Surface Modification of Cellulose Acetate using UV/O3 Irradiation

Hae-Sung Lee; Yong-Kyun Jeong; Jinho Jang

Surface Modification of Cellulose Acetate using UV/O3 Irradiation

Textile Coloration and Finishing
Abbr : Text. Color. and Finish.
2006, 18(5), pp.35~41
Publisher : The Korean Society Of Dyers And Finishers
Research Area : Engineering > Fiber Engineering > Dyeing Engineering

Hae-Sung Lee ¹, Yong-Kyun Jeong ², Jinho Jang ¹

¹Kumoh National Institute of Technology
²Yee Joo Corporation

Accredited

ABSTRACT

Upon UV/O3 irradiation cellulose acetate (CA) films showed modified surface properties such as increased hydrophilicity and surface roughness as well as increased dyeability to cationic dyes. UV treatment induced photoscission of acetyl groups in the main chain of CA resulting in decreased degree of substitution from 2.2 to 1.3. The slight decreases in reflectance and transmittance were caused by remarkably increased nano-scale surface roughness of the CA surface as much as 20-fold, which can destructively interfere with visible lights of wavelength lower than 500nm. Water contact angle decreased from 54o to 14o with increasing UV energy. Surface energy also increased slightly. The surface energy change was attributed to significant contribution of polar component rather than nonpolar component indicating surface photooxidation of CA film. The increased dyeability to cationic dyes in terms of both K/S and %E may be due to photochemically introduced anionic and dipolar dyeing sites on the film surfaces.

KEYWORDS

Cellulose acetate, UV/O3 irradiation, photooxidation, nano roughness, dyeability1. Introduction Cellulose acetates(CA) in the forms of wovens, knits and nonwovens are used in various textile applications. These include women's linings, woven fashion

Citation status

* References for papers published after 2023 are currently being built.

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