Dynamic contact angles and morphology of PP fibres treated with plasma

Production scale plasma modification of polypropylene baselayer for improved water management properties

“…[22][23][24][25] The wide use of PP-fibers as transfer layer in functional nonwovens has lead to intensive investigation of low pressure and atmospheric plasma processes for modification of wettability and dynamic water adsorption. [26][27][28][29][30] Considerable increase in hydrophilicity could be obtained by plasma modification, the limited time stability of the achieved modifications requires attention as a considerable loss of hydrophilicity can occur during several days of storage. 3,31 Thus, when plasma activation of PP-fabric is intended as pretreatment to achieve a stronger binding of finishing components from aqueous solution, the following wet treatment is performed shortly after the activation as the effect of activation tends to decrease with storage time.…”

A comparative study on the flexural performance of plasma treated polypropylene fiber reinforced cementitious composites

“…The magnitude of etching is hard to measure and etching chemical should be washed out with high amounts of cleaning solutions. Disposal of these wastes may also cause environmental problems (Huang et al, 2006;Morent et al, 2008). On the other hand, mechanical micro-pitting may cause cross-section loss and hard to apply on short fibers with small diameters (Singh et al, 2004).…”

Enzymatic hydrophobization of jute fabrics and its effect on the mechanical and interfacial properties of jute/PP composites

“…The Wilhelmy method measures the pull force or the push force acting on the solid to calculate the dynamic contact angles. According to Huang's description, the relationship between the force acting on samples (F) and the contact angle of samples ($) is as followed [30] (Equation (2)):…”