HE Hui, HAO Sa, ZHANG Jiawen, LIU Kefei, WU Qingding

(Research Institute of Material Forming Technology，Central South University of Forestry and Technology, Changsha 410004，China)

Abstract: After eucalyptus powder was alkali-treated, maleic anhydride graft(POE)compatibilizer is introduced and polylactic acid(PLA)was combined, eucalyptus-PLA composite wire was prepared in order to expand the field of high-value clean use of eucalyptus and enrich the fused deposition method(FDM)3D printing consumables.Based on the response surface test design and analysis method, the preparation process parameters of eucalyptus-PLA composite wire were optimized.The eucalyptus-PLA composite wire was tested and characterized.Working parameters of FDM-3D printing were optimizedand the product was produced.The results show that when the mass fraction of eucalyptus powder is 15.6%, the mass fraction of compatibilizer POE is 5.1% and the extrusion temperature is 170 ℃, the prepared eucalyptus-PLA composite wire has good thermal stability and high strength, good toughness.For the eucalyptus-PLA composite wire with a specification of 1.75 mm, when the printing temperature is 210 ℃, the filling rate is 60%, the layer height is 0.3 mm and the printing speed is 30 mm/s, the static bending strength ,impact toughness, shore hardness and surface roughness of FDM-3D printing works are the best, which can meet the requirements of household,office decorations and industrial accessories.

Keywords: eucalyptus-polylactic acid composite wire; fused deposition method 3D printing; response surface; parameter optimization

中图分类号：S781.2                            文献标志码：A

文章编号：1008-5548(2022)01-0095-13

DOI:10.13732/j.issn.1008-5548.2022.01.011

收稿日期： 2021-07-13，修回日期：2021-10-22，在线出版时看：2021-12-01。

基金项目：湖南省重点领域研发计划项目，编号：2019GK2244；湖南省自然科学基金-常德市联合基金项目，编号：2020JJ6065。

第一作者简介：何惠(1996—)，女，硕士研究生，研究方向为生物质粉体材料成形理论与技术。E-mail：1390218591@qq.com。

通信作者简介：吴庆定(1963—)，男，教授，博士，博士生导师，研究方向为材料加工工程。E-mail：wudingle@126.com。