Stages and Kinetics of Mechanochemical Depolymerization of Poly(ethylene terephthalate) with Sodium Hydroxide
Stages and Kinetics of Mechanochemical Depolymerization of Poly(ethylene terephthalate) with Sodium Hydroxide
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聚对苯二甲酸乙二醇酯与氢氧化钠的机械化学解聚的阶段和动力学
DOI：
10.1021/acssuschemeng.2c03376
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发表时间：
2022
影响因子：
8.4
通讯作者：
Sievers, Carsten
中科院分区：
文献类型：
--
作者：
Tricker, Andrew W.;Osibo, Anuoluwatobi A.;Chang, Yuchen;Kang, Jason X.;Ganesan, Arvind;Anglou, Elisavet;Boukouvala, Fani;Nair, Sankar;Jones, Christopher W.;Sievers, Carsten
消费塑料的有效化学回收（即，解聚成单体）是实现循环材料经济所需的关键步骤。在这项工作中，解聚的聚（对苯二甲酸乙二醇酯）（PET）通过机械化学水解与氢氧化钠进行了研究，在20分钟内实现完全解聚。解聚的阶段进行了研究，通过监测单体产量和PET分子量的变化在反应过程中。单体产率最初随研磨时间线性增加，直到约40%的产率。然而，残留的PET的分子量仅略微降低，这表明类似于收缩核模型的反应方案。随着反应的进行，观察到PET/NaOH从粉末到均匀蜡的物理转变以及解聚速率的同时增加。研究了球粉质量比（BPR）和研磨频率的影响，推导出动力学速率表达式。在此系统中验证了BPR与单体收率之间的线性关系以及研磨频率之间的已知关系。
Efficient chemical recycling of consumer plastics (i.e., depolymerization down to monomers) is a crucial step needed to achieve a circular material economy. In this work, depolymerization of poly(ethylene terephthalate) (PET) via mechanochemical hydrolysis with sodium hydroxide is studied, with complete depolymerization achieved in 20 min. The stages of depolymerization are investigated by monitoring monomer yields and the change in the PET molecular weight over the course of the reaction. The monomer yields initially increase linearly with milling time, up to a yield of roughly 40%. However, the molecular weights of the residual PET decrease concomitantly only slightly, suggesting a reaction scheme analogous to a shrinking core model. As the reaction progresses, a physical transition of the PET/NaOH from a powder to a homogeneous wax and a simultaneous increase in the depolymerization rate are observed. The influence of ball-to-powder mass ratio (BPR) and milling frequency is studied to derive a kinetic rate expression. The linear relationship between BPR and monomer yield and the known relationship between milling frequency are validated for this system.
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影响因子：
3
作者：
CAMPANELLI, JR;KAMAL, MR;COOPER, DG
通讯作者：
COOPER, DG
影响因子：
5.9
作者：
LAMANTIA, FP;VINCI, M
通讯作者：
VINCI, M
影响因子：
4.5
作者：
G. Calvaruso;Matthew T Clough;M. D. K. Rechulski;R. Rinaldi
通讯作者：
G. Calvaruso;Matthew T Clough;M. D. K. Rechulski;R. Rinaldi
影响因子：
13.2
作者：
M. Ryberg;M. Hauschild;Feng Wang;S. Averous-Monnery;Alexis Laurent
通讯作者：
M. Ryberg;M. Hauschild;Feng Wang;S. Averous-Monnery;Alexis Laurent
来自 PET 废料的不饱和聚酯：缩聚动力学
影响因子：
3
作者：
U. Vaidya;V. M. Nadkarni
通讯作者：
V. M. Nadkarni