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Photocurable Elastomer Composites with SiO2-Mediated Cross-Links for Mechanically Durable 3D Printing Materials
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-09-16 , DOI: 10.1021/acsapm.0c00966 Gwajeong Jeong 1 , Chan Ho Park 2 , Bo-Young Kim 1 , Jeongah Kim 1 , Seong-Dae Park 1 , Hyunseung Yang 1 , Woo Sung Lee 1
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-09-16 , DOI: 10.1021/acsapm.0c00966 Gwajeong Jeong 1 , Chan Ho Park 2 , Bo-Young Kim 1 , Jeongah Kim 1 , Seong-Dae Park 1 , Hyunseung Yang 1 , Woo Sung Lee 1
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To realize a wide range of applications using three-dimensional (3D) printing, it is urgent to develop 3D printing resins with exceptional features such as enhanced mechanical properties. Herein, we developed a series of photocurable elastomers incorporating a cross-linkable SiO2 nanofiller for digital light processing (DLP) 3D printing. Methacrylate-functionalized polyether polyol was synthesized for the photocurable elastomers. To enhance the mechanical properties, surface-modified SiO2 nanoparticles (NPs) were incorporated into photocurable elastomers; this led to the generation of interfacial cross-links between the polymer matrix and the NPs surface. The effect of SiO2 NPs on the photocuring behavior of the elastomers was monitored using a photocuring depth test. Due to the small size and exceptional dispersibility of surface-modified SiO2 NPs, suppressed severe light scattering, photocuring process, and 3D printing with a large amount of SiO2 NPs (up to 20 wt %) were evenly conducted. Furthermore, tensile testing and hardness measurements were performed to reveal the effect of SiO2 NPs on the mechanical properties of 3D-printed structures. The elastomer containing 20 wt % of cross-linkable SiO2 NPs was observed to enhance the tensile strength and hardness by 87 and 52%, respectively, overcoming the limitation of conventional composites. To evaluate the resilience of the various photocurable elastomers containing SiO2 NPs, continuous tensile loading–unloading tests were conducted. Furthermore, 3D printing of various structures was carried out using a DLP printer, and their compression and bending deformation was monitored in terms of the amount of SiO2 NPs. Under high pressure, 3D-printed structures containing cross-linkable SiO2 NPs were observed to exhibit mechanical durability without defects. Therefore, this study proposes a promising method for the development of photocurable elastomers, which can be utilized in practical 3D printing applications.
中文翻译：
具有SiO 2介导的交联键的光固化弹性体复合材料，用于机械耐用的3D打印材料
为了使用三维（3D）打印实现广泛的应用，迫切需要开发具有特殊功能（例如增强的机械性能）的3D打印树脂。在本文中，我们开发了一系列可光固化的弹性体，其中包含可交联的SiO 2纳米填料，用于数字光处理（DLP）3D打印。合成了甲基丙烯酸酯官能化的聚醚多元醇用于光固化弹性体。为了提高机械性能，将表面改性的SiO 2纳米颗粒（NPs）掺入到可光固化的弹性体中。这导致在聚合物基质与NPs表面之间产生界面交联。SiO 2的作用使用光固化深度测试监测有关弹性体光固化行为的NP。由于表面改性的SiO 2 NP的体积小和出色的分散性，因此可以均匀地进行抑制严重的光散射，光固化过程以及使用大量SiO 2 NP（最多20 wt％）进行3D打印。此外，进行了拉伸测试和硬度测量，以揭示SiO 2 NPs对3D打印结构的机械性能的影响。包含20 wt％的可交联SiO 2的弹性体观察到NPs分别将抗张强度和硬度提高了87％和52％，克服了传统复合材料的局限性。为了评估各种包含SiO 2 NPs的光固化弹性体的回弹力，进行了连续的拉伸装卸测试。此外，使用DLP打印机进行了各种结构的3D打印，并且根据SiO 2 NP的量监测了它们的压缩和弯曲变形。在高压下，包含可交联SiO 2的3D打印结构观察到NP显示出机械耐久性而没有缺陷。因此，这项研究为光固化弹性体的开发提出了一种有前途的方法，该方法可用于实际的3D打印应用中。
更新日期：2020-11-13
中文翻译：
具有SiO 2介导的交联键的光固化弹性体复合材料，用于机械耐用的3D打印材料
为了使用三维（3D）打印实现广泛的应用，迫切需要开发具有特殊功能（例如增强的机械性能）的3D打印树脂。在本文中，我们开发了一系列可光固化的弹性体，其中包含可交联的SiO 2纳米填料，用于数字光处理（DLP）3D打印。合成了甲基丙烯酸酯官能化的聚醚多元醇用于光固化弹性体。为了提高机械性能，将表面改性的SiO 2纳米颗粒（NPs）掺入到可光固化的弹性体中。这导致在聚合物基质与NPs表面之间产生界面交联。SiO 2的作用使用光固化深度测试监测有关弹性体光固化行为的NP。由于表面改性的SiO 2 NP的体积小和出色的分散性，因此可以均匀地进行抑制严重的光散射，光固化过程以及使用大量SiO 2 NP（最多20 wt％）进行3D打印。此外，进行了拉伸测试和硬度测量，以揭示SiO 2 NPs对3D打印结构的机械性能的影响。包含20 wt％的可交联SiO 2的弹性体观察到NPs分别将抗张强度和硬度提高了87％和52％，克服了传统复合材料的局限性。为了评估各种包含SiO 2 NPs的光固化弹性体的回弹力，进行了连续的拉伸装卸测试。此外，使用DLP打印机进行了各种结构的3D打印，并且根据SiO 2 NP的量监测了它们的压缩和弯曲变形。在高压下，包含可交联SiO 2的3D打印结构观察到NP显示出机械耐久性而没有缺陷。因此，这项研究为光固化弹性体的开发提出了一种有前途的方法，该方法可用于实际的3D打印应用中。
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