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Clay nanotube encapsulation for functional biocomposites.

Yuri Lvov1, Artem Aerov2, Rawil Fakhrullin3

  • 1Institute for Micromanufacturing, Louisiana Tech University, Ruston, LA, USA.

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Summary

Natural halloysite clay nanotubes serve as miniature drug delivery vehicles, offering tunable sustained release from 10 to 200 hours. These biocompatible nanotubes also enhance microbial properties and form functional biocomposites.

Keywords:
DrugsEnzymesHalloysite clay nanotubesMicrobial shellsNanosafetySustained release

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomedical Engineering

Background:

  • Halloysite clay nanotubes are biocompatible ceramic materials.
  • Their nanoscale dimensions (50 nm outer, 15 nm inner diameter) offer unique properties.
  • Natural halloysite is abundant, non-toxic, and requires minimal processing.

Purpose of the Study:

  • To explore halloysite nanotubes as miniature vehicles for sustained drug and protein release.
  • To investigate the potential of halloysite nanotubes in creating functional biocomposites and nanoshells.
  • To understand the mechanisms controlling drug release kinetics.

Main Methods:

  • Surface modification of halloysite nanotubes with polymeric coatings to control release rates.
  • Incorporation of halloysite nanotubes into polar and low-polar polymers to create biocomposites.
  • Investigating the electrostatic interactions for nanoshell construction on microbes.

Main Results:

  • Sustained release of drugs and proteins from halloysite nanotubes achieved, with release times tunable from 10 to 200 hours.
  • Halloysite nanotubes demonstrate excellent miscibility with various polymers, enhancing mechanical strength and adhesivity of biocomposites.
  • A mechanism involving locking electrical potential at nanotube ends is proposed for sustained release.

Conclusions:

  • Halloysite nanotubes are versatile, biocompatible nanocarriers for controlled drug delivery.
  • They can be utilized to create advanced functional biocomposites and enhance biological cells.
  • The natural abundance and ease of processing make halloysite nanotubes a sustainable and cost-effective nanomaterial.