Impact of carboxylation and hydrolysis functionalisations on the anti-oil staining behaviour of textiles grafted with poly(N-isopropylacrylamide) hydrogel

Abstract

Functionalisation, especially via hydrolysis, has created efficient PNIPAAm hydrogels grafted onto PET textiles with superior anti-oil staining performance.

Preparation of hydrophilic woven fabrics: Surface modification of poly(ethylene terephthalate) by grafting of poly(vinyl alcohol) and poly(vinyl alcohol)‐g‐(N‐vinyl‐2‐pyrrolidone)

“…The increasing of the hydrophilicity of PET fabric surface after grafting of hydrophilic monomers were also found in the literature, and this was explained with the increase in the number of large rough sites with the increase in the number of grafted chains on fabric surfaces . Accordingly, it could be said that the texture of the HPET surface became rougher after the graft modification, and this helped the penetration/spreading of a water droplet to the PET surface and shortened the wetting time.…”

“…The measurement of the fiber diameters from the micrographs of the relevant samples showed that the diameters are in this ascending order: HPET (9.17 μm) < UPET (9.77 μm) < PVA‐ g ‐HPET (10.14 μm) < PVA‐ g ‐NVP‐ g ‐HPET (10.31 μm). It is also obvious that the pit/crater structures of the HPET fabrics were almost filled with the PVA and copolymer coating after grafting process, and this suggests that these structures may have helped the homogenous polymer coating on the surface . Although the surface of HPET fiber took a film‐like and uniform texture after PVA‐ g ‐NVP grafting, the texture of the PVA on the HPET gives the impression of granular‐like structures was present and concentrated around certain regions.…”

“…Although there have been numerous studies for the graft modification of PET fiber/fabric in the literature, to our knowledge, no report has been present for the grafting of a PVA based‐copolymer or PVA onto PET fabrics. Only in a few studies, the preparation of PET/PVA composites and radiation‐induced graft copolymerization of vinyl acetate onto PET were reported .…”

“…Only in a few studies, the preparation of PET/PVA composites and radiation‐induced graft copolymerization of vinyl acetate onto PET were reported . In the other recent studies, the researchers have focused on the improvement of the other properties of PET fabrics, such as thermoregulating and anti‐oil staining with different materials, such as coating with phase‐changing materials and photografting of poly( N ‐isopropyl acrylamide), respectively. In the latter study, the researchers have also performed a prefunctionalization of PET fabric surface by alkaline hydrolysis and carboxylation to enhance the grafting .…”

“…In the other recent studies, the researchers have focused on the improvement of the other properties of PET fabrics, such as thermoregulating and anti‐oil staining with different materials, such as coating with phase‐changing materials and photografting of poly( N ‐isopropyl acrylamide), respectively. In the latter study, the researchers have also performed a prefunctionalization of PET fabric surface by alkaline hydrolysis and carboxylation to enhance the grafting . In this study, to obtain certain hydrophilicity imparted PET surface, first, a novel graft copolymer, PVA‐ g ‐NVP, was synthesized into two steps: (1) metacryloyl groups introducing to PVA and (2) copolymerization of this prepolymer structure with NVP monomer in an organic solvent mixture.…”