Abstract
In this work, micrometer copper-zinc alloy particles-reinforced particleboard wood flour/poly (lactic acid) (mCu-Zn/PWF/PLA) wood plastic composites with high gloss and antibacterial properties for 3D printing were prepared by a melt blending process. The structure and properties of the composites with different contents of mCu-Zn were analyzed by means of mechanical testing, dynamic mechanical analysis, thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction, scanning electron microscopy, and antibacterial testing. The results showed that the mechanical properties, thermal stability, and antibacterial performance of the composites were significantly improved, as mCu-Zn was added into the wood plastic composites. When adding 2 wt.% mCu-Zn, the flexural strength of mCu-Zn/PWF/PLA composites (with 5 wt.% of particleboard wood flour) (PWF) increased by 47.1% compared with pure poly (lactic acid) (PLA), and 18.9% compared with PWF/PLA wood plastic composites. The surface gloss was increased by 1142.6% compared with PWF/PLA wood plastic composites. Furthermore, the inhibition rates of mCu-Zn/PWF/PLA composites against Escherichia coli reached 90.43%. Therefore, this novel high gloss and antibacterial wood plastic composites for fused deposition modeling (FDM) 3D printing have potential applications in personalized and classic furniture, art, toys, etc.
Highlights
Wood plastic composites have been widely known for decades and are widely used in furniture, park benches, fences, and door and window frames due to the advantages of low cost, corrosion resistance, insect resistance, and long life compared with natural wood [1,2,3]
The absorption peak at 3348 cm−1 is attributed to the stretching vibration of hydroxyl (–OH) in cellulose, hemi-cellulose, and lignin, and the absorption peak at 2905 cm-1 is attributed to saturated carbon (–C–H) [26]
The absorption peak at 1739 cm−1 is assigned to carbonyl from hemi-cellulose and lignin, the absorption peak at 1239 cm−1 is assigned to the –COO
Summary
Wood plastic composites have been widely known for decades and are widely used in furniture, park benches, fences, and door and window frames due to the advantages of low cost, corrosion resistance, insect resistance, and long life compared with natural wood [1,2,3]. (lactic acid) is a biodegradable polymer with similar properties to many petroleum-based plastics. The preparation of poly (lactic acid)-based wood plastic composites is an attractive research topic, since the composites have a similar appearance to wood, excellent mechanical properties, and are fully. Balar et al developed bio-based thermoplastic composites of poly (lactic acid) and hazelnut shell waste and evaluated the effect of hazelnut content on the thermal and thermomechanical properties of wood plastic composites. The composites are fully degradable, dimensionally stable and have excellent mechanical properties, and can be used as fences, trims, flooring, automotive interior parts, and furniture [5]. Many wood plastic composites have poor thermal properties, rough and dull appearance (surface coating is required), and poor antibacterial effects
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