High flexural modulus of polilactide composites for 3D printing technology using multifunctional octaspherosilicates

IF 2.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Bogna Sztorch, Julia Głowacka, Dariusz Brząkalski, Eliza Romanczuk-Ruszuk, Bogdan Marciniec, Robert E. Przekop
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Abstract

In recent years, there has been a growing research interest focused on employing organosilicon compounds, including silsesquioxanes, as modifiers for different polymers. This work describes the methodology for obtaining a new nanocomposite using functionalized spherosilicates, which belong to the general group of silsesquioxane compounds. These modifiers are used as additives to polylactide to improve its properties in the context of the additive technology fused deposition modeling/fuse fabrication filament. The developed materials were characterized by better rheology compared to neat PLA. Differential scanning calorimetry analysis of the additives confirmed their reactive nature. Based on water contact angle tests, it was observed that up to 1.5% of the load, none of the additives influenced the wetting of the material surface. Microscopic images revealed visible agglomerations for the OSS-6MA-2TMOS system, while in samples with a lower share of methacrylic groups, very good dispersion of the additive in the matrix was observed. Also, the microscopic observations showed better melting of the composite layers containing additives in the 3D printing process, combined with the appropriate printing parameters, can ultimately produce more robust objects with fewer voids and discontinuities. The addition also resulted in an increase in mechanical parameters, mainly in terms of bending strength and impact strength.

Graphical abstract

Abstract Image

利用多功能八苯基硅酸盐实现用于 3D 打印技术的高弯曲模量聚乳酸复合材料
近年来,人们对使用有机硅化合物(包括硅倍半氧烷)作为不同聚合物的改性剂的研究兴趣日益浓厚。本研究介绍了使用功能化球硅酸盐(属于硅倍半氧烷化合物总类)获得新型纳米复合材料的方法。这些改性剂被用作聚乳酸的添加剂,以改善其在熔融沉积模型/熔融制造长丝添加剂技术中的性能。与纯聚乳酸相比,所开发的材料具有更好的流变性。添加剂的差示扫描量热分析证实了其反应性。根据水接触角测试观察到,在不超过 1.5% 的载荷下,所有添加剂都不会影响材料表面的润湿性。显微图像显示,OSS-6MA-2TMOS 系统有明显的团聚现象,而在甲基丙烯酸基团比例较低的样品中,添加剂在基体中的分散性非常好。此外,显微镜观察结果表明,在三维打印过程中,含有添加剂的复合材料层的熔化效果更好,再加上适当的打印参数,最终可以生产出更坚固、空洞和不连续性更少的物体。添加剂还提高了机械参数,主要是弯曲强度和冲击强度。
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来源期刊
Journal of Materials Research
Journal of Materials Research 工程技术-材料科学:综合
CiteScore
4.50
自引率
3.70%
发文量
362
审稿时长
2.8 months
期刊介绍: Journal of Materials Research (JMR) publishes the latest advances about the creation of new materials and materials with novel functionalities, fundamental understanding of processes that control the response of materials, and development of materials with significant performance improvements relative to state of the art materials. JMR welcomes papers that highlight novel processing techniques, the application and development of new analytical tools, and interpretation of fundamental materials science to achieve enhanced materials properties and uses. Materials research papers in the following topical areas are welcome. • Novel materials discovery • Electronic, photonic and magnetic materials • Energy Conversion and storage materials • New thermal and structural materials • Soft materials • Biomaterials and related topics • Nanoscale science and technology • Advances in materials characterization methods and techniques • Computational materials science, modeling and theory
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