Durable antibacterial and hydrophobic cotton fabrics utilizing enamine bonds

Sun

Macromol. Rapid Commun.

et al. 2020

Self Cite

Hantzsch reaction is one of the typical multicomponent reactions (MCRs), and it is employed herein to endow cellulosic materials with fluorescent properties. For example, acetoacetyl (ACAC)‐bearing cotton fabric prepared via transesterification with tert‐butyl acetoacetate is subjected to an aqueous Hantzsch reaction with formaldehyde and ammonium acetate at ambient temperature. A strong fluorescent emission around 460 nm is achieved within 10 min. XPS, fluorescent spectroscopy, and elemental analysis are used to confirm the presence of 1,4‐dihydropyridine (DHP) rings on the surface of the fabric. TGA, SEM, XRD, and mechanical testing results show that the modification process has minimum impact on intrinsic properties of the fabric. The strategy is also shown to be generally applicable to various forms of cellulosic materials and different aldehydes. This fast and simple approach enriches the application of MCR in modification of cellulose and cellulose derivatives.

Section: Figurementioning

confidence: 88%

Robust Fabrication of Fluorescent Cellulosic Materials via Hantzsch Reaction

Sun

Macromol. Rapid Commun.

et al. 2020

Self Cite

“…Cotton and viscose are important cellulose fibers, which are commonly used in the textile industry for producing high-grade fabrics and clothing due to their outstanding properties of a soft handle, good hydrophilicity, biodegradability, air permeability and skin-friendly [1][2][3][4][5][6]. However, pilling of knitted cellulose fibers products is an undesirable phenomenon during wearing and laundering that affects the handle and appearance and greatly shortens the service life of the products [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Improving the Anti-Pilling Performance of Cellulose Fiber Blended Knitted Fabrics with 2,4,6-Trichloropyrimidine Treatment

2020

Pilling is a common and unresolved problem in knitted fabrics, especially for the cellulose fiber blended fabrics, which not only causes an unattractive appearance and an uncomfortable handle, but also reduces the added value of the products. In this study, four different kinds of knitted fabrics were treated with 2,4,6-trichloropyrimidine (TLP) alkaline emulsion by dipping and pad–dry–cure modification processes. The surface morphology and chemical structure of original and treated fabrics were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The anti-pilling performance, thermal properties, physical and mechanical properties and color features of treated fabrics were also evaluated. The results indicated that TLP was successfully covalently crosslinked onto the surface of the cellulose fibers. The dipping process resulted in a better anti-pilling property than that of the pad–dry–cure process, and both treatments could bring about an excellent anti-pilling property and outstanding laundering durability. A pilling grade of 4.5 was achieved for the treated polyester/viscose (T/V) fabric with the dipping process even after 20 washing cycles. In addition, the treated fabrics displayed an enhanced antistatic property and still maintained a soft handle. Besides, the bursting strength and air permeability of treated samples were found to have a slight deterioration, while no apparent differences were found in the color parameters and colorfastness of dyed fabrics. The above results demonstrate that 2,4,6-trichloropyrimidine has the potential application prospect in the functional finishing and home-caring of textiles.

“…Cotton is a green natural cellulosic fiber available abundantly. It has been widely used in daily life because of its favorable properties that include high strength, soft handle, affinity to skin, and bio-degradability [1,2]. However, due to the morphology and moisture affinity of natural origin, cotton fabrics provide a perfect environment for growth of microorganism on the surface [3].…”

Section: Introductionmentioning

confidence: 99%

“…However, due to the morphology and moisture affinity of natural origin, cotton fabrics provide a perfect environment for growth of microorganism on the surface [3]. Depending on moisture, nutrients, temperature and pH value, the bacterial growth can be very fast, which may cause some undesirable effects, such as unpleasant odor, reduction of mechanical strength, stains, and discoloration [1,4]. Even mild bacterial growth can lead to rotting and breakdown of the fibers, which may make the fabric unattractive due to the appearance of unwanted pigmentation.…”

Section: Introductionmentioning

confidence: 99%

Development of Durable Antibacterial Textile Fabrics for Potential Application in Healthcare Environment

et al. 2020

Recently, efforts at development of functional textiles with antibacterial effect have accelerated, the purpose being to provide protection against airborne bio-particles and micro-organisms. Growth of microbes on surface of textile materials can be inhibited by biocidal approach and biostatic approach. This paper describes the development of a healthcare textile with durable antibacterial properties by optimizing the conventional and commercialized antimicrobial agent polybiguanide derivative—poly(hexamethylenebiguanide) (PHMB). Pad-dry-cure method was used to coat PHMB on cotton fabrics. The durability to simulated healthcare laundering of the fabric samples was evaluated in detail. Specifically, effects of detergent and washing cycles were examined. It was found that the optimum finishing condition can impart to the fabrics excellent durability for simulated healthcare washing. The fabric samples showed 100% bactericidal effect after 52 washing cycles, and 104 washings slightly reduced the bactericidal activity. Nevertheless, both simulated healthcare washing and coating treatment were found to have slightly negative influence on the hand feel and tearing strength properties of cotton fabrics.