Basic dyeable polyester: a new approach using a VUV excimer lamp

Abstract

Surface treatment of polyester fabric was carried out using a vacuum ultraviolet (VUV) excimer lamp. The hydrophilicity of the polyester fabric was significantly improved by surface modification, as indicated by the decrease in wetting time and wicking time. This approach can be used to create added value for polyester fabric, which otherwise suffers from low hydrophilicity. Further changes on irradiation were characterised by atomic force microscopy and the crystallinity and tensile strength of the samples were also tested. Basic dyeability of the microdenier polyester fabric was seen to improve greatly on exposure to the excimer lamp, followed by grafting with acrylic acid. The effects were observed to increase with an increase in irradiation time. The best effect was obtained for irradiation time of 10 min. These enhanced properties were accompanied by an insignificant loss in crystallinity and tensile strength of treated fabrics.

Chemical grafting of curcumin at polyethylene terephthalate woven fabric surface using a prior surface activation with ultraviolet excimer lamp

“…The increase in the K/S values with excimer treatment time cannot be explained by an increase in dye migration inside the fiber because, in a previous study, 12 we already showed that PET fiber's crystallinity remained unchanged with excimer treatment time. Indeed, the increase in the K/S with treatment time is due to the surface-chemically bound curcumin molecules, which are strongly bound to PET surface and could not be removed by ethanol.…”

Sericin-based polyester textile for medical applications

“…These carboxyl groups are polar species capable of increasing the surface energy of the polyester. The increase in hydrophilicity of the PET fabric surface after the VUV excimer treatment is due to formation of polar groups when the PET surface is irradiated with the VUV excimer (Gupta, Siddhan, & Banerjee, 2007). A second reaction, which is simultaneously occurring, is due to the presence of oxygen at the fibre surface which absorbs the high-energy photons to form highly reactive excited oxygen through the ozone cycle, which then reacts with the PET surface to form polar groups that increase surface wettability (Periyasamy, Gupta, & Gulrajani, 2007).…”

Production of cationic dyeable poly(ethylene terephthalate) fibers via nanotechnology

“…Accordingly, a variety of modified PET fibers have been introduced to many end-users in recent years. [3,4] In fact, PET polymers which have no ionic groups such as sulfonate or amine groups cannot be dyed with ionic dyes such as cationic dyes. [1] There are many patents describing the modification of PET fibers by means of physical, chemical and physical-chemical procedures, for example, shortening of polyester chains for reducing their pilling tendency is one of the first physical modification techniques.…”

“…Unfortunately, it is not possible to get bright, lively colors with polyester alone due to its high crystallinity, marked hydrophobicity, lack of chemically active groups and inherent structural deficiencies. [3,4] In fact, PET polymers which have no ionic groups such as sulfonate or amine groups cannot be dyed with ionic dyes such as cationic dyes. [5] To overcome this problem, cationic dyeable polyester (CD-PET) fibers have been developed by incorporation of polar sites into the polymer structure to which dye molecules can be attached to these sites.…”