废旧涤纶的醇碱混合解聚的探究
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摘要
为了解决废旧涤纶对环境的污染问题,我们使用了醇水混合解聚代替传统的水解法,通过实验探讨了实验温度、醇水比、反应时间、碱的浓度、溶剂体积对废旧涤纶解聚的影响.实验结果表明选取涤纶质量2.5 g的条件下,醇水混合降解温度在75～78℃之间,醇水比7:1,反应时间2 h,碱的质量分数为18%,溶剂体积为40 mL,此时解聚效果达到最佳.
In order to solve the problem of environmental pollution of waste polyethylene terephthalate( PET)caused by waste polyester,we used the mixed depolymerization of alcohol and water instead of the traditional hydrolysis method.The effects of temperature,ratio of alcohol to water,reaction time,concentration of alkali and volume of solvent on depolymerization of waste polyester were investigated by orthogonal experiment.Experimental results show that Select polyester quality 2. 5 grams of the condition the degradation of mixed alcohol water temperature between 75 ℃ to 78 ℃,7:1 alcohol water ratio,reaction time in about two hours,the mass fraction of alkali is 16%,solvent volume of 40 ml,as depolymerizing effect is best.
In order to solve the problem of environmental pollution of waste polyethylene terephthalate( PET)caused by waste polyester,we used the mixed depolymerization of alcohol and water instead of the traditional hydrolysis method.The effects of temperature,ratio of alcohol to water,reaction time,concentration of alkali and volume of solvent on depolymerization of waste polyester were investigated by orthogonal experiment.Experimental results show that Select polyester quality 2. 5 grams of the condition the degradation of mixed alcohol water temperature between 75 ℃ to 78 ℃,7:1 alcohol water ratio,reaction time in about two hours,the mass fraction of alkali is 16%,solvent volume of 40 ml,as depolymerizing effect is best.
引文
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[7] LIU L X,ZHANG D,AN LJ,et al.Hydrolytic Depolymerization of Poly(ethylene terephthalate)Under Microwave Irradiation[J].Joumal of Applied Polymer Science,2005(95):719-723.
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[13]索倩倩.PET醇解反应工艺研究[D].上海:华东理工大学,2017.
[14]刘虹,高鹏飞,丛唯一,等.含油废水中筛选的两种石油降解菌的鉴定及降解效果[J].吉林化工学院学报,2018,35(7):21-25.
[2]李秀华,王自英.PET讲解研究进展[J].塑料科技,2011(4):39.
[3] Zander N,Gillan M,Sweetser D. Recycled PET Nanofibers for Water Filtration Applications[J]Materials,2016,9(4):247.
[4]涂定军.PET降解及绿色改性的研究[D].湖北:湖北工业大学,2017.
[5]杨俊辉.废弃PET的化学降解与回收研究[J].包装工程,2008(4):27-30
[6] YOSHIOKA T,MOTOKI T,OKUWAKI A.Kinetics og Hydrolysis of Poly(ethylene terephthalate)Power in Sulfuric Acid by a Modified Shrinking-core Model[J].Industrial and Engineering Chemistry Research,2001,40(1):75-79.
[7] LIU L X,ZHANG D,AN LJ,et al.Hydrolytic Depolymerization of Poly(ethylene terephthalate)Under Microwave Irradiation[J].Joumal of Applied Polymer Science,2005(95):719-723.
[8] KOSMIDIS V A,ACHILIAS D S,KARAYANNIDIS GP. Poly(ethylene terephthalate)Recycling and Recovery of Pure Terephthalic Acid. Kinetics of a Phase Transfer Catalyzed Alkaline Hydrolysis[J]. Macromolecular Materials and Engineering,2001(286):640-647.
[9]陈士宏,杨惠娣,张玉霞.PET瓶回收技术进展[J].中国塑料,2005,19(12):79-85.
[10]顾家耀,姚剑豪.高相对分子质量PET降解速率研究[J].合成纤维工业,2004,27(2):10-11.
[11]李现顺,甘胜华,岳阳,等.废涤棉纺织品分离回收再生技术研究[J].聚酯工业,2016(6):16-19
[12]陈加敏,孟家光,薛涛.废旧纺织品的回收再利用[J].纺织科技进展,2016(9):10-13.
[13]索倩倩.PET醇解反应工艺研究[D].上海:华东理工大学,2017.
[14]刘虹,高鹏飞,丛唯一,等.含油废水中筛选的两种石油降解菌的鉴定及降解效果[J].吉林化工学院学报,2018,35(7):21-25.