TY - JOUR
T1 - Closed-loop recycling of polyester-cotton blended fabrics through dissolution-precipitation pretreatment and enzymatic depolymerization
AU - Lu, Jianqi
AU - Wu, Wei
AU - Wang, Wenyao
AU - Wu, Biao
AU - Deng, Jinhong
AU - Zhou, Jie
AU - Zhou, Xiaoli
AU - Dong, Weiliang
AU - Jiang, Min
N1 - Publisher Copyright:
© 2025 Elsevier Ltd
PY - 2025/10
Y1 - 2025/10
N2 - Recycling of waste polyester-cotton blended fabrics (PCB) is confronted with challenges due to the different chemical properties of each component and their intertwined structure. Herein, PCBs were degraded into monomers through room-temperature dissolution-precipitation pretreatment and enzymatic depolymerization. Polyester was selectively dissolved and separated from PCB and then precipitated in anti-solvent. The influence of the dissolved PET concentration on the recovery, particle size, and crystallinity of precipitated PET was investigated. The precipitated PET exhibited nanometer size and low crystallinity of 7.8 %, which significantly accelerated the enzymatic depolymerization. The separated cotton fibers from PCB were also enzymatically depolymerized into glucose. At last, real-world PCBs with different component ratios and colors were successfully converted through this approach. This research provides a promising method for closed-loop recycling of PCB wastes.
AB - Recycling of waste polyester-cotton blended fabrics (PCB) is confronted with challenges due to the different chemical properties of each component and their intertwined structure. Herein, PCBs were degraded into monomers through room-temperature dissolution-precipitation pretreatment and enzymatic depolymerization. Polyester was selectively dissolved and separated from PCB and then precipitated in anti-solvent. The influence of the dissolved PET concentration on the recovery, particle size, and crystallinity of precipitated PET was investigated. The precipitated PET exhibited nanometer size and low crystallinity of 7.8 %, which significantly accelerated the enzymatic depolymerization. The separated cotton fibers from PCB were also enzymatically depolymerized into glucose. At last, real-world PCBs with different component ratios and colors were successfully converted through this approach. This research provides a promising method for closed-loop recycling of PCB wastes.
KW - Dissolution-precipitation
KW - Enzymatic depolymerization
KW - Mild pretreatment
KW - Polyester-cotton blended fabrics recycling
UR - http://www.scopus.com/inward/record.url?scp=105007599462&partnerID=8YFLogxK
U2 - 10.1016/j.polymdegradstab.2025.111461
DO - 10.1016/j.polymdegradstab.2025.111461
M3 - 文章
AN - SCOPUS:105007599462
SN - 0141-3910
VL - 240
JO - Polymer Degradation and Stability
JF - Polymer Degradation and Stability
M1 - 111461
ER -