纤维素纳米晶剥离二硫化钨纳米片协同海藻酸钠构筑高固含水性聚氨酯及其3D打印应用

李浩然; 许鸿泽; 王耀东; 黄文旭; 周立娟

doi:10.14028/j.cnki.1003-3726.2026.26.089

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纤维素纳米晶剥离二硫化钨纳米片协同海藻酸钠构筑高固含水性聚氨酯及其3D打印应用

研究论文 | 更新时间：2026-07-13

- 纤维素纳米晶剥离二硫化钨纳米片协同海藻酸钠构筑高固含水性聚氨酯及其3D打印应用
- Construction of High-solid Water-based Polyurethanes Using Cellulose Nanocrystals and Tungsten Disulfide Nanosheets in Synergy with Sodium Alginate, and 3D Printing Applications
- 高分子通报 2026年
- 作者机构：
  
  青岛科技大学高分子科学与工程学院　青岛 266045
  山东星宇手套有限公司　潍坊 261500
- 作者简介：
  
  03280@qust.edu.cn
- 基金信息：
  
  国家自然科学基金(52001081)
- DOI：10.14028/j.cnki.1003-3726.2026.26.089
  中图分类号：
- 收稿：2026-02-27，
  
  录用：2026-03-30，
- 稿件说明：
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李浩然, 许鸿泽, 王耀东, 黄文旭, 周立娟. 纤维素纳米晶剥离二硫化钨纳米片协同海藻酸钠构筑高固含水性聚氨酯及其3D打印应用. 高分子通报, doi: 10.14028/j.cnki.1003-3726.2026.26.089

Li, H. R.; Xu, H. Z.; Wang, Y. D.; Huang, W. X.; Zhou, L. J. Construction of high-solid water-based polyurethanes using cellulose nanocrystals and tungsten disulfide nanosheets in synergy with sodium alginate, and 3D printing applications. Polym. Bull. (in Chinese), doi: 10.14028/j.cnki.1003-3726.2026.26.089
李浩然, 许鸿泽, 王耀东, 黄文旭, 周立娟. 纤维素纳米晶剥离二硫化钨纳米片协同海藻酸钠构筑高固含水性聚氨酯及其3D打印应用. 高分子通报, doi: 10.14028/j.cnki.1003-3726.2026.26.089 DOI：

Li, H. R.; Xu, H. Z.; Wang, Y. D.; Huang, W. X.; Zhou, L. J. Construction of high-solid water-based polyurethanes using cellulose nanocrystals and tungsten disulfide nanosheets in synergy with sodium alginate, and 3D printing applications. Polym. Bull. (in Chinese), doi: 10.14028/j.cnki.1003-3726.2026.26.089 DOI：

摘要

针对传统水性聚氨酯(WPU)乳液固含量低、干燥收缩大及3D打印层间结合弱等瓶颈问题，提出了一种基于纤维素纳米晶体辅助剥离二硫化物纳米片与海藻酸钠(SA)协同稳定的Pickering乳液策略，成功制备了固含量高达70 wt%的高性能WPU乳液，并赋予WPU乳液卓越流变特性：剪切变稀行为、高黏度(1972.8 Pa·s)以及快速的触变恢复性。高固含量设计不仅显著抑制了干燥过程中的水分迁移与体积收缩，使打印构件的尺寸误差控制在12%以内，更促进了打印细丝间的分子链扩散与界面融合，实现了优异的层间黏合。力学性能测试表明，纳米粒子的均匀分散与多重氢键作用赋予WPU弹性体优异的力学性能，其拉伸强度达45.1 MPa，断裂伸长率高达617.8%。本研究通过微观界面工程与宏观流变调控的协同，为高性能WPU复杂结构的精密制造及功能化应用提供了新范式。

Abstract

To address the bottlenecks of traditional waterborne polyurethane (WPU) emulsions

including low solid content

significant drying shrinkage

and poor interlayer adhesion in 3D printing

this study proposes a Pickering emulsion strategy. This approach utilizes cellulose nanocrystals to assist in the exfoliation of disulfide-bonded nanosheets

which are synergistically stabilized with sodium alginate (SA).This strategy successfully yielded a high-performance WPU emulsion with a solid content of 70 wt%

endowing it with exceptional rheological properties

shear thinning behavior

high viscosity (1972.8 Pa·s)

and rapid thixotropic recovery. The high solid content design not only significantly suppresses moisture migration and volume shrinkage during drying

maintaining dimensional errors of printed components within 12%

but also promotes molecular chain diffusion and interfacial fusion between printed filaments

achieving outstanding interlayer adhesion. Mechanical testing revealed that uniform nanoparticle dispersion and multiple hydrogen bonding interactions endowed the WPU elastomer with remarkable mechanical properties: tensile strength reached 45.1 MPa

while elongation at break soared to 617.8%. By synergizing micro-interface engineering with macroscale rheological control

this study establishes a novel paradigm for the precision manufacturing and functional applications of high-performance WPU in complex structures.

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references

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