Abstract
Bamboo flour (BF) was grafted onto lactide (LA) in the molten state using stannous octoate as a catalyst to form BF-g-LA. Then, polylactic acid (PLA) was blended with BF (PLA/BF, 85/15 wt %) to prepare PLA/BF/BF-g-LA composites using BF-g-LA as a compatibilizer. The grafting rate of BF was characterized using infrared testing and elemental analysis. To investigate the effect of BF-g-LA on the performance of PLA/BF/BF-g-LA composites, the phase morphology, thermal stability, and mechanical properties of the composites were characterized using scanning electron microscopy, thermogravimetric analysis, and universal material testing, respectively. The addition of BF-g-LA improved the interface compatibility between PLA and BF. When the BF-g-LA content was 2 phr, the tensile and impact strengths of PLA/BF/BF-g-LA composites were 55.3 MPa and 9.56 kJ/m2, representing 30% and 27% increases, respectively, relative to corresponding values for PLA/BF composites.
Highlights
The heavy use and unreasonable disposal of plastics has exacerbated environmental pollution in recent years
polylactic acid (PLA) can be processed with thermoplastic methods, and it has excellent physical properties such as high transparency, biocompatibility, and biodegradability; it is expensive to produce and it is not heat-resistant, which limits its rapid development [3,4,5]
Jiang et al [14] and Prasad et al [15] investigated the mechanical and thermal properties of fiber reinforced PLA composites by treating the surface of sisal fibers with alkali and silica aerogels (SAG)
Summary
The heavy use and unreasonable disposal of plastics has exacerbated environmental pollution in recent years. PLA with starch, wood fiber, bamboo fiber, cotton, linen, and other natural polymers or inorganic fillers. Prepared thermoplastic/starch composites (PLA/TPS) by melt blending PLA. Prepared natural fiber reinforced biodegradable material with short jute and big elephant grass fibers blended with PLA. Jiang et al [14] and Prasad et al [15] investigated the mechanical and thermal properties of fiber reinforced PLA composites by treating the surface of sisal fibers with alkali and silica aerogels (SAG). Bamboo flour (BF) is a renewable, low-cost, natural polymer material; it is often blended with plastic to prepare bamboo/plastic composite materials. Using BF-g-LA as a compatibilizer, we prepared PLA/BF/BF-g-LA composites by blending polylactic acid (PLA) with BF (PLA/BF, 85/15 wt %) and investigated the effect of BF-g-LA on the performance of the composites. The use of BF-g-LA as a compatibilizer for PLA and BF melt blending has not been reported previously
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