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Shao C, Meng L, Wang M, Cui C, Wang B, Han CR, Xu F, Yang J. Mimicking Dynamic Adhesiveness and Strain-Stiffening Behavior of Biological Tissues in Tough and Self-Healable Cellulose Nanocomposite Hydrogels. ACS Appl Mater Interfaces 2019; 11:5885-5895. [PMID: 30652853 DOI: 10.1021/acsami.8b21588] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Although self-healing gels with structural resemblance to biological tissues attract great attention in biomedical fields, it remains a dilemma for combination between fast self-healing properties and high mechanical toughness. On the basis of the design of dynamic reversible cross-links, we incorporate rigid tannic acid-coated cellulose nanocrystal (TA@CNC) motifs into the poly(vinyl alcohol) (PVA)-borax dynamic networks for the fabrication of a high toughness and rapidly self-healing nanocomposite (NC) hydrogel, together with dynamically adhesive and strain-stiffening properties that are particularly indispensable for practical applications in soft tissue substitutes. The results demonstrate that the obtained NC gels present a highly interconnected network, where flexible PVA chains wrap onto the rigid TA@CNC motifs and form the dynamic TA@CNC-PVA clusters associated by hydrogen bonds, affording the critical mechanical toughness. The synergetic interactions between borate-diol bonds and hydrogen bonds impart a typical self-healing behavior into the NC gels, allowing the dynamic cross-linked networks to undergo fast rearrangement in the time scale of seconds. Moreover, the obtained NC hydrogels not only mimic the main feature of biological tissues with the unique strain-stiffening behavior but also display unique dynamic adhesiveness to nonporous and porous substrates. It is expected that this versatile approach opens up a new prospect for the rational design of multifunctional cellulosic hydrogels with remarkable performance to expand their applications.
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Affiliation(s)
- Changyou Shao
- Beijing Key Laboratory of Lignocellulosic Chemistry , Beijing Forestry University , No 35, Tsinghua East Road , Haidian District, Beijing 100083 , China
| | - Lei Meng
- Beijing Key Laboratory of Lignocellulosic Chemistry , Beijing Forestry University , No 35, Tsinghua East Road , Haidian District, Beijing 100083 , China
| | - Meng Wang
- Beijing Key Laboratory of Lignocellulosic Chemistry , Beijing Forestry University , No 35, Tsinghua East Road , Haidian District, Beijing 100083 , China
| | - Chen Cui
- Beijing Key Laboratory of Lignocellulosic Chemistry , Beijing Forestry University , No 35, Tsinghua East Road , Haidian District, Beijing 100083 , China
| | - Bo Wang
- Beijing Key Laboratory of Lignocellulosic Chemistry , Beijing Forestry University , No 35, Tsinghua East Road , Haidian District, Beijing 100083 , China
| | - Chun-Rui Han
- Beijing Key Laboratory of Lignocellulosic Chemistry , Beijing Forestry University , No 35, Tsinghua East Road , Haidian District, Beijing 100083 , China
| | - Feng Xu
- Beijing Key Laboratory of Lignocellulosic Chemistry , Beijing Forestry University , No 35, Tsinghua East Road , Haidian District, Beijing 100083 , China
| | - Jun Yang
- Beijing Key Laboratory of Lignocellulosic Chemistry , Beijing Forestry University , No 35, Tsinghua East Road , Haidian District, Beijing 100083 , China
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