Property of waste bottle-grade polyethylene terephthalate restored by Ti-based catalysts

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL

AIChE Journal Pub Date : 2024-10-18 DOI:10.1002/aic.18629

Nan Wang, Yi Li, Xiujie Cheng, Ruiqi Zhang, Qing Zhou, Jiayu Xin, Dongxia Yan, Junli Xu, Xingmei Lu

引用次数: 0

Abstract

This study employed titanium catalysts to degrade low-quality PET (polyethylene terephthalate) bottle flakes and subsequently re-polymerized the degradation solution to investigate whether the titanium catalyst could restore the physical and chemical properties of the degraded PET bottle flakes. The reaction process of property restoration was characterized using GPC, DSC, ICP, NMR, and so forth. The mechanism of titanium catalyst-catalyzed PET polymerization was explored through simulation calculations. The results indicate that the waste PET bottle flakes have been restored to the standard of first-grade PET bottle flakes under the degradation and re-polymerization processes with the aid of dibutyl ethylene glycol titanate catalysts. The Ti ion in the recycled PET is stable and the metal ion leached from the restored PET in the strong acid environment meets food-grade safety requirements. This study is expected to provide a new way for recycling waste PET bottle flakes.

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钛基催化剂修复废瓶级聚对苯二甲酸乙二醇酯的性能

本研究采用钛催化剂降解劣质 PET（聚对苯二甲酸乙二酯）瓶片，然后对降解液进行再聚合，以研究钛催化剂能否恢复降解 PET 瓶片的物理和化学性质。利用 GPC、DSC、ICP、NMR 等对性能恢复的反应过程进行了表征。通过模拟计算探讨了钛催化剂催化 PET 聚合的机理。结果表明，在乙二醇钛酸二丁酯催化剂的帮助下，废 PET 瓶片在降解和再聚合过程中恢复到了一级 PET 瓶片的标准。再生 PET 中的 Ti 离子是稳定的，在强酸环境中从复原 PET 中析出的金属离子符合食品级安全要求。这项研究有望为废旧 PET 瓶片的回收利用提供一条新途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.