亚麻废纱制备的纤维素基高吸水保水树脂及其性能

为了解决目前麻纺工业废料后续处理及环境污染问题，以麻纺企业废弃的亚麻纱线为原料，进行化学脱胶获取纤维素，采用非均相聚合体系，以纤维素为基质接枝丙烯酸单体制备高吸水保水树脂。采用单因素实验针对制备体系的工艺条件进行优化，并对较优条件下制备的纤维素基高吸水保水树脂进行性能表征。结果表明：最优合成工艺为单体丙烯酸、引发剂过硫酸铵、交联剂N, N’-亚甲基双丙烯酰胺用量分别为5、0.1、0.04 g/g纤维素，反应温度70℃，反应时间3 h；合成高吸水保水树脂在去离子水、自来水和0.9 wt%盐水中吸水倍率分别为658 g/g、382 g/g和65 g/g；室温（25℃）下自然风干12 d，保水率为74.3 %，鼓风干燥箱内30℃放置10 h，保水率为81.2 %，60 ℃放置10 h，保水率为26.4 %。说明制备的亚麻纤维素基高吸水保水树脂具有良好的吸水保水性能，可广泛应用于在农林、园艺等实际生产领域。

Synthesis and characterization ofnovel cellulose-based superabsorbent resin using waste flax yarns

In order to solve the problems of further treatment and environmental pollution caused by textile industry waste, flax yarn waste was used to prepare cellulose through chemical degumming process. Then the product was grafted with acrylic acid to synthesize a novel cellulose-based superabsorbent composite. The synthesis process was optimized by single-factor experiments and the property of the product was also characterized. The optimal synthesis conditions obtained were: crylic acid at 5 g/g cellulose, ammonium persulfate at 0.1 g/g cellulose, N, N′-methylene-bis-acrylamide at 0.04 g/g cellulose, reaction temperature at 70℃, reaction time at 3 h. The water absorbencies of the obtained superabsorbent composite were 656 g/g distilled water, 382 g/g natural rainwater and 65 g/g 0.9wt% aqueous NaCl solution. The water retentions were 74.3% when the product was air dried at room temperature for 12 d, and 81.2 and 26.4% respectively when it was dried in oven at 30 and 60℃ for 10 h. The encouraging results suggest that the synthesized flax cellulose-based superabsorbent composite possess good water absorbency and retention capacities and can be used in the fields of agriculture and horticulture.