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High Pressure Laminates with Antimicrobial Properties.

Sandra Magina1, Mauro D Santos2, João Ferra3

  • 1CICECO-Aveiro Institute of Materials and Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal. smagina@ua.pt.

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Summary
This summary is machine-generated.

Researchers developed antimicrobial high-pressure laminates (HPLs) by adding polyhexamethylene biguanide (PHMB) to melamine-formaldehyde (MF) resin. Lower PHMB concentrations inhibited bacterial growth, while higher concentrations killed bacteria, maintaining HPL quality.

Keywords:
PHMBantimicrobialbactericidalbacteriostatichigh pressure laminatesmelamine-formaldehyde resinsurface

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Antimicrobial Technology

Background:

  • High-pressure laminates (HPLs) are widely used decorative composite materials valued for durability and cost-effectiveness.
  • There is a growing demand for HPLs with enhanced functionalities, such as antimicrobial properties, to meet specific market needs.
  • Incorporating antimicrobial agents into HPLs without compromising their structural integrity is a key challenge.

Purpose of the Study:

  • To develop novel antimicrobial high-pressure laminates (HPLs) by integrating polyhexamethylene biguanide (PHMB) into the melamine-formaldehyde (MF) resin matrix.
  • To chemically confirm the binding of PHMB within the MF resin on the HPL surface.
  • To evaluate the antimicrobial efficacy of the modified HPLs against representative gram-positive and gram-negative bacteria.

Main Methods:

  • Polyhexamethylene biguanide (PHMB) was incorporated into the melamine-formaldehyde (MF) resin used for the outer layer of HPLs.
  • Attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) was employed to verify the chemical integration of PHMB into the resin matrix.
  • Antimicrobial activity tests were conducted using *Listeria innocua* (gram-positive) and *Escherichia coli* (gram-negative) bacteria.

Main Results:

  • Chemical binding of PHMB within the MF resin on the HPL surface was confirmed by ATR-FTIR.
  • HPLs containing 1.0 wt % PHMB in the MF resin demonstrated bacteriostatic effects, inhibiting bacterial growth.
  • HPLs with 2.4 wt % PHMB in the MF resin exhibited bactericidal activity, effectively inactivating bacteria.
  • The addition of PHMB did not adversely affect the intrinsic quality parameters of the HPLs.

Conclusions:

  • The incorporation of PHMB into MF resin is a viable strategy for creating HPLs with antimicrobial properties.
  • Tailoring PHMB concentration allows for control over antimicrobial activity, ranging from bacteriostatic to bactericidal.
  • This research presents a promising method for producing functionalized HPLs suitable for various applications requiring enhanced hygiene and durability.