Summary
- Profile Type
- Technology offer
- POD Reference
- TORO20230428004
- Term of Validity
- 28 August 2023 - 27 August 2025
- Company's Country
- Romania
- Type of partnership
- Research and development cooperation agreement
- Targeted Countries
- All countries
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General information
- Short Summary
- The technology for obtaining antibacterial and antifungal compositions based on cellulose derivatives and silver nanoparticles for the treatment of documents damaged by microorganisms. Gels based on cellulose derivatives with silver nanoparticles dispersed in isopropyl alcohol will form micronized cellulose films after drying with increased resistance against molds and bacterial attacks. The application is carried out directly by an easy method.
- Full Description
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Improper storage conditions for books or various documents on cellulosic support can generate the development of bacteria, fungi or molds on their surface. The growth and multiplication of these pathogens leads to the production of digestive enzymes that alter and weaken the structure of the organic support, leading to the appearance of stains or even more severe degradation. The spores released by these pathogenic species also pose an important risk to human health. At the moment, the possibilities of restoring documents affected by bacteria, fungi and molds are based on the addition of Japanese paper (2 g/m2 with a thickness of 0.02 mm). This is used as a filling material or to repair tears, but at the same time it can be added in a compact layer over an inscription to protect it, at this thickness the material is transparent. However, this type of paper has no antimicrobial activity and can be damaged over time, also the thickness cannot be reduced more than 0.02 mm nor can it be placed under the letters in case of damage to the original support.
The gel with cellulose derivatives, with silver nanoparticles, through rapid drying, forms a cellulose film that will repair damaged areas (ruptures, holes with missing material, etc.). The gel can also be inserted under the letters that have detached from the original support following the degradation of the cellulosic material. By drying quickly, it will act like a real glue, but having the same composition, based on cellulose. Since the composition contains silver nanoparticles, the cellulosic film left after drying has antimicrobial activity and no longer allows the development of microorganisms on the treated area. If desired, the gel can be applied evenly over the entire page, after drying, forming a protective film over the writing, with antimicrobial activity, which will practically seal and protect the entire document. - Advantages and Innovations
- The advantages of the gel based on cellulose derivatives, with silver nanoparticles, consists in the synergistic, complex activity of antimicrobial agents, trigonal Ag nanoparticles, stabilized with biocompatible polymers, glycerin and isopropyl alcohol, as well as in the fact that an antibacterial activity can be ensured and lasting antifungal after restoration. Through multiple applications, the thickness of the antibacterial cellulosic film can be obtained from a few hundred nanometers to a few microns. It is also very important that, being a solution in the form of a gel, it allows the individual treatment of various affected areas, regardless of size (ruptures, holes, missing areas, but also regluing the letters to the cellulosic support), depending on the needs. The silver nanoparticles stabilized with biocompatible PVP or PEG polymers will adhere to the cellulosic fibers and will remain both on the surface of the inscription and in the mass of the cellulosic support and will ensure a long-lasting antibacterial and antifungal activity. The chemical binding of silver nanoparticles will ensure a prolonged antimicrobial activity and, moreover, the release of silver ions or nanoparticles into the environment will be lower, so the negative implications on the environment will be reduced.
- Stage of Development
- Lab tested
- Sustainable Development Goals
- Goal 3: Good Health and Well-being
- IPR status
- IPR granted
- IPR notes
- RO135842(A2)
Partner Sought
- Expected Role of a Partner
- Capitalizing on the technology obtained through a license contract granted to an interested economic partner, with the possibility of continuing a collaboration based on a research contract, to increase the TRL level of the technology from the level of the current development phase (TRL 3).
- Type and Size of Partner
- University
- SME 11-49
- R&D Institution
- SME 50 - 249
- Type of partnership
- Research and development cooperation agreement
Dissemination
- Technology keywords
- 02007013 - Paper technology
- Market keywords
- 08001023 - Other chemicals and materials (not elsewhere classified)
- 08001015 - Other speciality materials
- Targeted countries
- All countries