Kumar Ritesh, Alex Y, Nayak Biswabaibhaba, Mohanty Smita
School for Advanced Research in Petrochemicals: Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Petrochemicals Engineering and Technology (CIPET), Bhubaneswar, 751024, Odisha, India; Department of Packaging and Logistics, Yonsei University, 1 Yonseidae-gil, Wonju-si, Gangwon-do, 26493, South Korea.
School for Advanced Research in Petrochemicals: Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Petrochemicals Engineering and Technology (CIPET), Bhubaneswar, 751024, Odisha, India.
J Mech Behav Biomed Mater. 2023 May;141:105813. doi: 10.1016/j.jmbbm.2023.105813. Epub 2023 Mar 30.
The growing popularity of additive manufacturing in the science, industry is associated with high-quality products for futuristic applications. This study presents an in-depth characterization and analysis of the effect of poly (ethylene glycol) (PEG) having molecular weight 6000 g/mol used with various concentrations (1%,3%,5%) to modify the 3D printed Polylactide (PLA) part. The influence of PEG on the morphology, structure, thermal, wettability and mechanical properties of the 3D-printed PLA/PEG part was investigated. Herein, the mechanical property of injection moulding, 3D printed specimens, and finite element analysis (FEA) simulation results were also compared. The structure and properties of PLA/PEG blends were different from those of virgin PLA. By DSC analysis, it was found that the glass transition temperature (T) and cold crystallization temperature decreased in the case of the PLA/PEG blend. From TGA it was observed that PLA/PEG blend was thermally stable. It was shown that with the addition of PEG into PLA the tensile strength and young's modulus decrease, whereas elongation percentage and impact strength increase predominantly. The contact angle results indicate that the addition of PEG lowers the contact angle value of the PLA/PEG blend (from 69.32 ± 1.4° to 45.67 ± 1.2°) and increases surface wettability. With 5% PEG loading, PLA/PEG blend showed optimum structural and mechanical properties together with simple processibility.
增材制造在科学、工业领域日益普及，这与面向未来应用的高质量产品相关。本研究深入表征和分析了分子量为6000 g/mol的聚乙二醇（PEG）在不同浓度（1%、3%、5%）下用于改性3D打印聚乳酸（PLA）部件的效果。研究了PEG对3D打印PLA/PEG部件的形态、结构、热性能、润湿性和机械性能的影响。在此，还比较了注塑成型、3D打印试样的机械性能以及有限元分析（FEA）模拟结果。PLA/PEG共混物的结构和性能与纯PLA不同。通过差示扫描量热法（DSC）分析发现，PLA/PEG共混物的玻璃化转变温度（Tg）和冷结晶温度降低。从热重分析（TGA）可知，PLA/PEG共混物具有热稳定性。结果表明，在PLA中添加PEG后，拉伸强度和杨氏模量降低，而伸长率和冲击强度主要增加。接触角结果表明，添加PEG降低了PLA/PEG共混物的接触角值（从69.32±1.4°降至45.67±1.2°）并提高了表面润湿性。在PEG含量为5%时，PLA/PEG共混物表现出最佳的结构和机械性能以及简单的加工性能。
