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Universidade do Minho: RepositoriUM
Other literature type . 2022
License: CC BY
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Desinfetante multi-superfícies de longa duração: avaliação da eficácia e durabilidade

Long term multi-surface disinfectant: evaluation of efficiency and durability
Authors: Castro, Débora Francisca Baptista;

Desinfetante multi-superfícies de longa duração: avaliação da eficácia e durabilidade

Abstract

Nos últimos anos tem-se observado uma crescente preocupação com os hábitos de higiene, saúde e segurança por parte da sociedade. Adicionalmente, as infeções em setores como a saúde e a indústria alimentar, impuseram a necessidade do desenvolvimento de produtos que permitam conferir qualidade e segurança aos serviços e produtos disponíveis. Face a esta procura, a empresa Success Gadget desenvolveu um desinfetante antimicrobiano multi-superfícies de longa duração. Assim, este trabalho desenvolvido na referida empresa teve como objetivo principal a avaliação deste produto, quer em termos de composição, quer em termos de atividade antimicrobiana contra vários microrganismos e aplicada em diferentes superfícies. Numa primeira fase deste projeto, foram estudados os componentes da formulação e a estabilidade da mesma, quando submetida a ensaios de estabilidade acelerada. Relativamente aos componentes da formulação confirma-se a atividade antibacteriana por parte das substâncias ativas da formulação, o peróxido de hidrogénio e o etanol, para as três bactérias em estudo, Staphylococcus aureus, Klebsiella pneumoniae e Escherichia coli. Quanto à formulação em estudo, mostrou-se estável quando submetida a uma temperatura de 54 ºC durante 14 dias, sendo que no final do ensaio a percentagem de peróxido de hidrogénio teórico se encontra dentro do intervalo obtido experimentalmente. Quanto ao parâmetro da densidade este não sofreu alterações e no parâmetro do pH as alterações que ocorreram já eram esperadas. Na segunda fase do projeto, analisou-se a atividade antibacteriana de superfícies porosas, tendo sido testadas duas amostras têxteis, com diferentes características. O produto em estudo apresentou atividade antibacteriana para as duas amostras têxteis para tempos de desinfeção até 7 dias de aplicação, para S. aureus, K. pneumoniae e E. coli. A análise da atividade antibacteriana em superfícies não porosas, correspondendo à terceira fase do projeto, sendo testadas amostras de alumínio. O desinfetante apresenta atividade antibacteriana até 48 h para S. aureus, no caso da K. pneumoniae apresenta atividade antibacteriana até 7 dias e, por último, para E. coli não apresenta atividade antibacteriana. A última fase da dissertação contemplou a análise da atividade antimicrobiana em superfícies do quotidiano, sendo que ocorreu total inibição fúngica e uma diminuição notória de colonização bacteriana após 7 dias de aplicação de desinfetante. Em conclusão, o desinfetante em estudo é um produto promissor no que toca à inibição de microrganismos em superfícies com características diferentes entre si.

In recent years there has been a growing concern with hygiene, health and safety habits on part of society. Additionally, infections in sectors such as health and food industry have imposed the need to develop products that allow the assessment of quality and safety in the services and products available. Due to the demand, the company Success Gadget created an long term multi-surface disinfectant Therefore the work developed by the company, had the main goal to be the evaluation of the product in composition and in antimicrobial activity against the several microorganisms and applied in different surfaces. In the first phase of the project, the components of the formulation and theirstability were studied, been submitted to accelerated stability tests. Regarding the components of the formulation, the antibacterial activity of the active substances in the formulation, hydrogen peroxide and ethanol, is confirmed for the three bacteria (Staphylococcus aureus, Klebsiella pneumoniae and Escherichia coli) under study, it was stable when subjected to a temperature of 54 ºC for 14 days, and at the end of the test the theoretical percentage of hydrogen peroxide is within the range obtained experimentally. As for the density parameter, it did not undergo changes and the pH parameter, the changes that occurred were already expected. In the second stage of the project, the antibacterial activity of porous surface was analysed, two textile samples with different characteristics were tested. The product under study showed antibacterial activity for both textile samples for disinfection times up to 7 days of application, for S. aureus, K. pneumoniae and E. coli. On the analysis of antibacterial activity on non-porous surface, the third phase of the project, aluminium samples were tested. The disinfectant had antibacterial activity up to 48 h for S. aureus, in the case of K. pneumoniae it had antibacterial activity up to 7 days and, finally, for E. coli it had no antibacterial activity. The last phase of the work included the analysis of antimicrobial activity on everyday surfaces, with total fungal inhibition and notable decrease in bacteria colonization after 7 days of disinfectant application. In conclusion, the disinfectant under study is a promising product in terms of inhibiting microorganisms on surfaces with different characteristics.

Dissertação de mestrado integrado em Engenharia Biológica (especialização em Tecnologia Química e Alimentar)

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Portugal
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Keywords

Disinfectant, Ethanol, Etanol, Peróxido de hidrogénio, Desinfetante, Atividade antimicrobiana, Engenharia e Tecnologia::Outras Engenharias e Tecnologias, Antimicrobial activity, Hydrogen peroxide

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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