Poly(ethylene oxide)-Assisted Macromolecular Self-Assembly of Lignin in ABS Matrix for Sustainable Composite Applications

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• 作者：Kokouvi Akato ; Chau D. Tran ; Jihua Chen ; Amit K. Naskar
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2015
• 出版时间：December 7, 2015
• 年：2015
• 卷：3
• 期：12
• 页码：3070-3076
• 全文大小：483K
• ISSN：2168-0485

文摘

In this effort, we report the compatibilization of biomass-derived lignin polymer in acrylonitrile butadiene styrene (ABS) thermoplastic matrix without loss of mechanical properties via poly(ethylene oxide) (PEO)-mediated macromolecular self-assembly. ABS was blended with lignin in different concentrations, and blends with 10 wt % PEO (relative to lignin) were prepared. The relative tensile strength improved slightly at low lignin content but diminished rapidly as the lignin content was increased. However, the inclusion of PEO as an interfacial adhesion promoter helped avoid deleterious effects. Dynamic mechanical analysis showed that PEO plasticized the hard phase and thus lowered the activation energy (E_a) for its relaxation but caused stiffening of the soft phase and increased its E_a. Microscopy revealed that incorporating lignin in ABS led to the statistical dispersion of discrete lignin domains (300鈥?000 nm) which, after PEO addition, were reduced to smaller interconnected particles (200鈥?00 nm). The lignin-extended partially renewable ABS resins showed shear-thinning behavior and reduced viscosity compared to neat ABS. The preferred lignin-loaded compositions reinforced with 20 vol % chopped carbon fibers exhibited mechanical performances (77鈥?0 MPa) equivalent to those of reinforced ABS materials reportedly used in 3D printing applications. This approach could lower the cost of ABS while reducing its carbon footprint.