Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea; Department of Agriculture, Forestry and Bioresources, Seoul National University, Seoul, 08826, Republic of Korea; Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
Carbohydr Polym. 2021 Jul 1;263:117976. doi: 10.1016/j.carbpol.2021.117976. Epub 2021 Mar 24.
Optimization of the rheological properties of the matrix is critical for high-fidelity matrix-assisted 3D printing (MAP), which enables the free-form fabrication of fluidic soft materials. This report describes the generic criteria observable in the printing process of cellulose nanofiber (CNF) hydrogels: the sharpness of an angled line, the cross-sectional ratio of a feature, the surface roughness of features, and the completeness of multi-line writing. The concentration and physical properties of the CNF affects the printing fidelity by changing the values of the four criteria, which are closely related to the rheological properties of the matrix. The printing fidelity can be enhanced by the optimal combination of the inks and the CNF matrix. Hydrophilic and hydrophobic inks are printed in the CNF matrix demonstrating as a universal matrix for free-form fabrication with liquid inks.
优化基质的流变性能对于高保真度的基质辅助 3D 打印（MAP）至关重要，这使得流体软材料的自由成型成为可能。本报告描述了在纤维素纳米纤维（CNF）水凝胶的打印过程中可以观察到的一般标准：角度线的锋利度、特征的横截面比、特征的表面粗糙度和多线书写的完整性。CNF 的浓度和物理性质通过改变这四个标准的值来影响打印保真度，这与基质的流变性能密切相关。通过优化墨水和 CNF 基质的组合，可以提高打印保真度。亲水性和疏水性墨水在 CNF 基质中打印，证明了它是一种用于自由成型的通用基质，可以与液体墨水一起使用。
