Abstract:

For more reasonable recycling waste flax fibers and for expanding the application field of waste textiles,waste flax fibers were used as research subject. As raw material, the waste flax fibers were thermal-modified and the oil adsorption property of modified flax fibers was researched.The chemical structure，morphology and crystallinity of fibers were tested by IR spectroscopy，scanning electron microscope and X-ray diffraction.The contact angle and oil adsorbency of fiber before and after modification were separately measured and compared.The rate of yielding of thermal-modified flax was tested. Effect of temperature, time, oil content of wastewater and times of repeated adsorption on oil adsorbency were analyzed.The experimental results indicate that, the hydrophilic group content of modified flax fiber reduces. Roughness of fiber surface increase and part of crystallization region inside the fiber are destroyed. Lipophilic properties of the fiber is improved and the oil adsorbency of modified flax fiber is about 1.5 times that of unmodified flax fiber.When the adsorption time is 10 minutes, the material can reach absorption equilibrium.The thermal-modified waste flax fiber has fast and repeated oil-absorption ability.

Key words: flax, modification, oil adsorption material, adsorption property