摘要
采用硫酸-机械法分离废旧涤棉混纺织物,研究优化了硫酸处理工艺,分析了分离前后棉和涤纶纤维的形态结构。结果表明:当硫酸质量分数为10%、处理时间为40min、处理温度为95℃时,涤纶纤维和棉纤维的分离效果最好,棉和涤纶纤维的回收率分别为93.5%和98.1%;分离后棉纤维表面出现裂缝和孔洞,长度和细度显著降低,化学组分和结晶结构无显著变化,但结晶度略有增大;分离后涤纶纤维的表面形态、化学组分和结晶结构均无明显变化,但结晶度略有提高,力学性能略有下降。
The wasted polyester-cotton blended fabrics were separated by sulfuric acid-mechanical method.The acid treatment was optimized and the morphology structure of cotton and polyester fiber before and after separation was analyzed.The results show that the cotton and polyester fibers can reach the optimal recovery rate of 93.5% and 98.1%respectively when treated by 10% H2 SO4 at 95℃for 40 minutes.The separated cotton fibers have cracks and holes on surface,obvious decrease in diameter and length,and no significant change in chemical composition and crystal structure,but a little increase in crystallinity.Regarding the separated polyester fibers,there are no significant change in morphology,chemical composition and crystal structure,but a slight increase in crystallinity and decrease in mechanical strength.
引文
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