300
Cationization as Tool for Functionalization of Cotton
Fig. 7 a LBL treatment, b formation of bilayer by LBL treatment
3.4.4 Layer by Layer Technique
This process is similar to padding method, but here desired padding solution pots are
made with the addition of polyelectrolytes i.e. polycations and polyanions consisting of oppositely charged chemicals. The process is repeated until the satisfactory
multilayer polymeric film of cations-anions are developed on the substrate surface
[51, 52] (Fig. 7).
3.4.5 Sol-Gel Technique
In this method, the monomer solution is converted to a colloidal solution which is
known as sol [53]. The sol is made up of metal salt or metal-organic components in
colloidal suspension form due to the hydrolysis and polymerization reaction [54]. In
this process, the sol is converted to gel i.e. layer of metal oxide on the surface due
to heat treatment. This sol-gel is commonly used in nanoparticles, which are applied
by pad-dry-cure method on the textiles [55, 56] (Fig. 8).
Cationization as Tool for Functionalization of Cotton
Fig. 7 a LBL treatment, b formation of bilayer by LBL treatment
3.4.4 Layer by Layer Technique
This process is similar to padding method, but here desired padding solution pots are
made with the addition of polyelectrolytes i.e. polycations and polyanions consisting of oppositely charged chemicals. The process is repeated until the satisfactory
multilayer polymeric film of cations-anions are developed on the substrate surface
[51, 52] (Fig. 7).
3.4.5 Sol-Gel Technique
In this method, the monomer solution is converted to a colloidal solution which is
known as sol [53]. The sol is made up of metal salt or metal-organic components in
colloidal suspension form due to the hydrolysis and polymerization reaction [54]. In
this process, the sol is converted to gel i.e. layer of metal oxide on the surface due
to heat treatment. This sol-gel is commonly used in nanoparticles, which are applied
by pad-dry-cure method on the textiles [55, 56] (Fig. 8).