PMID- 33949152 OWN - NLM STAT- MEDLINE DCOM- 20210622 LR - 20210622 IS - 2192-2659 (Electronic) IS - 2192-2640 (Linking) VI - 10 IP - 11 DP - 2021 Jun TI - 3D Printing Unique Nanoclay-Incorporated Double-Network Hydrogels for Construction of Complex Tissue Engineering Scaffolds. PG - e2100036 LID - 10.1002/adhm.202100036 [doi] AB - The development of new biomaterial inks with good structural formability and mechanical strength is critical to the fabrication of 3D tissue engineering scaffolds. For extrusion-based 3D printing, the resulting 3D constructs are essentially a sequential assembly of 1D filaments into 3D constructs. Inspired by this process, this paper reports the recent study on 3D printing of nanoclay-incorporated double-network (NIDN) hydrogels for the fabrication of 1D filaments and 3D constructs without extra assistance of support bath. The frequently used "house-of-cards" architectures formed by nanoclay are disintegrated in the NIDN hydrogels. However, nanoclay can act as physical crosslinkers to interact with polymer chains of methacrylated hyaluronic acid (HAMA) and alginate (Alg), which endows the hydrogel precursors with good structural formability. Various straight filaments, spring-like loops, and complex 3D constructs with high shape-fidelity and good mechanical strength are fabricated successfully. In addition, the NIDN hydrogel system can easily be transformed into a new type of magnetic responsive hydrogel used for 3D printing. The NIDN hydrogels also supported the growth of bone marrow mesenchymal stem cells and displayed potential calvarial defect repair functions. CI - (c) 2021 Wiley-VCH GmbH. FAU - Guo, Zhongwei AU - Guo Z AD - Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China. AD - Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen, 518055, China. FAU - Dong, Lina AU - Dong L AD - Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen, 518055, China. FAU - Xia, Jingjing AU - Xia J AD - Department of Mechanical Engineering and Mechanics, Tsinghua University, Beijing, 100084, China. FAU - Mi, Shengli AU - Mi S AD - Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China. FAU - Sun, Wei AU - Sun W AUID- ORCID: 0000-0002-3370-2098 AD - Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China. AD - Precision Medicine and Healthcare Research Center, Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen, 518055, China. AD - Department of Mechanical Engineering and Mechanics, Tsinghua University, Beijing, 100084, China. AD - Department of Mechanical Engineering, Drexel University, Philadelphia, PA, 19104, United States. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20210505 PL - Germany TA - Adv Healthc Mater JT - Advanced healthcare materials JID - 101581613 RN - 0 (Hydrogels) SB - IM MH - *Bioprinting MH - Hydrogels MH - Printing, Three-Dimensional MH - *Tissue Engineering MH - Tissue Scaffolds OTO - NOTNLM OT - 3D printing OT - double-network hydrogels OT - nanoclays OT - nanocomposite hydrogels OT - tissue engineering scaffolds EDAT- 2021/05/06 06:00 MHDA- 2021/06/23 06:00 CRDT- 2021/05/05 06:55 PHST- 2021/03/26 00:00 [revised] PHST- 2021/01/07 00:00 [received] PHST- 2021/05/06 06:00 [pubmed] PHST- 2021/06/23 06:00 [medline] PHST- 2021/05/05 06:55 [entrez] AID - 10.1002/adhm.202100036 [doi] PST - ppublish SO - Adv Healthc Mater. 2021 Jun;10(11):e2100036. doi: 10.1002/adhm.202100036. Epub 2021 May 5.