A simultaneous strategy for the preparation of acetylation modified cellulose nanofiber/polypropylene composites. (1st February 2022)

• Record Type: Journal Article
• Authors: Duan, Linjuan; Liu, Rongrong; Duan, Yan; Li, Zhiqiang; Li, Qun
• Is Part Of: Carbohydrate polymers. Volume 277(2022)
• Publication Date: 2022-02-01
• Subjects: Cellulose nanofibers -- Acetylation modification -- Polypropylene -- Simultaneous method -- Composite materials; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2021.118744
• Languages: English
• ISSNs: 0144-8617

Abstract

Abstract: In this study, a simultaneous method with nano-fibrillation of acetylation modified fibers (A-cellulose) and preparation of cellulose nanofiber (CNF)/apolar polymer composites are proposed. The A-cellulose and isotactic polypropylene (iPP) were initially mixed and then melt-compounding in a twin-screw extruder. Due to the reduction of hydrogen bonding force inside A-cellulose and the high shear force provided by the extruder, acetylated cellulose nanofiber (A-CNF) distributed with the state of a three-dimensional network in PP composites (ACPP) were successful prepared. The scanning electron microscopy (SEM) images of A-CNF, dynamic mechanical analysis (DMA) and X-ray diffraction (XRD) results of ACPP showed that the A-CNF had good interface compatibility with PP matrix, and had the effects of inducing PP crystallization, decreasing crystal size and increasing the ratio of γ crystals in composites, which could improve the mechanical and thermodynamic properties of composites.