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The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...

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Preparation of Thermoresponsive Nanostructured Surfaces for Tissue Engineering
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Published on: March 1, 2016

Modification of polystyrene surface in aqueous solutions.

J A Mielczarski1, Y L Jeyachandran, E Mielczarski

  • 1LEM, Nancy-Université, CNRS, 15 Avenue du Charmois, B.P. 40, F-54501 Vandœuvre lès Nancy, France. jerzy.mielczarski@ensg.inpl-nancy.fr

Journal of Colloid and Interface Science
|August 2, 2011
PubMed
Summary

Phosphate buffered saline (PBS) effectively modifies polystyrene (PS) surfaces through a wet process, creating stable changes suitable for biomedical applications.

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Area of Science:

  • Polymer Science
  • Surface Chemistry
  • Biomaterials Science

Background:

  • Polystyrene (PS) is a widely used polymer with applications in biomedical fields.
  • Surface modification of PS is crucial for enhancing its performance and biocompatibility.
  • Existing dry modification methods like plasma treatment have limitations.

Purpose of the Study:

  • To investigate the surface modification of polystyrene (PS) using phosphate buffered saline (PBS) under ambient conditions.
  • To compare the efficacy of PBS treatment with solutions of its individual ionic constituents.
  • To elucidate the mechanism of wet surface modification and its stability.

Main Methods:

  • Attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) for chemical and structural analysis.
  • Ultraviolet-visible (UV-Vis) spectroscopy for characterizing surface modifications.
  • Treatment of PS films with PBS and its constituent solutions.

Main Results:

  • PBS treatment induced significant chemical and structural modifications on PS surfaces.
  • PBS was more effective than individual ionic solutions in modifying PS.
  • The wet modification mechanism involves photo-oxidation/reduction, swelling, and polymer chain rearrangement.
  • PBS-induced modifications were more stable than those from dry processes.
  • Surface modification could be controlled by pre-treatment of PS (e.g., annealing, protein adsorption).

Conclusions:

  • Phosphate buffered saline (PBS) offers a simple, efficient, and stable method for polystyrene (PS) surface modification.
  • This wet approach yields surface properties comparable to dry methods but with enhanced stability.
  • The controlled surface modifications are promising for various biomedical applications of PS.