蒽醌助剂对乙二醇溶剂脱胶苎麻纤维性能的影响

为解决苎麻在乙二醇有机溶剂脱胶中纤维易被氧化而导致性能下降的问题,在乙二醇溶剂中添加助剂蒽醌对苎麻进行脱胶,并对蒽醌不同添加量下制得的纤维进行结构和性能表征。结果表明:纤维中半纤维素含量随蒽醌添加量的增加而升高,纤维的聚合度、结晶度、物理力学性能先升高后降低,纤维的残胶率和线密度先降低后升高;当蒽醌质量分数为0.3% 时,这些性能均达到最佳值,此时纤维的聚合度、结晶度、制成率、断裂强度、断裂伸长率、断裂功比不加蒽醌时分别提高了7.32%、20.53%、1.46%、9.55%、6.89%、33.33%,纤维的残胶率、线密度比不加蒽醌时分别降低了17.91%、7.24%。

Effect of anthraquinone additive on properties of glycol solvent degummed ramie fibers

In order to solve the problem of property degradation of ramie fiber due to easy oxidation during degumming process using glycol organic solvent, anthraquinone (AQ) as degumming additive was used with glycol solvent. The properties of fibers prepared with different amounts of AQ were characterized, including polymerization degree, crystallinity, hemicellulose contents, physical and mechanical properties, and so on. The results show that the hemicellulose contents increase when AQ concentration arises. Meanwhile, the polymerization degree value, crystallinity, physical and mechanical properties of fiber show formation of peaks with the increase of AQ content. Under the best AQ mass fraction of 0.3%, the polymerization degree value, crystallinity, yield, tenacity, elongation and fracture work of fiber increase by 7.32%, 20.53%, 1.46%, 9.55%, 6.89%, 33.33%, respectively, while the residual gum content and density of fiber decrease by 17.91%, 7.24%, respectively.