Journal
MATERIALS TODAY COMMUNICATIONS
Volume 31, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mtcomm.2022.103662
Keywords
Bio-based epoxy-silica hybrids; Stone conservation; Nanotechnology
Categories
Funding
- Spanish Ministry of Economy, Industry and Competitiveness (MINECO) [CTQ2017-82761-P]
- European Regional Development Fund (FEDER)
- University of Basque Country
- MINECO [PRE2018-085888]
- Basque Country Government [IT-742-13]
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This research focuses on designing a bio-based epoxy-silica hybrid material enriched with SiO2 nanoparticles for stone conservation. Isosorbide, a sugar derivative from renewable sources, was used to develop epoxy thermosets functionalized with silica to form hybrid organic-inorganic networks. Various characterization techniques were used to study the properties of the materials. The resulting epoxy-silica nanocomposite showed excellent thermo-mechanical and hydrophobic properties, making it a potential candidate for stone conservation.
This research is focused on the design of a bio-based epoxy-silica hybrid, enriched with SiO2 nanoparticles, to be used in stone conservation. For this purpose, isosorbide, a sugar derivative coming from renewable sources, was selected for the development of epoxy thermosets that were functionalized adding fixed amounts of silica forming mixtures, to gain hybrid organic-inorganic networks. Fourier Transform Infrared (FTIR), Attenuated Total Reflection Infrared (ATR-FTIR) and Raman spectroscopies were exploited to follow the synthetic procedures, whereas the homogeneity of the networks was ascertained by scanning electron microscopy/energydispersive X-ray spectroscopy (SEM-EDS). The materials were investigated by thermogravimetric (TG-DTA), differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and contact angle measurements. Once the proper epoxy-silica product was identified, specifically synthesized nanoparticles were incorporated. The obtained nanocomposite showed excellent thermo-mechanical (T-onset, T-g and T-alpha of 327, 55.9 and 70.1 degrees C, respectively) and hydrophobic (105 degrees) properties making it a potential candidate for stone conservation.
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