Journal
CARBOHYDRATE POLYMERS
Volume 294, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2022.119784
Keywords
Regenerated cellulose; 3D printing; Rheological property
Categories
Funding
- National Natural Science Foundation of China [52103091]
- Natural Science Foundation of Jiangsu Province in China [BK20200501]
- Sichuan Sci- ence and Technology Program [2021ZHCG0023]
- State Key Laboratory of Polymer Materials Engineering [sklpme2022-3-15]
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This study successfully prepared an ink with excellent thixotropic property by utilizing residual cellulose microfiber in a dissolved cellulose solution, demonstrating the potential of direct ink writing technique in printing arbitrary three-dimensional configurations.
Direct ink writing, as a prospective three-dimensional (3D) printing technique, opens opportunities for offering high freedom to process cellulose into complex shapes. Current challenges are the accomplishment of dimensional accuracy of printed object and its truly 3D configuration, which put stringent requirements to the ink rheology that should be easily flowable under a suitable shear force while can rapidly recover to solid state after the force is removed. In this study, benefiting from the exquisite regulation of residual cellulose microfiber in a dissolved cellulose solution, a remarkable ink with excellent thixotropic property is prepared, which elaborately balance the traditional rheology tradeoff (extrudability and self-supporting) upon the formation of interconnected microfiber network. As a result, the optimized cellulose ink allows the printed object to successfully display arbitrary and truly 3D configurations, such as anatomical heart, ear, rabbit, lamp, and cup, and exhibit fine microstructure with a resolution of 250 mu m.
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