What are the characteristics of wood, the many uses of wood

Wood is a general term for trees that have been cut down. There are many kinds of wood, such as mahogany, basswood, camphor wood, fir wood, pineapple lattice, and so on. Wood expands when wet, shrinks when dry, and cracks when it is severely dry. If it is not dry or wet, it will rot. It's all right when it's all water.

1. Housing construction.

Wooden home buildings were popular many years ago and are still widely used today. Usually, wood is used in home construction as a frame for flooring, doors and windows, etc. There are many types of wood that can be used for this purpose, such as walnut.

Teak, pine.

Mango. Fences and decorative gardens are now a very fashionable trend, and the use of such wood materials is the best choice. For wooden decoration, you can be creative and decorate your home, garden, roof, etc. as much as you like, and the best woods for this type of purpose are cedar and redwood.

2. Manufacturing utensils.

To add some uniqueness to the interior of your home, try making utensils out of wood instead of plastic and iron. The best option is black walnut.

3. Create art.

As we all know, wood is widely used in sculptures, carvings to make ornaments. In addition, you may notice that the frames of art boards and color boards are mostly made of wood. The best types of wood are pine, maple.

Cherry. <>

4. Manufacture musical instruments.

Most musical instruments, such as piano, violin.

Cellos, guitars, and many other instruments must be made of wood to play the perfect tune. Mahogany, maple, ash, are all the best choices for making guitars.

5. Production of furniture.

For a long time, wooden furniture was seen as a symbol of nobility. There are several types of wood that can be used to make furniture, such as teak, mahogany.

6. Shipbuilding. Wood is one of the most important materials for shipbuilding, hardwood and softwood.

can be used. In general, the best types of wood for shipbuilding are: teak, mango, arjun, cypress, mahogany, white oak.

Fir. 7. Fuel.

The world needs energy, and the main source of energy is fuel, and before natural gas exploration, people used wood most often, because this material was readily available.

8. Stationery. We can hardly imagine life without paper and pencils. The main raw material of paper and pencil is also wood. For example: butterfly tree, sea lacquer, neem.

Not wood is characterized by reflective harshness.

The characteristics of wood are as follows:

1. Heat retention:

The main constituent substances of wood are cellulose, hemicellulose, lignin and other organic matter, and the heat conductivity is poor, so it can effectively reduce the transfer of energy, so it can be used for thermal insulation on the cookware and as a porous material at the same time, the heat stored in the same volume is much greater than the heat of metal and concrete, therefore, the house decorated with wood materials is conducive to maintaining the stability of indoor temperature.

2. Humidity adjustment function:

Compared with concrete, metal and other materials, it has a good humidity regulation function. Because cellulose, hemifiber and other substances contain a large number of hydrophilic groups, they can effectively absorb moisture in the air, absorb moisture when wet, and release moisture when dry. When the relative humidity of the environment changes, the wood can absorb or release water to slow down the change of environmental humidity, adjust the indoor humidity at a certain degree of dismantling, and create a comfortable environment.

3. Acoustic properties:

The acoustic properties of wood refer to the properties of solid materials related to sound waves, such as vibration and sound transmission of wood. The vibration characteristics of wood are influenced by the size, shape, and properties of the material itself. Many musical instruments are made of wood, such as the national musical instrument pite and dulcimer, and the Western musical instrument xylophone.

Wood with good acoustic performance quality has excellent acoustic resonance and vibrating jujube dynamic spectrum characteristics, under the force, by its own vibration sound energy, emitting a beautiful timbre, and at the same time, wood as a soundboard can expand the amplitude of string vibration and beautify its timbre. Since there is a certain relationship between the propagation of waves in wood and the strength of wood, the strength of wood can also be detected by acoustic methods or ultrasonic non-destructively, which has been applied in the protection of ancient buildings.

4. Optical features:

The unpainted wood surface has a unique glossy feeling, because its surface reflectivity is high, and it has a unique anisotropic characteristics, so that the reflection of the wood is close to uniform diffusion, and the reflected light is soft, while retaining the original texture of the wood. Wood also has the function of absorbing ultraviolet rays and reflecting infrared rays, which makes wood have the effect of protecting the eyes, and in Japan, most of the desks used in kindergartens and elementary schools are unpainted solid wood tops.

5. Acoustic characteristics:

Wood is a porous sound-absorbing material, and when used as an indoor wall, the echo generated by the sound in the room is small, and the reverberation time is appropriate, which is quieter than the interior of concrete, brick and other structures.

Physical properties of wood:

1. Density: It is an important indicator of the properties of wood, according to which the actual weight of the wood is estimated, and the technical properties of the wood and the physical and mechanical properties of the wood such as shrinkage, expansion, hardness and strength of the wood are inferred.

Therefore, the advantages are: light weight and toughness, wood is a kind of recycled material with light weight and high strength, and the density is smaller than that of metal and glass.

2. The rate of water-containing banquet dates: refers to the percentage of water weight in the wood to the weight of the dried wood. The water in wood can be divided into two parts, one part exists in the cell wall of wood cells, which is called adsorbed water; The other part is found between the cell cavity and the intercellular space and is called free water.

3. Swelling and shrinkage: the volume of wood expands after absorbing water, and shrinks when it loses water.

1. Naturalness:

Wood is a kind of natural material, in the human commonly used steel, wood, cement, plastic four main materials only it is directly taken from nature, which makes wood has the characteristics of low production cost, low energy consumption, non-toxic, non-polluting and so on.

2. Good texture:

Wood has good tactile properties that are easily acceptable and far superior to materials such as metal and glass.

3. High strength-to-weight ratio

Wood has a certain strength-to-weight ratio that is higher than that of general metals, making it a lightweight and high-strength material.

4. Heat preservation:

The thermal conductivity of wood is very small, compared to other materials, aluminum is 2,000 times more thermally conductive and plastic is 30 times more thermally conductive. As a result, wood has good thermal insulation properties.

5. Electrical insulation:

The point conductivity of wood is poor, and it is a good electrical insulating material.

6. Machinability:

Wood soft wheels are moderately stuffy and easy to process.

7. Decorative:

The wood itself has a naturally beautiful pattern, and as a furniture and decoration material, it is very decorative. Due to some of the above-mentioned unique characteristics of wood.

Wood has its unique advantages as a building material due to its properties:

1. Green and environmentally friendly, renewable and degradable.

2. The construction is simple and the construction period is short.

3. Warm in winter and cool in summer.

4. Excellent seismic performance.

Here are some common properties of wood:

Density: The density of wood varies depending on the species, generally between g cm.

Stability: Due to the hygroscopicity and shrinkage of wood, its stability is poor, and it is easy to deform, crack, warp, etc. due to environmental changes and signal disturbances.

Durability: The durability of wood varies from species to species, and in general, wood with a high hardness and high oil content is more durable.

Processability: Wood is easy to process, cut, and drill, but it is also prone to problems such as burrs and cracks. Collapse.

Plasticity: Wood can be plastically processed by heating, wetting, etc., such as bending, compression, etc.

Hygroscopicity: Wood has strong moisture absorption, which can regulate indoor humidity, but it is also easy to cause deformation, cracking and other problems.

The details are as follows: 1. Mahogany is divided into 5 genera, 8 categories and 33 species.

The second and fifth genera are named after the genera of dendrology, namely Pterocarpus, Dalbergia, Cliff Bean and Tielimu. The 8 categories are named after the trade names of wood, namely rosewood, rosewood, incense sticks, black sour branches, red sour branches, ebony, striped ebony and wenge.

1. Rosewood: sandalwood rosewood.

2. Rosewood: Vietnamese-Cambodian red sandalwood, Andaman red sandalwood, hedgehog red sandalwood, Indian red sandalwood, large-fruited red sandalwood, cystic red sandalwood, bird's foot red sandalwood.

3. Incense branch wood: fragrant sandalwood.

4. Black sour branch wood: knife-shaped black sandalwood, black sandalwood, broad-leaved sandalwood, Lu's black sandalwood, East African black sandalwood, Brazilian black sandalwood, Amazon sandalwood, Belize sandalwood.

5. Red sour branch wood: Brazilian sandalwood, Saizhou sandalwood, cochin sandalwood, fluffy sandalwood, Central American sandalwood, austellite sandalwood, slightly concave yellow.

6. Ebony: ebony, thick-petaled ebony, hairy medicine ebony, punsai ebony.

7. Striped ebony: Sulawesi ebony, Philippine ebony.

8. Wenge wood: African cliff bean wood, white flower cliff bean wood, iron knife wood.

There are red sandalwood, sour branch wood, oak, ash, yellow rosewood, agarwood, elm, maple, birch, white pine, red pine, oak, paulownia, basswood, beech, camphor wood, walnut, spruce, hemlock, pine, teak, toon, cherry, fragrant nanmu, source missing chain golden silk nanmu, water nanmu and other types.