TiO2/Organic Fluorine Composite Modified Acrylate Emulsion and Its Application to Multifunctional Finishing of Flax Fabrics
GAO Xiaohui1, LI Yufeng1,2,*, FU Xinxin1, FENG Feng1, ZHAO Yang1
1 School of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, Heilongjiang, China 2 School of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, Heilongjiang, China
Abstract: In order to obtain water repellency and UV protection multifunction of the finished flax fabric, titanium dioxide (TiO2) sol was prepared by sol-gel method and modified by silane coupling agent (KH-570) to prepare polymerizable titanium dioxide monomer (Si-TiO2). The core-shell Si-TiO2/fluorinated acrylate composite emulsion finishing agent (TiFAc) was prepared by soap-free emulsion polymerization with dodecafluoroheptyl methacrylate (DFMA) as the organic fluorine monomer. The structure of TiFAc emulsion particle was characterized by FTIR, TEM and XPS. The surface elements and morphology of the finished flax fabric by rolling-drying-baking process were characterized by SEM and EDS. The effect of mass concentration of Si-TiO2 on the application and wearing performance of finished flax fabric such as water repellency, UV protection performance, physical and mechanical properties were analyzed. The results indicate that TiFAc emulsion finished flax fabric showed the best water resistance and UV protection when m(Si-TiO2) reached 5wt%. The water contact angle reached 155.79°, and UV protection factor (UPF) value reached 106.89. The breaking strength and elongation at break of TiFAc emulsion finished flax fabric increased comparing to that of the flax fabric unfinished. The good air permeability of the finished flax fabric still maintains. The finished flax fabric has good durability even after soap washing for 30 times, the water contact angle is still 150.25°, and UPF is 91.13. TiFAc emulsion finishing agent largely improves the applicative value of flax fabrics in daily life and industrial engineering.
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2025, Vol. 39 
