independent initial toxicant concentration (half‐lives...

SAFE-cotton is fabricated through <italic>in situ</italic> synthesis of nucleophilic porous organic polymers on cotton for fumigant adsorption, detoxification, and colorimetric warning.

A nylon 6 nanofibrous membrane (N6NFM) was covalently modified with 2-diethylaminoethylchloride (DEAE-Cl) to provide self-catalytic functions facilitate the formation of color compounds in reactions 4-( p-nitrobenzyl)pyridine alkylating fumigants. The 2-diethylaminoethyl group on DEAE-Cl-modified N6NFM (DEAE@N6NFM) enables effective elimination hydrohalogenic acids from intermediates that were formed between fumigants and NBP consequently improve their detection sensitivities, especially for...