The Antibacterial Properties Of Bamboo Fiber

The bamboo fiber is a kind of new green environmental friendly textile fiber, it has good wearing performance and natural anti-bacterial property, it is of widespread application prospect.There are two kinds of bamboo fibers, one is natural bamboo fiber, and the other is regenerated bamboo fiber.This article introduced how to produce this two kinds of bamboo fibers, compared morphological structure, supermolecular structure, chemical group, thermal property. These two kinds of bamboo fibers had similar chemical group. The structure of natural bamboo fiber and regenerated bamboo fiber were cellulose I and II, respectively .The thermal stability of natural bamboo fiber were better than regenerated bamboo fiber.This paper focused on the structure and property of the anti-bacterial component. Conjectured that anthraquinone with α and β phenolic hydroxyl group was responsible for anti-bacterial function. It was an orange crystal substance. It could dissolve in boiling water, acetone, acetic ester, ethanol, methanol, but could not dissolve in ethylether, chloroform, tetrachloromethane. It had a biggish solubility in strong alkali than the weak one.Mainly studied the influence of various chemicals like NaOH, H₂O₂, H₂SO₄, NaCl, Na₂CO₃, Na₂SO₃ , common used dyes on anti-bacterial properties of bamboo fiber. And it showed that the anti-bacterial rate of natural bamboo fiber was above 75% after treated with dilute acid under room temperature condition, it was between 55%～85% under different alkali treatment conditions. The influence of alkali and acid was smaller on regenerated bamboo fiber than on natural bamboo fiber, the anti-bacterial rate of regenerated bamboo fiber was above 70% after alkali and acid treatment. The anti-bacterial rate of two kinds of fibers could be up to 60% after treated with oxidizing agents, reducing agents, salts, surfactants used in the dyeing and finishing process. The influence of direct dyes was larger than reactive dyes on these two fibers, so we can use common reactive dyes to dye natural bamboo fiber and regenerated bamboo fiber under common dyeing conditions.Blended with other fiber like cotton, polyester fiber, silk and ramie was also researched in this paper. The anti-bacterial rate decreased as the bamboo fiber contentdecreased.