With the development of 3D printing technology, photo-curable resin can be used to fabricate bulk objects. However, photo-curable epoxy resin used in 3D printers are commonly considered as a stiff material which is fragile. In this study, a molecular designed core-shell particles (CSP) comprising epoxide groups are prepared to improve the toughness and interlayer bonding of stereolithography resin (SLR). Results show that the tensile strength of SLR increases up to 57.2% with the addition of 5% w/w CSP, and the elongation at break increases up to 1303.6% with the addition of 7% w/w CSP. Moreover, the introduction of CSP reduces the anisotropy in tensile strength of fabricated workpieces from 42.1% to 0.3%. This novel SLR/CSP nanocomposite would expand the scope of application of 3D printing photo-curable resin to industrial workpieces with the requirements of stiff, toughness, mechanical isotropy and thermal resistance rather than being limited in the field of model design and prototyping.

随着3D打印技术的发展，光固化树脂可用于制造块状物体。但是，通常将3D打印机中使用的光固化环氧树脂视为易碎的硬质材料。在这项研究中，分子设计的包含环氧基团的核-壳颗粒（CSP）的制备可改善立体光刻树脂（SLR）的韧性和层间键合。结果表明，添加5％w / w的CSP可使SLR的抗张强度提高57.2％，而添加7％w / w的CSP可使断裂伸长率提高至1303.6％。此外，CSP的引入将预制工件的拉伸强度各向异性从42.1％降低到0.3％。