摘要
有色废弃棉织物数量庞大,但其回收需经过剥色再染色处理,工艺复杂、能源消耗大。经预处理后,不同聚合度的有色废弃棉织物可直接溶解在[Bmim]Cl/DMSO体系和NMMO/H_(2)O体系中,凝固再生后制备得到有色再生纤维素膜制品。本文通过偏光显微镜观察纤维素在两种溶剂体系中的溶解情况,使用色强度指标表征颜色保留情况,并采用红外光谱、X射线衍射、扫描电镜和万能材料试验机对不同聚合度试样再生前后结构性能进行表征。结果表明,两种溶剂体系均是有色废弃棉织物的良溶剂,再生后颜色均得以保留,[Bmim]Cl/DMSO体系对高聚合度试样溶解性更好,制备的再生膜聚合度、结晶度、色强度、力学性能均优于NMMO/H_(2)O体系再生膜,为有色废弃棉织物的绿色回收和高值化应用提供了可能性。
As a result of the continuous growth in world population,rapid development of economy and the fast-changing fashion cycles,a large number of waste textiles are generated each year.Cotton fabrics,as one of the most popular apparel materials due to their unique properties such as wear comfort,delicate color and soft tactility,account for most waste textiles.Under the guidance of recycling development strategy,the green recycle of waste cotton fabrics has attracted more and more attention.Compared with traditional landfill or incineration treatments which result in multiple environmental and social problems,dissolution and regeneration of cellulose is a promising way to recover waste cotton fabrics.Though cellulose is difficult to dissolve in most common solvents due to the complex network of hydrogen bonds,the compact crystal structure as well as the hydrophobic characteristic,a series of green solvent systems including NMMO,ionic liquids,NaOH-based solvents have been developed.However,current research mainly focuses on colorless cotton fabrics.At present,colored waste cotton fabrics must be subjected to stripping treatments before recovering,and then the resultant colorless products would suffer from dyeing process to obtain colors.The structure of waste cotton and the performance of regenerated products would be destroyed during the stripping process and re-dyeing process would increase the production of water contamination,hazardous chemical generation and consumption of energy.Therefore,directly recovering colored cotton fabrics without decolorization treatments can shorten the recycling process,save energy and reduce pollutions,in line with the needs of economic development and the moral requirements of environmental protection.This paper aims at developing feasible technology for the dissolution and recovery of colored waste cotton.Colored cellulose fabrics were pretreated by dilute sulfuric acid for different times to prepare cellulose samples with different degree of polymerization(DP)and small degree of de
作者
庄利欢
王文聪
王鸿博
ZHUANG Lihuan;WANG Wencong;WANG Hongbo(Jiangsu Engineering Technology Research Center of Functional Textile,Jiangnan University,Wuxi 214122,China;Education Ministry Key Laboratory ofScience&Technology for Eco-Textiles,Jiangnan University,Wuxi 214122,China)
出处
《丝绸》
CAS
CSCD
北大核心
2022年第4期16-23,共8页
Journal of Silk
基金
国家自然科学基金项目(51703085)
江苏省自然科学基金项目(BK20170189)
中国博士后科学基金项目(2019M651574)
江苏省博士后科研资助计划项目(2018K108C)。
