用预辐射接枝技术制备复合型离子交换纤维

Preparation of Composite Ion-exchange Fibers by Pre-irradiation Graft Technique

以皮芯复合纤维为原料,采用有氧预辐射接枝法制备了弱酸性复合型离子交换纤维。对吸收剂量、反应温度、阻聚剂质量分数以及光敏剂含量等影响因素进行了研究。结果表明,在一定的吸收剂量范围内,接枝率随吸收剂量的增加而提高,最高可达1 600%以上;接枝率随反应温度和阻聚剂质量分数的提高,都呈现先增加后降低的趋势,其中最佳反应温度在70 ℃左右,最佳阻聚剂质量分数在0 25%左右;在加入一定量光敏剂后,在相同条件下,所需的吸收剂量显著降低,且随光敏剂加入量的增大,效果更加明显。

Starting with core-sheath composite fibers into which some photosensitizer has been mixed, weak acidic composite ion-exchange fibers are produced by pre-irradiation grafting in the presence of oxygen. The influence of absorption dose, reaction temperature, inhibitor and photosensitizer on the grafting degree is investigated. The results show that the grafting degree increases with the increase in the absorption dose, and up to 1600% is attainable. In the plots of grafting degree against temperature and against inhibitor concentration, a maximum is observed. An optimal temperature of approximately equals 70°C and a best concentration of the inhibitor of 0.25% (mass fraction) are deduced. The addition of some photosensitizer significantly depresses the necessary absorption dose. The more the photosensitizer is added, the more remarkable the sensitization effect will be.