Superhydrophobic behaviour of plasma modified electrospun cellulose nanofiber-coated microfibers
In this work, a method is presented for production of a textile cellulose fiber with non-wetting properties suitable for applications ranging from wound care and tissue engineering to clothing and other textile applications. Non-wettability is achieved by coating a textile cellulose microfiber with electrospun cellulose nanofibers, creating a large and rough surface area that is further plasma treated with fluorine plasma. High surface roughness and efficient deposition of covalently bound fluorine groups results in the fiber exhibiting non-wetting properties with contact angle measurements indicating superhydrophobicity (>150° water contact angle). It is an environmentally friendly method and the flexibility of the electrospinning process allows for careful design of material properties regarding everything from material choice and surface chemistry to fiber morphology and fiber assembly, pointing to the potential of the method and the developed fibers within a wide range of applications.
KeywordsCellulose Nanofibers Microfibers Electrospinning Wetting Plasma
The Knut and Alice Wallenberg Foundation is gratefully acknowledged for donating funds for a Swedish research center, the Wallenberg Wood Science Center, financing this work. Also, RISE Holding AB and VINNOVA are acknowledged for financial contributions to the work.
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