scholarly journals RESEARCH OF THE PROCESS OF BIRCH WOOD IMPREGNATION WITH THE USED VEGETABLE OIL

2020 ◽  
Vol 10 (2) ◽  
pp. 161-168
Author(s):  
Aleksandr Dmitrenkov ◽  
Alexander Vostrikov ◽  
Nadezhda Nikulina ◽  
Aleksandr Borovskoy ◽  
Ekaterina Nedzel'skaya
Keyword(s):  
Heat Treatment ◽  
Vegetable Oil ◽  
Sunflower Oil ◽  
Latin Square ◽  
Regression Equations ◽  
Birch Wood ◽  
Wood Impregnation ◽  
Natural Wood ◽  
Impregnation Temperature ◽  
Modified Wood

Wood is widely used in various industries. However, the inherent ability of natural wood to absorb water and other disadvantages require its modification with various compositions. In the work, the technology of impregnation of birch wood with processed vegetable oil, which remains after cooking, has been studied. Impregnated composition was introduced into pre-prepared wood using the “hot-cold baths” method and subsequent heat treatment of wood impregnated with used sunflower oil. The influence of the main quantitative parameters of the impregnation process on the performance of wood specimens have been made using the design of the experiment according to the Greek-Latin square pattern of the fourth order. The influence of the temperature of the impregnating oil, the time of impregnation, temperature and the duration of the heat treatment on the properties of modified wood has been studied. The properties of birch wood has been evaluated by its water absorption, as well as swelling of specimens in the radial and tangential directions. The regression equations have been obtained. They describe the influence of the main parameters of the impregnatio process with processed sunflower oil on the properties of modified wood. The best conditions for introducing processed sunflower oil into wood have been established. The proposed impregnating composition improves decorative properties of wood. It is odorless and environmentally friendly. It has been shown that treating birch wood with processed vegetable oil makes it possible to obtain modified wood with increased resistance to water

scholarly journals COMPARISON OF EFFICIENCY OF NATURAL AND SYNTHETIC IMPREGNATING COMPOSITIONS FOR BIRCH WOOD

2020 ◽  
Vol 8 (1) ◽  
pp. 193-198
Author(s):  
Larisa Belchinskaya ◽  
A. Dmitrenkov ◽  
Konstantin Zhuzhukin
Keyword(s):  
Water Absorption ◽  
Vegetable Oils ◽  
Wood Species ◽  
Sunflower Oil ◽  
Corn Oil ◽  
Engine Oil ◽  
Birch Wood ◽  
Hydrophobic Properties ◽  
Natural Wood ◽  
Oil Sunflower

The article is devoted to the study of technologies for the use of used motor and vegetable oils for hydrophobizing treatment of birch wood. In this work, synthetic and semi-synthetic engine oil is used to impregnate wood; spent corn oil, sunflower oil, organosilicon liquid GKZh-11, industrial impregnating composition of ZhTK. The effectiveness of the impregnating compositions is estimated by the indicators of water absorption and swelling in two mutually perpendicular directions (radial, tangential). Spent motor and vegetable oils saturate wood quite well and give it hydrophobic properties. At the same time, impregnation of birch wood with used engine oil (OMM) allows to improve water absorption of birch wood by 52.1% compared to natural wood and by 21% compared to water absorption. Thus, the processing of birch wood with used motor and vegetable oils makes it possible to utilize production waste and improve the properties of low-value wood species with a significant increase in its resistance to external influences.

scholarly journals Ways to improve the properties of natural wood when using waste vegetable oils

2021 ◽  
Vol 875 (1) ◽  
pp. 012063
Author(s):  
A Dmitrenkov ◽  
N Nikulina ◽  
S Nikulin ◽  
G Vostrikova
Keyword(s):  
Vegetable Oil ◽  
Sunflower Oil ◽  
Wood Flour ◽  
Environmental Safety ◽  
Aspen Wood ◽  
Plant Oil ◽  
Different Types ◽  
Natural Wood ◽  
The Difference ◽  
Protective Treatment

Abstract The article is devoted to the development and study of new compositions based on spent sunflower oil for the protective treatment of natural wood. Samples of birch and aspen wood were selected as the subjects of the study. The processing of wood samples was carried out by the method of “hot-cold impregnation”. Refined sunflower oil was used as the oil base of the propearized compounds developed. Plant oil fillers were chosen wood flour, stearic acid, canifol and sikkativ based on metal salts. The use of developed compounds can improve the hydrophobic properties of wood, increase its water and water resistance, as well as reduce swelling in tangential and radial directions. The optimal compositions on the basis of spent vegetable oil for protective processing of birch wood have been selected. The difference in the modifying capacity of the developed compositions for different types of wood is shown on the example of birch and aspen. Propiary compounds based on spent vegetable oil have environmental safety and their use allows the disposal of food waste.

scholarly journals IMPROVING THE QUALITY OF IMPREGNATION OF BIRCH WOOD IN THE PRODUCTION OF SLEEPERS

2020 ◽  
Vol 9 (4) ◽  
pp. 126-133
Author(s):  
Svetlana Snegireva ◽  
Aleksey Platonov ◽  
Dmitriy Parinov ◽  
Ilya Medvedev ◽  
Aleksandra Kiseleva
Keyword(s):  
Service Life ◽  
Physical And Mechanical Properties ◽  
Wood Products ◽  
Antiseptic Solution ◽  
Cold Bath ◽  
Short Service Life ◽  
Wood Impregnation ◽  
Natural Wood ◽  
Modified Wood

Wood is widely used for the production of sleepers in Russia. Sleepers made of natural wood have the disadvantage – short service life. It is possible to increase the service life of wooden sleepers using pressed (modified) wood for their manufacture. Wood pressing is one of the most promising areas for improving its physical and mechanical properties. Pressed wood, in its turn, has a drawback – the ability to significantly change size and shape when humidity changes, as well as low biological resistance. The solution to this problem is to impregnate wood with an antiseptic solution with a stabilizer. The durability of pressed wood products largely depends on the quality of its impregnation and the amount of absorbed solution by the surface layer. The most simple and effective method (among the known for impregnation in the manufacture of railway sleepers) is impregnation of wood in hot-cold baths. In the work, the efficiency of wood impregnation by the method of hot-cold baths has been studied taking into account various conditions of exposure to a cold solution. The first option is to quickly replace a hot solution with a cold one. The second is the impregnation of wood during the natural cooling of hot solution. It was found that the depth of wood impregnation during gradual cooling of wood in a hot solution is 2.5 times less than the depth of impregnation during cooling in a cold solution, both in the longitudinal and transverse directions. The amount of solution absorbed by wood when impregnated by the hot-cold bath method with the gradual cooling of hot impregnating solution is 16% less than when cooling in a cold impregnating solution. Hot-cold bath method with cooling in a cold solution can be recommended for the manufacture of sleepers from modified wood

scholarly journals THE PROSPECT OF USING A-VINYLNAPHTHALENE FOR MODIFICATION OF WOOD MATERIALS

2021 ◽  
Vol 6 (2) ◽  
pp. 73-79
Author(s):  
N. Nikulina ◽  
A. Dmitrenkov ◽  
S. Nikulin ◽  
L. Vlasova ◽  
N. Sannikova
Keyword(s):  
Elevated Temperatures ◽  
External Factors ◽  
Radical Mechanism ◽  
Birch Wood ◽  
Natural Polymer ◽  
Wood Polymer ◽  
Natural Wood ◽  
Protective Treatment ◽  
Composite Samples ◽  
Modified Wood

Natural wood is the most common natural polymer material that is affordable, non-toxic and widely used in various fields of industry and construction. However, wood also has disadvantages, to eliminate which it is modified with the use of organic and inorganic agents, oligomers and polymers that can protect it from external factors. The paper studies the possibility of using such a vinylaromatic monomer as α-vinylnaphthalene for modification and protective treatment of natural birch wood. It is shown that during processing in the conductive elements of birch wood under the influence of elevated temperatures, the polymerization of α-vinyl naphthalene proceeds by a radical mechanism. However, 100 % conversion of α-vinylnaphthalene and polyvinylnaphthalene cannot be achieved. Thus, the conductive elements of natural wood contain a composite consisting of α-vinyl naphthalene and polyvinyl naphthalene. It is shown that with an increase in the content of the proposed modifier in birch wood, water absorption and swelling of wood-polymer-monomer composite samples significantly decreases. This will increase the service life of products based on modified wood. The introduction of the proposed technology for modifying low-value wood species will contribute to the conservation of forest resources and their rational use

LOCATION OF OILSEED PRODUCTION IN TERMS OF VEGETABLE OIL EXPORT

2020 ◽  
Vol 1 (10) ◽  
pp. 94-100
Author(s):  
Yu. V. RAGULINA ◽  
Keyword(s):  
Seed Production ◽  
Vegetable Oil ◽  
Vegetable Oils ◽  
Sunflower Oil ◽  
World Export ◽  
Oil Export ◽  
Oilseed Production

The article is devoted to the issues of placing seed production in the conditions of world export of vegetable oils. In 2019, the volume of Russian exports of sunflower oil exceeded 3 million tons for a total of $ 2,2 billion, which is about 30% of the vegetable oil produced in the country. In Russia, the main oilseeds are sunflower, rapeseed, and soy. Less common crops include oilseed flax, ginger, mustard, and safflower. It is stated that in 2001–2019, the acreage of all types of oilseeds in the country increased by more than 2 times, and the gross harvest – by 3,3 times, while the yield increased by 1,4 times.

scholarly journals Review of Functional Treatments for Modified Wood

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 327
Author(s):  
Morwenna J. Spear ◽  
Simon F. Curling ◽  
Athanasios Dimitriou ◽  
Graham A. Ormondroyd
Keyword(s):  
High Performance ◽  
Responsive Materials ◽  
Wood Modification ◽  
Wide Range ◽  
Natural Wood ◽  
Impregnation Modification ◽  
New Applications ◽  
New Generation ◽  
Dimensional Instability ◽  
Modified Wood

Wood modification is now widely recognized as offering enhanced properties of wood and overcoming issues such as dimensional instability and biodegradability which affect natural wood. Typical wood modification systems use chemical modification, impregnation modification or thermal modification, and these vary in the properties achieved. As control and understanding of the wood modification systems has progressed, further opportunities have arisen to add extra functionalities to the modified wood. These include UV stabilisation, fire retardancy, or enhanced suitability for paints and coatings. Thus, wood may become a multi-functional material through a series of modifications, treatments or reactions, to create a high-performance material with previously impossible properties. In this paper we review systems that combine the well-established wood modification procedures with secondary techniques or modifications to deliver emerging technologies with multi-functionality. The new applications targeted using this additional functionality are diverse and range from increased electrical conductivity, creation of sensors or responsive materials, improvement of wellbeing in the built environment, and enhanced fire and flame protection. We identified two parallel and connected themes: (1) the functionalisation of modified timber and (2) the modification of timber to provide (multi)-functionality. A wide range of nanotechnology concepts have been harnessed by this new generation of wood modifications and wood treatments. As this field is rapidly expanding, we also include within the review trends from current research in order to gauge the state of the art, and likely direction of travel of the industry.

Chemical improvement of surfaces. Part 3: Covalent modification of Scots pine sapwood with substituted benzoates providing resistance to Aureobasidium pullulans staining fungi

Holzforschung ◽  
2015 ◽  
Vol 69 (5) ◽  
pp. 595-601 ◽  
Author(s):  
Jan C. Namyslo ◽  
Dieter E. Kaufmann ◽  
Carsten Mai ◽  
Holger Militz
Keyword(s):  
Scots Pine ◽  
Aureobasidium Pullulans ◽  
Covalent Modification ◽  
Attenuated Total Reflection ◽  
Chemically Modified ◽  
Covalently Bonded ◽  
Blue Stain ◽  
Natural Wood ◽  
The Individual ◽  
Modified Wood

Abstract The development of appropriate chemical precursors that can covalently functionalize natural wood aims at efficient restriction of deterioration. Biological staining experiments were performed with veneer pieces made of sapwood of Scots pine (Pinus sylvestris L.) that had previously been chemically modified with substituted benzoates. Based on the recently published protocol on esterification of wood by means of 1H-benzotriazole activation, the quantity of covalently bonded organomaterials (QCOs), a recently defined advantageous value considering the individual molecular weight of the functionalizing organochemical groups, was obtained in the range of 0.9–1.5 mmol g-1. The modified wood was analyzed by attenuated total reflection IR spectroscopy. Modification with three electronically different benzoates clearly reduced the colonization of the specimen’s surfaces by the blue stain fungus Aureobasidium pullulans but did not fully prevent it. The degree of colonization appeared to decrease with increasing QCO values of the modification agents but apparently did not strongly depend on the additional functionality of the benzoate.

Modification of Hydrogen Zeolite with CeO2 and its Catalysis Application for Preparing Aspirin

2014 ◽  
Vol 809-810 ◽  
pp. 884-889
Author(s):  
Zhen Tan ◽  
Hui Ying Chen ◽  
Bi Hao Lan ◽  
Xiang Wen Tong ◽  
Xiao Mei Ba
Keyword(s):  
Heat Treatment ◽  
Calcination Temperature ◽  
Catalytic Efficiency ◽  
Optimal Conditions ◽  
Calcination Time ◽  
Zeolite Framework ◽  
High Efficient ◽  
Zeolite Particle ◽  
Before And After ◽  
Impregnation Temperature

Hydrogen zeolite was modified with CeO2 by impregnation - filtration - heat treatment. Hydrogen-zeolite samples before and after modification were characterized by XRD and SEM. The catalytic efficiency of modified hydrogen-zeolite was investigated. Such modification conditions were explored: as the CeO2 percentage, calcination temperature, calcination time, impregnation temperature. The results show that the optimal CeO2 percentage is 0.5%, calcination temperature is 600°C, calcination time is 2h, impregnation temperature is 75°C. The aspirin yield reaches 78.3% under the optimal conditions, compared with that (64.8%) catalyzed by sulfuric acid and that (70.4%) catalyzed by unmodified zeolite. XRD, SEM characterizations show that Ce ions can be doped into the zeolite framework. And the modification makes the zeolite particle size become smaller, which is reduced to 50.5nm from 56.76nm. A high efficient and eco-enviromently catalyst was got by modification.

Properties of model systems of sunflower oil and green coffee extract after heat treatment and storage

LWT ◽  
2014 ◽  
Vol 59 (1) ◽  
pp. 467-478 ◽  
Author(s):  
Grażyna Budryn ◽  
Ewa Nebesny ◽  
Dorota Żyżelewicz ◽  
Joanna Oracz
Keyword(s):  
Heat Treatment ◽  
Sunflower Oil ◽  
Model Systems ◽  
Green Coffee ◽  
And Storage

scholarly journals THE USE OF NANOSCALE ZINC OXIDE IN WOOD-BASED COMPOSITIONS

2021 ◽  
Author(s):  
S. Neminushchaya ◽  
E. Tomina ◽  
A. Dmitrenkov
Keyword(s):  
Zinc Oxide ◽  
Vegetable Oil ◽  
Zinc Oxide Nanoparticles ◽  
Sol Gel ◽  
Environmental Safety ◽  
Oxide Nanoparticles ◽  
Natural Wood ◽  
Oxide Particles ◽  
Used Vegetable Oil ◽  
20 Nm

The aim of this work was to study compositions based on vegetable oil waste and nanoscale zinc oxide particles for processing natural wood. The sol-gel method was used for the synthesis of zinc oxide nanoparticles. The synthesized zinc oxide nanoparticles did not contain impurities and had a shape close to spherical, and their size did not exceed 20 nm. We used freshly prepared suspensions of zinc oxide nanoparticles in used vegetable oil with their content in the amount of 0.1, 0.5 and 1.0 wt. parts per 100 parts of oil. The wood was treated by hot-cold impregnation. The tests were carried out on samples of birch and pine wood of standard sizes. In the modified samples, the wetting angle, moisture and water absorption, as well as their swelling were determined. It is shown that the use of zinc oxide nanoparticles in compositions based on vegetable oil waste can significantly reduce the moisture and water resistance of wood and reduce its swelling. The optimal dosages of the nanopowder introduced into the used vegetable oil and the conditions of impregnation were selected. The compositions used on the basis of vegetable oil waste are characterized by environmental safety, and the resulting wood samples had an improved appearance.

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