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Natural Polysaccharides as Multifunctional Components for One-Step 3D Printing Tough Hydrogels
Macromolecular Materials and Engineering ( IF 3.9 ) Pub Date : 2021-08-21 , DOI: 10.1002/mame.202100433
Zhonglong Luo 1 , Jiulong Zhou 1 , Zhe Lu 2 , Hongqiu Wei 2 , You Yu 2
Affiliation  

Natural polysaccharides (NPS) are regarded as biomolecular and structural components for preparing high-performance tough hydrogels. But the one-step fabrication of NPS-containing hydrogels in seconds and the template-free design of complicated high-resolution structures are still significant challenges in this field. To meet these requirements, various NPS-containing tough hydrogels are fabricated and processed into 2D/3D structures via the combination of Ru(bpy)32+-mediated photochemistry and extrusion 3D printing technique. The whole fabrication process is one-step, completed in tens of seconds under visible light irradiation. It is found that the used NPS plays a key role in achieving the fabrication of high-performance structured tough hydrogels. The high reactivity of functional groups in the used NPS can shorten their gelation times. Long rigid chains of the used NPS, their hierarchical assemblies, and contrasting multinetworks benefit from the efficient dissipation of mechanical energy and enhancement of its operational stability. Strong supramolecular interactions enable hydrogel precursors to have high viscosities, therefore providing good controllability to design high-resolution and complicated tough hydrogel structures via extrusion 3D printing. It is anticipated that this straightforward fabrication strategy and findings will open new horizons for NPS-containing materials.

中文翻译:

天然多糖作为多功能成分用于一步式 3D 打印坚韧水凝胶

天然多糖(NPS)被认为是制备高性能坚韧水凝胶的生物分子和结构组分。但在几秒钟内一步制造含 NPS 的水凝胶和复杂高分辨率结构的无模板设计仍然是该领域的重大挑战。为了满足这些要求,通过Ru(bpy) 3 2+的组合,制造了各种含NPS 的坚韧水凝胶并加工成2D/3D 结构。-介导的光化学和挤出 3D 打印技术。整个制作过程一步到位,在可见光照射下数十秒内完成。发现使用的 NPS 在实现高性能结构化坚韧水凝胶的制造中起着关键作用。所用 NPS 中官能团的高反应性可以缩短其凝胶时间。使用的 NPS 的长刚性链、它们的分层组件和对比多网络受益于机械能的有效耗散和其操作稳定性的增强。强大的超分子相互作用使水凝胶前体具有高粘度,因此为通过挤出 3D 打印设计高分辨率和复杂的坚韧水凝胶结构提供了良好的可控性。
更新日期:2021-08-21
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