Research status of structural properties of bamboo fibers

(1) Bamboo fiber structure

Bamboo fiberThe structure generally includes the chemical composition and morphological structure of bamboo fiber. Currently there are many related reports in this greeting. Huang Zhiqing analyzed the chemical composition of different origins and different types of bamboo. The main components were water, cellulose, lignin and pentosan. Jiang Jianxin and others used infrared spectroscopy (IR), X-ray diffraction and differential scanning (DSC) tested bamboo and found that the benzene alcohol extract content in bamboo is higher than that of wood, and the aspect ratio of bamboo fiber is larger than that of wood. Some literature shows that the crystallinity of bamboo fiber is 72%, which is higher than that of cotton fiber, and belongs to a kind of natural cellulose fiber with high orientation degree and high crystallinity. There are many fine grooves and some cracks on the longitudinal surfacesurface of the bamboo fiber, and there are obvious cross-links in the transverse direction, but there is no natural twist. The gaps can be fast.

Absorbs and evaporates moisture and is breathable.

(2) Moisture absorption and moisture release properties of bamboo fiber

Due to the bamboo fiber structure and the void characteristics on the cross-section, it creates favorable conditions for bamboo fiber to absorb water and evaporate water. Donghua University and Qingdao University found that bamboo fiber is a very hygroscopic fiber in the research of the structural properties of bamboo fiber. When the temperature is 20 ° C and the relative humidity is 65%, the moisture recovery of bamboo fiber is 12%. ° C and relative humidity of 95%, the moisture recovery of bamboo fiber is 45%.Fu Jufen of Soochow University tested the moisture recovery of bamboo fiber, bamboo pulp fiber and ramie fiber, and the moisture recovery of bamboo fiber and ramie fiber is close to.

(3) Physical and mechanical properties of bamboo fiber

Under dry conditions, the average breaking strength of bamboo fiber can reach 6.71cN/dtex, which is close to the breaking strength of awn fiber, much higher than cotton, tencel and viscose fibers, and under wet conditions, the breaking strength of bamboo fibers is 7.58cN / dtex, which is higher than the dry strength, the elongation at break of bamboo fibers is small, and the initial modulus Large amount, good fiber stiffness, not easy to deform under small load, belonging to high strength and low elongation fibers.

(4) Antibacterial properties of bamboo fiber

According to the literature, bamboo fiber has an antibacterial effect and its natural, environmentally friendly and long-term health properties are incomparable to any artificially added chemical substances. Experiments by Japanese researchers have shown that bamboo leeks do indeed have an antimicrobial effecteft. The same bacteria are spread in different fabrics, and the bacteria in bamboo fiber products are reduced or even disappeared in a short time. After 24 hours, the bacteria in bamboo fiber cloth The mortality rate reaches 71%, while the same number of bacteria can survive and multiply in cotton fiber and wood fiber products

(5) Other properties

The anti-ultraviolet function of bamboo fiber is also better According to the test of the Shanghai Institute of Physics, Chinese Academy of Sciences, the penetration rate of bamboo fiber to 0.02-0.0 m ultraviolet rays 0.06%, and the penetration rate of cotton is 0.06%.The ultraviolet penetration rate is 25%, and the anti-ultraviolet ability of bamboo fiber is 417 times that of cotton fiber .Research also shows that sodium copper chlorophyll in bamboo is a safe and excellent ultraviolet absorber. Bamboo fiber is also known as green and environmentally friendly fiber. As for ecological textiles, the raw material of bamboo fiber - bamboo is renewable and reusable. It does not endanger the health and safety of consumers during use. is Bamboo fiber materials can be naturally degraded after being discarded and will not pollute the environment.

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