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The position of the absorption signal of a sample is reported relative to the position of the signal of tetramethylsilane (TMS), which is added as an internal reference while recording spectra. The difference between the absorption frequencies of the sample and TMS (in Hz) is divided by the spectrometer operating frequency (in MHz) to obtain a dimensionless quantity called the chemical shift. It is reported on the δ (delta) scale and expressed in parts per million.
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In an NMR sample, precise measurement of the absolute absorption frequencies of nuclei is difficult. A standard internal reference compound is added, and the frequency difference between the reference signal and sample signals is measured.
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Encapsulation of Cardiomyocytes in a Fibrin Hydrogel for Cardiac Tissue Engineering
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Self-Healing Hydrogels: The Next Paradigm Shift in Tissue Engineering?

Sepehr Talebian1,2, Mehdi Mehrali3, Nayere Taebnia3

  • 1Intelligent Polymer Research Institute ARC Centre of Excellence for Electromaterials Science AIIM Facility University of Wollongong NSW 2522 Australia.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|August 28, 2019
PubMed
Summary

Self-healable hydrogels offer durable, stable alternatives to brittle ones. Incorporating nanomaterials into double-network hydrogels enhances toughness and self-healing for tissue engineering.

Keywords:
cyborganicsnanocomposite hydrogelsnanomaterialsself‐healing hydrogelstissue engineering

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Polymer Science

Background:

  • Self-healable hydrogels are emerging as advanced replacements for brittle hydrogels in biomedical applications due to their durability and stability.
  • A key challenge is the incompatibility between hydrogel toughness and rapid self-healing, limiting their use in dynamic physiological environments.
  • Meeting diverse tissue-specific requirements, including electrical, biological, and mechanical properties, is crucial for effective tissue engineering.

Purpose of the Study:

  • To review recent advancements in multifunctional and self-healable hydrogels for tissue engineering.
  • To highlight the potential of incorporating nanomaterials into double-network hydrogels for improved properties.
  • To discuss emerging applications in bioelectronic hydrogels, cyborganics, and soft robotics.

Main Methods:

  • Review of recent scientific literature on self-healable hydrogels and nanomaterial incorporation.
  • Analysis of strategies for enhancing hydrogel toughness and self-healing capabilities.
  • Exploration of property tuning for specific tissue engineering applications.

Main Results:

  • Nanomaterial incorporation into double-network hydrogels shows significant promise for creating robust, self-healable materials.
  • Multifunctional hydrogels can be engineered to meet diverse tissue-specific property requirements.
  • These advanced hydrogels are suitable for demanding applications like bioelectronics, cyborganics, and soft robotics.

Conclusions:

  • Self-healable hydrogels, particularly those enhanced with nanomaterials, represent a significant breakthrough in tissue engineering.
  • Addressing the toughness-self-healing trade-off is key to their successful clinical translation.
  • The development of these materials opens new avenues for advanced biomedical devices and regenerative medicine.