Nanocellulose-Based Ink for Vertically 3D Printing Micro-Architectures with High-Resolution |
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Authors: | Ge Shi Miao Tian Yutong Chen Linxin Zhong Wenli Zhang Zehong Chen Shirong Sun Ruidong Xia Emmanuel I. Iwuoha Xinwen Peng |
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Affiliation: | 1. State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou, 510641 China;2. School of Medicine, South China University of Technology, Guangzhou, Guangdong, 510640 China;3. South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou, 510640 China;4. School of Chemical Engineering and Light Industry, Guangdong University of Technology (GDUT), Guangzhou, Panyu, 510006 China;5. Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210046 China;6. University of the Western Cape (UWC), Robert Sobukwe Road, Cape Town, Bellville, 7535 South Africa |
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Abstract: | Nanocellulose has become an important renewable component for composite inks, owing to its desirable physical properties, reinforcing capabilities, and tunable self-assembly behavior. However, it is difficult to improve the rheological performance of the nanocellulose-based composite to meet the requirement for 3D printing high resolution microarchitectures. Herein, a strategy is proposed that incorporation of amphiphilic molecular surfactant into nanocellulose gel can increase the molecular interaction via hydrophobic bonds and enhance the ink viscoelasticity. Following the design, a composite ink is formulated by adding xylan and Nonaethylene glycol monododecyl ether (C12E9) within nanocellulose gel. A new printing program is designed to achieve vertical writing of the composite ink and obtain free-standing micropillars and microhemispheres with high resolution in dozens of micrometers. The microhemisphere on an atomic force microscope (AFM) cantilever can be used as colloidal probe. This work proves that nanocellulose composite ink is a candidate for 3D printing functional devices with special microstructures. |
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Keywords: | composite ink micro-architectures nanocellulose rheological properties vertical 3D printing |
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