Shellac/nanoparticles dispersions as protective materials for wood

Weththimuni, Maduka L.; Capsoni, Doretta; Malagodi, Marco; Milanese, Chiara; Licchelli, Maurizio

doi:10.1007/s00339-016-0577-7

Cited by 32 publications

(51 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Dispersion in acrylic polymers leads to a reduced yellowing and improved optical properties after artificially weathering for up to 1500 h [56]. Shellac nanosystems were studied in [66] as wood coating and different property modifications were observed using various nanofillers. For shellac-ZnO systems, the inhibition or the slowing down of the UV degradation was obtained.…”

Section: New Uses Of Micro and Nanomaterialsmentioning

confidence: 99%

Polymeric Micro- and Nanosystems for Wood Artifacts Preservation

Ion¹,

Grigorescu²,

Iancu³

et al. 2018

New Uses of Micro and Nanomaterials

View full text Add to dashboard Cite

The complex methods of diagnosis investigation of the wood artifacts state and proper materials for their protection against decay are very important goals in cultural heritage. This chapter focuses on the recent trends in micro-and nanostructured polymer systems for application in cultural heritage and on wood preservation, especially. The synthesis, properties, and applications, as well as the relevant analysis techniques to reveal the structures and properties of polymer systems, are discussed, too. To overcome the specific problems that exist for wood artifacts, some aspects should be treated: effects of the environmental factors, as moisture and pollutant absorption into the wood fibers, over-exposure effect of sun or artificial light sources, biological attack of different microorganisms, and the effects of the protective and decorative coatings.

show abstract

Section: New Uses Of Micro and Nanomaterialsmentioning

confidence: 99%

Polymeric Micro- and Nanosystems for Wood Artifacts Preservation

Ion¹,

Grigorescu²,

Iancu³

et al. 2018

New Uses of Micro and Nanomaterials

View full text Add to dashboard Cite

show abstract

“…In most cases, the nanoparticles enhance the performance of the protective treatments in terms of coated wood durability (resistance to photodegradation, fungal growth, staining, and discoloration) as well as of its mechanical properties (e.g., enhanced scratch resistance). [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…The application of surface coatings still represents the most common practice for wood protection. Coatings for wood can be based on synthetic polymers (e.g., polyurethanes, polyesters, and polyacrylates) or on more traditional materials of natural origin (resins, oils, and waxes) [15,40].…”

Section: Introductionmentioning

confidence: 99%

Improving Wood Resistance to Decay by Nanostructured ZnO-Based Treatments

Weththimuni

Capsoni

Malagodi

et al. 2019

Journal of Nanomaterials

Self Cite

View full text Add to dashboard Cite

In this study, the maple wood surface was coated with nanostructured zinc oxide, grown on the surface by using a hydrothermal process, and furtherly treated with shellac varnish. Samples obtained both after ZnO treatment and after the final varnish application were characterized by different techniques, i.e., X-ray diffraction (XRD), scanning electron microscopy combined with energy-dispersive X-ray spectroscopy (SEM-EDS), micro-FTIR with attenuated total reflectance (μ-ATR-FTIR), chromatic variation measurements, and contact angle determinations. Analytical results showed that the wood surface was covered by quite a homogeneous array of inorganic nanoparticles and that the natural resin forms a regular film over the ZnO nanostructures. An accelerated aging test was used to evaluate the protecting effectiveness of the treatments towards UV-induced decay of wood material. After the test, wood treated with ZnO and with the shellac/ZnO combination underwent a considerably lower chromatic change if compared to the untreated wood, suggesting an enhanced resistance of the treated maple to the decay due to light exposition. The presence of nanostructured ZnO protects from decay not only the wood substrate but also the shellac film. A microbiology test showed that growth of fungal species, e.g., common mold, is prevented on the wood surface treated with ZnO or with shellac/ZnO, indicating that the nanostructured zinc oxide also provides an effective protection from biodeterioration. The coating obtained by consecutive application of nanosized ZnO particles and shellac varnish combines the excellent aesthetical features and water repellence of the traditional finish with the protecting effectiveness of the nanostructured inorganic component.

show abstract

“…Improved properties for wood protection can be achieved for shellac films as a coating by dispersing inorganic nanoparticles (1-2%) in alcoholic shellac solution as demonstrated by Weththimuni et al in [9]. Increased hardness and increased UV resistance can be obtained using ZrO 2 and ZnO nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Shellac Thin Films Obtained by Matrix-Assisted Pulsed Laser Evaporation (MAPLE)

et al. 2018

View full text Add to dashboard Cite

We report on the fabrication of shellac thin films on silicon substrates by matrix-assisted pulsed laser evaporation (MAPLE) using methanol as matrix. Very adherent, dense, and smooth films were obtained by MAPLE with optimized deposition parameters, such as laser wavelength and laser fluence. Films with a root mean square (RMS) roughness of 11 nm measured on 40 × 40 µm 2 were obtained for a 2000-nm-thick shellac film deposited with 0.6 J/cm 2 fluence at a laser wavelength of 266 nm. The MAPLE films were tested in simulated gastric fluid in order to assess their capabilities as an enteric coating. The chemical, morphological, and optical properties of shellac samples were investigated by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and atomic force microscopy (AFM). Author Contributions: Investigation, S.B.; Formal Analysis, A.B. and V.M.; Conceptualization, A.M.; Supervision, B.M.; Writing-Review & Editing, A.M., B.M., S.B., A.B. and V.M. Conflicts of Interest:The authors declare no conflict of interest. Author Contributions: Investigation, S.B.; Formal Analysis, A.B. and V.M.; Conceptualization, A.M.; Supervision, B.M.; Writing-Review & Editing, A.M., B.M., S.B., A.B. and V.M.

show abstract

Shellac/nanoparticles dispersions as protective materials for wood

Cited by 32 publications

References 35 publications

Polymeric Micro- and Nanosystems for Wood Artifacts Preservation

Polymeric Micro- and Nanosystems for Wood Artifacts Preservation

Improving Wood Resistance to Decay by Nanostructured ZnO-Based Treatments

Shellac Thin Films Obtained by Matrix-Assisted Pulsed Laser Evaporation (MAPLE)

Contact Info

Product

Resources

About