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Reinforcement of Polylactic Acid for Fused Deposition Modeling Process with Nano Particles Treated Bamboo Powder.
Cuicui Wang1,2, Lee Miller Smith3, Wenfu Zhang2,4
1Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
Polymers
|July 7, 2019
Summary
This study enhanced bamboo powder (BP) reinforced polylactic acid (PLA) filaments using nano calcium carbonate, cellulose nanofibers, and micro-crystalline cellulose. Modified composites showed improved tensile strength and mechanical properties, with variations based on modification agents and processing methods.
Area of Science:
- Materials Science
- Polymer Science
- Composite Materials
Background:
- Polylactic acid (PLA) is a biodegradable polymer with potential applications in 3D printing.
- Bamboo powder (BP) is an abundant natural filler that can enhance PLA properties.
- Improving the mechanical and dynamic mechanical properties of BP/PLA composites is crucial for advanced applications.
Purpose of the Study:
- To investigate the effects of nano calcium carbonate (CaCO3), cellulose nanofibers (CNF), and micro-crystalline cellulose (MCC) on the properties of BP/PLA composite filaments.
- To evaluate the tensile and dynamic mechanical properties of modified BP/PLA composites.
- To compare the efficacy of different modification agents and processing methods ('one-step' vs. 'two-step') on composite performance.
Main Methods:
- Bamboo powder (BP) was modified using nano CaCO3, CNF, and MCC via impregnation technology.
- BP/PLA composite filaments were prepared using both 'one-step' and 'two-step' methods.
- Tensile properties (tensile strength, elongation at break) and dynamic mechanical properties (storage modulus, loss modulus, loss factor) were analyzed.
Main Results:
- Modified BP/PLA filaments exhibited increased storage modulus (E') below the glass transition temperature (Tg).
- Tensile strength (TS) of modified composites increased significantly, especially with nano CaCO3 via the 'one-step' method (40.33%).
- Elongation at break (EAB) was generally higher in unmodified BP/PLA filaments compared to those treated with nano CaCO3, CNF, or MCC.
Conclusions:
- Nano CaCO3, CNF, and MCC effectively modified BP/PLA composite filaments, enhancing mechanical properties.
- The 'one-step' processing method generally yielded superior tensile strength compared to the 'two-step' method.
- The choice of modifier and processing technique influences the final properties and processability of BP/PLA composites.
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