Different types of curtain fabrics were subject to a long lasting treatment. These fabrics are generally used in the manufacture of curtain fabrics, namely 100% cotton, cotton/viscose, cotton/linen and cotton/polyester. In addition to these fabrics, polyester/linen and polyester/viscose blend fabrics were also used. All these fabrics were separately functionalized with monochlorotriazenyl β-cyclodextrin (R-β-CD) and then treated with citronella oil or camphor. The perfumed curtain fabrics were evaluated for smell intensity during almost six months, retained tensile strength and durability of odour (smell) against several washing cycles. Results obtained show that the odour retention of functionalized curtain fabrics is dependent on the amount of β-CD moieties on the curtain fabrics (expressed as nitrogen content).
Unmodified curtain fabric lost its odour after 2 months and the smell intensity was approximately zero. It was also found that at the same nitrogen content (i.e., same amount of β-CD moieties on the fabrics); the odour retention of modified curtain fabrics treated with either citronella oil or camphor was identical. In addition, cellulosic-based curtain fabrics (100% cotton, cotton/viscose and cotton/linen fabrics) showed higher odour retention after 6 months and higher resistance against washing compared with polyester-based curtain fabrics.
