UV stabilization of wood by nano metal oxides dispersed in propylene glycol

Nair, Shanti V.; Nagarajappa, Giridhar B.; Pandey, Krishna K.

doi:10.1016/j.jphotobiol.2018.04.007

Cited by 52 publications

(47 citation statements)

References 68 publications

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“…There was no complete inhibition on growth of both indicating the instability of the CuO nanoparticles in distilled water, as the particles that dispersed in distilled water without adding any stabilizer tend to aggregates and settle down. It corroborates the fact that the stability of the nanoparticles in the dispersing medium is one of the main factor that describes the properties of nanoparticles (Yu and Xie 2012, Nair et al 2017, Nair et al 2018.…”

Section: Figuresupporting

confidence: 80%

A new approach to wood protection: Preliminary study of biologically synthesized copper oxide nanoparticle formulation as an environmental friendly wood protectant against decay fungi and termites

Shiny

Sundararaj

Mamatha

et al. 2019

Maderas, Cienc. tecnol.

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Nanoparticles have addressed many challenges in science and technology and wood science research is one such field that has benefitted from application of metal nanoparticles. The metal nanoparticles that are commercially available for wood protection are synthesised by physical and chemical methods which produces toxic by-products and are expensive. The current study deals with a new approach for utilization of metal nanoparticle for wood protection in an ecofriendly and cost effective way. Metal nanoparticles were synthesised using plant extracts that are known to have wood preservative properties. The synergistic effects of the intrinsic property of plant extracts along with the biocidal property of metal nanoparticles were utilized. Copper oxide nanoparticles were synthesised using leaf extracts of Neem (Azadirachta indica), Pongamia (Pongamia pinnata), Lantana (Lantana camara) and extract of orange peel (Citrus reticulata). The effectiveness of the synthesised plant extract and copper oxide nanoparticle formulation is tested against wood decay fungi using agar mixed with the test substance. Graveyard test is employed to assess the effect of the copper oxide nanoparticle formulation against termites. Preliminary results are promising and studies are progressing to develop a stable and environmentally benign wood preservative formulation of metal nanoparticles and plant extracts. Ansilin, S.; Kavya Nair, J.; Aswathy, C.; Rama, V.; Peter, J.; Jeyachynthaya Persis, J. 2016. Green synthesis and characterisation of copper oxide nanoparticles using Azadirachta indica (Neem) leaf aqueous extract. J Nanosci Tech 2(5): 221-223. Cai, W.; Gao, T.; Hong, H.; Sun, J. 2008. Applications of gold nanoparticles in cancer nanotechnology.

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Section: Figuresupporting

confidence: 80%

A new approach to wood protection: Preliminary study of biologically synthesized copper oxide nanoparticle formulation as an environmental friendly wood protectant against decay fungi and termites

Shiny

Sundararaj

Mamatha

et al. 2019

Maderas, Cienc. tecnol.

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“…Polypropylene glycol can be considered a good solvent for metal oxides (ZnO, CeO 2 and TiO 2 ) nanoparticles films. An increased UV resistance and thus a decrease in lignin degradation were observed [72] (Figures 4-6).…”

Section: Main Absorption Bands CM −1mentioning

confidence: 94%

Polymeric Micro- and Nanosystems for Wood Artifacts Preservation

Ion¹,

Grigorescu²,

Iancu³

et al. 2018

New Uses of Micro and Nanomaterials

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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.

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“…Similarly, grafting polystyrene onto the NZnO surface improves dispersion but reduces UV-vis absorption, thereby decreasing the photocatalytic activity of the NZnO [17]. Nair et al prepared a stable dispersion of NZnO in propylene glycol using ultrasonication [20]. However, the addition of BTZ or NZnO in the coating revealed shortcomings, while their advantages were not fully realized [9].…”

Section: Introductionmentioning

confidence: 99%

Photostabilizing Efficiency of Acrylic-based Bamboo Exterior Coatings Combining Benzotriazole and Zinc Oxide Nanoparticles

et al. 2019

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Long-term exposure to ultraviolet (UV) light can degrade and discolor bamboo; thus, coatings to protect it from UV exposure are required, especially for outdoor use. Benzotriazole (BTZ) and zinc oxide nanoparticles (NZnO) are organic and inorganic UV absorbers commonly used in UV shielding coatings. This study investigated the photostabilizing efficiency of acrylic-based bamboo exterior coatings using a combination of BTZ and NZnO. Different film formulations covering bamboo substrates were irradiated with artificial UV light for 500 h to accelerate aging. The UV-shielding effect on bamboo beneath various films was determined by CIELAB color space and Fourier transform infrared (FTIR) analysis. The film effectiveness was analyzed by scanning electron microscopy, wettability, UV-vis spectroscopy, and FTIR-attenuated total reflection (ATR) spectroscopy. Films containing BTZ provided higher resistance to photodegradation and more effectively inhibited photodiscoloration of the bamboo substrates than those prepared solely with NZnO. After 500 h of UV irradiation, the BTZ–NZnO film containing 2 wt % BTZ and 1 wt % NZnO showed the best coating performance. Strong synergistic effects were detected in the BTZ–NZnO coatings, particularly for the 2:1 ratio formulation. This study also demonstrated the potential of combining BTZ and NZnO as additives for developing stable, effective UV-shielding bamboo exterior coatings for outdoor applications.

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UV stabilization of wood by nano metal oxides dispersed in propylene glycol

Cited by 52 publications

References 68 publications

A new approach to wood protection: Preliminary study of biologically synthesized copper oxide nanoparticle formulation as an environmental friendly wood protectant against decay fungi and termites

A new approach to wood protection: Preliminary study of biologically synthesized copper oxide nanoparticle formulation as an environmental friendly wood protectant against decay fungi and termites

Polymeric Micro- and Nanosystems for Wood Artifacts Preservation

Photostabilizing Efficiency of Acrylic-based Bamboo Exterior Coatings Combining Benzotriazole and Zinc Oxide Nanoparticles

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