Heritage ethnographic objects – antimicrobial effects of chitosan treatment

Indrie, Liliana; Bonet-Aracil, Marilés; Ilieș, Dorina Camelia; Albu, Adina; Ilies, Gabriela; Herman, Grigore Vasile; Baias, Ștefan; Costea, Monica

doi:10.35530/it.072.03.1812

Cited by 6 publications

(3 citation statements)

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“…Given that the museum is full of bacteriological microflora both in the air and on exhibits, this being a factor that contributes decisively to the deterioration of items over time and also having potential harmful effects on human health, non-invasive and nondestructive solutions must be found for cleaning and prevention [97][98][99][100].…”

Section: Bacteriamentioning

confidence: 99%

Museal Indoor Air Quality and Public Health: An Integrated Approach for Exhibits Preservation and Ensuring Human Health

et al. 2022

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The quality of the indoor microclimate in museums is a problem of great interest to the contemporary society, given that it is in close connection with the health and comfort of visitors and employees, as well as with the integrity of the exhibits. Taking into account the fact that museums are places that have a special role in the community’s life and therefore attract a very large number of visitors of all ages, a very important issue is to determine the degree of safety that the indoor microclimate presents. Thus, the quality of the indoor microclimate was investigated inside an iconic museum in Romania, dating back to the 19th century, because pollutants from external or internal sources of the building, generated secondary, often anthropogenic, as a tendency to defend/adapt to climate change (CC), contribute to both local and regional pollution, but also lead to challenges in identifying links between air quality (AQ) and and climate change (CC). The methodology used was based on monitoring the main parameters of the microclimate (temperature, relative humidity and CO2) over a period of between October 2020 and March 2021, 21 weeks, as well as on determining the microbiological contamination of the air and some indoor exhibits located in three different areas of the museum. At the same time, the study aims to identify cheap, easy to implement and non-invasive solutions for removing fungi identified on exhibits for long-term preservation and reducing the risk of various pathologies in humans following prolonged exposure. The results obtained show that the indoor microclimate in the old heritage building favours the development of fungi, which have a high degree of contamination of the air (over 800 CFU/m3) and of the exhibits, representing a potential risk for the health of the visitors and museum workers. Thus, six species of yeast and five different fungi genera were identified in the air, while on the exhibits were individualised six fungi genera, a species of yeast and a bacterium. The most viable solution for cleaning materials, prolonging their lifespan and reducing the risk of disease in humans was represented by the use of essential oils (EO). Three essential oils (lavender, mint and lemon) were applied on an exhibit with five different microorganism genera, and it was observed that they have the ability to inhibit the spores from moulds and bacteria, being a very good alternative to the usual chemical treatments that are used in the cultural heritage field.

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Section: Bacteriamentioning

confidence: 99%

Museal Indoor Air Quality and Public Health: An Integrated Approach for Exhibits Preservation and Ensuring Human Health

et al. 2022

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“…Xin Wang et al successfully designed and developed a controlled release-system against microorganisms based on thymol-loaded chitosan nanoparticles, demonstrating that it is possible to obtain natural biocides as a viable alternative to the toxic products currently in use for the same purpose [28]. Another example of the application of chitosan based on its physical and antimicrobial characteristics is the treatment of ethnographic objects (made of cotton and linen) by L. Indrie et al [29]. Notwithstanding this potential for threating several types of cultural heritage, however, chitosan has not been tested yet on frescoes to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

A New Green Coating for the Protection of Frescoes: From the Synthesis to the Performances Evaluation

et al. 2023

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This work presents the formulation and characterization of a new product for the protection of outdoor frescoes from aggressive environmental agents. The formulation is designed as an innovative green coating, prepared through a zero-waste one-pot-synthetic method to form silver nanoparticles (AgNPs) directly in a chitosan-based medium. The AgNPs are seeded and grown in a mixed hydrogel of chitosan, azelaic, and lactic acid, by the reduction of silver nitrate, and using calcium hydroxide as precipitating agent. The rheological properties of this coating base are optimized by the addition of a solvent mixture of glycerol and ethanol with a 1:1 volume ratio. The new formulation and two commercial products (Paraloid® B72 and Proconsol®) are then applied by brush to ad hoc mock-ups to be evaluated for chemical stability, color and gloss variations, morphological variation, hydrophobicity, and water vapor permeability via Fourier-transform infrared spectroscopy (FT-IR) in attenuated total reflection (ATR) mode, spectrophotometer analysis, stereomicroscope observations, UNI EN 15802, and UNI EN 15803, respectively. The results show that the application of the hybrid chitosan-AgNPs coating is promising for the protection of outdoor frescoes and that it can underpin the development of new products that address the lack of conservation strategies specifically designed for wall painting.

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“…The utilization of essential oils as disinfecting agents to preserve and maintain textiles and fabrics made from natural fibers has been suggested by some researchers because of their antibacterial and antiviral properties [29][30][31][32][33][34][35][36]. In this connection, conservators traditionally used thymol vapor as a homemade disinfectant [37].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Morphological Properties of Cellulosic Fabrics Treated with Microencapsulated Essential Oils

et al. 2022

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This study focused on the mechanical and morphological properties of lignocellulosic heritage textiles (cotton and hemp) made using eco-friendly salvia and thyme microencapsulated essential oils, characterized by low toxicity for humans and the environment. A morphological evaluation of the tested fabrics was performed using scanning electron microscopy. The ATR–FTIR spectra of the untreated and treated fabric samples were tested using Perkin Elmer, Spectrum 3. A tensile test of the samples was conducted based on the ISO 13934-1 using a MESDAN-Lab tensile strength tester. According to the analysis, the salvia improved the tensile strength of the fabric by 20% and 39% in the warp and weft directions, respectively. The data for the untreated cotton, untreated hemp, and fabrics treated with salvia and thyme were processed using the kernel PCA method. From the principal component analysis it was found that the textile fabrics treated with salvia coalesced close to the untreated ones. This shows that treatment with essential oils from the indicated plant does not significantly affect the tensile properties of textile fabrics. The thymol-treated textile fabrics were significantly distant from those of the control sample. In cotton textile fabrics, thymol treatment was found to have a significant effect on their tensile properties. In hemp fabrics, two types of thymol and salvia treatments were found to have a very significant effect on the tensile strength performance of the textile fabrics. The results obtained can be used in museums, universities, and ethnographic studies that own or maintain collections of heritage textiles.

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Heritage ethnographic objects – antimicrobial effects of chitosan treatment

Cited by 6 publications

References 0 publications

Museal Indoor Air Quality and Public Health: An Integrated Approach for Exhibits Preservation and Ensuring Human Health

Museal Indoor Air Quality and Public Health: An Integrated Approach for Exhibits Preservation and Ensuring Human Health

A New Green Coating for the Protection of Frescoes: From the Synthesis to the Performances Evaluation

Mechanical and Morphological Properties of Cellulosic Fabrics Treated with Microencapsulated Essential Oils

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