scholarly journals Multiple Analysis and Characterization of Novel and Environmentally Friendly Feather Protein-Based Wood Preservatives

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 237 ◽  
Author(s):  
Yan Xia ◽  
Chengye Ma ◽  
Hanmin Wang ◽  
Shaoni Sun ◽  
Jialong Wen ◽  
...  
Keyword(s):  
Retention Rate ◽  
Energy Dispersive Spectrometer ◽  
Treated Wood ◽  
Environmentally Friendly ◽  
Wood Preservative ◽  
Decay Resistance ◽  
Wood Preservatives ◽  
X Ray Diffraction ◽  
Ft Ir ◽  
Nano Graphene

In this study, feather was used as the source of protein and combined with copper and boron salts to prepare wood preservatives with nano-hydroxyapatite or nano-graphene oxide as nano-carriers. The treatability of preservative formulations, the changes of chemical structure, micromorphology, crystallinity, thermal properties and chemical composition of wood cell walls during the impregnation and decay experiment were investigated by retention rate of the preservative, Fourier transform infrared spectroscopy (FT-IR), scanning electronic microscopy-energy dispersive spectrometer (SEM-EDS), X-ray diffraction (XRD), thermoanalysis (TG), and confocal Raman microscopy (CRM) techniques. Results revealed that the preservatives (particularly with nano-carrier) successfully penetrated wood blocks, verifying the enhanced effectiveness of protein-based preservative with nano-carrier formulations. Decay experiment demonstrated that the protein-based wood preservative can remarkably improve the decay resistance of the treated wood samples, and it is an effective, environmentally friendly wood preservative. Further analysis of these three preservative groups confirmed the excellent function of nano-hydroxyapatite as a nano-carrier, which can promote the chelation of preservatives with higher content of effective preservatives.

scholarly journals Enhancement of Wood Biological Resistance and Fire Retardant Properties after Laccase Assisted Enzymatic Grafting

Forests ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 1102
Author(s):  
Cristian Bolaño ◽  
Sabrina Palanti ◽  
Luigi Benni ◽  
Diego Moldes
Keyword(s):  
Silver Nanoparticles ◽  
Flame Retardant ◽  
Toxic Substance ◽  
Treated Wood ◽  
Fire Retardant ◽  
Wood Preservative ◽  
Decay Resistance ◽  
Kraft Lignin ◽  
Fire Retardant Properties ◽  
Wood Surfaces

Several treatments of wood, based on laccase assisted grafting, were evaluated in this paper. Firstly, the efficacy of lignosulfonate and kraft lignin from Eucalyptus spp. as a wood preservative was assessed. Both ligno products were anchored to wood surfaces via laccase treatment in order to avoid leaching. Moreover, some of these wood preservative treatments were completed with the addition of silver nanoparticles. For comparison, a commercial product was also analyzed in terms of its fungal decay resistance during surface application, in accordance to use class 3, CEN EN 335. Secondly, the anchoring of a flame retardant based on tetrabromobisphenol-A (TBBPA) was attempted, to limit the dispersion of this toxic substance from treated wood. In both cases, kraft lignin and lignosulfonate showed an improvement in wood durability, even after leaching. However, the addition of silver nanoparticles did not improve the efficacy. On the other hand, the efficacy of TBBPA as a flame retardant was not improved by grafting it with laccase treatment or by adding O2, a co-factor of laccase.

Detection of Inorganic Wood Preservatives on Timber by near Infrared Spectroscopy

1998 ◽  
Vol 6 (A) ◽  
pp. A171-A173 ◽  
Author(s):  
Roger Feldhoff ◽  
Thomas Huth-Fehre ◽  
Karl Cammann
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Treated Wood ◽  
Untreated Wood ◽  
Wood Preservative ◽  
Wood Preservatives ◽  
Copper Salts ◽  
Absorption Bands ◽  
Waste Wood

The recycling of waste wood causes great problems due to the variety of toxic wood preservatives, varnishes and paints used. The fast and reliable distinction and sorting of treated and untreated wood on demolition sites could open new ways of wood recycling, e. g. for the production of chip boards. For this purpose, prepared wood samples treated with inorganic wood preservatives (arsenic, boron, copper salts) were investigated by near infrared-spectroscopy. In most cases, treated wood samples could be distinguished from untreated ones. Furthermore the type of wood preservative could be identified. The observed spectral features are electronic absorption bands and changes in the OH–band due to interaction with salt molecules.

scholarly journals Chitosan oligomers and related nanoparticles as environmentally friendly wood preservatives

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 2800-2817
Author(s):  
Laya Khademibami ◽  
Dragica Jeremic ◽  
Rubin Shmulsky ◽  
H. Michael Barnes
Keyword(s):  
Mass Loss ◽  
Treated Wood ◽  
Environmentally Friendly ◽  
Degree Of Polymerization ◽  
Vacuum Impregnation ◽  
Wood Preservatives ◽  
Wood Protection ◽  
Low Molecular Weight Chitosan ◽  
Before And After ◽  
And Control

The efficacy of chitosan oligomers and related nanoparticles as environmentally friendly wood protection agents was evaluated in this study. Commercially sourced low-molecular weight chitosan was depolymerized using sodium nitrite. Evaluation of depolymerized chitosan to the nano level by thin layer chromatography confirmed acceptable results for obtaining a degree of polymerization of four. Then, oligomers were modified to form quaternized chitosan oligomers. Both quaternized and non-quaternized oligomers were mixed with tripolyphosphate (TPP) to form nano-chitosan-TPP particles via an ionic gelation method. Southern pine wood samples were treated with different chitosan-based solutions and suspensions under a vacuum impregnation process. The mass and volume of the treated samples were calculated before and after treatments to evaluate bulking. The mass loss after leaching of the treated wood samples was calculated. The mass and volume gain results indicated that quaternized nano-chitosan-TPP treated samples had more mass and volume gain after treatment in comparison with non-quaternized nano-chitosan-TPP-treated and control samples. The mass loss results revealed that mass loss increased in quaternized nano-chitosan-TPP particles. Although quaternized nano-chitosan particles were positively charged, they could not fix to the cell walls and became leached out. Therefore, these nanoparticles can likely be used as wood preservatives in non-leaching applications.

scholarly journals Study on optical performance of red-emitting phosphor: SrAl2O4: Eu2+, Dy3+/Sr2MgSi2O7: Eu2+, Dy3+ /light conversion agent for long-lasting luminous fibers

2021 ◽  
Author(s):  
Bohui LU ◽  
Zengyuan PANG ◽  
Yanan ZHU ◽  
Yonggui LI
Keyword(s):  
Energy Dispersive Spectrometer ◽  
Optical Performance ◽  
X Ray Diffraction ◽  
Red Emission ◽  
Ft Ir ◽  
Red Luminescence ◽  
Microscopic Morphology ◽  
Cie Chromaticity ◽  
Material Energy ◽  
Doping Ratio

Abstract A novel luminous phosphor SrAl2O4: Eu2+, Dy3+/Sr2MgSi2O7:Eu2+, Dy3+/light conversion agent with both red luminescence characteristics and persistent luminescent performance were prepared. According to the intermediary color law, the color purity of red emission can be controlled by the doping ratio of SrAl2O4: Eu2+, Dy3+ in SrAl2O4: Eu2+, Dy3+/Sr2MgSi2O7: Eu2+, Dy3+ composite luminous material. The anticipated luminescence properties could be realized precisely by adjusting the ratio. The microscopic morphology of the composite material, energy dispersive spectrometer, X-ray diffraction, FT-IR spectra, emission spectrum, CIE chromaticity diagrams and afterglow properties were examined. The brief outlines about some phenomena aspects and detailed physical descriptions as well as manuals were available. From the analyses of CIE chromaticity diagrams and afterglow properties, the doping ratio of SrAl2O4: Eu2+, Dy3+/Sr2MgSi2O7: Eu2+, Dy3+ can influence afterglow brightness and red emission purity. The samples show great optical performance.

Performance of Waterborne Cu(II) Octanoate/Ethanolamine Wood Preservatives

Holzforschung ◽  
2003 ◽  
Vol 57 (2) ◽  
pp. 127-134 ◽  
Author(s):  
M. Humar ◽  
F. Pohleven ◽  
M. Šentjurc ◽  
M. Veber ◽  
P. Razpotnik ◽  
...  
Keyword(s):  
Octanoic Acid ◽  
Treated Wood ◽  
Wood Preservative ◽  
Wood Preservatives ◽  
Paramagnetic Resonance ◽  
Coordination Environment ◽  
All Solutions ◽  
Leaching Experiments ◽  
Electron Paramagnetic ◽  
Preservative Solutions

Summary Various aqueous wood preservative solutions containing Cu(II) in the form of copper(II) sulphate or copper(II) octanoate, ethanolamine and in one case octanoic acid were investigated by spectrophotometry, polarography and Electron Paramagnetic Resonance (EPR) spectroscopy. Results have shown the same coordination environment around Cu(II) in all solutions with ethanolamine. Computer simulation of the EPR spectra also revealed that the coordination in the first coordination sphere of copper is the same at low concentration of ethanolamine. At 20% ethanolamine concentration, a mixture of two complexes (one with two nitrogens and the other with three) could be detected. The active compound in the investigated ethanolamine containing solutions is the same when previously synthesised copper(II) octanoate was used, or when copper(II) sulphate and octanoic acid were utilized instead. Fungicidal and leaching experiments with the treated wood resulted in the same conclusion: it is not necessary to use pre-synthesised copper(II) octanoate for the preparation of waterborne copper/ethanolamine wood preservatives. Preservative preparation time and costs can be reduced by simply dissolving copper(II) sulphate and octanoic acid in aqueous ethanolamine solutions.

The Component Analysis of Penetration Sealer Materials

2013 ◽  
Vol 842 ◽  
pp. 74-77 ◽  
Author(s):  
Li Wei Teng ◽  
Wei Ting Lin ◽  
Jie Chen ◽  
An Cheng ◽  
Hui Mi Hsu
Keyword(s):  
Fourier Transform ◽  
Energy Dispersive Spectrometer ◽  
Test Results ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Public ◽  
Plastic Substance ◽  
Ft Ir ◽  
Scanning Electron ◽  
Future Reference

Nowadays, its more common of dispensing a topping material like concrete crystalline penetration sealer materials (CSM) onto the surface of a plastic substance such as concrete to extend its service life span by surface protections from outside breakthrough. Its known as the CSM may penetrate into the existing pores or possible cracks in such a way that it may form crystals to block the potential paths which provide breakthrough for any unknown materials. Even though all kinds of test data and researches have been reported to boast of its advantages in both theoretical technologies and application functions, to accept that as an agreed fact, namely the major components and those proportions have not been fully announced in public or research. This study employed various experiments, such as scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffraction (XRD), X-ray fluorescence (XRF) and Fourier transform infrared spectroscopy (FT-IR), to identify key components of CSM for developing another type of CSM so that its components could be open for the public. There are two types of commercial CSM adopted for the tests and then thru a series of discusses of test results the most possible components of CSM are proposed as a future reference of CSM related researches.

Sign in / Sign up

Export Citation Format

Share Document