摘要
以废旧涤棉织物为原料,乙二醇(EG)为醇解剂,通过改变醇解时间、醇解温度、EG/废旧涤棉织物中聚对苯二甲酸乙二醇酯(PET)质量比(mEG/mPET)、催化剂种类及用量等研究了蓬松态下废旧涤棉织物的醇解工艺,以及醇解过程对涤棉织物中棉纤维性能的影响。结果表明:随着醇解时间、醇解温度的提高,mEG/mPET的增大,涤棉织物的醇解程度增大,各参数达到一定程度后醇解程度基本不变;最佳醇解工艺为涤棉织物中mEG/mPET为2/1,催化剂用量为涤棉织物中PET质量的0.30%,醇解温度196℃,醇解时间1 h;在乙酸锌、碳酸钠、乙酸钾、氯化镁4种催化剂中,碳酸钠综合催化效果最佳;经醇解过程后涤棉织物中棉纤维表面变得粗糙,力学性能有较大下降。
Using post-consumed polyester/cotton blend fabrics as raw material and ethylene glycol （EG） as alcoholysis agent, the alcoholysis process of post-consumed polyester/cotton blend fabrics under bulky condition was studied by regulating alcoholysis time and temperature, mass ratio of EG and polyethylene terephthalate （PET） in the fabrics（ mEG / mPET）, catalyst variety and amount, as was the effect of alcoholysis process on the properties of cotton fiber in polyester/cotton blend fabrics. The results showed that the alcoholysis degree rose while increasing the alcoholysis time and temperature and mEG / mPET , but almost kept unchanged as these parameters rose to a certain degree; the alcoholysis process conditions were optimized as followed： mEG / mPET of 2/1,0.30% catalyst based on PET in the fabrics by mass fraction, alcoholysis temperature 196 ℃ and time 1 h; sodium carbonate had the best catalysis activity among the four catalysts of zinc acetate, sodium carbonate, potassium acetate, magnesium chloride; cotton fiber in polyester/cotton blend fabrics had rougher surface and mechanical properties greatly decreased after alcoholysis process.
出处
《合成纤维工业》
CAS
北大核心
2013年第2期13-16,共4页
China Synthetic Fiber Industry
基金
国家863计划项目(SS2012AA062619)
关键词
聚对苯二甲酸乙二醇酯纤维
废旧涤棉织物
乙二醇
醇解
碳酸钠
力学性能
化学回收
polyethylene terephthalate fiber
post-consumed polyester/cotton blend fabrics
ethylene glycol
alcoholysis
sodium carbonate
mechanical properties
chemical recycling
