Abstract
The prevention of refractory organic pollution caused by conventional dyeing and the development of new fabrics with various functions are two issues to be solved urgently in the field of textile fabrication. Here, we report a new environmentally friendly route for the simultaneous coloration and functionalization of textiles by the covalent immobilization of a metal–organic framework, Cr-based MIL-101(Cr), onto the surfaces of nylon fabrics by co-graft polymerization with 2-hydroxyethyl acrylate initiated by γ-ray irradiation. The Cr(III) clusters color the nylon fabric, and the color intensity varies with the MIL-101 content, providing a “green” textile coloration method that is different from conventional dyeing processes. An X-ray diffraction (XRD) analysis shows that the nanoporous structure of the original MIL-101 particles is retained during radiation-induced graft polymerization. Numerous nanopores are introduced onto the surface of the nylon fabric, which demonstrated better sustained-release-of-aroma performance versus pristine nylon fabric in tests. The modified fabrics exhibit laundering durability, with MIL-101 nanoparticles intact on the nylon surface after 30 h of dry cleaning.
Highlights
Textiles, which are unique and necessary to human beings, are used in clothing as well as in decorative and industrial applications
Owing to the abundance of benzene rings in MIL-101, free radicals are generated on its surface upon γ -ray irradiation, which occurs on the nylon fabric
The key to the link between MIL-101 and the nylon fabric realized by the PHEA graft chain is the generation of free radicals in MIL-101 under γ -ray irradiation, which initiates the graft polymerization of hydroxyethyl acrylate (HEA) on MIL-101
Summary
Textiles, which are unique and necessary to human beings, are used in clothing as well as in decorative and industrial applications. Among the wide range of available nanomaterials are metal–organic frameworks (MOFs), which comprise an expanding class of porous crystalline materials built from nodes of metal ions connected by organic linkers[15,16] These materials have shown promise in applications such as gas storage[17,18], molecular separation[19,20,21], heterogeneous catalysis[22,23], drug delivery[24], and chemical sensing[25] because of their high surface areas, tunable pore sizes, and chemical versatility. The in-situ growth method can only be applied to textiles containing carboxyl groups, and the choice of substrates is limited Methods such as coating and deposition can only establish weak physical connections between the MOFs and the substrates, and the functionality of the composite materials is not typically durable with use. The subsequent graft polymerization of HEA (PHEA) establishes a network of covalent bonds that link the MIL-101 nanoparticles and the nylon
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