Polyester fibers are the most widely used synthetic fibers in the textile industry. Polyester fibers have many advantages. Among the advantages that can be mentioned are resistance to wrinkles and abrasion, high strength and mechanical properties, good elasticity. In contrast to polyester fibers, it also has disadvantages such as low moisture absorption, static electricity, etc. Therefore, these shortcomings and problems need to be solved. In many cases, surface properties are more important than fiber mass properties. Therefore, using surface treatment methods, these disadvantages and problems are eliminated. The use of wet processes has environmental problems, so it is a more desirable method by replacing dry processes that are less polluting and environmentally friendly. So far, the methods of surface modification with plasma, ozone on polyester fabric have been researched. In this project, for the first time, the combined plasma-ozone method has been used to modify the surface of 100% polyester fabric. The combined effect of plasma-ozone has been compared with that of plasma and ozone surface modification. The effect of all three surface modification methods on white and dyed polyester fabric has also been compared. Samples were treated with plasma, ozone, plasma-ozone at different times. To investigate the effects of surface modification with plasma, ozone, plasma-ozone methods, several tests were performed to measure moisture absorption, wicking, electrical resistance, tensile strength, whiteness index and yellowing index. Scanning electron microscopy has been eva‎luated. The results show that the moisture absorption test and the height of wicking in all three methods of plasma, ozone, plasma-ozone in the white and colored sample has increased compared to the control sample. The highest rate of moisture absorption is related to the plasma-ozone method. Also, the height of wicking in 8 minutes in the black sample was increased by plasma-ozone treatment. Tensile strength in the samples treated with all three methods was slightly reduced compared to the control sample. SEM images show that after treatment, holes have been created in the surface of the fibers, which is why moisture absorption has increased. There is no color difference between the treated samples and the control sample. The whiteness of all white samples except the white sample treated with plasma-ozone increased in 8 minutes.

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