磷酸水热法分离回收废旧涤棉混纺织物  被引量:10

Separation and recovery of waste polyester/cotton blended fabric by phosphoric acid hydrothermal method

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作  者:杜永康 陈英[1,2] DU Yongkang;CHEN Ying(College of Chemistry,Chemical Engineering and Biotechnology,Donghua University,Shanghai 201620,China;Key Laboratory of Eco-textiles,Ministry of Education,Shanghai 201620,China)

机构地区:[1]东华大学化学化工与生物工程学院,上海201620 [2]生态纺织品教育部重点实验室,上海201620

出  处:《印染》2021年第10期57-62,共6页China Dyeing and Finishing

摘  要:采用磷酸水热法降解纤维素纤维,并运用于废旧涤棉混纺织物中涤纶组分与纤维素组分的分离。研究了磷酸浓度、水热处理条件对纤维素纤维降解的影响,并使用SEM、FT-IR、XRD和热重分析对水热反应前后纤维素及涤纶纤维的结构及性能进行表征,得到涤棉混纺织物的分离回收工艺参数为磷酸质量分数4%、水热处理温度140℃、水热处理时间3 h。研究表明,该方法将纤维素纤维降解为30~80μm的棒状Ⅰ型纤维素粉末,回收率高达91.67%,结晶度和热稳定性能有所提高;而涤纶仍以表面光滑的纤维形态存在,回收率为96.63%,其化学结构和晶体结构均无变化,结晶度和热稳定性能无明显影响。The hydrothermal method of phosphoric acid is used to degrade cellulose fiber, and used to separate polyester and cellulose in waste polyester/cotton blended fabric. The effects of phosphoric acid concentration and hydrothermal treatment conditions on the degradation of cellulose fiber are studied. SEM, FT-IR, XRD and TG are used to characterize the structure and properties of cellulose and polyester fiber before and after the hydrothermal reaction. The separation and recovery process parameters of blended fabric are: phosphoric acid 4%, hydrothermal temperature 140 ℃, hydrothermal time 3 h. The results show that the cellulose fiber is degraded to 30~80 μm rod-like type Ⅰ cellulose powder, the recovery rate is as high as 91.67%, and the crystallinity and thermal stability are improved;while the polyester still exists in the form of smooth fibers. The recovery rate is 96.63%, the chemical structure and crystal structure are unchanged, and the crystallinity and thermal stability are not significantly affected.

关 键 词:分离回收 磷酸 水热反应 废旧织物 涤棉混纺织物 

分 类 号:TS199[轻工技术与工程—纺织化学与染整工程]

 

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