Chandrashekhar S. Malalli

Apparently, you consider a fiber made of pure cotton with a cellulose side to be a natural fiber. Fiber is a natural polymer, polyester, which consists of beta glucose linked by glycosidic bonds. All esters are hydrolyzed in the presence of alkali. Various oligomers are obtained from fiber. They will partially dissolve in the alkali solution. After drying, they will partially settle on the fiber surface.On the surface of the fiber, there will also be NaOH, but not the metal Na.

Respected sir, Fiber coated with alkaline solution has the favorable effects, few are 1, its surface becomes uniform,2. its tensile strength improves,3. it binds better with resin 4fiber absorbs less water .5. coating protects from fungus and bacteria attacks, 6. decreases natural degradation

Dear all, alkaline treatment also named 'mercerization' is a surface purification/cleaning so that the performance of the fiber is enhanced, such as in binding, dispersion. Please check the following documents. My Regards

https://doi.org/10.1016/B978-0-08-102292-4.00003-5

https://www.researchgate.net/publication/305619676_Fundamental_Study_on_The_Effect_of_Alkaline_Treatment_on_Natural_Fibers_Structures_and_Behaviors

https://iopscience.iop.org/article/10.1088/1742-6596/914/1/012030

Le traitement de la fibre végétale à la NaOH encore appelé mercerissage du nom de Jorn Mercer 1884 a pour rôle de renforcer la résistance de la fibre et de rendre la fibre brillante

Respected Sir,

http://dx.doi.org/10.1155/2021/6078155

http://dx.doi.org/10.1002/pc.26326

hope this would be helpful!