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Bioplastics01:27

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Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
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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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Related Experiment Video

Updated: Jul 15, 2026

Fabricating Reactive Surfaces with Brush-like and Crosslinked Films of Azlactone-Functionalized Block Co-Polymers
10:09

Fabricating Reactive Surfaces with Brush-like and Crosslinked Films of Azlactone-Functionalized Block Co-Polymers

Published on: June 30, 2018

Regenerable Biocidal Surfaces Enabled by Self-Assembled Block Copolymer Polyelectrolytes.

Theodore Manouras1,2, Apostolos Vagias3,4, Eleftherios Koufakis1,2

  • 1Department of Materials Science and Engineering, University of Crete, 700 13 Heraklion, Crete, Greece.

ACS Applied Materials & Interfaces
|July 14, 2026
PubMed
Summary

Researchers developed novel antibacterial surfaces using self-assembling copolymers. These surfaces kill bacteria on contact and can be renewed through controlled hydrolysis, offering long-term antimicrobial protection and reusability.

Keywords:
X-ray reflectivitybiocidal surfacesgrazing incidence small angle X-ray scatteringmicrophase separationpolyelectrolyte block copolymersrenewable surfaces

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High-throughput Identification of Bacteria Repellent Polymers for Medical Devices

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High-throughput Identification of Bacteria Repellent Polymers for Medical Devices
10:43

High-throughput Identification of Bacteria Repellent Polymers for Medical Devices

Published on: November 5, 2016

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Surface Science

Background:

  • Developing reusable antibacterial surfaces is crucial for infection control.
  • Existing strategies often lack long-term efficacy or reusability.

Purpose of the Study:

  • To create novel antibacterial surfaces with contact-killing and controlled-release properties.
  • To investigate the self-assembly and long-term performance of these surfaces.

Main Methods:

  • Synthesis of amphiphilic diblock copolymers (PQDMAEMA-b-PTHPMA) via group transfer polymerization.
  • Thin film fabrication and solvent annealing for lamellar self-assembly.
  • Characterization using microscopy, X-ray reflectivity, and ellipsometry.
  • Antibacterial efficacy testing against Gram-positive and Gram-negative bacteria.

Main Results:

  • Successful synthesis and quaternization of diblock copolymers.
  • Formation of lamellar-organized thin films with outermost biocidal PQDMAEMA layers.
  • Demonstrated sustained antibacterial activity (∼2-log reduction) for 30 days in water.
  • Confirmed self-polishing and renewal mechanism via hydrolysis of the PTHPMA block.

Conclusions:

  • The developed PQDMAEMA-b-PTHPMA surfaces exhibit effective and durable antibacterial activity.
  • The kill-and-release mechanism enables long-term reusability and sustained antimicrobial performance.
  • This approach offers a promising strategy for advanced antibacterial surface applications.