Dust complies with materials in different means, mainly relying on the type of dirt and fabric attributes.
(surfactant powder)
1. Fluid oily dust: mostly adsorbed on textiles via van der Waals pressures. Non-polar mineral oil dirt adheres firmly to hydrophobic fibers such as polyester and polypropylene, but is fairly simple to get rid of on hydrophilic cotton fibers.
2. Water-soluble dirt: adsorbs securely on hydrophilic fabrics such as cotton fibers and is difficult to eliminate, however is simple to diminish on hydrophobic fibers such as polyester and polypropylene.
3. Solid dirt: The adsorption technique is complex, consisting of being secured by twisted fibers, being covered between fibers, and being adsorbed on the concave or smooth surface area of the fiber surface.
According to the pressure classification, the bond of dirt on fabrics can be summed up as adheres to:
( surfactants fight dirt adhesion)
1. Mechanical force bond: strong dust particles stick to the material with the air circulation, which is affected by the density, structure and fiber features of the textile. This sort of dust is very easy to diminish during washing, yet it is tough to eliminate when the particle dimension is less than 0.1 μm.
2. Van der Waals pressure attachment: caused by intermolecular electrostatic destination, induction force and diffusion force, it is the primary factor for dust attachment. Electrostatic attraction is particularly substantial between fibers and dirt with opposite fees, and multivalent cations can enhance this adsorption.
3. Chemical bonding pressure adhesion: Dirt forms hydrogen bonds, ionic bonds and other chemical bonds with fibers, such as clay, fatty acids, protein dust, dyes, ink, and so on. Once securely bonded, it is difficult to get rid of.
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