生物基光敏树脂的制备及其在3D打印中的应用研究

Preparation of Bio-Based Thiol-Ene Photosensitive Resin and Its Application in 3D Printing

摘要: 将生物基材料运用于3D打印技术中，制备生物基光敏树脂，既可以推进3D打印行业的可持续发展，又能有效缓解石油资源短缺，减少环境污染。本论文以环氧大豆油丙烯酸酯(ESOA)为主要原料，与三乙二醇二甲基丙烯酸酯(TEGDMA)，丙烯酸异冰片酯(IBOA)和乙氧化1,6-己二醇二丙烯酸脂(EM2211)制备出一系列3D打印用光敏树脂。通过实时红外光谱测试表明树脂中的双键(C=C)在60 s光照后转化率均在50%~80%之间，树脂的体积收缩率均在5%~10%之间。硬度分析表明含有TEGDMA的树脂硬度最大，达到72.58 HA。热重分析表明树脂的分解温度均高于250℃。拉伸强度测试表明，含有IBOA树脂的断裂拉伸应变达到38.86%，具有较大的韧性。弯曲强度测试表明，含有TEGDMA树脂的弯曲模量和弯曲强度最大，具有较大的硬度。冲击强度测试表明，含有IBOA树脂的韧性最大，含有TEGDMA的树脂吸收功最小。

Abstract: Using bio-based materials in 3D printing technology to prepare bio-based photosensitive resin can not only promote the sustainable development of 3D printing industry, but also effectively alleviate the shortage of oil resources and reduce environmental pollution. In this paper, Epoxy Soybean Oil Acrylate (ESOA) was used as the main raw material, and a series of photosensitive resins for 3D printing were prepared with TEGDMA, IBOA and EM2211. Real time infrared spectroscopy showed that the conversion of double bond (C=C) in the resin was between 50% and 80%. And the volumetric shrinkage of the resin was between 5% and 10%. Hardness analysis showed that the resin containing TEGDMA had the highest hardness, reaching 72.5 HA. Thermogravimetric analysis showed that the decomposition temperature of the resin was higher than 250˚C. The tensile strength test shows that the fracture tensile strain of the resin containing IBOA reaches 38.9%, and it has great toughness. The flexural strength test showed that the resin containing TEGDMA had the highest flexural modulus and flexural strength, and had higher hardness. The impact strength test showed that the resin containing IBOA had the highest toughness and the resin containing TEGDMA had the lowest absorption energy.