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Study of moisture absorption property of the wool with different finess
Abstract
Through the moisture absorption and desorption experiments for the 66, 80, 90 and 100 S wool, it gots the moisture absorption and desorption curve and the fitting equation. Through statistical and compute it, the result that higher quality, finer fiber, and the moisture absorption and desorption regain rate were all increased, and the desorption regain rate of each fiber were greater than the absorption regain rate. The finer fibers' rate of the moisture absorption in the initial stage was greater, and through period of time, coarse fibers' moisture absorption rate was greater. In the desorption process, in the initial stage 100 S wool fibers' desorption rate was the slowest, and through period of time it was the fastest.
... As the fiber material can adjust the micro-environment inside the garment by absorbing and dispersing moisture, it can adapt to the ambient temperature and humidity [8]. Recent research shows that a mixed hydration model overseen by a scanning electronic microscope (SME) mechanism will be produced after wool fibers absorb water [9,10]. The moisture absorption performance of wool fiber hinges on its chemical composition and fiber structure. ...
... Figure 4b reveals that there were similar moisture desorption curves of raw and optimally treated wool fibers, and both of them feature a fast and then slow moisture desorption rate. As can be seen in Figure 5c and 5d, the regression curves of moisture absorption and liberation rate equilibrium of raw and treated wool fibers are exponential functions, on the basis of the equation for regression curves of moisture absorption and liberation rate [9]. In the whole moisture absorption and desorption process, the moisture regain of the treated wool sample was evidently higher than that of the ordinary wool fiber, which can be ascribed to the improvement of the wettability of the wool fiber surface. ...
As lightweight and comfortable wool products have become the mainstream of the market, the surface treatment technology of wool fiber has been widely observed. Here, we treated wool fibers by ultrasonic bath and oxidation in a composite method that was better able to improve the wetting properties of wool fiber. Using this approach, we investigated the main factors influencing the effect of treatment and established the regression equations of multiple indices on processing conditions; after testing and optimization, the optimum technological parameters were obtained and experimentally verified. In addition, test results revealed that the ultrasonic-oxidation treatment in the optimum process led to the disulfide bonds (S-S) of wool fiber breaking and being oxidized, but showed less effect on the fiber's supramolecular structure; the wool fiber surface became smoother and more uniform, which resulted in a greatly increased wettability; there was a remarkable decrease in contact angle, and the rate of moisture absorption and desorption was enhanced in response to optimal treatment. These findings are significant for the potential industrial application of wool fiber as a moisture-absorbing material in textile products.
... One of the facts about wool that it has the high ability of absorbs humidity and ambient moisture that reach to 30% of its weight [20]. So, it was found in figure 9 that the produced sample from Barki/polyester (45:55)% gave high water permeability rate comparing with other produced sample from (30:70)% ratio. ...
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