Using Hollow Glass Bead as Glidants to Improve Selective Laser Sintering 3D Printing of Polyurethane Covalent Adaptable Networks

HE Xi-wen; ZHAO Qi-fan; XIA He-sheng; FEI Guo-xia

doi:10.14028/j.cnki.1003-3726.2026.26.050

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Using Hollow Glass Bead as Glidants to Improve Selective Laser Sintering 3D Printing of Polyurethane Covalent Adaptable Networks

更新时间：2026-05-29

- Using Hollow Glass Bead as Glidants to Improve Selective Laser Sintering 3D Printing of Polyurethane Covalent Adaptable Networks
- Polymer Bulletin Vol. 39, Issue 6, Pages: 887-899(2026)
- 作者机构：
  
  先进高分子材料全国重点实验室四川大学高分子研究所　成都 610065
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2026.26.050
  CLC：
- Received：29 January 2026，
  
  Accepted：18 March 2026，
  
  Online First：13 May 2026，
  
  Published：20 June 2026
- 稿件说明：
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何唏文, 赵启凡, 夏和生, 费国霞. 复合助流剂调控动态聚氨酯弹性体粉末流动及其选择性激光烧结3D打印. 高分子通报, 2026, 39(6), 887–899.

He, X. W.; Zhao, Q. F.; Xia, H. S.; Fei, G. X. Using hollow glass bead as glidants to improve selective laser sintering 3D printing of polyurethane covalent adaptable networks. Polym. Bull. (in Chinese), 2026, 39(6), 887–899.
何唏文, 赵启凡, 夏和生, 费国霞. 复合助流剂调控动态聚氨酯弹性体粉末流动及其选择性激光烧结3D打印. 高分子通报, 2026, 39(6), 887–899. DOI： 10.14028/j.cnki.1003-3726.2026.26.050.

He, X. W.; Zhao, Q. F.; Xia, H. S.; Fei, G. X. Using hollow glass bead as glidants to improve selective laser sintering 3D printing of polyurethane covalent adaptable networks. Polym. Bull. (in Chinese), 2026, 39(6), 887–899. DOI： 10.14028/j.cnki.1003-3726.2026.26.050.

摘要

针对选择性激光烧结(SLS)3D打印弹性体粉末流动性差、打印制件层间强度较低的问题，合成了DA键动态聚氨酯弹性体(PUDA)，并通过粉碎、筛分制备了适合SLS 3D打印的PUDA粉体材料，通过SiO

纳米颗粒与空心玻璃微珠(HGM)作为复合助流剂，通过物理混合改性制备PUDA/SiO

/HGM复合粉末，系统探究了改性聚氨酯粉末流动性能、烧结行为以及打印制件的热性能、力学与自修复性能。结果表明，0.2 wt% SiO

与0.5 wt% HGM协同作用时，PUDA粉末静态休止角从54.7°降至29.5°，基本流动能降低，松装密度提升，粉末流动性接近自由流动状态；改性PUDA复合粉末可成功实现SLS的致密化烧结，所得聚氨酯制件表观孔隙率降低至5.09%，打印制件抗拉强度达14.54 MPa，较单一助剂体系提升36.6%，并具有优异自修复性能，修复效率达124%。研究结果为粉末床3D打印聚合物材料改性提供了新途径。

Abstract

Diels-Alder b

onded polyurethane covalent adaptable networks (PUDA) were synthesized and pulverized to prepare PUDA powders for selective laser sintering (SLS) 3D printing. SiO

nanoparticles and hollow glass microspheres (HGM) were used as glidants to modify the PUDA powder. The modified composite powder fluidity

thermal properties

sintering behavior

and mechanical and self-repairing properties of SLS printed parts were systematically investigated. The results show that when 0.2 wt% SiO

and 0.5 wt% HGM are added together

the static angle of repose of the PUDA powder decreases from 54.7° to 29.5°

the basic flow energy decreases

the bulk density increases

and the fluidity is close to free flow. The composite powder can be successfully SLS sintered

and the minimum apparent porosity of the printed parts is 5.09%

and the tensile strength is 14.54 MPa

which is 36.6% higher than that prepared with the single additive system. In addition

the self healing efficiency reaches 124%−126% after 2 h of repair at 120 ℃. The use of glidants can improve the SLS 3D printing of polymers and can be extended to other polymer powders.

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