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Frontiers Research of Cavitation on Extended Surfaces

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (20 October 2022) | Viewed by 1451

Special Issue Editor

Institut de Chimie Séparative de Marcoule, Université de Montpellier, 34090 Montpellier, France
Interests: sonochemistry; actinides; colloids; oxides; dissolution

Special Issue Information

Dear Colleagues,

Cavitation deals with the nucleation, growth, and rapid implosive collapse of gas and vapor-filled microbubbles in a liquid subjected to depression. This phenomenon has different origins, including, for instance, acoustic, hydrodynamic, and optical cavitation. While cavitation can generate unwanted harmful conditions in some cases (e.g., hydraulic machineries), the extreme conditions generated at collapse may offer a potentially interesting alternative for surface treatment while providing specific chemical and/or physical effects. Examples taken from recent literature indeed describe the use of cavitation for the fragmentation and erosion of solids, dissolution of refractory materials, depassivation of metallic surfaces, functionalization of material surfaces, decontamination or structuring of materials, cleaning and disinfection of surfaces, etc. This Special Issue aims at gathering recent advances dealing with cavitation-induced surface treatment from the fundamental exploration of the mechanisms involved at the interface to surface manipulation, including interesting applications and innovations. This edition also aims to bring together different communities that do not often interact in order to help new research ideas and directions around the effect of cavitation at the solid/liquid interface to flourish.

Dr. Matthieu Virot
Guest Editor

Manuscript Submission Information

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Keywords

  • ultrasound
  • sonochemistry
  • hydrodynamic cavitation
  • laser cavitation
  • interface
  • materials
  • surface treatment

Published Papers (1 paper)

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Research

12 pages, 5447 KiB  
Article
Microbubbles Remove Listeria monocytogenes from the Surface of Stainless Steel, Cucumber, and Avocado
by Pengyu Chen, Joseph Eifert, Sunghwan Jung, Laura K. Strawn and Haofu Li
Materials 2022, 15(22), 8203; https://doi.org/10.3390/ma15228203 - 18 Nov 2022
Viewed by 1046
Abstract
Fresh produce may be contaminated by bacterial pathogens, including Listeria monocytogenes, during harvesting, packaging, or transporting. A low-intensity cavitation process with air being injected into water was studied to determine the microbubbles’ efficiency when detaching L. monocytogenes from stainless steel and the surface [...] Read more.
Fresh produce may be contaminated by bacterial pathogens, including Listeria monocytogenes, during harvesting, packaging, or transporting. A low-intensity cavitation process with air being injected into water was studied to determine the microbubbles’ efficiency when detaching L. monocytogenes from stainless steel and the surface of fresh cucumber and avocado. Stainless steel coupons (1″ × 2″), cucumber, and avocado surfaces were inoculated with L. monocytogenes (LCDC strain). After 1, 24 or 48 h, loosely attached cells were washed off, and inoculated areas were targeted by microbubbles (~0.1–0.5 mm dia.) through a bubble diffuser (1.0 L air/min) for 1, 2, 5, or 10 min. For steel, L. monocytogenes (48 h drying) detachment peaked at 2.95 mean log reduction after 10 min of microbubbles when compared to a no-bubble treatment. After 48 h pathogen drying, cucumbers treated for 10 min showed a 1.78 mean log reduction of L. monocytogenes. For avocados, L. monocytogenes (24 h drying) detachment peaked at 1.65 log reduction after 10 min of microbubbles. Microbubble applications may be an effective, economical, and environmentally friendly way to remove L. monocytogenes, and possibly other bacterial pathogens, from food contact surfaces and the surfaces of whole, intact fresh produce. Full article
(This article belongs to the Special Issue Frontiers Research of Cavitation on Extended Surfaces)
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