Effect of some metal nanoparticles on the spectroscopy analysis of Paulownia wood exposed to white-rot fungus

Akhtari, Maliheh; Taghiyari, Hamid Reza; Kokandeh, M Ghorbani

doi:10.1007/s00107-013-0676-5

Cited by 25 publications

(11 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The literature data showed that the increase in the 1645 cm −1 bands intensities indicate the presence of mycelium formed by C. versicolor in decayed wood samples [ 61 ]. The changes in decayed composite samples confirmed the ability of C. versicolor to utilize all major chemical components in the cell wood wall, suggesting that C. versicolor is a nonselective white-rot fungus, especially in the early step of its action, which agrees with literature data [ 62 , 63 , 64 , 65 , 66 , 67 ].…”

Section: Resultssupporting

confidence: 90%

Bioactive Propolis-Silane System as Antifungal Agent in Lignocellulosic-Polymer Composites

et al. 2022

View full text Add to dashboard Cite

Polymer composites with renewable lignocellulosic fillers, despite their many advantages, are susceptible to biodegradation, which is a major limitation in terms of external applications. The work uses an innovative hybrid propolis-silane modifier in order to simultaneously increase the resistance to fungal attack, as well as to ensure good interfacial adhesion of the filler–polymer matrix. Polypropylene composites with 30% pine wood content were obtained by extrusion and pressing. The samples were exposed to the fungi: white-rot fungus Coriolus versicolor, brown-rot fungus Coniophora puteana, and soft-rot fungus Chaetomium globosum for 8 weeks. Additionally, biological tests of samples that had been previously exposed to UV radiation were carried out, which allowed the determination of the influence of both factors on the surface destruction of composite materials. The X-ray diffraction, attenuated total reflectance–Fourier transform infrared spectroscopy, and mycological studies showed a significant effect of the modification of the lignocellulose filler with propolis on increasing the resistance to fungi. Such composites were characterized by no changes in the supermolecular structure and slight changes in the intensity of the bands characteristic of polysaccharides and lignin. In the case of systems containing pine wood that had not been modified with propolis, significant changes in the crystalline structure of polymer composites were noted, indicating the progress of decay processes. Moreover, the modification of the propolis-silane hybrid system wood resulted in the inhibition of photo- and biodegradation of WPC materials, as evidenced only by a slight deterioration in selected strength parameters. The applied innovative modifying system can therefore act as both an effective and ecological UV stabilizer, as well as an antifungal agent.

show abstract

Section: Resultssupporting

confidence: 90%

Bioactive Propolis-Silane System as Antifungal Agent in Lignocellulosic-Polymer Composites

et al. 2022

View full text Add to dashboard Cite

show abstract

“…However, micronized Cu was slightly more stable throughout aging which was attributed to the transformations during the wood use (Pantano et al 2018). In comparison with solutions of aqueous copper amine (ACA)treated woods, the micronized copper-treated woods feature a lower corrosive potential, a natural wood color, and at least the same effectiveness of protection against fungal decomposition (Lebow and Foster 2005;Freeman and McIntyre 2008;Cookson et al 2010;Akhtari, Taghiyari, and Kokandeh 2013;Platten et al 2014). However, the use of nanoparticle-containing copper formulations has led to concerns regarding their safety in general (Clausen 2007;Evans, Matsunaga, andKiguchi 2008, Kartal, Green, andClausen 2009;Civardi et al 2016) and specifically by hand-to-mouth transfer during installation or use of wooden installations (Platten et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Toxicity of copper oxide and basic copper carbonate nanoparticles after short-term oral exposure in rats

et al. 2018

View full text Add to dashboard Cite

Copper oxide (CuO) nanoparticles (NPs) and copper carbonate nanoparticles (Cu 2 CO 3 (OH) 2 NPs have applications as antimicrobial agents and wood preservatives: an application that may lead to oral ingestion via hand to mouth transfer. Rats were exposed by oral gavage to CuO NPs and Cu 2 CO 3 (OH) 2 NPs for five consecutive days with doses from 1 to 512 mg/kg and 4 to 128 mg/kg per day, respectively, and toxicity was evaluated at days 6 and 26. Both CuO NPs and Cu 2 CO 3 (OH) 2 NPs induced changes in hematology parameters, as well as clinical chemistry markers (e.g. increased alanine aminotransferase, ALT) indicative of liver damage For CuO NPs histopathological alterations were observed in bone marrow, stomach and liver mainly consisting of an inflammatory response, ulceration, and degeneration. Cu 2 CO 3 (OH) 2 NPs induced morphological alterations in the stomach, liver, intestines, spleen, thymus, kidneys, and bone marrow. In spleen and thymus lymphoid, depletion was noted that warrants further immunotoxicological evaluation. The NPs showed partial dissolution in artificial simulated stomach fluids, while in intestinal conditions, the primary particles simultaneously shrank and agglomerated into large structures. This means that both copper ions and the particulate nanoforms should be considered as potential causal agents for the observed toxicity. For risk assessment, the lowest bench mark dose (BMD) was similar for both NPs for the serum liver enzyme AST (an indication of liver toxicity), being 26.2 mg/kg for CuO NPs and 30.8 mg/kg for Cu 2 CO 3 (OH) 2 NPs. This was surprising since the histopathology evidence demonstrates more severe organ damage for Cu 2 CO 3 (OH) 2 NPs than for CuO NPs.

show abstract

“…Examples include the use of metal nanoparticles to increase thermal conductivity, to enhance panel pressing (Khojier et al 2010, Drelish 2013, Saber et al 2013, the use of nano-copper or silver particles to improve resistance to microbial attack (Akhtari et al 2013, Maresi et al 2013, Taghiyari et al 2014a) and the addition of nano-wollastonite to enhance fire resistance (Ozdemir and Tutus 2013, Taghiyari et al 2013a, 2014. Nano particles appear to produce a series of unique changes in material properties not produced with larger particles of the same material (Li 2012).…”

Section: Introductionmentioning

confidence: 99%

Effects of wollastonite on the properties of medium-density fiberboard (MDF) made from wood fibers and camel-thorn

Taghiyari

Mohammad-Panah

Morrell

2016

Maderas, Cienc. tecnol.

View full text Add to dashboard Cite

The effects of wollastonite fibers on the physical and mechanical properties of medium-density fiberboards composed of wood fibers with up to 10 % camel-thorn chips were studied. Approximately 30 % of the wollastonite fibers were less than 100 nm while the remainder were less than 1 μm. Wollastonite fibers significantly improved most of the physical and mechanical properties while addition of camel-thorn produced more variable effects on panel properties. Up to 10 % camel-thorn could be added to panels without negative effects. A combination of 10% camel-thorn and 5% wollastonite fibers produced panels with the best properties.

show abstract

Effect of some metal nanoparticles on the spectroscopy analysis of Paulownia wood exposed to white-rot fungus

Cited by 25 publications

References 4 publications

Bioactive Propolis-Silane System as Antifungal Agent in Lignocellulosic-Polymer Composites

Bioactive Propolis-Silane System as Antifungal Agent in Lignocellulosic-Polymer Composites

Toxicity of copper oxide and basic copper carbonate nanoparticles after short-term oral exposure in rats

Effects of wollastonite on the properties of medium-density fiberboard (MDF) made from wood fibers and camel-thorn

Contact Info

Product

Resources

About