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Related Concept Videos

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Adaptability of Cytoskeletal Filaments

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The cytoskeleton is a complex dynamic structure performing varied functions based on cellular requirements. The adaptability of the individual filaments in the cytoskeleton determines their ability to perform various functions within the cell. It can undergo rapid reorganization during processes like cell division or remain stable for several hours as in the interphase. The adaptability of these filaments depends on stringent regulatory mechanisms. The microfilament and microtubules of the...
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Fibril-associated collagens are a type of collagens present in the extracellular matrix with interrupted triple helices or FACIT (Fibril-associated collagens interrupted triple-helices). FACIT help connect and attach the collagen fibrils with each other as well as with other proteins of the extracellular matrix.
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Fibrous proteins are either long and narrow proteins or assemble to form long and thin structures. They contain repetitive units and usually consist of either alpha helices or beta sheets and, in rare cases, a mix of both. The amino acids in the primary structure often consist of repeating amino acid sequences. The role of fibrous proteins is primarily structural. Many are located in the extracellular matrix and are present in connective tissues to impart strength and joint mobility. They are...
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The cytoskeleton is an essential cell component that plays several structural and functional roles. However, the filaments that make up the cytoskeleton cannot function independently and depend on the accessory or ancillary proteins to effectively carry out their function. Accessory proteins associate with cytoskeletal filaments and their monomers, aiding filament formation and function. They also help in the cross-communication among cytoskeletal filaments. Cytoskeletal accessory proteins are...
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Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
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Related Experiment Video

Updated: Aug 2, 2025

Preparation of DNA-crosslinked Polyacrylamide Hydrogels
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Adaptable covalently cross-linked fibers.

Hui Tan1, Luzhi Zhang1,2, Xiaopeng Ma1

  • 1Respiratory Department, Shenzhen Children's Hospital, 518038, Shenzhen, China.

Nature Communications
|April 18, 2023
PubMed
Summary

Researchers developed adaptable covalently cross-linked fibers using melt spinning of covalent adaptable networks (CANs). This innovative method overcomes challenges in fabricating robust, solvent-resistant fibers for advanced applications.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Textile Engineering

Background:

  • Fibers are produced annually in large quantities, with ongoing research focused on enhancing their mechanical properties and chemical resistance through covalent cross-linking.
  • Conventional covalently cross-linked polymers present fabrication challenges due to their inherent insolubility and infusibility, often necessitating complex, multi-step preparation processes.

Purpose of the Study:

  • To introduce a facile and effective strategy for preparing adaptable covalently cross-linked fibers.
  • To enable fiber fabrication via direct melt spinning of covalent adaptable networks (CANs).

Main Methods:

  • Utilized covalent adaptable networks (CANs) that exhibit reversible dynamic covalent bonding.
  • Employed direct melt spinning, leveraging the temporary dissociation of dynamic covalent bonds at elevated processing temperatures.
  • Demonstrated the strategy using dynamic oxime-urethane based CANs.

Main Results:

  • Successfully prepared adaptable covalently cross-linked fibers with exceptional mechanical properties, including a maximum elongation of 2639% and tensile strength of 87.68 MPa.
  • Achieved nearly complete recovery from 800% elongation, indicating robust elasticity and resilience.
  • Demonstrated excellent solvent resistance and developed a stretchable, conductive fiber resistant to organic solvents.

Conclusions:

  • The direct melt spinning of CANs provides an efficient and adaptable method for fabricating advanced covalently cross-linked fibers.
  • This approach overcomes traditional limitations, enabling the production of high-performance fibers with tunable properties.
  • The developed technology holds promise for applications requiring robust, solvent-resistant, and stretchable conductive materials.