Journal of Natural Fibers ( IF 3.5 ) Pub Date : 2020-09-22 Jim Rapakgadi, Lawrance Hunter, Gawie Nothnagel, Anton Botha
The effect of gamma radiation dose on certain properties of wool treated in either greasy or scoured form in mini-bales was investigated. Specific properties studied include color (yellowness and brightness), solubility (alkali solubility and urea-bisulfite solubility), fiber diameter and tensile properties (staple strength and bundle tenacity). The irradiation of the wool was performed in a commercial Cobalt-60 gamma irradiation facility to emulate practical irradiation conditions. It was found that gamma radiation dosages of up to ≈ 90 kGy did not significantly affect the fiber physical dimensions, namely fiber diameter and staple length. Alkali and urea-bisulfite solubility as well as yellowness and brightness, on the other hand, showed a systematic, almost linear, change with an increase in radiation dose. For a dose of ≈ 100 kGy, yellowness increased by ≈ 4.5 (Y-Z) units, brightness decreased by ≈ 7.5 Y units and alkali and urea-bisulfite solubility increased by ≈ 14% (absolute) above their zero dose values.
中文翻译:
伽马辐射对迷你捆形式的油腻和洗涤羊毛的影响
研究了γ辐射剂量对在小捆中以油腻或精练形式处理的羊毛某些性能的影响。研究的特定性能包括颜色(黄色和亮度),溶解度(碱溶解度和脲-亚硫酸氢盐溶解度),纤维直径和拉伸性能(短纤维强度和束韧度)。在商业Cobalt-60γ辐照设备中对羊毛进行辐照,以模拟实际辐照条件。已发现,高达≈90 kGy的伽马射线辐射剂量不会显着影响纤维的物理尺寸,即纤维直径和短纤维长度。另一方面,碱和脲-亚硫酸氢盐的溶解度以及黄度和亮度随辐射剂量的增加显示出系统的,几乎线性的变化。对于≈100 kGy的剂量,