scholarly journals Ionic Liquids as Antifungal Agents for Wood Preservation

Molecules ◽  
2020 ◽  
Vol 25 (18) ◽  
pp. 4289
Author(s):  
Catalin Croitoru ◽  
Ionut Claudiu Roata
Keyword(s):  
Ionic Liquids ◽  
Organic Compounds ◽  
Antifungal Agents ◽  
Wood Preservation ◽  
Wood Preservatives ◽  
Wood Material ◽  
Biomass Fractionation ◽  
Penetration Ability ◽  
Lignocellulose Biomass ◽  
Over Time

Ionic liquids represent a class of highly versatile organic compounds used extensively in the last decade for lignocellulose biomass fractionation and dissolution, as well as property modifiers for wood materials. This review is dedicated to the use of ionic liquids as antifungal agents for wood preservation. Wood preservation against fungal attack represents a relatively new domain of application for ionic liquids, emerging in the late 1990s. Comparing to other application domains of ionic liquids, this particular one has been relatively little researched. Ionic liquids may be promising as wood preservatives due to their ability to swell wood, which translates into better penetration ability and fixation into the bulk of the wood material than other conventional antifungal agents, avoiding leaching over time. The antifungal character of ionic liquids depends on the nature of their alkyl-substituted cation, on the size and position of their substituents, and of their anion. It pertains to a large variety of wood-colonizing fungi, both Basidiomycetes and Fungiimperfecti.

scholarly journals Ionic liquids as potentially new antifungal agents against Alternaria species

RSC Advances ◽  
2020 ◽  
Vol 10 (38) ◽  
pp. 22318-22323
Author(s):  
Maja Karaman ◽  
Milan Vraneš ◽  
Aleksandar Tot ◽  
Snežana Papović ◽  
Dragana Miljaković ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Antifungal Agents ◽  
Antifungal Activities ◽  
Alternaria Species

The objective of this study was to examine the in vitro antifungal activities of 18 newly synthesized ionic liquids (ILs) against three Alternaria strains: A. padwickii, A. dauci and A. linicola.

Ionic liquids based fluorination of organic compounds using electrochemical method

2015 ◽  
Vol 31 ◽  
pp. 26-38 ◽  
Author(s):  
Zia Ul Haq Khan ◽  
Dondan Kong ◽  
Yongmei Chen ◽  
Nawshad Muhammad ◽  
Arif Ullah Khan ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Organic Compounds ◽  
Electrochemical Method

ChemInform Abstract: Characterization of Hydrophilic and Hydrophobic Ionic Liquids: Alternatives to Volatile Organic Compounds for Liquid-Liquid Separations

ChemInform ◽  
2010 ◽  
Vol 33 (50) ◽  
pp. no-no
Author(s):  
Ann E. Visser ◽  
W. Matthew Reichert ◽  
Richard P. Swatloski ◽  
Heather D. Willauer ◽  
Jonathan G. Huddleston ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Abstract Characterization ◽  
Volatile Organic ◽  
Hydrophobic Ionic Liquids ◽  
Liquid Separations

scholarly journals Measurements of Activity Coefficients at Infinite Dilution for Organic Solutes in the Ionic Liquids N-Ethyl- and N-Octyl-N-methylmorpholinium Bis(trifluoromethanesulfonyl)imide. A Useful Tool for Solvent Selection

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 634 ◽  
Author(s):  
Łukasz Marcinkowski ◽  
Joachim Eichenlaub ◽  
Elham Ghasemi ◽  
Żaneta Polkowska ◽  
Adam Kloskowski
Keyword(s):  
Ionic Liquids ◽  
Organic Compounds ◽  
Activity Coefficients ◽  
Infinite Dilution ◽  
Retention Data ◽  
Separation Processes ◽  
Study Results ◽  
Conscious Choice ◽  
Potential Applications ◽  
Partial Molar Enthalpies

In recent years, many papers describing ionic liquids (IL) as promising solvents in separation techniques have been published. The conscious choice of appropriate ionic liquid as absorption media in effective extraction of selected types of analytes requires deeper understanding of the analyte−IL interactions. Therefore, intensive research is conducted to determine the values of activity coefficient at infinite dilution, which allows us to characterize the nature of these interactions. Based on the inverse gas chromatography retention data, activity coefficients at infinite dilution γ 13 ∞ of 48 different organic compounds in the ionic liquids N-ethyl-N-methylmorpholinium bis(trifluoromethanesulfonyl)imide [C2C1Mor][TFSI] and N-octyl-N-methylmorpholinium bis(trifluoromethanesulfonyl)imide [C8C1Mor][TFSI] were determined. The measurements covered a broad range of volatile organic compounds, including n-alkanes, n-alkenes, n-alkynes, alcohols, aldehydes, ketones, aromatic compounds and common polar solvents, representing different types of interactions. Activity coefficients at infinite dilution were measured in the temperature range from 313.15 to 363.15 K. The excess partial molar enthalpies and entropies at infinite dilution were determined. Selectivity at infinite dilution was also calculated for exemplary separation processes in the hexane/benzene system. The obtained results were analyzed and compared with literature data for ionic liquids containing the same anion [TFSI]¯ and different cations. The study results indicate that some potential applications of the investigated ionic liquids in separation problems exist.

scholarly journals Design of a combined ionosolv-organosolv biomass fractionation process for biofuel production and high value-added lignin valorisation

2020 ◽  
Vol 22 (15) ◽  
pp. 5161-5178
Author(s):  
Meng Chen ◽  
Francisco Malaret ◽  
Anton E. J. Firth ◽  
Pedro Verdía ◽  
Aida R. Abouelela ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Value Added ◽  
Biofuel Production ◽  
Protic Ionic Liquids ◽  
Fractionation Process ◽  
Biomass Fractionation

IonoSolv pretreatment using protic ionic liquids has shown impressive biomass fractionation performance and ionic liquid recyclability.

Ionic liquids versus amine solutions in biogas upgrading: the level of volatile organic compounds

Biofuels ◽  
2013 ◽  
Vol 4 (3) ◽  
pp. 295-311 ◽  
Author(s):  
E Privalova ◽  
S Rasi ◽  
K Eränen ◽  
D Yu Murzin ◽  
J-P Mikkola
Keyword(s):  
Ionic Liquids ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Biogas Upgrading ◽  
Volatile Organic ◽  
Amine Solutions

Community analysis of preservative-treated southern pine (Pinus spp.) using terminal restriction fragment length polymorphism (T-RFLP) analysis. Part 2: Bacteria field study

Holzforschung ◽  
2012 ◽  
Vol 66 (4) ◽  
Author(s):  
Grant T. Kirker ◽  
M. Lynn Prewitt ◽  
Walter J. Diehl ◽  
Susan V. Diehl
Keyword(s):  
Restriction Fragment Length Polymorphism ◽  
Restriction Fragment ◽  
Length Polymorphism ◽  
Fragment Length ◽  
Bacterial Communities ◽  
Fragment Length Polymorphism ◽  
Wood Preservatives ◽  
Preservative Treatment ◽  
Over Time ◽  
Restriction Fragment Length

Abstract The effects of wood preservatives on the bacterial community in southern yellow pine were assessed by the molecular method ‘terminal restriction fragment length polymorphism’ (T-RFLP). Stakes, treated with 0.25% and 0.37% ammoniacal copper quat (ACQ-C), 0.1% and 0.25% chlorothalonil (CTN), 0.1% and 0.25% CTN with 2% butylated hydroxytoluene (BHT), and 2% BHT were installed with untreated controls in two field test sites in Mississippi and sampled every 90 days. Bacterial DNA was amplified by means of general 16S rDNA primers. Community data were analyzed to determine the effects of test site, exposure (above or below ground), treatment concentrations, and exposure time on the bacterial communities inhabiting the field stakes. Wood preservatives altered the bacterial communities, which fluctuated in numbers and composition over time. Initial exposure to CTN changed the pattern of species that colonized the stakes, and the bacterial communities did not become more similar to controls after CTN depletion. Bacterial communities on untreated controls were the most similar to each other and changed the least over time. Preservative treatment led to greater population turnover and increased diversity by creating a more unstable bacterial environment, which prevented these communities from reaching equilibrium. Although preservative treatment led to changes over time, there were still many shared species within and between the untreated controls and the different preservative treatments.

scholarly journals Ionic liquids as a tool for lignocellulosic biomass fractionation

2013 ◽  
Vol 1 (1) ◽  
pp. 3 ◽  
Author(s):  
Andre M da Costa Lopes ◽  
Karen G João ◽  
Ana Rita C Morais ◽  
Ewa Bogel-Łukasik ◽  
Rafał Bogel-Łukasik
Keyword(s):  
Ionic Liquids ◽  
Lignocellulosic Biomass ◽  
Biomass Fractionation

scholarly journals White-Rot Fungi Control on Populus spp. Wood by Pressure Treatments with Silver Nanoparticles, Chitosan Oligomers and Propolis

Forests ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 885 ◽  
Author(s):  
Casado-Sanz ◽  
Silva-Castro ◽  
Ponce-Herrero ◽  
Martín-Ramos ◽  
Martín-Gil ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
White Rot Fungi ◽  
Ethanolic Extract ◽  
White Rot ◽  
Wood Preservation ◽  
White Rot Fungus ◽  
Limiting Factor ◽  
Populus Spp ◽  
Over Time

There is growing interest in the development of non-toxic, natural wood preservation agents to replace conventional chemicals. In this paper, the antifungal activities of silver nanoparticles, chitosan oligomers, and propolis ethanolic extract were evaluated against white-rot fungus Trametes versicolor (L.) Lloyd, with a view to protecting Populus spp. wood. In order to create a more realistic in-service type environment, the biocidal products were assessed according to EN:113 European standard, instead of using routine in vitro antimicrobial susceptibility testing methods. Wood blocks were impregnated with the aforementioned antifungal agents by the vacuum-pressure method in an autoclave, and their biodeterioration was monitored over 16 weeks. The results showed that treatments based on silver nanoparticles, at concentrations ranging from 5 to 20 ppm, presented high antifungal activity, protecting the wood from fungal attack over time, with weight losses in the range of 8.49% to 8.94% after 16 weeks, versus 24.79% weight loss in the control (untreated) samples. This was confirmed by SEM and optical microscopy images, which showed a noticeably higher cell wall degradation in control samples than in samples treated with silver nanoparticles. On the other hand, the efficacy of the treatments based on chitosan oligomers and propolis gradually decreased over time, which would be a limiting factor for their application as wood preservatives. The nanometal-based approach is thus posed as the preferred choice for the industrial treatment of poplar wood aimed at wood-based engineering products (plywood, laminated veneer lumber, cross-laminated timber, etc.).

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