Mechanical properties and interfacial adhesion mechanism of polyolefin composites reinforced with ethylene vinyl alcohol-coated cellulose microfibers

被引：0
作者：
Zhao, Yixin [1 ]
Zhang, Shuya [1 ]
Zhang, Lei [1 ]
Che, Mingda [1 ,3 ]
Huang, Renliang [2 ,4 ]
Cui, Mei [1 ]
Qi, Wei [1 ]
Su, Rongxin [1 ,2 ,3 ]
机构：
[1] Tianjin Univ, Sch Chem Engn & Technol, State Key Lab Chem Engn, Tianjin 300072, Peoples R China
[2] Tianjin Univ, Sch Marine Sci & Technol, Tianjin Key Lab Marine Environm Res & Serv, Tianjin 300072, Peoples R China
[3] Tianjin Univ, Zhejiang Inst, Ningbo Key Lab Green Petrochem Carbon Emiss Reduct, Ningbo 315201, Zhejiang, Peoples R China
[4] Tianjin Sustainable Novel Mat Co Ltd, Tianjin 300192, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2025年 / 506卷
关键词：
Reinforced polyolefin composites; Cellulose microfibers; Mechanical properties; Thermal stability; Interfacial adhesion; SURFACE MODIFICATION; NATURAL FIBER; POLYPROPYLENE; IMPROVEMENT; NANOFIBERS;
D O I：
10.1016/j.cej.2025.159910
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Cellulose fibers are widely used to reinforce polyolefin composites due to their renewable nature and impressive mechanical properties, especially following updates to the "Packaging and Packaging Waste Directive". However, achieving strong interfacial adhesion between cellulose fibers and polyolefins, while ensuring high mechanical properties of cellulose-reinforced composites in a cost-effective manner, remains a significant challenge. In this study, cellulose microfiber-reinforced high-density polyethylene (HDPE) with enhanced interfacial adhesion was successfully prepared using solution casting, followed by melt extrusion and injection molding. The incorporation of ethylene vinyl alcohol copolymer (EVOH) as a bridging agent and maleic anhydride polypropylene (MAPP) as a crosslinker ensured the homogeneous dispersion of cellulose microfibers (CMF) in HDPE and enhanced the interfacial adhesion between CMF and HDPE. This process successfully achieved the uniform dispersion of CMF in HDPE at a CMF concentration of 30 wt% without the need for chemical modification, solvent-exchange or freeze-drying. In the optimum condition, the tensile strength and flexural strength of EVOH/ CMF-MAPP-HDPE (E/CMF-M-HDPE) increased to 52.5 MPa and 66.8 MPa, respectively, compared with pristine HDPE. Furthermore, the incorporated EVOH and MAPP lowered the melting temperature and enhanced thermal stability of E/CMF-M-HDPE. This manufacturing process also demonstrated a broad versatility of other cellulosereinforced polyolefins. Given its superior mechanical properties and cost-effectiveness, this CMF reinforced polyolefin composite shows great promise in reducing the need for cellulose nanofibrillation and costly modification.
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页数：12
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