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.%为合理利用废弃亚麻,为废弃纺织品的再利用开辟新途径,以废旧亚麻为原料进行热解处理,研究热解处理后亚麻的吸油性能.利用红外光谱、扫描电子显微镜、X射线衍射等手段对亚麻纤维的化学结构、形貌、结晶情况等进行了表征,比较了改性前后纤维的接触角、吸油倍率,测试了热解亚麻的制成率,并分析了温度、时间、废水含油量、重复吸油次数等参数对吸油倍率的影响.实验结果表明:热处理后亚麻的亲水性基团减少,纤维表面粗糙程度提高,纤维内部部分结晶区受到破坏,拒水亲油性能提高,吸油倍率约是未处理亚麻的1.5倍,在吸附时间为10 min左右,热处理亚麻可达到吸油平衡,具有较好的快速、重复吸油能力.
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