Natural Polysaccharides as Multifunctional Components for One-Step 3D Printing Tough Hydrogels
Natural Polysaccharides as Multifunctional Components for One-Step 3D Printing Tough Hydrogels
复制标题
天然多糖作为多功能成分，用于一步 3D 打印坚韧水凝胶
DOI：
10.1002/mame.202100433
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发表时间：
2021-08-21
影响因子：
3.9
通讯作者：
Yu, You
中科院分区：
文献类型：
--
作者：
Luo, Zhonglong;Zhou, Jiulong;Yu, You
天然多糖被认为是制备高性能坚韧水凝胶的生物分子和结构组分。但是，在几秒钟内一步制备含有NPS的水凝胶和复杂的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+）介导的光化学和挤出3D打印技术的组合，制备并加工成各种含有NPS的坚韧水凝胶的2D/3D结构。整个制作过程是一步完成的，在可见光照射下在几十秒内完成。结果发现，所使用的凝胶在实现高性能的结构化坚韧水凝胶的制造中起着关键作用。所使用的凝胶中官能团的高反应性可以缩短它们的凝胶化时间。所使用的长刚性链、它们的分层组件和对比的多网络受益于机械能的有效耗散和其操作稳定性的增强。强的超分子相互作用使水凝胶前体具有高粘度，因此通过挤出3D打印提供了良好的可控性来设计高分辨率和复杂的坚韧水凝胶结构。预计这种简单的制造策略和发现将为含NPS的材料开辟新的视野。
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)(3)(2+)-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.