Article

Surface modification of polyester nonwoven fabrics by Al2O3 sol–gel coating

Journal of Coatings Technology and Research (Impact Factor: 1.3). 12/2009; 6(4):537-541. DOI: 10.1007/s11998-008-9157-x

ABSTRACT

Nonwoven polyester (PET) fabrics have been extensively studied for various applications. However, the nonwoven PET fabrics
have poor wettability. In this work, nonwoven PET fabrics were impregnated in a stable and transparent alumina sol that was
prepared by the hydrolysis of aluminium isopropoxide using the sol–gel technique. The Al2O3 particles were coated on nonwoven PET fabrics after the rolling-drying process. The surface morphology of modified nonwoven
PET fabrics was characterized by scanning electronic microscopy (SEM) and atomic force microscopy (AFM). The SEM and AFM observations
revealed the formation of the Al2O3 particles on the fiber surface. The Al2O3 coating was also confirmed by Fourier transform infrared (FTIR). The mechanical properties of the coated nonwoven PET fabrics
were investigated using a tensile strength test, and the results showed that the mechanical properties were improved after
surface sol–gel coating. The effect of Al2O3 on the wetting behavior of the fabric was also significantly improved.

Download full-text

Full-text

Available from: Ning Wu
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: A serious drawback of the commonly used textiles of polyester/cotton fibres blends (PET/CO), especially those containing worse cotton brands, is their great susceptibility to form pilling, which adversely affects their performance durability and aesthetic val-ues. Among the many methods of preventing this phenomenon, the thin-coating finishing performed by sol-gel methods provides interesting possibilities in this field. By a proper selection of precursors and synthesis method as well as the deposition of sols, it is possible to form xerogel coats on the fibre surface characterised by considerable hardness and abrasion resistance, thus reducing the formation of pilling, without any deterioration in the aesthetic values of textiles. Moreover, these coatings are strongly combined with the fibre surface and are resistant to the conditions of use and care, including multiple washing proc-esses. The thin-coat finishing of this type also increases the abrasion resistance of textiles with a dominating content of polyester fibres, and thus it positively influences the perform-ance value of textile fabrics. This paper presents the test results of using the hybrid modi-fied SiO 2 /Al 2 O 3 sol developed, synthesised with the use of two precursors: (3-glycidoxypro-pyl) trimethoxysilane (GPTMS) and aluminium isopropoxide (ALIPO), and the conditions of its application to the thin-coat finishing of PET/CO (67:33) woven fabrics were selected to increase their abrasion resistance and prevent the formation of pilling. Consequently, the fabric susceptibility to form pilling was practically completely eliminated (assessment at level 5 according to the Martindale test), and the fabric abrasion resistance was increased by 38%, with the effects obtained being resistant to prolonged laundering. Key words: textile fabric, PET/cotton blends, sol-gel coating, thin-coat finishing, hybride modified sol, xerogel, performance durability of textiles, abrasion resistance, pilling.
    Full-text · Article · Nov 2011 · Fibres and Textiles in Eastern Europe
  • [Show abstract] [Hide abstract]
    ABSTRACT: Cotton was sol–gel treated employing several metal alkoxide precursors (namely, tetraethylortho-silicate, -titanate, -zirconate and aluminium isopropylate) in order to get inorganic phases able to improve the thermal stability and flame retardancy of the fabric, without changing its mechanical features. Indeed, after the sol–gel treatment the fibre/fabric surface was morphologically modified: a homogeneous and compact film located in the fibre interstices (warp and weft) and partially covering their walls was observed for all the systems investigated. These coatings turned out to be responsible of an overall enhancement of the thermal and fire stability of the fabrics preserving, at the same time, the original mechanical properties of the neat cotton in terms of tensile strength and deformation. In addition, such inorganic coatings increased the abrasion resistance of the cotton in a remarkable way.
    No preview · Article · Feb 2012 · Carbohydrate Polymers
  • [Show abstract] [Hide abstract]
    ABSTRACT: The thin‐coat finishing of textiles carried out by the sol–gel methods gain greater and greater importance owing to their suitability for the versatile functionalization of textiles to impart to them properties being difficult and even impossible to obtain with the use of conventional finishing methods. This article presents the test results of the thin‐coat protective finishing of cotton fabrics against abrasion. This treatment consists in depositing hybrid SiO2*/Al2O3 sols synthesized from two precursors: (3‐glycidoxypropyl)trimethoxy‐silane and aluminum isopropoxide on fiber/fabric surface. The abrasion resistance of the fabric treated by the sol–gel method has been increased by about five times according to Martindale test and this effect is resistant to prolonged laundering. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
    No preview · Article · Aug 2012 · Journal of Applied Polymer Science
Show more