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Writing and Low-Temperature Characterization of Oxide Nanostructures
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Nanostructured Polymethylsiloxane/Fumed Silica Blends.

Iryna Protsak1,2, Volodymyr M Gun'ko3, Volodymyr V Turov3

  • 1College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.

Materials (Basel, Switzerland)
|July 31, 2019
PubMed
Summary

Polymethylsiloxane (PMS) and fumed silica blends can be effectively homogenized using controlled water addition and mechanical stirring. This process optimizes pore structure for applications like medical sorbents and drug carriers.

Keywords:
hydration effectinterfacial layer structuremechanical loading effectpolymethylsiloxane/nanosilica blendstextural characteristics

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Polymethylsiloxane (PMS) and fumed silica are key components in advanced materials.
  • Understanding their blend morphology and textural properties is crucial for applications.
  • Existing methods may not sufficiently control the nanostructure of these composites.

Purpose of the Study:

  • To investigate the effects of hydration and mechanical treatment on PMS/fumed silica blends.
  • To characterize the morphological and textural changes induced by these treatments.
  • To explore the potential of these materials as medical sorbents and drug carriers.

Main Methods:

  • Utilized Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) for morphology.
  • Employed nitrogen adsorption-desorption for textural analysis.
  • Applied 1H MAS and 29Si CP/MAS NMR, infrared spectroscopy, and quantum chemistry methods.

Main Results:

  • Both dry and wetted PMS can graft onto silica surfaces, enhanced by mechanical loading.
  • Mechanical loading improves blend homogenization, evidenced by nonadditive textural changes.
  • PMS/nanosilica blends exhibit meso/microporosity with pore radii > 10 nm, suitable for medical applications.

Conclusions:

  • A technique involving controlled water addition and mechanical loading significantly alters blend characteristics.
  • This method enables tunable morphological and textural properties of fumed silica, PMS, and their blends.
  • The developed approach offers practical advantages for creating advanced materials for biomedical uses.