Bamboo is a perennial monocotyledonous plant that is an excellent papermaking fiber material. According to statistics, there are more than 1200 kinds of bamboo plants in the world, which are mainly distributed in tropical and subtropical regions. A few bamboo species are distributed in temperate and frigid zones. China is the country with the most abundant bamboo resources in the world, with more than 500 species, and the cultivation area, volume, and annual production rank the highest in the world. Therefore, the development of bamboo as a papermaking raw material is an important way to effectively solve the shortage of papermaking timber in countries with a relatively low coverage of forest resources in China.
Select a representative sample of fiber raw material, cut it into the size of a matchstick along the longitudinal direction, take several roots and place it in water several times to boil, and change the water several times to remove the air in the sample until the sample sinks. Then the water in the sample was poured out and the fiber raw material was dissociated in two ways: glacial acetic acid-hydrogen peroxide method and potassium nitrate-potassium chlorate method.
The chemical composition of bamboo is an important factor in determining whether it can become a high-quality papermaking raw material, and it is also an important basis for the rational use of fiber raw materials and the formulation of technical conditions for the pulping process. Fiber analyzer analysis of fiber morphology refers to the fiber length, width, aspect ratio, cell wall thickness, cavity diameter, wall-cavity ratio, and the appearance of the fiber. Different papermaking raw materials have different fiber shapes. When evaluating the advantages and disadvantages of papermaking raw materials, fiber morphology is an important basis.
Lignin, cellulose, and hemicellulose are the main components of bamboo fiber cell walls. They are the main basis for judging the value of raw materials and determining the pulping process. The content of lignin is an important basis for formulating reasonable cooking and bleaching conditions. The higher the content, the more difficult it is to cook and the more chemicals are consumed. Cellulose and hemicellulose are expressed as the content of the holocellulose, which is an important indicator to measure the pulping yield of the fiber raw material. The higher the content, the higher the pulping yield.
Using fiber analyzers to analyze the fiber and chemical components in bamboo helps us to understand the components of the material. The fiber analyzer can measure and analyze six kinds of samples at the same time. The accuracy of the results is high. The absolute error is less than or equal to 0.4 in the experiment. The chemical reagents used need to be equipped by the measurement personnel and the instrument will not be carried automatically.
Cellulose is an element that is beneficial to human health. It can promote the movement of the gastrointestinal tract and help with digestion, but it is not absorbed by the body. The general food contains a certain amount of cellulose, too much or too little is not acceptable. In order to detect the cellulose content in food, we can use fiber analyzers to measure and analyze.