论文标题
基于乙基纤维素的热可逆的有机凝胶光蛋白天，用于无沉积体积添加剂制造
Ethyl cellulose-based thermoreversible organogel photoresist for sedimentation-free volumetric additive manufacturing
论文作者
论文摘要
液体光吸师在基于光的添加剂制造（AM）领域中很丰富。但是，在新兴的体积AM技术中直接印刷成材料桶$ - $通常是由于较少的几何约束和较少的材料废物$ - $ - $ - $ - $ - $ - $ - $ $在打印低粘度液体单体和由于零件漂移或沉淀而引起的多材料构造时可能是一个限制。使用乙基纤维素（EC）（EC），一种在有机液体中的热塑性可溶性，我们制定了一个简单的三组分透明透明热凝胶光震托，熔化温度约为64 $°c。凝胶的物理交联网络可导致储存模量在0.1 $ -10 kPa的范围内，最大屈服应力为10 wt $ \％$ \％$ ec ec gel photoresist。非零屈服应力可以在低粘度单体中无沉积的层析成像图案，而无需其他硬件或修饰设备。此外，插入打印容器中的对象可以悬挂在凝胶材料中，该材料可以过度打印多层设备，而无需将对象连接到打印容器。与整洁的单体相比，弯曲强度也提高了100％，该制剂的配方为7 wt $ \％$ EC。
Liquid photoresists are abundant in the field of light-based additive manufacturing (AM). However, printing unsupported directly into a vat of material in emerging volumetric AM technologies$-$typically a benefit due to fewer geometric constraints and less material waste$-$can be a limitation when printing low-viscosity liquid monomers and multimaterial constructs due to part drift or sedimentation. With ethyl cellulose (EC), a thermoplastic soluble in organic liquids, we formulate a simple three-component transparent thermoreversible gel photoresist with melting temperature of ~64 $°$C. The physically crosslinked network of the gel leads to storage moduli in the range of 0.1$-$10 kPa and maximum yield stress of 2.7 kPa for a 10 wt$\%$ EC gel photoresist. Non-zero yield stress enables sedimentation-free tomographic volumetric patterning in low-viscosity monomer without additional hardware or modification of apparatus. Additionally, objects inserted into the print container can be suspended in the gel material which enables overprinting of multimaterial devices without anchors connecting the object to the printing container. Flexural strength is also improved by 100% compared to the neat monomer for a formulation with 7 wt$\%$ EC.
