Surface Modification of Coconut Fibers: Latex Coating

Coir fiber, extracted from the coconut husk, has advantages over synthetic fiber by being eco-friendly, economically affordable, and abundantly available. Low density, moderate strength, good sound absorptivity, and lesser health hazards properties show the potential of coir to be used in various applications. However, the high-water absorption property of coir tends to deteriorate the fibers. Coir fibers are used as woven and non-woven textiles and the friction properties of the fiber affect the performance when used as yarn and as technical textiles. This study aimed to study the effect of surface modification of coir fiber with latex coating on surface morphology, water absorption, and frictional properties. Coir fibers were pretreated with alkali (NaOH) solution and then coated by dipping in latex solution. Alkali pretreatment improves the compatibility of the fiber with coating and latex coating improves the hydrophobic property. The investigations were carried out on two types of samples: untreated (UT) and latex-coated (LC) coir fibers. The friction coefficient estimated using a capstan friction test rig and damage in fiber under contact loading are reported.