The combined effects of copper sulfate and rosin sizing agent treatment on some physical and mechanical properties of poplar wood

In order to improve the performance of soft plantation wood, an environmentally friendly inorganic-organic hybrid wood modifier was developed. First, using urea and melamine as crosslinking agents, the waterborne glucose silicone resin (MUG) was prepared with glucose under the catalysis of inorganic acid and metal ions. Then MUG resin was diluted to 10% and 20% mass fraction, and compounded with sodium silicate (S) of 20% and 10% mass fraction, so the inorganic-organic hybrid G10S20 and G20S10 wood modifier were obtained respectively. Then plantation poplar wood (Populus tomentosa) were impregnated and modified with them. Their physical and mechanical properties were tested and compared with those of the wood treated with S of 20% mass fraction (S20). Infrared analysis showed that amino resin characteristic structure (CO-NH-) existed in MUG resin. The resin has good permeability. Compared with S20 modified wood, the degree of shrinkage of G10S20 or G20S10 modified wood is reduced, their moisture absorption is reduced, and their dimensional stability is improved. Waterborne glucose silicone modifier can effectively improve the wood density, modulus of elasticity, modulus of rapture and compression strength. SEM analysis showed that the cell wall of G20S10 modified wood was significantly thicker than the untreated wood, and there were columnar and granular solid substances attached in some cell cavities, ducts and corners, etc. EDX showed that the number of Si elements on the cell wall was significantly increased compared with the control, indicating that the modifier effectively entered the wood cell wall. The waterborne glucose silicone resin can greatly improve the physical and mechanical properties of wood through organic-inorganic hybridization. It is a green, non-formaldehyde, eco-friendly, low cost, compound wood modifier with broad application prospects.

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STUDY OF PHYSICAL-MECHANICAL PROPERTIES OF CHEMICAL-THERMOMECHANICAL MASS FROM WOOD OF THE POPLING

chemistry of plant raw material ◽

10.14258/jcprm.2019024482 ◽

2019 ◽

pp. 305-310

Author(s):

Ivan Nikolaevich Koverninskij

Keyword(s):

Mechanical Properties ◽

High Efficiency ◽

Physical And Mechanical Properties ◽

Thermomechanical Pulp ◽

Poplar Wood ◽

High Quality ◽

Base Paper ◽

Pulp Paper ◽

Corrugated Cardboard ◽

Chinese Company

The article provides material on the study of chemical-thermomechanical pulp (CTMM) from poplar wood, produced by the Chinese company WeifangderuibioloDgical TECHNOLODGY CO., LTD. As a result of the research, it was established that CTMP of poplar wood has the ability to be easily milled with a significant increase (by 30–80%) of physical and mechanical properties. The interval of the possible degree of grinding, in which the mass can be used with the greatest efficiency, is recommended 30–50 °SR. CTMM in unbleached form is a high-quality primary semi-finished fibrous material that can be effectively used in combination with waste fiber for the production of corrugated paper and cardboard for flat layers of corrugated cardboard (test liner). Adding weight to the composition is appropriate in the range of 20–50%. CTMM in bleached form is a high-quality primary fiber for the production of base paper for various sanitary purposes. Compositions with bleached cellulose, in which cellulose should be added within 15–20%, will differ in high efficiency in imparting properties to paper. When using coniferous sapwood (pine, larch), a characteristic large-tonnage waste of Russian enterprises, an increase in the mechanical properties of the mass is expected by 20–30%. Such a mass will be a significant factor in the development of the production of containerboard, sanitary and hygienic, as well as other types of paper and cardboard. The CTMM technology offered by the Chinese company WeifangderuibioloDgical TECHNOLODGY CO., LTD is recommended for use by Russian timber merchants. In terms of its importance, the technology is capable of solving the tasks of developing the production of pulp, paper and cardboard, provided for in the Strategy for the Development of the Forest Complex of Russia until 2030.

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Willow wood (Salix alba) as a raw material for pulp production

Hemijska industrija ◽

10.2298/hemind0508175k ◽

2005 ◽

Vol 59 (7-8) ◽

pp. 175-179

Author(s):

Bojana Klasnja ◽

Sasa Orlovic ◽

Nenad Radosavljevic ◽

Miroslav Markovic

Keyword(s):

Mechanical Properties ◽

Chemical Composition ◽

Populus Deltoides ◽

Chemical Properties ◽

Physical And Mechanical Properties ◽

Raw Material ◽

Poplar Wood ◽

Salix Alba ◽

Pulp Production ◽

Sulphate Pulp

The properties of willow wood (structural-physical and mechanical properties and chemical composition) were investigated to determine the parameters of the technological process of semichemical and sulphate pulp manufacture. The experimental material was willow wood Salix alba cl. 107/65/7. Semichemical and sulphate pulp were obtained in the laboratory. The yield, chemical properties and physical-mechanical properties of the obtained intermediate products intended for paper manufacture, were determined. The properties of poplar wood Populus deltoides Bartr. cl.725, were studied and its pulp production performed with the aim of comparison.

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Thermally Compressed Poplar Wood (TCW): Physical and Mechanical Properties

Drvna industrija ◽

10.5552/drind.2013.1216 ◽

2013 ◽

Vol 64 (2) ◽

pp. 107-111 ◽

Cited By ~ 3

Author(s):

Zeki Candan ◽

Suleyman Korkut ◽

Oner Unsal

Keyword(s):

Mechanical Properties ◽

Physical And Mechanical Properties ◽

Poplar Wood

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EFFECTS OF IMPREGNATION WITH STYRENE AND NANO-ZINC OXIDE ON FIRE-RETARDING, PHYSICAL, AND MECHANICAL PROPERTIES OF POPLAR WOOD

CERNE ◽

10.1590/01047760201622042213 ◽

2016 ◽

Vol 22 (4) ◽

pp. 465-474 ◽

Cited By ~ 2

Author(s):

Siroos Habibzade ◽

Hamid R. Taghiyari ◽

Asghar Omidvar ◽

Hamid R. Roudi

Keyword(s):

Mechanical Properties ◽

Zinc Oxide ◽

Zno Nanoparticles ◽

Ignition Time ◽

Physical And Mechanical Properties ◽

Dry Weight ◽

Poplar Wood ◽

Nano Zinc Oxide ◽

Wood Polymer ◽

Nano Zinc

ABSTRACT Nanoparticles have been vastly applied in wood polymer composites (WPCs) in the recent years to improve some of the drawbacks of solid wood species. In the present study, the effects of ZnO nanoparticles on fire retarding, physical, and mechanical properties of polymerized poplar wood were investigated. Poplar specimens were impregnated with styrene monomer, containing four different contents of nano-zinc oxide (ZnO) (0, 0.5, 1 and 1.5%, based on the dry weight of monomer). Results of the scanning electron microscopy (SEM) showed homogeneous dispersion of ZnO nanoparticles in the WPC matrix. Nano-zinc oxide improved physical properties such as dimensional stability and water absorption. Moreover, mechanical properties increased in comparison to the control specimens. The impregnation process also significantly improved some of the fire-retarding properties, including the ignition time; however, the flammability nature of styrene aggravated some others, such as carbonized area. It was concluded that, although most of the properties were improved, the final application of WPC should be taken in to consideration before making decision on whether or not to impregnate populus wood with styrene.

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Combined Effects of Chopped Carbon and Glass Fibres on Mechanical Properties of Lime-Based Mortar

Advanced Composites Letters ◽

10.1177/096369351702600203 ◽

2017 ◽

Vol 26 (2) ◽

pp. 096369351702600

Author(s):

Burcin S. Seker ◽

Ferit Cakir ◽

Volkan Acar ◽

Mehmet O. Seydibeyoglu ◽

Hamit Akbulut

Keyword(s):

Mechanical Properties ◽

Physical And Mechanical Properties ◽

Combined Effects ◽

High Definition ◽

Hydraulic Lime ◽

Glass Fibres ◽

Inorganic Substances ◽

Third Stage ◽

Ancient Times ◽

Stage Scanning

Lime-based mortars have been used as bonding materials between stones or bricks since ancient times. It is an integral part of many structures and generally is used to fill the gaps between construction blocks (mortar joint) and strengthen the structures. Nowadays, different organic and inorganic substances are added to mortars in order to improve their physical and mechanical properties. This study deals with the combined effects of chopped carbon and glass fibres on mechanical properties of hydraulic lime-based mortar. Accordingly, lime-based mortar is prepared and chopped carbon (CCF) and glass (CGF) fibres are used as reinforcing materials in the lime-based mortar (1% by plain mortar weight). Five different combinations are investigated: Mixture-1 (100% CCF + 0% CGF), Mixture-2 (75% CCF + 25% CGF), Mixture-3 (50% CCF + 50% CGF), Mixture-4 (25% CCF + 75% CGF), Mixture-5 (0% CCF + 100% CGF). After reinforcing process, mechanical characterization tests are conducted on the mixtures at the end of 28 days curing. In the second stage, scanning electron microscope (SEM) observations and high definition visual inspection are carried out in order to investigate the interface mechanism between fibres and mortar. In the third stage, one-way analysis of variance (ANOVA) is performed to see whether differences between mechanical properties are statistically significant.

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Physical and Mechanical Properties of Poplar Wood Modified by Glucose-Urea-Melamine Resin/Sodium Silicate Compound

Forests ◽

10.3390/f12020127 ◽

2021 ◽

Vol 12 (2) ◽

pp. 127

Author(s):

Qiangqiang Liu ◽

Haojia Du ◽

Wenhua Lyu

Keyword(s):

Mechanical Properties ◽

Cell Wall ◽

Sodium Silicate ◽

Physical And Mechanical Properties ◽

Modulus Of Rupture ◽

Infrared Analysis ◽

Poplar Wood ◽

Melamine Resin ◽

Characteristic Structure ◽

Modified Wood

In order to improve the performance of soft plantation wood, an environmentally friendly wood modifier was developed. First, using urea and melamine as crosslinking agents, the glucose-urea-melamine resin (MUG) was prepared with glucose under the catalysis of inorganic acid and metal ions. Then MUG, sodium silicate, and distilled water were mixed and stirred at 40 °C to prepare MUG resin/sodium silicate compound modifier (G20S10, G10S20, the subscript number represents the mass percentage of the component in the solution.). Then plantation poplar wood (Populus tomentosa) was impregnated and modified with them. Their physical and mechanical properties were tested and compared with those of the wood treated with sodium silicate of 20% mass fraction (S20). Infrared analysis showed that the amino resin characteristic structure (CO-NH-) existed in MUG, and the absorption peak of the furan ring (C=C) appeared. Compared with S20 modified wood, the shrinkage degree of G10S20 or G20S10 modified wood is reduced, their moisture absorption is decreased, and their dimensional stability is improved. MUG resin/sodium silicate compound modifier can effectively enhance the wood’s density, modulus of elasticity, modulus of rupture, and compression strength. SEM analysis showed that there were columnar and granular solid substances attached to the cell wall, cell lumen, intercellular space, and vessel of G20S10 modified wood. EDX showed that the number of Si elements on the cell wall was significantly increased compared with the control, indicating that the modifier effectively entered the wood cell wall. The G20S10 can greatly improve the wood’s physical and mechanical properties through an organic–inorganic compound synergistic effect. It is a green, non-formaldehyde, low cost wood modifier with broad application prospects.

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