Responsive cellulose-hydrogel composite ink for 4D printing
Responsive cellulose-hydrogel composite ink for 4D printing
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DOI：
10.1016/j.matdes.2018.09.009
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发表时间：
2018-12-15
影响因子：
8.4
通讯作者：
Seddon, Annela M.
中科院分区：
文献类型：
--
作者：
Mulakkal, Manu C.;Trask, Richard S.;Seddon, Annela M.
可持续和具有成本效益的解决方案对于4D打印技术的广泛采用至关重要。本文重点介绍了用于增材制造的纤维素-水凝胶复合材料油墨的开发，介绍了纤维素-水凝胶复合材料的开发和物理特性（稳定性，溶胀潜力和流变性），以确定其适用于响应结构的4D打印。使用羧甲基纤维素（CMC）水胶体与并入的纤维素纸浆纤维产生具有高总纤维素含量（对于脱水复合物，纤维体积分数约为50%）和纤维在水凝胶基质内的良好分散的油墨。在这项研究中开发的复合油墨配方允许使用开源3D打印机顺利挤出，以实现3D空间中受控的材料放置，同时保留纤维素的功能。蒙脱土的加入不仅提高了复合油墨配方的储存稳定性，而且对挤出特性也有有益的影响。通过3D打印精确应用墨水的能力通过制造能够根据预定的设计规则响应于水合/脱水而变形的复杂结构来证明。(C)2018作者爱思唯尔有限公司出版
Sustainable and cost-effective solutions are crucial for the widespread adoption of 4D printing technology. This paper focuses on the development of a cellulose-hydrogel composite ink for additive manufacture, presenting the development and physical characterisation (stability, swelling potential and rheology) of the cellulose-hydrogel composite to establish its suitability for 4D printing of responsive structures. The use of a carboxymethyl cellulose (CMC) hydrocolloid with incorporated cellulose pulp fibres resulted in an ink with a high total cellulose content (fibre volume fraction approximate to 50% for the dehydrated composite) and good dispersion of fibres within the hydrogel matrix. The composite ink formulation developed in this study permitted smooth extrusion using an open source 3D printer to achieve controlled material placement in 3D space while retaining the functionality of the cellulose. The addition of montmorillonite clay not only resulted in enhanced storage stability of the composite ink formulations but also had a beneficial effect on the extrusion characteristics. The ability to precisely apply the ink via 3D printing was demonstrated through fabrication of a complex structure capable of morphing according to pre-determined design rules in response to hydration/dehydration. (C) 2018 The Authors. Published by Elsevier Ltd.