文献类型：期刊文献

英文题名：Universal approach for developing reprocessable and reprintable plant oil-based resins for digital light processing 3D printing

作者：Zhu, Guoqiang[1,2] Liu, Meiting[1,2] Kou, Zhimin[1,2] Zhang, Guixin[1,2] Bo, Caiying[1,2] Hu, Lihong[1,2] Hu, Yun[1,2] Zhou, Yonghong[1,2]

第一作者：Zhu, Guoqiang

通信作者：Hu, LH[1];Hu, Y[1]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Natl Engn Res Ctr Low Carbon & Efficient Utilizat, Key Lab Biomass Energy & Mat Jiangsu Prov, Nanjing 210042, Peoples R China;[2]Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Nanjing 210037, Peoples R China

年份：2023

卷号：475

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20233814770844);Scopus(收录号：2-s2.0-85171680978);WOS:【SCI-EXPANDED(收录号:WOS:001143975600001)】；

基金：This work was supported by the Fundamental Research Funds for the Central Non-profit Research Institution of CAF (CAFYBB2021ZI001-04) and the National Natural Science Foundation of China (32271819) .

语种：英文

外文关键词：Reprintable 3D printing; Plant oil; High biobased content; Reprocessable DLP printing; Powder blending and modification

摘要：Recently, researchers have shown great interest in the development of biobased and reprintable 3D printing materials for sustainable 3D printing. Herein, a method for developing plant oil (PO)-based digital light processing (DLP) printing resins that are both reprocessable and reprintable is proposed. Biobased UV-curable monomers (POPITs) containing dynamic hindered urea bonds (HUBs) from POs were synthesized via the thiol-ene click reaction. A range of DLP printing resins (POPIT-I) with high biobased content (52.6%-58.1%) were prepared by blending POPITs with the biobased dilute monomer isobornyl acrylate. These resins demonstrated good mechanical and thermal properties (e.g., tensile strength: 45.1-49.5 MPa and Tg: 74-92 degrees C), as well as high DLP printing quality. Reprocessable DLP printing was employed to fabricate large-volume parts through the dissociation and reorganization of HUBs, thereby reducing printing difficulty and printing time. Additionally, a powder blending and modification method was used to recycle and reprint printed materials. The printing materials, including printed green parts and discarded supporting materials, were milled into micron-sized powders and then blended with POPIT-I to prepare the powder blending resins. The milled powders in the powder blending resins were further modified by 2-(tert-butylamino) ethyl methacrylate to prepare reprinting resins. This process resulted in the grafting of C = C onto the powder surface, which eliminated heterogeneity between the powders and POPIT-I. The mechanical and thermal properties of the reprinting resins were comparable with those of POPIT-I even after three rounds of recycling. Furthermore, the reprinting method reported here is applicable to other dynamic covalent bond-based 3D printing systems.