Robust and Reprocessable Biorenewable Polyester Nanocomposites In Situ Catalyzed and Reinforced by Dendritic MXene@CNT Heterostructure  

作　　者：Hao Wang Jiheng Ding Hongran Zhao Qinchao Chu Jin Zhu Jinggang Wang 

机构地区：[1]Key Laboratory of Bio‑Based Polymeric Materials Technology and Application of Zhejiang Province,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,People’s Republic of China [2]School of Materials Science and Chemical Engineering,Ningbo University,Ningbo 315211,Zhejiang,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第7期206-222,共17页纳微快报(英文版)

基　　金：financial supports from the National Natural Science Foundation of China(Grant No.NSFC52473104);National Key R&D Program of China(Grant No.2022YFC2104500);Zhejiang Provincial Natural Science Foundation of China(Grant No.Y24B040002);Ningbo 2025 Key Scientific Research Programs(Grant No.2022Z160);the China Postdoctoral Science Foundation(Grant No.2023M733601);the Ningbo Natural Science Foundation(Grant No.2023I333&2023J409).

摘　　要：Renewable 2,5-furandicarboxylic acid-based polyesters are one of the most promising materials for achieving plastic replacement in the age of energy and environmental crisis.However,their properties still cannot compete with those of petrochemical-based plastics,owing to insufficient molecular and/or microstructure designs.Herein,we utilize the Ti_(3)C_(2)T_(x)-based MXene nanosheets for decorating carbon nanotube(CNT)and obtaining the structurally stable and highly dispersed dendritic heterostructured MXene@CNT,that can act as multi-roles,i.e.,polycondensation catalyst,crystal nucleator,and interface enhancer of polyester.The biobased MXene@CNT/polybutylene furandicarboxylate(PBF)(denoted as MCP)nanocomposites are synthesized by the strategy of“in situ catalytic polymerization and hot-pressing”.Benefiting from the multi-scale interactions(i.e.,covalent bonds,hydrogen bonds,and physical interlocks)in hybrid structure,the MCP presents exceptional mechanical strength(≈101 MPa),stiffness(≈3.1 GPa),toughness(≈130 MJ m^(-3)),and barrier properties(e.g.,O_(2)0.0187 barrer,CO_(2)0.0264 barrer,and H2O 1.57×10^(-14) g cm cm^(-2) s Pa)that are higher than most reported bio-based materials and engineering plastics.Moreover,it also displays satisfactory multifunctionality with high reprocessability(90%strength retention after 5 recycling),UV resistance(blocking 85%UVA rays),and solvent-resistant properties.As a state-of-art high-performance and multifunctional material,the novel bio-based MCP nanocomposite offers a more sustainable alternative to petrochemical-based plastics in packaging and engineering material fields.More importantly,our catalysis-interfacial strengthening integration strategy opens a door for designing and constructing high-performance bio-based polyester materials in future.

关 键 词：Bio-based polyesters nanocomposites Dendritic hetero-structured MXene@CNT Catalysis-interfacial strengthening integration High strength and toughness Reprocessability and multifunctionality 

分 类 号：TB332[一般工业技术—材料科学与工程]