摘要
在基于数字光处理(DLP)技术的3D打印过程中,紫外波段光敏树脂的光固化性能将直接影响工件的打印精度、速度和形貌。选用改性双酚A型环氧丙烯酸酯和脂肪族聚氨酯丙烯酸酯作为低聚物,配合三丙二醇类二丙烯酸酯(TPGDA)和乙氧化三羟甲基丙烷三丙烯酸(TMPEO3TA)作为稀释剂和自由基-阳离子杂化体系作为光引发剂,配置了面向405 nm波段的DLP-3D打印系统的混杂型光敏树脂。研究结果表明,所制备的光敏树脂的体积收缩率控制在2.3%内,室温下的粘度为244 MPa·s,固化速度缩短到0.063 mm/s。相比较于其它国内外光敏树脂,该树脂整体表现出优良的力学性能。在此基础上,通过在树脂中掺杂1%左右的纳米ZnO颗粒助料,材料的力学性能得到进一步改善,体积收缩率降低至2.1%。这一混杂型光敏树脂将可有望应用于对精度要求较高的光电子器件的DLP-3D打印中。
In the 3D printing process based on digital light processing(DLP)technology,the curing performance of the ultraviolet-band photosensitive resin directly affects the printing accuracy,speed and shape of the printed object.In this paper,modified bisphenol A epoxy acrylate and aliphatic urethane acrylate were selected as oligomers,and TPGDA and TMPEO3 TA were used as the diluents to prepare hybrid photosensitive resin by free radical-cation hybridization.The curing test was carried out in a DLP-3D printing system with a wavelength of 405 nm.The results show that the volume shrinkage of the prepared photosensitive resin was controlled within 2.3%,the viscosity at room temperature was lower to 244 MPa·s,and the curing speed was shortened to 0.063 mm/s.The performance of this photosensitive resin was better than other commercialized resins.By further adding 1%nano ZnO particles into the system,the mechanical properties were improved and the volume shrinkage was reduced to 2.1%.This photosensitive resin was expected to be applied in the DLP-3D printing of optoelectronic devices with high precision requirements.
作者
曹阳
张晨
陈笑
王义全
CAO Yang;ZHANG Chen;CHEN Xiao;WANG Yiquan(School of Science,Minzu University of China,Beijing 100081,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2019年第7期7024-7028,7034,共6页
Journal of Functional Materials
基金
国家自然科学基金资助项目(61675238,61775244)
