涤纶降解工艺的对比研究
|
摘要
基于酯的水解、醇解与酶解反应,对涤纶进行降解回收。实验发现,涤纶在温度100℃、浴比1∶40、搅拌速度2 000 r/min、降解1 h的条件下可被浓度为5 mol/L的氢氧化钠或氢氧化钾降解;在温度260℃、搅拌速度1 600 r/min、丙三醇与涤纶质量比为10、质量分数3%的乙酸锌(相对于涤纶质量)的条件下反应1 h被降解;乙二醇在温度180℃、搅拌速度1 600 r/min、质量分数8%的乙酸锌(相对于涤纶质量)、乙二醇与涤纶质量比为40、时间50 min的条件下可降解涤纶;碱性脂肪酶在温度为50℃下振荡1~4 h可对涤纶产生作用,使其强力下降。通过对各个工艺条件、成本以及方案的优缺点进行比较,最终确定乙二醇降解工艺为最佳方法。
Based on ester hydrolysis, alcoholysis and enzymolysis reaction, the degradation of recycled polyester were studied. Experiments found that polyester at temperature of 100 ℃,bath ratio of1∶ 40,the speed of 2 000 r/min,the degradation under the condition of 1 h concentration can be as5 mol/L sodium hydroxide or potassium hydroxide degradation. It can be degradation in the temperature of 260 ℃,the speed of 1 600 r/min,glycerin ∶ polyester = 10,the mass fraction of 3% zinc acetate( relative to the quality of polyester) under the condition of 1 h degradation reaction. In the condition of ethylene glycol in the temperature of 180 ℃,the speed of 1 600 r/min,the mass fraction of 8% zinc acetate( relative to the quality of polyester),ethylene glycol ∶ polyester = 40,time for 50 min,the polyester can be dearadation. Alkaline lipase oscillation under temperature of 50 ℃,1 ~ 4 h for polyester fiber,which makes its strength decreased. In various process conditions and its costs,and compares the advantages and disadvantages of each scheme,it finds that glycol degradation process is the best method.
Based on ester hydrolysis, alcoholysis and enzymolysis reaction, the degradation of recycled polyester were studied. Experiments found that polyester at temperature of 100 ℃,bath ratio of1∶ 40,the speed of 2 000 r/min,the degradation under the condition of 1 h concentration can be as5 mol/L sodium hydroxide or potassium hydroxide degradation. It can be degradation in the temperature of 260 ℃,the speed of 1 600 r/min,glycerin ∶ polyester = 10,the mass fraction of 3% zinc acetate( relative to the quality of polyester) under the condition of 1 h degradation reaction. In the condition of ethylene glycol in the temperature of 180 ℃,the speed of 1 600 r/min,the mass fraction of 8% zinc acetate( relative to the quality of polyester),ethylene glycol ∶ polyester = 40,time for 50 min,the polyester can be dearadation. Alkaline lipase oscillation under temperature of 50 ℃,1 ~ 4 h for polyester fiber,which makes its strength decreased. In various process conditions and its costs,and compares the advantages and disadvantages of each scheme,it finds that glycol degradation process is the best method.
引文
[1]陈阳.热敏高分子涂层的低温等离子体聚合研究[D].上海:东华大学.2013.
[2]宋磊.天然高分子对涤纶织物的整理研究[D].苏州:苏州大学.2013.
[3]郑海建,余天石,葛明桥.丙三醇降解废弃聚酯工艺条件的研究[J].材料导报.2005,26(19):321-340.
[4]张健飞,王晓春,巩继贤,等.酶对DTP及PET纤维的降解性能探讨[J].东华大学学报(自然科学版),2003,29(3):105-109.
[5]王兴原.基于在线红外光谱研究聚对苯二甲酸乙二醇酯(PET)的解聚反应过程[D].杭州:浙江大学.2012.
[6]R López-Fonseca,I Duque-Ingunza,B de Rivas,et al.Chemical recycling of post-consumer PET wastes by glycolysis in the presence of metal salts[J].Polymer Degradation and Stability,2010,95:1022-1028.
[7]王小花.Aspergillus oryzae脂肪酶的制备及其用于涤纶改性的研究[D].上海:东华大学,2006.
[8]施川.废弃PET的降解及其降解产物制备表面活性剂的研究[D].武汉:武汉纺织大学.2012.
[9]郑海建,余天石,葛明桥.丙三醇降解废弃聚酯工艺条件的研究[J].材料导报,2005,26(19):321-340.
[10]张健飞,王晓春,巩继贤,等.酶对DTP及PET纤维的降解性能探讨[J].东华大学学报(自然科学版),2003,29(3):105-109.
[11]王兴原.基于在线红外光谱研究聚对苯二甲酸乙二醇酯(PET)的解聚反应过程[D].杭州:浙江大学.2012.
[12]张子恒.微波法在离子液体制备及催化降解PET聚酯回收对苯二甲酸上的应用研究[D].上海:东华大学,2012.
[2]宋磊.天然高分子对涤纶织物的整理研究[D].苏州:苏州大学.2013.
[3]郑海建,余天石,葛明桥.丙三醇降解废弃聚酯工艺条件的研究[J].材料导报.2005,26(19):321-340.
[4]张健飞,王晓春,巩继贤,等.酶对DTP及PET纤维的降解性能探讨[J].东华大学学报(自然科学版),2003,29(3):105-109.
[5]王兴原.基于在线红外光谱研究聚对苯二甲酸乙二醇酯(PET)的解聚反应过程[D].杭州:浙江大学.2012.
[6]R López-Fonseca,I Duque-Ingunza,B de Rivas,et al.Chemical recycling of post-consumer PET wastes by glycolysis in the presence of metal salts[J].Polymer Degradation and Stability,2010,95:1022-1028.
[7]王小花.Aspergillus oryzae脂肪酶的制备及其用于涤纶改性的研究[D].上海:东华大学,2006.
[8]施川.废弃PET的降解及其降解产物制备表面活性剂的研究[D].武汉:武汉纺织大学.2012.
[9]郑海建,余天石,葛明桥.丙三醇降解废弃聚酯工艺条件的研究[J].材料导报,2005,26(19):321-340.
[10]张健飞,王晓春,巩继贤,等.酶对DTP及PET纤维的降解性能探讨[J].东华大学学报(自然科学版),2003,29(3):105-109.
[11]王兴原.基于在线红外光谱研究聚对苯二甲酸乙二醇酯(PET)的解聚反应过程[D].杭州:浙江大学.2012.
[12]张子恒.微波法在离子液体制备及催化降解PET聚酯回收对苯二甲酸上的应用研究[D].上海:东华大学,2012.